99 lines
2.3 KiB
C
99 lines
2.3 KiB
C
/*
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* linux/arch/arm/mm/nommu.c
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*
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* ARM uCLinux supporting functions.
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*/
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#include <linux/module.h>
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#include <linux/mm.h>
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#include <linux/pagemap.h>
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#include <linux/io.h>
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#include <linux/memblock.h>
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#include <asm/cacheflush.h>
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#include <asm/sections.h>
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#include <asm/page.h>
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#include <asm/setup.h>
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#include <asm/mach/arch.h>
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#include "mm.h"
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void __init arm_mm_memblock_reserve(void)
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{
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/*
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* Register the exception vector page.
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* some architectures which the DRAM is the exception vector to trap,
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* alloc_page breaks with error, although it is not NULL, but "0."
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*/
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memblock_reserve(CONFIG_VECTORS_BASE, PAGE_SIZE);
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}
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void __init sanity_check_meminfo(void)
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{
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phys_addr_t end = bank_phys_end(&meminfo.bank[meminfo.nr_banks - 1]);
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high_memory = __va(end - 1) + 1;
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}
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/*
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* paging_init() sets up the page tables, initialises the zone memory
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* maps, and sets up the zero page, bad page and bad page tables.
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*/
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void __init paging_init(struct machine_desc *mdesc)
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{
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bootmem_init();
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}
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/*
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* We don't need to do anything here for nommu machines.
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*/
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void setup_mm_for_reboot(void)
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{
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}
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void flush_dcache_page(struct page *page)
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{
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__cpuc_flush_dcache_area(page_address(page), PAGE_SIZE);
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}
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EXPORT_SYMBOL(flush_dcache_page);
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void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
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unsigned long uaddr, void *dst, const void *src,
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unsigned long len)
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{
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memcpy(dst, src, len);
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if (vma->vm_flags & VM_EXEC)
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__cpuc_coherent_user_range(uaddr, uaddr + len);
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}
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void __iomem *__arm_ioremap_pfn(unsigned long pfn, unsigned long offset,
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size_t size, unsigned int mtype)
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{
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if (pfn >= (0x100000000ULL >> PAGE_SHIFT))
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return NULL;
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return (void __iomem *) (offset + (pfn << PAGE_SHIFT));
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}
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EXPORT_SYMBOL(__arm_ioremap_pfn);
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void __iomem *__arm_ioremap_pfn_caller(unsigned long pfn, unsigned long offset,
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size_t size, unsigned int mtype, void *caller)
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{
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return __arm_ioremap_pfn(pfn, offset, size, mtype);
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}
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void __iomem *__arm_ioremap(unsigned long phys_addr, size_t size,
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unsigned int mtype)
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{
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return (void __iomem *)phys_addr;
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}
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EXPORT_SYMBOL(__arm_ioremap);
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void __iomem *__arm_ioremap_caller(unsigned long phys_addr, size_t size,
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unsigned int mtype, void *caller)
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{
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return __arm_ioremap(phys_addr, size, mtype);
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}
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void __iounmap(volatile void __iomem *addr)
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{
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}
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EXPORT_SYMBOL(__iounmap);
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