git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | #ifndef _I386_PGTABLE_2LEVEL_H |
| 2 | #define _I386_PGTABLE_2LEVEL_H | |
| 3 | ||
| 1da177e4 LT |
4 | #define pte_ERROR(e) \ |
| 5 | printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, (e).pte_low) | |
| 6 | #define pgd_ERROR(e) \ | |
| 7 | printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e)) | |
| 8 | ||
| 9 | /* | |
| 10 | * Certain architectures need to do special things when PTEs | |
| 11 | * within a page table are directly modified. Thus, the following | |
| 12 | * hook is made available. | |
| 13 | */ | |
| 3dc494e8 JF |
14 | static inline void native_set_pte(pte_t *ptep , pte_t pte) |
| 15 | { | |
| 16 | *ptep = pte; | |
| 17 | } | |
| 18 | static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr, | |
| 19 | pte_t *ptep , pte_t pte) | |
| 20 | { | |
| 21 | native_set_pte(ptep, pte); | |
| 22 | } | |
| 23 | static inline void native_set_pmd(pmd_t *pmdp, pmd_t pmd) | |
| 24 | { | |
| 25 | *pmdp = pmd; | |
| 26 | } | |
| da181a8b | 27 | #ifndef CONFIG_PARAVIRT |
| 3dc494e8 JF |
28 | #define set_pte(pteptr, pteval) native_set_pte(pteptr, pteval) |
| 29 | #define set_pte_at(mm,addr,ptep,pteval) native_set_pte_at(mm, addr, ptep, pteval) | |
| 30 | #define set_pmd(pmdptr, pmdval) native_set_pmd(pmdptr, pmdval) | |
| da181a8b RR |
31 | #endif |
| 32 | ||
| 1da177e4 | 33 | #define set_pte_atomic(pteptr, pteval) set_pte(pteptr,pteval) |
| d6d861e3 | 34 | #define set_pte_present(mm,addr,ptep,pteval) set_pte_at(mm,addr,ptep,pteval) |
| 1da177e4 | 35 | |
| 6e5882cf ZA |
36 | #define pte_clear(mm,addr,xp) do { set_pte_at(mm, addr, xp, __pte(0)); } while (0) |
| 37 | #define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0) | |
| 38 | ||
| c2c1accd ZA |
39 | static inline void native_pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *xp) |
| 40 | { | |
| 41 | *xp = __pte(0); | |
| 42 | } | |
| 43 | ||
| 3dc494e8 JF |
44 | static inline pte_t native_ptep_get_and_clear(pte_t *xp) |
| 45 | { | |
| 46 | return __pte(xchg(&xp->pte_low, 0)); | |
| 47 | } | |
| 6049742d | 48 | |
| 1da177e4 LT |
49 | #define pte_page(x) pfn_to_page(pte_pfn(x)) |
| 50 | #define pte_none(x) (!(x).pte_low) | |
| 3dc494e8 | 51 | #define pte_pfn(x) (pte_val(x) >> PAGE_SHIFT) |
| 1da177e4 LT |
52 | #define pfn_pte(pfn, prot) __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot)) |
| 53 | #define pfn_pmd(pfn, prot) __pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot)) | |
| 54 | ||
| 1da177e4 LT |
55 | /* |
| 56 | * All present user pages are user-executable: | |
| 57 | */ | |
| 58 | static inline int pte_exec(pte_t pte) | |
| 59 | { | |
| 60 | return pte_user(pte); | |
| 61 | } | |
| 62 | ||
| 63 | /* | |
| 64 | * All present pages are kernel-executable: | |
| 65 | */ | |
| 66 | static inline int pte_exec_kernel(pte_t pte) | |
| 67 | { | |
| 68 | return 1; | |
| 69 | } | |
| 70 | ||
| 71 | /* | |
| 72 | * Bits 0, 6 and 7 are taken, split up the 29 bits of offset | |
| 73 | * into this range: | |
| 74 | */ | |
| 75 | #define PTE_FILE_MAX_BITS 29 | |
| 76 | ||
| 77 | #define pte_to_pgoff(pte) \ | |
| 78 | ((((pte).pte_low >> 1) & 0x1f ) + (((pte).pte_low >> 8) << 5 )) | |
| 79 | ||
| 80 | #define pgoff_to_pte(off) \ | |
| 81 | ((pte_t) { (((off) & 0x1f) << 1) + (((off) >> 5) << 8) + _PAGE_FILE }) | |
| 82 | ||
| 83 | /* Encode and de-code a swap entry */ | |
| 84 | #define __swp_type(x) (((x).val >> 1) & 0x1f) | |
| 85 | #define __swp_offset(x) ((x).val >> 8) | |
| 86 | #define __swp_entry(type, offset) ((swp_entry_t) { ((type) << 1) | ((offset) << 8) }) | |
| 87 | #define __pte_to_swp_entry(pte) ((swp_entry_t) { (pte).pte_low }) | |
| 88 | #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) | |
| 89 | ||
| 90 | #endif /* _I386_PGTABLE_2LEVEL_H */ |