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 pte_t level1_fixmap_pgt[512]; 23extern pgd_t init_level4_pgt[]; 24 25#define swapper_pg_dir init_level4_pgt 26 27extern void paging_init(void); 28 29#define pte_ERROR(e) \ 30 pr_err("%s:%d: bad pte %p(%016lx)\n", \ 31 __FILE__, __LINE__, &(e), pte_val(e)) 32#define pmd_ERROR(e) \ 33 pr_err("%s:%d: bad pmd %p(%016lx)\n", \ 34 __FILE__, __LINE__, &(e), pmd_val(e)) 35#define pud_ERROR(e) \ 36 pr_err("%s:%d: bad pud %p(%016lx)\n", \ 37 __FILE__, __LINE__, &(e), pud_val(e)) 38#define pgd_ERROR(e) \ 39 pr_err("%s:%d: bad pgd %p(%016lx)\n", \ 40 __FILE__, __LINE__, &(e), pgd_val(e)) 41 42struct mm_struct; 43 44void set_pte_vaddr_pud(pud_t *pud_page, unsigned long vaddr, pte_t new_pte); 45 46 47static inline void native_pte_clear(struct mm_struct *mm, unsigned long addr, 48 pte_t *ptep) 49{ 50 *ptep = native_make_pte(0); 51} 52 53static inline void native_set_pte(pte_t *ptep, pte_t pte) 54{ 55 *ptep = pte; 56} 57 58static inline void native_set_pte_atomic(pte_t *ptep, pte_t pte) 59{ 60 native_set_pte(ptep, pte); 61} 62 63static inline void native_set_pmd(pmd_t *pmdp, pmd_t pmd) 64{ 65 *pmdp = pmd; 66} 67 68static inline void native_pmd_clear(pmd_t *pmd) 69{ 70 native_set_pmd(pmd, native_make_pmd(0)); 71} 72 73static inline pte_t native_ptep_get_and_clear(pte_t *xp) 74{ 75#ifdef CONFIG_SMP 76 return native_make_pte(xchg(&xp->pte, 0)); 77#else 78 /* native_local_ptep_get_and_clear, 79 but duplicated because of cyclic dependency */ 80 pte_t ret = *xp; 81 native_pte_clear(NULL, 0, xp); 82 return ret; 83#endif 84} 85 86static inline pmd_t native_pmdp_get_and_clear(pmd_t *xp) 87{ 88#ifdef CONFIG_SMP 89 return native_make_pmd(xchg(&xp->pmd, 0)); 90#else 91 /* native_local_pmdp_get_and_clear, 92 but duplicated because of cyclic dependency */ 93 pmd_t ret = *xp; 94 native_pmd_clear(xp); 95 return ret; 96#endif 97} 98 99static inline void native_set_pud(pud_t *pudp, pud_t pud) 100{ 101 *pudp = pud; 102} 103 104static inline void native_pud_clear(pud_t *pud) 105{ 106 native_set_pud(pud, native_make_pud(0)); 107} 108 109static inline void native_set_pgd(pgd_t *pgdp, pgd_t pgd) 110{ 111 *pgdp = pgd; 112} 113 114static inline void native_pgd_clear(pgd_t *pgd) 115{ 116 native_set_pgd(pgd, native_make_pgd(0)); 117} 118 119extern void sync_global_pgds(unsigned long start, unsigned long end, 120 int removed); 121 122/* 123 * Conversion functions: convert a page and protection to a page entry, 124 * and a page entry and page directory to the page they refer to. 125 */ 126 127/* 128 * Level 4 access. 129 */ 130static inline int pgd_large(pgd_t pgd) { return 0; } 131#define mk_kernel_pgd(address) __pgd((address) | _KERNPG_TABLE) 132 133/* PUD - Level3 access */ 134 135/* PMD - Level 2 access */ 136 137/* PTE - Level 1 access. */ 138 139/* x86-64 always has all page tables mapped. */ 140#define pte_offset_map(dir, address) pte_offset_kernel((dir), (address)) 141#define pte_unmap(pte) ((void)(pte))/* NOP */ 142 143/* Encode and de-code a swap entry */ 144#define SWP_TYPE_BITS 5 145#define SWP_OFFSET_SHIFT (_PAGE_BIT_PROTNONE + 1) 146 147#define MAX_SWAPFILES_CHECK() BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > SWP_TYPE_BITS) 148 149#define __swp_type(x) (((x).val >> (_PAGE_BIT_PRESENT + 1)) \ 150 & ((1U << SWP_TYPE_BITS) - 1)) 151#define __swp_offset(x) ((x).val >> SWP_OFFSET_SHIFT) 152#define __swp_entry(type, offset) ((swp_entry_t) { \ 153 ((type) << (_PAGE_BIT_PRESENT + 1)) \ 154 | ((offset) << SWP_OFFSET_SHIFT) }) 155#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val((pte)) }) 156#define __swp_entry_to_pte(x) ((pte_t) { .pte = (x).val }) 157 158extern int kern_addr_valid(unsigned long addr); 159extern void cleanup_highmap(void); 160 161#define HAVE_ARCH_UNMAPPED_AREA 162#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN 163 164#define pgtable_cache_init() do { } while (0) 165#define check_pgt_cache() do { } while (0) 166 167#define PAGE_AGP PAGE_KERNEL_NOCACHE 168#define HAVE_PAGE_AGP 1 169 170/* fs/proc/kcore.c */ 171#define kc_vaddr_to_offset(v) ((v) & __VIRTUAL_MASK) 172#define kc_offset_to_vaddr(o) ((o) | ~__VIRTUAL_MASK) 173 174#define __HAVE_ARCH_PTE_SAME 175 176#define vmemmap ((struct page *)VMEMMAP_START) 177 178extern void init_extra_mapping_uc(unsigned long phys, unsigned long size); 179extern void init_extra_mapping_wb(unsigned long phys, unsigned long size); 180 181#endif /* !__ASSEMBLY__ */ 182 183#endif /* _ASM_X86_PGTABLE_64_H */ 184