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 #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))
43 void set_pte_vaddr_pud(pud_t *pud_page, unsigned long vaddr, pte_t new_pte);
46 static inline void native_pte_clear(struct mm_struct *mm, unsigned long addr,
49 *ptep = native_make_pte(0);
52 static inline void native_set_pte(pte_t *ptep, pte_t pte)
57 static inline void native_set_pte_atomic(pte_t *ptep, pte_t pte)
59 native_set_pte(ptep, pte);
62 static inline void native_set_pmd(pmd_t *pmdp, pmd_t pmd)
67 static inline void native_pmd_clear(pmd_t *pmd)
69 native_set_pmd(pmd, native_make_pmd(0));
72 static inline pte_t native_ptep_get_and_clear(pte_t *xp)
75 return native_make_pte(xchg(&xp->pte, 0));
77 /* native_local_ptep_get_and_clear,
78 but duplicated because of cyclic dependency */
80 native_pte_clear(NULL, 0, xp);
85 static inline pmd_t native_pmdp_get_and_clear(pmd_t *xp)
88 return native_make_pmd(xchg(&xp->pmd, 0));
90 /* native_local_pmdp_get_and_clear,
91 but duplicated because of cyclic dependency */
98 static inline void native_set_pud(pud_t *pudp, pud_t pud)
103 static inline void native_pud_clear(pud_t *pud)
105 native_set_pud(pud, native_make_pud(0));
109 extern pgd_t kaiser_set_shadow_pgd(pgd_t *pgdp, pgd_t pgd);
111 static inline pgd_t *native_get_shadow_pgd(pgd_t *pgdp)
113 return (pgd_t *)((unsigned long)pgdp | (unsigned long)PAGE_SIZE);
116 static inline pgd_t *native_get_normal_pgd(pgd_t *pgdp)
118 return (pgd_t *)((unsigned long)pgdp & ~(unsigned long)PAGE_SIZE);
121 static inline pgd_t kaiser_set_shadow_pgd(pgd_t *pgdp, pgd_t pgd)
125 static inline pgd_t *native_get_shadow_pgd(pgd_t *pgdp)
129 static inline pgd_t *native_get_normal_pgd(pgd_t *pgdp)
133 #endif /* CONFIG_KAISER */
135 static inline void native_set_pgd(pgd_t *pgdp, pgd_t pgd)
137 *pgdp = kaiser_set_shadow_pgd(pgdp, pgd);
140 static inline void native_pgd_clear(pgd_t *pgd)
142 native_set_pgd(pgd, native_make_pgd(0));
145 extern void sync_global_pgds(unsigned long start, unsigned long end);
148 * Conversion functions: convert a page and protection to a page entry,
149 * and a page entry and page directory to the page they refer to.
155 static inline int pgd_large(pgd_t pgd) { return 0; }
156 #define mk_kernel_pgd(address) __pgd((address) | _KERNPG_TABLE)
158 /* PUD - Level3 access */
160 /* PMD - Level 2 access */
161 #define pte_to_pgoff(pte) ((pte_val((pte)) & PHYSICAL_PAGE_MASK) >> PAGE_SHIFT)
162 #define pgoff_to_pte(off) ((pte_t) { .pte = ((off) << PAGE_SHIFT) | \
164 #define PTE_FILE_MAX_BITS __PHYSICAL_MASK_SHIFT
166 /* PTE - Level 1 access. */
168 /* x86-64 always has all page tables mapped. */
169 #define pte_offset_map(dir, address) pte_offset_kernel((dir), (address))
170 #define pte_unmap(pte) ((void)(pte))/* NOP */
172 #define update_mmu_cache(vma, address, ptep) do { } while (0)
174 /* Encode and de-code a swap entry */
175 #if _PAGE_BIT_FILE < _PAGE_BIT_PROTNONE
176 #define SWP_TYPE_BITS (_PAGE_BIT_FILE - _PAGE_BIT_PRESENT - 1)
177 #define SWP_OFFSET_SHIFT (_PAGE_BIT_PROTNONE + 1)
179 #define SWP_TYPE_BITS (_PAGE_BIT_PROTNONE - _PAGE_BIT_PRESENT - 1)
180 #define SWP_OFFSET_SHIFT (_PAGE_BIT_FILE + 1)
183 #define MAX_SWAPFILES_CHECK() BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > SWP_TYPE_BITS)
185 #define __swp_type(x) (((x).val >> (_PAGE_BIT_PRESENT + 1)) \
186 & ((1U << SWP_TYPE_BITS) - 1))
187 #define __swp_offset(x) ((x).val >> SWP_OFFSET_SHIFT)
188 #define __swp_entry(type, offset) ((swp_entry_t) { \
189 ((type) << (_PAGE_BIT_PRESENT + 1)) \
190 | ((offset) << SWP_OFFSET_SHIFT) })
191 #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val((pte)) })
192 #define __swp_entry_to_pte(x) ((pte_t) { .pte = (x).val })
194 extern int kern_addr_valid(unsigned long addr);
195 extern void cleanup_highmap(void);
197 #define HAVE_ARCH_UNMAPPED_AREA
198 #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
200 #define pgtable_cache_init() do { } while (0)
201 #define check_pgt_cache() do { } while (0)
203 #define PAGE_AGP PAGE_KERNEL_NOCACHE
204 #define HAVE_PAGE_AGP 1
206 /* fs/proc/kcore.c */
207 #define kc_vaddr_to_offset(v) ((v) & __VIRTUAL_MASK)
208 #define kc_offset_to_vaddr(o) ((o) | ~__VIRTUAL_MASK)
210 #define __HAVE_ARCH_PTE_SAME
212 #endif /* !__ASSEMBLY__ */
214 #endif /* _ASM_X86_PGTABLE_64_H */