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 pte_t level1_fixmap_pgt[512];
23 extern pgd_t init_level4_pgt[];
25 #define swapper_pg_dir init_level4_pgt
27 extern void paging_init(void);
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))
44 void set_pte_vaddr_pud(pud_t *pud_page, unsigned long vaddr, pte_t new_pte);
47 static inline void native_pte_clear(struct mm_struct *mm, unsigned long addr,
50 *ptep = native_make_pte(0);
53 static inline void native_set_pte(pte_t *ptep, pte_t pte)
58 static inline void native_set_pte_atomic(pte_t *ptep, pte_t pte)
60 native_set_pte(ptep, pte);
63 static inline void native_set_pmd(pmd_t *pmdp, pmd_t pmd)
68 static inline void native_pmd_clear(pmd_t *pmd)
70 native_set_pmd(pmd, native_make_pmd(0));
73 static inline pte_t native_ptep_get_and_clear(pte_t *xp)
76 return native_make_pte(xchg(&xp->pte, 0));
78 /* native_local_ptep_get_and_clear,
79 but duplicated because of cyclic dependency */
81 native_pte_clear(NULL, 0, xp);
86 static inline pmd_t native_pmdp_get_and_clear(pmd_t *xp)
89 return native_make_pmd(xchg(&xp->pmd, 0));
91 /* native_local_pmdp_get_and_clear,
92 but duplicated because of cyclic dependency */
99 static inline void native_set_pud(pud_t *pudp, pud_t pud)
104 static inline void native_pud_clear(pud_t *pud)
106 native_set_pud(pud, native_make_pud(0));
110 extern pgd_t kaiser_set_shadow_pgd(pgd_t *pgdp, pgd_t pgd);
112 static inline pgd_t *native_get_shadow_pgd(pgd_t *pgdp)
114 #ifdef CONFIG_DEBUG_VM
115 /* linux/mmdebug.h may not have been included at this point */
116 BUG_ON(!kaiser_enabled);
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)
130 #endif /* CONFIG_KAISER */
132 static inline void native_set_pgd(pgd_t *pgdp, pgd_t pgd)
134 *pgdp = kaiser_set_shadow_pgd(pgdp, pgd);
137 static inline void native_pgd_clear(pgd_t *pgd)
139 native_set_pgd(pgd, native_make_pgd(0));
142 extern void sync_global_pgds(unsigned long start, unsigned long end,
146 * Conversion functions: convert a page and protection to a page entry,
147 * and a page entry and page directory to the page they refer to.
153 static inline int pgd_large(pgd_t pgd) { return 0; }
154 #define mk_kernel_pgd(address) __pgd((address) | _KERNPG_TABLE)
156 /* PUD - Level3 access */
158 /* PMD - Level 2 access */
160 /* PTE - Level 1 access. */
162 /* x86-64 always has all page tables mapped. */
163 #define pte_offset_map(dir, address) pte_offset_kernel((dir), (address))
164 #define pte_unmap(pte) ((void)(pte))/* NOP */
167 * Encode and de-code a swap entry
169 * | ... | 11| 10| 9|8|7|6|5| 4| 3|2|1|0| <- bit number
170 * | ... |SW3|SW2|SW1|G|L|D|A|CD|WT|U|W|P| <- bit names
171 * | OFFSET (14->63) | TYPE (9-13) |0|X|X|X| X| X|X|X|0| <- swp entry
173 * G (8) is aliased and used as a PROT_NONE indicator for
174 * !present ptes. We need to start storing swap entries above
175 * there. We also need to avoid using A and D because of an
176 * erratum where they can be incorrectly set by hardware on
179 #define SWP_TYPE_FIRST_BIT (_PAGE_BIT_PROTNONE + 1)
180 #define SWP_TYPE_BITS 5
181 /* Place the offset above the type: */
182 #define SWP_OFFSET_FIRST_BIT (SWP_TYPE_FIRST_BIT + SWP_TYPE_BITS)
184 #define MAX_SWAPFILES_CHECK() BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > SWP_TYPE_BITS)
186 #define __swp_type(x) (((x).val >> (SWP_TYPE_FIRST_BIT)) \
187 & ((1U << SWP_TYPE_BITS) - 1))
188 #define __swp_offset(x) ((x).val >> SWP_OFFSET_FIRST_BIT)
189 #define __swp_entry(type, offset) ((swp_entry_t) { \
190 ((type) << (SWP_TYPE_FIRST_BIT)) \
191 | ((offset) << SWP_OFFSET_FIRST_BIT) })
192 #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val((pte)) })
193 #define __swp_entry_to_pte(x) ((pte_t) { .pte = (x).val })
195 extern int kern_addr_valid(unsigned long addr);
196 extern void cleanup_highmap(void);
198 #define HAVE_ARCH_UNMAPPED_AREA
199 #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
201 #define pgtable_cache_init() do { } while (0)
202 #define check_pgt_cache() do { } while (0)
204 #define PAGE_AGP PAGE_KERNEL_NOCACHE
205 #define HAVE_PAGE_AGP 1
207 /* fs/proc/kcore.c */
208 #define kc_vaddr_to_offset(v) ((v) & __VIRTUAL_MASK)
209 #define kc_offset_to_vaddr(o) ((o) | ~__VIRTUAL_MASK)
211 #define __HAVE_ARCH_PTE_SAME
213 #define vmemmap ((struct page *)VMEMMAP_START)
215 extern void init_extra_mapping_uc(unsigned long phys, unsigned long size);
216 extern void init_extra_mapping_wb(unsigned long phys, unsigned long size);
218 #endif /* !__ASSEMBLY__ */
220 #endif /* _ASM_X86_PGTABLE_64_H */