projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | #ifndef _ASM_PAGE_H |
| 2 | #define _ASM_PAGE_H | |
| 3 | ||
| 1da177e4 LT |
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 | * These are used to make use of C type-checking.. | |
| 22 | */ | |
| 23 | typedef struct { unsigned long pte; } pte_t; | |
| 24 | typedef struct { unsigned long ste[64];} pmd_t; | |
| 25 | typedef struct { pmd_t pue[1]; } pud_t; | |
| 26 | typedef struct { pud_t pge[1]; } pgd_t; | |
| 27 | typedef struct { unsigned long pgprot; } pgprot_t; | |
| 2f569afd | 28 | typedef struct page *pgtable_t; |
| 1da177e4 LT |
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 | /* to align the pointer to the (next) page boundary */ | |
| 44 | #define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK) | |
| 45 | ||
| 1da177e4 LT |
46 | #define devmem_is_allowed(pfn) 1 |
| 47 | ||
| 8080f231 DH |
48 | #define __pa(vaddr) virt_to_phys((void *) (unsigned long) (vaddr)) |
| 49 | #define __va(paddr) phys_to_virt((unsigned long) (paddr)) | |
| 1da177e4 LT |
50 | |
| 51 | #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) | |
| 52 | ||
| 53 | extern unsigned long max_low_pfn; | |
| 54 | extern unsigned long min_low_pfn; | |
| 55 | extern unsigned long max_pfn; | |
| 56 | ||
| 57 | #ifdef CONFIG_MMU | |
| 1da177e4 | 58 | #define pfn_valid(pfn) ((pfn) < max_mapnr) |
| 1da177e4 | 59 | #else |
| 5cdac7ca | 60 | #define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT) |
| 1da177e4 LT |
61 | #define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_low_pfn) |
| 62 | ||
| 63 | #endif | |
| 64 | ||
| 65 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) | |
| 66 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) | |
| 67 | ||
| 68 | ||
| 69 | #ifdef CONFIG_MMU | |
| 70 | #define VM_DATA_DEFAULT_FLAGS \ | |
| 71 | (VM_READ | VM_WRITE | \ | |
| 72 | ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ | |
| 73 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
| 74 | #endif | |
| 75 | ||
| 76 | #endif /* __ASSEMBLY__ */ | |
| 77 | ||
| 5cdac7ca | 78 | #include <asm-generic/memory_model.h> |
| fd4fd5aa SR |
79 | #include <asm-generic/page.h> |
| 80 | ||
| 1da177e4 | 81 | #endif /* _ASM_PAGE_H */ |