extern void paging_init(void);
extern void clear_kernel_mapping(unsigned long addr, unsigned long size);
-/*
- * ZERO_PAGE is a global shared page that is always zero: used
- * for zero-mapped memory areas etc..
- */
-extern unsigned long empty_zero_page[PAGE_SIZE/sizeof(unsigned long)];
-#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
-
#endif /* !__ASSEMBLY__ */
+#define SHARED_KERNEL_PMD 1
+
/*
* PGDIR_SHIFT determines what a top-level page table entry can map
*/
#define pgd_none(x) (!pgd_val(x))
#define pud_none(x) (!pud_val(x))
-static inline void set_pte(pte_t *dst, pte_t val)
+struct mm_struct;
+
+static inline void native_pte_clear(struct mm_struct *mm, unsigned long addr,
+ pte_t *ptep)
{
- pte_val(*dst) = pte_val(val);
-}
-#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
+ *ptep = native_make_pte(0);
+}
-static inline void set_pmd(pmd_t *dst, pmd_t val)
+static inline void native_set_pte(pte_t *ptep, pte_t pte)
{
- *dst = val;
-}
+ *ptep = pte;
+}
-static inline void set_pud(pud_t *dst, pud_t val)
+static inline void native_set_pte_atomic(pte_t *ptep, pte_t pte)
{
- *dst = val;
+ native_set_pte(ptep, pte);
}
-static inline void pud_clear (pud_t *pud)
+static inline pte_t native_ptep_get_and_clear(pte_t *xp)
{
- set_pud(pud, __pud(0));
+#ifdef CONFIG_SMP
+ return native_make_pte(xchg(&xp->pte, 0));
+#else
+ /* native_local_ptep_get_and_clear, but duplicated because of cyclic dependency */
+ pte_t ret = *xp;
+ native_pte_clear(NULL, 0, xp);
+ return ret;
+#endif
}
-static inline void set_pgd(pgd_t *dst, pgd_t val)
+static inline void native_set_pmd(pmd_t *pmdp, pmd_t pmd)
{
- *dst = val;
-}
+ *pmdp = pmd;
+}
-static inline void pgd_clear (pgd_t * pgd)
+static inline void native_pmd_clear(pmd_t *pmd)
{
- set_pgd(pgd, __pgd(0));
+ native_set_pmd(pmd, native_make_pmd(0));
}
-#define ptep_get_and_clear(mm,addr,xp) __pte(xchg(&(xp)->pte, 0))
+static inline void native_set_pud(pud_t *pudp, pud_t pud)
+{
+ *pudp = pud;
+}
-struct mm_struct;
+static inline void native_pud_clear(pud_t *pud)
+{
+ native_set_pud(pud, native_make_pud(0));
+}
-static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, unsigned long addr, pte_t *ptep, int full)
+static inline void native_set_pgd(pgd_t *pgdp, pgd_t pgd)
{
- pte_t pte;
- if (full) {
- pte = *ptep;
- *ptep = __pte(0);
- } else {
- pte = ptep_get_and_clear(mm, addr, ptep);
- }
- return pte;
+ *pgdp = pgd;
}
-#define pte_same(a, b) ((a).pte == (b).pte)
+static inline void native_pgd_clear(pgd_t * pgd)
+{
+ native_set_pgd(pgd, native_make_pgd(0));
+}
-#define pte_pgprot(a) (__pgprot((a).pte & ~PHYSICAL_PAGE_MASK))
+#define pte_same(a, b) ((a).pte == (b).pte)
#endif /* !__ASSEMBLY__ */
#define pte_none(x) (!pte_val(x))
#define pte_present(x) (pte_val(x) & (_PAGE_PRESENT | _PAGE_PROTNONE))
-#define pte_clear(mm,addr,xp) do { set_pte_at(mm, addr, xp, __pte(0)); } while (0)
#define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT)) /* FIXME: is this right? */
#define pte_page(x) pfn_to_page(pte_pfn(x))
#define pte_pfn(x) ((pte_val(x) & __PHYSICAL_MASK) >> PAGE_SHIFT)
-struct vm_area_struct;
-
-static inline int ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
-{
- if (!pte_young(*ptep))
- return 0;
- return test_and_clear_bit(_PAGE_BIT_ACCESSED, &ptep->pte);
-}
-
-static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
-{
- clear_bit(_PAGE_BIT_RW, &ptep->pte);
-}
-
/*
* Macro to mark a page protection value as "uncacheable".
*/
pmd_index(address))
#define pmd_none(x) (!pmd_val(x))
#define pmd_present(x) (pmd_val(x) & _PAGE_PRESENT)
-#define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0)
#define pfn_pmd(nr,prot) (__pmd(((nr) << PAGE_SHIFT) | pgprot_val(prot)))
#define pmd_pfn(x) ((pmd_val(x) & __PHYSICAL_MASK) >> PAGE_SHIFT)
#define pte_to_pgoff(pte) ((pte_val(pte) & PHYSICAL_PAGE_MASK) >> PAGE_SHIFT)
-#define pgoff_to_pte(off) ((pte_t) { ((off) << PAGE_SHIFT) | _PAGE_FILE })
+#define pgoff_to_pte(off) ((pte_t) { .pte = ((off) << PAGE_SHIFT) | _PAGE_FILE })
#define PTE_FILE_MAX_BITS __PHYSICAL_MASK_SHIFT
/* PTE - Level 1 access. */
#define update_mmu_cache(vma,address,pte) do { } while (0)
-/* We only update the dirty/accessed state if we set
- * the dirty bit by hand in the kernel, since the hardware
- * will do the accessed bit for us, and we don't want to
- * race with other CPU's that might be updating the dirty
- * bit at the same time. */
-#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
-#define ptep_set_access_flags(__vma, __address, __ptep, __entry, __dirty) \
-({ \
- int __changed = !pte_same(*(__ptep), __entry); \
- if (__changed && __dirty) { \
- set_pte(__ptep, __entry); \
- flush_tlb_page(__vma, __address); \
- } \
- __changed; \
-})
-
/* Encode and de-code a swap entry */
#define __swp_type(x) (((x).val >> 1) & 0x3f)
#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_val(pte) })
-#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
+#define __swp_entry_to_pte(x) ((pte_t) { .pte = (x).val })
extern spinlock_t pgd_lock;
extern struct list_head pgd_list;
extern int kern_addr_valid(unsigned long addr);
-pte_t *lookup_address(unsigned long addr);
+pte_t *lookup_address(unsigned long addr, int *level);
#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
remap_pfn_range(vma, vaddr, pfn, size, prot)
#define kc_offset_to_vaddr(o) \
(((o) & (1UL << (__VIRTUAL_MASK_SHIFT-1))) ? ((o) | (~__VIRTUAL_MASK)) : (o))
-#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
-#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
-#define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
-#define __HAVE_ARCH_PTEP_SET_WRPROTECT
#define __HAVE_ARCH_PTE_SAME
-#include <asm-generic/pgtable.h>
#endif /* !__ASSEMBLY__ */
#endif /* _X86_64_PGTABLE_H */
git.samba.org / sfrench / cifs-2.6.git / blobdiff