1 #ifndef _I386_PGTABLE_2LEVEL_H
2 #define _I386_PGTABLE_2LEVEL_H
5 printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, (e).pte_low)
7 printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
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.
14 static inline void native_set_pte(pte_t *ptep , pte_t pte)
19 static inline void native_set_pmd(pmd_t *pmdp, pmd_t pmd)
24 static inline void native_set_pte_atomic(pte_t *ptep, pte_t pte)
26 native_set_pte(ptep, pte);
29 static inline void native_set_pte_present(struct mm_struct *mm,
31 pte_t *ptep, pte_t pte)
33 native_set_pte(ptep, pte);
36 static inline void native_pmd_clear(pmd_t *pmdp)
38 native_set_pmd(pmdp, __pmd(0));
41 static inline void native_pte_clear(struct mm_struct *mm,
42 unsigned long addr, pte_t *xp)
44 *xp = native_make_pte(0);
48 static inline pte_t native_ptep_get_and_clear(pte_t *xp)
50 return __pte(xchg(&xp->pte_low, 0));
53 #define native_ptep_get_and_clear(xp) native_local_ptep_get_and_clear(xp)
56 #define pte_page(x) pfn_to_page(pte_pfn(x))
57 #define pte_none(x) (!(x).pte_low)
58 #define pte_pfn(x) (pte_val(x) >> PAGE_SHIFT)
61 * Bits 0, 6 and 7 are taken, split up the 29 bits of offset
64 #define PTE_FILE_MAX_BITS 29
66 #define pte_to_pgoff(pte) \
67 ((((pte).pte_low >> 1) & 0x1f) + (((pte).pte_low >> 8) << 5))
69 #define pgoff_to_pte(off) \
70 ((pte_t) { .pte_low = (((off) & 0x1f) << 1) + \
71 (((off) >> 5) << 8) + _PAGE_FILE })
73 /* Encode and de-code a swap entry */
74 #define __swp_type(x) (((x).val >> 1) & 0x1f)
75 #define __swp_offset(x) ((x).val >> 8)
76 #define __swp_entry(type, offset) \
77 ((swp_entry_t) { ((type) << 1) | ((offset) << 8) })
78 #define __pte_to_swp_entry(pte) ((swp_entry_t) { (pte).pte_low })
79 #define __swp_entry_to_pte(x) ((pte_t) { .pte = (x).val })
81 #endif /* _I386_PGTABLE_2LEVEL_H */