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- Support for HS38 cores based on ARCv2 ISA

Browse source 
ARCv2 is the next generation ISA from Synopsys and basis for the
      HS3{4,6,8} families of processors which retain the traditional ARC mantra of
      low power and configurability and are now more performant and feature rich.
 
      HS38x is a 10 stage pipeline core which supports MMU (with huge pages) and
      SMP (upto 4 cores) among other features.
 
      + www.synopsys.com/dw/ipdir.php?ds=arc-hs38-processor
      + http://news.synopsys.com/2014-10-14-New-DesignWare-ARC-HS38-Processor-Doubles-Performance-for-Embedded-Linux-Applications
      + http://www.embedded.com/electronics-news/4435975/Synopsys-ARC-HS38-core-gives-2X-boost-to-Linux-based-apps
 
  - Support for ARC SDP (Software Development platform): Main Board + CPU Cards
     = AXS101: CPU Card with ARC700 in silicon @ 700 MHz
     = AXS103: CPU Card with HS38x in FPGA
 
  - Refactoring of ARCompact port to accomodate new ARCv2 ISA
  - Miscll updates/cleanups
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Merge tag 'arc-4.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc

Pull ARC architecture updates from Vineet Gupta:

 - support for HS38 cores based on ARCv2 ISA

     ARCv2 is the next generation ISA from Synopsys and basis for the
     HS3{4,6,8} families of processors which retain the traditional ARC mantra of
     low power and configurability and are now more performant and feature rich.

     HS38x is a 10 stage pipeline core which supports MMU (with huge pages) and
     SMP (upto 4 cores) among other features.

     + www.synopsys.com/dw/ipdir.php?ds=arc-hs38-processor
     + http://news.synopsys.com/2014-10-14-New-DesignWare-ARC-HS38-Processor-Doubles-Performance-for-Embedded-Linux-Applications
     + http://www.embedded.com/electronics-news/4435975/Synopsys-ARC-HS38-core-gives-2X-boost-to-Linux-based-apps

 - support for ARC SDP (Software Development platform): Main Board + CPU Cards
    = AXS101: CPU Card with ARC700 in silicon @ 700 MHz
    = AXS103: CPU Card with HS38x in FPGA

 - refactoring of ARCompact port to accomodate new ARCv2 ISA

 - misc updates/cleanups

* tag 'arc-4.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: (72 commits)
  ARC: Fix build failures for ARCompact in linux-next after ARCv2 support
  ARCv2: Allow older gcc to cope with new regime of ARCv2/ARCompact support
  ARCv2: [vdk] dts files and defconfig for HS38 VDK
  ARCv2: [axs103] Support ARC SDP FPGA platform for HS38x cores
  ARC: [axs101] Prepare for AXS103
  ARCv2: [nsim*hs*] Support simulation platforms for HS38x cores
  ARCv2: All bits in place, allow ARCv2 builds
  ARCv2: SLC: Handle explcit flush for DMA ops (w/o IO-coherency)
  ARCv2: STAR 9000837815 workaround hardware exclusive transactions livelock
  ARC: Reduce bitops lines of code using macros
  ARCv2: barriers
  arch: conditionally define smp_{mb,rmb,wmb}
  ARC: add smp barriers around atomics per Documentation/atomic_ops.txt
  ARC: add compiler barrier to LLSC based cmpxchg
  ARCv2: SMP: intc: IDU 2nd level intc for dynamic IRQ distribution
  ARCv2: SMP: clocksource: Enable Global Real Time counter
  ARCv2: SMP: ARConnect debug/robustness
  ARCv2: SMP: Support ARConnect (MCIP) for Inter-Core-Interrupts et al
  ARC: make plat_smp_ops weak to allow over-rides
  ARCv2: clocksource: Introduce 64bit local RTC counter
  ...
This commit is contained in:
Linus Torvalds 2015-07-01 09:24:26 -07:00
commit 0890a26479
106 changed files with 7059 additions and 2394 deletions
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46
Documentation/devicetree/bindings/arc/archs-idu-intc.txt Normal file
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@ -0,0 +1,46 @@
* ARC-HS Interrupt Distribution Unit
This optional 2nd level interrupt controller can be used in SMP configurations for
dynamic IRQ routing, load balancing of common/external IRQs towards core intc.
Properties:
- compatible: "snps,archs-idu-intc"
- interrupt-controller: This is an interrupt controller.
- interrupt-parent: <reference to parent core intc>
- #interrupt-cells: Must be <2>.
- interrupts: <...> specifies the upstream core irqs
First cell specifies the "common" IRQ from peripheral to IDU
Second cell specifies the irq distribution mode to cores
0=Round Robin; 1=cpu0, 2=cpu1, 4=cpu2, 8=cpu3
intc accessed via the special ARC AUX register interface, hence "reg" property
is not specified.
Example:
core_intc: core-interrupt-controller {
compatible = "snps,archs-intc";
interrupt-controller;
#interrupt-cells = <1>;
};
idu_intc: idu-interrupt-controller {
compatible = "snps,archs-idu-intc";
interrupt-controller;
interrupt-parent = <&core_intc>;
/*
* <hwirq distribution>
* distribution: 0=RR; 1=cpu0, 2=cpu1, 4=cpu2, 8=cpu3
*/
#interrupt-cells = <2>;
/* upstream core irqs: downstream these are "COMMON" irq 0,1.. */
interrupts = <24 25 26 27 28 29 30 31>;
};
some_device: serial@c0fc1000 {
interrupt-parent = <&idu_intc>;
interrupts = <0 0>; /* upstream idu IRQ #24, Round Robin */
};

22
Documentation/devicetree/bindings/arc/archs-intc.txt Normal file
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@ -0,0 +1,22 @@
* ARC-HS incore Interrupt Controller (Provided by cores implementing ARCv2 ISA)
Properties:
- compatible: "snps,archs-intc"
- interrupt-controller: This is an interrupt controller.
- #interrupt-cells: Must be <1>.
Single Cell "interrupts" property of a device specifies the IRQ number
between 16 to 256
intc accessed via the special ARC AUX register interface, hence "reg" property
is not specified.
Example:
intc: interrupt-controller {
compatible = "snps,archs-intc";
interrupt-controller;
#interrupt-cells = <1>;
interrupts = <16 17 18 19 20 21 22 23 24 25>;
};

7
Documentation/devicetree/bindings/arc/axs101.txt Normal file
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@ -0,0 +1,7 @@
Synopsys DesignWare ARC Software Development Platforms Device Tree Bindings
---------------------------------------------------------------------------
SDP Main Board with an AXC001 CPU Card hoisting ARC700 core in silicon
Required root node properties:
- compatible = "snps,axs101", "snps,arc-sdp";

8
Documentation/devicetree/bindings/arc/axs103.txt Normal file
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@ -0,0 +1,8 @@
Synopsys DesignWare ARC Software Development Platforms Device Tree Bindings
---------------------------------------------------------------------------
SDP Main Board with an AXC003 FPGA Card which can contain various flavours of
HS38x cores.
Required root node properties:
- compatible = "snps,axs103", "snps,arc-sdp";

7
MAINTAINERS
View file

@ -9832,6 +9832,13 @@ F: arch/arc/
F: Documentation/devicetree/bindings/arc/
F: drivers/tty/serial/arc_uart.c
SYNOPSYS ARC SDP platform support
M: Alexey Brodkin <abrodkin@synopsys.com>
S: Supported
F: arch/arc/plat-axs10x
F: arch/arc/boot/dts/ax*
F: Documentation/devicetree/bindings/arc/axs10*
SYSTEM CONFIGURATION (SYSCON)
M: Lee Jones <lee.jones@linaro.org>
M: Arnd Bergmann <arnd@arndb.de>

159
arch/arc/Kconfig
View file

@ -81,17 +81,37 @@ menu "ARC Architecture Configuration"
menu "ARC Platform/SoC/Board"
source "arch/arc/plat-arcfpga/Kconfig"
source "arch/arc/plat-sim/Kconfig"
source "arch/arc/plat-tb10x/Kconfig"
source "arch/arc/plat-axs10x/Kconfig"
#New platform adds here
endmenu
choice
prompt "ARC Instruction Set"
default ISA_ARCOMPACT
config ISA_ARCOMPACT
bool "ARCompact ISA"
help
The original ARC ISA of ARC600/700 cores
config ISA_ARCV2
bool "ARC ISA v2"
help
ISA for the Next Generation ARC-HS cores
endchoice
menu "ARC CPU Configuration"
choice
prompt "ARC Core"
default ARC_CPU_770
default ARC_CPU_770 if ISA_ARCOMPACT
default ARC_CPU_HS if ISA_ARCV2
if ISA_ARCOMPACT
config ARC_CPU_750D
bool "ARC750D"
@ -100,7 +120,7 @@ config ARC_CPU_750D
config ARC_CPU_770
bool "ARC770"
select ARC_CPU_REL_4_10
select ARC_HAS_SWAPE
help
Support for ARC770 core introduced with Rel 4.10 (Summer 2011)
This core has a bunch of cool new features:
@ -109,6 +129,27 @@ config ARC_CPU_770
-Caches: New Prog Model, Region Flush
-Insns: endian swap, load-locked/store-conditional, time-stamp-ctr
endif #ISA_ARCOMPACT
config ARC_CPU_HS
bool "ARC-HS"
depends on ISA_ARCV2
help
Support for ARC HS38x Cores based on ARCv2 ISA
The notable features are:
- SMP configurations of upto 4 core with coherency
- Optional L2 Cache and IO-Coherency
- Revised Interrupt Architecture (multiple priorites, reg banks,
auto stack switch, auto regfile save/restore)
- MMUv4 (PIPT dcache, Huge Pages)
- Instructions for
* 64bit load/store: LDD, STD
* Hardware assisted divide/remainder: DIV, REM
* Function prologue/epilogue: ENTER_S, LEAVE_S
* IRQ enable/disable: CLRI, SETI
* pop count: FFS, FLS
* SETcc, BMSKN, XBFU...
endchoice
config CPU_BIG_ENDIAN
@ -117,17 +158,13 @@ config CPU_BIG_ENDIAN
help
Build kernel for Big Endian Mode of ARC CPU
# If a platform can't work with 0x8000_0000 based dma_addr_t
config ARC_PLAT_NEEDS_CPU_TO_DMA
bool
config SMP
bool "Symmetric Multi-Processing (Incomplete)"
bool "Symmetric Multi-Processing"
default n
select ARC_HAS_COH_CACHES if ISA_ARCV2
select ARC_MCIP if ISA_ARCV2
help
This enables support for systems with more than one CPU. If you have
a system with only one CPU, say N. If you have a system with more
than one CPU, say Y.
This enables support for systems with more than one CPU.
if SMP
@ -137,13 +174,20 @@ config ARC_HAS_COH_CACHES
config ARC_HAS_REENTRANT_IRQ_LV2
def_bool n
endif
config ARC_MCIP
bool "ARConnect Multicore IP (MCIP) Support "
depends on ISA_ARCV2
help
This IP block enables SMP in ARC-HS38 cores.
It provides for cross-core interrupts, multi-core debug
hardware semaphores, shared memory,....
config NR_CPUS
int "Maximum number of CPUs (2-4096)"
range 2 4096
depends on SMP
default "2"
default "4"
endif #SMP
menuconfig ARC_CACHE
bool "Enable Cache Support"
@ -185,7 +229,7 @@ config ARC_CACHE_PAGES
config ARC_CACHE_VIPT_ALIASING
bool "Support VIPT Aliasing D$"
depends on ARC_HAS_DCACHE
depends on ARC_HAS_DCACHE && ISA_ARCOMPACT
default n
endif #ARC_CACHE
@ -226,9 +270,10 @@ config ARC_HAS_HW_MPY
Multipler. Otherwise software multipy lib is used
choice
prompt "ARC700 MMU Version"
prompt "MMU Version"
default ARC_MMU_V3 if ARC_CPU_770
default ARC_MMU_V2 if ARC_CPU_750D
default ARC_MMU_V4 if ARC_CPU_HS
config ARC_MMU_V1
bool "MMU v1"
@ -249,6 +294,10 @@ config ARC_MMU_V3
Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
Shared Address Spaces (SASID)
config ARC_MMU_V4
bool "MMU v4"
depends on ISA_ARCV2
endchoice
@ -271,6 +320,8 @@ config ARC_PAGE_SIZE_4K
endchoice
if ISA_ARCOMPACT
config ARC_COMPACT_IRQ_LEVELS
bool "ARCompact IRQ Priorities: High(2)/Low(1)"
default n
@ -290,7 +341,7 @@ config ARC_IRQ5_LV2
config ARC_IRQ6_LV2
bool
endif
endif #ARC_COMPACT_IRQ_LEVELS
config ARC_FPU_SAVE_RESTORE
bool "Enable FPU state persistence across context switch"
@ -303,32 +354,53 @@ config ARC_FPU_SAVE_RESTORE
based on actual usage of FPU by a task. Thus our implemn does
this for all tasks in system.
endif #ISA_ARCOMPACT
config ARC_CANT_LLSC
def_bool n
menuconfig ARC_CPU_REL_4_10
bool "Enable support for Rel 4.10 features"
default n
help
-ARC770 (and dependent features) enabled
-ARC750 also shares some of the new features with 770
config ARC_HAS_LLSC
bool "Insn: LLOCK/SCOND (efficient atomic ops)"
default y
depends on ARC_CPU_770 && !ARC_CANT_LLSC
depends on !ARC_CPU_750D && !ARC_CANT_LLSC
config ARC_HAS_SWAPE
bool "Insn: SWAPE (endian-swap)"
default y
depends on ARC_CPU_REL_4_10
config ARC_HAS_RTSC
bool "Insn: RTSC (64-bit r/o cycle counter)"
if ISA_ARCV2
config ARC_HAS_LL64
bool "Insn: 64bit LDD/STD"
help
Enable gcc to generate 64-bit load/store instructions
ISA mandates even/odd registers to allow encoding of two
dest operands with 2 possible source operands.
default y
depends on ARC_CPU_REL_4_10
config ARC_HAS_RTC
bool "Local 64-bit r/o cycle counter"
default n
depends on !SMP
config ARC_HAS_GRTC
bool "SMP synchronized 64-bit cycle counter"
default y
depends on SMP
config ARC_NUMBER_OF_INTERRUPTS
int "Number of interrupts"
range 8 240
default 32
help
This defines the number of interrupts on the ARCv2HS core.
It affects the size of vector table.
The initial 8 IRQs are fixed (Timer, ICI etc) and although configurable
in hardware, it keep things simple for Linux to assume they are always
present.
endif # ISA_ARCV2
endmenu # "ARC CPU Configuration"
config LINUX_LINK_BASE
@ -354,8 +426,10 @@ config ARC_CURR_IN_REG
config ARC_EMUL_UNALIGNED
bool "Emulate unaligned memory access (userspace only)"
default N
select SYSCTL_ARCH_UNALIGN_NO_WARN
select SYSCTL_ARCH_UNALIGN_ALLOW
depends on ISA_ARCOMPACT
help
This enables misaligned 16 & 32 bit memory access from user space.
Use ONLY-IF-ABS-NECESSARY as it will be very slow and also can hide
@ -378,9 +452,10 @@ menuconfig ARC_DBG
bool "ARC debugging"
default y
if ARC_DBG
config ARC_DW2_UNWIND
bool "Enable DWARF specific kernel stack unwind"
depends on ARC_DBG
default y
select KALLSYMS
help
@ -394,18 +469,38 @@ config ARC_DW2_UNWIND
config ARC_DBG_TLB_PARANOIA
bool "Paranoia Checks in Low Level TLB Handlers"
depends on ARC_DBG
default n
config ARC_DBG_TLB_MISS_COUNT
bool "Profile TLB Misses"
default n
select DEBUG_FS
depends on ARC_DBG
help
Counts number of I and D TLB Misses and exports them via Debugfs
The counters can be cleared via Debugfs as well
if SMP
config ARC_IPI_DBG
bool "Debug Inter Core interrupts"
default n
endif
endif
config ARC_UBOOT_SUPPORT
bool "Support uboot arg Handling"
default n
help
ARC Linux by default checks for uboot provided args as pointers to
external cmdline or DTB. This however breaks in absence of uboot,
when booting from Metaware debugger directly, as the registers are
not zeroed out on reset by mdb and/or ARCv2 based cores. The bogus
registers look like uboot args to kernel which then chokes.
So only enable the uboot arg checking/processing if users are sure
of uboot being in play.
config ARC_BUILTIN_DTB_NAME
string "Built in DTB"
help

17
arch/arc/Makefile
View file

@ -9,12 +9,14 @@
UTS_MACHINE := arc
ifeq ($(CROSS_COMPILE),)
CROSS_COMPILE := arc-linux-uclibc-
CROSS_COMPILE := arc-linux-
endif
KBUILD_DEFCONFIG := nsim_700_defconfig
cflags-y += -mA7 -fno-common -pipe -fno-builtin -D__linux__
cflags-y += -fno-common -pipe -fno-builtin -D__linux__
cflags-$(CONFIG_ISA_ARCOMPACT) += -mA7
cflags-$(CONFIG_ISA_ARCV2) += -mcpu=archs
ifdef CONFIG_ARC_CURR_IN_REG
# For a global register defintion, make sure it gets passed to every file
@ -33,7 +35,11 @@ cflags-$(atleast_gcc44) += -fsection-anchors
cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock
cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape
cflags-$(CONFIG_ARC_HAS_RTSC) += -mrtsc
ifndef CONFIG_ARC_HAS_LL64
cflags-$(CONFIG_ISA_ARCV2) += -mno-ll64
endif
cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables
# By default gcc 4.8 generates dwarf4 which kernel unwinder can't grok
@ -81,8 +87,9 @@ core-y += arch/arc/
# w/o this dtb won't embed into kernel binary
core-y += arch/arc/boot/dts/
core-$(CONFIG_ARC_PLAT_FPGA_LEGACY) += arch/arc/plat-arcfpga/
core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/
core-$(CONFIG_ARC_PLAT_SIM) += arch/arc/plat-sim/
core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/
core-$(CONFIG_ARC_PLAT_AXS10X) += arch/arc/plat-axs10x/
drivers-$(CONFIG_OPROFILE) += arch/arc/oprofile/

2
arch/arc/boot/dts/Makefile
View file

@ -1,5 +1,5 @@
# Built-in dtb
builtindtb-y := angel4
builtindtb-y := nsim_700
ifneq ($(CONFIG_ARC_BUILTIN_DTB_NAME),"")
builtindtb-y := $(patsubst "%",%,$(CONFIG_ARC_BUILTIN_DTB_NAME))

100
arch/arc/boot/dts/axc001.dtsi Normal file
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@ -0,0 +1,100 @@
/*
* Copyright (C) 2013-15 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/*
* Device tree for AXC001 770D/EM6/AS221 CPU card
* Note that this file only supports the 770D CPU
*/
/ {
compatible = "snps,arc";
clock-frequency = <750000000>; /* 750 MHZ */
#address-cells = <1>;
#size-cells = <1>;
cpu_card {
compatible = "simple-bus";
#address-cells = <1>;
#size-cells = <1>;
ranges = <0x00000000 0xf0000000 0x10000000>;
cpu_intc: arc700-intc@cpu {
compatible = "snps,arc700-intc";
interrupt-controller;
#interrupt-cells = <1>;
};
/*
* this GPIO block ORs all interrupts on CPU card (creg,..)
* to uplink only 1 IRQ to ARC core intc
*/
dw-apb-gpio@0x2000 {
compatible = "snps,dw-apb-gpio";
reg = < 0x2000 0x80 >;
#address-cells = <1>;
#size-cells = <0>;
ictl_intc: gpio-controller@0 {
compatible = "snps,dw-apb-gpio-port";
gpio-controller;
#gpio-cells = <2>;
snps,nr-gpios = <30>;
reg = <0>;
interrupt-controller;
#interrupt-cells = <2>;
interrupt-parent = <&cpu_intc>;
interrupts = <15>;
};
};
debug_uart: dw-apb-uart@0x5000 {
compatible = "snps,dw-apb-uart";
reg = <0x5000 0x100>;
clock-frequency = <33333000>;
interrupt-parent = <&ictl_intc>;
interrupts = <19 4>;
baud = <115200>;
reg-shift = <2>;
reg-io-width = <4>;
};
arcpmu0: pmu {
compatible = "snps,arc700-pct";
};
};
/*
* This INTC is actually connected to DW APB GPIO
* which acts as a wire between MB INTC and CPU INTC.
* GPIO INTC is configured in platform init code
* and here we mimic direct connection from MB INTC to
* CPU INTC, thus we set "interrupts = <7>" instead of
* "interrupts = <12>"
*
* This intc actually resides on MB, but we move it here to
* avoid duplicating the MB dtsi file given that IRQ from
* this intc to cpu intc are different for axs101 and axs103
*/
mb_intc: dw-apb-ictl@0xe0012000 {
#interrupt-cells = <1>;
compatible = "snps,dw-apb-ictl";
reg = < 0xe0012000 0x200 >;
interrupt-controller;
interrupt-parent = <&cpu_intc>;
interrupts = < 7 >;
};
memory {
#address-cells = <1>;
#size-cells = <1>;
ranges = <0x00000000 0x80000000 0x40000000>;
device_type = "memory";
reg = <0x00000000 0x20000000>; /* 512MiB */
};
};

102
arch/arc/boot/dts/axc003.dtsi Normal file
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@ -0,0 +1,102 @@
/*
* Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/*
* Device tree for AXC003 CPU card: HS38x UP configuration
*/
/ {
compatible = "snps,arc";
clock-frequency = <75000000>;
#address-cells = <1>;
#size-cells = <1>;
cpu_card {
compatible = "simple-bus";
#address-cells = <1>;
#size-cells = <1>;
ranges = <0x00000000 0xf0000000 0x10000000>;
cpu_intc: archs-intc@cpu {
compatible = "snps,archs-intc";
interrupt-controller;
#interrupt-cells = <1>;
};
/*
* this GPIO block ORs all interrupts on CPU card (creg,..)
* to uplink only 1 IRQ to ARC core intc
*/
dw-apb-gpio@0x2000 {
compatible = "snps,dw-apb-gpio";
reg = < 0x2000 0x80 >;
#address-cells = <1>;
#size-cells = <0>;
ictl_intc: gpio-controller@0 {
compatible = "snps,dw-apb-gpio-port";
gpio-controller;
#gpio-cells = <2>;
snps,nr-gpios = <30>;
reg = <0>;
interrupt-controller;
#interrupt-cells = <2>;
interrupt-parent = <&cpu_intc>;
interrupts = <25>;
};
};
debug_uart: dw-apb-uart@0x5000 {
compatible = "snps,dw-apb-uart";
reg = <0x5000 0x100>;
clock-frequency = <33333000>;
interrupt-parent = <&ictl_intc>;
interrupts = <2 4>;
baud = <115200>;
reg-shift = <2>;
reg-io-width = <4>;
};
arcpct0: pct {
compatible = "snps,archs-pct";
#interrupt-cells = <1>;
interrupt-parent = <&cpu_intc>;
interrupts = <20>;
};
};
/*
* This INTC is actually connected to DW APB GPIO
* which acts as a wire between MB INTC and CPU INTC.
* GPIO INTC is configured in platform init code
* and here we mimic direct connection from MB INTC to
* CPU INTC, thus we set "interrupts = <7>" instead of
* "interrupts = <12>"
*
* This intc actually resides on MB, but we move it here to
* avoid duplicating the MB dtsi file given that IRQ from
* this intc to cpu intc are different for axs101 and axs103
*/
mb_intc: dw-apb-ictl@0xe0012000 {
#interrupt-cells = <1>;
compatible = "snps,dw-apb-ictl";
reg = < 0xe0012000 0x200 >;
interrupt-controller;
interrupt-parent = <&cpu_intc>;
interrupts = < 24 >;
};
memory {
#address-cells = <1>;
#size-cells = <1>;
ranges = <0x00000000 0x80000000 0x40000000>;
device_type = "memory";
reg = <0x00000000 0x20000000>; /* 512MiB */
};
};

126
arch/arc/boot/dts/axc003_idu.dtsi Normal file
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@ -0,0 +1,126 @@
/*
* Copyright (C) 2014, 2015 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/*
* Device tree for AXC003 CPU card: HS38x2 (Dual Core) with IDU intc
*/
/ {
compatible = "snps,arc";
clock-frequency = <75000000>;
#address-cells = <1>;
#size-cells = <1>;
cpu_card {
compatible = "simple-bus";
#address-cells = <1>;
#size-cells = <1>;
ranges = <0x00000000 0xf0000000 0x10000000>;
cpu_intc: archs-intc@cpu {
compatible = "snps,archs-intc";
interrupt-controller;
#interrupt-cells = <1>;
};
idu_intc: idu-interrupt-controller {
compatible = "snps,archs-idu-intc";
interrupt-controller;
interrupt-parent = <&cpu_intc>;
/*
* <hwirq distribution>
* distribution: 0=RR; 1=cpu0, 2=cpu1, 4=cpu2, 8=cpu3
*/
#interrupt-cells = <2>;
/*
* upstream irqs to core intc - downstream these are
* "COMMON" irq 0,1..
*/
interrupts = <24 25>;
};
/*
* this GPIO block ORs all interrupts on CPU card (creg,..)
* to uplink only 1 IRQ to ARC core intc
*/
dw-apb-gpio@0x2000 {
compatible = "snps,dw-apb-gpio";
reg = < 0x2000 0x80 >;
#address-cells = <1>;
#size-cells = <0>;
ictl_intc: gpio-controller@0 {
compatible = "snps,dw-apb-gpio-port";
gpio-controller;
#gpio-cells = <2>;
snps,nr-gpios = <30>;
reg = <0>;
interrupt-controller;
#interrupt-cells = <2>;
interrupt-parent = <&idu_intc>;
/*
* cmn irq 1 -> cpu irq 25
* Distribute to cpu0 only
*/
interrupts = <1 1>;
};
};
debug_uart: dw-apb-uart@0x5000 {
compatible = "snps,dw-apb-uart";
reg = <0x5000 0x100>;
clock-frequency = <33333000>;
interrupt-parent = <&ictl_intc>;
interrupts = <2 4>;
baud = <115200>;
reg-shift = <2>;
reg-io-width = <4>;
};
arcpct0: pct {
compatible = "snps,archs-pct";
#interrupt-cells = <1>;
interrupt-parent = <&cpu_intc>;
interrupts = <20>;
};
};
/*
* This INTC is actually connected to DW APB GPIO
* which acts as a wire between MB INTC and CPU INTC.
* GPIO INTC is configured in platform init code
* and here we mimic direct connection from MB INTC to
* CPU INTC, thus we set "interrupts = <0 1>" instead of
* "interrupts = <12>"
*
* This intc actually resides on MB, but we move it here to
* avoid duplicating the MB dtsi file given that IRQ from
* this intc to cpu intc are different for axs101 and axs103
*/
mb_intc: dw-apb-ictl@0xe0012000 {
#interrupt-cells = <1>;
compatible = "snps,dw-apb-ictl";
reg = < 0xe0012000 0x200 >;
interrupt-controller;
interrupt-parent = <&idu_intc>;
interrupts = <0 1>; /* cmn irq 0 -> cpu irq 24
distribute to cpu0 only */
};
memory {
#address-cells = <1>;
#size-cells = <1>;
ranges = <0x00000000 0x80000000 0x40000000>;
device_type = "memory";
reg = <0x00000000 0x20000000>; /* 512MiB */
};
};

21
arch/arc/boot/dts/axs101.dts Normal file
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@ -0,0 +1,21 @@
/*
* Copyright (C) 2013-15 Synopsys, Inc. (www.synopsys.com)
*
* ARC AXS101 S/W development platform
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/dts-v1/;
/include/ "axc001.dtsi"
/include/ "axs10x_mb.dtsi"
/ {
compatible = "snps,axs101", "snps,arc-sdp";
chosen {
bootargs = "earlycon=uart8250,mmio32,0xe0022000,115200n8 console=tty0 console=ttyS3,115200n8 consoleblank=0";
};
};

24
arch/arc/boot/dts/axs103.dts Normal file
View file

@ -0,0 +1,24 @@
/*
* Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/*
* Device Tree for AXS103 SDP with AXS10X Main Board and
* AXC003 FPGA Card (with UP bitfile)
*/
/dts-v1/;
/include/ "axc003.dtsi"
/include/ "axs10x_mb.dtsi"
/ {
compatible = "snps,axs103", "snps,arc-sdp";
chosen {
bootargs = "earlycon=uart8250,mmio32,0xe0022000,115200n8 console=ttyS3,115200n8 debug print-fatal-signals=1";
};
};

24
arch/arc/boot/dts/axs103_idu.dts Normal file
View file

@ -0,0 +1,24 @@
/*
* Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/*
* Device Tree for AXS103 SDP with AXS10X Main Board and
* AXC003 FPGA Card (with SMP bitfile)
*/
/dts-v1/;
/include/ "axc003_idu.dtsi"
/include/ "axs10x_mb.dtsi"
/ {
compatible = "snps,axs103", "snps,arc-sdp";
chosen {
bootargs = "earlycon=uart8250,mmio32,0xe0022000,115200n8 console=ttyS3,115200n8 debug print-fatal-signals=1";
};
};

224
arch/arc/boot/dts/axs10x_mb.dtsi Normal file
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@ -0,0 +1,224 @@
/*
* Support for peripherals on the AXS10x mainboard
*
* Copyright (C) 2013-15 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/ {
axs10x_mb {
compatible = "simple-bus";
#address-cells = <1>;
#size-cells = <1>;
ranges = <0x00000000 0xe0000000 0x10000000>;
interrupt-parent = <&mb_intc>;
clocks {
i2cclk: i2cclk {
compatible = "fixed-clock";
clock-frequency = <50000000>;
#clock-cells = <0>;
};
apbclk: apbclk {
compatible = "fixed-clock";
clock-frequency = <50000000>;
#clock-cells = <0>;
};
mmcclk: mmcclk {
compatible = "fixed-clock";
clock-frequency = <50000000>;
#clock-cells = <0>;
};
};
ethernet@0x18000 {
#interrupt-cells = <1>;
compatible = "snps,dwmac";
reg = < 0x18000 0x2000 >;
interrupts = < 4 >;
interrupt-names = "macirq";
phy-mode = "rgmii";
snps,pbl = < 32 >;
clocks = <&apbclk>;
clock-names = "stmmaceth";
};
ehci@0x40000 {
compatible = "generic-ehci";
reg = < 0x40000 0x100 >;
interrupts = < 8 >;
};
ohci@0x60000 {
compatible = "generic-ohci";
reg = < 0x60000 0x100 >;
interrupts = < 8 >;
};
/*
* According to DW Mobile Storage databook it is required
* to use "Hold Register" if card is enumerated in SDR12 or
* SDR25 modes.
*
* Utilization of "Hold Register" is already implemented via
* dw_mci_pltfm_prepare_command() which in its turn gets
* used through dw_mci_drv_data->prepare_command call-back.
* This call-back is used in Altera Socfpga platform and so
* we may reuse it saying that we're compatible with their
* "altr,socfpga-dw-mshc".
*
* Most probably "Hold Register" utilization is platform-
* independent requirement which means that single unified
* "snps,dw-mshc" should be enough for all users of DW MMC once
* dw_mci_pltfm_prepare_command() is used in generic platform
* code.
*/
mmc@0x15000 {
compatible = "altr,socfpga-dw-mshc";
reg = < 0x15000 0x400 >;
num-slots = < 1 >;
fifo-depth = < 16 >;
card-detect-delay = < 200 >;
clocks = <&apbclk>, <&mmcclk>;
clock-names = "biu", "ciu";
interrupts = < 7 >;
bus-width = < 4 >;
};
uart@0x20000 {
compatible = "snps,dw-apb-uart";
reg = <0x20000 0x100>;
clock-frequency = <33333333>;
interrupts = <17>;
baud = <115200>;
reg-shift = <2>;
reg-io-width = <4>;
};
uart@0x21000 {
compatible = "snps,dw-apb-uart";
reg = <0x21000 0x100>;
clock-frequency = <33333333>;
interrupts = <18>;
baud = <115200>;
reg-shift = <2>;
reg-io-width = <4>;
};
/* UART muxed with USB data port (ttyS3) */
uart@0x22000 {
compatible = "snps,dw-apb-uart";
reg = <0x22000 0x100>;
clock-frequency = <33333333>;
interrupts = <19>;
baud = <115200>;
reg-shift = <2>;
reg-io-width = <4>;
};
i2c@0x1d000 {
compatible = "snps,designware-i2c";
reg = <0x1d000 0x100>;
clock-frequency = <400000>;
clocks = <&i2cclk>;
interrupts = <14>;
};
i2c@0x1e000 {
compatible = "snps,designware-i2c";
reg = <0x1e000 0x100>;
clock-frequency = <400000>;
clocks = <&i2cclk>;
interrupts = <15>;
};
i2c@0x1f000 {
compatible = "snps,designware-i2c";
#address-cells = <1>;
#size-cells = <0>;
reg = <0x1f000 0x100>;
clock-frequency = <400000>;
clocks = <&i2cclk>;
interrupts = <16>;
eeprom@0x54{
compatible = "24c01";
reg = <0x54>;
pagesize = <0x8>;
};
eeprom@0x57{
compatible = "24c04";
reg = <0x57>;
pagesize = <0x8>;
};
};
gpio0:gpio@13000 {
compatible = "snps,dw-apb-gpio";
reg = <0x13000 0x1000>;
#address-cells = <1>;
#size-cells = <0>;
gpio0_banka: gpio-controller@0 {
compatible = "snps,dw-apb-gpio-port";
gpio-controller;
#gpio-cells = <2>;
snps,nr-gpios = <32>;
reg = <0>;
};
gpio0_bankb: gpio-controller@1 {
compatible = "snps,dw-apb-gpio-port";
gpio-controller;
#gpio-cells = <2>;
snps,nr-gpios = <8>;
reg = <1>;
};
gpio0_bankc: gpio-controller@2 {
compatible = "snps,dw-apb-gpio-port";
gpio-controller;
#gpio-cells = <2>;
snps,nr-gpios = <8>;
reg = <2>;
};
};
gpio1:gpio@14000 {
compatible = "snps,dw-apb-gpio";
reg = <0x14000 0x1000>;
#address-cells = <1>;
#size-cells = <0>;
gpio1_banka: gpio-controller@0 {
compatible = "snps,dw-apb-gpio-port";
gpio-controller;
#gpio-cells = <2>;
snps,nr-gpios = <30>;
reg = <0>;
};
gpio1_bankb: gpio-controller@1 {
compatible = "snps,dw-apb-gpio-port";
gpio-controller;
#gpio-cells = <2>;
snps,nr-gpios = <10>;
reg = <1>;
};
gpio1_bankc: gpio-controller@2 {
compatible = "snps,dw-apb-gpio-port";
gpio-controller;
#gpio-cells = <2>;
snps,nr-gpios = <8>;
reg = <2>;
};
};
};
};

2
arch/arc/boot/dts/angel4.dts → arch/arc/boot/dts/nsim_700.dts
View file

@ -10,7 +10,7 @@
/include/ "skeleton.dtsi"
/ {
compatible = "snps,arc-angel4";
compatible = "snps,nsim";
clock-frequency = <80000000>; /* 80 MHZ */
#address-cells = <1>;
#size-cells = <1>;

53
arch/arc/boot/dts/nsim_hs.dts Normal file
View file

@ -0,0 +1,53 @@
/*
* Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/dts-v1/;
/include/ "skeleton.dtsi"
/ {
compatible = "snps,nsim_hs";
interrupt-parent = <&core_intc>;
chosen {
bootargs = "earlycon=arc_uart,mmio32,0xc0fc1000,115200n8 console=ttyARC0,115200n8";
};
aliases {
serial0 = &arcuart0;
};
fpga {
compatible = "simple-bus";
#address-cells = <1>;
#size-cells = <1>;
/* child and parent address space 1:1 mapped */
ranges;
core_intc: core-interrupt-controller {
compatible = "snps,archs-intc";
interrupt-controller;
#interrupt-cells = <1>;
};
arcuart0: serial@c0fc1000 {
compatible = "snps,arc-uart";
reg = <0xc0fc1000 0x100>;
interrupts = <24>;
clock-frequency = <80000000>;
current-speed = <115200>;
status = "okay";
};
arcpct0: pct {
compatible = "snps,archs-pct";
#interrupt-cells = <1>;
interrupts = <20>;
};
};
};

72
arch/arc/boot/dts/nsim_hs_idu.dts Normal file
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@ -0,0 +1,72 @@
/*
* Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/dts-v1/;
/include/ "skeleton.dtsi"
/ {
compatible = "snps,nsim_hs";
interrupt-parent = <&core_intc>;
chosen {
bootargs = "earlycon=arc_uart,mmio32,0xc0fc1000,115200n8 console=ttyARC0,115200n8";
};
aliases {
serial0 = &arcuart0;
};
fpga {
compatible = "simple-bus";
#address-cells = <1>;
#size-cells = <1>;
/* child and parent address space 1:1 mapped */
ranges;
core_intc: core-interrupt-controller {
compatible = "snps,archs-intc";
interrupt-controller;
#interrupt-cells = <1>;
};
idu_intc: idu-interrupt-controller {
compatible = "snps,archs-idu-intc";
interrupt-controller;
interrupt-parent = <&core_intc>;
/*
* <hwirq distribution>
* distribution: 0=RR; 1=cpu0, 2=cpu1, 4=cpu2, 8=cpu3
*/
#interrupt-cells = <2>;
/*
* upstream irqs to core intc - downstream these are
* "COMMON" irq 0,1..
*/
interrupts = <24 25 26 27 28 29 30 31>;
};
arcuart0: serial@c0fc1000 {
compatible = "snps,arc-uart";
reg = <0xc0fc1000 0x100>;
interrupt-parent = <&idu_intc>;
interrupts = <0 0>;
clock-frequency = <80000000>;
current-speed = <115200>;
status = "okay";
};
arcpct0: pct {
compatible = "snps,archs-pct";
#interrupt-cells = <1>;
interrupts = <20>;
};
};
};

80
arch/arc/boot/dts/nsimosci_hs.dts Normal file
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@ -0,0 +1,80 @@
/*
* Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/dts-v1/;
/include/ "skeleton.dtsi"
/ {
compatible = "snps,nsimosci_hs";
clock-frequency = <20000000>; /* 20 MHZ */
#address-cells = <1>;
#size-cells = <1>;
interrupt-parent = <&core_intc>;
chosen {
/* this is for console on PGU */
/* bootargs = "console=tty0 consoleblank=0"; */
/* this is for console on serial */
bootargs = "earlycon=uart8250,mmio32,0xf0000000,115200n8 console=tty0 console=ttyS0,115200n8 consoleblank=0 debug";
};
aliases {
serial0 = &uart0;
};
fpga {
compatible = "simple-bus";
#address-cells = <1>;
#size-cells = <1>;
/* child and parent address space 1:1 mapped */
ranges;
core_intc: core-interrupt-controller {
compatible = "snps,archs-intc";
interrupt-controller;
#interrupt-cells = <1>;
};
uart0: serial@f0000000 {
compatible = "ns8250";
reg = <0xf0000000 0x2000>;
interrupts = <24>;
clock-frequency = <3686400>;
baud = <115200>;
reg-shift = <2>;
reg-io-width = <4>;
no-loopback-test = <1>;
};
pgu0: pgu@f9000000 {
compatible = "snps,arcpgufb";
reg = <0xf9000000 0x400>;
};
ps2: ps2@f9001000 {
compatible = "snps,arc_ps2";
reg = <0xf9000400 0x14>;
interrupts = <27>;
interrupt-names = "arc_ps2_irq";
};
eth0: ethernet@f0003000 {
compatible = "snps,oscilan";
reg = <0xf0003000 0x44>;
interrupts = <25>, <26>;
interrupt-names = "rx", "tx";
};
arcpct0: pct {
compatible = "snps,archs-pct";
#interrupt-cells = <1>;
interrupts = <20>;
};
};
};

101
arch/arc/boot/dts/nsimosci_hs_idu.dts Normal file
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@ -0,0 +1,101 @@
/*
* Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/dts-v1/;
/include/ "skeleton.dtsi"
/ {
compatible = "snps,nsimosci_hs";
clock-frequency = <5000000>; /* 5 MHZ */
#address-cells = <1>;
#size-cells = <1>;
interrupt-parent = <&core_intc>;
chosen {
/* this is for console on serial */
bootargs = "earlycon=uart8250,mmio32,0xf0000000,115200n8 console=tty0 console=ttyS0,115200n8 consoleblan=0 debug";
};
aliases {
serial0 = &uart0;
};
fpga {
compatible = "simple-bus";
#address-cells = <1>;
#size-cells = <1>;
/* child and parent address space 1:1 mapped */
ranges;
core_intc: core-interrupt-controller {
compatible = "snps,archs-intc";
interrupt-controller;
#interrupt-cells = <1>;
/* interrupts = <16 17 18 19 20 21 22 23 24 25>; */
};
idu_intc: idu-interrupt-controller {
compatible = "snps,archs-idu-intc";
interrupt-controller;
interrupt-parent = <&core_intc>;
/*
* <hwirq distribution>
* distribution: 0=RR; 1=cpu0, 2=cpu1, 4=cpu2, 8=cpu3
*/
#interrupt-cells = <2>;
/*
* upstream irqs to core intc - downstream these are
* "COMMON" irq 0,1..
*/
interrupts = <24 25 26 27 28 29 30 31>;
};
uart0: serial@f0000000 {
compatible = "ns8250";
reg = <0xf0000000 0x2000>;
interrupt-parent = <&idu_intc>;
interrupts = <0 0>; /* cmn irq 0 -> cpu irq 24
RR distribute to all cpus */
clock-frequency = <3686400>;
baud = <115200>;
reg-shift = <2>;
reg-io-width = <4>;
no-loopback-test = <1>;
};
pgu0: pgu@f9000000 {
compatible = "snps,arcpgufb";
reg = <0xf9000000 0x400>;
};
ps2: ps2@f9001000 {
compatible = "snps,arc_ps2";
reg = <0xf9000400 0x14>;
interrupts = <3 0>;
interrupt-parent = <&idu_intc>;
interrupt-names = "arc_ps2_irq";
};
eth0: ethernet@f0003000 {
compatible = "snps,oscilan";
reg = <0xf0003000 0x44>;
interrupt-parent = <&idu_intc>;
interrupts = <1 2>, <2 2>;
interrupt-names = "rx", "tx";
};
arcpct0: pct {
compatible = "snps,archs-pct";
#interrupt-cells = <1>;
interrupts = <20>;
};
};
};

61
arch/arc/boot/dts/vdk_axc003.dtsi Normal file
View file

@ -0,0 +1,61 @@
/*
* Copyright (C) 2013, 2014 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/*
* Device tree for AXC003 CPU card: HS38x UP configuration (VDK version)
*/
/ {
compatible = "snps,arc";
clock-frequency = <50000000>;
#address-cells = <1>;
#size-cells = <1>;
cpu_card {
compatible = "simple-bus";
#address-cells = <1>;
#size-cells = <1>;
ranges = <0x00000000 0xf0000000 0x10000000>;
cpu_intc: archs-intc@cpu {
compatible = "snps,archs-intc";
interrupt-controller;
#interrupt-cells = <1>;
};
debug_uart: dw-apb-uart@0x5000 {
compatible = "snps,dw-apb-uart";
reg = <0x5000 0x100>;
clock-frequency = <2403200>;
interrupt-parent = <&cpu_intc>;
interrupts = <19>;
baud = <115200>;
reg-shift = <2>;
reg-io-width = <4>;
};
};
mb_intc: dw-apb-ictl@0xe0012000 {
#interrupt-cells = <1>;
compatible = "snps,dw-apb-ictl";
reg = < 0xe0012000 0x200 >;
interrupt-controller;
interrupt-parent = <&cpu_intc>;
interrupts = < 18 >;
};
memory {
#address-cells = <1>;
#size-cells = <1>;
ranges = <0x00000000 0x80000000 0x40000000>;
device_type = "memory";
reg = <0x00000000 0x20000000>; /* 512MiB */
};
};

76
arch/arc/boot/dts/vdk_axc003_idu.dtsi Normal file
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@ -0,0 +1,76 @@
/*
* Copyright (C) 2014, 2015 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/*
* Device tree for AXC003 CPU card:
* HS38x2 (Dual Core) with IDU intc (VDK version)
*/
/ {
compatible = "snps,arc";
clock-frequency = <50000000>;
#address-cells = <1>;
#size-cells = <1>;
cpu_card {
compatible = "simple-bus";
#address-cells = <1>;
#size-cells = <1>;
ranges = <0x00000000 0xf0000000 0x10000000>;
cpu_intc: archs-intc@cpu {
compatible = "snps,archs-intc";
interrupt-controller;
#interrupt-cells = <1>;
};
idu_intc: idu-interrupt-controller {
compatible = "snps,archs-idu-intc";
interrupt-controller;
interrupt-parent = <&cpu_intc>;
/*
* <hwirq distribution>
* distribution: 0=RR; 1=cpu0, 2=cpu1, 4=cpu2, 8=cpu3
*/
#interrupt-cells = <2>;
interrupts = <24 25 26 27>;
};
debug_uart: dw-apb-uart@0x5000 {
compatible = "snps,dw-apb-uart";
reg = <0x5000 0x100>;
clock-frequency = <2403200>;
interrupt-parent = <&idu_intc>;
interrupts = <2 0>;
baud = <115200>;
reg-shift = <2>;
reg-io-width = <4>;
};
};
mb_intc: dw-apb-ictl@0xe0012000 {
#interrupt-cells = <1>;
compatible = "snps,dw-apb-ictl";
reg = < 0xe0012000 0x200 >;
interrupt-controller;
interrupt-parent = <&idu_intc>;
interrupts = < 0 0 >;
};
memory {
#address-cells = <1>;
#size-cells = <1>;
ranges = <0x00000000 0x80000000 0x40000000>;
device_type = "memory";
reg = <0x00000000 0x20000000>; /* 512MiB */
};
};

93
arch/arc/boot/dts/vdk_axs10x_mb.dtsi Normal file
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@ -0,0 +1,93 @@
/*
* Support for peripherals on the AXS10x mainboard (VDK version)
*
* Copyright (C) 2013-15 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/ {
axs10x_mb_vdk {
compatible = "simple-bus";
#address-cells = <1>;
#size-cells = <1>;
ranges = <0x00000000 0xe0000000 0x10000000>;
interrupt-parent = <&mb_intc>;
clocks {
apbclk: apbclk {
compatible = "fixed-clock";
clock-frequency = <50000000>;
#clock-cells = <0>;
};
};
ethernet@0x18000 {
#interrupt-cells = <1>;
compatible = "snps,dwmac";
reg = < 0x18000 0x2000 >;
interrupts = < 4 >;
interrupt-names = "macirq";
phy-mode = "rgmii";
snps,phy-addr = < 0 >; // VDK model phy address is 0
snps,pbl = < 32 >;
clocks = <&apbclk>;
clock-names = "stmmaceth";
};
ehci@0x40000 {
compatible = "generic-ehci";
reg = < 0x40000 0x100 >;
interrupts = < 8 >;
};
uart@0x20000 {
compatible = "snps,dw-apb-uart";
reg = <0x20000 0x100>;
clock-frequency = <2403200>;
interrupts = <17>;
baud = <115200>;
reg-shift = <2>;
reg-io-width = <4>;
};
uart@0x21000 {
compatible = "snps,dw-apb-uart";
reg = <0x21000 0x100>;
clock-frequency = <2403200>;
interrupts = <18>;
baud = <115200>;
reg-shift = <2>;
reg-io-width = <4>;
};
uart@0x22000 {
compatible = "snps,dw-apb-uart";
reg = <0x22000 0x100>;
clock-frequency = <2403200>;
interrupts = <19>;
baud = <115200>;
reg-shift = <2>;
reg-io-width = <4>;
};
/* PGU output directly sent to virtual LCD screen; hdmi controller not modelled */
pgu@0x17000 {
compatible = "snps,arcpgufb";
reg = <0x17000 0x400>;
clock-frequency = <51000000>; /* PGU'clock is initated in init function */
/* interrupts = <5>; PGU interrupts not used, this vector is used for ps2 below */
};
/* VDK has additional ps2 keyboard/mouse interface integrated in LCD screen model */
ps2: ps2@e0017400 {
compatible = "snps,arc_ps2";
reg = <0x17400 0x14>;
interrupts = <5>;
interrupt-names = "arc_ps2_irq";
};
};
};

21
arch/arc/boot/dts/vdk_hs38.dts Normal file
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@ -0,0 +1,21 @@
/*
* Copyright (C) 2013 Synopsys, Inc. (www.synopsys.com)
*
* ARC HS38 Virtual Development Kit (VDK)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/dts-v1/;
/include/ "vdk_axc003.dtsi"
/include/ "vdk_axs10x_mb.dtsi"
/ {
compatible = "snps,axs103";
chosen {
bootargs = "earlycon=uart8250,mmio32,0xe0022000,115200n8 console=tty0 console=ttyS3,115200n8 consoleblank=0";
};
};

21
arch/arc/boot/dts/vdk_hs38_smp.dts Normal file
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@ -0,0 +1,21 @@
/*
* Copyright (C) 2013 Synopsys, Inc. (www.synopsys.com)
*
* ARC HS38 Virtual Development Kit, SMP version (VDK)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/dts-v1/;
/include/ "vdk_axc003_idu.dtsi"
/include/ "vdk_axs10x_mb.dtsi"
/ {
compatible = "snps,axs103";
chosen {
bootargs = "earlycon=uart8250,mmio32,0xe0022000,115200n8 console=tty0 console=ttyS3,115200n8 consoleblank=0";
};
};

111
arch/arc/configs/axs101_defconfig Normal file
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@ -0,0 +1,111 @@
CONFIG_CROSS_COMPILE="arc-linux-uclibc-"
CONFIG_DEFAULT_HOSTNAME="ARCLinux"
# CONFIG_SWAP is not set
CONFIG_SYSVIPC=y
CONFIG_POSIX_MQUEUE=y
# CONFIG_CROSS_MEMORY_ATTACH is not set
CONFIG_NO_HZ_IDLE=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_NAMESPACES=y
# CONFIG_UTS_NS is not set
# CONFIG_PID_NS is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE="../arc_initramfs/"
CONFIG_EMBEDDED=y
CONFIG_PERF_EVENTS=y
# CONFIG_VM_EVENT_COUNTERS is not set
# CONFIG_SLUB_DEBUG is not set
# CONFIG_COMPAT_BRK is not set
CONFIG_MODULES=y
CONFIG_PARTITION_ADVANCED=y
CONFIG_ARC_PLAT_AXS10X=y
CONFIG_AXS101=y
CONFIG_ARC_CACHE_LINE_SHIFT=5
CONFIG_ARC_BUILTIN_DTB_NAME="axs101"
CONFIG_PREEMPT=y
# CONFIG_COMPACTION is not set
CONFIG_NET=y
CONFIG_PACKET=y
CONFIG_UNIX=y
CONFIG_NET_KEY=y
CONFIG_INET=y
CONFIG_IP_PNP=y
CONFIG_IP_PNP_DHCP=y
CONFIG_IP_PNP_BOOTP=y
CONFIG_IP_PNP_RARP=y
# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
# CONFIG_INET_XFRM_MODE_TUNNEL is not set
# CONFIG_INET_XFRM_MODE_BEET is not set
# CONFIG_IPV6 is not set
# CONFIG_STANDALONE is not set
# CONFIG_PREVENT_FIRMWARE_BUILD is not set
# CONFIG_FIRMWARE_IN_KERNEL is not set
CONFIG_SCSI=y
CONFIG_BLK_DEV_SD=y
CONFIG_NETDEVICES=y
# CONFIG_NET_VENDOR_ARC is not set
# CONFIG_NET_VENDOR_BROADCOM is not set
# CONFIG_NET_VENDOR_INTEL is not set
# CONFIG_NET_VENDOR_MARVELL is not set
# CONFIG_NET_VENDOR_MICREL is not set
# CONFIG_NET_VENDOR_NATSEMI is not set
# CONFIG_NET_VENDOR_SEEQ is not set
CONFIG_STMMAC_ETH=y
# CONFIG_NET_VENDOR_VIA is not set
# CONFIG_NET_VENDOR_WIZNET is not set
CONFIG_NATIONAL_PHY=y
# CONFIG_USB_NET_DRIVERS is not set
CONFIG_INPUT_EVDEV=y
CONFIG_MOUSE_PS2_TOUCHKIT=y
CONFIG_MOUSE_SERIAL=y
CONFIG_MOUSE_SYNAPTICS_USB=y
# CONFIG_LEGACY_PTYS is not set
# CONFIG_DEVKMEM is not set
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_8250_DW=y
CONFIG_SERIAL_OF_PLATFORM=y
# CONFIG_HW_RANDOM is not set
CONFIG_I2C=y
CONFIG_I2C_CHARDEV=y
CONFIG_I2C_DESIGNWARE_PLATFORM=y
# CONFIG_HWMON is not set
CONFIG_FB=y
# CONFIG_VGA_CONSOLE is not set
CONFIG_FRAMEBUFFER_CONSOLE=y
CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
CONFIG_LOGO=y
# CONFIG_LOGO_LINUX_MONO is not set
# CONFIG_LOGO_LINUX_VGA16 is not set
# CONFIG_LOGO_LINUX_CLUT224 is not set
CONFIG_USB_EHCI_HCD=y
CONFIG_USB_EHCI_HCD_PLATFORM=y
CONFIG_USB_OHCI_HCD=y
CONFIG_USB_OHCI_HCD_PLATFORM=y
CONFIG_USB_STORAGE=y
CONFIG_MMC=y
CONFIG_MMC_SDHCI=y
CONFIG_MMC_SDHCI_PLTFM=y
CONFIG_MMC_DW=y
CONFIG_MMC_DW_IDMAC=y
# CONFIG_IOMMU_SUPPORT is not set
CONFIG_EXT3_FS=y
CONFIG_EXT4_FS=y
CONFIG_MSDOS_FS=y
CONFIG_VFAT_FS=y
CONFIG_NTFS_FS=y
CONFIG_TMPFS=y
CONFIG_JFFS2_FS=y
CONFIG_NFS_FS=y
CONFIG_NLS_CODEPAGE_437=y
CONFIG_NLS_ISO8859_1=y
# CONFIG_ENABLE_WARN_DEPRECATED is not set
# CONFIG_ENABLE_MUST_CHECK is not set
CONFIG_STRIP_ASM_SYMS=y
CONFIG_LOCKUP_DETECTOR=y
CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=10
# CONFIG_SCHED_DEBUG is not set
# CONFIG_DEBUG_PREEMPT is not set
# CONFIG_FTRACE is not set

117
arch/arc/configs/axs103_defconfig Normal file
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@ -0,0 +1,117 @@
CONFIG_CROSS_COMPILE="arc-linux-uclibc-"
CONFIG_DEFAULT_HOSTNAME="ARCLinux"
# CONFIG_SWAP is not set
CONFIG_SYSVIPC=y
CONFIG_POSIX_MQUEUE=y
# CONFIG_CROSS_MEMORY_ATTACH is not set
CONFIG_NO_HZ_IDLE=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_NAMESPACES=y
# CONFIG_UTS_NS is not set
# CONFIG_PID_NS is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE="../../arc_initramfs_hs/"
CONFIG_EMBEDDED=y
CONFIG_PERF_EVENTS=y
# CONFIG_VM_EVENT_COUNTERS is not set
# CONFIG_SLUB_DEBUG is not set
# CONFIG_COMPAT_BRK is not set
CONFIG_MODULES=y
CONFIG_PARTITION_ADVANCED=y
CONFIG_ARC_PLAT_AXS10X=y
CONFIG_AXS103=y
CONFIG_ISA_ARCV2=y
CONFIG_ARC_BUILTIN_DTB_NAME="axs103"
CONFIG_PREEMPT=y
# CONFIG_COMPACTION is not set
CONFIG_NET=y
CONFIG_PACKET=y
CONFIG_UNIX=y
CONFIG_NET_KEY=y
CONFIG_INET=y
CONFIG_IP_PNP=y
CONFIG_IP_PNP_DHCP=y
CONFIG_IP_PNP_BOOTP=y
CONFIG_IP_PNP_RARP=y
# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
# CONFIG_INET_XFRM_MODE_TUNNEL is not set
# CONFIG_INET_XFRM_MODE_BEET is not set
# CONFIG_IPV6 is not set
# CONFIG_STANDALONE is not set
# CONFIG_PREVENT_FIRMWARE_BUILD is not set
# CONFIG_FIRMWARE_IN_KERNEL is not set
CONFIG_MTD=y
CONFIG_MTD_CMDLINE_PARTS=y
CONFIG_MTD_BLOCK=y
CONFIG_MTD_NAND=y
CONFIG_MTD_NAND_AXS=y
CONFIG_SCSI=y
CONFIG_BLK_DEV_SD=y
CONFIG_NETDEVICES=y
# CONFIG_NET_VENDOR_ARC is not set
# CONFIG_NET_VENDOR_BROADCOM is not set
# CONFIG_NET_VENDOR_INTEL is not set
# CONFIG_NET_VENDOR_MARVELL is not set
# CONFIG_NET_VENDOR_MICREL is not set
# CONFIG_NET_VENDOR_NATSEMI is not set
# CONFIG_NET_VENDOR_SEEQ is not set
CONFIG_STMMAC_ETH=y
# CONFIG_NET_VENDOR_VIA is not set
# CONFIG_NET_VENDOR_WIZNET is not set
CONFIG_NATIONAL_PHY=y
# CONFIG_USB_NET_DRIVERS is not set
CONFIG_INPUT_EVDEV=y
CONFIG_MOUSE_PS2_TOUCHKIT=y
CONFIG_MOUSE_SERIAL=y
CONFIG_MOUSE_SYNAPTICS_USB=y
# CONFIG_LEGACY_PTYS is not set
# CONFIG_DEVKMEM is not set
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_8250_DW=y
CONFIG_SERIAL_OF_PLATFORM=y
# CONFIG_HW_RANDOM is not set
CONFIG_I2C=y
CONFIG_I2C_CHARDEV=y
CONFIG_I2C_DESIGNWARE_PLATFORM=y
# CONFIG_HWMON is not set
CONFIG_FB=y
# CONFIG_VGA_CONSOLE is not set
CONFIG_FRAMEBUFFER_CONSOLE=y
CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
CONFIG_LOGO=y
# CONFIG_LOGO_LINUX_MONO is not set
# CONFIG_LOGO_LINUX_VGA16 is not set
# CONFIG_LOGO_LINUX_CLUT224 is not set
CONFIG_USB=y
CONFIG_USB_EHCI_HCD=y
CONFIG_USB_EHCI_HCD_PLATFORM=y
CONFIG_USB_OHCI_HCD=y
CONFIG_USB_OHCI_HCD_PLATFORM=y
CONFIG_USB_STORAGE=y
CONFIG_MMC=y
CONFIG_MMC_SDHCI=y
CONFIG_MMC_SDHCI_PLTFM=y
CONFIG_MMC_DW=y
CONFIG_MMC_DW_IDMAC=y
# CONFIG_IOMMU_SUPPORT is not set
CONFIG_EXT3_FS=y
CONFIG_EXT4_FS=y
CONFIG_MSDOS_FS=y
CONFIG_VFAT_FS=y
CONFIG_NTFS_FS=y
CONFIG_TMPFS=y
CONFIG_JFFS2_FS=y
CONFIG_NFS_FS=y
CONFIG_NLS_CODEPAGE_437=y
CONFIG_NLS_ISO8859_1=y
# CONFIG_ENABLE_WARN_DEPRECATED is not set
# CONFIG_ENABLE_MUST_CHECK is not set
CONFIG_STRIP_ASM_SYMS=y
CONFIG_LOCKUP_DETECTOR=y
CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=10
# CONFIG_SCHED_DEBUG is not set
# CONFIG_DEBUG_PREEMPT is not set
# CONFIG_FTRACE is not set

118
arch/arc/configs/axs103_smp_defconfig Normal file
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@ -0,0 +1,118 @@
CONFIG_CROSS_COMPILE="arc-linux-uclibc-"
CONFIG_DEFAULT_HOSTNAME="ARCLinux"
# CONFIG_SWAP is not set
CONFIG_SYSVIPC=y
CONFIG_POSIX_MQUEUE=y
# CONFIG_CROSS_MEMORY_ATTACH is not set
CONFIG_NO_HZ_IDLE=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_NAMESPACES=y
# CONFIG_UTS_NS is not set
# CONFIG_PID_NS is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE="../../arc_initramfs_hs/"
CONFIG_EMBEDDED=y
CONFIG_PERF_EVENTS=y
# CONFIG_VM_EVENT_COUNTERS is not set
# CONFIG_COMPAT_BRK is not set
CONFIG_SLAB=y
CONFIG_MODULES=y
CONFIG_PARTITION_ADVANCED=y
CONFIG_ARC_PLAT_AXS10X=y
CONFIG_AXS103=y
CONFIG_ISA_ARCV2=y
CONFIG_SMP=y
CONFIG_ARC_BUILTIN_DTB_NAME="axs103_idu"
CONFIG_PREEMPT=y
# CONFIG_COMPACTION is not set
CONFIG_NET=y
CONFIG_PACKET=y
CONFIG_UNIX=y
CONFIG_NET_KEY=y
CONFIG_INET=y
CONFIG_IP_PNP=y
CONFIG_IP_PNP_DHCP=y
CONFIG_IP_PNP_BOOTP=y
CONFIG_IP_PNP_RARP=y
# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
# CONFIG_INET_XFRM_MODE_TUNNEL is not set
# CONFIG_INET_XFRM_MODE_BEET is not set
# CONFIG_IPV6 is not set
# CONFIG_STANDALONE is not set
# CONFIG_PREVENT_FIRMWARE_BUILD is not set
# CONFIG_FIRMWARE_IN_KERNEL is not set
CONFIG_MTD=y
CONFIG_MTD_CMDLINE_PARTS=y
CONFIG_MTD_BLOCK=y
CONFIG_MTD_NAND=y
CONFIG_MTD_NAND_AXS=y
CONFIG_SCSI=y
CONFIG_BLK_DEV_SD=y
CONFIG_NETDEVICES=y
# CONFIG_NET_VENDOR_ARC is not set
# CONFIG_NET_VENDOR_BROADCOM is not set
# CONFIG_NET_VENDOR_INTEL is not set
# CONFIG_NET_VENDOR_MARVELL is not set
# CONFIG_NET_VENDOR_MICREL is not set
# CONFIG_NET_VENDOR_NATSEMI is not set
# CONFIG_NET_VENDOR_SEEQ is not set
CONFIG_STMMAC_ETH=y
# CONFIG_NET_VENDOR_VIA is not set
# CONFIG_NET_VENDOR_WIZNET is not set
CONFIG_NATIONAL_PHY=y
# CONFIG_USB_NET_DRIVERS is not set
CONFIG_INPUT_EVDEV=y
CONFIG_MOUSE_PS2_TOUCHKIT=y
CONFIG_MOUSE_SERIAL=y
CONFIG_MOUSE_SYNAPTICS_USB=y
# CONFIG_LEGACY_PTYS is not set
# CONFIG_DEVKMEM is not set
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_8250_DW=y
CONFIG_SERIAL_OF_PLATFORM=y
# CONFIG_HW_RANDOM is not set
CONFIG_I2C=y
CONFIG_I2C_CHARDEV=y
CONFIG_I2C_DESIGNWARE_PLATFORM=y
# CONFIG_HWMON is not set
CONFIG_FB=y
# CONFIG_VGA_CONSOLE is not set
CONFIG_FRAMEBUFFER_CONSOLE=y
CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
CONFIG_LOGO=y
# CONFIG_LOGO_LINUX_MONO is not set
# CONFIG_LOGO_LINUX_VGA16 is not set
# CONFIG_LOGO_LINUX_CLUT224 is not set
CONFIG_USB=y
CONFIG_USB_EHCI_HCD=y
CONFIG_USB_EHCI_HCD_PLATFORM=y
CONFIG_USB_OHCI_HCD=y
CONFIG_USB_OHCI_HCD_PLATFORM=y
CONFIG_USB_STORAGE=y
CONFIG_MMC=y
CONFIG_MMC_SDHCI=y
CONFIG_MMC_SDHCI_PLTFM=y
CONFIG_MMC_DW=y
CONFIG_MMC_DW_IDMAC=y
# CONFIG_IOMMU_SUPPORT is not set
CONFIG_EXT3_FS=y
CONFIG_EXT4_FS=y
CONFIG_MSDOS_FS=y
CONFIG_VFAT_FS=y
CONFIG_NTFS_FS=y
CONFIG_TMPFS=y
CONFIG_JFFS2_FS=y
CONFIG_NFS_FS=y
CONFIG_NLS_CODEPAGE_437=y
CONFIG_NLS_ISO8859_1=y
# CONFIG_ENABLE_WARN_DEPRECATED is not set
# CONFIG_ENABLE_MUST_CHECK is not set
CONFIG_STRIP_ASM_SYMS=y
CONFIG_LOCKUP_DETECTOR=y
CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=10
# CONFIG_SCHED_DEBUG is not set
# CONFIG_DEBUG_PREEMPT is not set
# CONFIG_FTRACE is not set

7
arch/arc/configs/nsim_700_defconfig
View file

@ -1,4 +1,4 @@
CONFIG_CROSS_COMPILE="arc-linux-uclibc-"
CONFIG_CROSS_COMPILE="arc-linux-"
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_DEFAULT_HOSTNAME="ARCLinux"
# CONFIG_SWAP is not set
@ -22,9 +22,8 @@ CONFIG_MODULES=y
# CONFIG_BLK_DEV_BSG is not set
# CONFIG_IOSCHED_DEADLINE is not set
# CONFIG_IOSCHED_CFQ is not set
CONFIG_ARC_PLAT_FPGA_LEGACY=y
# CONFIG_ARC_HAS_RTSC is not set
CONFIG_ARC_BUILTIN_DTB_NAME="angel4"
CONFIG_ARC_PLAT_SIM=y
CONFIG_ARC_BUILTIN_DTB_NAME="nsim_700"
CONFIG_PREEMPT=y
# CONFIG_COMPACTION is not set
# CONFIG_CROSS_MEMORY_ATTACH is not set

64
arch/arc/configs/nsim_hs_defconfig Normal file
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@ -0,0 +1,64 @@
CONFIG_CROSS_COMPILE="arc-linux-uclibc-"
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_DEFAULT_HOSTNAME="ARCLinux"
# CONFIG_SWAP is not set
CONFIG_SYSVIPC=y
CONFIG_POSIX_MQUEUE=y
# CONFIG_CROSS_MEMORY_ATTACH is not set
CONFIG_HIGH_RES_TIMERS=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_NAMESPACES=y
# CONFIG_UTS_NS is not set
# CONFIG_PID_NS is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE="../arc_initramfs_hs/"
CONFIG_KALLSYMS_ALL=y
CONFIG_EMBEDDED=y
# CONFIG_SLUB_DEBUG is not set
# CONFIG_COMPAT_BRK is not set
CONFIG_KPROBES=y
CONFIG_MODULES=y
# CONFIG_LBDAF is not set
# CONFIG_BLK_DEV_BSG is not set
# CONFIG_IOSCHED_DEADLINE is not set
# CONFIG_IOSCHED_CFQ is not set
CONFIG_ARC_PLAT_SIM=y
CONFIG_ISA_ARCV2=y
CONFIG_ARC_BUILTIN_DTB_NAME="nsim_hs"
CONFIG_PREEMPT=y
# CONFIG_COMPACTION is not set
CONFIG_NET=y
CONFIG_PACKET=y
CONFIG_UNIX=y
CONFIG_UNIX_DIAG=y
CONFIG_NET_KEY=y
CONFIG_INET=y
# CONFIG_IPV6 is not set
# CONFIG_STANDALONE is not set
# CONFIG_PREVENT_FIRMWARE_BUILD is not set
# CONFIG_FIRMWARE_IN_KERNEL is not set
# CONFIG_BLK_DEV is not set
# CONFIG_INPUT_MOUSEDEV_PSAUX is not set
# CONFIG_INPUT_KEYBOARD is not set
# CONFIG_INPUT_MOUSE is not set
# CONFIG_SERIO is not set
# CONFIG_LEGACY_PTYS is not set
# CONFIG_DEVKMEM is not set
CONFIG_SERIAL_ARC=y
CONFIG_SERIAL_ARC_CONSOLE=y
# CONFIG_HW_RANDOM is not set
# CONFIG_HWMON is not set
# CONFIG_VGA_CONSOLE is not set
# CONFIG_HID is not set
# CONFIG_USB_SUPPORT is not set
# CONFIG_IOMMU_SUPPORT is not set
CONFIG_EXT2_FS=y
CONFIG_EXT2_FS_XATTR=y
CONFIG_TMPFS=y
# CONFIG_MISC_FILESYSTEMS is not set
CONFIG_NFS_FS=y
# CONFIG_ENABLE_WARN_DEPRECATED is not set
# CONFIG_ENABLE_MUST_CHECK is not set
# CONFIG_DEBUG_PREEMPT is not set
CONFIG_XZ_DEC=y

63
arch/arc/configs/nsim_hs_smp_defconfig Normal file
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@ -0,0 +1,63 @@
CONFIG_CROSS_COMPILE="arc-linux-uclibc-"
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_DEFAULT_HOSTNAME="ARCLinux"
# CONFIG_SWAP is not set
CONFIG_HIGH_RES_TIMERS=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_NAMESPACES=y
# CONFIG_UTS_NS is not set
# CONFIG_PID_NS is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE="../arc_initramfs_hs/"
CONFIG_KALLSYMS_ALL=y
CONFIG_EMBEDDED=y
# CONFIG_SLUB_DEBUG is not set
# CONFIG_COMPAT_BRK is not set
CONFIG_KPROBES=y
CONFIG_MODULES=y
# CONFIG_LBDAF is not set
# CONFIG_BLK_DEV_BSG is not set
# CONFIG_IOSCHED_DEADLINE is not set
# CONFIG_IOSCHED_CFQ is not set
CONFIG_ARC_PLAT_SIM=y
CONFIG_ARC_BOARD_ML509=y
CONFIG_ISA_ARCV2=y
CONFIG_SMP=y
CONFIG_ARC_BUILTIN_DTB_NAME="nsim_hs_idu"
CONFIG_PREEMPT=y
# CONFIG_COMPACTION is not set
# CONFIG_CROSS_MEMORY_ATTACH is not set
CONFIG_NET=y
CONFIG_PACKET=y
CONFIG_UNIX=y
CONFIG_UNIX_DIAG=y
CONFIG_NET_KEY=y
CONFIG_INET=y
# CONFIG_IPV6 is not set
# CONFIG_STANDALONE is not set
# CONFIG_PREVENT_FIRMWARE_BUILD is not set
# CONFIG_FIRMWARE_IN_KERNEL is not set
# CONFIG_BLK_DEV is not set
# CONFIG_INPUT_MOUSEDEV_PSAUX is not set
# CONFIG_INPUT_KEYBOARD is not set
# CONFIG_INPUT_MOUSE is not set
# CONFIG_SERIO is not set
# CONFIG_LEGACY_PTYS is not set
# CONFIG_DEVKMEM is not set
CONFIG_SERIAL_ARC=y
CONFIG_SERIAL_ARC_CONSOLE=y
# CONFIG_HW_RANDOM is not set
# CONFIG_HWMON is not set
# CONFIG_VGA_CONSOLE is not set
# CONFIG_HID is not set
# CONFIG_USB_SUPPORT is not set
# CONFIG_IOMMU_SUPPORT is not set
CONFIG_EXT2_FS=y
CONFIG_EXT2_FS_XATTR=y
CONFIG_TMPFS=y
# CONFIG_MISC_FILESYSTEMS is not set
CONFIG_NFS_FS=y
# CONFIG_ENABLE_WARN_DEPRECATED is not set
# CONFIG_ENABLE_MUST_CHECK is not set
CONFIG_XZ_DEC=y

5
arch/arc/configs/nsimosci_defconfig
View file

@ -1,4 +1,4 @@
CONFIG_CROSS_COMPILE="arc-linux-uclibc-"
CONFIG_CROSS_COMPILE="arc-linux-"
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_DEFAULT_HOSTNAME="ARCLinux"
# CONFIG_SWAP is not set
@ -23,8 +23,7 @@ CONFIG_MODULES=y
# CONFIG_BLK_DEV_BSG is not set
# CONFIG_IOSCHED_DEADLINE is not set
# CONFIG_IOSCHED_CFQ is not set
CONFIG_ARC_PLAT_FPGA_LEGACY=y
# CONFIG_ARC_HAS_RTSC is not set
CONFIG_ARC_PLAT_SIM=y
CONFIG_ARC_BUILTIN_DTB_NAME="nsimosci"
# CONFIG_COMPACTION is not set
CONFIG_NET=y

73
arch/arc/configs/nsimosci_hs_defconfig Normal file
View file

@ -0,0 +1,73 @@
CONFIG_CROSS_COMPILE="arc-linux-uclibc-"
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_DEFAULT_HOSTNAME="ARCLinux"
# CONFIG_SWAP is not set
CONFIG_SYSVIPC=y
# CONFIG_CROSS_MEMORY_ATTACH is not set
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_NAMESPACES=y
# CONFIG_UTS_NS is not set
# CONFIG_PID_NS is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE="../arc_initramfs_hs/"
CONFIG_KALLSYMS_ALL=y
CONFIG_EMBEDDED=y
# CONFIG_SLUB_DEBUG is not set
# CONFIG_COMPAT_BRK is not set
CONFIG_KPROBES=y
CONFIG_MODULES=y
# CONFIG_LBDAF is not set
# CONFIG_BLK_DEV_BSG is not set
# CONFIG_IOSCHED_DEADLINE is not set
# CONFIG_IOSCHED_CFQ is not set
CONFIG_ARC_PLAT_SIM=y
CONFIG_ISA_ARCV2=y
CONFIG_ARC_BUILTIN_DTB_NAME="nsimosci_hs"
# CONFIG_COMPACTION is not set
CONFIG_NET=y
CONFIG_PACKET=y
CONFIG_UNIX=y
CONFIG_UNIX_DIAG=y
CONFIG_NET_KEY=y
CONFIG_INET=y
# CONFIG_IPV6 is not set
# CONFIG_STANDALONE is not set
# CONFIG_PREVENT_FIRMWARE_BUILD is not set
# CONFIG_FIRMWARE_IN_KERNEL is not set
# CONFIG_BLK_DEV is not set
CONFIG_NETDEVICES=y
CONFIG_NET_OSCI_LAN=y
CONFIG_INPUT_EVDEV=y
# CONFIG_MOUSE_PS2_ALPS is not set
# CONFIG_MOUSE_PS2_LOGIPS2PP is not set
# CONFIG_MOUSE_PS2_SYNAPTICS is not set
# CONFIG_MOUSE_PS2_TRACKPOINT is not set
CONFIG_MOUSE_PS2_TOUCHKIT=y
# CONFIG_SERIO_SERPORT is not set
CONFIG_SERIO_ARC_PS2=y
# CONFIG_LEGACY_PTYS is not set
# CONFIG_DEVKMEM is not set
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_8250_NR_UARTS=1
CONFIG_SERIAL_8250_RUNTIME_UARTS=1
CONFIG_SERIAL_OF_PLATFORM=y
# CONFIG_HW_RANDOM is not set
# CONFIG_HWMON is not set
CONFIG_FB=y
# CONFIG_VGA_CONSOLE is not set
CONFIG_FRAMEBUFFER_CONSOLE=y
CONFIG_LOGO=y
# CONFIG_HID is not set
# CONFIG_USB_SUPPORT is not set
# CONFIG_IOMMU_SUPPORT is not set
CONFIG_EXT2_FS=y
CONFIG_EXT2_FS_XATTR=y
CONFIG_TMPFS=y
# CONFIG_MISC_FILESYSTEMS is not set
CONFIG_NFS_FS=y
# CONFIG_ENABLE_WARN_DEPRECATED is not set
# CONFIG_ENABLE_MUST_CHECK is not set

93
arch/arc/configs/nsimosci_hs_smp_defconfig Normal file
View file

@ -0,0 +1,93 @@
CONFIG_CROSS_COMPILE="arc-linux-uclibc-"
CONFIG_DEFAULT_HOSTNAME="ARCLinux"
# CONFIG_SWAP is not set
CONFIG_SYSVIPC=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
# CONFIG_UTS_NS is not set
# CONFIG_PID_NS is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE="../arc_initramfs_hs/"
# CONFIG_COMPAT_BRK is not set
CONFIG_KPROBES=y
CONFIG_MODULES=y
# CONFIG_LBDAF is not set
# CONFIG_BLK_DEV_BSG is not set
# CONFIG_IOSCHED_DEADLINE is not set
# CONFIG_IOSCHED_CFQ is not set
CONFIG_ARC_PLAT_SIM=y
CONFIG_ARC_BOARD_ML509=y
CONFIG_ISA_ARCV2=y
CONFIG_SMP=y
CONFIG_ARC_HAS_LL64=y
# CONFIG_ARC_HAS_RTSC is not set
CONFIG_ARC_BUILTIN_DTB_NAME="nsimosci_hs_idu"
CONFIG_PREEMPT=y
# CONFIG_COMPACTION is not set
# CONFIG_CROSS_MEMORY_ATTACH is not set
CONFIG_NET=y
CONFIG_PACKET=y
CONFIG_PACKET_DIAG=y
CONFIG_UNIX=y
CONFIG_UNIX_DIAG=y
CONFIG_NET_KEY=y
CONFIG_INET=y
# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
# CONFIG_INET_XFRM_MODE_TUNNEL is not set
# CONFIG_INET_XFRM_MODE_BEET is not set
# CONFIG_INET_LRO is not set
# CONFIG_IPV6 is not set
# CONFIG_WIRELESS is not set
# CONFIG_STANDALONE is not set
# CONFIG_PREVENT_FIRMWARE_BUILD is not set
# CONFIG_FIRMWARE_IN_KERNEL is not set
# CONFIG_BLK_DEV is not set
CONFIG_NETDEVICES=y
# CONFIG_NET_VENDOR_ARC is not set
# CONFIG_NET_CADENCE is not set
# CONFIG_NET_VENDOR_BROADCOM is not set
# CONFIG_NET_VENDOR_INTEL is not set
# CONFIG_NET_VENDOR_MARVELL is not set
# CONFIG_NET_VENDOR_MICREL is not set
# CONFIG_NET_VENDOR_NATSEMI is not set
# CONFIG_NET_VENDOR_SEEQ is not set
# CONFIG_NET_VENDOR_STMICRO is not set
# CONFIG_NET_VENDOR_VIA is not set
# CONFIG_NET_VENDOR_WIZNET is not set
CONFIG_NET_OSCI_LAN=y
# CONFIG_WLAN is not set
CONFIG_INPUT_EVDEV=y
CONFIG_MOUSE_PS2_TOUCHKIT=y
# CONFIG_SERIO_SERPORT is not set
CONFIG_SERIO_LIBPS2=y
CONFIG_SERIO_ARC_PS2=y
CONFIG_VT_HW_CONSOLE_BINDING=y
# CONFIG_LEGACY_PTYS is not set
# CONFIG_DEVKMEM is not set
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_8250_NR_UARTS=1
CONFIG_SERIAL_8250_RUNTIME_UARTS=1
CONFIG_SERIAL_8250_DW=y
CONFIG_SERIAL_OF_PLATFORM=y
# CONFIG_HW_RANDOM is not set
# CONFIG_HWMON is not set
CONFIG_FB=y
CONFIG_ARCPGU_RGB888=y
CONFIG_ARCPGU_DISPTYPE=0
# CONFIG_VGA_CONSOLE is not set
CONFIG_FRAMEBUFFER_CONSOLE=y
CONFIG_LOGO=y
# CONFIG_HID is not set
# CONFIG_USB_SUPPORT is not set
# CONFIG_IOMMU_SUPPORT is not set
CONFIG_EXT2_FS=y
CONFIG_EXT2_FS_XATTR=y
CONFIG_TMPFS=y
# CONFIG_MISC_FILESYSTEMS is not set
CONFIG_NFS_FS=y
# CONFIG_ENABLE_WARN_DEPRECATED is not set
# CONFIG_ENABLE_MUST_CHECK is not set
CONFIG_FTRACE=y

3
arch/arc/configs/tb10x_defconfig
View file

@ -1,4 +1,4 @@
CONFIG_CROSS_COMPILE="arc-linux-uclibc-"
CONFIG_CROSS_COMPILE="arc-linux-"
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_DEFAULT_HOSTNAME="tb10x"
CONFIG_SYSVIPC=y
@ -26,7 +26,6 @@ CONFIG_MODULE_UNLOAD=y
# CONFIG_BLOCK is not set
CONFIG_ARC_PLAT_TB10X=y
CONFIG_ARC_CACHE_LINE_SHIFT=5
# CONFIG_ARC_HAS_RTSC is not set
CONFIG_ARC_STACK_NONEXEC=y
CONFIG_HZ=250
CONFIG_ARC_BUILTIN_DTB_NAME="abilis_tb100_dvk"

102
arch/arc/configs/vdk_hs38_defconfig Normal file
View file

@ -0,0 +1,102 @@
CONFIG_CROSS_COMPILE="arc-linux-uclibc-"
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_DEFAULT_HOSTNAME="ARCLinux"
# CONFIG_CROSS_MEMORY_ATTACH is not set
CONFIG_HIGH_RES_TIMERS=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_EMBEDDED=y
CONFIG_PERF_EVENTS=y
# CONFIG_VM_EVENT_COUNTERS is not set
# CONFIG_SLUB_DEBUG is not set
# CONFIG_COMPAT_BRK is not set
CONFIG_PARTITION_ADVANCED=y
CONFIG_ARC_PLAT_AXS10X=y
CONFIG_AXS103=y
CONFIG_ISA_ARCV2=y
CONFIG_ARC_UBOOT_SUPPORT=y
CONFIG_ARC_BUILTIN_DTB_NAME="vdk_hs38"
CONFIG_PREEMPT=y
CONFIG_NET=y
CONFIG_PACKET=y
CONFIG_UNIX=y
CONFIG_NET_KEY=y
CONFIG_INET=y
CONFIG_IP_PNP=y
CONFIG_IP_PNP_DHCP=y
CONFIG_IP_PNP_BOOTP=y
CONFIG_IP_PNP_RARP=y
# CONFIG_IPV6 is not set
CONFIG_DEVTMPFS=y
CONFIG_DEVTMPFS_MOUNT=y
# CONFIG_STANDALONE is not set
# CONFIG_PREVENT_FIRMWARE_BUILD is not set
# CONFIG_FIRMWARE_IN_KERNEL is not set
CONFIG_MTD=y
CONFIG_MTD_CMDLINE_PARTS=y
CONFIG_MTD_BLOCK=y
CONFIG_MTD_SLRAM=y
CONFIG_BLK_DEV_RAM=y
CONFIG_SCSI=y
CONFIG_BLK_DEV_SD=y
CONFIG_NETDEVICES=y
# CONFIG_NET_VENDOR_ARC is not set
# CONFIG_NET_VENDOR_BROADCOM is not set
# CONFIG_NET_VENDOR_INTEL is not set
# CONFIG_NET_VENDOR_MARVELL is not set
# CONFIG_NET_VENDOR_MICREL is not set
# CONFIG_NET_VENDOR_NATSEMI is not set
# CONFIG_NET_VENDOR_SEEQ is not set
CONFIG_STMMAC_ETH=y
# CONFIG_NET_VENDOR_VIA is not set
# CONFIG_NET_VENDOR_WIZNET is not set
CONFIG_NATIONAL_PHY=y
CONFIG_MOUSE_PS2_TOUCHKIT=y
CONFIG_SERIO_ARC_PS2=y
# CONFIG_LEGACY_PTYS is not set
# CONFIG_DEVKMEM is not set
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_8250_DW=y
CONFIG_SERIAL_OF_PLATFORM=y
# CONFIG_HW_RANDOM is not set
# CONFIG_HWMON is not set
CONFIG_FB=y
CONFIG_ARCPGU_RGB888=y
CONFIG_ARCPGU_DISPTYPE=0
# CONFIG_VGA_CONSOLE is not set
CONFIG_FRAMEBUFFER_CONSOLE=y
CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
CONFIG_LOGO=y
# CONFIG_LOGO_LINUX_MONO is not set
# CONFIG_LOGO_LINUX_VGA16 is not set
# CONFIG_LOGO_LINUX_CLUT224 is not set
CONFIG_USB=y
CONFIG_USB_EHCI_HCD=y
# CONFIG_USB_EHCI_TT_NEWSCHED is not set
CONFIG_USB_EHCI_HCD_PLATFORM=y
CONFIG_USB_OHCI_HCD=y
CONFIG_USB_OHCI_HCD_PLATFORM=y
CONFIG_USB_STORAGE=y
CONFIG_USB_SERIAL=y
# CONFIG_IOMMU_SUPPORT is not set
CONFIG_EXT3_FS=y
CONFIG_EXT4_FS=y
CONFIG_MSDOS_FS=y
CONFIG_VFAT_FS=y
CONFIG_NTFS_FS=y
CONFIG_TMPFS=y
CONFIG_JFFS2_FS=y
CONFIG_NFS_FS=y
CONFIG_NLS_CODEPAGE_437=y
CONFIG_NLS_ISO8859_1=y
# CONFIG_ENABLE_WARN_DEPRECATED is not set
# CONFIG_ENABLE_MUST_CHECK is not set
CONFIG_STRIP_ASM_SYMS=y
CONFIG_DEBUG_SHIRQ=y
CONFIG_LOCKUP_DETECTOR=y
CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=10
# CONFIG_SCHED_DEBUG is not set
# CONFIG_DEBUG_PREEMPT is not set
# CONFIG_FTRACE is not set

104
arch/arc/configs/vdk_hs38_smp_defconfig Normal file
View file

@ -0,0 +1,104 @@
CONFIG_CROSS_COMPILE="arc-linux-uclibc-"
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_DEFAULT_HOSTNAME="ARCLinux"
# CONFIG_CROSS_MEMORY_ATTACH is not set
CONFIG_HIGH_RES_TIMERS=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_EMBEDDED=y
CONFIG_PERF_EVENTS=y
# CONFIG_VM_EVENT_COUNTERS is not set
# CONFIG_SLUB_DEBUG is not set
# CONFIG_COMPAT_BRK is not set
CONFIG_PARTITION_ADVANCED=y
CONFIG_ARC_PLAT_AXS10X=y
CONFIG_AXS103=y
CONFIG_ISA_ARCV2=y
CONFIG_SMP=y
# CONFIG_ARC_HAS_GRTC is not set
CONFIG_ARC_UBOOT_SUPPORT=y
CONFIG_ARC_BUILTIN_DTB_NAME="vdk_hs38_smp"
CONFIG_PREEMPT=y
CONFIG_NET=y
CONFIG_PACKET=y
CONFIG_UNIX=y
CONFIG_NET_KEY=y
CONFIG_INET=y
CONFIG_IP_PNP=y
CONFIG_IP_PNP_DHCP=y
CONFIG_IP_PNP_BOOTP=y
CONFIG_IP_PNP_RARP=y
# CONFIG_IPV6 is not set
CONFIG_DEVTMPFS=y
CONFIG_DEVTMPFS_MOUNT=y
# CONFIG_STANDALONE is not set
# CONFIG_PREVENT_FIRMWARE_BUILD is not set
# CONFIG_FIRMWARE_IN_KERNEL is not set
CONFIG_MTD=y
CONFIG_MTD_CMDLINE_PARTS=y
CONFIG_MTD_BLOCK=y
CONFIG_MTD_SLRAM=y
CONFIG_BLK_DEV_RAM=y
CONFIG_SCSI=y
CONFIG_BLK_DEV_SD=y
CONFIG_NETDEVICES=y
# CONFIG_NET_VENDOR_ARC is not set
# CONFIG_NET_VENDOR_BROADCOM is not set
# CONFIG_NET_VENDOR_INTEL is not set
# CONFIG_NET_VENDOR_MARVELL is not set
# CONFIG_NET_VENDOR_MICREL is not set
# CONFIG_NET_VENDOR_NATSEMI is not set
# CONFIG_NET_VENDOR_SEEQ is not set
CONFIG_STMMAC_ETH=y
# CONFIG_NET_VENDOR_VIA is not set
# CONFIG_NET_VENDOR_WIZNET is not set
CONFIG_NATIONAL_PHY=y
CONFIG_MOUSE_PS2_TOUCHKIT=y
CONFIG_SERIO_ARC_PS2=y
# CONFIG_LEGACY_PTYS is not set
# CONFIG_DEVKMEM is not set
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_8250_DW=y
CONFIG_SERIAL_OF_PLATFORM=y
# CONFIG_HW_RANDOM is not set
# CONFIG_HWMON is not set
CONFIG_FB=y
CONFIG_ARCPGU_RGB888=y
CONFIG_ARCPGU_DISPTYPE=0
# CONFIG_VGA_CONSOLE is not set
CONFIG_FRAMEBUFFER_CONSOLE=y
CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
CONFIG_LOGO=y
# CONFIG_LOGO_LINUX_MONO is not set
# CONFIG_LOGO_LINUX_VGA16 is not set
# CONFIG_LOGO_LINUX_CLUT224 is not set
CONFIG_USB=y
CONFIG_USB_EHCI_HCD=y
# CONFIG_USB_EHCI_TT_NEWSCHED is not set
CONFIG_USB_EHCI_HCD_PLATFORM=y
CONFIG_USB_OHCI_HCD=y
CONFIG_USB_OHCI_HCD_PLATFORM=y
CONFIG_USB_STORAGE=y
CONFIG_USB_SERIAL=y
# CONFIG_IOMMU_SUPPORT is not set
CONFIG_EXT3_FS=y
CONFIG_EXT4_FS=y
CONFIG_MSDOS_FS=y
CONFIG_VFAT_FS=y
CONFIG_NTFS_FS=y
CONFIG_TMPFS=y
CONFIG_JFFS2_FS=y
CONFIG_NFS_FS=y
CONFIG_NLS_CODEPAGE_437=y
CONFIG_NLS_ISO8859_1=y
# CONFIG_ENABLE_WARN_DEPRECATED is not set
# CONFIG_ENABLE_MUST_CHECK is not set
CONFIG_STRIP_ASM_SYMS=y
CONFIG_DEBUG_SHIRQ=y
CONFIG_LOCKUP_DETECTOR=y
CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=10
# CONFIG_SCHED_DEBUG is not set
# CONFIG_DEBUG_PREEMPT is not set
# CONFIG_FTRACE is not set

1
arch/arc/include/asm/Kbuild
View file

@ -1,5 +1,4 @@
generic-y += auxvec.h
generic-y += barrier.h
generic-y += bitsperlong.h
generic-y += bugs.h
generic-y += clkdev.h

66
arch/arc/include/asm/arcregs.h
View file

@ -16,6 +16,8 @@
#define ARC_REG_PERIBASE_BCR 0x69
#define ARC_REG_FP_BCR 0x6B /* ARCompact: Single-Precision FPU */
#define ARC_REG_DPFP_BCR 0x6C /* ARCompact: Dbl Precision FPU */
#define ARC_REG_FP_V2_BCR 0xc8 /* ARCv2 FPU */
#define ARC_REG_SLC_BCR 0xce
#define ARC_REG_DCCM_BCR 0x74 /* DCCM Present + SZ */
#define ARC_REG_TIMERS_BCR 0x75
#define ARC_REG_AP_BCR 0x76
@ -31,6 +33,7 @@
#define ARC_REG_BPU_BCR 0xc0
#define ARC_REG_ISA_CFG_BCR 0xc1
#define ARC_REG_RTT_BCR 0xF2
#define ARC_REG_IRQ_BCR 0xF3
#define ARC_REG_SMART_BCR 0xFF
/* status32 Bits Positions */
@ -51,6 +54,7 @@
* [15: 8] = Exception Cause Code
* [ 7: 0] = Exception Parameters (for certain types only)
*/
#ifdef CONFIG_ISA_ARCOMPACT
#define ECR_V_MEM_ERR 0x01
#define ECR_V_INSN_ERR 0x02
#define ECR_V_MACH_CHK 0x20
@ -58,6 +62,15 @@
#define ECR_V_DTLB_MISS 0x22
#define ECR_V_PROTV 0x23
#define ECR_V_TRAP 0x25
#else
#define ECR_V_MEM_ERR 0x01
#define ECR_V_INSN_ERR 0x02
#define ECR_V_MACH_CHK 0x03
#define ECR_V_ITLB_MISS 0x04
#define ECR_V_DTLB_MISS 0x05
#define ECR_V_PROTV 0x06
#define ECR_V_TRAP 0x09
#endif
/* DTLB Miss and Protection Violation Cause Codes */
@ -76,9 +89,6 @@
#define ECR_C_BIT_DTLB_LD_MISS 8
#define ECR_C_BIT_DTLB_ST_MISS 9
/* Dummy ECR values for Interrupts */
#define event_IRQ1 0x0031abcd
#define event_IRQ2 0x0032abcd
/* Auxiliary registers */
#define AUX_IDENTITY 4
@ -204,9 +214,11 @@ struct bcr_identity {
struct bcr_isa {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned int pad1:23, atomic1:1, ver:8;
unsigned int div_rem:4, pad2:4, ldd:1, unalign:1, atomic:1, be:1,
pad1:11, atomic1:1, ver:8;
#else
unsigned int ver:8, atomic1:1, pad1:23;
unsigned int ver:8, atomic1:1, pad1:11, be:1, atomic:1, unalign:1,
ldd:1, pad2:4, div_rem:4;
#endif
};
@ -269,11 +281,19 @@ struct bcr_fp_arcompact {
#endif
};
struct bcr_fp_arcv2 {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned int pad2:15, dp:1, pad1:7, sp:1, ver:8;
#else
unsigned int ver:8, sp:1, pad1:7, dp:1, pad2:15;
#endif
};
struct bcr_timer {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned int pad2:15, rtsc:1, pad1:6, t1:1, t0:1, ver:8;
unsigned int pad2:15, rtsc:1, pad1:5, rtc:1, t1:1, t0:1, ver:8;
#else
unsigned int ver:8, t0:1, t1:1, pad1:6, rtsc:1, pad2:15;
unsigned int ver:8, t0:1, t1:1, rtc:1, pad1:5, rtsc:1, pad2:15;
#endif
};
@ -285,6 +305,14 @@ struct bcr_bpu_arcompact {
#endif
};
struct bcr_bpu_arcv2 {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned int pad:6, fbe:2, tqe:2, ts:4, ft:1, rse:2, pte:3, bce:3, ver:8;
#else
unsigned int ver:8, bce:3, pte:3, rse:2, ft:1, ts:4, tqe:2, fbe:2, pad:6;
#endif
};
struct bcr_generic {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned int pad:24, ver:8;
@ -299,11 +327,12 @@ struct bcr_generic {
*/
struct cpuinfo_arc_mmu {
unsigned int ver, pg_sz, sets, ways, u_dtlb, u_itlb, num_tlb;
unsigned int ver:4, pg_sz_k:8, s_pg_sz_m:8, u_dtlb:6, u_itlb:6;
unsigned int num_tlb:16, sets:12, ways:4;
};
struct cpuinfo_arc_cache {
unsigned int sz_k:8, line_len:8, assoc:4, ver:4, alias:1, vipt:1, pad:6;
unsigned int sz_k:14, line_len:8, assoc:4, ver:4, alias:1, vipt:1;
};
struct cpuinfo_arc_bpu {
@ -315,14 +344,13 @@ struct cpuinfo_arc_ccm {
};
struct cpuinfo_arc {
struct cpuinfo_arc_cache icache, dcache;
struct cpuinfo_arc_cache icache, dcache, slc;
struct cpuinfo_arc_mmu mmu;
struct cpuinfo_arc_bpu bpu;
struct bcr_identity core;
struct bcr_isa isa;
struct bcr_timer timers;
unsigned int vec_base;
unsigned int uncached_base;
struct cpuinfo_arc_ccm iccm, dccm;
struct {
unsigned int swap:1, norm:1, minmax:1, barrel:1, crc:1, pad1:3,
@ -336,6 +364,22 @@ struct cpuinfo_arc {
extern struct cpuinfo_arc cpuinfo_arc700[];
static inline int is_isa_arcv2(void)
{
return IS_ENABLED(CONFIG_ISA_ARCV2);
}
static inline int is_isa_arcompact(void)
{
return IS_ENABLED(CONFIG_ISA_ARCOMPACT);
}
#if defined(CONFIG_ISA_ARCOMPACT) && !defined(_CPU_DEFAULT_A7)
#error "Toolchain not configured for ARCompact builds"
#elif defined(CONFIG_ISA_ARCV2) && !defined(_CPU_DEFAULT_HS)
#error "Toolchain not configured for ARCv2 builds"
#endif
#endif /* __ASEMBLY__ */
#endif /* _ASM_ARC_ARCREGS_H */

35
arch/arc/include/asm/atomic.h
View file

@ -23,13 +23,21 @@
#define atomic_set(v, i) (((v)->counter) = (i))
#ifdef CONFIG_ISA_ARCV2
#define PREFETCHW " prefetchw [%1] \n"
#else
#define PREFETCHW
#endif
#define ATOMIC_OP(op, c_op, asm_op) \
static inline void atomic_##op(int i, atomic_t *v) \
{ \
unsigned int temp; \
\
__asm__ __volatile__( \
"1: llock %0, [%1] \n" \
"1: \n" \
PREFETCHW \
" llock %0, [%1] \n" \
" " #asm_op " %0, %0, %2 \n" \
" scond %0, [%1] \n" \
" bnz 1b \n" \
@ -43,8 +51,16 @@ static inline int atomic_##op##_return(int i, atomic_t *v) \
{ \
unsigned int temp; \
\
/* \
* Explicit full memory barrier needed before/after as \
* LLOCK/SCOND thmeselves don't provide any such semantics \
*/ \
smp_mb(); \
\
__asm__ __volatile__( \
"1: llock %0, [%1] \n" \
"1: \n" \
PREFETCHW \
" llock %0, [%1] \n" \
" " #asm_op " %0, %0, %2 \n" \
" scond %0, [%1] \n" \
" bnz 1b \n" \
@ -52,6 +68,8 @@ static inline int atomic_##op##_return(int i, atomic_t *v) \
: "r"(&v->counter), "ir"(i) \
: "cc"); \
\
smp_mb(); \
\
return temp; \
}
@ -105,6 +123,9 @@ static inline int atomic_##op##_return(int i, atomic_t *v) \
unsigned long flags; \
unsigned long temp; \
\
/* \
* spin lock/unlock provides the needed smp_mb() before/after \
*/ \
atomic_ops_lock(flags); \
temp = v->counter; \
temp c_op i; \
@ -142,9 +163,19 @@ ATOMIC_OP(and, &=, and)
#define __atomic_add_unless(v, a, u) \
({ \
int c, old; \
\
/* \
* Explicit full memory barrier needed before/after as \
* LLOCK/SCOND thmeselves don't provide any such semantics \
*/ \
smp_mb(); \
\
c = atomic_read(v); \
while (c != (u) && (old = atomic_cmpxchg((v), c, c + (a))) != c)\
c = old; \
\
smp_mb(); \
\
c; \
})

48
arch/arc/include/asm/barrier.h Normal file
View file

@ -0,0 +1,48 @@
/*
* Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_BARRIER_H
#define __ASM_BARRIER_H
#ifdef CONFIG_ISA_ARCV2
/*
* ARCv2 based HS38 cores are in-order issue, but still weakly ordered
* due to micro-arch buffering/queuing of load/store, cache hit vs. miss ...
*
* Explicit barrier provided by DMB instruction
* - Operand supports fine grained load/store/load+store semantics
* - Ensures that selected memory operation issued before it will complete
* before any subsequent memory operation of same type
* - DMB guarantees SMP as well as local barrier semantics
* (asm-generic/barrier.h ensures sane smp_*mb if not defined here, i.e.
* UP: barrier(), SMP: smp_*mb == *mb)
* - DSYNC provides DMB+completion_of_cache_bpu_maintenance_ops hence not needed
* in the general case. Plus it only provides full barrier.
*/
#define mb() asm volatile("dmb 3\n" : : : "memory")
#define rmb() asm volatile("dmb 1\n" : : : "memory")
#define wmb() asm volatile("dmb 2\n" : : : "memory")
#endif
#ifdef CONFIG_ISA_ARCOMPACT
/*
* ARCompact based cores (ARC700) only have SYNC instruction which is super
* heavy weight as it flushes the pipeline as well.
* There are no real SMP implementations of such cores.
*/
#define mb() asm volatile("sync\n" : : : "memory")
#endif
#include <asm-generic/barrier.h>
#endif

527
arch/arc/include/asm/bitops.h
View file

@ -18,83 +18,50 @@
#include <linux/types.h>
#include <linux/compiler.h>
#include <asm/barrier.h>
#ifndef CONFIG_ARC_HAS_LLSC
#include <asm/smp.h>
#endif
/*
* Hardware assisted read-modify-write using ARC700 LLOCK/SCOND insns.
* The Kconfig glue ensures that in SMP, this is only set if the container
* SoC/platform has cross-core coherent LLOCK/SCOND
*/
#if defined(CONFIG_ARC_HAS_LLSC)
static inline void set_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned int temp;
/*
* Hardware assisted Atomic-R-M-W
*/
m += nr >> 5;
/*
* ARC ISA micro-optimization:
*
* Instructions dealing with bitpos only consider lower 5 bits (0-31)
* e.g (x << 33) is handled like (x << 1) by ASL instruction
* (mem pointer still needs adjustment to point to next word)
*
* Hence the masking to clamp @nr arg can be elided in general.
*
* However if @nr is a constant (above assumed it in a register),
* and greater than 31, gcc can optimize away (x << 33) to 0,
* as overflow, given the 32-bit ISA. Thus masking needs to be done
* for constant @nr, but no code is generated due to const prop.
*/
if (__builtin_constant_p(nr))
nr &= 0x1f;
__asm__ __volatile__(
"1: llock %0, [%1] \n"
" bset %0, %0, %2 \n"
" scond %0, [%1] \n"
" bnz 1b \n"
: "=&r"(temp)
: "r"(m), "ir"(nr)
: "cc");
}
static inline void clear_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned int temp;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
__asm__ __volatile__(
"1: llock %0, [%1] \n"
" bclr %0, %0, %2 \n"
" scond %0, [%1] \n"
" bnz 1b \n"
: "=&r"(temp)
: "r"(m), "ir"(nr)
: "cc");
}
static inline void change_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned int temp;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
__asm__ __volatile__(
"1: llock %0, [%1] \n"
" bxor %0, %0, %2 \n"
" scond %0, [%1] \n"
" bnz 1b \n"
: "=&r"(temp)
: "r"(m), "ir"(nr)
: "cc");
#define BIT_OP(op, c_op, asm_op) \
static inline void op##_bit(unsigned long nr, volatile unsigned long *m)\
{ \
unsigned int temp; \
\
m += nr >> 5; \
\
/* \
* ARC ISA micro-optimization: \
* \
* Instructions dealing with bitpos only consider lower 5 bits \
* e.g (x << 33) is handled like (x << 1) by ASL instruction \
* (mem pointer still needs adjustment to point to next word) \
* \
* Hence the masking to clamp @nr arg can be elided in general. \
* \
* However if @nr is a constant (above assumed in a register), \
* and greater than 31, gcc can optimize away (x << 33) to 0, \
* as overflow, given the 32-bit ISA. Thus masking needs to be \
* done for const @nr, but no code is generated due to gcc \
* const prop. \
*/ \
if (__builtin_constant_p(nr)) \
nr &= 0x1f; \
\
__asm__ __volatile__( \
"1: llock %0, [%1] \n" \
" " #asm_op " %0, %0, %2 \n" \
" scond %0, [%1] \n" \
" bnz 1b \n" \
: "=&r"(temp) /* Early clobber, to prevent reg reuse */ \
: "r"(m), /* Not "m": llock only supports reg direct addr mode */ \
"ir"(nr) \
: "cc"); \
}
/*
@ -108,75 +75,38 @@ static inline void change_bit(unsigned long nr, volatile unsigned long *m)
* Since ARC lacks a equivalent h/w primitive, the bit is set unconditionally
* and the old value of bit is returned
*/
static inline int test_and_set_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned long old, temp;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
__asm__ __volatile__(
"1: llock %0, [%2] \n"
" bset %1, %0, %3 \n"
" scond %1, [%2] \n"
" bnz 1b \n"
: "=&r"(old), "=&r"(temp)
: "r"(m), "ir"(nr)
: "cc");
return (old & (1 << nr)) != 0;
}
static inline int
test_and_clear_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned int old, temp;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
__asm__ __volatile__(
"1: llock %0, [%2] \n"
" bclr %1, %0, %3 \n"
" scond %1, [%2] \n"
" bnz 1b \n"
: "=&r"(old), "=&r"(temp)
: "r"(m), "ir"(nr)
: "cc");
return (old & (1 << nr)) != 0;
}
static inline int
test_and_change_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned int old, temp;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
__asm__ __volatile__(
"1: llock %0, [%2] \n"
" bxor %1, %0, %3 \n"
" scond %1, [%2] \n"
" bnz 1b \n"
: "=&r"(old), "=&r"(temp)
: "r"(m), "ir"(nr)
: "cc");
return (old & (1 << nr)) != 0;
#define TEST_N_BIT_OP(op, c_op, asm_op) \
static inline int test_and_##op##_bit(unsigned long nr, volatile unsigned long *m)\
{ \
unsigned long old, temp; \
\
m += nr >> 5; \
\
if (__builtin_constant_p(nr)) \
nr &= 0x1f; \
\
/* \
* Explicit full memory barrier needed before/after as \
* LLOCK/SCOND themselves don't provide any such smenatic \
*/ \
smp_mb(); \
\
__asm__ __volatile__( \
"1: llock %0, [%2] \n" \
" " #asm_op " %1, %0, %3 \n" \
" scond %1, [%2] \n" \
" bnz 1b \n" \
: "=&r"(old), "=&r"(temp) \
: "r"(m), "ir"(nr) \
: "cc"); \
\
smp_mb(); \
\
return (old & (1 << nr)) != 0; \
}
#else /* !CONFIG_ARC_HAS_LLSC */
#include <asm/smp.h>
/*
* Non hardware assisted Atomic-R-M-W
* Locking would change to irq-disabling only (UP) and spinlocks (SMP)
@ -193,108 +123,43 @@ test_and_change_bit(unsigned long nr, volatile unsigned long *m)
* at compile time)
*/
static inline void set_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned long temp, flags;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
bitops_lock(flags);
temp = *m;
*m = temp | (1UL << nr);
bitops_unlock(flags);
#define BIT_OP(op, c_op, asm_op) \
static inline void op##_bit(unsigned long nr, volatile unsigned long *m)\
{ \
unsigned long temp, flags; \
m += nr >> 5; \
\
if (__builtin_constant_p(nr)) \
nr &= 0x1f; \
\
/* \
* spin lock/unlock provide the needed smp_mb() before/after \
*/ \
bitops_lock(flags); \
\
temp = *m; \
*m = temp c_op (1UL << nr); \
\
bitops_unlock(flags); \
}
static inline void clear_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned long temp, flags;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
bitops_lock(flags);
temp = *m;
*m = temp & ~(1UL << nr);
bitops_unlock(flags);
}
static inline void change_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned long temp, flags;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
bitops_lock(flags);
temp = *m;
*m = temp ^ (1UL << nr);
bitops_unlock(flags);
}
static inline int test_and_set_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned long old, flags;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
bitops_lock(flags);
old = *m;
*m = old | (1 << nr);
bitops_unlock(flags);
return (old & (1 << nr)) != 0;
}
static inline int
test_and_clear_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned long old, flags;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
bitops_lock(flags);
old = *m;
*m = old & ~(1 << nr);
bitops_unlock(flags);
return (old & (1 << nr)) != 0;
}
static inline int
test_and_change_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned long old, flags;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
bitops_lock(flags);
old = *m;
*m = old ^ (1 << nr);
bitops_unlock(flags);
return (old & (1 << nr)) != 0;
#define TEST_N_BIT_OP(op, c_op, asm_op) \
static inline int test_and_##op##_bit(unsigned long nr, volatile unsigned long *m)\
{ \
unsigned long old, flags; \
m += nr >> 5; \
\
if (__builtin_constant_p(nr)) \
nr &= 0x1f; \
\
bitops_lock(flags); \
\
old = *m; \
*m = old c_op (1 << nr); \
\
bitops_unlock(flags); \
\
return (old & (1 << nr)) != 0; \
}
#endif /* CONFIG_ARC_HAS_LLSC */
@ -303,86 +168,51 @@ test_and_change_bit(unsigned long nr, volatile unsigned long *m)
* Non atomic variants
**************************************/
static inline void __set_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned long temp;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
temp = *m;
*m = temp | (1UL << nr);
#define __BIT_OP(op, c_op, asm_op) \
static inline void __##op##_bit(unsigned long nr, volatile unsigned long *m) \
{ \
unsigned long temp; \
m += nr >> 5; \
\
if (__builtin_constant_p(nr)) \
nr &= 0x1f; \
\
temp = *m; \
*m = temp c_op (1UL << nr); \
}
static inline void __clear_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned long temp;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
temp = *m;
*m = temp & ~(1UL << nr);
#define __TEST_N_BIT_OP(op, c_op, asm_op) \
static inline int __test_and_##op##_bit(unsigned long nr, volatile unsigned long *m)\
{ \
unsigned long old; \
m += nr >> 5; \
\
if (__builtin_constant_p(nr)) \
nr &= 0x1f; \
\
old = *m; \
*m = old c_op (1 << nr); \
\
return (old & (1 << nr)) != 0; \
}
static inline void __change_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned long temp;
m += nr >> 5;
#define BIT_OPS(op, c_op, asm_op) \
\
/* set_bit(), clear_bit(), change_bit() */ \
BIT_OP(op, c_op, asm_op) \
\
/* test_and_set_bit(), test_and_clear_bit(), test_and_change_bit() */\
TEST_N_BIT_OP(op, c_op, asm_op) \
\
/* __set_bit(), __clear_bit(), __change_bit() */ \
__BIT_OP(op, c_op, asm_op) \
\
/* __test_and_set_bit(), __test_and_clear_bit(), __test_and_change_bit() */\
__TEST_N_BIT_OP(op, c_op, asm_op)
if (__builtin_constant_p(nr))
nr &= 0x1f;
temp = *m;
*m = temp ^ (1UL << nr);
}
static inline int
__test_and_set_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned long old;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
old = *m;
*m = old | (1 << nr);
return (old & (1 << nr)) != 0;
}
static inline int
__test_and_clear_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned long old;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
old = *m;
*m = old & ~(1 << nr);
return (old & (1 << nr)) != 0;
}
static inline int
__test_and_change_bit(unsigned long nr, volatile unsigned long *m)
{
unsigned long old;
m += nr >> 5;
if (__builtin_constant_p(nr))
nr &= 0x1f;
old = *m;
*m = old ^ (1 << nr);
return (old & (1 << nr)) != 0;
}
BIT_OPS(set, |, bset)
BIT_OPS(clear, & ~, bclr)
BIT_OPS(change, ^, bxor)
/*
* This routine doesn't need to be atomic.
@ -402,6 +232,8 @@ test_bit(unsigned int nr, const volatile unsigned long *addr)
return ((mask & *addr) != 0);
}
#ifdef CONFIG_ISA_ARCOMPACT
/*
* Count the number of zeros, starting from MSB
* Helper for fls( ) friends
@ -494,6 +326,75 @@ static inline __attribute__ ((const)) int __ffs(unsigned long word)
return ffs(word) - 1;
}
#else /* CONFIG_ISA_ARCV2 */
/*
* fls = Find Last Set in word
* @result: [1-32]
* fls(1) = 1, fls(0x80000000) = 32, fls(0) = 0
*/
static inline __attribute__ ((const)) int fls(unsigned long x)
{
int n;
asm volatile(
" fls.f %0, %1 \n" /* 0:31; 0(Z) if src 0 */
" add.nz %0, %0, 1 \n" /* 0:31 -> 1:32 */
: "=r"(n) /* Early clobber not needed */
: "r"(x)
: "cc");
return n;
}
/*
* __fls: Similar to fls, but zero based (0-31). Also 0 if no bit set
*/
static inline __attribute__ ((const)) int __fls(unsigned long x)
{
/* FLS insn has exactly same semantics as the API */
return __builtin_arc_fls(x);
}
/*
* ffs = Find First Set in word (LSB to MSB)
* @result: [1-32], 0 if all 0's
*/
static inline __attribute__ ((const)) int ffs(unsigned long x)
{
int n;
asm volatile(
" ffs.f %0, %1 \n" /* 0:31; 31(Z) if src 0 */
" add.nz %0, %0, 1 \n" /* 0:31 -> 1:32 */
" mov.z %0, 0 \n" /* 31(Z)-> 0 */
: "=r"(n) /* Early clobber not needed */
: "r"(x)
: "cc");
return n;
}
/*
* __ffs: Similar to ffs, but zero based (0-31)
*/
static inline __attribute__ ((const)) int __ffs(unsigned long x)
{
int n;
asm volatile(
" ffs.f %0, %1 \n" /* 0:31; 31(Z) if src 0 */
" mov.z %0, 0 \n" /* 31(Z)-> 0 */
: "=r"(n)
: "r"(x)
: "cc");
return n;
}
#endif /* CONFIG_ISA_ARCOMPACT */
/*
* ffz = Find First Zero in word.
* @return:[0-31], 32 if all 1's

18
arch/arc/include/asm/cache.h
View file

@ -60,7 +60,7 @@ extern void read_decode_cache_bcr(void);
#define ARC_REG_IC_IVIC 0x10
#define ARC_REG_IC_CTRL 0x11
#define ARC_REG_IC_IVIL 0x19
#if defined(CONFIG_ARC_MMU_V3)
#if defined(CONFIG_ARC_MMU_V3) || defined(CONFIG_ARC_MMU_V4)
#define ARC_REG_IC_PTAG 0x1E
#endif
@ -74,12 +74,24 @@ extern void read_decode_cache_bcr(void);
#define ARC_REG_DC_IVDL 0x4A
#define ARC_REG_DC_FLSH 0x4B
#define ARC_REG_DC_FLDL 0x4C
#if defined(CONFIG_ARC_MMU_V3)
#define ARC_REG_DC_PTAG 0x5C
#endif
/* Bit val in DC_CTRL */
#define DC_CTRL_INV_MODE_FLUSH 0x40
#define DC_CTRL_FLUSH_STATUS 0x100
/*System-level cache (L2 cache) related Auxiliary registers */
#define ARC_REG_SLC_CFG 0x901
#define ARC_REG_SLC_CTRL 0x903
#define ARC_REG_SLC_FLUSH 0x904
#define ARC_REG_SLC_INVALIDATE 0x905
#define ARC_REG_SLC_RGN_START 0x914
#define ARC_REG_SLC_RGN_END 0x916
/* Bit val in SLC_CONTROL */
#define SLC_CTRL_IM 0x040
#define SLC_CTRL_DISABLE 0x001
#define SLC_CTRL_BUSY 0x100
#define SLC_CTRL_RGN_OP_INV 0x200
#endif /* _ASM_CACHE_H */

4
arch/arc/include/asm/cacheflush.h
View file

@ -34,9 +34,7 @@ void flush_cache_all(void);
void flush_icache_range(unsigned long start, unsigned long end);
void __sync_icache_dcache(unsigned long paddr, unsigned long vaddr, int len);
void __inv_icache_page(unsigned long paddr, unsigned long vaddr);
void ___flush_dcache_page(unsigned long paddr, unsigned long vaddr);
#define __flush_dcache_page(p, v) \
___flush_dcache_page((unsigned long)p, (unsigned long)v)
void __flush_dcache_page(unsigned long paddr, unsigned long vaddr);
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1

26
arch/arc/include/asm/cmpxchg.h
View file

@ -10,6 +10,8 @@
#define __ASM_ARC_CMPXCHG_H
#include <linux/types.h>
#include <asm/barrier.h>
#include <asm/smp.h>
#ifdef CONFIG_ARC_HAS_LLSC
@ -19,16 +21,25 @@ __cmpxchg(volatile void *ptr, unsigned long expected, unsigned long new)
{
unsigned long prev;
/*
* Explicit full memory barrier needed before/after as
* LLOCK/SCOND thmeselves don't provide any such semantics
*/
smp_mb();
__asm__ __volatile__(
"1: llock %0, [%1] \n"
" brne %0, %2, 2f \n"
" scond %3, [%1] \n"
" bnz 1b \n"
"2: \n"
: "=&r"(prev)
: "r"(ptr), "ir"(expected),
"r"(new) /* can't be "ir". scond can't take limm for "b" */
: "cc");
: "=&r"(prev) /* Early clobber, to prevent reg reuse */
: "r"(ptr), /* Not "m": llock only supports reg direct addr mode */
"ir"(expected),
"r"(new) /* can't be "ir". scond can't take LIMM for "b" */
: "cc", "memory"); /* so that gcc knows memory is being written here */
smp_mb();
return prev;
}
@ -42,6 +53,9 @@ __cmpxchg(volatile void *ptr, unsigned long expected, unsigned long new)
int prev;
volatile unsigned long *p = ptr;
/*
* spin lock/unlock provide the needed smp_mb() before/after
*/
atomic_ops_lock(flags);
prev = *p;
if (prev == expected)
@ -77,12 +91,16 @@ static inline unsigned long __xchg(unsigned long val, volatile void *ptr,
switch (size) {
case 4:
smp_mb();
__asm__ __volatile__(
" ex %0, [%1] \n"
: "+r"(val)
: "r"(ptr)
: "memory");
smp_mb();
return val;
}
return __xchg_bad_pointer();

9
arch/arc/include/asm/delay.h
View file

@ -22,11 +22,10 @@
static inline void __delay(unsigned long loops)
{
__asm__ __volatile__(
"1: sub.f %0, %0, 1 \n"
" jpnz 1b \n"
: "+r"(loops)
:
: "cc");
" lp 1f \n"
" nop \n"
"1: \n"
: "+l"(loops));
}
extern void __bad_udelay(void);

31
arch/arc/include/asm/dma-mapping.h
View file

@ -14,23 +14,6 @@
#include <asm-generic/dma-coherent.h>
#include <asm/cacheflush.h>
#ifndef CONFIG_ARC_PLAT_NEEDS_CPU_TO_DMA
/*
* dma_map_* API take cpu addresses, which is kernel logical address in the
* untranslated address space (0x8000_0000) based. The dma address (bus addr)
* ideally needs to be 0x0000_0000 based hence these glue routines.
* However given that intermediate bus bridges can ignore the high bit, we can
* do with these routines being no-ops.
* If a platform/device comes up which sriclty requires 0 based bus addr
* (e.g. AHB-PCI bridge on Angel4 board), then it can provide it's own versions
*/
#define plat_dma_addr_to_kernel(dev, addr) ((unsigned long)(addr))
#define plat_kernel_addr_to_dma(dev, ptr) ((dma_addr_t)(ptr))
#else
#include <plat/dma_addr.h>
#endif
void *dma_alloc_noncoherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp);
@ -94,7 +77,7 @@ dma_map_single(struct device *dev, void *cpu_addr, size_t size,
enum dma_data_direction dir)
{
_dma_cache_sync((unsigned long)cpu_addr, size, dir);
return plat_kernel_addr_to_dma(dev, cpu_addr);
return (dma_addr_t)cpu_addr;
}
static inline void
@ -147,16 +130,14 @@ static inline void
dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
size_t size, enum dma_data_direction dir)
{
_dma_cache_sync(plat_dma_addr_to_kernel(dev, dma_handle), size,
DMA_FROM_DEVICE);
_dma_cache_sync(dma_handle, size, DMA_FROM_DEVICE);
}
static inline void
dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
size_t size, enum dma_data_direction dir)
{
_dma_cache_sync(plat_dma_addr_to_kernel(dev, dma_handle), size,
DMA_TO_DEVICE);
_dma_cache_sync(dma_handle, size, DMA_TO_DEVICE);
}
static inline void
@ -164,8 +145,7 @@ dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
unsigned long offset, size_t size,
enum dma_data_direction direction)
{
_dma_cache_sync(plat_dma_addr_to_kernel(dev, dma_handle) + offset,
size, DMA_FROM_DEVICE);
_dma_cache_sync(dma_handle + offset, size, DMA_FROM_DEVICE);
}
static inline void
@ -173,8 +153,7 @@ dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
unsigned long offset, size_t size,
enum dma_data_direction direction)
{
_dma_cache_sync(plat_dma_addr_to_kernel(dev, dma_handle) + offset,
size, DMA_TO_DEVICE);
_dma_cache_sync(dma_handle + offset, size, DMA_TO_DEVICE);
}
static inline void

5
arch/arc/include/asm/elf.h
View file

@ -15,6 +15,11 @@
/* These ELF defines belong to uapi but libc elf.h already defines them */
#define EM_ARCOMPACT 93
#define EM_ARCV2 195 /* ARCv2 Cores */
#define EM_ARC_INUSE (IS_ENABLED(CONFIG_ISA_ARCOMPACT) ? \
EM_ARCOMPACT : EM_ARCV2)
/* ARC Relocations (kernel Modules only) */
#define R_ARC_32 0x4
#define R_ARC_32_ME 0x1B

190
arch/arc/include/asm/entry-arcv2.h Normal file
View file

@ -0,0 +1,190 @@
#ifndef __ASM_ARC_ENTRY_ARCV2_H
#define __ASM_ARC_ENTRY_ARCV2_H
#include <asm/asm-offsets.h>
#include <asm/irqflags-arcv2.h>
#include <asm/thread_info.h> /* For THREAD_SIZE */
/*------------------------------------------------------------------------*/
.macro INTERRUPT_PROLOGUE called_from
; Before jumping to Interrupt Vector, hardware micro-ops did following:
; 1. SP auto-switched to kernel mode stack
; 2. STATUS32.Z flag set to U mode at time of interrupt (U:1, K:0)
; 3. Auto saved: r0-r11, blink, LPE,LPS,LPC, JLI,LDI,EI, PC, STAT32
;
; Now manually save: r12, sp, fp, gp, r25
PUSH r12
; Saving pt_regs->sp correctly requires some extra work due to the way
; Auto stack switch works
; - U mode: retrieve it from AUX_USER_SP
; - K mode: add the offset from current SP where H/w starts auto push
;
; Utilize the fact that Z bit is set if Intr taken in U mode
mov.nz r9, sp
add.nz r9, r9, SZ_PT_REGS - PT_sp - 4
bnz 1f
lr r9, [AUX_USER_SP]
1:
PUSH r9 ; SP
PUSH fp
PUSH gp
#ifdef CONFIG_ARC_CURR_IN_REG
PUSH r25 ; user_r25
GET_CURR_TASK_ON_CPU r25
#else
sub sp, sp, 4
#endif
.ifnc \called_from, exception
sub sp, sp, 12 ; BTA/ECR/orig_r0 placeholder per pt_regs
.endif
.endm
/*------------------------------------------------------------------------*/
.macro INTERRUPT_EPILOGUE called_from
.ifnc \called_from, exception
add sp, sp, 12 ; skip BTA/ECR/orig_r0 placeholderss
.endif
#ifdef CONFIG_ARC_CURR_IN_REG
POP r25
#else
add sp, sp, 4
#endif
POP gp
POP fp
; Don't touch AUX_USER_SP if returning to K mode (Z bit set)
; (Z bit set on K mode is inverse of INTERRUPT_PROLOGUE)
add.z sp, sp, 4
bz 1f
POPAX AUX_USER_SP
1:
POP r12
.endm
/*------------------------------------------------------------------------*/
.macro EXCEPTION_PROLOGUE
; Before jumping to Exception Vector, hardware micro-ops did following:
; 1. SP auto-switched to kernel mode stack
; 2. STATUS32.Z flag set to U mode at time of interrupt (U:1,K:0)
;
; Now manually save the complete reg file
PUSH r9 ; freeup a register: slot of erstatus
PUSHAX eret
sub sp, sp, 12 ; skip JLI, LDI, EI
PUSH lp_count
PUSHAX lp_start
PUSHAX lp_end
PUSH blink
PUSH r11
PUSH r10
ld.as r9, [sp, 10] ; load stashed r9 (status32 stack slot)
lr r10, [erstatus]
st.as r10, [sp, 10] ; save status32 at it's right stack slot
PUSH r9
PUSH r8
PUSH r7
PUSH r6
PUSH r5
PUSH r4
PUSH r3
PUSH r2
PUSH r1
PUSH r0
; -- for interrupts, regs above are auto-saved by h/w in that order --
; Now do what ISR prologue does (manually save r12, sp, fp, gp, r25)
;
; Set Z flag if this was from U mode (expected by INTERRUPT_PROLOGUE)
; Although H/w exception micro-ops do set Z flag for U mode (just like
; for interrupts), it could get clobbered in case we soft land here from
; a TLB Miss exception handler (tlbex.S)
and r10, r10, STATUS_U_MASK
xor.f 0, r10, STATUS_U_MASK
INTERRUPT_PROLOGUE exception
PUSHAX erbta
PUSHAX ecr ; r9 contains ECR, expected by EV_Trap
PUSH r0 ; orig_r0
.endm
/*------------------------------------------------------------------------*/
.macro EXCEPTION_EPILOGUE
; Assumes r0 has PT_status32
btst r0, STATUS_U_BIT ; Z flag set if K, used in INTERRUPT_EPILOGUE
add sp, sp, 8 ; orig_r0/ECR don't need restoring
POPAX erbta
INTERRUPT_EPILOGUE exception
POP r0
POP r1
POP r2
POP r3
POP r4
POP r5
POP r6
POP r7
POP r8
POP r9
POP r10
POP r11
POP blink
POPAX lp_end
POPAX lp_start
POP r9
mov lp_count, r9
add sp, sp, 12 ; skip JLI, LDI, EI
POPAX eret
POPAX erstatus
ld.as r9, [sp, -12] ; reload r9 which got clobbered
.endm
.macro FAKE_RET_FROM_EXCPN
lr r9, [status32]
bic r9, r9, (STATUS_U_MASK|STATUS_DE_MASK|STATUS_AE_MASK)
or r9, r9, (STATUS_L_MASK|STATUS_IE_MASK)
kflag r9
.endm
/* Get thread_info of "current" tsk */
.macro GET_CURR_THR_INFO_FROM_SP reg
bmskn \reg, sp, THREAD_SHIFT - 1
.endm
/* Get CPU-ID of this core */
.macro GET_CPU_ID reg
lr \reg, [identity]
xbfu \reg, \reg, 0xE8 /* 00111 01000 */
/* M = 8-1 N = 8 */
.endm
#endif

307
arch/arc/include/asm/entry-compact.h Normal file
View file

@ -0,0 +1,307 @@
/*
* Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Vineetg: March 2009 (Supporting 2 levels of Interrupts)
* Stack switching code can no longer reliably rely on the fact that
* if we are NOT in user mode, stack is switched to kernel mode.
* e.g. L2 IRQ interrupted a L1 ISR which had not yet completed
* it's prologue including stack switching from user mode
*
* Vineetg: Aug 28th 2008: Bug #94984
* -Zero Overhead Loop Context shd be cleared when entering IRQ/EXcp/Trap
* Normally CPU does this automatically, however when doing FAKE rtie,
* we also need to explicitly do this. The problem in macros
* FAKE_RET_FROM_EXCPN and FAKE_RET_FROM_EXCPN_LOCK_IRQ was that this bit
* was being "CLEARED" rather then "SET". Actually "SET" clears ZOL context
*
* Vineetg: May 5th 2008
* -Modified CALLEE_REG save/restore macros to handle the fact that
* r25 contains the kernel current task ptr
* - Defined Stack Switching Macro to be reused in all intr/excp hdlrs
* - Shaved off 11 instructions from RESTORE_ALL_INT1 by using the
* address Write back load ld.ab instead of seperate ld/add instn
*
* Amit Bhor, Sameer Dhavale: Codito Technologies 2004
*/
#ifndef __ASM_ARC_ENTRY_COMPACT_H
#define __ASM_ARC_ENTRY_COMPACT_H
#include <asm/asm-offsets.h>
#include <asm/irqflags-compact.h>
#include <asm/thread_info.h> /* For THREAD_SIZE */
/*--------------------------------------------------------------
* Switch to Kernel Mode stack if SP points to User Mode stack
*
* Entry : r9 contains pre-IRQ/exception/trap status32
* Exit : SP set to K mode stack
* SP at the time of entry (K/U) saved @ pt_regs->sp
* Clobbers: r9
*-------------------------------------------------------------*/
.macro SWITCH_TO_KERNEL_STK
/* User Mode when this happened ? Yes: Proceed to switch stack */
bbit1 r9, STATUS_U_BIT, 88f
/* OK we were already in kernel mode when this event happened, thus can
* assume SP is kernel mode SP. _NO_ need to do any stack switching
*/
#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
/* However....
* If Level 2 Interrupts enabled, we may end up with a corner case:
* 1. User Task executing
* 2. L1 IRQ taken, ISR starts (CPU auto-switched to KERNEL mode)
* 3. But before it could switch SP from USER to KERNEL stack
* a L2 IRQ "Interrupts" L1
* Thay way although L2 IRQ happened in Kernel mode, stack is still
* not switched.
* To handle this, we may need to switch stack even if in kernel mode
* provided SP has values in range of USER mode stack ( < 0x7000_0000 )
*/
brlo sp, VMALLOC_START, 88f
/* TODO: vineetg:
* We need to be a bit more cautious here. What if a kernel bug in
* L1 ISR, caused SP to go whaco (some small value which looks like
* USER stk) and then we take L2 ISR.
* Above brlo alone would treat it as a valid L1-L2 sceanrio
* instead of shouting alound
* The only feasible way is to make sure this L2 happened in
* L1 prelogue ONLY i.e. ilink2 is less than a pre-set marker in
* L1 ISR before it switches stack
*/
#endif
/*------Intr/Ecxp happened in kernel mode, SP already setup ------ */
/* save it nevertheless @ pt_regs->sp for uniformity */
b.d 66f
st sp, [sp, PT_sp - SZ_PT_REGS]
88: /*------Intr/Ecxp happened in user mode, "switch" stack ------ */
GET_CURR_TASK_ON_CPU r9
/* With current tsk in r9, get it's kernel mode stack base */
GET_TSK_STACK_BASE r9, r9
/* save U mode SP @ pt_regs->sp */
st sp, [r9, PT_sp - SZ_PT_REGS]
/* final SP switch */
mov sp, r9
66:
.endm
/*------------------------------------------------------------
* "FAKE" a rtie to return from CPU Exception context
* This is to re-enable Exceptions within exception
* Look at EV_ProtV to see how this is actually used
*-------------------------------------------------------------*/
.macro FAKE_RET_FROM_EXCPN
ld r9, [sp, PT_status32]
bic r9, r9, (STATUS_U_MASK|STATUS_DE_MASK)
bset r9, r9, STATUS_L_BIT
sr r9, [erstatus]
mov r9, 55f
sr r9, [eret]
rtie
55:
.endm
/*--------------------------------------------------------------
* For early Exception/ISR Prologue, a core reg is temporarily needed to
* code the rest of prolog (stack switching). This is done by stashing
* it to memory (non-SMP case) or SCRATCH0 Aux Reg (SMP).
*
* Before saving the full regfile - this reg is restored back, only
* to be saved again on kernel mode stack, as part of pt_regs.
*-------------------------------------------------------------*/
.macro PROLOG_FREEUP_REG reg, mem
#ifdef CONFIG_SMP
sr \reg, [ARC_REG_SCRATCH_DATA0]
#else
st \reg, [\mem]
#endif
.endm
.macro PROLOG_RESTORE_REG reg, mem
#ifdef CONFIG_SMP
lr \reg, [ARC_REG_SCRATCH_DATA0]
#else
ld \reg, [\mem]
#endif
.endm
/*--------------------------------------------------------------
* Exception Entry prologue
* -Switches stack to K mode (if not already)
* -Saves the register file
*
* After this it is safe to call the "C" handlers
*-------------------------------------------------------------*/
.macro EXCEPTION_PROLOGUE
/* Need at least 1 reg to code the early exception prologue */
PROLOG_FREEUP_REG r9, @ex_saved_reg1
/* U/K mode at time of exception (stack not switched if already K) */
lr r9, [erstatus]
/* ARC700 doesn't provide auto-stack switching */
SWITCH_TO_KERNEL_STK
#ifdef CONFIG_ARC_CURR_IN_REG
/* Treat r25 as scratch reg (save on stack) and load with "current" */
PUSH r25
GET_CURR_TASK_ON_CPU r25
#else
sub sp, sp, 4
#endif
st.a r0, [sp, -8] /* orig_r0 needed for syscall (skip ECR slot) */
sub sp, sp, 4 /* skip pt_regs->sp, already saved above */
/* Restore r9 used to code the early prologue */
PROLOG_RESTORE_REG r9, @ex_saved_reg1
/* now we are ready to save the regfile */
SAVE_R0_TO_R12
PUSH gp
PUSH fp
PUSH blink
PUSHAX eret
PUSHAX erstatus
PUSH lp_count
PUSHAX lp_end
PUSHAX lp_start
PUSHAX erbta
lr r9, [ecr]
st r9, [sp, PT_event] /* EV_Trap expects r9 to have ECR */
.endm
/*--------------------------------------------------------------
* Restore all registers used by system call or Exceptions
* SP should always be pointing to the next free stack element
* when entering this macro.
*
* NOTE:
*
* It is recommended that lp_count/ilink1/ilink2 not be used as a dest reg
* for memory load operations. If used in that way interrupts are deffered
* by hardware and that is not good.
*-------------------------------------------------------------*/
.macro EXCEPTION_EPILOGUE
POPAX erbta
POPAX lp_start
POPAX lp_end
POP r9
mov lp_count, r9 ;LD to lp_count is not allowed
POPAX erstatus
POPAX eret
POP blink
POP fp
POP gp
RESTORE_R12_TO_R0
ld sp, [sp] /* restore original sp */
/* orig_r0, ECR, user_r25 skipped automatically */
.endm
/* Dummy ECR values for Interrupts */
#define event_IRQ1 0x0031abcd
#define event_IRQ2 0x0032abcd
.macro INTERRUPT_PROLOGUE LVL
/* free up r9 as scratchpad */
PROLOG_FREEUP_REG r9, @int\LVL\()_saved_reg
/* Which mode (user/kernel) was the system in when intr occured */
lr r9, [status32_l\LVL\()]
SWITCH_TO_KERNEL_STK
#ifdef CONFIG_ARC_CURR_IN_REG
/* Treat r25 as scratch reg (save on stack) and load with "current" */
PUSH r25
GET_CURR_TASK_ON_CPU r25
#else
sub sp, sp, 4
#endif
PUSH 0x003\LVL\()abcd /* Dummy ECR */
sub sp, sp, 8 /* skip orig_r0 (not needed)
skip pt_regs->sp, already saved above */
/* Restore r9 used to code the early prologue */
PROLOG_RESTORE_REG r9, @int\LVL\()_saved_reg
SAVE_R0_TO_R12
PUSH gp
PUSH fp
PUSH blink
PUSH ilink\LVL\()
PUSHAX status32_l\LVL\()
PUSH lp_count
PUSHAX lp_end
PUSHAX lp_start
PUSHAX bta_l\LVL\()
.endm
/*--------------------------------------------------------------
* Restore all registers used by interrupt handlers.
*
* NOTE:
*
* It is recommended that lp_count/ilink1/ilink2 not be used as a dest reg
* for memory load operations. If used in that way interrupts are deffered
* by hardware and that is not good.
*-------------------------------------------------------------*/
.macro INTERRUPT_EPILOGUE LVL
POPAX bta_l\LVL\()
POPAX lp_start
POPAX lp_end
POP r9
mov lp_count, r9 ;LD to lp_count is not allowed
POPAX status32_l\LVL\()
POP ilink\LVL\()
POP blink
POP fp
POP gp
RESTORE_R12_TO_R0
ld sp, [sp] /* restore original sp */
/* orig_r0, ECR, user_r25 skipped automatically */
.endm
/* Get thread_info of "current" tsk */
.macro GET_CURR_THR_INFO_FROM_SP reg
bic \reg, sp, (THREAD_SIZE - 1)
.endm
/* Get CPU-ID of this core */
.macro GET_CPU_ID reg
lr \reg, [identity]
lsr \reg, \reg, 8
bmsk \reg, \reg, 7
.endm
#endif /* __ASM_ARC_ENTRY_COMPACT_H */

378
arch/arc/include/asm/entry.h
View file

@ -1,45 +1,27 @@
/*
* Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Vineetg: March 2009 (Supporting 2 levels of Interrupts)
* Stack switching code can no longer reliably rely on the fact that
* if we are NOT in user mode, stack is switched to kernel mode.
* e.g. L2 IRQ interrupted a L1 ISR which had not yet completed
* it's prologue including stack switching from user mode
*
* Vineetg: Aug 28th 2008: Bug #94984
* -Zero Overhead Loop Context shd be cleared when entering IRQ/EXcp/Trap
* Normally CPU does this automatically, however when doing FAKE rtie,
* we also need to explicitly do this. The problem in macros
* FAKE_RET_FROM_EXCPN and FAKE_RET_FROM_EXCPN_LOCK_IRQ was that this bit
* was being "CLEARED" rather then "SET". Actually "SET" clears ZOL context
*
* Vineetg: May 5th 2008
* -Modified CALLEE_REG save/restore macros to handle the fact that
* r25 contains the kernel current task ptr
* - Defined Stack Switching Macro to be reused in all intr/excp hdlrs
* - Shaved off 11 instructions from RESTORE_ALL_INT1 by using the
* address Write back load ld.ab instead of seperate ld/add instn
*
* Amit Bhor, Sameer Dhavale: Codito Technologies 2004
*/
#ifndef __ASM_ARC_ENTRY_H
#define __ASM_ARC_ENTRY_H
#ifdef __ASSEMBLY__
#include <asm/unistd.h> /* For NR_syscalls defination */
#include <asm/asm-offsets.h>
#include <asm/arcregs.h>
#include <asm/ptrace.h>
#include <asm/processor.h> /* For VMALLOC_START */
#include <asm/thread_info.h> /* For THREAD_SIZE */
#include <asm/mmu.h>
#ifdef CONFIG_ISA_ARCOMPACT
#include <asm/entry-compact.h> /* ISA specific bits */
#else
#include <asm/entry-arcv2.h>
#endif
/* Note on the LD/ST addr modes with addr reg wback
*
* LD.a same as LD.aw
@ -143,8 +125,6 @@
POP r13
.endm
#define OFF_USER_R25_FROM_R24 (SZ_CALLEE_REGS + SZ_PT_REGS - 8)/4
/*--------------------------------------------------------------
* Collect User Mode callee regs as struct callee_regs - needed by
* fork/do_signal/unaligned-access-emulation.
@ -157,12 +137,13 @@
*-------------------------------------------------------------*/
.macro SAVE_CALLEE_SAVED_USER
mov r12, sp ; save SP as ref to pt_regs
SAVE_R13_TO_R24
#ifdef CONFIG_ARC_CURR_IN_REG
; Retrieve orig r25 and save it on stack
ld.as r12, [sp, OFF_USER_R25_FROM_R24]
st.a r12, [sp, -4]
; Retrieve orig r25 and save it with rest of callee_regs
ld.as r12, [r12, PT_user_r25]
PUSH r12
#else
PUSH r25
#endif
@ -209,12 +190,16 @@
.macro RESTORE_CALLEE_SAVED_USER
#ifdef CONFIG_ARC_CURR_IN_REG
ld.ab r12, [sp, 4]
st.as r12, [sp, OFF_USER_R25_FROM_R24]
POP r12
#else
POP r25
#endif
RESTORE_R24_TO_R13
; SP is back to start of pt_regs
#ifdef CONFIG_ARC_CURR_IN_REG
st.as r12, [sp, PT_user_r25]
#endif
.endm
/*--------------------------------------------------------------
@ -240,117 +225,6 @@
.endm
/*--------------------------------------------------------------
* Switch to Kernel Mode stack if SP points to User Mode stack
*
* Entry : r9 contains pre-IRQ/exception/trap status32
* Exit : SP is set to kernel mode stack pointer
* If CURR_IN_REG, r25 set to "current" task pointer
* Clobbers: r9
*-------------------------------------------------------------*/
.macro SWITCH_TO_KERNEL_STK
/* User Mode when this happened ? Yes: Proceed to switch stack */
bbit1 r9, STATUS_U_BIT, 88f
/* OK we were already in kernel mode when this event happened, thus can
* assume SP is kernel mode SP. _NO_ need to do any stack switching
*/
#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
/* However....
* If Level 2 Interrupts enabled, we may end up with a corner case:
* 1. User Task executing
* 2. L1 IRQ taken, ISR starts (CPU auto-switched to KERNEL mode)
* 3. But before it could switch SP from USER to KERNEL stack
* a L2 IRQ "Interrupts" L1
* Thay way although L2 IRQ happened in Kernel mode, stack is still
* not switched.
* To handle this, we may need to switch stack even if in kernel mode
* provided SP has values in range of USER mode stack ( < 0x7000_0000 )
*/
brlo sp, VMALLOC_START, 88f
/* TODO: vineetg:
* We need to be a bit more cautious here. What if a kernel bug in
* L1 ISR, caused SP to go whaco (some small value which looks like
* USER stk) and then we take L2 ISR.
* Above brlo alone would treat it as a valid L1-L2 sceanrio
* instead of shouting alound
* The only feasible way is to make sure this L2 happened in
* L1 prelogue ONLY i.e. ilink2 is less than a pre-set marker in
* L1 ISR before it switches stack
*/
#endif
/* Save Pre Intr/Exception KERNEL MODE SP on kernel stack
* safe-keeping not really needed, but it keeps the epilogue code
* (SP restore) simpler/uniform.
*/
b.d 66f
mov r9, sp
88: /*------Intr/Ecxp happened in user mode, "switch" stack ------ */
GET_CURR_TASK_ON_CPU r9
/* With current tsk in r9, get it's kernel mode stack base */
GET_TSK_STACK_BASE r9, r9
66:
#ifdef CONFIG_ARC_CURR_IN_REG
/*
* Treat r25 as scratch reg, save it on stack first
* Load it with current task pointer
*/
st r25, [r9, -4]
GET_CURR_TASK_ON_CPU r25
#endif
/* Save Pre Intr/Exception User SP on kernel stack */
st.a sp, [r9, -16] ; Make room for orig_r0, ECR, user_r25
/* CAUTION:
* SP should be set at the very end when we are done with everything
* In case of 2 levels of interrupt we depend on value of SP to assume
* that everything else is done (loading r25 etc)
*/
/* set SP to point to kernel mode stack */
mov sp, r9
/* ----- Stack Switched to kernel Mode, Now save REG FILE ----- */
.endm
/*------------------------------------------------------------
* "FAKE" a rtie to return from CPU Exception context
* This is to re-enable Exceptions within exception
* Look at EV_ProtV to see how this is actually used
*-------------------------------------------------------------*/
.macro FAKE_RET_FROM_EXCPN reg
ld \reg, [sp, PT_status32]
bic \reg, \reg, (STATUS_U_MASK|STATUS_DE_MASK)
bset \reg, \reg, STATUS_L_BIT
sr \reg, [erstatus]
mov \reg, 55f
sr \reg, [eret]
rtie
55:
.endm
/*
* @reg [OUT] &thread_info of "current"
*/
.macro GET_CURR_THR_INFO_FROM_SP reg
bic \reg, sp, (THREAD_SIZE - 1)
.endm
/*
* @reg [OUT] thread_info->flags of "current"
*/
@ -359,222 +233,6 @@
ld \reg, [\reg, THREAD_INFO_FLAGS]
.endm
/*--------------------------------------------------------------
* For early Exception Prologue, a core reg is temporarily needed to
* code the rest of prolog (stack switching). This is done by stashing
* it to memory (non-SMP case) or SCRATCH0 Aux Reg (SMP).
*
* Before saving the full regfile - this reg is restored back, only
* to be saved again on kernel mode stack, as part of pt_regs.
*-------------------------------------------------------------*/
.macro EXCPN_PROLOG_FREEUP_REG reg
#ifdef CONFIG_SMP
sr \reg, [ARC_REG_SCRATCH_DATA0]
#else
st \reg, [@ex_saved_reg1]
#endif
.endm
.macro EXCPN_PROLOG_RESTORE_REG reg
#ifdef CONFIG_SMP
lr \reg, [ARC_REG_SCRATCH_DATA0]
#else
ld \reg, [@ex_saved_reg1]
#endif
.endm
/*--------------------------------------------------------------
* Exception Entry prologue
* -Switches stack to K mode (if not already)
* -Saves the register file
*
* After this it is safe to call the "C" handlers
*-------------------------------------------------------------*/
.macro EXCEPTION_PROLOGUE
/* Need at least 1 reg to code the early exception prologue */
EXCPN_PROLOG_FREEUP_REG r9
/* U/K mode at time of exception (stack not switched if already K) */
lr r9, [erstatus]
/* ARC700 doesn't provide auto-stack switching */
SWITCH_TO_KERNEL_STK
/* save the regfile */
SAVE_ALL_SYS
.endm
/*--------------------------------------------------------------
* Save all registers used by Exceptions (TLB Miss, Prot-V, Mem err etc)
* Requires SP to be already switched to kernel mode Stack
* sp points to the next free element on the stack at exit of this macro.
* Registers are pushed / popped in the order defined in struct ptregs
* in asm/ptrace.h
* Note that syscalls are implemented via TRAP which is also a exception
* from CPU's point of view
*-------------------------------------------------------------*/
.macro SAVE_ALL_SYS
lr r9, [ecr]
st r9, [sp, 8] /* ECR */
st r0, [sp, 4] /* orig_r0, needed only for sys calls */
/* Restore r9 used to code the early prologue */
EXCPN_PROLOG_RESTORE_REG r9
SAVE_R0_TO_R12
PUSH gp
PUSH fp
PUSH blink
PUSHAX eret
PUSHAX erstatus
PUSH lp_count
PUSHAX lp_end
PUSHAX lp_start
PUSHAX erbta
.endm
/*--------------------------------------------------------------
* Restore all registers used by system call or Exceptions
* SP should always be pointing to the next free stack element
* when entering this macro.
*
* NOTE:
*
* It is recommended that lp_count/ilink1/ilink2 not be used as a dest reg
* for memory load operations. If used in that way interrupts are deffered
* by hardware and that is not good.
*-------------------------------------------------------------*/
.macro RESTORE_ALL_SYS
POPAX erbta
POPAX lp_start
POPAX lp_end
POP r9
mov lp_count, r9 ;LD to lp_count is not allowed
POPAX erstatus
POPAX eret
POP blink
POP fp
POP gp
RESTORE_R12_TO_R0
ld sp, [sp] /* restore original sp */
/* orig_r0, ECR, user_r25 skipped automatically */
.endm
/*--------------------------------------------------------------
* Save all registers used by interrupt handlers.
*-------------------------------------------------------------*/
.macro SAVE_ALL_INT1
/* restore original r9 to be saved as part of reg-file */
#ifdef CONFIG_SMP
lr r9, [ARC_REG_SCRATCH_DATA0]
#else
ld r9, [@int1_saved_reg]
#endif
/* now we are ready to save the remaining context :) */
st event_IRQ1, [sp, 8] /* Dummy ECR */
st 0, [sp, 4] /* orig_r0 , N/A for IRQ */
SAVE_R0_TO_R12
PUSH gp
PUSH fp
PUSH blink
PUSH ilink1
PUSHAX status32_l1
PUSH lp_count
PUSHAX lp_end
PUSHAX lp_start
PUSHAX bta_l1
.endm
.macro SAVE_ALL_INT2
/* TODO-vineetg: SMP we can't use global nor can we use
* SCRATCH0 as we do for int1 because while int1 is using
* it, int2 can come
*/
/* retsore original r9 , saved in sys_saved_r9 */
ld r9, [@int2_saved_reg]
/* now we are ready to save the remaining context :) */
st event_IRQ2, [sp, 8] /* Dummy ECR */
st 0, [sp, 4] /* orig_r0 , N/A for IRQ */
SAVE_R0_TO_R12
PUSH gp
PUSH fp
PUSH blink
PUSH ilink2
PUSHAX status32_l2
PUSH lp_count
PUSHAX lp_end
PUSHAX lp_start
PUSHAX bta_l2
.endm
/*--------------------------------------------------------------
* Restore all registers used by interrupt handlers.
*
* NOTE:
*
* It is recommended that lp_count/ilink1/ilink2 not be used as a dest reg
* for memory load operations. If used in that way interrupts are deffered
* by hardware and that is not good.
*-------------------------------------------------------------*/
.macro RESTORE_ALL_INT1
POPAX bta_l1
POPAX lp_start
POPAX lp_end
POP r9
mov lp_count, r9 ;LD to lp_count is not allowed
POPAX status32_l1
POP ilink1
POP blink
POP fp
POP gp
RESTORE_R12_TO_R0
ld sp, [sp] /* restore original sp */
/* orig_r0, ECR, user_r25 skipped automatically */
.endm
.macro RESTORE_ALL_INT2
POPAX bta_l2
POPAX lp_start
POPAX lp_end
POP r9
mov lp_count, r9 ;LD to lp_count is not allowed
POPAX status32_l2
POP ilink2
POP blink
POP fp
POP gp
RESTORE_R12_TO_R0
ld sp, [sp] /* restore original sp */
/* orig_r0, ECR, user_r25 skipped automatically */
.endm
/* Get CPU-ID of this core */
.macro GET_CPU_ID reg
lr \reg, [identity]
lsr \reg, \reg, 8
bmsk \reg, \reg, 7
.endm
#ifdef CONFIG_SMP
/*-------------------------------------------------
@ -643,6 +301,4 @@
#endif /* CONFIG_ARC_CURR_IN_REG */
#endif /* __ASSEMBLY__ */
#endif /* __ASM_ARC_ENTRY_H */

42
arch/arc/include/asm/io.h
View file

@ -99,9 +99,45 @@ static inline void __raw_writel(u32 w, volatile void __iomem *addr)
}
#define readb_relaxed readb
#define readw_relaxed readw
#define readl_relaxed readl
#ifdef CONFIG_ISA_ARCV2
#include <asm/barrier.h>
#define __iormb() rmb()
#define __iowmb() wmb()
#else
#define __iormb() do { } while (0)
#define __iowmb() do { } while (0)
#endif
/*
* MMIO can also get buffered/optimized in micro-arch, so barriers needed
* Based on ARM model for the typical use case
*
* <ST [DMA buffer]>
* <writel MMIO "go" reg>
* or:
* <readl MMIO "status" reg>
* <LD [DMA buffer]>
*
* http://lkml.kernel.org/r/20150622133656.GG1583@arm.com
*/
#define readb(c) ({ u8 __v = readb_relaxed(c); __iormb(); __v; })
#define readw(c) ({ u16 __v = readw_relaxed(c); __iormb(); __v; })
#define readl(c) ({ u32 __v = readl_relaxed(c); __iormb(); __v; })
#define writeb(v,c) ({ __iowmb(); writeb_relaxed(v,c); })
#define writew(v,c) ({ __iowmb(); writew_relaxed(v,c); })
#define writel(v,c) ({ __iowmb(); writel_relaxed(v,c); })
/*
* Relaxed API for drivers which can handle any ordering themselves
*/
#define readb_relaxed(c) __raw_readb(c)
#define readw_relaxed(c) __raw_readw(c)
#define readl_relaxed(c) __raw_readl(c)
#define writeb_relaxed(v,c) __raw_writeb(v,c)
#define writew_relaxed(v,c) __raw_writew(v,c)
#define writel_relaxed(v,c) __raw_writel(v,c)
#include <asm-generic/io.h>

6
arch/arc/include/asm/irq.h
View file

@ -13,8 +13,14 @@
#define NR_IRQS 128 /* allow some CPU external IRQ handling */
/* Platform Independent IRQs */
#ifdef CONFIG_ISA_ARCOMPACT
#define TIMER0_IRQ 3
#define TIMER1_IRQ 4
#else
#define TIMER0_IRQ 16
#define TIMER1_IRQ 17
#define IPI_IRQ 19
#endif
#include <linux/interrupt.h>
#include <asm-generic/irq.h>

124
arch/arc/include/asm/irqflags-arcv2.h Normal file
View file

@ -0,0 +1,124 @@
/*
* Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_IRQFLAGS_ARCV2_H
#define __ASM_IRQFLAGS_ARCV2_H
#include <asm/arcregs.h>
/* status32 Bits */
#define STATUS_AD_BIT 19 /* Disable Align chk: core supports non-aligned */
#define STATUS_IE_BIT 31
#define STATUS_AD_MASK (1<<STATUS_AD_BIT)
#define STATUS_IE_MASK (1<<STATUS_IE_BIT)
#define AUX_USER_SP 0x00D
#define AUX_IRQ_CTRL 0x00E
#define AUX_IRQ_ACT 0x043 /* Active Intr across all levels */
#define AUX_IRQ_LVL_PEND 0x200 /* Pending Intr across all levels */
#define AUX_IRQ_PRIORITY 0x206
#define ICAUSE 0x40a
#define AUX_IRQ_SELECT 0x40b
#define AUX_IRQ_ENABLE 0x40c
/* Was Intr taken in User Mode */
#define AUX_IRQ_ACT_BIT_U 31
/* 0 is highest level, but taken by FIRQs, if present in design */
#define ARCV2_IRQ_DEF_PRIO 0
/* seed value for status register */
#define ISA_INIT_STATUS_BITS (STATUS_IE_MASK | STATUS_AD_MASK | \
(ARCV2_IRQ_DEF_PRIO << 1))
#ifndef __ASSEMBLY__
/*
* Save IRQ state and disable IRQs
*/
static inline long arch_local_irq_save(void)
{
unsigned long flags;
__asm__ __volatile__(" clri %0 \n" : "=r" (flags) : : "memory");
return flags;
}
/*
* restore saved IRQ state
*/
static inline void arch_local_irq_restore(unsigned long flags)
{
__asm__ __volatile__(" seti %0 \n" : : "r" (flags) : "memory");
}
/*
* Unconditionally Enable IRQs
*/
static inline void arch_local_irq_enable(void)
{
unsigned int irqact = read_aux_reg(AUX_IRQ_ACT);
if (irqact & 0xffff)
write_aux_reg(AUX_IRQ_ACT, irqact & ~0xffff);
__asm__ __volatile__(" seti \n" : : : "memory");
}
/*
* Unconditionally Disable IRQs
*/
static inline void arch_local_irq_disable(void)
{
__asm__ __volatile__(" clri \n" : : : "memory");
}
/*
* save IRQ state
*/
static inline long arch_local_save_flags(void)
{
unsigned long temp;
__asm__ __volatile__(
" lr %0, [status32] \n"
: "=&r"(temp)
:
: "memory");
return temp;
}
/*
* Query IRQ state
*/
static inline int arch_irqs_disabled_flags(unsigned long flags)
{
return !(flags & (STATUS_IE_MASK));
}
static inline int arch_irqs_disabled(void)
{
return arch_irqs_disabled_flags(arch_local_save_flags());
}
#else
.macro IRQ_DISABLE scratch
clri
.endm
.macro IRQ_ENABLE scratch
seti
.endm
#endif /* __ASSEMBLY__ */
#endif

183
arch/arc/include/asm/irqflags-compact.h Normal file
View file

@ -0,0 +1,183 @@
/*
* Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_IRQFLAGS_ARCOMPACT_H
#define __ASM_IRQFLAGS_ARCOMPACT_H
/* vineetg: March 2010 : local_irq_save( ) optimisation
* -Remove explicit mov of current status32 into reg, that is not needed
* -Use BIC insn instead of INVERTED + AND
* -Conditionally disable interrupts (if they are not enabled, don't disable)
*/
#include <asm/arcregs.h>
/* status32 Reg bits related to Interrupt Handling */
#define STATUS_E1_BIT 1 /* Int 1 enable */
#define STATUS_E2_BIT 2 /* Int 2 enable */
#define STATUS_A1_BIT 3 /* Int 1 active */
#define STATUS_A2_BIT 4 /* Int 2 active */
#define STATUS_E1_MASK (1<<STATUS_E1_BIT)
#define STATUS_E2_MASK (1<<STATUS_E2_BIT)
#define STATUS_A1_MASK (1<<STATUS_A1_BIT)
#define STATUS_A2_MASK (1<<STATUS_A2_BIT)
#define STATUS_IE_MASK (STATUS_E1_MASK | STATUS_E2_MASK)
/* Other Interrupt Handling related Aux regs */
#define AUX_IRQ_LEV 0x200 /* IRQ Priority: L1 or L2 */
#define AUX_IRQ_HINT 0x201 /* For generating Soft Interrupts */
#define AUX_IRQ_LV12 0x43 /* interrupt level register */
#define AUX_IENABLE 0x40c
#define AUX_ITRIGGER 0x40d
#define AUX_IPULSE 0x415
#define ISA_INIT_STATUS_BITS STATUS_IE_MASK
#ifndef __ASSEMBLY__
/******************************************************************
* IRQ Control Macros
*
* All of them have "memory" clobber (compiler barrier) which is needed to
* ensure that LD/ST requiring irq safetly (R-M-W when LLSC is not available)
* are redone after IRQs are re-enabled (and gcc doesn't reuse stale register)
*
* Noted at the time of Abilis Timer List corruption
* Orig Bug + Rejected solution : https://lkml.org/lkml/2013/3/29/67
* Reasoning : https://lkml.org/lkml/2013/4/8/15
*
******************************************************************/
/*
* Save IRQ state and disable IRQs
*/
static inline long arch_local_irq_save(void)
{
unsigned long temp, flags;
__asm__ __volatile__(
" lr %1, [status32] \n"
" bic %0, %1, %2 \n"
" and.f 0, %1, %2 \n"
" flag.nz %0 \n"
: "=r"(temp), "=r"(flags)
: "n"((STATUS_E1_MASK | STATUS_E2_MASK))
: "memory", "cc");
return flags;
}
/*
* restore saved IRQ state
*/
static inline void arch_local_irq_restore(unsigned long flags)
{
__asm__ __volatile__(
" flag %0 \n"
:
: "r"(flags)
: "memory");
}
/*
* Unconditionally Enable IRQs
*/
extern void arch_local_irq_enable(void);
/*
* Unconditionally Disable IRQs
*/
static inline void arch_local_irq_disable(void)
{
unsigned long temp;
__asm__ __volatile__(
" lr %0, [status32] \n"
" and %0, %0, %1 \n"
" flag %0 \n"
: "=&r"(temp)
: "n"(~(STATUS_E1_MASK | STATUS_E2_MASK))
: "memory");
}
/*
* save IRQ state
*/
static inline long arch_local_save_flags(void)
{
unsigned long temp;
__asm__ __volatile__(
" lr %0, [status32] \n"
: "=&r"(temp)
:
: "memory");
return temp;
}
/*
* Query IRQ state
*/
static inline int arch_irqs_disabled_flags(unsigned long flags)
{
return !(flags & (STATUS_E1_MASK
#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
| STATUS_E2_MASK
#endif
));
}
static inline int arch_irqs_disabled(void)
{
return arch_irqs_disabled_flags(arch_local_save_flags());
}
#else
#ifdef CONFIG_TRACE_IRQFLAGS
.macro TRACE_ASM_IRQ_DISABLE
bl trace_hardirqs_off
.endm
.macro TRACE_ASM_IRQ_ENABLE
bl trace_hardirqs_on
.endm
#else
.macro TRACE_ASM_IRQ_DISABLE
.endm
.macro TRACE_ASM_IRQ_ENABLE
.endm
#endif
.macro IRQ_DISABLE scratch
lr \scratch, [status32]
bic \scratch, \scratch, (STATUS_E1_MASK | STATUS_E2_MASK)
flag \scratch
TRACE_ASM_IRQ_DISABLE
.endm
.macro IRQ_ENABLE scratch
lr \scratch, [status32]
or \scratch, \scratch, (STATUS_E1_MASK | STATUS_E2_MASK)
flag \scratch
TRACE_ASM_IRQ_ENABLE
.endm
#endif /* __ASSEMBLY__ */
#endif

168
arch/arc/include/asm/irqflags.h
View file

@ -1,4 +1,5 @@
/*
* Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
@ -9,171 +10,10 @@
#ifndef __ASM_ARC_IRQFLAGS_H
#define __ASM_ARC_IRQFLAGS_H
/* vineetg: March 2010 : local_irq_save( ) optimisation
* -Remove explicit mov of current status32 into reg, that is not needed
* -Use BIC insn instead of INVERTED + AND
* -Conditionally disable interrupts (if they are not enabled, don't disable)
*/
#include <asm/arcregs.h>
/* status32 Reg bits related to Interrupt Handling */
#define STATUS_E1_BIT 1 /* Int 1 enable */
#define STATUS_E2_BIT 2 /* Int 2 enable */
#define STATUS_A1_BIT 3 /* Int 1 active */
#define STATUS_A2_BIT 4 /* Int 2 active */
#define STATUS_E1_MASK (1<<STATUS_E1_BIT)
#define STATUS_E2_MASK (1<<STATUS_E2_BIT)
#define STATUS_A1_MASK (1<<STATUS_A1_BIT)
#define STATUS_A2_MASK (1<<STATUS_A2_BIT)
/* Other Interrupt Handling related Aux regs */
#define AUX_IRQ_LEV 0x200 /* IRQ Priority: L1 or L2 */
#define AUX_IRQ_HINT 0x201 /* For generating Soft Interrupts */
#define AUX_IRQ_LV12 0x43 /* interrupt level register */
#define AUX_IENABLE 0x40c
#define AUX_ITRIGGER 0x40d
#define AUX_IPULSE 0x415
#ifndef __ASSEMBLY__
/******************************************************************
* IRQ Control Macros
*
* All of them have "memory" clobber (compiler barrier) which is needed to
* ensure that LD/ST requiring irq safetly (R-M-W when LLSC is not available)
* are redone after IRQs are re-enabled (and gcc doesn't reuse stale register)
*
* Noted at the time of Abilis Timer List corruption
* Orig Bug + Rejected solution : https://lkml.org/lkml/2013/3/29/67
* Reasoning : https://lkml.org/lkml/2013/4/8/15
*
******************************************************************/
/*
* Save IRQ state and disable IRQs
*/
static inline long arch_local_irq_save(void)
{
unsigned long temp, flags;
__asm__ __volatile__(
" lr %1, [status32] \n"
" bic %0, %1, %2 \n"
" and.f 0, %1, %2 \n"
" flag.nz %0 \n"
: "=r"(temp), "=r"(flags)
: "n"((STATUS_E1_MASK | STATUS_E2_MASK))
: "memory", "cc");
return flags;
}
/*
* restore saved IRQ state
*/
static inline void arch_local_irq_restore(unsigned long flags)
{
__asm__ __volatile__(
" flag %0 \n"
:
: "r"(flags)
: "memory");
}
/*
* Unconditionally Enable IRQs
*/
extern void arch_local_irq_enable(void);
/*
* Unconditionally Disable IRQs
*/
static inline void arch_local_irq_disable(void)
{
unsigned long temp;
__asm__ __volatile__(
" lr %0, [status32] \n"
" and %0, %0, %1 \n"
" flag %0 \n"
: "=&r"(temp)
: "n"(~(STATUS_E1_MASK | STATUS_E2_MASK))
: "memory");
}
/*
* save IRQ state
*/
static inline long arch_local_save_flags(void)
{
unsigned long temp;
__asm__ __volatile__(
" lr %0, [status32] \n"
: "=&r"(temp)
:
: "memory");
return temp;
}
/*
* Query IRQ state
*/
static inline int arch_irqs_disabled_flags(unsigned long flags)
{
return !(flags & (STATUS_E1_MASK
#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
| STATUS_E2_MASK
#endif
));
}
static inline int arch_irqs_disabled(void)
{
return arch_irqs_disabled_flags(arch_local_save_flags());
}
#ifdef CONFIG_ISA_ARCOMPACT
#include <asm/irqflags-compact.h>
#else
#ifdef CONFIG_TRACE_IRQFLAGS
.macro TRACE_ASM_IRQ_DISABLE
bl trace_hardirqs_off
.endm
.macro TRACE_ASM_IRQ_ENABLE
bl trace_hardirqs_on
.endm
#else
.macro TRACE_ASM_IRQ_DISABLE
.endm
.macro TRACE_ASM_IRQ_ENABLE
.endm
#include <asm/irqflags-arcv2.h>
#endif
.macro IRQ_DISABLE scratch
lr \scratch, [status32]
bic \scratch, \scratch, (STATUS_E1_MASK | STATUS_E2_MASK)
flag \scratch
TRACE_ASM_IRQ_DISABLE
.endm
.macro IRQ_ENABLE scratch
lr \scratch, [status32]
or \scratch, \scratch, (STATUS_E1_MASK | STATUS_E2_MASK)
flag \scratch
TRACE_ASM_IRQ_ENABLE
.endm
#endif /* __ASSEMBLY__ */
#endif

94
arch/arc/include/asm/mcip.h Normal file
View file

@ -0,0 +1,94 @@
/*
* ARConnect IP Support (Multi core enabler: Cross core IPI, RTC ...)
*
* Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_MCIP_H
#define __ASM_MCIP_H
#ifdef CONFIG_ISA_ARCV2
#include <asm/arcregs.h>
#define ARC_REG_MCIP_BCR 0x0d0
#define ARC_REG_MCIP_CMD 0x600
#define ARC_REG_MCIP_WDATA 0x601
#define ARC_REG_MCIP_READBACK 0x602
struct mcip_cmd {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned int pad:8, param:16, cmd:8;
#else
unsigned int cmd:8, param:16, pad:8;
#endif
#define CMD_INTRPT_GENERATE_IRQ 0x01
#define CMD_INTRPT_GENERATE_ACK 0x02
#define CMD_INTRPT_READ_STATUS 0x03
#define CMD_INTRPT_CHECK_SOURCE 0x04
/* Semaphore Commands */
#define CMD_SEMA_CLAIM_AND_READ 0x11
#define CMD_SEMA_RELEASE 0x12
#define CMD_DEBUG_SET_MASK 0x34
#define CMD_DEBUG_SET_SELECT 0x36
#define CMD_GRTC_READ_LO 0x42
#define CMD_GRTC_READ_HI 0x43
#define CMD_IDU_ENABLE 0x71
#define CMD_IDU_DISABLE 0x72
#define CMD_IDU_SET_MODE 0x74
#define CMD_IDU_SET_DEST 0x76
#define CMD_IDU_SET_MASK 0x7C
#define IDU_M_TRIG_LEVEL 0x0
#define IDU_M_TRIG_EDGE 0x1
#define IDU_M_DISTRI_RR 0x0
#define IDU_M_DISTRI_DEST 0x2
};
/*
* MCIP programming model
*
* - Simple commands write {cmd:8,param:16} to MCIP_CMD aux reg
* (param could be irq, common_irq, core_id ...)
* - More involved commands setup MCIP_WDATA with cmd specific data
* before invoking the simple command
*/
static inline void __mcip_cmd(unsigned int cmd, unsigned int param)
{
struct mcip_cmd buf;
buf.pad = 0;
buf.cmd = cmd;
buf.param = param;
WRITE_AUX(ARC_REG_MCIP_CMD, buf);
}
/*
* Setup additional data for a cmd
* Callers need to lock to ensure atomicity
*/
static inline void __mcip_cmd_data(unsigned int cmd, unsigned int param,
unsigned int data)
{
write_aux_reg(ARC_REG_MCIP_WDATA, data);
__mcip_cmd(cmd, param);
}
extern void mcip_init_early_smp(void);
extern void mcip_init_smp(unsigned int cpu);
#endif
#endif

24
arch/arc/include/asm/mmu.h
View file

@ -15,24 +15,41 @@
#define CONFIG_ARC_MMU_VER 2
#elif defined(CONFIG_ARC_MMU_V3)
#define CONFIG_ARC_MMU_VER 3
#elif defined(CONFIG_ARC_MMU_V4)
#define CONFIG_ARC_MMU_VER 4
#endif
/* MMU Management regs */
#define ARC_REG_MMU_BCR 0x06f
#if (CONFIG_ARC_MMU_VER < 4)
#define ARC_REG_TLBPD0 0x405
#define ARC_REG_TLBPD1 0x406
#define ARC_REG_TLBINDEX 0x407
#define ARC_REG_TLBCOMMAND 0x408
#define ARC_REG_PID 0x409
#define ARC_REG_SCRATCH_DATA0 0x418
#else
#define ARC_REG_TLBPD0 0x460
#define ARC_REG_TLBPD1 0x461
#define ARC_REG_TLBINDEX 0x464
#define ARC_REG_TLBCOMMAND 0x465
#define ARC_REG_PID 0x468
#define ARC_REG_SCRATCH_DATA0 0x46c
#endif
/* Bits in MMU PID register */
#define MMU_ENABLE (1 << 31) /* Enable MMU for process */
#define __TLB_ENABLE (1 << 31)
#define __PROG_ENABLE (1 << 30)
#define MMU_ENABLE (__TLB_ENABLE | __PROG_ENABLE)
/* Error code if probe fails */
#define TLB_LKUP_ERR 0x80000000
#if (CONFIG_ARC_MMU_VER < 4)
#define TLB_DUP_ERR (TLB_LKUP_ERR | 0x00000001)
#else
#define TLB_DUP_ERR (TLB_LKUP_ERR | 0x40000000)
#endif
/* TLB Commands */
#define TLBWrite 0x1
@ -45,6 +62,11 @@
#define TLBIVUTLB 0x6 /* explicitly inv uTLBs */
#endif
#if (CONFIG_ARC_MMU_VER >= 4)
#define TLBInsertEntry 0x7
#define TLBDeleteEntry 0x8
#endif
#ifndef __ASSEMBLY__
typedef struct {

10
arch/arc/include/asm/pgtable.h
View file

@ -72,8 +72,18 @@
#define _PAGE_READ (1<<3) /* Page has user read perm (H) */
#define _PAGE_ACCESSED (1<<4) /* Page is accessed (S) */
#define _PAGE_MODIFIED (1<<5) /* Page modified (dirty) (S) */
#if (CONFIG_ARC_MMU_VER >= 4)
#define _PAGE_WTHRU (1<<7) /* Page cache mode write-thru (H) */
#endif
#define _PAGE_GLOBAL (1<<8) /* Page is global (H) */
#define _PAGE_PRESENT (1<<9) /* TLB entry is valid (H) */
#if (CONFIG_ARC_MMU_VER >= 4)
#define _PAGE_SZ (1<<10) /* Page Size indicator (H) */
#endif
#define _PAGE_SHARED_CODE (1<<11) /* Shared Code page with cmn vaddr
usable for shared TLB entries (H) */
#endif

37
arch/arc/include/asm/processor.h
View file

@ -77,7 +77,7 @@ struct task_struct;
*/
#define TSK_K_ESP(tsk) (tsk->thread.ksp)
#define TSK_K_REG(tsk, off) (*((unsigned int *)(TSK_K_ESP(tsk) + \
#define TSK_K_REG(tsk, off) (*((unsigned long *)(TSK_K_ESP(tsk) + \
sizeof(struct callee_regs) + off)))
#define TSK_K_BLINK(tsk) TSK_K_REG(tsk, 4)
@ -100,29 +100,26 @@ extern unsigned int get_wchan(struct task_struct *p);
#endif /* !__ASSEMBLY__ */
/* Kernels Virtual memory area.
* Unlike other architectures(MIPS, sh, cris ) ARC 700 does not have a
* "kernel translated" region (like KSEG2 in MIPS). So we use a upper part
* of the translated bottom 2GB for kernel virtual memory and protect
* these pages from user accesses by disabling Ru, Eu and Wu.
/*
* System Memory Map on ARC
*
* ---------------------------- (lower 2G, Translated) -------------------------
* 0x0000_0000 0x5FFF_FFFF (user vaddr: TASK_SIZE)
* 0x6000_0000 0x6FFF_FFFF (reserved gutter between U/K)
* 0x7000_0000 0x7FFF_FFFF (kvaddr: vmalloc/modules/pkmap..)
*
* PAGE_OFFSET ---------------- (Upper 2G, Untranslated) -----------------------
* 0x8000_0000 0xBFFF_FFFF (kernel direct mapped)
* 0xC000_0000 0xFFFF_FFFF (peripheral uncached space)
* -----------------------------------------------------------------------------
*/
#define VMALLOC_SIZE (0x10000000) /* 256M */
#define VMALLOC_START (PAGE_OFFSET - VMALLOC_SIZE)
#define VMALLOC_END (PAGE_OFFSET)
#define VMALLOC_START 0x70000000
#define VMALLOC_SIZE (PAGE_OFFSET - VMALLOC_START)
#define VMALLOC_END (VMALLOC_START + VMALLOC_SIZE)
/* Most of the architectures seem to be keeping some kind of padding between
* userspace TASK_SIZE and PAGE_OFFSET. i.e TASK_SIZE != PAGE_OFFSET.
*/
#define USER_KERNEL_GUTTER 0x10000000
/* User address space:
* On ARC700, CPU allows the entire lower half of 32 bit address space to be
* translated. Thus potentially 2G (0:0x7FFF_FFFF) could be User vaddr space.
* However we steal 256M for kernel addr (0x7000_0000:0x7FFF_FFFF) and another
* 256M (0x6000_0000:0x6FFF_FFFF) is gutter between user/kernel spaces
* Thus total User vaddr space is (0:0x5FFF_FFFF)
*/
#define TASK_SIZE (PAGE_OFFSET - VMALLOC_SIZE - USER_KERNEL_GUTTER)
#define TASK_SIZE (VMALLOC_START - USER_KERNEL_GUTTER)
#define STACK_TOP TASK_SIZE
#define STACK_TOP_MAX STACK_TOP

43
arch/arc/include/asm/ptrace.h
View file

@ -16,6 +16,7 @@
/* THE pt_regs: Defines how regs are saved during entry into kernel */
#ifdef CONFIG_ISA_ARCOMPACT
struct pt_regs {
/* Real registers */
@ -56,6 +57,48 @@ struct pt_regs {
long user_r25;
};
#else
struct pt_regs {
long orig_r0;
union {
struct {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned long state:8, ecr_vec:8,
ecr_cause:8, ecr_param:8;
#else
unsigned long ecr_param:8, ecr_cause:8,
ecr_vec:8, state:8;
#endif
};
unsigned long event;
};
long bta; /* bta_l1, bta_l2, erbta */
long user_r25;
long r26; /* gp */
long fp;
long sp; /* user/kernel sp depending on where we came from */
long r12;
/*------- Below list auto saved by h/w -----------*/
long r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11;
long blink;
long lp_end, lp_start, lp_count;
long ei, ldi, jli;
long ret;
long status32;
};
#endif
/* Callee saved registers - need to be saved only when you are scheduled out */

32
arch/arc/include/asm/spinlock.h
View file

@ -22,24 +22,46 @@ static inline void arch_spin_lock(arch_spinlock_t *lock)
{
unsigned int tmp = __ARCH_SPIN_LOCK_LOCKED__;
/*
* This smp_mb() is technically superfluous, we only need the one
* after the lock for providing the ACQUIRE semantics.
* However doing the "right" thing was regressing hackbench
* so keeping this, pending further investigation
*/
smp_mb();
__asm__ __volatile__(
"1: ex %0, [%1] \n"
" breq %0, %2, 1b \n"
: "+&r" (tmp)
: "r"(&(lock->slock)), "ir"(__ARCH_SPIN_LOCK_LOCKED__)
: "memory");
/*
* ACQUIRE barrier to ensure load/store after taking the lock
* don't "bleed-up" out of the critical section (leak-in is allowed)
* http://www.spinics.net/lists/kernel/msg2010409.html
*
* ARCv2 only has load-load, store-store and all-all barrier
* thus need the full all-all barrier
*/
smp_mb();
}
static inline int arch_spin_trylock(arch_spinlock_t *lock)
{
unsigned int tmp = __ARCH_SPIN_LOCK_LOCKED__;
smp_mb();
__asm__ __volatile__(
"1: ex %0, [%1] \n"
: "+r" (tmp)
: "r"(&(lock->slock))
: "memory");
smp_mb();
return (tmp == __ARCH_SPIN_LOCK_UNLOCKED__);
}
@ -47,12 +69,22 @@ static inline void arch_spin_unlock(arch_spinlock_t *lock)
{
unsigned int tmp = __ARCH_SPIN_LOCK_UNLOCKED__;
/*
* RELEASE barrier: given the instructions avail on ARCv2, full barrier
* is the only option
*/
smp_mb();
__asm__ __volatile__(
" ex %0, [%1] \n"
: "+r" (tmp)
: "r"(&(lock->slock))
: "memory");
/*
* superfluous, but keeping for now - see pairing version in
* arch_spin_lock above
*/
smp_mb();
}

1
arch/arc/include/asm/thread_info.h
View file

@ -25,6 +25,7 @@
#endif
#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
#define THREAD_SHIFT (PAGE_SHIFT << THREAD_SIZE_ORDER)
#ifndef __ASSEMBLY__

17
arch/arc/include/asm/uaccess.h
View file

@ -659,31 +659,30 @@ static inline unsigned long __arc_clear_user(void __user *to, unsigned long n)
static inline long
__arc_strncpy_from_user(char *dst, const char __user *src, long count)
{
long res = count;
long res = 0;
char val;
unsigned int hw_count;
if (count == 0)
return 0;
__asm__ __volatile__(
" lp 2f \n"
" lp 3f \n"
"1: ldb.ab %3, [%2, 1] \n"
" breq.d %3, 0, 2f \n"
" breq.d %3, 0, 3f \n"
" stb.ab %3, [%1, 1] \n"
"2: sub %0, %6, %4 \n"
"3: ;nop \n"
" add %0, %0, 1 # Num of NON NULL bytes copied \n"
"3: \n"
" .section .fixup, \"ax\" \n"
" .align 4 \n"
"4: mov %0, %5 \n"
"4: mov %0, %4 # sets @res as -EFAULT \n"
" j 3b \n"
" .previous \n"
" .section __ex_table, \"a\" \n"
" .align 4 \n"
" .word 1b, 4b \n"
" .previous \n"
: "=r"(res), "+r"(dst), "+r"(src), "=&r"(val), "=l"(hw_count)
: "g"(-EFAULT), "ir"(count), "4"(count) /* this "4" seeds lp_count */
: "+r"(res), "+r"(dst), "+r"(src), "=r"(val)
: "g"(-EFAULT), "l"(count)
: "memory");
return res;

2
arch/arc/include/uapi/asm/page.h
View file

@ -30,7 +30,7 @@
#define PAGE_OFFSET (0x80000000)
#else
#define PAGE_SIZE (1UL << PAGE_SHIFT) /* Default 8K */
#define PAGE_OFFSET (0x80000000UL) /* Kernel starts at 2G onwards */
#define PAGE_OFFSET (0x80000000UL) /* Kernel starts at 2G onwards */
#endif
#define PAGE_MASK (~(PAGE_SIZE-1))

6
arch/arc/kernel/Makefile
View file

@ -8,12 +8,14 @@
# Pass UTS_MACHINE for user_regset definition
CFLAGS_ptrace.o += -DUTS_MACHINE='"$(UTS_MACHINE)"'
obj-y := arcksyms.o setup.o irq.o time.o reset.o ptrace.o entry.o process.o
obj-y := arcksyms.o setup.o irq.o time.o reset.o ptrace.o process.o devtree.o
obj-y += signal.o traps.o sys.o troubleshoot.o stacktrace.o disasm.o clk.o
obj-y += devtree.o
obj-$(CONFIG_ISA_ARCOMPACT) += entry-compact.o intc-compact.o
obj-$(CONFIG_ISA_ARCV2) += entry-arcv2.o intc-arcv2.o
obj-$(CONFIG_MODULES) += arcksyms.o module.o
obj-$(CONFIG_SMP) += smp.o
obj-$(CONFIG_ARC_MCIP) += mcip.o
obj-$(CONFIG_ARC_DW2_UNWIND) += unwind.o
obj-$(CONFIG_KPROBES) += kprobes.o
obj-$(CONFIG_ARC_EMUL_UNALIGNED) += unaligned.o

5
arch/arc/kernel/asm-offsets.c
View file

@ -37,6 +37,8 @@ int main(void)
DEFINE(TASK_ACT_MM, offsetof(struct task_struct, active_mm));
DEFINE(TASK_TGID, offsetof(struct task_struct, tgid));
DEFINE(TASK_PID, offsetof(struct task_struct, pid));
DEFINE(TASK_COMM, offsetof(struct task_struct, comm));
DEFINE(MM_CTXT, offsetof(struct mm_struct, context));
DEFINE(MM_PGD, offsetof(struct mm_struct, pgd));
@ -56,8 +58,11 @@ int main(void)
DEFINE(PT_r5, offsetof(struct pt_regs, r5));
DEFINE(PT_r6, offsetof(struct pt_regs, r6));
DEFINE(PT_r7, offsetof(struct pt_regs, r7));
DEFINE(PT_ret, offsetof(struct pt_regs, ret));
DEFINE(SZ_CALLEE_REGS, sizeof(struct callee_regs));
DEFINE(SZ_PT_REGS, sizeof(struct pt_regs));
DEFINE(PT_user_r25, offsetof(struct pt_regs, user_r25));
return 0;
}

2
arch/arc/kernel/devtree.c
View file

@ -32,6 +32,8 @@ static void __init arc_set_early_base_baud(unsigned long dt_root)
if (of_flat_dt_is_compatible(dt_root, "abilis,arc-tb10x"))
arc_base_baud = core_clk/3;
else if (of_flat_dt_is_compatible(dt_root, "snps,arc-sdp"))
arc_base_baud = 33333333; /* Fixed 33MHz clk (AXS10x) */
else
arc_base_baud = core_clk;
}

239
arch/arc/kernel/entry-arcv2.S Normal file
View file

@ -0,0 +1,239 @@
/*
* ARCv2 ISA based core Low Level Intr/Traps/Exceptions(non-TLB) Handling
*
* Copyright (C) 2013 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/linkage.h> /* ARC_{EXTRY,EXIT} */
#include <asm/entry.h> /* SAVE_ALL_{INT1,INT2,TRAP...} */
#include <asm/errno.h>
#include <asm/arcregs.h>
#include <asm/irqflags.h>
.cpu HS
#define VECTOR .word
;############################ Vector Table #################################
.section .vector,"a",@progbits
.align 4
# Initial 16 slots are Exception Vectors
VECTOR stext ; Restart Vector (jump to entry point)
VECTOR mem_service ; Mem exception
VECTOR instr_service ; Instrn Error
VECTOR EV_MachineCheck ; Fatal Machine check
VECTOR EV_TLBMissI ; Intruction TLB miss
VECTOR EV_TLBMissD ; Data TLB miss
VECTOR EV_TLBProtV ; Protection Violation
VECTOR EV_PrivilegeV ; Privilege Violation
VECTOR EV_SWI ; Software Breakpoint
VECTOR EV_Trap ; Trap exception
VECTOR EV_Extension ; Extn Instruction Exception
VECTOR EV_DivZero ; Divide by Zero
VECTOR EV_DCError ; Data Cache Error
VECTOR EV_Misaligned ; Misaligned Data Access
VECTOR reserved ; Reserved slots
VECTOR reserved ; Reserved slots
# Begin Interrupt Vectors
VECTOR handle_interrupt ; (16) Timer0
VECTOR handle_interrupt ; unused (Timer1)
VECTOR handle_interrupt ; unused (WDT)
VECTOR handle_interrupt ; (19) ICI (inter core interrupt)
VECTOR handle_interrupt
VECTOR handle_interrupt
VECTOR handle_interrupt
VECTOR handle_interrupt ; (23) End of fixed IRQs
.rept CONFIG_ARC_NUMBER_OF_INTERRUPTS - 8
VECTOR handle_interrupt
.endr
.section .text, "ax",@progbits
res_service: ; processor restart
flag 0x1 ; not implemented
nop
nop
reserved: ; processor restart
rtie ; jump to processor initializations
;##################### Interrupt Handling ##############################
ENTRY(handle_interrupt)
INTERRUPT_PROLOGUE irq
clri ; To make status32.IE agree with CPU internal state
lr r0, [ICAUSE]
mov blink, ret_from_exception
b.d arch_do_IRQ
mov r1, sp
END(handle_interrupt)
;################### Non TLB Exception Handling #############################
ENTRY(EV_SWI)
flag 1
END(EV_SWI)
ENTRY(EV_DivZero)
flag 1
END(EV_DivZero)
ENTRY(EV_DCError)
flag 1
END(EV_DCError)
ENTRY(EV_Misaligned)
EXCEPTION_PROLOGUE
lr r0, [efa] ; Faulting Data address
mov r1, sp
FAKE_RET_FROM_EXCPN
SAVE_CALLEE_SAVED_USER
mov r2, sp ; callee_regs
bl do_misaligned_access
; TBD: optimize - do this only if a callee reg was involved
; either a dst of emulated LD/ST or src with address-writeback
RESTORE_CALLEE_SAVED_USER
b ret_from_exception
END(EV_Misaligned)
; ---------------------------------------------
; Protection Violation Exception Handler
; ---------------------------------------------
ENTRY(EV_TLBProtV)
EXCEPTION_PROLOGUE
lr r0, [efa] ; Faulting Data address
mov r1, sp ; pt_regs
FAKE_RET_FROM_EXCPN
mov blink, ret_from_exception
b do_page_fault
END(EV_TLBProtV)
; From Linux standpoint Slow Path I/D TLB Miss is same a ProtV as they
; need to call do_page_fault().
; ECR in pt_regs provides whether access was R/W/X
.global call_do_page_fault
.set call_do_page_fault, EV_TLBProtV
;############# Common Handlers for ARCompact and ARCv2 ##############
#include "entry.S"
;############# Return from Intr/Excp/Trap (ARCv2 ISA Specifics) ##############
;
; Restore the saved sys context (common exit-path for EXCPN/IRQ/Trap)
; IRQ shd definitely not happen between now and rtie
; All 2 entry points to here already disable interrupts
.Lrestore_regs:
ld r0, [sp, PT_status32] ; U/K mode at time of entry
lr r10, [AUX_IRQ_ACT]
bmsk r11, r10, 15 ; AUX_IRQ_ACT.ACTIVE
breq r11, 0, .Lexcept_ret ; No intr active, ret from Exception
;####### Return from Intr #######
debug_marker_l1:
bbit1.nt r0, STATUS_DE_BIT, .Lintr_ret_to_delay_slot
.Lisr_ret_fast_path:
; Handle special case #1: (Entry via Exception, Return via IRQ)
;
; Exception in U mode, preempted in kernel, Intr taken (K mode), orig
; task now returning to U mode (riding the Intr)
; AUX_IRQ_ACTIVE won't have U bit set (since intr in K mode), hence SP
; won't be switched to correct U mode value (from AUX_SP)
; So force AUX_IRQ_ACT.U for such a case
btst r0, STATUS_U_BIT ; Z flag set if K (Z clear for U)
bset.nz r11, r11, AUX_IRQ_ACT_BIT_U ; NZ means U
sr r11, [AUX_IRQ_ACT]
INTERRUPT_EPILOGUE irq
rtie
;####### Return from Exception / pure kernel mode #######
.Lexcept_ret: ; Expects r0 has PT_status32
debug_marker_syscall:
EXCEPTION_EPILOGUE
rtie
;####### Return from Intr to insn in delay slot #######
; Handle special case #2: (Entry via Exception in Delay Slot, Return via IRQ)
;
; Intr returning to a Delay Slot (DS) insn
; (since IRQ NOT allowed in DS in ARCv2, this can only happen if orig
; entry was via Exception in DS which got preempted in kernel).
;
; IRQ RTIE won't reliably restore DE bit and/or BTA, needs handling
.Lintr_ret_to_delay_slot:
debug_marker_ds:
ld r2, [@intr_to_DE_cnt]
add r2, r2, 1
st r2, [@intr_to_DE_cnt]
ld r2, [sp, PT_ret]
ld r3, [sp, PT_status32]
bic r0, r3, STATUS_U_MASK|STATUS_DE_MASK|STATUS_IE_MASK|STATUS_L_MASK
st r0, [sp, PT_status32]
mov r1, .Lintr_ret_to_delay_slot_2
st r1, [sp, PT_ret]
st r2, [sp, 0]
st r3, [sp, 4]
b .Lisr_ret_fast_path
.Lintr_ret_to_delay_slot_2:
sub sp, sp, SZ_PT_REGS
st r9, [sp, -4]
ld r9, [sp, 0]
sr r9, [eret]
ld r9, [sp, 4]
sr r9, [erstatus]
ld r9, [sp, 8]
sr r9, [erbta]
ld r9, [sp, -4]
add sp, sp, SZ_PT_REGS
rtie
END(ret_from_exception)

393
arch/arc/kernel/entry-compact.S Normal file
View file

@ -0,0 +1,393 @@
/*
* Low Level Interrupts/Traps/Exceptions(non-TLB) Handling for ARCompact ISA
*
* Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* vineetg: May 2011
* -Userspace unaligned access emulation
*
* vineetg: Feb 2011 (ptrace low level code fixes)
* -traced syscall return code (r0) was not saved into pt_regs for restoring
* into user reg-file when traded task rets to user space.
* -syscalls needing arch-wrappers (mainly for passing sp as pt_regs)
* were not invoking post-syscall trace hook (jumping directly into
* ret_from_system_call)
*
* vineetg: Nov 2010:
* -Vector table jumps (@8 bytes) converted into branches (@4 bytes)
* -To maintain the slot size of 8 bytes/vector, added nop, which is
* not executed at runtime.
*
* vineetg: Nov 2009 (Everything needed for TIF_RESTORE_SIGMASK)
* -do_signal()invoked upon TIF_RESTORE_SIGMASK as well
* -Wrappers for sys_{,rt_}sigsuspend() nolonger needed as they don't
* need ptregs anymore
*
* Vineetg: Oct 2009
* -In a rare scenario, Process gets a Priv-V exception and gets scheduled
* out. Since we don't do FAKE RTIE for Priv-V, CPU excpetion state remains
* active (AE bit enabled). This causes a double fault for a subseq valid
* exception. Thus FAKE RTIE needed in low level Priv-Violation handler.
* Instr Error could also cause similar scenario, so same there as well.
*
* Vineetg: March 2009 (Supporting 2 levels of Interrupts)
*
* Vineetg: Aug 28th 2008: Bug #94984
* -Zero Overhead Loop Context shd be cleared when entering IRQ/EXcp/Trap
* Normally CPU does this automatically, however when doing FAKE rtie,
* we need to explicitly do this. The problem in macros
* FAKE_RET_FROM_EXCPN and FAKE_RET_FROM_EXCPN_LOCK_IRQ was that this bit
* was being "CLEARED" rather then "SET". Since it is Loop INHIBIT Bit,
* setting it and not clearing it clears ZOL context
*
* Vineetg: May 16th, 2008
* - r25 now contains the Current Task when in kernel
*
* Vineetg: Dec 22, 2007
* Minor Surgery of Low Level ISR to make it SMP safe
* - MMU_SCRATCH0 Reg used for freeing up r9 in Level 1 ISR
* - _current_task is made an array of NR_CPUS
* - Access of _current_task wrapped inside a macro so that if hardware
* team agrees for a dedicated reg, no other code is touched
*
* Amit Bhor, Rahul Trivedi, Kanika Nema, Sameer Dhavale : Codito Tech 2004
*/
#include <linux/errno.h>
#include <linux/linkage.h> /* {EXTRY,EXIT} */
#include <asm/entry.h>
#include <asm/irqflags.h>
.cpu A7
;############################ Vector Table #################################
.macro VECTOR lbl
#if 1 /* Just in case, build breaks */
j \lbl
#else
b \lbl
nop
#endif
.endm
.section .vector, "ax",@progbits
.align 4
/* Each entry in the vector table must occupy 2 words. Since it is a jump
* across sections (.vector to .text) we are gauranteed that 'j somewhere'
* will use the 'j limm' form of the intrsuction as long as somewhere is in
* a section other than .vector.
*/
; ********* Critical System Events **********************
VECTOR res_service ; 0x0, Restart Vector (0x0)
VECTOR mem_service ; 0x8, Mem exception (0x1)
VECTOR instr_service ; 0x10, Instrn Error (0x2)
; ******************** Device ISRs **********************
#ifdef CONFIG_ARC_IRQ3_LV2
VECTOR handle_interrupt_level2
#else
VECTOR handle_interrupt_level1
#endif
VECTOR handle_interrupt_level1
#ifdef CONFIG_ARC_IRQ5_LV2
VECTOR handle_interrupt_level2
#else
VECTOR handle_interrupt_level1
#endif
#ifdef CONFIG_ARC_IRQ6_LV2
VECTOR handle_interrupt_level2
#else
VECTOR handle_interrupt_level1
#endif
.rept 25
VECTOR handle_interrupt_level1 ; Other devices
.endr
/* FOR ARC600: timer = 0x3, uart = 0x8, emac = 0x10 */
; ******************** Exceptions **********************
VECTOR EV_MachineCheck ; 0x100, Fatal Machine check (0x20)
VECTOR EV_TLBMissI ; 0x108, Intruction TLB miss (0x21)
VECTOR EV_TLBMissD ; 0x110, Data TLB miss (0x22)
VECTOR EV_TLBProtV ; 0x118, Protection Violation (0x23)
; or Misaligned Access
VECTOR EV_PrivilegeV ; 0x120, Privilege Violation (0x24)
VECTOR EV_Trap ; 0x128, Trap exception (0x25)
VECTOR EV_Extension ; 0x130, Extn Intruction Excp (0x26)
.rept 24
VECTOR reserved ; Reserved Exceptions
.endr
;##################### Scratch Mem for IRQ stack switching #############
ARCFP_DATA int1_saved_reg
.align 32
.type int1_saved_reg, @object
.size int1_saved_reg, 4
int1_saved_reg:
.zero 4
/* Each Interrupt level needs its own scratch */
#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
ARCFP_DATA int2_saved_reg
.type int2_saved_reg, @object
.size int2_saved_reg, 4
int2_saved_reg:
.zero 4
#endif
; ---------------------------------------------
.section .text, "ax",@progbits
res_service: ; processor restart
flag 0x1 ; not implemented
nop
nop
reserved: ; processor restart
rtie ; jump to processor initializations
;##################### Interrupt Handling ##############################
#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
; ---------------------------------------------
; Level 2 ISR: Can interrupt a Level 1 ISR
; ---------------------------------------------
ENTRY(handle_interrupt_level2)
INTERRUPT_PROLOGUE 2
;------------------------------------------------------
; if L2 IRQ interrupted a L1 ISR, disable preemption
;------------------------------------------------------
ld r9, [sp, PT_status32] ; get statu32_l2 (saved in pt_regs)
bbit0 r9, STATUS_A1_BIT, 1f ; L1 not active when L2 IRQ, so normal
; A1 is set in status32_l2
; bump thread_info->preempt_count (Disable preemption)
GET_CURR_THR_INFO_FROM_SP r10
ld r9, [r10, THREAD_INFO_PREEMPT_COUNT]
add r9, r9, 1
st r9, [r10, THREAD_INFO_PREEMPT_COUNT]
1:
;------------------------------------------------------
; setup params for Linux common ISR and invoke it
;------------------------------------------------------
lr r0, [icause2]
and r0, r0, 0x1f
bl.d @arch_do_IRQ
mov r1, sp
mov r8,0x2
sr r8, [AUX_IRQ_LV12] ; clear bit in Sticky Status Reg
b ret_from_exception
END(handle_interrupt_level2)
#endif
; ---------------------------------------------
; Level 1 ISR
; ---------------------------------------------
ENTRY(handle_interrupt_level1)
INTERRUPT_PROLOGUE 1
lr r0, [icause1]
and r0, r0, 0x1f
#ifdef CONFIG_TRACE_IRQFLAGS
; icause1 needs to be read early, before calling tracing, which
; can clobber scratch regs, hence use of stack to stash it
push r0
TRACE_ASM_IRQ_DISABLE
pop r0
#endif
bl.d @arch_do_IRQ
mov r1, sp
mov r8,0x1
sr r8, [AUX_IRQ_LV12] ; clear bit in Sticky Status Reg
b ret_from_exception
END(handle_interrupt_level1)
;################### Non TLB Exception Handling #############################
; ---------------------------------------------
; Protection Violation Exception Handler
; ---------------------------------------------
ENTRY(EV_TLBProtV)
EXCEPTION_PROLOGUE
lr r2, [ecr]
lr r0, [efa] ; Faulting Data address (not part of pt_regs saved above)
; Exception auto-disables further Intr/exceptions.
; Re-enable them by pretending to return from exception
; (so rest of handler executes in pure K mode)
FAKE_RET_FROM_EXCPN
mov r1, sp ; Handle to pt_regs
;------ (5) Type of Protection Violation? ----------
;
; ProtV Hardware Exception is triggered for Access Faults of 2 types
; -Access Violaton : 00_23_(00|01|02|03)_00
; x r w r+w
; -Unaligned Access : 00_23_04_00
;
bbit1 r2, ECR_C_BIT_PROTV_MISALIG_DATA, 4f
;========= (6a) Access Violation Processing ========
bl do_page_fault
b ret_from_exception
;========== (6b) Non aligned access ============
4:
SAVE_CALLEE_SAVED_USER
mov r2, sp ; callee_regs
bl do_misaligned_access
; TBD: optimize - do this only if a callee reg was involved
; either a dst of emulated LD/ST or src with address-writeback
RESTORE_CALLEE_SAVED_USER
b ret_from_exception
END(EV_TLBProtV)
; Wrapper for Linux page fault handler called from EV_TLBMiss*
; Very similar to ProtV handler case (6a) above, but avoids the extra checks
; for Misaligned access
;
ENTRY(call_do_page_fault)
EXCEPTION_PROLOGUE
lr r0, [efa] ; Faulting Data address
mov r1, sp
FAKE_RET_FROM_EXCPN
mov blink, ret_from_exception
b do_page_fault
END(call_do_page_fault)
;############# Common Handlers for ARCompact and ARCv2 ##############
#include "entry.S"
;############# Return from Intr/Excp/Trap (ARC Specifics) ##############
;
; Restore the saved sys context (common exit-path for EXCPN/IRQ/Trap)
; IRQ shd definitely not happen between now and rtie
; All 2 entry points to here already disable interrupts
.Lrestore_regs:
TRACE_ASM_IRQ_ENABLE
lr r10, [status32]
; Restore REG File. In case multiple Events outstanding,
; use the same priorty as rtie: EXCPN, L2 IRQ, L1 IRQ, None
; Note that we use realtime STATUS32 (not pt_regs->status32) to
; decide that.
; if Returning from Exception
btst r10, STATUS_AE_BIT
bnz .Lexcep_ret
; Not Exception so maybe Interrupts (Level 1 or 2)
#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
; Level 2 interrupt return Path - from hardware standpoint
bbit0 r10, STATUS_A2_BIT, not_level2_interrupt
;------------------------------------------------------------------
; However the context returning might not have taken L2 intr itself
; e.g. Task'A' user-code -> L2 intr -> schedule -> 'B' user-code ret
; Special considerations needed for the context which took L2 intr
ld r9, [sp, PT_event] ; Ensure this is L2 intr context
brne r9, event_IRQ2, 149f
;------------------------------------------------------------------
; if L2 IRQ interrupted an L1 ISR, we'd disabled preemption earlier
; so that sched doesn't move to new task, causing L1 to be delayed
; undeterministically. Now that we've achieved that, let's reset
; things to what they were, before returning from L2 context
;----------------------------------------------------------------
ld r9, [sp, PT_status32] ; get statu32_l2 (saved in pt_regs)
bbit0 r9, STATUS_A1_BIT, 149f ; L1 not active when L2 IRQ, so normal
; decrement thread_info->preempt_count (re-enable preemption)
GET_CURR_THR_INFO_FROM_SP r10
ld r9, [r10, THREAD_INFO_PREEMPT_COUNT]
; paranoid check, given A1 was active when A2 happened, preempt count
; must not be 0 because we would have incremented it.
; If this does happen we simply HALT as it means a BUG !!!
cmp r9, 0
bnz 2f
flag 1
2:
sub r9, r9, 1
st r9, [r10, THREAD_INFO_PREEMPT_COUNT]
149:
;return from level 2
INTERRUPT_EPILOGUE 2
debug_marker_l2:
rtie
not_level2_interrupt:
#endif
bbit0 r10, STATUS_A1_BIT, .Lpure_k_mode_ret
;return from level 1
INTERRUPT_EPILOGUE 1
debug_marker_l1:
rtie
.Lexcep_ret:
.Lpure_k_mode_ret:
;this case is for syscalls or Exceptions or pure kernel mode
EXCEPTION_EPILOGUE
debug_marker_syscall:
rtie
END(ret_from_exception)

527
arch/arc/kernel/entry.S
View file

@ -1,60 +1,13 @@
/*
* Low Level Interrupts/Traps/Exceptions(non-TLB) Handling for ARC
* Common Low Level Interrupts/Traps/Exceptions(non-TLB) Handling for ARC
* (included from entry-<isa>.S
*
* Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* vineetg: May 2011
* -Userspace unaligned access emulation
*
* vineetg: Feb 2011 (ptrace low level code fixes)
* -traced syscall return code (r0) was not saved into pt_regs for restoring
* into user reg-file when traded task rets to user space.
* -syscalls needing arch-wrappers (mainly for passing sp as pt_regs)
* were not invoking post-syscall trace hook (jumping directly into
* ret_from_system_call)
*
* vineetg: Nov 2010:
* -Vector table jumps (@8 bytes) converted into branches (@4 bytes)
* -To maintain the slot size of 8 bytes/vector, added nop, which is
* not executed at runtime.
*
* vineetg: Nov 2009 (Everything needed for TIF_RESTORE_SIGMASK)
* -do_signal()invoked upon TIF_RESTORE_SIGMASK as well
* -Wrappers for sys_{,rt_}sigsuspend() nolonger needed as they don't
* need ptregs anymore
*
* Vineetg: Oct 2009
* -In a rare scenario, Process gets a Priv-V exception and gets scheduled
* out. Since we don't do FAKE RTIE for Priv-V, CPU excpetion state remains
* active (AE bit enabled). This causes a double fault for a subseq valid
* exception. Thus FAKE RTIE needed in low level Priv-Violation handler.
* Instr Error could also cause similar scenario, so same there as well.
*
* Vineetg: March 2009 (Supporting 2 levels of Interrupts)
*
* Vineetg: Aug 28th 2008: Bug #94984
* -Zero Overhead Loop Context shd be cleared when entering IRQ/EXcp/Trap
* Normally CPU does this automatically, however when doing FAKE rtie,
* we need to explicitly do this. The problem in macros
* FAKE_RET_FROM_EXCPN and FAKE_RET_FROM_EXCPN_LOCK_IRQ was that this bit
* was being "CLEARED" rather then "SET". Since it is Loop INHIBIT Bit,
* setting it and not clearing it clears ZOL context
*
* Vineetg: May 16th, 2008
* - r25 now contains the Current Task when in kernel
*
* Vineetg: Dec 22, 2007
* Minor Surgery of Low Level ISR to make it SMP safe
* - MMU_SCRATCH0 Reg used for freeing up r9 in Level 1 ISR
* - _current_task is made an array of NR_CPUS
* - Access of _current_task wrapped inside a macro so that if hardware
* team agrees for a dedicated reg, no other code is touched
*
* Amit Bhor, Rahul Trivedi, Kanika Nema, Sameer Dhavale : Codito Tech 2004
*/
/*------------------------------------------------------------------
@ -67,206 +20,59 @@
* Global Pointer (gp) r26
* Frame Pointer (fp) r27
* Stack Pointer (sp) r28
* Interrupt link register (ilink1) r29
* Interrupt link register (ilink2) r30
* Branch link register (blink) r31
*------------------------------------------------------------------
*/
.cpu A7
;################### Special Sys Call Wrappers ##########################
;############################ Vector Table #################################
ENTRY(sys_clone_wrapper)
SAVE_CALLEE_SAVED_USER
bl @sys_clone
DISCARD_CALLEE_SAVED_USER
.macro VECTOR lbl
#if 1 /* Just in case, build breaks */
j \lbl
#else
b \lbl
nop
#endif
.endm
GET_CURR_THR_INFO_FLAGS r10
btst r10, TIF_SYSCALL_TRACE
bnz tracesys_exit
.section .vector, "ax",@progbits
.align 4
b ret_from_system_call
END(sys_clone_wrapper)
/* Each entry in the vector table must occupy 2 words. Since it is a jump
* across sections (.vector to .text) we are gauranteed that 'j somewhere'
* will use the 'j limm' form of the intrsuction as long as somewhere is in
* a section other than .vector.
*/
ENTRY(ret_from_fork)
; when the forked child comes here from the __switch_to function
; r0 has the last task pointer.
; put last task in scheduler queue
bl @schedule_tail
; ********* Critical System Events **********************
VECTOR res_service ; 0x0, Restart Vector (0x0)
VECTOR mem_service ; 0x8, Mem exception (0x1)
VECTOR instr_service ; 0x10, Instrn Error (0x2)
ld r9, [sp, PT_status32]
brne r9, 0, 1f
; ******************** Device ISRs **********************
#ifdef CONFIG_ARC_IRQ3_LV2
VECTOR handle_interrupt_level2
#else
VECTOR handle_interrupt_level1
#endif
VECTOR handle_interrupt_level1
#ifdef CONFIG_ARC_IRQ5_LV2
VECTOR handle_interrupt_level2
#else
VECTOR handle_interrupt_level1
#endif
#ifdef CONFIG_ARC_IRQ6_LV2
VECTOR handle_interrupt_level2
#else
VECTOR handle_interrupt_level1
#endif
.rept 25
VECTOR handle_interrupt_level1 ; Other devices
.endr
/* FOR ARC600: timer = 0x3, uart = 0x8, emac = 0x10 */
; ******************** Exceptions **********************
VECTOR EV_MachineCheck ; 0x100, Fatal Machine check (0x20)
VECTOR EV_TLBMissI ; 0x108, Intruction TLB miss (0x21)
VECTOR EV_TLBMissD ; 0x110, Data TLB miss (0x22)
VECTOR EV_TLBProtV ; 0x118, Protection Violation (0x23)
; or Misaligned Access
VECTOR EV_PrivilegeV ; 0x120, Privilege Violation (0x24)
VECTOR EV_Trap ; 0x128, Trap exception (0x25)
VECTOR EV_Extension ; 0x130, Extn Intruction Excp (0x26)
.rept 24
VECTOR reserved ; Reserved Exceptions
.endr
#include <linux/linkage.h> /* {EXTRY,EXIT} */
#include <asm/entry.h> /* SAVE_ALL_{INT1,INT2,SYS...} */
#include <asm/errno.h>
#include <asm/arcregs.h>
#include <asm/irqflags.h>
;##################### Scratch Mem for IRQ stack switching #############
ARCFP_DATA int1_saved_reg
.align 32
.type int1_saved_reg, @object
.size int1_saved_reg, 4
int1_saved_reg:
.zero 4
/* Each Interrupt level needs its own scratch */
#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
ARCFP_DATA int2_saved_reg
.type int2_saved_reg, @object
.size int2_saved_reg, 4
int2_saved_reg:
.zero 4
#endif
; ---------------------------------------------
.section .text, "ax",@progbits
res_service: ; processor restart
flag 0x1 ; not implemented
nop
nop
reserved: ; processor restart
rtie ; jump to processor initializations
;##################### Interrupt Handling ##############################
#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
; ---------------------------------------------
; Level 2 ISR: Can interrupt a Level 1 ISR
; ---------------------------------------------
ENTRY(handle_interrupt_level2)
; TODO-vineetg for SMP this wont work
; free up r9 as scratchpad
st r9, [@int2_saved_reg]
;Which mode (user/kernel) was the system in when intr occured
lr r9, [status32_l2]
SWITCH_TO_KERNEL_STK
SAVE_ALL_INT2
;------------------------------------------------------
; if L2 IRQ interrupted a L1 ISR, disable preemption
;------------------------------------------------------
ld r9, [sp, PT_status32] ; get statu32_l2 (saved in pt_regs)
bbit0 r9, STATUS_A1_BIT, 1f ; L1 not active when L2 IRQ, so normal
; A1 is set in status32_l2
; bump thread_info->preempt_count (Disable preemption)
GET_CURR_THR_INFO_FROM_SP r10
ld r9, [r10, THREAD_INFO_PREEMPT_COUNT]
add r9, r9, 1
st r9, [r10, THREAD_INFO_PREEMPT_COUNT]
jl.d [r14] ; kernel thread entry point
mov r0, r13 ; (see PF_KTHREAD block in copy_thread)
1:
;------------------------------------------------------
; setup params for Linux common ISR and invoke it
;------------------------------------------------------
lr r0, [icause2]
and r0, r0, 0x1f
; Return to user space
; 1. Any forked task (Reach here via BRne above)
; 2. First ever init task (Reach here via return from JL above)
; This is the historic "kernel_execve" use-case, to return to init
; user mode, in a round about way since that is always done from
; a kernel thread which is executed via JL above but always returns
; out whenever kernel_execve (now inline do_fork()) is involved
b ret_from_exception
END(ret_from_fork)
bl.d @arch_do_IRQ
mov r1, sp
mov r8,0x2
sr r8, [AUX_IRQ_LV12] ; clear bit in Sticky Status Reg
b ret_from_exception
END(handle_interrupt_level2)
#ifdef CONFIG_ARC_DW2_UNWIND
; Workaround for bug 94179 (STAR ):
; Despite -fasynchronous-unwind-tables, linker is not making dwarf2 unwinder
; section (.debug_frame) as loadable. So we force it here.
; This also fixes STAR 9000487933 where the prev-workaround (objcopy --setflag)
; would not work after a clean build due to kernel build system dependencies.
.section .debug_frame, "wa",@progbits
; Reset to .text as this file is included in entry-<isa>.S
.section .text, "ax",@progbits
#endif
; ---------------------------------------------
; Level 1 ISR
; ---------------------------------------------
ENTRY(handle_interrupt_level1)
/* free up r9 as scratchpad */
#ifdef CONFIG_SMP
sr r9, [ARC_REG_SCRATCH_DATA0]
#else
st r9, [@int1_saved_reg]
#endif
;Which mode (user/kernel) was the system in when intr occured
lr r9, [status32_l1]
SWITCH_TO_KERNEL_STK
SAVE_ALL_INT1
lr r0, [icause1]
and r0, r0, 0x1f
#ifdef CONFIG_TRACE_IRQFLAGS
; icause1 needs to be read early, before calling tracing, which
; can clobber scratch regs, hence use of stack to stash it
push r0
TRACE_ASM_IRQ_DISABLE
pop r0
#endif
bl.d @arch_do_IRQ
mov r1, sp
mov r8,0x1
sr r8, [AUX_IRQ_LV12] ; clear bit in Sticky Status Reg
b ret_from_exception
END(handle_interrupt_level1)
;################### Non TLB Exception Handling #############################
; ---------------------------------------------
@ -280,7 +86,7 @@ ENTRY(instr_service)
lr r0, [efa]
mov r1, sp
FAKE_RET_FROM_EXCPN r9
FAKE_RET_FROM_EXCPN
bl do_insterror_or_kprobe
b ret_from_exception
@ -297,7 +103,7 @@ ENTRY(mem_service)
lr r0, [efa]
mov r1, sp
FAKE_RET_FROM_EXCPN r9
FAKE_RET_FROM_EXCPN
bl do_memory_error
b ret_from_exception
@ -333,60 +139,6 @@ ENTRY(EV_MachineCheck)
END(EV_MachineCheck)
; ---------------------------------------------
; Protection Violation Exception Handler
; ---------------------------------------------
ENTRY(EV_TLBProtV)
EXCEPTION_PROLOGUE
;---------(3) Save some more regs-----------------
; vineetg: Mar 6th: Random Seg Fault issue #1
; ecr and efa were not saved in case an Intr sneaks in
; after fake rtie
lr r2, [ecr]
lr r0, [efa] ; Faulting Data address
; --------(4) Return from CPU Exception Mode ---------
; Fake a rtie, but rtie to next label
; That way, subsequently, do_page_fault ( ) executes in pure kernel
; mode with further Exceptions enabled
FAKE_RET_FROM_EXCPN r9
mov r1, sp
;------ (5) Type of Protection Violation? ----------
;
; ProtV Hardware Exception is triggered for Access Faults of 2 types
; -Access Violaton : 00_23_(00|01|02|03)_00
; x r w r+w
; -Unaligned Access : 00_23_04_00
;
bbit1 r2, ECR_C_BIT_PROTV_MISALIG_DATA, 4f
;========= (6a) Access Violation Processing ========
bl do_page_fault
b ret_from_exception
;========== (6b) Non aligned access ============
4:
SAVE_CALLEE_SAVED_USER
mov r2, sp ; callee_regs
bl do_misaligned_access
; TBD: optimize - do this only if a callee reg was involved
; either a dst of emulated LD/ST or src with address-writeback
RESTORE_CALLEE_SAVED_USER
b ret_from_exception
END(EV_TLBProtV)
; ---------------------------------------------
; Privilege Violation Exception Handler
; ---------------------------------------------
@ -397,7 +149,7 @@ ENTRY(EV_PrivilegeV)
lr r0, [efa]
mov r1, sp
FAKE_RET_FROM_EXCPN r9
FAKE_RET_FROM_EXCPN
bl do_privilege_fault
b ret_from_exception
@ -413,14 +165,17 @@ ENTRY(EV_Extension)
lr r0, [efa]
mov r1, sp
FAKE_RET_FROM_EXCPN r9
FAKE_RET_FROM_EXCPN
bl do_extension_fault
b ret_from_exception
END(EV_Extension)
;######################### System Call Tracing #########################
;################ Trap Handling (Syscall, Breakpoint) ##################
; ---------------------------------------------
; syscall Tracing
; ---------------------------------------------
tracesys:
; save EFA in case tracer wants the PC of traced task
; using ERET won't work since next-PC has already committed
@ -463,10 +218,9 @@ tracesys_exit:
b ret_from_exception ; NOT ret_from_system_call at is saves r0 which
; we'd done before calling post hook above
;################### Break Point TRAP ##########################
; ======= (5b) Trap is due to Break-Point =========
; ---------------------------------------------
; Breakpoint TRAP
; ---------------------------------------------
trap_with_param:
; stop_pc info by gdb needs this info
@ -475,7 +229,7 @@ trap_with_param:
; Now that we have read EFA, it is safe to do "fake" rtie
; and get out of CPU exception mode
FAKE_RET_FROM_EXCPN r11
FAKE_RET_FROM_EXCPN
; Save callee regs in case gdb wants to have a look
; SP will grow up by size of CALLEE Reg-File
@ -494,37 +248,33 @@ trap_with_param:
b ret_from_exception
;##################### Trap Handling ##############################
;
; EV_Trap caused by TRAP_S and TRAP0 instructions.
;------------------------------------------------------------------
; (1) System Calls
; :parameters in r0-r7.
; :r8 has the system call number
; (2) Break Points
;------------------------------------------------------------------
; ---------------------------------------------
; syscall TRAP
; ABI: (r0-r7) upto 8 args, (r8) syscall number
; ---------------------------------------------
ENTRY(EV_Trap)
EXCEPTION_PROLOGUE
;------- (4) What caused the Trap --------------
lr r12, [ecr]
bmsk.f 0, r12, 7
;============ TRAP 1 :breakpoints
; Check ECR for trap with arg (PROLOGUE ensures r9 has ECR)
bmsk.f 0, r9, 7
bnz trap_with_param
; ======= (5a) Trap is due to System Call ========
;============ TRAP (no param): syscall top level
; Before doing anything, return from CPU Exception Mode
FAKE_RET_FROM_EXCPN r11
; First return from Exception to pure K mode (Exception/IRQs renabled)
FAKE_RET_FROM_EXCPN
; If syscall tracing ongoing, invoke pre-pos-hooks
; If syscall tracing ongoing, invoke pre-post-hooks
GET_CURR_THR_INFO_FLAGS r10
btst r10, TIF_SYSCALL_TRACE
bnz tracesys ; this never comes back
;============ This is normal System Call case ==========
; Sys-call num shd not exceed the total system calls avail
;============ Normal syscall case
; syscall num shd not exceed the total system calls avail
cmp r8, NR_syscalls
mov.hi r0, -ENOSYS
bhi ret_from_system_call
@ -565,7 +315,7 @@ resume_user_mode_begin:
; Fast Path return to user mode if no pending work
GET_CURR_THR_INFO_FLAGS r9
and.f 0, r9, _TIF_WORK_MASK
bz restore_regs
bz .Lrestore_regs
; --- (Slow Path #1) task preemption ---
bbit0 r9, TIF_NEED_RESCHED, .Lchk_pend_signals
@ -624,11 +374,11 @@ resume_kernel_mode:
; Can't preempt if preemption disabled
GET_CURR_THR_INFO_FROM_SP r10
ld r8, [r10, THREAD_INFO_PREEMPT_COUNT]
brne r8, 0, restore_regs
brne r8, 0, .Lrestore_regs
; check if this task's NEED_RESCHED flag set
ld r9, [r10, THREAD_INFO_FLAGS]
bbit0 r9, TIF_NEED_RESCHED, restore_regs
bbit0 r9, TIF_NEED_RESCHED, .Lrestore_regs
; Invoke PREEMPTION
bl preempt_schedule_irq
@ -636,142 +386,7 @@ resume_kernel_mode:
; preempt_schedule_irq() always returns with IRQ disabled
#endif
; fall through
b .Lrestore_regs
;############# Return from Intr/Excp/Trap (ARC Specifics) ##############
;
; Restore the saved sys context (common exit-path for EXCPN/IRQ/Trap)
; IRQ shd definitely not happen between now and rtie
; All 2 entry points to here already disable interrupts
##### DONT ADD CODE HERE - .Lrestore_regs actually follows in entry-<isa>.S
restore_regs :
TRACE_ASM_IRQ_ENABLE
lr r10, [status32]
; Restore REG File. In case multiple Events outstanding,
; use the same priorty as rtie: EXCPN, L2 IRQ, L1 IRQ, None
; Note that we use realtime STATUS32 (not pt_regs->status32) to
; decide that.
; if Returning from Exception
bbit0 r10, STATUS_AE_BIT, not_exception
RESTORE_ALL_SYS
rtie
; Not Exception so maybe Interrupts (Level 1 or 2)
not_exception:
#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
; Level 2 interrupt return Path - from hardware standpoint
bbit0 r10, STATUS_A2_BIT, not_level2_interrupt
;------------------------------------------------------------------
; However the context returning might not have taken L2 intr itself
; e.g. Task'A' user-code -> L2 intr -> schedule -> 'B' user-code ret
; Special considerations needed for the context which took L2 intr
ld r9, [sp, PT_event] ; Ensure this is L2 intr context
brne r9, event_IRQ2, 149f
;------------------------------------------------------------------
; if L2 IRQ interrupted an L1 ISR, we'd disabled preemption earlier
; so that sched doesn't move to new task, causing L1 to be delayed
; undeterministically. Now that we've achieved that, let's reset
; things to what they were, before returning from L2 context
;----------------------------------------------------------------
ld r9, [sp, PT_status32] ; get statu32_l2 (saved in pt_regs)
bbit0 r9, STATUS_A1_BIT, 149f ; L1 not active when L2 IRQ, so normal
; decrement thread_info->preempt_count (re-enable preemption)
GET_CURR_THR_INFO_FROM_SP r10
ld r9, [r10, THREAD_INFO_PREEMPT_COUNT]
; paranoid check, given A1 was active when A2 happened, preempt count
; must not be 0 because we would have incremented it.
; If this does happen we simply HALT as it means a BUG !!!
cmp r9, 0
bnz 2f
flag 1
2:
sub r9, r9, 1
st r9, [r10, THREAD_INFO_PREEMPT_COUNT]
149:
;return from level 2
RESTORE_ALL_INT2
debug_marker_l2:
rtie
not_level2_interrupt:
#endif
bbit0 r10, STATUS_A1_BIT, not_level1_interrupt
;return from level 1
RESTORE_ALL_INT1
debug_marker_l1:
rtie
not_level1_interrupt:
;this case is for syscalls or Exceptions (with fake rtie)
RESTORE_ALL_SYS
debug_marker_syscall:
rtie
END(ret_from_exception)
ENTRY(ret_from_fork)
; when the forked child comes here from the __switch_to function
; r0 has the last task pointer.
; put last task in scheduler queue
bl @schedule_tail
ld r9, [sp, PT_status32]
brne r9, 0, 1f
jl.d [r14] ; kernel thread entry point
mov r0, r13 ; (see PF_KTHREAD block in copy_thread)
1:
; Return to user space
; 1. Any forked task (Reach here via BRne above)
; 2. First ever init task (Reach here via return from JL above)
; This is the historic "kernel_execve" use-case, to return to init
; user mode, in a round about way since that is always done from
; a kernel thread which is executed via JL above but always returns
; out whenever kernel_execve (now inline do_fork()) is involved
b ret_from_exception
END(ret_from_fork)
;################### Special Sys Call Wrappers ##########################
ENTRY(sys_clone_wrapper)
SAVE_CALLEE_SAVED_USER
bl @sys_clone
DISCARD_CALLEE_SAVED_USER
GET_CURR_THR_INFO_FLAGS r10
btst r10, TIF_SYSCALL_TRACE
bnz tracesys_exit
b ret_from_system_call
END(sys_clone_wrapper)
#ifdef CONFIG_ARC_DW2_UNWIND
; Workaround for bug 94179 (STAR ):
; Despite -fasynchronous-unwind-tables, linker is not making dwarf2 unwinder
; section (.debug_frame) as loadable. So we force it here.
; This also fixes STAR 9000487933 where the prev-workaround (objcopy --setflag)
; would not work after a clean build due to kernel build system dependencies.
.section .debug_frame, "wa",@progbits
#endif

4
arch/arc/kernel/head.S
View file

@ -49,8 +49,6 @@
1:
.endm
.cpu A7
.section .init.text, "ax",@progbits
.type stext, @function
.globl stext
@ -83,6 +81,7 @@ stext:
st.ab 0, [r5, 4]
1:
#ifdef CONFIG_ARC_UBOOT_SUPPORT
; Uboot - kernel ABI
; r0 = [0] No uboot interaction, [1] cmdline in r2, [2] DTB in r2
; r1 = magic number (board identity, unused as of now
@ -90,6 +89,7 @@ stext:
; These are handled later in setup_arch()
st r0, [@uboot_tag]
st r2, [@uboot_arg]
#endif
; setup "current" tsk and optionally cache it in dedicated r25
mov r9, @init_task

143
arch/arc/kernel/intc-arcv2.c Normal file
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@ -0,0 +1,143 @@
/*
* Copyright (C) 2014 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/irqdomain.h>
#include <linux/irqchip.h>
#include "../../drivers/irqchip/irqchip.h"
#include <asm/irq.h>
/*
* Early Hardware specific Interrupt setup
* -Called very early (start_kernel -> setup_arch -> setup_processor)
* -Platform Independent (must for any ARC Core)
* -Needed for each CPU (hence not foldable into init_IRQ)
*/
void arc_init_IRQ(void)
{
unsigned int tmp;
struct aux_irq_ctrl {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned int res3:18, save_idx_regs:1, res2:1,
save_u_to_u:1, save_lp_regs:1, save_blink:1,
res:4, save_nr_gpr_pairs:5;
#else
unsigned int save_nr_gpr_pairs:5, res:4,
save_blink:1, save_lp_regs:1, save_u_to_u:1,
res2:1, save_idx_regs:1, res3:18;
#endif
} ictrl;
*(unsigned int *)&ictrl = 0;
ictrl.save_nr_gpr_pairs = 6; /* r0 to r11 (r12 saved manually) */
ictrl.save_blink = 1;
ictrl.save_lp_regs = 1; /* LP_COUNT, LP_START, LP_END */
ictrl.save_u_to_u = 0; /* user ctxt saved on kernel stack */
ictrl.save_idx_regs = 1; /* JLI, LDI, EI */
WRITE_AUX(AUX_IRQ_CTRL, ictrl);
/* setup status32, don't enable intr yet as kernel doesn't want */
tmp = read_aux_reg(0xa);
tmp |= ISA_INIT_STATUS_BITS;
tmp &= ~STATUS_IE_MASK;
asm volatile("flag %0 \n"::"r"(tmp));
/*
* ARCv2 core intc provides multiple interrupt priorities (upto 16).
* Typical builds though have only two levels (0-high, 1-low)
* Linux by default uses lower prio 1 for most irqs, reserving 0 for
* NMI style interrupts in future (say perf)
*
* Read the intc BCR to confirm that Linux default priority is avail
* in h/w
*
* Note:
* IRQ_BCR[27..24] contains N-1 (for N priority levels) and prio level
* is 0 based.
*/
tmp = (read_aux_reg(ARC_REG_IRQ_BCR) >> 24 ) & 0xF;
if (ARCV2_IRQ_DEF_PRIO > tmp)
panic("Linux default irq prio incorrect\n");
}
static void arcv2_irq_mask(struct irq_data *data)
{
write_aux_reg(AUX_IRQ_SELECT, data->irq);
write_aux_reg(AUX_IRQ_ENABLE, 0);
}
static void arcv2_irq_unmask(struct irq_data *data)
{
write_aux_reg(AUX_IRQ_SELECT, data->irq);
write_aux_reg(AUX_IRQ_ENABLE, 1);
}
void arcv2_irq_enable(struct irq_data *data)
{
/* set default priority */
write_aux_reg(AUX_IRQ_SELECT, data->irq);
write_aux_reg(AUX_IRQ_PRIORITY, ARCV2_IRQ_DEF_PRIO);
/*
* hw auto enables (linux unmask) all by default
* So no need to do IRQ_ENABLE here
* XXX: However OSCI LAN need it
*/
write_aux_reg(AUX_IRQ_ENABLE, 1);
}
static struct irq_chip arcv2_irq_chip = {
.name = "ARCv2 core Intc",
.irq_mask = arcv2_irq_mask,
.irq_unmask = arcv2_irq_unmask,
.irq_enable = arcv2_irq_enable
};
static int arcv2_irq_map(struct irq_domain *d, unsigned int irq,
irq_hw_number_t hw)
{
if (irq == TIMER0_IRQ || irq == IPI_IRQ)
irq_set_chip_and_handler(irq, &arcv2_irq_chip, handle_percpu_irq);
else
irq_set_chip_and_handler(irq, &arcv2_irq_chip, handle_level_irq);
return 0;
}
static const struct irq_domain_ops arcv2_irq_ops = {
.xlate = irq_domain_xlate_onecell,
.map = arcv2_irq_map,
};
static struct irq_domain *root_domain;
static int __init
init_onchip_IRQ(struct device_node *intc, struct device_node *parent)
{
if (parent)
panic("DeviceTree incore intc not a root irq controller\n");
root_domain = irq_domain_add_legacy(intc, NR_CPU_IRQS, 0, 0,
&arcv2_irq_ops, NULL);
if (!root_domain)
panic("root irq domain not avail\n");
/* with this we don't need to export root_domain */
irq_set_default_host(root_domain);
return 0;
}
IRQCHIP_DECLARE(arc_intc, "snps,archs-intc", init_onchip_IRQ);

226
arch/arc/kernel/intc-compact.c Normal file
View file

@ -0,0 +1,226 @@
/*
* Copyright (C) 2011-12 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/irqdomain.h>
#include <linux/irqchip.h>
#include "../../drivers/irqchip/irqchip.h"
#include <asm/irq.h>
/*
* Early Hardware specific Interrupt setup
* -Platform independent, needed for each CPU (not foldable into init_IRQ)
* -Called very early (start_kernel -> setup_arch -> setup_processor)
*
* what it does ?
* -Optionally, setup the High priority Interrupts as Level 2 IRQs
*/
void arc_init_IRQ(void)
{
int level_mask = 0;
/* setup any high priority Interrupts (Level2 in ARCompact jargon) */
level_mask |= IS_ENABLED(CONFIG_ARC_IRQ3_LV2) << 3;
level_mask |= IS_ENABLED(CONFIG_ARC_IRQ5_LV2) << 5;
level_mask |= IS_ENABLED(CONFIG_ARC_IRQ6_LV2) << 6;
/*
* Write to register, even if no LV2 IRQs configured to reset it
* in case bootloader had mucked with it
*/
write_aux_reg(AUX_IRQ_LEV, level_mask);
if (level_mask)
pr_info("Level-2 interrupts bitset %x\n", level_mask);
}
/*
* ARC700 core includes a simple on-chip intc supporting
* -per IRQ enable/disable
* -2 levels of interrupts (high/low)
* -all interrupts being level triggered
*
* To reduce platform code, we assume all IRQs directly hooked-up into intc.
* Platforms with external intc, hence cascaded IRQs, are free to over-ride
* below, per IRQ.
*/
static void arc_irq_mask(struct irq_data *data)
{
unsigned int ienb;
ienb = read_aux_reg(AUX_IENABLE);
ienb &= ~(1 << data->irq);
write_aux_reg(AUX_IENABLE, ienb);
}
static void arc_irq_unmask(struct irq_data *data)
{
unsigned int ienb;
ienb = read_aux_reg(AUX_IENABLE);
ienb |= (1 << data->irq);
write_aux_reg(AUX_IENABLE, ienb);
}
static struct irq_chip onchip_intc = {
.name = "ARC In-core Intc",
.irq_mask = arc_irq_mask,
.irq_unmask = arc_irq_unmask,
};
static int arc_intc_domain_map(struct irq_domain *d, unsigned int irq,
irq_hw_number_t hw)
{
/*
* XXX: the IPI IRQ needs to be handled like TIMER too. However ARC core
* code doesn't own it (like TIMER0). ISS IDU / ezchip define it
* in platform header which can't be included here as it goes
* against multi-platform image philisophy
*/
if (irq == TIMER0_IRQ)
irq_set_chip_and_handler(irq, &onchip_intc, handle_percpu_irq);
else
irq_set_chip_and_handler(irq, &onchip_intc, handle_level_irq);
return 0;
}
static const struct irq_domain_ops arc_intc_domain_ops = {
.xlate = irq_domain_xlate_onecell,
.map = arc_intc_domain_map,
};
static struct irq_domain *root_domain;
static int __init
init_onchip_IRQ(struct device_node *intc, struct device_node *parent)
{
if (parent)
panic("DeviceTree incore intc not a root irq controller\n");
root_domain = irq_domain_add_legacy(intc, NR_CPU_IRQS, 0, 0,
&arc_intc_domain_ops, NULL);
if (!root_domain)
panic("root irq domain not avail\n");
/* with this we don't need to export root_domain */
irq_set_default_host(root_domain);
return 0;
}
IRQCHIP_DECLARE(arc_intc, "snps,arc700-intc", init_onchip_IRQ);
/*
* arch_local_irq_enable - Enable interrupts.
*
* 1. Explicitly called to re-enable interrupts
* 2. Implicitly called from spin_unlock_irq, write_unlock_irq etc
* which maybe in hard ISR itself
*
* Semantics of this function change depending on where it is called from:
*
* -If called from hard-ISR, it must not invert interrupt priorities
* e.g. suppose TIMER is high priority (Level 2) IRQ
* Time hard-ISR, timer_interrupt( ) calls spin_unlock_irq several times.
* Here local_irq_enable( ) shd not re-enable lower priority interrupts
* -If called from soft-ISR, it must re-enable all interrupts
* soft ISR are low prioity jobs which can be very slow, thus all IRQs
* must be enabled while they run.
* Now hardware context wise we may still be in L2 ISR (not done rtie)
* still we must re-enable both L1 and L2 IRQs
* Another twist is prev scenario with flow being
* L1 ISR ==> interrupted by L2 ISR ==> L2 soft ISR
* here we must not re-enable Ll as prev Ll Interrupt's h/w context will get
* over-written (this is deficiency in ARC700 Interrupt mechanism)
*/
#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS /* Complex version for 2 IRQ levels */
void arch_local_irq_enable(void)
{
unsigned long flags = arch_local_save_flags();
/* Allow both L1 and L2 at the onset */
flags |= (STATUS_E1_MASK | STATUS_E2_MASK);
/* Called from hard ISR (between irq_enter and irq_exit) */
if (in_irq()) {
/* If in L2 ISR, don't re-enable any further IRQs as this can
* cause IRQ priorities to get upside down. e.g. it could allow
* L1 be taken while in L2 hard ISR which is wrong not only in
* theory, it can also cause the dreaded L1-L2-L1 scenario
*/
if (flags & STATUS_A2_MASK)
flags &= ~(STATUS_E1_MASK | STATUS_E2_MASK);
/* Even if in L1 ISR, allowe Higher prio L2 IRQs */
else if (flags & STATUS_A1_MASK)
flags &= ~(STATUS_E1_MASK);
}
/* called from soft IRQ, ideally we want to re-enable all levels */
else if (in_softirq()) {
/* However if this is case of L1 interrupted by L2,
* re-enabling both may cause whaco L1-L2-L1 scenario
* because ARC700 allows level 1 to interrupt an active L2 ISR
* Thus we disable both
* However some code, executing in soft ISR wants some IRQs
* to be enabled so we re-enable L2 only
*
* How do we determine L1 intr by L2
* -A2 is set (means in L2 ISR)
* -E1 is set in this ISR's pt_regs->status32 which is
* saved copy of status32_l2 when l2 ISR happened
*/
struct pt_regs *pt = get_irq_regs();
if ((flags & STATUS_A2_MASK) && pt &&
(pt->status32 & STATUS_A1_MASK)) {
/*flags &= ~(STATUS_E1_MASK | STATUS_E2_MASK); */
flags &= ~(STATUS_E1_MASK);
}
}
arch_local_irq_restore(flags);
}
#else /* ! CONFIG_ARC_COMPACT_IRQ_LEVELS */
/*
* Simpler version for only 1 level of interrupt
* Here we only Worry about Level 1 Bits
*/
void arch_local_irq_enable(void)
{
unsigned long flags;
/*
* ARC IDE Drivers tries to re-enable interrupts from hard-isr
* context which is simply wrong
*/
if (in_irq()) {
WARN_ONCE(1, "IRQ enabled from hard-isr");
return;
}
flags = arch_local_save_flags();
flags |= (STATUS_E1_MASK | STATUS_E2_MASK);
arch_local_irq_restore(flags);
}
#endif
EXPORT_SYMBOL(arch_local_irq_enable);

210
arch/arc/kernel/irq.c
View file

@ -8,115 +8,9 @@
*/
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/irqdomain.h>
#include <linux/irqchip.h>
#include "../../drivers/irqchip/irqchip.h"
#include <asm/sections.h>
#include <asm/irq.h>
#include <asm/mach_desc.h>
/*
* Early Hardware specific Interrupt setup
* -Platform independent, needed for each CPU (not foldable into init_IRQ)
* -Called very early (start_kernel -> setup_arch -> setup_processor)
*
* what it does ?
* -Optionally, setup the High priority Interrupts as Level 2 IRQs
*/
void arc_init_IRQ(void)
{
int level_mask = 0;
/* setup any high priority Interrupts (Level2 in ARCompact jargon) */
level_mask |= IS_ENABLED(CONFIG_ARC_IRQ3_LV2) << 3;
level_mask |= IS_ENABLED(CONFIG_ARC_IRQ5_LV2) << 5;
level_mask |= IS_ENABLED(CONFIG_ARC_IRQ6_LV2) << 6;
/*
* Write to register, even if no LV2 IRQs configured to reset it
* in case bootloader had mucked with it
*/
write_aux_reg(AUX_IRQ_LEV, level_mask);
if (level_mask)
pr_info("Level-2 interrupts bitset %x\n", level_mask);
}
/*
* ARC700 core includes a simple on-chip intc supporting
* -per IRQ enable/disable
* -2 levels of interrupts (high/low)
* -all interrupts being level triggered
*
* To reduce platform code, we assume all IRQs directly hooked-up into intc.
* Platforms with external intc, hence cascaded IRQs, are free to over-ride
* below, per IRQ.
*/
static void arc_irq_mask(struct irq_data *data)
{
unsigned int ienb;
ienb = read_aux_reg(AUX_IENABLE);
ienb &= ~(1 << data->irq);
write_aux_reg(AUX_IENABLE, ienb);
}
static void arc_irq_unmask(struct irq_data *data)
{
unsigned int ienb;
ienb = read_aux_reg(AUX_IENABLE);
ienb |= (1 << data->irq);
write_aux_reg(AUX_IENABLE, ienb);
}
static struct irq_chip onchip_intc = {
.name = "ARC In-core Intc",
.irq_mask = arc_irq_mask,
.irq_unmask = arc_irq_unmask,
};
static int arc_intc_domain_map(struct irq_domain *d, unsigned int irq,
irq_hw_number_t hw)
{
if (irq == TIMER0_IRQ)
irq_set_chip_and_handler(irq, &onchip_intc, handle_percpu_irq);
else
irq_set_chip_and_handler(irq, &onchip_intc, handle_level_irq);
return 0;
}
static const struct irq_domain_ops arc_intc_domain_ops = {
.xlate = irq_domain_xlate_onecell,
.map = arc_intc_domain_map,
};
static struct irq_domain *root_domain;
static int __init
init_onchip_IRQ(struct device_node *intc, struct device_node *parent)
{
if (parent)
panic("DeviceTree incore intc not a root irq controller\n");
root_domain = irq_domain_add_legacy(intc, NR_CPU_IRQS, 0, 0,
&arc_intc_domain_ops, NULL);
if (!root_domain)
panic("root irq domain not avail\n");
/* with this we don't need to export root_domain */
irq_set_default_host(root_domain);
return 0;
}
IRQCHIP_DECLARE(arc_intc, "snps,arc700-intc", init_onchip_IRQ);
/*
* Late Interrupt system init called from start_kernel for Boot CPU only
*
@ -178,107 +72,3 @@ void arc_request_percpu_irq(int irq, int cpu,
enable_percpu_irq(irq, 0);
}
/*
* arch_local_irq_enable - Enable interrupts.
*
* 1. Explicitly called to re-enable interrupts
* 2. Implicitly called from spin_unlock_irq, write_unlock_irq etc
* which maybe in hard ISR itself
*
* Semantics of this function change depending on where it is called from:
*
* -If called from hard-ISR, it must not invert interrupt priorities
* e.g. suppose TIMER is high priority (Level 2) IRQ
* Time hard-ISR, timer_interrupt( ) calls spin_unlock_irq several times.
* Here local_irq_enable( ) shd not re-enable lower priority interrupts
* -If called from soft-ISR, it must re-enable all interrupts
* soft ISR are low prioity jobs which can be very slow, thus all IRQs
* must be enabled while they run.
* Now hardware context wise we may still be in L2 ISR (not done rtie)
* still we must re-enable both L1 and L2 IRQs
* Another twist is prev scenario with flow being
* L1 ISR ==> interrupted by L2 ISR ==> L2 soft ISR
* here we must not re-enable Ll as prev Ll Interrupt's h/w context will get
* over-written (this is deficiency in ARC700 Interrupt mechanism)
*/
#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS /* Complex version for 2 IRQ levels */
void arch_local_irq_enable(void)
{
unsigned long flags;
flags = arch_local_save_flags();
/* Allow both L1 and L2 at the onset */
flags |= (STATUS_E1_MASK | STATUS_E2_MASK);
/* Called from hard ISR (between irq_enter and irq_exit) */
if (in_irq()) {
/* If in L2 ISR, don't re-enable any further IRQs as this can
* cause IRQ priorities to get upside down. e.g. it could allow
* L1 be taken while in L2 hard ISR which is wrong not only in
* theory, it can also cause the dreaded L1-L2-L1 scenario
*/
if (flags & STATUS_A2_MASK)
flags &= ~(STATUS_E1_MASK | STATUS_E2_MASK);
/* Even if in L1 ISR, allowe Higher prio L2 IRQs */
else if (flags & STATUS_A1_MASK)
flags &= ~(STATUS_E1_MASK);
}
/* called from soft IRQ, ideally we want to re-enable all levels */
else if (in_softirq()) {
/* However if this is case of L1 interrupted by L2,
* re-enabling both may cause whaco L1-L2-L1 scenario
* because ARC700 allows level 1 to interrupt an active L2 ISR
* Thus we disable both
* However some code, executing in soft ISR wants some IRQs
* to be enabled so we re-enable L2 only
*
* How do we determine L1 intr by L2
* -A2 is set (means in L2 ISR)
* -E1 is set in this ISR's pt_regs->status32 which is
* saved copy of status32_l2 when l2 ISR happened
*/
struct pt_regs *pt = get_irq_regs();
if ((flags & STATUS_A2_MASK) && pt &&
(pt->status32 & STATUS_A1_MASK)) {
/*flags &= ~(STATUS_E1_MASK | STATUS_E2_MASK); */
flags &= ~(STATUS_E1_MASK);
}
}
arch_local_irq_restore(flags);
}
#else /* ! CONFIG_ARC_COMPACT_IRQ_LEVELS */
/*
* Simpler version for only 1 level of interrupt
* Here we only Worry about Level 1 Bits
*/
void arch_local_irq_enable(void)
{
unsigned long flags;
/*
* ARC IDE Drivers tries to re-enable interrupts from hard-isr
* context which is simply wrong
*/
if (in_irq()) {
WARN_ONCE(1, "IRQ enabled from hard-isr");
return;
}
flags = arch_local_save_flags();
flags |= (STATUS_E1_MASK | STATUS_E2_MASK);
arch_local_irq_restore(flags);
}
#endif
EXPORT_SYMBOL(arch_local_irq_enable);

341
arch/arc/kernel/mcip.c Normal file
View file

@ -0,0 +1,341 @@
/*
* ARC ARConnect (MultiCore IP) support (formerly known as MCIP)
*
* Copyright (C) 2013 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/smp.h>
#include <linux/irq.h>
#include <linux/spinlock.h>
#include <asm/mcip.h>
static char smp_cpuinfo_buf[128];
static int idu_detected;
static DEFINE_RAW_SPINLOCK(mcip_lock);
/*
* Any SMP specific init any CPU does when it comes up.
* Here we setup the CPU to enable Inter-Processor-Interrupts
* Called for each CPU
* -Master : init_IRQ()
* -Other(s) : start_kernel_secondary()
*/
void mcip_init_smp(unsigned int cpu)
{
smp_ipi_irq_setup(cpu, IPI_IRQ);
}
static void mcip_ipi_send(int cpu)
{
unsigned long flags;
int ipi_was_pending;
/*
* NOTE: We must spin here if the other cpu hasn't yet
* serviced a previous message. This can burn lots
* of time, but we MUST follows this protocol or
* ipi messages can be lost!!!
* Also, we must release the lock in this loop because
* the other side may get to this same loop and not
* be able to ack -- thus causing deadlock.
*/
do {
raw_spin_lock_irqsave(&mcip_lock, flags);
__mcip_cmd(CMD_INTRPT_READ_STATUS, cpu);
ipi_was_pending = read_aux_reg(ARC_REG_MCIP_READBACK);
if (ipi_was_pending == 0)
break; /* break out but keep lock */
raw_spin_unlock_irqrestore(&mcip_lock, flags);
} while (1);
__mcip_cmd(CMD_INTRPT_GENERATE_IRQ, cpu);
raw_spin_unlock_irqrestore(&mcip_lock, flags);
#ifdef CONFIG_ARC_IPI_DBG
if (ipi_was_pending)
pr_info("IPI ACK delayed from cpu %d\n", cpu);
#endif
}
static void mcip_ipi_clear(int irq)
{
unsigned int cpu, c;
unsigned long flags;
unsigned int __maybe_unused copy;
raw_spin_lock_irqsave(&mcip_lock, flags);
/* Who sent the IPI */
__mcip_cmd(CMD_INTRPT_CHECK_SOURCE, 0);
copy = cpu = read_aux_reg(ARC_REG_MCIP_READBACK); /* 1,2,4,8... */
/*
* In rare case, multiple concurrent IPIs sent to same target can
* possibly be coalesced by MCIP into 1 asserted IRQ, so @cpus can be
* "vectored" (multiple bits sets) as opposed to typical single bit
*/
do {
c = __ffs(cpu); /* 0,1,2,3 */
__mcip_cmd(CMD_INTRPT_GENERATE_ACK, c);
cpu &= ~(1U << c);
} while (cpu);
raw_spin_unlock_irqrestore(&mcip_lock, flags);
#ifdef CONFIG_ARC_IPI_DBG
if (c != __ffs(copy))
pr_info("IPIs from %x coalesced to %x\n",
copy, raw_smp_processor_id());
#endif
}
volatile int wake_flag;
static void mcip_wakeup_cpu(int cpu, unsigned long pc)
{
BUG_ON(cpu == 0);
wake_flag = cpu;
}
void arc_platform_smp_wait_to_boot(int cpu)
{
while (wake_flag != cpu)
;
wake_flag = 0;
__asm__ __volatile__("j @first_lines_of_secondary \n");
}
struct plat_smp_ops plat_smp_ops = {
.info = smp_cpuinfo_buf,
.cpu_kick = mcip_wakeup_cpu,
.ipi_send = mcip_ipi_send,
.ipi_clear = mcip_ipi_clear,
};
void mcip_init_early_smp(void)
{
#define IS_AVAIL1(var, str) ((var) ? str : "")
struct mcip_bcr {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned int pad3:8,
idu:1, llm:1, num_cores:6,
iocoh:1, grtc:1, dbg:1, pad2:1,
msg:1, sem:1, ipi:1, pad:1,
ver:8;
#else
unsigned int ver:8,
pad:1, ipi:1, sem:1, msg:1,
pad2:1, dbg:1, grtc:1, iocoh:1,
num_cores:6, llm:1, idu:1,
pad3:8;
#endif
} mp;
READ_BCR(ARC_REG_MCIP_BCR, mp);
sprintf(smp_cpuinfo_buf,
"Extn [SMP]\t: ARConnect (v%d): %d cores with %s%s%s%s\n",
mp.ver, mp.num_cores,
IS_AVAIL1(mp.ipi, "IPI "),
IS_AVAIL1(mp.idu, "IDU "),
IS_AVAIL1(mp.dbg, "DEBUG "),
IS_AVAIL1(mp.grtc, "GRTC"));
idu_detected = mp.idu;
if (mp.dbg) {
__mcip_cmd_data(CMD_DEBUG_SET_SELECT, 0, 0xf);
__mcip_cmd_data(CMD_DEBUG_SET_MASK, 0xf, 0xf);
}
if (IS_ENABLED(CONFIG_ARC_HAS_GRTC) && !mp.grtc)
panic("kernel trying to use non-existent GRTC\n");
}
/***************************************************************************
* ARCv2 Interrupt Distribution Unit (IDU)
*
* Connects external "COMMON" IRQs to core intc, providing:
* -dynamic routing (IRQ affinity)
* -load balancing (Round Robin interrupt distribution)
* -1:N distribution
*
* It physically resides in the MCIP hw block
*/
#include <linux/irqchip.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include "../../drivers/irqchip/irqchip.h"
/*
* Set the DEST for @cmn_irq to @cpu_mask (1 bit per core)
*/
static void idu_set_dest(unsigned int cmn_irq, unsigned int cpu_mask)
{
__mcip_cmd_data(CMD_IDU_SET_DEST, cmn_irq, cpu_mask);
}
static void idu_set_mode(unsigned int cmn_irq, unsigned int lvl,
unsigned int distr)
{
union {
unsigned int word;
struct {
unsigned int distr:2, pad:2, lvl:1, pad2:27;
};
} data;
data.distr = distr;
data.lvl = lvl;
__mcip_cmd_data(CMD_IDU_SET_MODE, cmn_irq, data.word);
}
static void idu_irq_mask(struct irq_data *data)
{
unsigned long flags;
raw_spin_lock_irqsave(&mcip_lock, flags);
__mcip_cmd_data(CMD_IDU_SET_MASK, data->hwirq, 1);
raw_spin_unlock_irqrestore(&mcip_lock, flags);
}
static void idu_irq_unmask(struct irq_data *data)
{
unsigned long flags;
raw_spin_lock_irqsave(&mcip_lock, flags);
__mcip_cmd_data(CMD_IDU_SET_MASK, data->hwirq, 0);
raw_spin_unlock_irqrestore(&mcip_lock, flags);
}
static int
idu_irq_set_affinity(struct irq_data *d, const struct cpumask *cpumask, bool f)
{
return IRQ_SET_MASK_OK;
}
static struct irq_chip idu_irq_chip = {
.name = "MCIP IDU Intc",
.irq_mask = idu_irq_mask,
.irq_unmask = idu_irq_unmask,
#ifdef CONFIG_SMP
.irq_set_affinity = idu_irq_set_affinity,
#endif
};
static int idu_first_irq;
static void idu_cascade_isr(unsigned int core_irq, struct irq_desc *desc)
{
struct irq_domain *domain = irq_desc_get_handler_data(desc);
unsigned int idu_irq;
idu_irq = core_irq - idu_first_irq;
generic_handle_irq(irq_find_mapping(domain, idu_irq));
}
static int idu_irq_map(struct irq_domain *d, unsigned int virq, irq_hw_number_t hwirq)
{
irq_set_chip_and_handler(virq, &idu_irq_chip, handle_level_irq);
irq_set_status_flags(virq, IRQ_MOVE_PCNTXT);
return 0;
}
static int idu_irq_xlate(struct irq_domain *d, struct device_node *n,
const u32 *intspec, unsigned int intsize,
irq_hw_number_t *out_hwirq, unsigned int *out_type)
{
irq_hw_number_t hwirq = *out_hwirq = intspec[0];
int distri = intspec[1];
unsigned long flags;
*out_type = IRQ_TYPE_NONE;
/* XXX: validate distribution scheme again online cpu mask */
if (distri == 0) {
/* 0 - Round Robin to all cpus, otherwise 1 bit per core */
raw_spin_lock_irqsave(&mcip_lock, flags);
idu_set_dest(hwirq, BIT(num_online_cpus()) - 1);
idu_set_mode(hwirq, IDU_M_TRIG_LEVEL, IDU_M_DISTRI_RR);
raw_spin_unlock_irqrestore(&mcip_lock, flags);
} else {
/*
* DEST based distribution for Level Triggered intr can only
* have 1 CPU, so generalize it to always contain 1 cpu
*/
int cpu = ffs(distri);
if (cpu != fls(distri))
pr_warn("IDU irq %lx distri mode set to cpu %x\n",
hwirq, cpu);
raw_spin_lock_irqsave(&mcip_lock, flags);
idu_set_dest(hwirq, cpu);
idu_set_mode(hwirq, IDU_M_TRIG_LEVEL, IDU_M_DISTRI_DEST);
raw_spin_unlock_irqrestore(&mcip_lock, flags);
}
return 0;
}
static const struct irq_domain_ops idu_irq_ops = {
.xlate = idu_irq_xlate,
.map = idu_irq_map,
};
/*
* [16, 23]: Statically assigned always private-per-core (Timers, WDT, IPI)
* [24, 23+C]: If C > 0 then "C" common IRQs
* [24+C, N]: Not statically assigned, private-per-core
*/
static int __init
idu_of_init(struct device_node *intc, struct device_node *parent)
{
struct irq_domain *domain;
/* Read IDU BCR to confirm nr_irqs */
int nr_irqs = of_irq_count(intc);
int i, irq;
if (!idu_detected)
panic("IDU not detected, but DeviceTree using it");
pr_info("MCIP: IDU referenced from Devicetree %d irqs\n", nr_irqs);
domain = irq_domain_add_linear(intc, nr_irqs, &idu_irq_ops, NULL);
/* Parent interrupts (core-intc) are already mapped */
for (i = 0; i < nr_irqs; i++) {
/*
* Return parent uplink IRQs (towards core intc) 24,25,.....
* this step has been done before already
* however we need it to get the parent virq and set IDU handler
* as first level isr
*/
irq = irq_of_parse_and_map(intc, i);
if (!i)
idu_first_irq = irq;
irq_set_handler_data(irq, domain);
irq_set_chained_handler(irq, idu_cascade_isr);
}
__mcip_cmd(CMD_IDU_ENABLE, 0);
return 0;
}
IRQCHIP_DECLARE(arcv2_idu_intc, "snps,archs-idu-intc", idu_of_init);

7
arch/arc/kernel/perf_event.c
View file

@ -266,10 +266,9 @@ static int arc_pmu_add(struct perf_event *event, int flags)
static int arc_pmu_device_probe(struct platform_device *pdev)
{
struct arc_pmu *arc_pmu;
struct arc_reg_pct_build pct_bcr;
struct arc_reg_cc_build cc_bcr;
int i, j, ret;
int i, j;
union cc_name {
struct {
@ -336,9 +335,7 @@ static int arc_pmu_device_probe(struct platform_device *pdev)
/* ARC 700 PMU does not support sampling events */
arc_pmu->pmu.capabilities |= PERF_PMU_CAP_NO_INTERRUPT;
ret = perf_pmu_register(&arc_pmu->pmu, pdev->name, PERF_TYPE_RAW);
return ret;
return perf_pmu_register(&arc_pmu->pmu, pdev->name, PERF_TYPE_RAW);
}
#ifdef CONFIG_OF

14
arch/arc/kernel/process.c
View file

@ -44,7 +44,11 @@ SYSCALL_DEFINE0(arc_gettls)
void arch_cpu_idle(void)
{
/* sleep, but enable all interrupts before committing */
__asm__("sleep 0x3");
if (is_isa_arcompact()) {
__asm__("sleep 0x3");
} else {
__asm__("sleep 0x10");
}
}
asmlinkage void ret_from_fork(void);
@ -166,8 +170,7 @@ void start_thread(struct pt_regs * regs, unsigned long pc, unsigned long usp)
* [L] ZOL loop inhibited to begin with - cleared by a LP insn
* Interrupts enabled
*/
regs->status32 = STATUS_U_MASK | STATUS_L_MASK |
STATUS_E1_MASK | STATUS_E2_MASK;
regs->status32 = STATUS_U_MASK | STATUS_L_MASK | ISA_INIT_STATUS_BITS;
/* bogus seed values for debugging */
regs->lp_start = 0x10;
@ -197,8 +200,11 @@ int elf_check_arch(const struct elf32_hdr *x)
{
unsigned int eflags;
if (x->e_machine != EM_ARCOMPACT)
if (x->e_machine != EM_ARC_INUSE) {
pr_err("ELF not built for %s ISA\n",
is_isa_arcompact() ? "ARCompact":"ARCv2");
return 0;
}
eflags = x->e_flags;
if ((eflags & EF_ARC_OSABI_MSK) < EF_ARC_OSABI_CURRENT) {

92
arch/arc/kernel/ptrace.c
View file

@ -47,10 +47,47 @@ static int genregs_get(struct task_struct *target,
offsetof(struct user_regs_struct, LOC) + 4);
REG_O_ZERO(pad);
REG_O_CHUNK(scratch, callee, ptregs);
REG_O_ONE(scratch.bta, &ptregs->bta);
REG_O_ONE(scratch.lp_start, &ptregs->lp_start);
REG_O_ONE(scratch.lp_end, &ptregs->lp_end);
REG_O_ONE(scratch.lp_count, &ptregs->lp_count);
REG_O_ONE(scratch.status32, &ptregs->status32);
REG_O_ONE(scratch.ret, &ptregs->ret);
REG_O_ONE(scratch.blink, &ptregs->blink);
REG_O_ONE(scratch.fp, &ptregs->fp);
REG_O_ONE(scratch.gp, &ptregs->r26);
REG_O_ONE(scratch.r12, &ptregs->r12);
REG_O_ONE(scratch.r11, &ptregs->r11);
REG_O_ONE(scratch.r10, &ptregs->r10);
REG_O_ONE(scratch.r9, &ptregs->r9);
REG_O_ONE(scratch.r8, &ptregs->r8);
REG_O_ONE(scratch.r7, &ptregs->r7);
REG_O_ONE(scratch.r6, &ptregs->r6);
REG_O_ONE(scratch.r5, &ptregs->r5);
REG_O_ONE(scratch.r4, &ptregs->r4);
REG_O_ONE(scratch.r3, &ptregs->r3);
REG_O_ONE(scratch.r2, &ptregs->r2);
REG_O_ONE(scratch.r1, &ptregs->r1);
REG_O_ONE(scratch.r0, &ptregs->r0);
REG_O_ONE(scratch.sp, &ptregs->sp);
REG_O_ZERO(pad2);
REG_O_CHUNK(callee, efa, cregs);
REG_O_CHUNK(efa, stop_pc, &target->thread.fault_address);
REG_O_ONE(callee.r25, &cregs->r25);
REG_O_ONE(callee.r24, &cregs->r24);
REG_O_ONE(callee.r23, &cregs->r23);
REG_O_ONE(callee.r22, &cregs->r22);
REG_O_ONE(callee.r21, &cregs->r21);
REG_O_ONE(callee.r20, &cregs->r20);
REG_O_ONE(callee.r19, &cregs->r19);
REG_O_ONE(callee.r18, &cregs->r18);
REG_O_ONE(callee.r17, &cregs->r17);
REG_O_ONE(callee.r16, &cregs->r16);
REG_O_ONE(callee.r15, &cregs->r15);
REG_O_ONE(callee.r14, &cregs->r14);
REG_O_ONE(callee.r13, &cregs->r13);
REG_O_ONE(efa, &target->thread.fault_address);
if (!ret) {
if (in_brkpt_trap(ptregs)) {
@ -97,12 +134,51 @@ static int genregs_set(struct task_struct *target,
offsetof(struct user_regs_struct, LOC) + 4);
REG_IGNORE_ONE(pad);
/* TBD: disallow updates to STATUS32 etc*/
REG_IN_CHUNK(scratch, pad2, ptregs); /* pt_regs[bta..sp] */
REG_IN_ONE(scratch.bta, &ptregs->bta);
REG_IN_ONE(scratch.lp_start, &ptregs->lp_start);
REG_IN_ONE(scratch.lp_end, &ptregs->lp_end);
REG_IN_ONE(scratch.lp_count, &ptregs->lp_count);
REG_IGNORE_ONE(scratch.status32);
REG_IN_ONE(scratch.ret, &ptregs->ret);
REG_IN_ONE(scratch.blink, &ptregs->blink);
REG_IN_ONE(scratch.fp, &ptregs->fp);
REG_IN_ONE(scratch.gp, &ptregs->r26);
REG_IN_ONE(scratch.r12, &ptregs->r12);
REG_IN_ONE(scratch.r11, &ptregs->r11);
REG_IN_ONE(scratch.r10, &ptregs->r10);
REG_IN_ONE(scratch.r9, &ptregs->r9);
REG_IN_ONE(scratch.r8, &ptregs->r8);
REG_IN_ONE(scratch.r7, &ptregs->r7);
REG_IN_ONE(scratch.r6, &ptregs->r6);
REG_IN_ONE(scratch.r5, &ptregs->r5);
REG_IN_ONE(scratch.r4, &ptregs->r4);
REG_IN_ONE(scratch.r3, &ptregs->r3);
REG_IN_ONE(scratch.r2, &ptregs->r2);
REG_IN_ONE(scratch.r1, &ptregs->r1);
REG_IN_ONE(scratch.r0, &ptregs->r0);
REG_IN_ONE(scratch.sp, &ptregs->sp);
REG_IGNORE_ONE(pad2);
REG_IN_CHUNK(callee, efa, cregs); /* callee_regs[r25..r13] */
REG_IN_ONE(callee.r25, &cregs->r25);
REG_IN_ONE(callee.r24, &cregs->r24);
REG_IN_ONE(callee.r23, &cregs->r23);
REG_IN_ONE(callee.r22, &cregs->r22);
REG_IN_ONE(callee.r21, &cregs->r21);
REG_IN_ONE(callee.r20, &cregs->r20);
REG_IN_ONE(callee.r19, &cregs->r19);
REG_IN_ONE(callee.r18, &cregs->r18);
REG_IN_ONE(callee.r17, &cregs->r17);
REG_IN_ONE(callee.r16, &cregs->r16);
REG_IN_ONE(callee.r15, &cregs->r15);
REG_IN_ONE(callee.r14, &cregs->r14);
REG_IN_ONE(callee.r13, &cregs->r13);
REG_IGNORE_ONE(efa); /* efa update invalid */
REG_IGNORE_ONE(stop_pc); /* PC updated via @ret */
REG_IGNORE_ONE(stop_pc); /* PC updated via @ret */
return ret;
}
@ -124,7 +200,7 @@ static const struct user_regset arc_regsets[] = {
static const struct user_regset_view user_arc_view = {
.name = UTS_MACHINE,
.e_machine = EM_ARCOMPACT,
.e_machine = EM_ARC_INUSE,
.regsets = arc_regsets,
.n = ARRAY_SIZE(arc_regsets)
};

63
arch/arc/kernel/setup.c
View file

@ -30,6 +30,8 @@
#define FIX_PTR(x) __asm__ __volatile__(";" : "+r"(x))
unsigned int intr_to_DE_cnt;
/* Part of U-boot ABI: see head.S */
int __initdata uboot_tag;
char __initdata *uboot_arg;
@ -54,7 +56,7 @@ static void read_arc_build_cfg_regs(void)
cpu->vec_base = read_aux_reg(AUX_INTR_VEC_BASE);
READ_BCR(ARC_REG_D_UNCACH_BCR, uncached_space);
cpu->uncached_base = uncached_space.start << 24;
BUG_ON((uncached_space.start << 24) != ARC_UNCACHED_ADDR_SPACE);
READ_BCR(ARC_REG_MUL_BCR, cpu->extn_mpy);
@ -96,7 +98,7 @@ static void read_arc_build_cfg_regs(void)
read_decode_mmu_bcr();
read_decode_cache_bcr();
{
if (is_isa_arcompact()) {
struct bcr_fp_arcompact sp, dp;
struct bcr_bpu_arcompact bpu;
@ -112,6 +114,19 @@ static void read_arc_build_cfg_regs(void)
cpu->bpu.num_cache = 256 << (bpu.ent - 1);
cpu->bpu.num_pred = 256 << (bpu.ent - 1);
}
} else {
struct bcr_fp_arcv2 spdp;
struct bcr_bpu_arcv2 bpu;
READ_BCR(ARC_REG_FP_V2_BCR, spdp);
cpu->extn.fpu_sp = spdp.sp ? 1 : 0;
cpu->extn.fpu_dp = spdp.dp ? 1 : 0;
READ_BCR(ARC_REG_BPU_BCR, bpu);
cpu->bpu.ver = bpu.ver;
cpu->bpu.full = bpu.ft;
cpu->bpu.num_cache = 256 << bpu.bce;
cpu->bpu.num_pred = 2048 << bpu.pte;
}
READ_BCR(ARC_REG_AP_BCR, bcr);
@ -131,6 +146,7 @@ static const struct cpuinfo_data arc_cpu_tbl[] = {
{ {0x30, "ARC 700" }, 0x33},
{ {0x34, "ARC 700 R4.10"}, 0x34},
{ {0x35, "ARC 700 R4.11"}, 0x35},
{ {0x50, "ARC HS38" }, 0x51},
{ {0x00, NULL } }
};
@ -149,13 +165,17 @@ static char *arc_cpu_mumbojumbo(int cpu_id, char *buf, int len)
FIX_PTR(cpu);
{
if (is_isa_arcompact()) {
isa_nm = "ARCompact";
be = IS_ENABLED(CONFIG_CPU_BIG_ENDIAN);
atomic = cpu->isa.atomic1;
if (!cpu->isa.ver) /* ISA BCR absent, use Kconfig info */
atomic = IS_ENABLED(CONFIG_ARC_HAS_LLSC);
} else {
isa_nm = "ARCv2";
be = cpu->isa.be;
atomic = cpu->isa.atomic;
}
n += scnprintf(buf + n, len - n,
@ -183,16 +203,34 @@ static char *arc_cpu_mumbojumbo(int cpu_id, char *buf, int len)
n += scnprintf(buf + n, len - n, "Timers\t\t: %s%s%s%s\nISA Extn\t: ",
IS_AVAIL1(cpu->timers.t0, "Timer0 "),
IS_AVAIL1(cpu->timers.t1, "Timer1 "),
IS_AVAIL2(cpu->timers.rtsc, "64-bit RTSC ", CONFIG_ARC_HAS_RTSC));
IS_AVAIL2(cpu->timers.rtc, "64-bit RTC ",
CONFIG_ARC_HAS_RTC));
n += i = scnprintf(buf + n, len - n, "%s%s",
IS_AVAIL2(atomic, "atomic ", CONFIG_ARC_HAS_LLSC));
n += i = scnprintf(buf + n, len - n, "%s%s%s%s%s",
IS_AVAIL2(atomic, "atomic ", CONFIG_ARC_HAS_LLSC),
IS_AVAIL2(cpu->isa.ldd, "ll64 ", CONFIG_ARC_HAS_LL64),
IS_AVAIL1(cpu->isa.unalign, "unalign (not used)"));
if (i)
n += scnprintf(buf + n, len - n, "\n\t\t: ");
if (cpu->extn_mpy.ver) {
if (cpu->extn_mpy.ver <= 0x2) { /* ARCompact */
n += scnprintf(buf + n, len - n, "mpy ");
} else {
int opt = 2; /* stock MPY/MPYH */
if (cpu->extn_mpy.dsp) /* OPT 7-9 */
opt = cpu->extn_mpy.dsp + 6;
n += scnprintf(buf + n, len - n, "mpy[opt %d] ", opt);
}
n += scnprintf(buf + n, len - n, "%s",
IS_USED(CONFIG_ARC_HAS_HW_MPY));
}
n += scnprintf(buf + n, len - n, "%s%s%s%s%s%s%s%s\n",
IS_AVAIL1(cpu->extn_mpy.ver, "mpy "),
IS_AVAIL1(cpu->isa.div_rem, "div_rem "),
IS_AVAIL1(cpu->extn.norm, "norm "),
IS_AVAIL1(cpu->extn.barrel, "barrel-shift "),
IS_AVAIL1(cpu->extn.swap, "swap "),
@ -219,7 +257,7 @@ static char *arc_extn_mumbojumbo(int cpu_id, char *buf, int len)
n += scnprintf(buf + n, len - n,
"Vector Table\t: %#x\nUncached Base\t: %#x\n",
cpu->vec_base, cpu->uncached_base);
cpu->vec_base, ARC_UNCACHED_ADDR_SPACE);
if (cpu->extn.fpu_sp || cpu->extn.fpu_dp)
n += scnprintf(buf + n, len - n, "FPU\t\t: %s%s\n",
@ -254,8 +292,8 @@ static void arc_chk_core_config(void)
if (!cpu->timers.t1)
panic("Timer1 is not present!\n");
if (IS_ENABLED(CONFIG_ARC_HAS_RTSC) && !cpu->timers.rtsc)
panic("RTSC is not present\n");
if (IS_ENABLED(CONFIG_ARC_HAS_RTC) && !cpu->timers.rtc)
panic("RTC is not present\n");
#ifdef CONFIG_ARC_HAS_DCCM
/*
@ -323,13 +361,16 @@ static inline int is_kernel(unsigned long addr)
void __init setup_arch(char **cmdline_p)
{
#ifdef CONFIG_ARC_UBOOT_SUPPORT
/* make sure that uboot passed pointer to cmdline/dtb is valid */
if (uboot_tag && is_kernel((unsigned long)uboot_arg))
panic("Invalid uboot arg\n");
/* See if u-boot passed an external Device Tree blob */
machine_desc = setup_machine_fdt(uboot_arg); /* uboot_tag == 2 */
if (!machine_desc) {
if (!machine_desc)
#endif
{
/* No, so try the embedded one */
machine_desc = setup_machine_fdt(__dtb_start);
if (!machine_desc)

62
arch/arc/kernel/signal.c
View file

@ -67,7 +67,33 @@ stash_usr_regs(struct rt_sigframe __user *sf, struct pt_regs *regs,
sigset_t *set)
{
int err;
err = __copy_to_user(&(sf->uc.uc_mcontext.regs.scratch), regs,
struct user_regs_struct uregs;
uregs.scratch.bta = regs->bta;
uregs.scratch.lp_start = regs->lp_start;
uregs.scratch.lp_end = regs->lp_end;
uregs.scratch.lp_count = regs->lp_count;
uregs.scratch.status32 = regs->status32;
uregs.scratch.ret = regs->ret;
uregs.scratch.blink = regs->blink;
uregs.scratch.fp = regs->fp;
uregs.scratch.gp = regs->r26;
uregs.scratch.r12 = regs->r12;
uregs.scratch.r11 = regs->r11;
uregs.scratch.r10 = regs->r10;
uregs.scratch.r9 = regs->r9;
uregs.scratch.r8 = regs->r8;
uregs.scratch.r7 = regs->r7;
uregs.scratch.r6 = regs->r6;
uregs.scratch.r5 = regs->r5;
uregs.scratch.r4 = regs->r4;
uregs.scratch.r3 = regs->r3;
uregs.scratch.r2 = regs->r2;
uregs.scratch.r1 = regs->r1;
uregs.scratch.r0 = regs->r0;
uregs.scratch.sp = regs->sp;
err = __copy_to_user(&(sf->uc.uc_mcontext.regs.scratch), &uregs.scratch,
sizeof(sf->uc.uc_mcontext.regs.scratch));
err |= __copy_to_user(&sf->uc.uc_sigmask, set, sizeof(sigset_t));
@ -78,14 +104,40 @@ static int restore_usr_regs(struct pt_regs *regs, struct rt_sigframe __user *sf)
{
sigset_t set;
int err;
struct user_regs_struct uregs;
err = __copy_from_user(&set, &sf->uc.uc_sigmask, sizeof(set));
if (!err)
set_current_blocked(&set);
err |= __copy_from_user(regs, &(sf->uc.uc_mcontext.regs.scratch),
err |= __copy_from_user(&uregs.scratch,
&(sf->uc.uc_mcontext.regs.scratch),
sizeof(sf->uc.uc_mcontext.regs.scratch));
regs->bta = uregs.scratch.bta;
regs->lp_start = uregs.scratch.lp_start;
regs->lp_end = uregs.scratch.lp_end;
regs->lp_count = uregs.scratch.lp_count;
regs->status32 = uregs.scratch.status32;
regs->ret = uregs.scratch.ret;
regs->blink = uregs.scratch.blink;
regs->fp = uregs.scratch.fp;
regs->r26 = uregs.scratch.gp;
regs->r12 = uregs.scratch.r12;
regs->r11 = uregs.scratch.r11;
regs->r10 = uregs.scratch.r10;
regs->r9 = uregs.scratch.r9;
regs->r8 = uregs.scratch.r8;
regs->r7 = uregs.scratch.r7;
regs->r6 = uregs.scratch.r6;
regs->r5 = uregs.scratch.r5;
regs->r4 = uregs.scratch.r4;
regs->r3 = uregs.scratch.r3;
regs->r2 = uregs.scratch.r2;
regs->r1 = uregs.scratch.r1;
regs->r0 = uregs.scratch.r0;
regs->sp = uregs.scratch.sp;
return err;
}
@ -284,7 +336,7 @@ static void arc_restart_syscall(struct k_sigaction *ka, struct pt_regs *regs)
* their orig user space value when we ret from kernel
*/
regs->r0 = regs->orig_r0;
regs->ret -= 4;
regs->ret -= is_isa_arcv2() ? 2 : 4;
break;
}
}
@ -325,10 +377,10 @@ void do_signal(struct pt_regs *regs)
if (regs->r0 == -ERESTARTNOHAND ||
regs->r0 == -ERESTARTSYS || regs->r0 == -ERESTARTNOINTR) {
regs->r0 = regs->orig_r0;
regs->ret -= 4;
regs->ret -= is_isa_arcv2() ? 2 : 4;
} else if (regs->r0 == -ERESTART_RESTARTBLOCK) {
regs->r8 = __NR_restart_syscall;
regs->ret -= 4;
regs->ret -= is_isa_arcv2() ? 2 : 4;
}
syscall_wont_restart(regs); /* No more restarts */
}

24
arch/arc/kernel/smp.c
View file

@ -31,7 +31,7 @@ arch_spinlock_t smp_atomic_ops_lock = __ARCH_SPIN_LOCK_UNLOCKED;
arch_spinlock_t smp_bitops_lock = __ARCH_SPIN_LOCK_UNLOCKED;
#endif
struct plat_smp_ops plat_smp_ops;
struct plat_smp_ops __weak plat_smp_ops;
/* XXX: per cpu ? Only needed once in early seconday boot */
struct task_struct *secondary_idle_tsk;
@ -182,7 +182,7 @@ int __cpu_up(unsigned int cpu, struct task_struct *idle)
/*
* not supported here
*/
int __init setup_profiling_timer(unsigned int multiplier)
int setup_profiling_timer(unsigned int multiplier)
{
return -EINVAL;
}
@ -278,8 +278,10 @@ static void ipi_cpu_stop(void)
machine_halt();
}
static inline void __do_IPI(unsigned long msg)
static inline int __do_IPI(unsigned long msg)
{
int rc = 0;
switch (msg) {
case IPI_RESCHEDULE:
scheduler_ipi();
@ -294,8 +296,10 @@ static inline void __do_IPI(unsigned long msg)
break;
default:
pr_warn("IPI with unexpected msg %ld\n", msg);
rc = 1;
}
return rc;
}
/*
@ -305,6 +309,7 @@ static inline void __do_IPI(unsigned long msg)
irqreturn_t do_IPI(int irq, void *dev_id)
{
unsigned long pending;
unsigned long __maybe_unused copy;
pr_debug("IPI [%ld] received on cpu %d\n",
*this_cpu_ptr(&ipi_data), smp_processor_id());
@ -316,11 +321,18 @@ irqreturn_t do_IPI(int irq, void *dev_id)
* "dequeue" the msg corresponding to this IPI (and possibly other
* piggybacked msg from elided IPIs: see ipi_send_msg_one() above)
*/
pending = xchg(this_cpu_ptr(&ipi_data), 0);
copy = pending = xchg(this_cpu_ptr(&ipi_data), 0);
do {
unsigned long msg = __ffs(pending);
__do_IPI(msg);
int rc;
rc = __do_IPI(msg);
#ifdef CONFIG_ARC_IPI_DBG
/* IPI received but no valid @msg */
if (rc)
pr_info("IPI with bogus msg %ld in %ld\n", msg, copy);
#endif
pending &= ~(1U << msg);
} while (pending);

18
arch/arc/kernel/stacktrace.c
View file

@ -122,19 +122,17 @@ arc_unwind_core(struct task_struct *tsk, struct pt_regs *regs,
while (1) {
address = UNW_PC(&frame_info);
if (address && __kernel_text_address(address)) {
if (consumer_fn(address, arg) == -1)
break;
}
if (!address || !__kernel_text_address(address))
break;
if (consumer_fn(address, arg) == -1)
break;
ret = arc_unwind(&frame_info);
if (ret == 0) {
frame_info.regs.r63 = frame_info.regs.r31;
continue;
} else {
if (ret)
break;
}
frame_info.regs.r63 = frame_info.regs.r31;
}
return address; /* return the last address it saw */

94
arch/arc/kernel/time.c
View file

@ -26,6 +26,7 @@
* while TIMER1 for free running (clocksource)
*
* Newer ARC700 cores have 64bit clk fetching RTSC insn, preferred over TIMER1
* which however is currently broken
*/
#include <linux/spinlock.h>
@ -44,6 +45,8 @@
#include <asm/clk.h>
#include <asm/mach_desc.h>
#include <asm/mcip.h>
/* Timer related Aux registers */
#define ARC_REG_TIMER0_LIMIT 0x23 /* timer 0 limit */
#define ARC_REG_TIMER0_CTRL 0x22 /* timer 0 control */
@ -59,14 +62,10 @@
/********** Clock Source Device *********/
#ifdef CONFIG_ARC_HAS_RTSC
#ifdef CONFIG_ARC_HAS_GRTC
int arc_counter_setup(void)
static int arc_counter_setup(void)
{
/*
* For SMP this needs to be 0. However Kconfig glue doesn't
* enable this option for SMP configs
*/
return 1;
}
@ -74,6 +73,55 @@ static cycle_t arc_counter_read(struct clocksource *cs)
{
unsigned long flags;
union {
#ifdef CONFIG_CPU_BIG_ENDIAN
struct { u32 h, l; };
#else
struct { u32 l, h; };
#endif
cycle_t full;
} stamp;
local_irq_save(flags);
__mcip_cmd(CMD_GRTC_READ_LO, 0);
stamp.l = read_aux_reg(ARC_REG_MCIP_READBACK);
__mcip_cmd(CMD_GRTC_READ_HI, 0);
stamp.h = read_aux_reg(ARC_REG_MCIP_READBACK);
local_irq_restore(flags);
return stamp.full;
}
static struct clocksource arc_counter = {
.name = "ARConnect GRTC",
.rating = 400,
.read = arc_counter_read,
.mask = CLOCKSOURCE_MASK(64),
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
#else
#ifdef CONFIG_ARC_HAS_RTC
#define AUX_RTC_CTRL 0x103
#define AUX_RTC_LOW 0x104
#define AUX_RTC_HIGH 0x105
int arc_counter_setup(void)
{
write_aux_reg(AUX_RTC_CTRL, 1);
/* Not usable in SMP */
return !IS_ENABLED(CONFIG_SMP);
}
static cycle_t arc_counter_read(struct clocksource *cs)
{
unsigned long status;
union {
#ifdef CONFIG_CPU_BIG_ENDIAN
struct { u32 high, low; };
#else
@ -82,37 +130,27 @@ static cycle_t arc_counter_read(struct clocksource *cs)
cycle_t full;
} stamp;
flags = arch_local_irq_save();
__asm__ __volatile(
" .extCoreRegister tsch, 58, r, cannot_shortcut \n"
" rtsc %0, 0 \n"
" mov %1, 0 \n"
: "=r" (stamp.low), "=r" (stamp.high));
arch_local_irq_restore(flags);
"1: \n"
" lr %0, [AUX_RTC_LOW] \n"
" lr %1, [AUX_RTC_HIGH] \n"
" lr %2, [AUX_RTC_CTRL] \n"
" bbit0.nt %2, 31, 1b \n"
: "=r" (stamp.low), "=r" (stamp.high), "=r" (status));
return stamp.full;
}
static struct clocksource arc_counter = {
.name = "ARC RTSC",
.rating = 300,
.name = "ARCv2 RTC",
.rating = 350,
.read = arc_counter_read,
.mask = CLOCKSOURCE_MASK(32),
.mask = CLOCKSOURCE_MASK(64),
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
#else /* !CONFIG_ARC_HAS_RTSC */
static bool is_usable_as_clocksource(void)
{
#ifdef CONFIG_SMP
return 0;
#else
return 1;
#endif
}
#else /* !CONFIG_ARC_HAS_RTC */
/*
* set 32bit TIMER1 to keep counting monotonically and wraparound
@ -123,7 +161,8 @@ int arc_counter_setup(void)
write_aux_reg(ARC_REG_TIMER1_CNT, 0);
write_aux_reg(ARC_REG_TIMER1_CTRL, TIMER_CTRL_NH);
return is_usable_as_clocksource();
/* Not usable in SMP */
return !IS_ENABLED(CONFIG_SMP);
}
static cycle_t arc_counter_read(struct clocksource *cs)
@ -139,6 +178,7 @@ static struct clocksource arc_counter = {
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
#endif
#endif
/********** Clock Event Device *********/

33
arch/arc/kernel/troubleshoot.c
View file

@ -14,6 +14,7 @@
#include <linux/proc_fs.h>
#include <linux/file.h>
#include <asm/arcregs.h>
#include <asm/irqflags.h>
/*
* Common routine to print scratch regs (r0-r12) or callee regs (r13-r25)
@ -34,7 +35,10 @@ static noinline void print_reg_file(long *reg_rev, int start_num)
n += scnprintf(buf + n, len - n, "\n");
/* because pt_regs has regs reversed: r12..r0, r25..r13 */
reg_rev--;
if (is_isa_arcv2() && start_num == 0)
reg_rev++;
else
reg_rev--;
}
if (start_num != 0)
@ -152,6 +156,15 @@ static void show_ecr_verbose(struct pt_regs *regs)
((cause_code == 0x02) ? "Write" : "EX"));
} else if (vec == ECR_V_INSN_ERR) {
pr_cont("Illegal Insn\n");
#ifdef CONFIG_ISA_ARCV2
} else if (vec == ECR_V_MEM_ERR) {
if (cause_code == 0x00)
pr_cont("Bus Error from Insn Mem\n");
else if (cause_code == 0x10)
pr_cont("Bus Error from Data Mem\n");
else
pr_cont("Bus Error, check PRM\n");
#endif
} else {
pr_cont("Check Programmer's Manual\n");
}
@ -185,12 +198,20 @@ void show_regs(struct pt_regs *regs)
pr_info("[STAT32]: 0x%08lx", regs->status32);
#define STS_BIT(r, bit) r->status32 & STATUS_##bit##_MASK ? #bit : ""
if (!user_mode(regs))
pr_cont(" : %2s %2s %2s %2s %2s\n",
STS_BIT(regs, AE), STS_BIT(regs, A2), STS_BIT(regs, A1),
STS_BIT(regs, E2), STS_BIT(regs, E1));
#define STS_BIT(r, bit) r->status32 & STATUS_##bit##_MASK ? #bit" " : ""
#ifdef CONFIG_ISA_ARCOMPACT
pr_cont(" : %2s%2s%2s%2s%2s%2s%2s\n",
(regs->status32 & STATUS_U_MASK) ? "U " : "K ",
STS_BIT(regs, DE), STS_BIT(regs, AE),
STS_BIT(regs, A2), STS_BIT(regs, A1),
STS_BIT(regs, E2), STS_BIT(regs, E1));
#else
pr_cont(" : %2s%2s%2s%2s\n",
STS_BIT(regs, IE),
(regs->status32 & STATUS_U_MASK) ? "U " : "K ",
STS_BIT(regs, DE), STS_BIT(regs, AE));
#endif
pr_info("BTA: 0x%08lx\t SP: 0x%08lx\t FP: 0x%08lx\n",
regs->bta, regs->sp, regs->fp);
pr_info("LPS: 0x%08lx\tLPE: 0x%08lx\tLPC: 0x%08lx\n",

6
arch/arc/lib/Makefile
View file

@ -5,5 +5,7 @@
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
lib-y := strchr-700.o strcmp.o strcpy-700.o strlen.o
lib-y += memcmp.o memcpy-700.o memset.o
lib-y := strchr-700.o strcpy-700.o strlen.o memcmp.o
lib-$(CONFIG_ISA_ARCOMPACT) += memcpy-700.o memset.o strcmp.o
lib-$(CONFIG_ISA_ARCV2) += memcpy-archs.o memset-archs.o strcmp-archs.o

30
arch/arc/lib/memcmp.S
View file

@ -24,14 +24,32 @@ ENTRY(memcmp)
ld r4,[r0,0]
ld r5,[r1,0]
lsr.f lp_count,r3,3
#ifdef CONFIG_ISA_ARCV2
/* In ARCv2 a branch can't be the last instruction in a zero overhead
* loop.
* So we move the branch to the start of the loop, duplicate it
* after the end, and set up r12 so that the branch isn't taken
* initially.
*/
mov_s r12,WORD2
lpne .Loop_end
brne WORD2,r12,.Lodd
ld WORD2,[r0,4]
#else
lpne .Loop_end
ld_s WORD2,[r0,4]
#endif
ld_s r12,[r1,4]
brne r4,r5,.Leven
ld.a r4,[r0,8]
ld.a r5,[r1,8]
#ifdef CONFIG_ISA_ARCV2
.Loop_end:
brne WORD2,r12,.Lodd
#else
brne WORD2,r12,.Lodd
.Loop_end:
#endif
asl_s SHIFT,SHIFT,3
bhs_s .Last_cmp
brne r4,r5,.Leven
@ -89,7 +107,6 @@ ENTRY(memcmp)
bset.cs r0,r0,31
.Lodd:
cmp_s WORD2,r12
mov_s r0,1
j_s.d [blink]
bset.cs r0,r0,31
@ -100,14 +117,25 @@ ENTRY(memcmp)
ldb r4,[r0,0]
ldb r5,[r1,0]
lsr.f lp_count,r3
#ifdef CONFIG_ISA_ARCV2
mov r12,r3
lpne .Lbyte_end
brne r3,r12,.Lbyte_odd
#else
lpne .Lbyte_end
#endif
ldb_s r3,[r0,1]
ldb r12,[r1,1]
brne r4,r5,.Lbyte_even
ldb.a r4,[r0,2]
ldb.a r5,[r1,2]
#ifdef CONFIG_ISA_ARCV2
.Lbyte_end:
brne r3,r12,.Lbyte_odd
#else
brne r3,r12,.Lbyte_odd
.Lbyte_end:
#endif
bcc .Lbyte_even
brne r4,r5,.Lbyte_even
ldb_s r3,[r0,1]

236
arch/arc/lib/memcpy-archs.S Normal file
View file

@ -0,0 +1,236 @@
/*
* Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/linkage.h>
#ifdef __LITTLE_ENDIAN__
# define SHIFT_1(RX,RY,IMM) asl RX, RY, IMM ; <<
# define SHIFT_2(RX,RY,IMM) lsr RX, RY, IMM ; >>
# define MERGE_1(RX,RY,IMM) asl RX, RY, IMM
# define MERGE_2(RX,RY,IMM)
# define EXTRACT_1(RX,RY,IMM) and RX, RY, 0xFFFF
# define EXTRACT_2(RX,RY,IMM) lsr RX, RY, IMM
#else
# define SHIFT_1(RX,RY,IMM) lsr RX, RY, IMM ; >>
# define SHIFT_2(RX,RY,IMM) asl RX, RY, IMM ; <<
# define MERGE_1(RX,RY,IMM) asl RX, RY, IMM ; <<
# define MERGE_2(RX,RY,IMM) asl RX, RY, IMM ; <<
# define EXTRACT_1(RX,RY,IMM) lsr RX, RY, IMM
# define EXTRACT_2(RX,RY,IMM) lsr RX, RY, 0x08
#endif
#ifdef CONFIG_ARC_HAS_LL64
# define PREFETCH_READ(RX) prefetch [RX, 56]
# define PREFETCH_WRITE(RX) prefetchw [RX, 64]
# define LOADX(DST,RX) ldd.ab DST, [RX, 8]
# define STOREX(SRC,RX) std.ab SRC, [RX, 8]
# define ZOLSHFT 5
# define ZOLAND 0x1F
#else
# define PREFETCH_READ(RX) prefetch [RX, 28]
# define PREFETCH_WRITE(RX) prefetchw [RX, 32]
# define LOADX(DST,RX) ld.ab DST, [RX, 4]
# define STOREX(SRC,RX) st.ab SRC, [RX, 4]
# define ZOLSHFT 4
# define ZOLAND 0xF
#endif
ENTRY(memcpy)
prefetch [r1] ; Prefetch the read location
prefetchw [r0] ; Prefetch the write location
mov.f 0, r2
;;; if size is zero
jz.d [blink]
mov r3, r0 ; don;t clobber ret val
;;; if size <= 8
cmp r2, 8
bls.d @smallchunk
mov.f lp_count, r2
and.f r4, r0, 0x03
rsub lp_count, r4, 4
lpnz @aligndestination
;; LOOP BEGIN
ldb.ab r5, [r1,1]
sub r2, r2, 1
stb.ab r5, [r3,1]
aligndestination:
;;; Check the alignment of the source
and.f r4, r1, 0x03
bnz.d @sourceunaligned
;;; CASE 0: Both source and destination are 32bit aligned
;;; Convert len to Dwords, unfold x4
lsr.f lp_count, r2, ZOLSHFT
lpnz @copy32_64bytes
;; LOOP START
LOADX (r6, r1)
PREFETCH_READ (r1)
PREFETCH_WRITE (r3)
LOADX (r8, r1)
LOADX (r10, r1)
LOADX (r4, r1)
STOREX (r6, r3)
STOREX (r8, r3)
STOREX (r10, r3)
STOREX (r4, r3)
copy32_64bytes:
and.f lp_count, r2, ZOLAND ;Last remaining 31 bytes
smallchunk:
lpnz @copyremainingbytes
;; LOOP START
ldb.ab r5, [r1,1]
stb.ab r5, [r3,1]
copyremainingbytes:
j [blink]
;;; END CASE 0
sourceunaligned:
cmp r4, 2
beq.d @unalignedOffby2
sub r2, r2, 1
bhi.d @unalignedOffby3
ldb.ab r5, [r1, 1]
;;; CASE 1: The source is unaligned, off by 1
;; Hence I need to read 1 byte for a 16bit alignment
;; and 2bytes to reach 32bit alignment
ldh.ab r6, [r1, 2]
sub r2, r2, 2
;; Convert to words, unfold x2
lsr.f lp_count, r2, 3
MERGE_1 (r6, r6, 8)
MERGE_2 (r5, r5, 24)
or r5, r5, r6
;; Both src and dst are aligned
lpnz @copy8bytes_1
;; LOOP START
ld.ab r6, [r1, 4]
prefetch [r1, 28] ;Prefetch the next read location
ld.ab r8, [r1,4]
prefetchw [r3, 32] ;Prefetch the next write location
SHIFT_1 (r7, r6, 24)
or r7, r7, r5
SHIFT_2 (r5, r6, 8)
SHIFT_1 (r9, r8, 24)
or r9, r9, r5
SHIFT_2 (r5, r8, 8)
st.ab r7, [r3, 4]
st.ab r9, [r3, 4]
copy8bytes_1:
;; Write back the remaining 16bits
EXTRACT_1 (r6, r5, 16)
sth.ab r6, [r3, 2]
;; Write back the remaining 8bits
EXTRACT_2 (r5, r5, 16)
stb.ab r5, [r3, 1]
and.f lp_count, r2, 0x07 ;Last 8bytes
lpnz @copybytewise_1
;; LOOP START
ldb.ab r6, [r1,1]
stb.ab r6, [r3,1]
copybytewise_1:
j [blink]
unalignedOffby2:
;;; CASE 2: The source is unaligned, off by 2
ldh.ab r5, [r1, 2]
sub r2, r2, 1
;; Both src and dst are aligned
;; Convert to words, unfold x2
lsr.f lp_count, r2, 3
#ifdef __BIG_ENDIAN__
asl.nz r5, r5, 16
#endif
lpnz @copy8bytes_2
;; LOOP START
ld.ab r6, [r1, 4]
prefetch [r1, 28] ;Prefetch the next read location
ld.ab r8, [r1,4]
prefetchw [r3, 32] ;Prefetch the next write location
SHIFT_1 (r7, r6, 16)
or r7, r7, r5
SHIFT_2 (r5, r6, 16)
SHIFT_1 (r9, r8, 16)
or r9, r9, r5
SHIFT_2 (r5, r8, 16)
st.ab r7, [r3, 4]
st.ab r9, [r3, 4]
copy8bytes_2:
#ifdef __BIG_ENDIAN__
lsr.nz r5, r5, 16
#endif
sth.ab r5, [r3, 2]
and.f lp_count, r2, 0x07 ;Last 8bytes
lpnz @copybytewise_2
;; LOOP START
ldb.ab r6, [r1,1]
stb.ab r6, [r3,1]
copybytewise_2:
j [blink]
unalignedOffby3:
;;; CASE 3: The source is unaligned, off by 3
;;; Hence, I need to read 1byte for achieve the 32bit alignment
;; Both src and dst are aligned
;; Convert to words, unfold x2
lsr.f lp_count, r2, 3
#ifdef __BIG_ENDIAN__
asl.ne r5, r5, 24
#endif
lpnz @copy8bytes_3
;; LOOP START
ld.ab r6, [r1, 4]
prefetch [r1, 28] ;Prefetch the next read location
ld.ab r8, [r1,4]
prefetch [r3, 32] ;Prefetch the next write location
SHIFT_1 (r7, r6, 8)
or r7, r7, r5
SHIFT_2 (r5, r6, 24)
SHIFT_1 (r9, r8, 8)
or r9, r9, r5
SHIFT_2 (r5, r8, 24)
st.ab r7, [r3, 4]
st.ab r9, [r3, 4]
copy8bytes_3:
#ifdef __BIG_ENDIAN__
lsr.nz r5, r5, 24
#endif
stb.ab r5, [r3, 1]
and.f lp_count, r2, 0x07 ;Last 8bytes
lpnz @copybytewise_3
;; LOOP START
ldb.ab r6, [r1,1]
stb.ab r6, [r3,1]
copybytewise_3:
j [blink]
END(memcpy)

93
arch/arc/lib/memset-archs.S Normal file
View file

@ -0,0 +1,93 @@
/*
* Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/linkage.h>
#undef PREALLOC_NOT_AVAIL
#ifdef PREALLOC_NOT_AVAIL
#define PREWRITE(A,B) prefetchw [(A),(B)]
#else
#define PREWRITE(A,B) prealloc [(A),(B)]
#endif
ENTRY(memset)
prefetchw [r0] ; Prefetch the write location
mov.f 0, r2
;;; if size is zero
jz.d [blink]
mov r3, r0 ; don't clobber ret val
;;; if length < 8
brls.d.nt r2, 8, .Lsmallchunk
mov.f lp_count,r2
and.f r4, r0, 0x03
rsub lp_count, r4, 4
lpnz @.Laligndestination
;; LOOP BEGIN
stb.ab r1, [r3,1]
sub r2, r2, 1
.Laligndestination:
;;; Destination is aligned
and r1, r1, 0xFF
asl r4, r1, 8
or r4, r4, r1
asl r5, r4, 16
or r5, r5, r4
mov r4, r5
sub3 lp_count, r2, 8
cmp r2, 64
bmsk.hi r2, r2, 5
mov.ls lp_count, 0
add3.hi r2, r2, 8
;;; Convert len to Dwords, unfold x8
lsr.f lp_count, lp_count, 6
lpnz @.Lset64bytes
;; LOOP START
PREWRITE(r3, 64) ;Prefetch the next write location
std.ab r4, [r3, 8]
std.ab r4, [r3, 8]
std.ab r4, [r3, 8]
std.ab r4, [r3, 8]
std.ab r4, [r3, 8]
std.ab r4, [r3, 8]
std.ab r4, [r3, 8]
std.ab r4, [r3, 8]
.Lset64bytes:
lsr.f lp_count, r2, 5 ;Last remaining max 124 bytes
lpnz .Lset32bytes
;; LOOP START
prefetchw [r3, 32] ;Prefetch the next write location
std.ab r4, [r3, 8]
std.ab r4, [r3, 8]
std.ab r4, [r3, 8]
std.ab r4, [r3, 8]
.Lset32bytes:
and.f lp_count, r2, 0x1F ;Last remaining 31 bytes
.Lsmallchunk:
lpnz .Lcopy3bytes
;; LOOP START
stb.ab r1, [r3, 1]
.Lcopy3bytes:
j [blink]
END(memset)
ENTRY(memzero)
; adjust bzero args to memset args
mov r2, r1
b.d memset ;tail call so need to tinker with blink
mov r1, 0
END(memzero)

78
arch/arc/lib/strcmp-archs.S Normal file
View file

@ -0,0 +1,78 @@
/*
* Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/linkage.h>
ENTRY(strcmp)
or r2, r0, r1
bmsk_s r2, r2, 1
brne r2, 0, @.Lcharloop
;;; s1 and s2 are word aligned
ld.ab r2, [r0, 4]
mov_s r12, 0x01010101
ror r11, r12
.align 4
.LwordLoop:
ld.ab r3, [r1, 4]
;; Detect NULL char in str1
sub r4, r2, r12
ld.ab r5, [r0, 4]
bic r4, r4, r2
and r4, r4, r11
brne.d.nt r4, 0, .LfoundNULL
;; Check if the read locations are the same
cmp r2, r3
beq.d .LwordLoop
mov.eq r2, r5
;; A match is found, spot it out
#ifdef __LITTLE_ENDIAN__
swape r3, r3
mov_s r0, 1
swape r2, r2
#else
mov_s r0, 1
#endif
cmp_s r2, r3
j_s.d [blink]
bset.lo r0, r0, 31
.align 4
.LfoundNULL:
#ifdef __BIG_ENDIAN__
swape r4, r4
swape r2, r2
swape r3, r3
#endif
;; Find null byte
ffs r0, r4
bmsk r2, r2, r0
bmsk r3, r3, r0
swape r2, r2
swape r3, r3
;; make the return value
sub.f r0, r2, r3
mov.hi r0, 1
j_s.d [blink]
bset.lo r0, r0, 31
.align 4
.Lcharloop:
ldb.ab r2, [r0, 1]
ldb.ab r3, [r1, 1]
nop
breq r2, 0, .Lcmpend
breq r2, r3, .Lcharloop
.align 4
.Lcmpend:
j_s.d [blink]
sub r0, r2, r3
END(strcmp)

2
arch/arc/mm/Makefile
View file

@ -7,4 +7,4 @@
#
obj-y := extable.o ioremap.o dma.o fault.o init.o
obj-y += tlb.o tlbex.o cache_arc700.o mmap.o
obj-y += tlb.o tlbex.o cache.o mmap.o

670
arch/arc/mm/cache_arc700.c → arch/arc/mm/cache.c
View file

@ -1,64 +1,12 @@
/*
* ARC700 VIPT Cache Management
* ARC Cache Management
*
* Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* vineetg: May 2011: for Non-aliasing VIPT D-cache following can be NOPs
* -flush_cache_dup_mm (fork)
* -likewise for flush_cache_mm (exit/execve)
* -likewise for flush_cache_range,flush_cache_page (munmap, exit, COW-break)
*
* vineetg: Apr 2011
* -Now that MMU can support larger pg sz (16K), the determiniation of
* aliasing shd not be based on assumption of 8k pg
*
* vineetg: Mar 2011
* -optimised version of flush_icache_range( ) for making I/D coherent
* when vaddr is available (agnostic of num of aliases)
*
* vineetg: Mar 2011
* -Added documentation about I-cache aliasing on ARC700 and the way it
* was handled up until MMU V2.
* -Spotted a three year old bug when killing the 4 aliases, which needs
* bottom 2 bits, so we need to do paddr | {0x00, 0x01, 0x02, 0x03}
* instead of paddr | {0x00, 0x01, 0x10, 0x11}
* (Rajesh you owe me one now)
*
* vineetg: Dec 2010
* -Off-by-one error when computing num_of_lines to flush
* This broke signal handling with bionic which uses synthetic sigret stub
*
* vineetg: Mar 2010
* -GCC can't generate ZOL for core cache flush loops.
* Conv them into iterations based as opposed to while (start < end) types
*
* Vineetg: July 2009
* -In I-cache flush routine we used to chk for aliasing for every line INV.
* Instead now we setup routines per cache geometry and invoke them
* via function pointers.
*
* Vineetg: Jan 2009
* -Cache Line flush routines used to flush an extra line beyond end addr
* because check was while (end >= start) instead of (end > start)
* =Some call sites had to work around by doing -1, -4 etc to end param
* =Some callers didnt care. This was spec bad in case of INV routines
* which would discard valid data (cause of the horrible ext2 bug
* in ARC IDE driver)
*
* vineetg: June 11th 2008: Fixed flush_icache_range( )
* -Since ARC700 caches are not coherent (I$ doesnt snoop D$) both need
* to be flushed, which it was not doing.
* -load_module( ) passes vmalloc addr (Kernel Virtual Addr) to the API,
* however ARC cache maintenance OPs require PHY addr. Thus need to do
* vmalloc_to_phy.
* -Also added optimisation there, that for range > PAGE SIZE we flush the
* entire cache in one shot rather than line by line. For e.g. a module
* with Code sz 600k, old code flushed 600k worth of cache (line-by-line),
* while cache is only 16 or 32k.
*/
#include <linux/module.h>
@ -73,9 +21,15 @@
#include <asm/cachectl.h>
#include <asm/setup.h>
static int l2_line_sz;
void (*_cache_line_loop_ic_fn)(unsigned long paddr, unsigned long vaddr,
unsigned long sz, const int cacheop);
char *arc_cache_mumbojumbo(int c, char *buf, int len)
{
int n = 0;
struct cpuinfo_arc_cache *p;
#define PR_CACHE(p, cfg, str) \
if (!(p)->ver) \
@ -91,6 +45,11 @@ char *arc_cache_mumbojumbo(int c, char *buf, int len)
PR_CACHE(&cpuinfo_arc700[c].icache, CONFIG_ARC_HAS_ICACHE, "I-Cache");
PR_CACHE(&cpuinfo_arc700[c].dcache, CONFIG_ARC_HAS_DCACHE, "D-Cache");
p = &cpuinfo_arc700[c].slc;
if (p->ver)
n += scnprintf(buf + n, len - n,
"SLC\t\t: %uK, %uB Line\n", p->sz_k, p->line_len);
return buf;
}
@ -101,7 +60,7 @@ char *arc_cache_mumbojumbo(int c, char *buf, int len)
*/
void read_decode_cache_bcr(void)
{
struct cpuinfo_arc_cache *p_ic, *p_dc;
struct cpuinfo_arc_cache *p_ic, *p_dc, *p_slc;
unsigned int cpu = smp_processor_id();
struct bcr_cache {
#ifdef CONFIG_CPU_BIG_ENDIAN
@ -111,14 +70,29 @@ void read_decode_cache_bcr(void)
#endif
} ibcr, dbcr;
struct bcr_generic sbcr;
struct bcr_slc_cfg {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned int pad:24, way:2, lsz:2, sz:4;
#else
unsigned int sz:4, lsz:2, way:2, pad:24;
#endif
} slc_cfg;
p_ic = &cpuinfo_arc700[cpu].icache;
READ_BCR(ARC_REG_IC_BCR, ibcr);
if (!ibcr.ver)
goto dc_chk;
BUG_ON(ibcr.config != 3);
p_ic->assoc = 2; /* Fixed to 2w set assoc */
if (ibcr.ver <= 3) {
BUG_ON(ibcr.config != 3);
p_ic->assoc = 2; /* Fixed to 2w set assoc */
} else if (ibcr.ver >= 4) {
p_ic->assoc = 1 << ibcr.config; /* 1,2,4,8 */
}
p_ic->line_len = 8 << ibcr.line_len;
p_ic->sz_k = 1 << (ibcr.sz - 1);
p_ic->ver = ibcr.ver;
@ -130,66 +104,40 @@ dc_chk:
READ_BCR(ARC_REG_DC_BCR, dbcr);
if (!dbcr.ver)
return;
goto slc_chk;
if (dbcr.ver <= 3) {
BUG_ON(dbcr.config != 2);
p_dc->assoc = 4; /* Fixed to 4w set assoc */
p_dc->vipt = 1;
p_dc->alias = p_dc->sz_k/p_dc->assoc/TO_KB(PAGE_SIZE) > 1;
} else if (dbcr.ver >= 4) {
p_dc->assoc = 1 << dbcr.config; /* 1,2,4,8 */
p_dc->vipt = 0;
p_dc->alias = 0; /* PIPT so can't VIPT alias */
}
BUG_ON(dbcr.config != 2);
p_dc->assoc = 4; /* Fixed to 4w set assoc */
p_dc->line_len = 16 << dbcr.line_len;
p_dc->sz_k = 1 << (dbcr.sz - 1);
p_dc->ver = dbcr.ver;
p_dc->vipt = 1;
p_dc->alias = p_dc->sz_k/p_dc->assoc/TO_KB(PAGE_SIZE) > 1;
slc_chk:
if (!is_isa_arcv2())
return;
p_slc = &cpuinfo_arc700[cpu].slc;
READ_BCR(ARC_REG_SLC_BCR, sbcr);
if (sbcr.ver) {
READ_BCR(ARC_REG_SLC_CFG, slc_cfg);
p_slc->ver = sbcr.ver;
p_slc->sz_k = 128 << slc_cfg.sz;
l2_line_sz = p_slc->line_len = (slc_cfg.lsz == 0) ? 128 : 64;
}
}
/*
* 1. Validate the Cache Geomtery (compile time config matches hardware)
* 2. If I-cache suffers from aliasing, setup work arounds (difft flush rtn)
* (aliasing D-cache configurations are not supported YET)
* 3. Enable the Caches, setup default flush mode for D-Cache
* 3. Calculate the SHMLBA used by user space
* Line Operation on {I,D}-Cache
*/
void arc_cache_init(void)
{
unsigned int __maybe_unused cpu = smp_processor_id();
char str[256];
printk(arc_cache_mumbojumbo(0, str, sizeof(str)));
if (IS_ENABLED(CONFIG_ARC_HAS_ICACHE)) {
struct cpuinfo_arc_cache *ic = &cpuinfo_arc700[cpu].icache;
if (!ic->ver)
panic("cache support enabled but non-existent cache\n");
if (ic->line_len != L1_CACHE_BYTES)
panic("ICache line [%d] != kernel Config [%d]",
ic->line_len, L1_CACHE_BYTES);
if (ic->ver != CONFIG_ARC_MMU_VER)
panic("Cache ver [%d] doesn't match MMU ver [%d]\n",
ic->ver, CONFIG_ARC_MMU_VER);
}
if (IS_ENABLED(CONFIG_ARC_HAS_DCACHE)) {
struct cpuinfo_arc_cache *dc = &cpuinfo_arc700[cpu].dcache;
int handled;
if (!dc->ver)
panic("cache support enabled but non-existent cache\n");
if (dc->line_len != L1_CACHE_BYTES)
panic("DCache line [%d] != kernel Config [%d]",
dc->line_len, L1_CACHE_BYTES);
/* check for D-Cache aliasing */
handled = IS_ENABLED(CONFIG_ARC_CACHE_VIPT_ALIASING);
if (dc->alias && !handled)
panic("Enable CONFIG_ARC_CACHE_VIPT_ALIASING\n");
else if (!dc->alias && handled)
panic("Don't need CONFIG_ARC_CACHE_VIPT_ALIASING\n");
}
}
#define OP_INV 0x1
#define OP_FLUSH 0x2
@ -197,162 +145,7 @@ void arc_cache_init(void)
#define OP_INV_IC 0x4
/*
* Common Helper for Line Operations on {I,D}-Cache
*/
static inline void __cache_line_loop(unsigned long paddr, unsigned long vaddr,
unsigned long sz, const int cacheop)
{
unsigned int aux_cmd, aux_tag;
int num_lines;
const int full_page_op = __builtin_constant_p(sz) && sz == PAGE_SIZE;
if (cacheop == OP_INV_IC) {
aux_cmd = ARC_REG_IC_IVIL;
#if (CONFIG_ARC_MMU_VER > 2)
aux_tag = ARC_REG_IC_PTAG;
#endif
}
else {
/* d$ cmd: INV (discard or wback-n-discard) OR FLUSH (wback) */
aux_cmd = cacheop & OP_INV ? ARC_REG_DC_IVDL : ARC_REG_DC_FLDL;
#if (CONFIG_ARC_MMU_VER > 2)
aux_tag = ARC_REG_DC_PTAG;
#endif
}
/* Ensure we properly floor/ceil the non-line aligned/sized requests
* and have @paddr - aligned to cache line and integral @num_lines.
* This however can be avoided for page sized since:
* -@paddr will be cache-line aligned already (being page aligned)
* -@sz will be integral multiple of line size (being page sized).
*/
if (!full_page_op) {
sz += paddr & ~CACHE_LINE_MASK;
paddr &= CACHE_LINE_MASK;
vaddr &= CACHE_LINE_MASK;
}
num_lines = DIV_ROUND_UP(sz, L1_CACHE_BYTES);
#if (CONFIG_ARC_MMU_VER <= 2)
/* MMUv2 and before: paddr contains stuffed vaddrs bits */
paddr |= (vaddr >> PAGE_SHIFT) & 0x1F;
#else
/* if V-P const for loop, PTAG can be written once outside loop */
if (full_page_op)
write_aux_reg(aux_tag, paddr);
#endif
while (num_lines-- > 0) {
#if (CONFIG_ARC_MMU_VER > 2)
/* MMUv3, cache ops require paddr seperately */
if (!full_page_op) {
write_aux_reg(aux_tag, paddr);
paddr += L1_CACHE_BYTES;
}
write_aux_reg(aux_cmd, vaddr);
vaddr += L1_CACHE_BYTES;
#else
write_aux_reg(aux_cmd, paddr);
paddr += L1_CACHE_BYTES;
#endif
}
}
#ifdef CONFIG_ARC_HAS_DCACHE
/***************************************************************
* Machine specific helpers for Entire D-Cache or Per Line ops
*/
static inline unsigned int __before_dc_op(const int op)
{
unsigned int reg = reg;
if (op == OP_FLUSH_N_INV) {
/* Dcache provides 2 cmd: FLUSH or INV
* INV inturn has sub-modes: DISCARD or FLUSH-BEFORE
* flush-n-inv is achieved by INV cmd but with IM=1
* So toggle INV sub-mode depending on op request and default
*/
reg = read_aux_reg(ARC_REG_DC_CTRL);
write_aux_reg(ARC_REG_DC_CTRL, reg | DC_CTRL_INV_MODE_FLUSH)
;
}
return reg;
}
static inline void __after_dc_op(const int op, unsigned int reg)
{
if (op & OP_FLUSH) /* flush / flush-n-inv both wait */
while (read_aux_reg(ARC_REG_DC_CTRL) & DC_CTRL_FLUSH_STATUS);
/* Switch back to default Invalidate mode */
if (op == OP_FLUSH_N_INV)
write_aux_reg(ARC_REG_DC_CTRL, reg & ~DC_CTRL_INV_MODE_FLUSH);
}
/*
* Operation on Entire D-Cache
* @cacheop = {OP_INV, OP_FLUSH, OP_FLUSH_N_INV}
* Note that constant propagation ensures all the checks are gone
* in generated code
*/
static inline void __dc_entire_op(const int cacheop)
{
unsigned int ctrl_reg;
int aux;
ctrl_reg = __before_dc_op(cacheop);
if (cacheop & OP_INV) /* Inv or flush-n-inv use same cmd reg */
aux = ARC_REG_DC_IVDC;
else
aux = ARC_REG_DC_FLSH;
write_aux_reg(aux, 0x1);
__after_dc_op(cacheop, ctrl_reg);
}
/* For kernel mappings cache operation: index is same as paddr */
#define __dc_line_op_k(p, sz, op) __dc_line_op(p, p, sz, op)
/*
* D-Cache : Per Line INV (discard or wback+discard) or FLUSH (wback)
*/
static inline void __dc_line_op(unsigned long paddr, unsigned long vaddr,
unsigned long sz, const int cacheop)
{
unsigned long flags;
unsigned int ctrl_reg;
local_irq_save(flags);
ctrl_reg = __before_dc_op(cacheop);
__cache_line_loop(paddr, vaddr, sz, cacheop);
__after_dc_op(cacheop, ctrl_reg);
local_irq_restore(flags);
}
#else
#define __dc_entire_op(cacheop)
#define __dc_line_op(paddr, vaddr, sz, cacheop)
#define __dc_line_op_k(paddr, sz, cacheop)
#endif /* CONFIG_ARC_HAS_DCACHE */
#ifdef CONFIG_ARC_HAS_ICACHE
/*
* I-Cache Aliasing in ARC700 VIPT caches
* I-Cache Aliasing in ARC700 VIPT caches (MMU v1-v3)
*
* ARC VIPT I-cache uses vaddr to index into cache and paddr to match the tag.
* The orig Cache Management Module "CDU" only required paddr to invalidate a
@ -393,9 +186,228 @@ static inline void __dc_line_op(unsigned long paddr, unsigned long vaddr,
* "tag" bits are provided in PTAG, index bits in existing IVIL/IVDL/FLDL regs
*/
/***********************************************************
* Machine specific helper for per line I-Cache invalidate.
static inline
void __cache_line_loop_v2(unsigned long paddr, unsigned long vaddr,
unsigned long sz, const int op)
{
unsigned int aux_cmd;
int num_lines;
const int full_page = __builtin_constant_p(sz) && sz == PAGE_SIZE;
if (op == OP_INV_IC) {
aux_cmd = ARC_REG_IC_IVIL;
} else {
/* d$ cmd: INV (discard or wback-n-discard) OR FLUSH (wback) */
aux_cmd = op & OP_INV ? ARC_REG_DC_IVDL : ARC_REG_DC_FLDL;
}
/* Ensure we properly floor/ceil the non-line aligned/sized requests
* and have @paddr - aligned to cache line and integral @num_lines.
* This however can be avoided for page sized since:
* -@paddr will be cache-line aligned already (being page aligned)
* -@sz will be integral multiple of line size (being page sized).
*/
if (!full_page) {
sz += paddr & ~CACHE_LINE_MASK;
paddr &= CACHE_LINE_MASK;
vaddr &= CACHE_LINE_MASK;
}
num_lines = DIV_ROUND_UP(sz, L1_CACHE_BYTES);
/* MMUv2 and before: paddr contains stuffed vaddrs bits */
paddr |= (vaddr >> PAGE_SHIFT) & 0x1F;
while (num_lines-- > 0) {
write_aux_reg(aux_cmd, paddr);
paddr += L1_CACHE_BYTES;
}
}
static inline
void __cache_line_loop_v3(unsigned long paddr, unsigned long vaddr,
unsigned long sz, const int op)
{
unsigned int aux_cmd, aux_tag;
int num_lines;
const int full_page = __builtin_constant_p(sz) && sz == PAGE_SIZE;
if (op == OP_INV_IC) {
aux_cmd = ARC_REG_IC_IVIL;
aux_tag = ARC_REG_IC_PTAG;
} else {
aux_cmd = op & OP_INV ? ARC_REG_DC_IVDL : ARC_REG_DC_FLDL;
aux_tag = ARC_REG_DC_PTAG;
}
/* Ensure we properly floor/ceil the non-line aligned/sized requests
* and have @paddr - aligned to cache line and integral @num_lines.
* This however can be avoided for page sized since:
* -@paddr will be cache-line aligned already (being page aligned)
* -@sz will be integral multiple of line size (being page sized).
*/
if (!full_page) {
sz += paddr & ~CACHE_LINE_MASK;
paddr &= CACHE_LINE_MASK;
vaddr &= CACHE_LINE_MASK;
}
num_lines = DIV_ROUND_UP(sz, L1_CACHE_BYTES);
/*
* MMUv3, cache ops require paddr in PTAG reg
* if V-P const for loop, PTAG can be written once outside loop
*/
if (full_page)
write_aux_reg(aux_tag, paddr);
while (num_lines-- > 0) {
if (!full_page) {
write_aux_reg(aux_tag, paddr);
paddr += L1_CACHE_BYTES;
}
write_aux_reg(aux_cmd, vaddr);
vaddr += L1_CACHE_BYTES;
}
}
/*
* In HS38x (MMU v4), although icache is VIPT, only paddr is needed for cache
* maintenance ops (in IVIL reg), as long as icache doesn't alias.
*
* For Aliasing icache, vaddr is also needed (in IVIL), while paddr is
* specified in PTAG (similar to MMU v3)
*/
static inline
void __cache_line_loop_v4(unsigned long paddr, unsigned long vaddr,
unsigned long sz, const int cacheop)
{
unsigned int aux_cmd;
int num_lines;
const int full_page_op = __builtin_constant_p(sz) && sz == PAGE_SIZE;
if (cacheop == OP_INV_IC) {
aux_cmd = ARC_REG_IC_IVIL;
} else {
/* d$ cmd: INV (discard or wback-n-discard) OR FLUSH (wback) */
aux_cmd = cacheop & OP_INV ? ARC_REG_DC_IVDL : ARC_REG_DC_FLDL;
}
/* Ensure we properly floor/ceil the non-line aligned/sized requests
* and have @paddr - aligned to cache line and integral @num_lines.
* This however can be avoided for page sized since:
* -@paddr will be cache-line aligned already (being page aligned)
* -@sz will be integral multiple of line size (being page sized).
*/
if (!full_page_op) {
sz += paddr & ~CACHE_LINE_MASK;
paddr &= CACHE_LINE_MASK;
}
num_lines = DIV_ROUND_UP(sz, L1_CACHE_BYTES);
while (num_lines-- > 0) {
write_aux_reg(aux_cmd, paddr);
paddr += L1_CACHE_BYTES;
}
}
#if (CONFIG_ARC_MMU_VER < 3)
#define __cache_line_loop __cache_line_loop_v2
#elif (CONFIG_ARC_MMU_VER == 3)
#define __cache_line_loop __cache_line_loop_v3
#elif (CONFIG_ARC_MMU_VER > 3)
#define __cache_line_loop __cache_line_loop_v4
#endif
#ifdef CONFIG_ARC_HAS_DCACHE
/***************************************************************
* Machine specific helpers for Entire D-Cache or Per Line ops
*/
static inline void __before_dc_op(const int op)
{
if (op == OP_FLUSH_N_INV) {
/* Dcache provides 2 cmd: FLUSH or INV
* INV inturn has sub-modes: DISCARD or FLUSH-BEFORE
* flush-n-inv is achieved by INV cmd but with IM=1
* So toggle INV sub-mode depending on op request and default
*/
const unsigned int ctl = ARC_REG_DC_CTRL;
write_aux_reg(ctl, read_aux_reg(ctl) | DC_CTRL_INV_MODE_FLUSH);
}
}
static inline void __after_dc_op(const int op)
{
if (op & OP_FLUSH) {
const unsigned int ctl = ARC_REG_DC_CTRL;
unsigned int reg;
/* flush / flush-n-inv both wait */
while ((reg = read_aux_reg(ctl)) & DC_CTRL_FLUSH_STATUS)
;
/* Switch back to default Invalidate mode */
if (op == OP_FLUSH_N_INV)
write_aux_reg(ctl, reg & ~DC_CTRL_INV_MODE_FLUSH);
}
}
/*
* Operation on Entire D-Cache
* @op = {OP_INV, OP_FLUSH, OP_FLUSH_N_INV}
* Note that constant propagation ensures all the checks are gone
* in generated code
*/
static inline void __dc_entire_op(const int op)
{
int aux;
__before_dc_op(op);
if (op & OP_INV) /* Inv or flush-n-inv use same cmd reg */
aux = ARC_REG_DC_IVDC;
else
aux = ARC_REG_DC_FLSH;
write_aux_reg(aux, 0x1);
__after_dc_op(op);
}
/* For kernel mappings cache operation: index is same as paddr */
#define __dc_line_op_k(p, sz, op) __dc_line_op(p, p, sz, op)
/*
* D-Cache Line ops: Per Line INV (discard or wback+discard) or FLUSH (wback)
*/
static inline void __dc_line_op(unsigned long paddr, unsigned long vaddr,
unsigned long sz, const int op)
{
unsigned long flags;
local_irq_save(flags);
__before_dc_op(op);
__cache_line_loop(paddr, vaddr, sz, op);
__after_dc_op(op);
local_irq_restore(flags);
}
#else
#define __dc_entire_op(op)
#define __dc_line_op(paddr, vaddr, sz, op)
#define __dc_line_op_k(paddr, sz, op)
#endif /* CONFIG_ARC_HAS_DCACHE */
#ifdef CONFIG_ARC_HAS_ICACHE
static inline void __ic_entire_inv(void)
{
@ -410,7 +422,7 @@ __ic_line_inv_vaddr_local(unsigned long paddr, unsigned long vaddr,
unsigned long flags;
local_irq_save(flags);
__cache_line_loop(paddr, vaddr, sz, OP_INV_IC);
(*_cache_line_loop_ic_fn)(paddr, vaddr, sz, OP_INV_IC);
local_irq_restore(flags);
}
@ -453,6 +465,53 @@ static void __ic_line_inv_vaddr(unsigned long paddr, unsigned long vaddr,
#endif /* CONFIG_ARC_HAS_ICACHE */
noinline void slc_op(unsigned long paddr, unsigned long sz, const int op)
{
#ifdef CONFIG_ISA_ARCV2
unsigned long flags;
unsigned int ctrl;
local_irq_save(flags);
/*
* The Region Flush operation is specified by CTRL.RGN_OP[11..9]
* - b'000 (default) is Flush,
* - b'001 is Invalidate if CTRL.IM == 0
* - b'001 is Flush-n-Invalidate if CTRL.IM == 1
*/
ctrl = read_aux_reg(ARC_REG_SLC_CTRL);
/* Don't rely on default value of IM bit */
if (!(op & OP_FLUSH)) /* i.e. OP_INV */
ctrl &= ~SLC_CTRL_IM; /* clear IM: Disable flush before Inv */
else
ctrl |= SLC_CTRL_IM;
if (op & OP_INV)
ctrl |= SLC_CTRL_RGN_OP_INV; /* Inv or flush-n-inv */
else
ctrl &= ~SLC_CTRL_RGN_OP_INV;
write_aux_reg(ARC_REG_SLC_CTRL, ctrl);
/*
* Lower bits are ignored, no need to clip
* END needs to be setup before START (latter triggers the operation)
* END can't be same as START, so add (l2_line_sz - 1) to sz
*/
write_aux_reg(ARC_REG_SLC_RGN_END, (paddr + sz + l2_line_sz - 1));
write_aux_reg(ARC_REG_SLC_RGN_START, paddr);
while (read_aux_reg(ARC_REG_SLC_CTRL) & SLC_CTRL_BUSY);
local_irq_restore(flags);
#endif
}
static inline int need_slc_flush(void)
{
return is_isa_arcv2() && l2_line_sz;
}
/***********************************************************
* Exported APIs
@ -493,7 +552,7 @@ void flush_dcache_page(struct page *page)
} else if (page_mapped(page)) {
/* kernel reading from page with U-mapping */
void *paddr = page_address(page);
unsigned long paddr = (unsigned long)page_address(page);
unsigned long vaddr = page->index << PAGE_CACHE_SHIFT;
if (addr_not_cache_congruent(paddr, vaddr))
@ -502,22 +561,30 @@ void flush_dcache_page(struct page *page)
}
EXPORT_SYMBOL(flush_dcache_page);
void dma_cache_wback_inv(unsigned long start, unsigned long sz)
{
__dc_line_op_k(start, sz, OP_FLUSH_N_INV);
if (need_slc_flush())
slc_op(start, sz, OP_FLUSH_N_INV);
}
EXPORT_SYMBOL(dma_cache_wback_inv);
void dma_cache_inv(unsigned long start, unsigned long sz)
{
__dc_line_op_k(start, sz, OP_INV);
if (need_slc_flush())
slc_op(start, sz, OP_INV);
}
EXPORT_SYMBOL(dma_cache_inv);
void dma_cache_wback(unsigned long start, unsigned long sz)
{
__dc_line_op_k(start, sz, OP_FLUSH);
if (need_slc_flush())
slc_op(start, sz, OP_FLUSH);
}
EXPORT_SYMBOL(dma_cache_wback);
@ -605,7 +672,7 @@ void __inv_icache_page(unsigned long paddr, unsigned long vaddr)
* wrapper to clearout kernel or userspace mappings of a page
* For kernel mappings @vaddr == @paddr
*/
void ___flush_dcache_page(unsigned long paddr, unsigned long vaddr)
void __flush_dcache_page(unsigned long paddr, unsigned long vaddr)
{
__dc_line_op(paddr, vaddr & PAGE_MASK, PAGE_SIZE, OP_FLUSH_N_INV);
}
@ -637,7 +704,7 @@ void flush_cache_page(struct vm_area_struct *vma, unsigned long u_vaddr,
u_vaddr &= PAGE_MASK;
___flush_dcache_page(paddr, u_vaddr);
__flush_dcache_page(paddr, u_vaddr);
if (vma->vm_flags & VM_EXEC)
__inv_icache_page(paddr, u_vaddr);
@ -663,8 +730,8 @@ void flush_anon_page(struct vm_area_struct *vma, struct page *page,
void copy_user_highpage(struct page *to, struct page *from,
unsigned long u_vaddr, struct vm_area_struct *vma)
{
void *kfrom = page_address(from);
void *kto = page_address(to);
unsigned long kfrom = (unsigned long)page_address(from);
unsigned long kto = (unsigned long)page_address(to);
int clean_src_k_mappings = 0;
/*
@ -680,7 +747,7 @@ void copy_user_highpage(struct page *to, struct page *from,
clean_src_k_mappings = 1;
}
copy_page(kto, kfrom);
copy_page((void *)kto, (void *)kfrom);
/*
* Mark DST page K-mapping as dirty for a later finalization by
@ -721,3 +788,56 @@ SYSCALL_DEFINE3(cacheflush, uint32_t, start, uint32_t, sz, uint32_t, flags)
flush_cache_all();
return 0;
}
void arc_cache_init(void)
{
unsigned int __maybe_unused cpu = smp_processor_id();
char str[256];
printk(arc_cache_mumbojumbo(0, str, sizeof(str)));
if (IS_ENABLED(CONFIG_ARC_HAS_ICACHE)) {
struct cpuinfo_arc_cache *ic = &cpuinfo_arc700[cpu].icache;
if (!ic->ver)
panic("cache support enabled but non-existent cache\n");
if (ic->line_len != L1_CACHE_BYTES)
panic("ICache line [%d] != kernel Config [%d]",
ic->line_len, L1_CACHE_BYTES);
if (ic->ver != CONFIG_ARC_MMU_VER)
panic("Cache ver [%d] doesn't match MMU ver [%d]\n",
ic->ver, CONFIG_ARC_MMU_VER);
/*
* In MMU v4 (HS38x) the alising icache config uses IVIL/PTAG
* pair to provide vaddr/paddr respectively, just as in MMU v3
*/
if (is_isa_arcv2() && ic->alias)
_cache_line_loop_ic_fn = __cache_line_loop_v3;
else
_cache_line_loop_ic_fn = __cache_line_loop;
}
if (IS_ENABLED(CONFIG_ARC_HAS_DCACHE)) {
struct cpuinfo_arc_cache *dc = &cpuinfo_arc700[cpu].dcache;
if (!dc->ver)
panic("cache support enabled but non-existent cache\n");
if (dc->line_len != L1_CACHE_BYTES)
panic("DCache line [%d] != kernel Config [%d]",
dc->line_len, L1_CACHE_BYTES);
/* check for D-Cache aliasing on ARCompact: ARCv2 has PIPT */
if (is_isa_arcompact()) {
int handled = IS_ENABLED(CONFIG_ARC_CACHE_VIPT_ALIASING);
if (dc->alias && !handled)
panic("Enable CONFIG_ARC_CACHE_VIPT_ALIASING\n");
else if (!dc->alias && handled)
panic("Disable CONFIG_ARC_CACHE_VIPT_ALIASING\n");
}
}
}

24
arch/arc/mm/dma.c
View file

@ -14,8 +14,6 @@
* Cache bit off in the TLB entry.
*
* The default DMA address == Phy address which is 0x8000_0000 based.
* A platform/device can make it zero based, by over-riding
* plat_{dma,kernel}_addr_to_{kernel,dma}
*/
#include <linux/dma-mapping.h>
@ -37,7 +35,7 @@ void *dma_alloc_noncoherent(struct device *dev, size_t size,
return NULL;
/* This is bus address, platform dependent */
*dma_handle = plat_kernel_addr_to_dma(dev, paddr);
*dma_handle = (dma_addr_t)paddr;
return paddr;
}
@ -46,8 +44,7 @@ EXPORT_SYMBOL(dma_alloc_noncoherent);
void dma_free_noncoherent(struct device *dev, size_t size, void *vaddr,
dma_addr_t dma_handle)
{
free_pages_exact((void *)plat_dma_addr_to_kernel(dev, dma_handle),
size);
free_pages_exact((void *)dma_handle, size);
}
EXPORT_SYMBOL(dma_free_noncoherent);
@ -67,7 +64,19 @@ void *dma_alloc_coherent(struct device *dev, size_t size,
memset(kvaddr, 0, size);
/* This is bus address, platform dependent */
*dma_handle = plat_kernel_addr_to_dma(dev, paddr);
*dma_handle = (dma_addr_t)paddr;
/*
* Evict any existing L1 and/or L2 lines for the backing page
* in case it was used earlier as a normal "cached" page.
* Yeah this bit us - STAR 9000898266
*
* Although core does call flush_cache_vmap(), it gets kvaddr hence
* can't be used to efficiently flush L1 and/or L2 which need paddr
* Currently flush_cache_vmap nukes the L1 cache completely which
* will be optimized as a separate commit
*/
dma_cache_wback_inv((unsigned long)paddr, size);
return kvaddr;
}
@ -78,8 +87,7 @@ void dma_free_coherent(struct device *dev, size_t size, void *kvaddr,
{
iounmap((void __force __iomem *)kvaddr);
free_pages_exact((void *)plat_dma_addr_to_kernel(dev, dma_handle),
size);
free_pages_exact((void *)dma_handle, size);
}
EXPORT_SYMBOL(dma_free_coherent);

60
arch/arc/mm/tlb.c
View file

@ -113,6 +113,8 @@ static inline void __tlb_entry_erase(void)
write_aux_reg(ARC_REG_TLBCOMMAND, TLBWrite);
}
#if (CONFIG_ARC_MMU_VER < 4)
static inline unsigned int tlb_entry_lkup(unsigned long vaddr_n_asid)
{
unsigned int idx;
@ -210,6 +212,28 @@ static void tlb_entry_insert(unsigned int pd0, unsigned int pd1)
write_aux_reg(ARC_REG_TLBCOMMAND, TLBWrite);
}
#else /* CONFIG_ARC_MMU_VER >= 4) */
static void utlb_invalidate(void)
{
/* No need since uTLB is always in sync with JTLB */
}
static void tlb_entry_erase(unsigned int vaddr_n_asid)
{
write_aux_reg(ARC_REG_TLBPD0, vaddr_n_asid | _PAGE_PRESENT);
write_aux_reg(ARC_REG_TLBCOMMAND, TLBDeleteEntry);
}
static void tlb_entry_insert(unsigned int pd0, unsigned int pd1)
{
write_aux_reg(ARC_REG_TLBPD0, pd0);
write_aux_reg(ARC_REG_TLBPD1, pd1);
write_aux_reg(ARC_REG_TLBCOMMAND, TLBInsertEntry);
}
#endif
/*
* Un-conditionally (without lookup) erase the entire MMU contents
*/
@ -582,23 +606,42 @@ void read_decode_mmu_bcr(void)
#endif
} *mmu3;
struct bcr_mmu_4 {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned int ver:8, sasid:1, sz1:4, sz0:4, res:2, pae:1,
n_ways:2, n_entry:2, n_super:2, u_itlb:3, u_dtlb:3;
#else
/* DTLB ITLB JES JE JA */
unsigned int u_dtlb:3, u_itlb:3, n_super:2, n_entry:2, n_ways:2,
pae:1, res:2, sz0:4, sz1:4, sasid:1, ver:8;
#endif
} *mmu4;
tmp = read_aux_reg(ARC_REG_MMU_BCR);
mmu->ver = (tmp >> 24);
if (mmu->ver <= 2) {
mmu2 = (struct bcr_mmu_1_2 *)&tmp;
mmu->pg_sz = PAGE_SIZE;
mmu->pg_sz_k = TO_KB(PAGE_SIZE);
mmu->sets = 1 << mmu2->sets;
mmu->ways = 1 << mmu2->ways;
mmu->u_dtlb = mmu2->u_dtlb;
mmu->u_itlb = mmu2->u_itlb;
} else {
} else if (mmu->ver == 3) {
mmu3 = (struct bcr_mmu_3 *)&tmp;
mmu->pg_sz = 512 << mmu3->pg_sz;
mmu->pg_sz_k = 1 << (mmu3->pg_sz - 1);
mmu->sets = 1 << mmu3->sets;
mmu->ways = 1 << mmu3->ways;
mmu->u_dtlb = mmu3->u_dtlb;
mmu->u_itlb = mmu3->u_itlb;
} else {
mmu4 = (struct bcr_mmu_4 *)&tmp;
mmu->pg_sz_k = 1 << (mmu4->sz0 - 1);
mmu->s_pg_sz_m = 1 << (mmu4->sz1 - 11);
mmu->sets = 64 << mmu4->n_entry;
mmu->ways = mmu4->n_ways * 2;
mmu->u_dtlb = mmu4->u_dtlb * 4;
mmu->u_itlb = mmu4->u_itlb * 4;
}
mmu->num_tlb = mmu->sets * mmu->ways;
@ -608,10 +651,15 @@ char *arc_mmu_mumbojumbo(int cpu_id, char *buf, int len)
{
int n = 0;
struct cpuinfo_arc_mmu *p_mmu = &cpuinfo_arc700[cpu_id].mmu;
char super_pg[64] = "";
if (p_mmu->s_pg_sz_m)
scnprintf(super_pg, 64, "%dM Super Page%s, ",
p_mmu->s_pg_sz_m, " (not used)");
n += scnprintf(buf + n, len - n,
"MMU [v%x]\t: %dk PAGE, JTLB %d (%dx%d), uDTLB %d, uITLB %d %s\n",
p_mmu->ver, TO_KB(p_mmu->pg_sz),
"MMU [v%x]\t: %dk PAGE, %sJTLB %d (%dx%d), uDTLB %d, uITLB %d %s\n",
p_mmu->ver, p_mmu->pg_sz_k, super_pg,
p_mmu->num_tlb, p_mmu->sets, p_mmu->ways,
p_mmu->u_dtlb, p_mmu->u_itlb,
IS_ENABLED(CONFIG_ARC_MMU_SASID) ? ",SASID" : "");
@ -639,7 +687,7 @@ void arc_mmu_init(void)
mmu->ver, CONFIG_ARC_MMU_VER);
}
if (mmu->pg_sz != PAGE_SIZE)
if (mmu->pg_sz_k != TO_KB(PAGE_SIZE))
panic("MMU pg size != PAGE_SIZE (%luk)\n", TO_KB(PAGE_SIZE));
/* Enable the MMU */

44
arch/arc/mm/tlbex.S
View file

@ -35,8 +35,6 @@
* Rahul Trivedi, Amit Bhor: Codito Technologies 2004
*/
.cpu A7
#include <linux/linkage.h>
#include <asm/entry.h>
#include <asm/mmu.h>
@ -46,6 +44,7 @@
#include <asm/processor.h>
#include <asm/tlb-mmu1.h>
#ifdef CONFIG_ISA_ARCOMPACT
;-----------------------------------------------------------------
; ARC700 Exception Handling doesn't auto-switch stack and it only provides
; ONE scratch AUX reg "ARC_REG_SCRATCH_DATA0"
@ -123,6 +122,24 @@ ex_saved_reg1:
#endif
.endm
#else /* ARCv2 */
.macro TLBMISS_FREEUP_REGS
PUSH r0
PUSH r1
PUSH r2
PUSH r3
.endm
.macro TLBMISS_RESTORE_REGS
POP r3
POP r2
POP r1
POP r0
.endm
#endif
;============================================================================
; Troubleshooting Stuff
;============================================================================
@ -241,6 +258,7 @@ ex_saved_reg1:
; Commit the TLB entry into MMU
.macro COMMIT_ENTRY_TO_MMU
#if (CONFIG_ARC_MMU_VER < 4)
/* Get free TLB slot: Set = computed from vaddr, way = random */
sr TLBGetIndex, [ARC_REG_TLBCOMMAND]
@ -251,6 +269,10 @@ ex_saved_reg1:
#else
sr TLBWrite, [ARC_REG_TLBCOMMAND]
#endif
#else
sr TLBInsertEntry, [ARC_REG_TLBCOMMAND]
#endif
.endm
@ -291,6 +313,7 @@ ENTRY(EV_TLBMissI)
CONV_PTE_TO_TLB
COMMIT_ENTRY_TO_MMU
TLBMISS_RESTORE_REGS
EV_TLBMissI_fast_ret: ; additional label for VDK OS-kit instrumentation
rtie
END(EV_TLBMissI)
@ -356,6 +379,7 @@ ENTRY(EV_TLBMissD)
COMMIT_ENTRY_TO_MMU
TLBMISS_RESTORE_REGS
EV_TLBMissD_fast_ret: ; additional label for VDK OS-kit instrumentation
rtie
;-------- Common routine to call Linux Page Fault Handler -----------
@ -366,19 +390,5 @@ do_slow_path_pf:
; Slow path TLB Miss handled as a regular ARC Exception
; (stack switching / save the complete reg-file).
EXCEPTION_PROLOGUE
; ------- setup args for Linux Page fault Hanlder ---------
mov_s r1, sp
lr r0, [efa]
; We don't want exceptions to be disabled while the fault is handled.
; Now that we have saved the context we return from exception hence
; exceptions get re-enable
FAKE_RET_FROM_EXCPN r9
bl do_page_fault
b ret_from_exception
b call_do_page_fault
END(EV_TLBMissD)

33
arch/arc/plat-arcfpga/Kconfig
View file

@ -1,33 +0,0 @@
#
# Copyright (C) 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
menuconfig ARC_PLAT_FPGA_LEGACY
bool "\"Legacy\" ARC FPGA dev Boards"
select ARC_HAS_COH_CACHES if SMP
help
Support for ARC development boards, provided by Synopsys.
These are based on FPGA or ISS. e.g.
- ARCAngel4
- ML509
- MetaWare ISS
if ARC_PLAT_FPGA_LEGACY
config ISS_SMP_EXTN
bool "ARC SMP Extensions (ISS Models only)"
default n
depends on SMP
help
SMP Extensions to ARC700, in a "simulation only" Model, supported in
ARC ISS (Instruction Set Simulator).
The SMP extensions include:
-IDU (Interrupt Distribution Unit)
-XTL (To enable CPU start/stop/set-PC for another CPU)
It doesn't provide coherent Caches and/or Atomic Ops (LLOCK/SCOND)
endif

118
arch/arc/plat-arcfpga/include/plat/smp.h
View file

@ -1,118 +0,0 @@
/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Rajeshwar Ranga: Interrupt Distribution Unit API's
*/
#ifndef __PLAT_ARCFPGA_SMP_H
#define __PLAT_ARCFPGA_SMP_H
#ifdef CONFIG_SMP
#include <linux/types.h>
#include <asm/arcregs.h>
#define ARC_AUX_IDU_REG_CMD 0x2000
#define ARC_AUX_IDU_REG_PARAM 0x2001
#define ARC_AUX_XTL_REG_CMD 0x2002
#define ARC_AUX_XTL_REG_PARAM 0x2003
#define ARC_REG_MP_BCR 0x2021
#define ARC_XTL_CMD_WRITE_PC 0x04
#define ARC_XTL_CMD_CLEAR_HALT 0x02
/*
* Build Configuration Register which identifies the sub-components
*/
struct bcr_mp {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned int mp_arch:16, pad:5, sdu:1, idu:1, scu:1, ver:8;
#else
unsigned int ver:8, scu:1, idu:1, sdu:1, pad:5, mp_arch:16;
#endif
};
/* IDU supports 256 common interrupts */
#define NR_IDU_IRQS 256
/*
* The Aux Regs layout is same bit-by-bit in both BE/LE modes.
* However when casted as a bitfield encoded "C" struct, gcc treats it as
* memory, generating different code for BE/LE, requiring strcture adj (see
* include/asm/arcregs.h)
*
* However when manually "carving" the value for a Aux, no special handling
* of BE is needed because of the property discribed above
*/
#define IDU_SET_COMMAND(irq, cmd) \
do { \
uint32_t __val; \
__val = (((irq & 0xFF) << 8) | (cmd & 0xFF)); \
write_aux_reg(ARC_AUX_IDU_REG_CMD, __val); \
} while (0)
#define IDU_SET_PARAM(par) write_aux_reg(ARC_AUX_IDU_REG_PARAM, par)
#define IDU_GET_PARAM() read_aux_reg(ARC_AUX_IDU_REG_PARAM)
/* IDU Commands */
#define IDU_DISABLE 0x00
#define IDU_ENABLE 0x01
#define IDU_IRQ_CLEAR 0x02
#define IDU_IRQ_ASSERT 0x03
#define IDU_IRQ_WMODE 0x04
#define IDU_IRQ_STATUS 0x05
#define IDU_IRQ_ACK 0x06
#define IDU_IRQ_PEND 0x07
#define IDU_IRQ_RMODE 0x08
#define IDU_IRQ_WBITMASK 0x09
#define IDU_IRQ_RBITMASK 0x0A
#define idu_enable() IDU_SET_COMMAND(0, IDU_ENABLE)
#define idu_disable() IDU_SET_COMMAND(0, IDU_DISABLE)
#define idu_irq_assert(irq) IDU_SET_COMMAND((irq), IDU_IRQ_ASSERT)
#define idu_irq_clear(irq) IDU_SET_COMMAND((irq), IDU_IRQ_CLEAR)
/* IDU Interrupt Mode - Destination Encoding */
#define IDU_IRQ_MOD_DISABLE 0x00
#define IDU_IRQ_MOD_ROUND_RECP 0x01
#define IDU_IRQ_MOD_TCPU_FIRSTRECP 0x02
#define IDU_IRQ_MOD_TCPU_ALLRECP 0x03
/* IDU Interrupt Mode - Triggering Mode */
#define IDU_IRQ_MODE_LEVEL_TRIG 0x00
#define IDU_IRQ_MODE_PULSE_TRIG 0x01
#define IDU_IRQ_MODE_PARAM(dest_mode, trig_mode) \
(((trig_mode & 0x01) << 15) | (dest_mode & 0xFF))
struct idu_irq_config {
uint8_t irq;
uint8_t dest_mode;
uint8_t trig_mode;
};
struct idu_irq_status {
uint8_t irq;
bool enabled;
bool status;
bool ack;
bool pend;
uint8_t next_rr;
};
extern void idu_irq_set_tgtcpu(uint8_t irq, uint32_t mask);
extern void idu_irq_set_mode(uint8_t irq, uint8_t dest_mode, uint8_t trig_mode);
extern void iss_model_init_smp(unsigned int cpu);
extern void iss_model_init_early_smp(void);
#endif /* CONFIG_SMP */
#endif

186
arch/arc/plat-arcfpga/smp.c
View file

@ -1,186 +0,0 @@
/*
* ARC700 Simulation-only Extensions for SMP
*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Vineet Gupta - 2012 : split off arch common and plat specific SMP
* Rajeshwar Ranga - 2007 : Interrupt Distribution Unit API's
*/
#include <linux/smp.h>
#include <linux/irq.h>
#include <plat/smp.h>
#define IDU_INTERRUPT_0 16
static char smp_cpuinfo_buf[128];
/*
*-------------------------------------------------------------------
* Platform specific callbacks expected by arch SMP code
*-------------------------------------------------------------------
*/
/*
* Master kick starting another CPU
*/
static void iss_model_smp_wakeup_cpu(int cpu, unsigned long pc)
{
/* setup the start PC */
write_aux_reg(ARC_AUX_XTL_REG_PARAM, pc);
/* Trigger WRITE_PC cmd for this cpu */
write_aux_reg(ARC_AUX_XTL_REG_CMD,
(ARC_XTL_CMD_WRITE_PC | (cpu << 8)));
/* Take the cpu out of Halt */
write_aux_reg(ARC_AUX_XTL_REG_CMD,
(ARC_XTL_CMD_CLEAR_HALT | (cpu << 8)));
}
static inline int get_hw_config_num_irq(void)
{
uint32_t val = read_aux_reg(ARC_REG_VECBASE_BCR);
switch (val & 0x03) {
case 0:
return 16;
case 1:
return 32;
case 2:
return 8;
default:
return 0;
}
return 0;
}
/*
* Any SMP specific init any CPU does when it comes up.
* Here we setup the CPU to enable Inter-Processor-Interrupts
* Called for each CPU
* -Master : init_IRQ()
* -Other(s) : start_kernel_secondary()
*/
void iss_model_init_smp(unsigned int cpu)
{
/* Check if CPU is configured for more than 16 interrupts */
if (NR_IRQS <= 16 || get_hw_config_num_irq() <= 16)
panic("[arcfpga] IRQ system can't support IDU IPI\n");
idu_disable();
/****************************************************************
* IDU provides a set of Common IRQs, each of which can be dynamically
* attached to (1|many|all) CPUs.
* The Common IRQs [0-15] are mapped as CPU pvt [16-31]
*
* Here we use a simple 1:1 mapping:
* A CPU 'x' is wired to Common IRQ 'x'.
* So an IDU ASSERT on IRQ 'x' will trigger Interupt on CPU 'x', which
* makes up for our simple IPI plumbing.
*
* TBD: Have a dedicated multicast IRQ for sending IPIs to all CPUs
* w/o having to do one-at-a-time
******************************************************************/
/*
* Claim an IRQ which would trigger IPI on this CPU.
* In IDU parlance it involves setting up a cpu bitmask for the IRQ
* The bitmap here contains only 1 CPU (self).
*/
idu_irq_set_tgtcpu(cpu, 0x1 << cpu);
/* Set the IRQ destination to use the bitmask above */
idu_irq_set_mode(cpu, 7, /* XXX: IDU_IRQ_MOD_TCPU_ALLRECP: ISS bug */
IDU_IRQ_MODE_PULSE_TRIG);
idu_enable();
/* Attach the arch-common IPI ISR to our IDU IRQ */
smp_ipi_irq_setup(cpu, IDU_INTERRUPT_0 + cpu);
}
static void iss_model_ipi_send(int cpu)
{
idu_irq_assert(cpu);
}
static void iss_model_ipi_clear(int irq)
{
idu_irq_clear(IDU_INTERRUPT_0 + smp_processor_id());
}
void iss_model_init_early_smp(void)
{
#define IS_AVAIL1(var, str) ((var) ? str : "")
struct bcr_mp mp;
READ_BCR(ARC_REG_MP_BCR, mp);
sprintf(smp_cpuinfo_buf, "Extn [ISS-SMP]: v%d, arch(%d) %s %s %s\n",
mp.ver, mp.mp_arch, IS_AVAIL1(mp.scu, "SCU"),
IS_AVAIL1(mp.idu, "IDU"), IS_AVAIL1(mp.sdu, "SDU"));
plat_smp_ops.info = smp_cpuinfo_buf;
plat_smp_ops.cpu_kick = iss_model_smp_wakeup_cpu;
plat_smp_ops.ipi_send = iss_model_ipi_send;
plat_smp_ops.ipi_clear = iss_model_ipi_clear;
}
/*
*-------------------------------------------------------------------
* Low level Platform IPI Providers
*-------------------------------------------------------------------
*/
/* Set the Mode for the Common IRQ */
void idu_irq_set_mode(uint8_t irq, uint8_t dest_mode, uint8_t trig_mode)
{
uint32_t par = IDU_IRQ_MODE_PARAM(dest_mode, trig_mode);
IDU_SET_PARAM(par);
IDU_SET_COMMAND(irq, IDU_IRQ_WMODE);
}
/* Set the target cpu Bitmask for Common IRQ */
void idu_irq_set_tgtcpu(uint8_t irq, uint32_t mask)
{
IDU_SET_PARAM(mask);
IDU_SET_COMMAND(irq, IDU_IRQ_WBITMASK);
}
/* Get the Interrupt Acknowledged status for IRQ (as CPU Bitmask) */
bool idu_irq_get_ack(uint8_t irq)
{
uint32_t val;
IDU_SET_COMMAND(irq, IDU_IRQ_ACK);
val = IDU_GET_PARAM();
return val & (1 << irq);
}
/*
* Get the Interrupt Pending status for IRQ (as CPU Bitmask)
* -Pending means CPU has not yet noticed the IRQ (e.g. disabled)
* -After Interrupt has been taken, the IPI expcitily needs to be
* cleared, to be acknowledged.
*/
bool idu_irq_get_pend(uint8_t irq)
{
uint32_t val;
IDU_SET_COMMAND(irq, IDU_IRQ_PEND);
val = IDU_GET_PARAM();
return val & (1 << irq);
}

46
arch/arc/plat-axs10x/Kconfig Normal file
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@ -0,0 +1,46 @@
#
# Copyright (C) 2013-15 Synopsys, Inc. (www.synopsys.com)
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
menuconfig ARC_PLAT_AXS10X
bool "Synopsys ARC AXS10x Software Development Platforms"
select DW_APB_ICTL
select GPIO_DWAPB
select OF_GPIO
select GENERIC_IRQ_CHIP
select ARCH_REQUIRE_GPIOLIB
help
Support for the ARC AXS10x Software Development Platforms.
The AXS10x Platforms consist of a mainboard with peripherals,
on which several daughter cards can be placed. The daughter cards
typically contain a CPU and memory.
if ARC_PLAT_AXS10X
config AXS101
depends on ISA_ARCOMPACT
bool "AXS101 with AXC001 CPU Card (ARC 770D/EM6/AS221)"
help
This adds support for the 770D/EM6/AS221 CPU Card. Only the ARC
770D is supported in Linux.
The AXS101 Platform consists of an AXS10x mainboard with
this daughtercard. Please use the axs101.dts device tree
with this configuration.
config AXS103
bool "AXS103 with AXC003 CPU Card (ARC HS38x)"
depends on ISA_ARCV2
help
This adds support for the HS38x CPU Card.
The AXS103 Platform consists of an AXS10x mainboard with
this daughtercard. Please use the axs103.dts device tree
with this configuration.
endif

9
arch/arc/plat-axs10x/Makefile Normal file
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#
# Copyright (C) 2013-15 Synopsys, Inc. (www.synopsys.com)
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
obj-$(CONFIG_ARC_PLAT_AXS10X) += axs10x.o

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