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
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[];
23
24 #define swapper_pg_dir init_level4_pgt
25
26 extern 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
41 struct mm_struct;
42
43 void set_pte_vaddr_pud(pud_t *pud_page, unsigned long vaddr, pte_t new_pte);
44
45
native_pte_clear(struct mm_struct * mm,unsigned long addr,pte_t * ptep)46 static 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
native_set_pte(pte_t * ptep,pte_t pte)52 static inline void native_set_pte(pte_t *ptep, pte_t pte)
53 {
54 *ptep = pte;
55 }
56
native_set_pte_atomic(pte_t * ptep,pte_t pte)57 static inline void native_set_pte_atomic(pte_t *ptep, pte_t pte)
58 {
59 native_set_pte(ptep, pte);
60 }
61
native_set_pmd(pmd_t * pmdp,pmd_t pmd)62 static inline void native_set_pmd(pmd_t *pmdp, pmd_t pmd)
63 {
64 *pmdp = pmd;
65 }
66
native_pmd_clear(pmd_t * pmd)67 static inline void native_pmd_clear(pmd_t *pmd)
68 {
69 native_set_pmd(pmd, native_make_pmd(0));
70 }
71
native_ptep_get_and_clear(pte_t * xp)72 static 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
native_pmdp_get_and_clear(pmd_t * xp)85 static 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
native_set_pud(pud_t * pudp,pud_t pud)98 static inline void native_set_pud(pud_t *pudp, pud_t pud)
99 {
100 *pudp = pud;
101 }
102
native_pud_clear(pud_t * pud)103 static inline void native_pud_clear(pud_t *pud)
104 {
105 native_set_pud(pud, native_make_pud(0));
106 }
107
native_set_pgd(pgd_t * pgdp,pgd_t pgd)108 static inline void native_set_pgd(pgd_t *pgdp, pgd_t pgd)
109 {
110 *pgdp = pgd;
111 }
112
native_pgd_clear(pgd_t * pgd)113 static inline void native_pgd_clear(pgd_t *pgd)
114 {
115 native_set_pgd(pgd, native_make_pgd(0));
116 }
117
118 extern 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 */
pgd_large(pgd_t pgd)128 static 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
167 extern int kern_addr_valid(unsigned long addr);
168 extern 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