Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _I386_PGTABLE_2LEVEL_H |
| 2 | #define _I386_PGTABLE_2LEVEL_H |
| 3 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
Jeremy Fitzhardinge | 3dc494e | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 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 | } |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 27 | #ifndef CONFIG_PARAVIRT |
Jeremy Fitzhardinge | 3dc494e | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 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) |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 31 | #endif |
| 32 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #define set_pte_atomic(pteptr, pteval) set_pte(pteptr,pteval) |
Zachary Amsden | d6d861e | 2006-09-30 23:29:36 -0700 | [diff] [blame] | 34 | #define set_pte_present(mm,addr,ptep,pteval) set_pte_at(mm,addr,ptep,pteval) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
Zachary Amsden | 6e5882c | 2006-04-27 11:32:29 -0700 | [diff] [blame] | 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 | |
Zachary Amsden | c2c1acc | 2007-05-02 19:27:19 +0200 | [diff] [blame] | 39 | static inline void native_pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *xp) |
| 40 | { |
| 41 | *xp = __pte(0); |
| 42 | } |
| 43 | |
Zachary Amsden | 142dd97 | 2007-05-02 19:27:19 +0200 | [diff] [blame] | 44 | #ifdef CONFIG_SMP |
Jeremy Fitzhardinge | 3dc494e | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 45 | static inline pte_t native_ptep_get_and_clear(pte_t *xp) |
| 46 | { |
| 47 | return __pte(xchg(&xp->pte_low, 0)); |
| 48 | } |
Zachary Amsden | 142dd97 | 2007-05-02 19:27:19 +0200 | [diff] [blame] | 49 | #else |
| 50 | #define native_ptep_get_and_clear(xp) native_local_ptep_get_and_clear(xp) |
| 51 | #endif |
Rusty Russell | 6049742 | 2006-09-25 23:32:30 -0700 | [diff] [blame] | 52 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | #define pte_page(x) pfn_to_page(pte_pfn(x)) |
| 54 | #define pte_none(x) (!(x).pte_low) |
Jeremy Fitzhardinge | 3dc494e | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 55 | #define pte_pfn(x) (pte_val(x) >> PAGE_SHIFT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | #define pfn_pte(pfn, prot) __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot)) |
| 57 | #define pfn_pmd(pfn, prot) __pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot)) |
| 58 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | * All present pages are kernel-executable: |
| 61 | */ |
| 62 | static inline int pte_exec_kernel(pte_t pte) |
| 63 | { |
| 64 | return 1; |
| 65 | } |
| 66 | |
| 67 | /* |
| 68 | * Bits 0, 6 and 7 are taken, split up the 29 bits of offset |
| 69 | * into this range: |
| 70 | */ |
| 71 | #define PTE_FILE_MAX_BITS 29 |
| 72 | |
| 73 | #define pte_to_pgoff(pte) \ |
| 74 | ((((pte).pte_low >> 1) & 0x1f ) + (((pte).pte_low >> 8) << 5 )) |
| 75 | |
| 76 | #define pgoff_to_pte(off) \ |
| 77 | ((pte_t) { (((off) & 0x1f) << 1) + (((off) >> 5) << 8) + _PAGE_FILE }) |
| 78 | |
| 79 | /* Encode and de-code a swap entry */ |
| 80 | #define __swp_type(x) (((x).val >> 1) & 0x1f) |
| 81 | #define __swp_offset(x) ((x).val >> 8) |
| 82 | #define __swp_entry(type, offset) ((swp_entry_t) { ((type) << 1) | ((offset) << 8) }) |
| 83 | #define __pte_to_swp_entry(pte) ((swp_entry_t) { (pte).pte_low }) |
| 84 | #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) |
| 85 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | #endif /* _I386_PGTABLE_2LEVEL_H */ |