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- #ifndef _I386_PGTABLE_2LEVEL_H
- #define _I386_PGTABLE_2LEVEL_H
- #define pte_ERROR(e) \
- printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, (e).pte_low)
- #define pgd_ERROR(e) \
- printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
- /*
- * Certain architectures need to do special things when PTEs
- * within a page table are directly modified. Thus, the following
- * hook is made available.
- */
- static inline void native_set_pte(pte_t *ptep , pte_t pte)
- {
- *ptep = pte;
- }
- static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr,
- pte_t *ptep , pte_t pte)
- {
- native_set_pte(ptep, pte);
- }
- static inline void native_set_pmd(pmd_t *pmdp, pmd_t pmd)
- {
- *pmdp = pmd;
- }
- #ifndef CONFIG_PARAVIRT
- #define set_pte(pteptr, pteval) native_set_pte(pteptr, pteval)
- #define set_pte_at(mm,addr,ptep,pteval) native_set_pte_at(mm, addr, ptep, pteval)
- #define set_pmd(pmdptr, pmdval) native_set_pmd(pmdptr, pmdval)
- #endif
- #define set_pte_atomic(pteptr, pteval) set_pte(pteptr,pteval)
- #define set_pte_present(mm,addr,ptep,pteval) set_pte_at(mm,addr,ptep,pteval)
- #define pte_clear(mm,addr,xp) do { set_pte_at(mm, addr, xp, __pte(0)); } while (0)
- #define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0)
- static inline void native_pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *xp)
- {
- *xp = __pte(0);
- }
- #ifdef CONFIG_SMP
- static inline pte_t native_ptep_get_and_clear(pte_t *xp)
- {
- return __pte(xchg(&xp->pte_low, 0));
- }
- #else
- #define native_ptep_get_and_clear(xp) native_local_ptep_get_and_clear(xp)
- #endif
- #define pte_page(x) pfn_to_page(pte_pfn(x))
- #define pte_none(x) (!(x).pte_low)
- #define pte_pfn(x) (pte_val(x) >> PAGE_SHIFT)
- /*
- * All present pages are kernel-executable:
- */
- static inline int pte_exec_kernel(pte_t pte)
- {
- return 1;
- }
- /*
- * Bits 0, 6 and 7 are taken, split up the 29 bits of offset
- * into this range:
- */
- #define PTE_FILE_MAX_BITS 29
- #define pte_to_pgoff(pte) \
- ((((pte).pte_low >> 1) & 0x1f ) + (((pte).pte_low >> 8) << 5 ))
- #define pgoff_to_pte(off) \
- ((pte_t) { .pte_low = (((off) & 0x1f) << 1) + (((off) >> 5) << 8) + _PAGE_FILE })
- /* Encode and de-code a swap entry */
- #define __swp_type(x) (((x).val >> 1) & 0x1f)
- #define __swp_offset(x) ((x).val >> 8)
- #define __swp_entry(type, offset) ((swp_entry_t) { ((type) << 1) | ((offset) << 8) })
- #define __pte_to_swp_entry(pte) ((swp_entry_t) { (pte).pte_low })
- #define __swp_entry_to_pte(x) ((pte_t) { .pte = (x).val })
- #endif /* _I386_PGTABLE_2LEVEL_H */
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