1 #ifndef _ASM_X86_PGTABLE_64_H 2 #define _ASM_X86_PGTABLE_64_H 3 4 #include <linux/const.h> 5 #include <asm/pgtable_64_types.h> 6 7 #ifndef __ASSEMBLY__ 8 9 /* 10 * This file contains the functions and defines necessary to modify and use 11 * the x86-64 page table tree. 12 */ 13 #include <asm/processor.h> 14 #include <linux/bitops.h> 15 #include <linux/threads.h> 16 17 extern pud_t level3_kernel_pgt[512]; 18 extern pud_t level3_ident_pgt[512]; 19 extern pmd_t level2_kernel_pgt[512]; 20 extern pmd_t level2_fixmap_pgt[512]; 21 extern pmd_t level2_ident_pgt[512]; 22 extern pgd_t init_level4_pgt[]; 23 24 #define swapper_pg_dir init_level4_pgt 25 26 extern void paging_init(void); 27 28 #endif /* !__ASSEMBLY__ */ 29 30 #ifndef __ASSEMBLY__ 31 32 #define pte_ERROR(e) \ 33 printk("%s:%d: bad pte %p(%016lx).\n", \ 34 __FILE__, __LINE__, &(e), pte_val(e)) 35 #define pmd_ERROR(e) \ 36 printk("%s:%d: bad pmd %p(%016lx).\n", \ 37 __FILE__, __LINE__, &(e), pmd_val(e)) 38 #define pud_ERROR(e) \ 39 printk("%s:%d: bad pud %p(%016lx).\n", \ 40 __FILE__, __LINE__, &(e), pud_val(e)) 41 #define pgd_ERROR(e) \ 42 printk("%s:%d: bad pgd %p(%016lx).\n", \ 43 __FILE__, __LINE__, &(e), pgd_val(e)) 44 45 struct mm_struct; 46 47 void set_pte_vaddr_pud(pud_t *pud_page, unsigned long vaddr, pte_t new_pte); 48 49 50 static inline void native_pte_clear(struct mm_struct *mm, unsigned long addr, 51 pte_t *ptep) 52 { 53 *ptep = native_make_pte(0); 54 } 55 56 static inline void native_set_pte(pte_t *ptep, pte_t pte) 57 { 58 *ptep = pte; 59 } 60 61 static inline void native_set_pte_atomic(pte_t *ptep, pte_t pte) 62 { 63 native_set_pte(ptep, pte); 64 } 65 66 static inline pte_t native_ptep_get_and_clear(pte_t *xp) 67 { 68 #ifdef CONFIG_SMP 69 return native_make_pte(xchg(&xp->pte, 0)); 70 #else 71 /* native_local_ptep_get_and_clear, 72 but duplicated because of cyclic dependency */ 73 pte_t ret = *xp; 74 native_pte_clear(NULL, 0, xp); 75 return ret; 76 #endif 77 } 78 79 static inline void native_set_pmd(pmd_t *pmdp, pmd_t pmd) 80 { 81 *pmdp = pmd; 82 } 83 84 static inline void native_pmd_clear(pmd_t *pmd) 85 { 86 native_set_pmd(pmd, native_make_pmd(0)); 87 } 88 89 static inline void native_set_pud(pud_t *pudp, pud_t pud) 90 { 91 *pudp = pud; 92 } 93 94 static inline void native_pud_clear(pud_t *pud) 95 { 96 native_set_pud(pud, native_make_pud(0)); 97 } 98 99 static inline void native_set_pgd(pgd_t *pgdp, pgd_t pgd) 100 { 101 *pgdp = pgd; 102 } 103 104 static inline void native_pgd_clear(pgd_t *pgd) 105 { 106 native_set_pgd(pgd, native_make_pgd(0)); 107 } 108 109 /* 110 * Conversion functions: convert a page and protection to a page entry, 111 * and a page entry and page directory to the page they refer to. 112 */ 113 114 /* 115 * Level 4 access. 116 */ 117 static inline int pgd_large(pgd_t pgd) { return 0; } 118 #define mk_kernel_pgd(address) __pgd((address) | _KERNPG_TABLE) 119 120 /* PUD - Level3 access */ 121 122 /* PMD - Level 2 access */ 123 #define pte_to_pgoff(pte) ((pte_val((pte)) & PHYSICAL_PAGE_MASK) >> PAGE_SHIFT) 124 #define pgoff_to_pte(off) ((pte_t) { .pte = ((off) << PAGE_SHIFT) | \ 125 _PAGE_FILE }) 126 #define PTE_FILE_MAX_BITS __PHYSICAL_MASK_SHIFT 127 128 /* PTE - Level 1 access. */ 129 130 /* x86-64 always has all page tables mapped. */ 131 #define pte_offset_map(dir, address) pte_offset_kernel((dir), (address)) 132 #define pte_offset_map_nested(dir, address) pte_offset_kernel((dir), (address)) 133 #define pte_unmap(pte) /* NOP */ 134 #define pte_unmap_nested(pte) /* NOP */ 135 136 #define update_mmu_cache(vma, address, pte) do { } while (0) 137 138 extern int direct_gbpages; 139 140 /* Encode and de-code a swap entry */ 141 #if _PAGE_BIT_FILE < _PAGE_BIT_PROTNONE 142 #define SWP_TYPE_BITS (_PAGE_BIT_FILE - _PAGE_BIT_PRESENT - 1) 143 #define SWP_OFFSET_SHIFT (_PAGE_BIT_PROTNONE + 1) 144 #else 145 #define SWP_TYPE_BITS (_PAGE_BIT_PROTNONE - _PAGE_BIT_PRESENT - 1) 146 #define SWP_OFFSET_SHIFT (_PAGE_BIT_FILE + 1) 147 #endif 148 149 #define MAX_SWAPFILES_CHECK() BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > SWP_TYPE_BITS) 150 151 #define __swp_type(x) (((x).val >> (_PAGE_BIT_PRESENT + 1)) \ 152 & ((1U << SWP_TYPE_BITS) - 1)) 153 #define __swp_offset(x) ((x).val >> SWP_OFFSET_SHIFT) 154 #define __swp_entry(type, offset) ((swp_entry_t) { \ 155 ((type) << (_PAGE_BIT_PRESENT + 1)) \ 156 | ((offset) << SWP_OFFSET_SHIFT) }) 157 #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val((pte)) }) 158 #define __swp_entry_to_pte(x) ((pte_t) { .pte = (x).val }) 159 160 extern int kern_addr_valid(unsigned long addr); 161 extern void cleanup_highmap(void); 162 163 #define HAVE_ARCH_UNMAPPED_AREA 164 #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN 165 166 #define pgtable_cache_init() do { } while (0) 167 #define check_pgt_cache() do { } while (0) 168 169 #define PAGE_AGP PAGE_KERNEL_NOCACHE 170 #define HAVE_PAGE_AGP 1 171 172 /* fs/proc/kcore.c */ 173 #define kc_vaddr_to_offset(v) ((v) & __VIRTUAL_MASK) 174 #define kc_offset_to_vaddr(o) \ 175 (((o) & (1UL << (__VIRTUAL_MASK_SHIFT - 1))) \ 176 ? ((o) | ~__VIRTUAL_MASK) \ 177 : (o)) 178 179 #define __HAVE_ARCH_PTE_SAME 180 #endif /* !__ASSEMBLY__ */ 181 182 #endif /* _ASM_X86_PGTABLE_64_H */ 183