x86: unify pmd_page_vaddr

[pandora-kernel.git] / arch / x86 / include / asm / pgtable_64.h

diff --git a/arch/x86/include/asm/pgtable_64.h b/arch/x86/include/asm/pgtable_64.h
index 545a0e0..7a510e8 100644 (file)
--- a/arch/x86/include/asm/pgtable_64.h
+++ b/arch/x86/include/asm/pgtable_64.h
@@ -134,8 +134,6 @@ static inline void native_pgd_clear(pgd_t *pgd)
        native_set_pgd(pgd, native_make_pgd(0));
 }
 
-#define pte_same(a, b)         ((a).pte == (b).pte)
-
 #endif /* !__ASSEMBLY__ */
 
 #define PMD_SIZE       (_AC(1, UL) << PMD_SHIFT)
@@ -146,7 +144,7 @@ static inline void native_pgd_clear(pgd_t *pgd)
 #define PGDIR_MASK     (~(PGDIR_SIZE - 1))
 
 
-#define MAXMEM          _AC(0x00003fffffffffff, UL)
+#define MAXMEM          _AC(__AC(1, UL) << MAX_PHYSMEM_BITS, UL)
 #define VMALLOC_START    _AC(0xffffc20000000000, UL)
 #define VMALLOC_END      _AC(0xffffe1ffffffffff, UL)
 #define VMEMMAP_START   _AC(0xffffe20000000000, UL)
@@ -171,17 +169,8 @@ static inline int pmd_bad(pmd_t pmd)
        return (pmd_val(pmd) & ~(PTE_PFN_MASK | _PAGE_USER)) != _KERNPG_TABLE;
 }
 
-#define pte_none(x)    (!pte_val((x)))
-#define pte_present(x) (pte_val((x)) & (_PAGE_PRESENT | _PAGE_PROTNONE))
-
 #define pages_to_mb(x) ((x) >> (20 - PAGE_SHIFT))   /* FIXME: is this right? */
 
-/*
- * Macro to mark a page protection value as "uncacheable".
- */
-#define pgprot_noncached(prot)                                 \
-       (__pgprot(pgprot_val((prot)) | _PAGE_PCD | _PAGE_PWT))
-
 /*
  * Conversion functions: convert a page and protection to a page entry,
  * and a page entry and page directory to the page they refer to.
@@ -190,22 +179,10 @@ static inline int pmd_bad(pmd_t pmd)
 /*
  * Level 4 access.
  */
-#define pgd_page_vaddr(pgd)                                            \
-       ((unsigned long)__va((unsigned long)pgd_val((pgd)) & PTE_PFN_MASK))
-#define pgd_page(pgd)          (pfn_to_page(pgd_val((pgd)) >> PAGE_SHIFT))
-#define pgd_present(pgd) (pgd_val(pgd) & _PAGE_PRESENT)
 static inline int pgd_large(pgd_t pgd) { return 0; }
 #define mk_kernel_pgd(address) __pgd((address) | _KERNPG_TABLE)
 
 /* PUD - Level3 access */
-/* to find an entry in a page-table-directory. */
-#define pud_page_vaddr(pud)                                            \
-       ((unsigned long)__va(pud_val((pud)) & PHYSICAL_PAGE_MASK))
-#define pud_page(pud)  (pfn_to_page(pud_val((pud)) >> PAGE_SHIFT))
-#define pud_index(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD - 1))
-#define pud_offset(pgd, address)                                       \
-       ((pud_t *)pgd_page_vaddr(*(pgd)) + pud_index((address)))
-#define pud_present(pud) (pud_val((pud)) & _PAGE_PRESENT)
 
 static inline int pud_large(pud_t pte)
 {
@@ -214,14 +191,11 @@ static inline int pud_large(pud_t pte)
 }
 
 /* PMD  - Level 2 access */
-#define pmd_page_vaddr(pmd) ((unsigned long) __va(pmd_val((pmd)) & PTE_PFN_MASK))
 #define pmd_page(pmd)          (pfn_to_page(pmd_val((pmd)) >> PAGE_SHIFT))
 
 #define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD - 1))
 #define pmd_offset(dir, address) ((pmd_t *)pud_page_vaddr(*(dir)) + \
                                  pmd_index(address))
-#define pmd_none(x)    (!pmd_val((x)))
-#define pmd_present(x) (pmd_val((x)) & _PAGE_PRESENT)
 #define pfn_pmd(nr, prot) (__pmd(((nr) << PAGE_SHIFT) | pgprot_val((prot))))
 #define pmd_pfn(x)  ((pmd_val((x)) & __PHYSICAL_MASK) >> PAGE_SHIFT)
 
@@ -250,10 +224,22 @@ static inline int pud_large(pud_t pte)
 extern int direct_gbpages;
 
 /* 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) })
+#if _PAGE_BIT_FILE < _PAGE_BIT_PROTNONE
+#define SWP_TYPE_BITS (_PAGE_BIT_FILE - _PAGE_BIT_PRESENT - 1)
+#define SWP_OFFSET_SHIFT (_PAGE_BIT_PROTNONE + 1)
+#else
+#define SWP_TYPE_BITS (_PAGE_BIT_PROTNONE - _PAGE_BIT_PRESENT - 1)
+#define SWP_OFFSET_SHIFT (_PAGE_BIT_FILE + 1)
+#endif
+
+#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_val((pte)) })
 #define __swp_entry_to_pte(x)          ((pte_t) { .pte = (x).val })