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 17extern pud_t level3_kernel_pgt[512]; 18extern pud_t level3_ident_pgt[512]; 19extern pmd_t level2_kernel_pgt[512]; 20extern pmd_t level2_fixmap_pgt[512]; 21extern pmd_t level2_ident_pgt[512]; 22extern pgd_t init_level4_pgt[]; 23 24#define swapper_pg_dir init_level4_pgt 25 26extern 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 41struct mm_struct; 42 43void set_pte_vaddr_pud(pud_t *pud_page, unsigned long vaddr, pte_t new_pte); 44 45 46static 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 52static inline void native_set_pte(pte_t *ptep, pte_t pte) 53{ 54 *ptep = pte; 55} 56 57static inline void native_set_pte_atomic(pte_t *ptep, pte_t pte) 58{ 59 native_set_pte(ptep, pte); 60} 61 62static inline void native_set_pmd(pmd_t *pmdp, pmd_t pmd) 63{ 64 *pmdp = pmd; 65} 66 67static inline void native_pmd_clear(pmd_t *pmd) 68{ 69 native_set_pmd(pmd, native_make_pmd(0)); 70} 71 72static inline pte_t native_ptep_get_and_clear(pte_t *xp) 73{ 74#ifdef CONFIG_SMP 75 return native_make_pte(xchg(&xp->pte, 0)); 76#else 77 /* native_local_ptep_get_and_clear, 78 but duplicated because of cyclic dependency */ 79 pte_t ret = *xp; 80 native_pte_clear(NULL, 0, xp); 81 return ret; 82#endif 83} 84 85static inline pmd_t native_pmdp_get_and_clear(pmd_t *xp) 86{ 87#ifdef CONFIG_SMP 88 return native_make_pmd(xchg(&xp->pmd, 0)); 89#else 90 /* native_local_pmdp_get_and_clear, 91 but duplicated because of cyclic dependency */ 92 pmd_t ret = *xp; 93 native_pmd_clear(xp); 94 return ret; 95#endif 96} 97 98static inline void native_set_pud(pud_t *pudp, pud_t pud) 99{ 100 *pudp = pud; 101} 102 103static inline void native_pud_clear(pud_t *pud) 104{ 105 native_set_pud(pud, native_make_pud(0)); 106} 107 108static inline void native_set_pgd(pgd_t *pgdp, pgd_t pgd) 109{ 110 *pgdp = pgd; 111} 112 113static inline void native_pgd_clear(pgd_t *pgd) 114{ 115 native_set_pgd(pgd, native_make_pgd(0)); 116} 117 118extern void sync_global_pgds(unsigned long start, unsigned long end); 119 120/* 121 * Conversion functions: convert a page and protection to a page entry, 122 * and a page entry and page directory to the page they refer to. 123 */ 124 125/* 126 * Level 4 access. 127 */ 128static inline int pgd_large(pgd_t pgd) { return 0; } 129#define mk_kernel_pgd(address) __pgd((address) | _KERNPG_TABLE) 130 131/* PUD - Level3 access */ 132 133/* PMD - Level 2 access */ 134#define pte_to_pgoff(pte) ((pte_val((pte)) & PHYSICAL_PAGE_MASK) >> PAGE_SHIFT) 135#define pgoff_to_pte(off) ((pte_t) { .pte = ((off) << PAGE_SHIFT) | \ 136 _PAGE_FILE }) 137#define PTE_FILE_MAX_BITS __PHYSICAL_MASK_SHIFT 138 139/* PTE - Level 1 access. */ 140 141/* x86-64 always has all page tables mapped. */ 142#define pte_offset_map(dir, address) pte_offset_kernel((dir), (address)) 143#define pte_unmap(pte) ((void)(pte))/* NOP */ 144 145#define update_mmu_cache(vma, address, ptep) do { } while (0) 146 147/* Encode and de-code a swap entry */ 148#if _PAGE_BIT_FILE < _PAGE_BIT_PROTNONE 149#define SWP_TYPE_BITS (_PAGE_BIT_FILE - _PAGE_BIT_PRESENT - 1) 150#define SWP_OFFSET_SHIFT (_PAGE_BIT_PROTNONE + 1) 151#else 152#define SWP_TYPE_BITS (_PAGE_BIT_PROTNONE - _PAGE_BIT_PRESENT - 1) 153#define SWP_OFFSET_SHIFT (_PAGE_BIT_FILE + 1) 154#endif 155 156#define MAX_SWAPFILES_CHECK() BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > SWP_TYPE_BITS) 157 158#define __swp_type(x) (((x).val >> (_PAGE_BIT_PRESENT + 1)) \ 159 & ((1U << SWP_TYPE_BITS) - 1)) 160#define __swp_offset(x) ((x).val >> SWP_OFFSET_SHIFT) 161#define __swp_entry(type, offset) ((swp_entry_t) { \ 162 ((type) << (_PAGE_BIT_PRESENT + 1)) \ 163 | ((offset) << SWP_OFFSET_SHIFT) }) 164#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val((pte)) }) 165#define __swp_entry_to_pte(x) ((pte_t) { .pte = (x).val }) 166 167extern int kern_addr_valid(unsigned long addr); 168extern void cleanup_highmap(void); 169 170#define HAVE_ARCH_UNMAPPED_AREA 171#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN 172 173#define pgtable_cache_init() do { } while (0) 174#define check_pgt_cache() do { } while (0) 175 176#define PAGE_AGP PAGE_KERNEL_NOCACHE 177#define HAVE_PAGE_AGP 1 178 179/* fs/proc/kcore.c */ 180#define kc_vaddr_to_offset(v) ((v) & __VIRTUAL_MASK) 181#define kc_offset_to_vaddr(o) ((o) | ~__VIRTUAL_MASK) 182 183#define __HAVE_ARCH_PTE_SAME 184 185#endif /* !__ASSEMBLY__ */ 186 187#endif /* _ASM_X86_PGTABLE_64_H */ 188