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/traps.h>
17 #include <asm/mach/arch.h>
21 void __init arm_mm_memblock_reserve(void)
24 * Register the exception vector page.
25 * some architectures which the DRAM is the exception vector to trap,
26 * alloc_page breaks with error, although it is not NULL, but "0."
28 memblock_reserve(CONFIG_VECTORS_BASE, PAGE_SIZE);
31 void __init sanity_check_meminfo(void)
33 phys_addr_t end = bank_phys_end(&meminfo.bank[meminfo.nr_banks - 1]);
34 high_memory = __va(end - 1) + 1;
38 * paging_init() sets up the page tables, initialises the zone memory
39 * maps, and sets up the zero page, bad page and bad page tables.
41 void __init paging_init(struct machine_desc *mdesc)
43 early_trap_init((void *)CONFIG_VECTORS_BASE);
48 * We don't need to do anything here for nommu machines.
50 void setup_mm_for_reboot(void)
54 void flush_dcache_page(struct page *page)
56 __cpuc_flush_dcache_area(page_address(page), PAGE_SIZE);
58 EXPORT_SYMBOL(flush_dcache_page);
60 void flush_kernel_dcache_page(struct page *page)
62 __cpuc_flush_dcache_area(page_address(page), PAGE_SIZE);
64 EXPORT_SYMBOL(flush_kernel_dcache_page);
66 void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
67 unsigned long uaddr, void *dst, const void *src,
70 memcpy(dst, src, len);
71 if (vma->vm_flags & VM_EXEC)
72 __cpuc_coherent_user_range(uaddr, uaddr + len);
75 void __iomem *__arm_ioremap_pfn(unsigned long pfn, unsigned long offset,
76 size_t size, unsigned int mtype)
78 if (pfn >= (0x100000000ULL >> PAGE_SHIFT))
80 return (void __iomem *) (offset + (pfn << PAGE_SHIFT));
82 EXPORT_SYMBOL(__arm_ioremap_pfn);
84 void __iomem *__arm_ioremap_pfn_caller(unsigned long pfn, unsigned long offset,
85 size_t size, unsigned int mtype, void *caller)
87 return __arm_ioremap_pfn(pfn, offset, size, mtype);
90 void __iomem *__arm_ioremap(phys_addr_t phys_addr, size_t size,
93 return (void __iomem *)phys_addr;
95 EXPORT_SYMBOL(__arm_ioremap);
97 void __iomem * (*arch_ioremap_caller)(phys_addr_t, size_t, unsigned int, void *);
99 void __iomem *__arm_ioremap_caller(phys_addr_t phys_addr, size_t size,
100 unsigned int mtype, void *caller)
102 return __arm_ioremap(phys_addr, size, mtype);
105 void (*arch_iounmap)(volatile void __iomem *);
107 void __arm_iounmap(volatile void __iomem *addr)
110 EXPORT_SYMBOL(__arm_iounmap);