2 * linux/arch/arm/mm/nommu.c
4 * ARM uCLinux supporting functions.
6 #include <linux/module.h>
8 #include <linux/pagemap.h>
10 #include <asm/cacheflush.h>
16 extern void _stext, __data_start, _end;
19 * Reserve the various regions of node 0
21 void __init reserve_node_zero(pg_data_t *pgdat)
24 * Register the kernel text and data with bootmem.
25 * Note that this can only be in node 0.
27 #ifdef CONFIG_XIP_KERNEL
28 reserve_bootmem_node(pgdat, __pa(&__data_start), &_end - &__data_start);
30 reserve_bootmem_node(pgdat, __pa(&_stext), &_end - &_stext);
34 * Register the exception vector page.
35 * some architectures which the DRAM is the exception vector to trap,
36 * alloc_page breaks with error, although it is not NULL, but "0."
38 reserve_bootmem_node(pgdat, CONFIG_VECTORS_BASE, PAGE_SIZE);
42 * paging_init() sets up the page tables, initialises the zone memory
43 * maps, and sets up the zero page, bad page and bad page tables.
45 void __init paging_init(struct meminfo *mi, struct machine_desc *mdesc)
50 void flush_dcache_page(struct page *page)
52 __cpuc_flush_dcache_page(page_address(page));
54 EXPORT_SYMBOL(flush_dcache_page);
56 void __iomem *__ioremap_pfn(unsigned long pfn, unsigned long offset,
57 size_t size, unsigned long flags)
59 if (pfn >= (0x100000000ULL >> PAGE_SHIFT))
61 return (void __iomem *) (offset + (pfn << PAGE_SHIFT));
63 EXPORT_SYMBOL(__ioremap_pfn);
65 void __iomem *__ioremap(unsigned long phys_addr, size_t size,
68 return (void __iomem *)phys_addr;
70 EXPORT_SYMBOL(__ioremap);
72 void __iounmap(void __iomem *addr)
75 EXPORT_SYMBOL(__iounmap);