projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | #ifndef _I386_PGTABLE_2LEVEL_H |
| 2 | #define _I386_PGTABLE_2LEVEL_H | |
| 3 | ||
| 4 | #include <asm-generic/pgtable-nopmd.h> | |
| 5 | ||
| 6 | #define pte_ERROR(e) \ | |
| 7 | printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, (e).pte_low) | |
| 8 | #define pgd_ERROR(e) \ | |
| 9 | printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e)) | |
| 10 | ||
| 11 | /* | |
| 12 | * Certain architectures need to do special things when PTEs | |
| 13 | * within a page table are directly modified. Thus, the following | |
| 14 | * hook is made available. | |
| 15 | */ | |
| 16 | #define set_pte(pteptr, pteval) (*(pteptr) = pteval) | |
| 17 | #define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval) | |
| 18 | #define set_pte_atomic(pteptr, pteval) set_pte(pteptr,pteval) | |
| 19 | #define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval)) | |
| 20 | ||
| 6e5882cf ZA |
21 | #define pte_clear(mm,addr,xp) do { set_pte_at(mm, addr, xp, __pte(0)); } while (0) |
| 22 | #define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0) | |
| 23 | ||
| 1da177e4 LT |
24 | #define ptep_get_and_clear(mm,addr,xp) __pte(xchg(&(xp)->pte_low, 0)) |
| 25 | #define pte_same(a, b) ((a).pte_low == (b).pte_low) | |
| 26 | #define pte_page(x) pfn_to_page(pte_pfn(x)) | |
| 27 | #define pte_none(x) (!(x).pte_low) | |
| 28 | #define pte_pfn(x) ((unsigned long)(((x).pte_low >> PAGE_SHIFT))) | |
| 29 | #define pfn_pte(pfn, prot) __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot)) | |
| 30 | #define pfn_pmd(pfn, prot) __pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot)) | |
| 31 | ||
| 1da177e4 LT |
32 | /* |
| 33 | * All present user pages are user-executable: | |
| 34 | */ | |
| 35 | static inline int pte_exec(pte_t pte) | |
| 36 | { | |
| 37 | return pte_user(pte); | |
| 38 | } | |
| 39 | ||
| 40 | /* | |
| 41 | * All present pages are kernel-executable: | |
| 42 | */ | |
| 43 | static inline int pte_exec_kernel(pte_t pte) | |
| 44 | { | |
| 45 | return 1; | |
| 46 | } | |
| 47 | ||
| 48 | /* | |
| 49 | * Bits 0, 6 and 7 are taken, split up the 29 bits of offset | |
| 50 | * into this range: | |
| 51 | */ | |
| 52 | #define PTE_FILE_MAX_BITS 29 | |
| 53 | ||
| 54 | #define pte_to_pgoff(pte) \ | |
| 55 | ((((pte).pte_low >> 1) & 0x1f ) + (((pte).pte_low >> 8) << 5 )) | |
| 56 | ||
| 57 | #define pgoff_to_pte(off) \ | |
| 58 | ((pte_t) { (((off) & 0x1f) << 1) + (((off) >> 5) << 8) + _PAGE_FILE }) | |
| 59 | ||
| 60 | /* Encode and de-code a swap entry */ | |
| 61 | #define __swp_type(x) (((x).val >> 1) & 0x1f) | |
| 62 | #define __swp_offset(x) ((x).val >> 8) | |
| 63 | #define __swp_entry(type, offset) ((swp_entry_t) { ((type) << 1) | ((offset) << 8) }) | |
| 64 | #define __pte_to_swp_entry(pte) ((swp_entry_t) { (pte).pte_low }) | |
| 65 | #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) | |
| 66 | ||
| 101f12af JB |
67 | void vmalloc_sync_all(void); |
| 68 | ||
| 1da177e4 | 69 | #endif /* _I386_PGTABLE_2LEVEL_H */ |