1/*
 2 *  linux/arch/arm/mm/nommu.c
 3 *
 4 * ARM uCLinux supporting functions.
 5 */
 6#include <linux/module.h>
 7#include <linux/mm.h>
 8#include <linux/pagemap.h>
 9#include <linux/io.h>
10#include <linux/memblock.h>
11
12#include <asm/cacheflush.h>
13#include <asm/sections.h>
14#include <asm/page.h>
15#include <asm/setup.h>
 
16#include <asm/mach/arch.h>
17
18#include "mm.h"
19
20void __init arm_mm_memblock_reserve(void)
21{
22	/*
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."
26	 */
27	memblock_reserve(CONFIG_VECTORS_BASE, PAGE_SIZE);
28}
29
30void __init sanity_check_meminfo(void)
31{
 
 
32}
33
34/*
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.
37 */
38void __init paging_init(struct machine_desc *mdesc)
39{
 
40	bootmem_init();
41}
42
43/*
44 * We don't need to do anything here for nommu machines.
45 */
46void setup_mm_for_reboot(char mode)
47{
48}
49
50void flush_dcache_page(struct page *page)
51{
52	__cpuc_flush_dcache_area(page_address(page), PAGE_SIZE);
53}
54EXPORT_SYMBOL(flush_dcache_page);
55
56void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
57		       unsigned long uaddr, void *dst, const void *src,
58		       unsigned long len)
59{
60	memcpy(dst, src, len);
61	if (vma->vm_flags & VM_EXEC)
62		__cpuc_coherent_user_range(uaddr, uaddr + len);
63}
64
65void __iomem *__arm_ioremap_pfn(unsigned long pfn, unsigned long offset,
66				size_t size, unsigned int mtype)
67{
68	if (pfn >= (0x100000000ULL >> PAGE_SHIFT))
69		return NULL;
70	return (void __iomem *) (offset + (pfn << PAGE_SHIFT));
71}
72EXPORT_SYMBOL(__arm_ioremap_pfn);
73
74void __iomem *__arm_ioremap_pfn_caller(unsigned long pfn, unsigned long offset,
75			   size_t size, unsigned int mtype, void *caller)
76{
77	return __arm_ioremap_pfn(pfn, offset, size, mtype);
78}
79
80void __iomem *__arm_ioremap(unsigned long phys_addr, size_t size,
81			    unsigned int mtype)
82{
83	return (void __iomem *)phys_addr;
84}
85EXPORT_SYMBOL(__arm_ioremap);
86
 
 
87void __iomem *__arm_ioremap_caller(unsigned long phys_addr, size_t size,
88				   unsigned int mtype, void *caller)
89{
90	return __arm_ioremap(phys_addr, size, mtype);
91}
92
93void __iounmap(volatile void __iomem *addr)
 
 
94{
95}
96EXPORT_SYMBOL(__iounmap);

  1/*
  2 *  linux/arch/arm/mm/nommu.c
  3 *
  4 * ARM uCLinux supporting functions.
  5 */
  6#include <linux/module.h>
  7#include <linux/mm.h>
  8#include <linux/pagemap.h>
  9#include <linux/io.h>
 10#include <linux/memblock.h>
 11
 12#include <asm/cacheflush.h>
 13#include <asm/sections.h>
 14#include <asm/page.h>
 15#include <asm/setup.h>
 16#include <asm/traps.h>
 17#include <asm/mach/arch.h>
 18
 19#include "mm.h"
 20
 21void __init arm_mm_memblock_reserve(void)
 22{
 23	/*
 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."
 27	 */
 28	memblock_reserve(CONFIG_VECTORS_BASE, PAGE_SIZE);
 29}
 30
 31void __init sanity_check_meminfo(void)
 32{
 33	phys_addr_t end = bank_phys_end(&meminfo.bank[meminfo.nr_banks - 1]);
 34	high_memory = __va(end - 1) + 1;
 35}
 36
 37/*
 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.
 40 */
 41void __init paging_init(struct machine_desc *mdesc)
 42{
 43	early_trap_init((void *)CONFIG_VECTORS_BASE);
 44	bootmem_init();
 45}
 46
 47/*
 48 * We don't need to do anything here for nommu machines.
 49 */
 50void setup_mm_for_reboot(void)
 51{
 52}
 53
 54void flush_dcache_page(struct page *page)
 55{
 56	__cpuc_flush_dcache_area(page_address(page), PAGE_SIZE);
 57}
 58EXPORT_SYMBOL(flush_dcache_page);
 59
 60void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
 61		       unsigned long uaddr, void *dst, const void *src,
 62		       unsigned long len)
 63{
 64	memcpy(dst, src, len);
 65	if (vma->vm_flags & VM_EXEC)
 66		__cpuc_coherent_user_range(uaddr, uaddr + len);
 67}
 68
 69void __iomem *__arm_ioremap_pfn(unsigned long pfn, unsigned long offset,
 70				size_t size, unsigned int mtype)
 71{
 72	if (pfn >= (0x100000000ULL >> PAGE_SHIFT))
 73		return NULL;
 74	return (void __iomem *) (offset + (pfn << PAGE_SHIFT));
 75}
 76EXPORT_SYMBOL(__arm_ioremap_pfn);
 77
 78void __iomem *__arm_ioremap_pfn_caller(unsigned long pfn, unsigned long offset,
 79			   size_t size, unsigned int mtype, void *caller)
 80{
 81	return __arm_ioremap_pfn(pfn, offset, size, mtype);
 82}
 83
 84void __iomem *__arm_ioremap(unsigned long phys_addr, size_t size,
 85			    unsigned int mtype)
 86{
 87	return (void __iomem *)phys_addr;
 88}
 89EXPORT_SYMBOL(__arm_ioremap);
 90
 91void __iomem * (*arch_ioremap_caller)(unsigned long, size_t, unsigned int, void *);
 92
 93void __iomem *__arm_ioremap_caller(unsigned long phys_addr, size_t size,
 94				   unsigned int mtype, void *caller)
 95{
 96	return __arm_ioremap(phys_addr, size, mtype);
 97}
 98
 99void (*arch_iounmap)(volatile void __iomem *);
100
101void __arm_iounmap(volatile void __iomem *addr)
102{
103}
104EXPORT_SYMBOL(__arm_iounmap);