1#ifndef _ASM_PAGE_H
2#define _ASM_PAGE_H
3
4#include <asm/virtconvert.h>
5#include <asm/mem-layout.h>
6#include <asm/sections.h>
7#include <asm/setup.h>
8
9#ifndef __ASSEMBLY__
10
11#define get_user_page(vaddr) __get_free_page(GFP_KERNEL)
12#define free_user_page(page, addr) free_page(addr)
13
14#define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE)
15#define copy_page(to,from) memcpy((to), (from), PAGE_SIZE)
16
17#define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE)
18#define copy_user_page(vto, vfrom, vaddr, topg) memcpy((vto), (vfrom), PAGE_SIZE)
19
20
21
22
23typedef struct { unsigned long pte; } pte_t;
24typedef struct { unsigned long ste[64];} pmd_t;
25typedef struct { pmd_t pue[1]; } pud_t;
26typedef struct { pud_t pge[1]; } pgd_t;
27typedef struct { unsigned long pgprot; } pgprot_t;
28typedef struct page *pgtable_t;
29
30#define pte_val(x) ((x).pte)
31#define pmd_val(x) ((x).ste[0])
32#define pud_val(x) ((x).pue[0])
33#define pgd_val(x) ((x).pge[0])
34#define pgprot_val(x) ((x).pgprot)
35
36#define __pte(x) ((pte_t) { (x) } )
37#define __pmd(x) ((pmd_t) { (x) } )
38#define __pud(x) ((pud_t) { (x) } )
39#define __pgd(x) ((pgd_t) { (x) } )
40#define __pgprot(x) ((pgprot_t) { (x) } )
41#define PTE_MASK PAGE_MASK
42
43#define devmem_is_allowed(pfn) 1
44
45#define __pa(vaddr) virt_to_phys((void *) (unsigned long) (vaddr))
46#define __va(paddr) phys_to_virt((unsigned long) (paddr))
47
48#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
49
50extern unsigned long max_low_pfn;
51extern unsigned long min_low_pfn;
52extern unsigned long max_pfn;
53
54#ifdef CONFIG_MMU
55#define pfn_valid(pfn) ((pfn) < max_mapnr)
56#else
57#define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT)
58#define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_low_pfn)
59
60#endif
61
62#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
63#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
64
65
66#ifdef CONFIG_MMU
67#define VM_DATA_DEFAULT_FLAGS \
68 (VM_READ | VM_WRITE | \
69 ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
70 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
71#endif
72
73#endif
74
75#include <asm-generic/memory_model.h>
76#include <asm-generic/getorder.h>
77
78#endif
79
