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