2 * linux/arch/arm/mm/nommu.c
4 * ARM uCLinux supporting functions.
6 #include <linux/module.h>
8 #include <linux/pagemap.h>
10 #include <linux/memblock.h>
12 #include <asm/cacheflush.h>
13 #include <asm/sections.h>
15 #include <asm/setup.h>
16 #include <asm/mach/arch.h>
20 void __init arm_mm_memblock_reserve(void)
23 * Register the exception vector page.
24 * some architectures which the DRAM is the exception vector to trap,
25 * alloc_page breaks with error, although it is not NULL, but "0."
27 memblock_reserve(CONFIG_VECTORS_BASE, PAGE_SIZE);
30 void __init sanity_check_meminfo(void)
35 * paging_init() sets up the page tables, initialises the zone memory
36 * maps, and sets up the zero page, bad page and bad page tables.
38 void __init paging_init(struct machine_desc *mdesc)
44 * We don't need to do anything here for nommu machines.
46 void setup_mm_for_reboot(char mode)
50 void flush_dcache_page(struct page *page)
52 __cpuc_flush_dcache_area(page_address(page), PAGE_SIZE);
54 EXPORT_SYMBOL(flush_dcache_page);
56 void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
57 unsigned long uaddr, void *dst, const void *src,
60 memcpy(dst, src, len);
61 if (vma->vm_flags & VM_EXEC)
62 __cpuc_coherent_user_range(uaddr, uaddr + len);
65 void __iomem *__arm_ioremap_pfn(unsigned long pfn, unsigned long offset,
66 size_t size, unsigned int mtype)
68 if (pfn >= (0x100000000ULL >> PAGE_SHIFT))
70 return (void __iomem *) (offset + (pfn << PAGE_SHIFT));
72 EXPORT_SYMBOL(__arm_ioremap_pfn);
74 void __iomem *__arm_ioremap_pfn_caller(unsigned long pfn, unsigned long offset,
75 size_t size, unsigned int mtype, void *caller)
77 return __arm_ioremap_pfn(pfn, offset, size, mtype);
80 void __iomem *__arm_ioremap(unsigned long phys_addr, size_t size,
83 return (void __iomem *)phys_addr;
85 EXPORT_SYMBOL(__arm_ioremap);
87 void __iomem *__arm_ioremap_caller(unsigned long phys_addr, size_t size,
88 unsigned int mtype, void *caller)
90 return __arm_ioremap(phys_addr, size, mtype);
93 void __iounmap(volatile void __iomem *addr)
96 EXPORT_SYMBOL(__iounmap);