1
2#ifndef _ASM_PAGE_H
3#define _ASM_PAGE_H
4
5#include <asm/virtconvert.h>
6#include <asm/mem-layout.h>
7#include <asm/sections.h>
8#include <asm/setup.h>
9
10#ifndef __ASSEMBLY__
11
12#define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE)
13#define copy_page(to,from) memcpy((to), (from), PAGE_SIZE)
14
15#define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE)
16#define copy_user_page(vto, vfrom, vaddr, topg) memcpy((vto), (vfrom), PAGE_SIZE)
17
18
19
20
21typedef struct { unsigned long pte; } pte_t;
22typedef struct { unsigned long ste[64];} pmd_t;
23typedef struct { pmd_t pue[1]; } pud_t;
24typedef struct { pud_t pge[1]; } pgd_t;
25typedef struct { unsigned long pgprot; } pgprot_t;
26typedef struct page *pgtable_t;
27
28#define pte_val(x) ((x).pte)
29#define pmd_val(x) ((x).ste[0])
30#define pud_val(x) ((x).pue[0])
31#define pgd_val(x) ((x).pge[0])
32#define pgprot_val(x) ((x).pgprot)
33
34#define __pte(x) ((pte_t) { (x) } )
35#define __pmd(x) ((pmd_t) { { (x) } } )
36#define __pud(x) ((pud_t) { (x) } )
37#define __pgd(x) ((pgd_t) { (x) } )
38#define __pgprot(x) ((pgprot_t) { (x) } )
39#define PTE_MASK PAGE_MASK
40
41#define devmem_is_allowed(pfn) 1
42
43#define __pa(vaddr) virt_to_phys((void *) (unsigned long) (vaddr))
44#define __va(paddr) phys_to_virt((unsigned long) (paddr))
45
46#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
47
48extern unsigned long max_low_pfn;
49extern unsigned long min_low_pfn;
50extern unsigned long max_pfn;
51
52#ifdef CONFIG_MMU
53#define pfn_valid(pfn) ((pfn) < max_mapnr)
54#else
55#define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT)
56#define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_low_pfn)
57
58#endif
59
60#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
61#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
62
63
64#define VM_DATA_DEFAULT_FLAGS \
65 (VM_READ | VM_WRITE | \
66 ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
67 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
68
69#endif
70
71#include <asm-generic/memory_model.h>
72#include <asm-generic/getorder.h>
73
74#endif
75