84 lines
1.9 KiB
C
84 lines
1.9 KiB
C
/*
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* arch/arm/mach-tegra/io.c
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*
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* Copyright (C) 2010 Google, Inc.
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*
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* Author:
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* Colin Cross <ccross@google.com>
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* Erik Gilling <konkers@google.com>
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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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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/mm.h>
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#include <linux/io.h>
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#include <asm/page.h>
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#include <asm/mach/map.h>
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#include "board.h"
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static struct map_desc tegra_io_desc[] __initdata = {
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{
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.virtual = IO_PPSB_VIRT,
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.pfn = __phys_to_pfn(IO_PPSB_PHYS),
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.length = IO_PPSB_SIZE,
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.type = MT_DEVICE,
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},
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{
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.virtual = IO_APB_VIRT,
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.pfn = __phys_to_pfn(IO_APB_PHYS),
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.length = IO_APB_SIZE,
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.type = MT_DEVICE,
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},
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{
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.virtual = IO_CPU_VIRT,
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.pfn = __phys_to_pfn(IO_CPU_PHYS),
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.length = IO_CPU_SIZE,
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.type = MT_DEVICE,
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},
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{
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.virtual = IO_IRAM_VIRT,
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.pfn = __phys_to_pfn(IO_IRAM_PHYS),
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.length = IO_IRAM_SIZE,
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.type = MT_DEVICE,
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},
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};
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void __init tegra_map_common_io(void)
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{
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iotable_init(tegra_io_desc, ARRAY_SIZE(tegra_io_desc));
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}
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/*
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* Intercept ioremap() requests for addresses in our fixed mapping regions.
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*/
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void __iomem *tegra_ioremap(unsigned long p, size_t size, unsigned int type)
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{
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void __iomem *v = IO_ADDRESS(p);
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if (v == NULL)
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v = __arm_ioremap(p, size, type);
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return v;
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}
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EXPORT_SYMBOL(tegra_ioremap);
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void tegra_iounmap(volatile void __iomem *addr)
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{
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unsigned long virt = (unsigned long)addr;
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if (virt >= VMALLOC_START && virt < VMALLOC_END)
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__iounmap(addr);
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}
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EXPORT_SYMBOL(tegra_iounmap);
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