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)
32 phys_addr_t end = bank_phys_end(&meminfo.bank[meminfo.nr_banks - 1]);
33 high_memory = __va(end - 1) + 1;
37 * paging_init() sets up the page tables, initialises the zone memory
38 * maps, and sets up the zero page, bad page and bad page tables.
40 void __init paging_init(struct machine_desc *mdesc)
46 * We don't need to do anything here for nommu machines.
48 void setup_mm_for_reboot(char mode)
52 void flush_dcache_page(struct page *page)
54 __cpuc_flush_dcache_area(page_address(page), PAGE_SIZE);
56 EXPORT_SYMBOL(flush_dcache_page);
58 void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
59 unsigned long uaddr, void *dst, const void *src,
62 memcpy(dst, src, len);
63 if (vma->vm_flags & VM_EXEC)
64 __cpuc_coherent_user_range(uaddr, uaddr + len);
67 void __iomem *__arm_ioremap_pfn(unsigned long pfn, unsigned long offset,
68 size_t size, unsigned int mtype)
70 if (pfn >= (0x100000000ULL >> PAGE_SHIFT))
72 return (void __iomem *) (offset + (pfn << PAGE_SHIFT));
74 EXPORT_SYMBOL(__arm_ioremap_pfn);
76 void __iomem *__arm_ioremap_pfn_caller(unsigned long pfn, unsigned long offset,
77 size_t size, unsigned int mtype, void *caller)
79 return __arm_ioremap_pfn(pfn, offset, size, mtype);
82 void __iomem *__arm_ioremap(unsigned long phys_addr, size_t size,
85 return (void __iomem *)phys_addr;
87 EXPORT_SYMBOL(__arm_ioremap);
89 void __iomem *__arm_ioremap_caller(unsigned long phys_addr, size_t size,
90 unsigned int mtype, void *caller)
92 return __arm_ioremap(phys_addr, size, mtype);
95 void __iounmap(volatile void __iomem *addr)
98 EXPORT_SYMBOL(__iounmap);