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, unsigned long addr,
30 pte_t *ptep, pte_t pte)
32 native_set_pte(ptep, pte);
35 static inline void native_pmd_clear(pmd_t *pmdp)
37 native_set_pmd(pmdp, __pmd(0));
40 static inline void native_pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *xp)
42 *xp = native_make_pte(0);
46 static inline pte_t native_ptep_get_and_clear(pte_t *xp)
48 return __pte(xchg(&xp->pte_low, 0));
51 #define native_ptep_get_and_clear(xp) native_local_ptep_get_and_clear(xp)
54 #define pte_page(x) pfn_to_page(pte_pfn(x))
55 #define pte_none(x) (!(x).pte_low)
56 #define pte_pfn(x) (pte_val(x) >> PAGE_SHIFT)
59 * All present pages are kernel-executable:
61 static inline int pte_exec_kernel(pte_t pte)
67 * Bits 0, 6 and 7 are taken, split up the 29 bits of offset
70 #define PTE_FILE_MAX_BITS 29
72 #define pte_to_pgoff(pte) \
73 ((((pte).pte_low >> 1) & 0x1f ) + (((pte).pte_low >> 8) << 5 ))
75 #define pgoff_to_pte(off) \
76 ((pte_t) { .pte_low = (((off) & 0x1f) << 1) + (((off) >> 5) << 8) + _PAGE_FILE })
78 /* Encode and de-code a swap entry */
79 #define __swp_type(x) (((x).val >> 1) & 0x1f)
80 #define __swp_offset(x) ((x).val >> 8)
81 #define __swp_entry(type, offset) ((swp_entry_t) { ((type) << 1) | ((offset) << 8) })
82 #define __pte_to_swp_entry(pte) ((swp_entry_t) { (pte).pte_low })
83 #define __swp_entry_to_pte(x) ((pte_t) { .pte = (x).val })
85 #endif /* _I386_PGTABLE_2LEVEL_H */