1 #ifndef _ASM_X86_PGTABLE_64_H
2 #define _ASM_X86_PGTABLE_64_H
4 #include <linux/const.h>
5 #include <asm/pgtable_64_types.h>
10 * This file contains the functions and defines necessary to modify and use
11 * the x86-64 page table tree.
13 #include <asm/processor.h>
14 #include <linux/bitops.h>
15 #include <linux/threads.h>
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[];
24 #define swapper_pg_dir init_level4_pgt
26 extern void paging_init(void);
28 #endif /* !__ASSEMBLY__ */
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))
47 void set_pte_vaddr_pud(pud_t *pud_page, unsigned long vaddr, pte_t new_pte);
50 static inline void native_pte_clear(struct mm_struct *mm, unsigned long addr,
53 *ptep = native_make_pte(0);
56 static inline void native_set_pte(pte_t *ptep, pte_t pte)
61 static inline void native_set_pte_atomic(pte_t *ptep, pte_t pte)
63 native_set_pte(ptep, pte);
66 static inline pte_t native_ptep_get_and_clear(pte_t *xp)
69 return native_make_pte(xchg(&xp->pte, 0));
71 /* native_local_ptep_get_and_clear,
72 but duplicated because of cyclic dependency */
74 native_pte_clear(NULL, 0, xp);
79 static inline void native_set_pmd(pmd_t *pmdp, pmd_t pmd)
84 static inline void native_pmd_clear(pmd_t *pmd)
86 native_set_pmd(pmd, native_make_pmd(0));
89 static inline void native_set_pud(pud_t *pudp, pud_t pud)
94 static inline void native_pud_clear(pud_t *pud)
96 native_set_pud(pud, native_make_pud(0));
99 static inline void native_set_pgd(pgd_t *pgdp, pgd_t pgd)
104 static inline void native_pgd_clear(pgd_t *pgd)
106 native_set_pgd(pgd, native_make_pgd(0));
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.
117 static inline int pgd_large(pgd_t pgd) { return 0; }
118 #define mk_kernel_pgd(address) __pgd((address) | _KERNPG_TABLE)
120 /* PUD - Level3 access */
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) | \
126 #define PTE_FILE_MAX_BITS __PHYSICAL_MASK_SHIFT
128 /* PTE - Level 1 access. */
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 */
136 #define update_mmu_cache(vma, address, pte) do { } while (0)
138 extern int direct_gbpages;
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)
145 #define SWP_TYPE_BITS (_PAGE_BIT_PROTNONE - _PAGE_BIT_PRESENT - 1)
146 #define SWP_OFFSET_SHIFT (_PAGE_BIT_FILE + 1)
149 #define MAX_SWAPFILES_CHECK() BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > SWP_TYPE_BITS)
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 })
160 extern int kern_addr_valid(unsigned long addr);
161 extern void cleanup_highmap(void);
163 #define HAVE_ARCH_UNMAPPED_AREA
164 #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
166 #define pgtable_cache_init() do { } while (0)
167 #define check_pgt_cache() do { } while (0)
169 #define PAGE_AGP PAGE_KERNEL_NOCACHE
170 #define HAVE_PAGE_AGP 1
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) \
179 #define __HAVE_ARCH_PTE_SAME
180 #endif /* !__ASSEMBLY__ */
182 #endif /* _ASM_X86_PGTABLE_64_H */