avr32: Move sleep code into mach-at32ap

Create a new file, pm-at32ap700x.S, in mach-at32ap and move the CPU
idle sleep code there. Make it possible to disable the sleep code.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
This commit is contained in:
Haavard Skinnemoen 2008-02-24 23:24:26 +01:00 committed by Haavard Skinnemoen
parent 02f99d1ca7
commit 7e59128f31
5 changed files with 117 additions and 23 deletions

View file

@ -741,26 +741,6 @@ irq_level\level:
.section .irq.text,"ax",@progbits
.global cpu_idle_sleep
cpu_idle_sleep:
mask_interrupts
get_thread_info r8
ld.w r9, r8[TI_flags]
bld r9, TIF_NEED_RESCHED
brcs cpu_idle_enable_int_and_exit
sbr r9, TIF_CPU_GOING_TO_SLEEP
st.w r8[TI_flags], r9
unmask_interrupts
sleep 0
cpu_idle_skip_sleep:
mask_interrupts
ld.w r9, r8[TI_flags]
cbr r9, TIF_CPU_GOING_TO_SLEEP
st.w r8[TI_flags], r9
cpu_idle_enable_int_and_exit:
unmask_interrupts
retal r12
.global irq_level0
.global irq_level1
.global irq_level2

View file

@ -18,11 +18,11 @@
#include <asm/sysreg.h>
#include <asm/ocd.h>
#include <asm/arch/pm.h>
void (*pm_power_off)(void) = NULL;
EXPORT_SYMBOL(pm_power_off);
extern void cpu_idle_sleep(void);
/*
* This file handles the architecture-dependent parts of process handling..
*/

View file

@ -1,4 +1,4 @@
obj-y += at32ap.o clock.o intc.o extint.o pio.o hsmc.o
obj-$(CONFIG_CPU_AT32AP700X) += at32ap700x.o
obj-$(CONFIG_CPU_AT32AP700X) += at32ap700x.o pm-at32ap700x.o
obj-$(CONFIG_CPU_AT32AP700X) += time-tc.o
obj-$(CONFIG_CPU_FREQ_AT32AP) += cpufreq.o

View file

@ -0,0 +1,66 @@
/*
* Low-level Power Management code.
*
* Copyright (C) 2008 Atmel Corporation
*
* 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 <asm/asm.h>
#include <asm/asm-offsets.h>
#include <asm/thread_info.h>
#include <asm/arch/pm.h>
.section .bss, "wa", @nobits
.global disable_idle_sleep
.type disable_idle_sleep, @object
disable_idle_sleep:
.int 4
.size disable_idle_sleep, . - disable_idle_sleep
/* Keep this close to the irq handlers */
.section .irq.text, "ax", @progbits
/*
* void cpu_enter_idle(void)
*
* Put the CPU into "idle" mode, in which it will consume
* significantly less power.
*
* If an interrupt comes along in the window between
* unmask_interrupts and the sleep instruction below, the
* interrupt code will adjust the return address so that we
* never execute the sleep instruction. This is required
* because the AP7000 doesn't unmask interrupts when entering
* sleep modes; later CPUs may not need this workaround.
*/
.global cpu_enter_idle
.type cpu_enter_idle, @function
cpu_enter_idle:
mask_interrupts
get_thread_info r8
ld.w r9, r8[TI_flags]
bld r9, TIF_NEED_RESCHED
brcs .Lret_from_sleep
sbr r9, TIF_CPU_GOING_TO_SLEEP
st.w r8[TI_flags], r9
unmask_interrupts
sleep CPU_SLEEP_IDLE
.size cpu_idle_sleep, . - cpu_idle_sleep
/*
* Common return path for PM functions that don't run from
* SRAM.
*/
.global cpu_idle_skip_sleep
.type cpu_idle_skip_sleep, @function
cpu_idle_skip_sleep:
mask_interrupts
ld.w r9, r8[TI_flags]
cbr r9, TIF_CPU_GOING_TO_SLEEP
st.w r8[TI_flags], r9
.Lret_from_sleep:
unmask_interrupts
retal r12
.size cpu_idle_skip_sleep, . - cpu_idle_skip_sleep

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@ -0,0 +1,48 @@
/*
* AVR32 AP Power Management.
*
* Copyright (C) 2008 Atmel Corporation
*
* 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_AVR32_ARCH_PM_H
#define __ASM_AVR32_ARCH_PM_H
/* Possible arguments to the "sleep" instruction */
#define CPU_SLEEP_IDLE 0
#define CPU_SLEEP_FROZEN 1
#define CPU_SLEEP_STANDBY 2
#define CPU_SLEEP_STOP 3
#define CPU_SLEEP_STATIC 5
#ifndef __ASSEMBLY__
extern void cpu_enter_idle(void);
extern bool disable_idle_sleep;
static inline void cpu_disable_idle_sleep(void)
{
disable_idle_sleep = true;
}
static inline void cpu_enable_idle_sleep(void)
{
disable_idle_sleep = false;
}
static inline void cpu_idle_sleep(void)
{
/*
* If we're using the COUNT and COMPARE registers for
* timekeeping, we can't use the IDLE state.
*/
if (disable_idle_sleep)
cpu_relax();
else
cpu_enter_idle();
}
#endif
#endif /* __ASM_AVR32_ARCH_PM_H */