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- #ifndef _ASM_X86_PGTABLE_2LEVEL_H
- #define _ASM_X86_PGTABLE_2LEVEL_H
- #define pte_ERROR(e) \
- pr_err("%s:%d: bad pte %08lx\n", __FILE__, __LINE__, (e).pte_low)
- #define pgd_ERROR(e) \
- pr_err("%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_pmd(pmd_t *pmdp, pmd_t pmd)
- {
- *pmdp = pmd;
- }
- static inline void native_set_pte_atomic(pte_t *ptep, pte_t pte)
- {
- native_set_pte(ptep, pte);
- }
- static inline void native_pmd_clear(pmd_t *pmdp)
- {
- native_set_pmd(pmdp, __pmd(0));
- }
- static inline void native_pte_clear(struct mm_struct *mm,
- unsigned long addr, pte_t *xp)
- {
- *xp = native_make_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
- #ifdef CONFIG_SMP
- static inline pmd_t native_pmdp_get_and_clear(pmd_t *xp)
- {
- return __pmd(xchg((pmdval_t *)xp, 0));
- }
- #else
- #define native_pmdp_get_and_clear(xp) native_local_pmdp_get_and_clear(xp)
- #endif
- /* Bit manipulation helper on pte/pgoff entry */
- static inline unsigned long pte_bitop(unsigned long value, unsigned int rightshift,
- unsigned long mask, unsigned int leftshift)
- {
- return ((value >> rightshift) & mask) << leftshift;
- }
- /* Encode and de-code a swap entry */
- #define SWP_TYPE_BITS 5
- #define SWP_OFFSET_SHIFT (_PAGE_BIT_PROTNONE + 1)
- #define MAX_SWAPFILES_CHECK() BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > SWP_TYPE_BITS)
- #define __swp_type(x) (((x).val >> (_PAGE_BIT_PRESENT + 1)) \
- & ((1U << SWP_TYPE_BITS) - 1))
- #define __swp_offset(x) ((x).val >> SWP_OFFSET_SHIFT)
- #define __swp_entry(type, offset) ((swp_entry_t) { \
- ((type) << (_PAGE_BIT_PRESENT + 1)) \
- | ((offset) << SWP_OFFSET_SHIFT) })
- #define __pte_to_swp_entry(pte) ((swp_entry_t) { (pte).pte_low })
- #define __swp_entry_to_pte(x) ((pte_t) { .pte = (x).val })
- #endif /* _ASM_X86_PGTABLE_2LEVEL_H */
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