f58007762f
Shifting them up into the vmalloc region prevents the following warning, when booting a zynq qemu target with more than 512mb of RAM: BUG: mapping for 0xe0000000 at 0xe0000000 out of vmalloc space In addition, it allows for reuse of these mappings when the proper drivers issue requests via ioremap(). There are currently unknown issues with the early uart mapping. For now, the uart will be mapped to a known working address. Signed-off-by: Josh Cartwright <josh.cartwright@ni.com> Cc: John Linn <john.linn@xilinx.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Tested-by: Michal Simek <michal.simek@xilinx.com>
116 lines
2.8 KiB
C
116 lines
2.8 KiB
C
/*
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* This file contains common code that is intended to be used across
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* boards so that it's not replicated.
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*
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* Copyright (C) 2011 Xilinx
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/cpumask.h>
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#include <linux/platform_device.h>
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#include <linux/clk.h>
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#include <linux/of_irq.h>
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#include <linux/of_platform.h>
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#include <linux/of.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include <asm/mach-types.h>
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#include <asm/page.h>
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#include <asm/hardware/gic.h>
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#include <asm/hardware/cache-l2x0.h>
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#include <mach/zynq_soc.h>
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#include "common.h"
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static struct of_device_id zynq_of_bus_ids[] __initdata = {
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{ .compatible = "simple-bus", },
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{}
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};
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/**
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* xilinx_init_machine() - System specific initialization, intended to be
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* called from board specific initialization.
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*/
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static void __init xilinx_init_machine(void)
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{
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/*
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* 64KB way size, 8-way associativity, parity disabled
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*/
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l2x0_of_init(0x02060000, 0xF0F0FFFF);
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of_platform_bus_probe(NULL, zynq_of_bus_ids, NULL);
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}
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static struct of_device_id irq_match[] __initdata = {
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{ .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
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{ }
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};
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/**
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* xilinx_irq_init() - Interrupt controller initialization for the GIC.
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*/
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static void __init xilinx_irq_init(void)
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{
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of_irq_init(irq_match);
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}
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/* The minimum devices needed to be mapped before the VM system is up and
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* running include the GIC, UART and Timer Counter.
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*/
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static struct map_desc io_desc[] __initdata = {
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{
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.virtual = TTC0_VIRT,
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.pfn = __phys_to_pfn(TTC0_PHYS),
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.length = TTC0_SIZE,
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.type = MT_DEVICE,
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}, {
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.virtual = SCU_PERIPH_VIRT,
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.pfn = __phys_to_pfn(SCU_PERIPH_PHYS),
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.length = SCU_PERIPH_SIZE,
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.type = MT_DEVICE,
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},
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#ifdef CONFIG_DEBUG_LL
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{
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.virtual = UART0_VIRT,
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.pfn = __phys_to_pfn(UART0_PHYS),
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.length = UART0_SIZE,
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.type = MT_DEVICE,
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},
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#endif
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};
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/**
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* xilinx_map_io() - Create memory mappings needed for early I/O.
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*/
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static void __init xilinx_map_io(void)
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{
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iotable_init(io_desc, ARRAY_SIZE(io_desc));
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}
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static const char *xilinx_dt_match[] = {
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"xlnx,zynq-ep107",
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NULL
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};
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MACHINE_START(XILINX_EP107, "Xilinx Zynq Platform")
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.map_io = xilinx_map_io,
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.init_irq = xilinx_irq_init,
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.handle_irq = gic_handle_irq,
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.init_machine = xilinx_init_machine,
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.timer = &xttcpss_sys_timer,
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.dt_compat = xilinx_dt_match,
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MACHINE_END
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