H. Peter Anvin | 1965aae | 2008-10-22 22:26:29 -0700 | [diff] [blame] | 1 | #ifndef _ASM_X86_PGTABLE_H |
| 2 | #define _ASM_X86_PGTABLE_H |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 3 | |
Ingo Molnar | c47c1b1 | 2009-02-09 11:57:45 +0100 | [diff] [blame] | 4 | #include <asm/page.h> |
Suresh Siddha | 1adcaaf | 2009-08-17 13:23:50 -0700 | [diff] [blame] | 5 | #include <asm/e820.h> |
Ingo Molnar | c47c1b1 | 2009-02-09 11:57:45 +0100 | [diff] [blame] | 6 | |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 7 | #include <asm/pgtable_types.h> |
Suresh Siddha | b2bc273 | 2008-09-23 14:00:36 -0700 | [diff] [blame] | 8 | |
venkatesh.pallipadi@intel.com | 8a7b12f | 2008-12-18 11:41:31 -0800 | [diff] [blame] | 9 | /* |
| 10 | * Macro to mark a page protection value as UC- |
| 11 | */ |
| 12 | #define pgprot_noncached(prot) \ |
| 13 | ((boot_cpu_data.x86 > 3) \ |
| 14 | ? (__pgprot(pgprot_val(prot) | _PAGE_CACHE_UC_MINUS)) \ |
| 15 | : (prot)) |
| 16 | |
Jeremy Fitzhardinge | 4614139 | 2008-01-30 13:32:56 +0100 | [diff] [blame] | 17 | #ifndef __ASSEMBLY__ |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 18 | |
H. Peter Anvin | 55a6ca2 | 2009-11-23 15:12:07 -0800 | [diff] [blame] | 19 | #include <asm/x86_init.h> |
| 20 | |
Jeremy Fitzhardinge | 4614139 | 2008-01-30 13:32:56 +0100 | [diff] [blame] | 21 | /* |
Jeremy Fitzhardinge | 8405b12 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 22 | * ZERO_PAGE is a global shared page that is always zero: used |
| 23 | * for zero-mapped memory areas etc.. |
| 24 | */ |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 25 | extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]; |
Jeremy Fitzhardinge | 8405b12 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 26 | #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) |
| 27 | |
Jeremy Fitzhardinge | e3ed910 | 2008-01-30 13:34:11 +0100 | [diff] [blame] | 28 | extern spinlock_t pgd_lock; |
| 29 | extern struct list_head pgd_list; |
Jeremy Fitzhardinge | 8405b12 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 30 | |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 31 | #ifdef CONFIG_PARAVIRT |
| 32 | #include <asm/paravirt.h> |
| 33 | #else /* !CONFIG_PARAVIRT */ |
| 34 | #define set_pte(ptep, pte) native_set_pte(ptep, pte) |
| 35 | #define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte) |
| 36 | |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 37 | #define set_pte_atomic(ptep, pte) \ |
| 38 | native_set_pte_atomic(ptep, pte) |
| 39 | |
| 40 | #define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd) |
| 41 | |
| 42 | #ifndef __PAGETABLE_PUD_FOLDED |
| 43 | #define set_pgd(pgdp, pgd) native_set_pgd(pgdp, pgd) |
| 44 | #define pgd_clear(pgd) native_pgd_clear(pgd) |
| 45 | #endif |
| 46 | |
| 47 | #ifndef set_pud |
| 48 | # define set_pud(pudp, pud) native_set_pud(pudp, pud) |
| 49 | #endif |
| 50 | |
| 51 | #ifndef __PAGETABLE_PMD_FOLDED |
| 52 | #define pud_clear(pud) native_pud_clear(pud) |
| 53 | #endif |
| 54 | |
| 55 | #define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep) |
| 56 | #define pmd_clear(pmd) native_pmd_clear(pmd) |
| 57 | |
| 58 | #define pte_update(mm, addr, ptep) do { } while (0) |
| 59 | #define pte_update_defer(mm, addr, ptep) do { } while (0) |
| 60 | |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 61 | #define pgd_val(x) native_pgd_val(x) |
| 62 | #define __pgd(x) native_make_pgd(x) |
| 63 | |
| 64 | #ifndef __PAGETABLE_PUD_FOLDED |
| 65 | #define pud_val(x) native_pud_val(x) |
| 66 | #define __pud(x) native_make_pud(x) |
| 67 | #endif |
| 68 | |
| 69 | #ifndef __PAGETABLE_PMD_FOLDED |
| 70 | #define pmd_val(x) native_pmd_val(x) |
| 71 | #define __pmd(x) native_make_pmd(x) |
| 72 | #endif |
| 73 | |
| 74 | #define pte_val(x) native_pte_val(x) |
| 75 | #define __pte(x) native_make_pte(x) |
| 76 | |
Jeremy Fitzhardinge | 224101e | 2009-02-18 11:18:57 -0800 | [diff] [blame] | 77 | #define arch_end_context_switch(prev) do {} while(0) |
| 78 | |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 79 | #endif /* CONFIG_PARAVIRT */ |
| 80 | |
Jeremy Fitzhardinge | 8405b12 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 81 | /* |
Jeremy Fitzhardinge | 4614139 | 2008-01-30 13:32:56 +0100 | [diff] [blame] | 82 | * The following only work if pte_present() is true. |
| 83 | * Undefined behaviour if not.. |
| 84 | */ |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 85 | static inline int pte_dirty(pte_t pte) |
| 86 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 87 | return pte_flags(pte) & _PAGE_DIRTY; |
Jeremy Fitzhardinge | 4614139 | 2008-01-30 13:32:56 +0100 | [diff] [blame] | 88 | } |
| 89 | |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 90 | static inline int pte_young(pte_t pte) |
| 91 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 92 | return pte_flags(pte) & _PAGE_ACCESSED; |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 93 | } |
| 94 | |
| 95 | static inline int pte_write(pte_t pte) |
| 96 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 97 | return pte_flags(pte) & _PAGE_RW; |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 98 | } |
| 99 | |
| 100 | static inline int pte_file(pte_t pte) |
| 101 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 102 | return pte_flags(pte) & _PAGE_FILE; |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 103 | } |
| 104 | |
| 105 | static inline int pte_huge(pte_t pte) |
| 106 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 107 | return pte_flags(pte) & _PAGE_PSE; |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 108 | } |
| 109 | |
| 110 | static inline int pte_global(pte_t pte) |
| 111 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 112 | return pte_flags(pte) & _PAGE_GLOBAL; |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 113 | } |
| 114 | |
| 115 | static inline int pte_exec(pte_t pte) |
| 116 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 117 | return !(pte_flags(pte) & _PAGE_NX); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 118 | } |
| 119 | |
Nick Piggin | 7e67513 | 2008-04-28 02:13:00 -0700 | [diff] [blame] | 120 | static inline int pte_special(pte_t pte) |
| 121 | { |
Jan Beulich | 606ee44 | 2008-09-17 16:48:17 +0100 | [diff] [blame] | 122 | return pte_flags(pte) & _PAGE_SPECIAL; |
Nick Piggin | 7e67513 | 2008-04-28 02:13:00 -0700 | [diff] [blame] | 123 | } |
| 124 | |
Hugh Dickins | 91030ca | 2008-09-09 16:42:45 +0100 | [diff] [blame] | 125 | static inline unsigned long pte_pfn(pte_t pte) |
| 126 | { |
| 127 | return (pte_val(pte) & PTE_PFN_MASK) >> PAGE_SHIFT; |
| 128 | } |
| 129 | |
Akinobu Mita | 087975b | 2009-06-27 15:35:15 +0900 | [diff] [blame] | 130 | static inline unsigned long pmd_pfn(pmd_t pmd) |
| 131 | { |
| 132 | return (pmd_val(pmd) & PTE_PFN_MASK) >> PAGE_SHIFT; |
| 133 | } |
| 134 | |
Hugh Dickins | 91030ca | 2008-09-09 16:42:45 +0100 | [diff] [blame] | 135 | #define pte_page(pte) pfn_to_page(pte_pfn(pte)) |
| 136 | |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 137 | static inline int pmd_large(pmd_t pte) |
| 138 | { |
Jeremy Fitzhardinge | 18a7a199 | 2009-02-05 11:31:16 -0800 | [diff] [blame] | 139 | return (pmd_flags(pte) & (_PAGE_PSE | _PAGE_PRESENT)) == |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 140 | (_PAGE_PSE | _PAGE_PRESENT); |
| 141 | } |
| 142 | |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 143 | static inline pte_t pte_set_flags(pte_t pte, pteval_t set) |
| 144 | { |
| 145 | pteval_t v = native_pte_val(pte); |
| 146 | |
| 147 | return native_make_pte(v | set); |
| 148 | } |
| 149 | |
| 150 | static inline pte_t pte_clear_flags(pte_t pte, pteval_t clear) |
| 151 | { |
| 152 | pteval_t v = native_pte_val(pte); |
| 153 | |
| 154 | return native_make_pte(v & ~clear); |
| 155 | } |
| 156 | |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 157 | static inline pte_t pte_mkclean(pte_t pte) |
| 158 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 159 | return pte_clear_flags(pte, _PAGE_DIRTY); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 160 | } |
| 161 | |
| 162 | static inline pte_t pte_mkold(pte_t pte) |
| 163 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 164 | return pte_clear_flags(pte, _PAGE_ACCESSED); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 165 | } |
| 166 | |
| 167 | static inline pte_t pte_wrprotect(pte_t pte) |
| 168 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 169 | return pte_clear_flags(pte, _PAGE_RW); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 170 | } |
| 171 | |
| 172 | static inline pte_t pte_mkexec(pte_t pte) |
| 173 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 174 | return pte_clear_flags(pte, _PAGE_NX); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 175 | } |
| 176 | |
| 177 | static inline pte_t pte_mkdirty(pte_t pte) |
| 178 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 179 | return pte_set_flags(pte, _PAGE_DIRTY); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 180 | } |
| 181 | |
| 182 | static inline pte_t pte_mkyoung(pte_t pte) |
| 183 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 184 | return pte_set_flags(pte, _PAGE_ACCESSED); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 185 | } |
| 186 | |
| 187 | static inline pte_t pte_mkwrite(pte_t pte) |
| 188 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 189 | return pte_set_flags(pte, _PAGE_RW); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | static inline pte_t pte_mkhuge(pte_t pte) |
| 193 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 194 | return pte_set_flags(pte, _PAGE_PSE); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 195 | } |
| 196 | |
| 197 | static inline pte_t pte_clrhuge(pte_t pte) |
| 198 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 199 | return pte_clear_flags(pte, _PAGE_PSE); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 200 | } |
| 201 | |
| 202 | static inline pte_t pte_mkglobal(pte_t pte) |
| 203 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 204 | return pte_set_flags(pte, _PAGE_GLOBAL); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 205 | } |
| 206 | |
| 207 | static inline pte_t pte_clrglobal(pte_t pte) |
| 208 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 209 | return pte_clear_flags(pte, _PAGE_GLOBAL); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 210 | } |
Jeremy Fitzhardinge | 4614139 | 2008-01-30 13:32:56 +0100 | [diff] [blame] | 211 | |
Nick Piggin | 7e67513 | 2008-04-28 02:13:00 -0700 | [diff] [blame] | 212 | static inline pte_t pte_mkspecial(pte_t pte) |
| 213 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 214 | return pte_set_flags(pte, _PAGE_SPECIAL); |
Nick Piggin | 7e67513 | 2008-04-28 02:13:00 -0700 | [diff] [blame] | 215 | } |
| 216 | |
Jeremy Fitzhardinge | b534816 | 2009-02-04 18:33:38 -0800 | [diff] [blame] | 217 | /* |
| 218 | * Mask out unsupported bits in a present pgprot. Non-present pgprots |
| 219 | * can use those bits for other purposes, so leave them be. |
| 220 | */ |
| 221 | static inline pgprotval_t massage_pgprot(pgprot_t pgprot) |
| 222 | { |
| 223 | pgprotval_t protval = pgprot_val(pgprot); |
| 224 | |
| 225 | if (protval & _PAGE_PRESENT) |
| 226 | protval &= __supported_pte_mask; |
| 227 | |
| 228 | return protval; |
| 229 | } |
| 230 | |
Jeremy Fitzhardinge | 6fdc05d | 2008-01-30 13:32:57 +0100 | [diff] [blame] | 231 | static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot) |
| 232 | { |
Jeremy Fitzhardinge | b534816 | 2009-02-04 18:33:38 -0800 | [diff] [blame] | 233 | return __pte(((phys_addr_t)page_nr << PAGE_SHIFT) | |
| 234 | massage_pgprot(pgprot)); |
Jeremy Fitzhardinge | 6fdc05d | 2008-01-30 13:32:57 +0100 | [diff] [blame] | 235 | } |
| 236 | |
| 237 | static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot) |
| 238 | { |
Jeremy Fitzhardinge | b534816 | 2009-02-04 18:33:38 -0800 | [diff] [blame] | 239 | return __pmd(((phys_addr_t)page_nr << PAGE_SHIFT) | |
| 240 | massage_pgprot(pgprot)); |
Jeremy Fitzhardinge | 6fdc05d | 2008-01-30 13:32:57 +0100 | [diff] [blame] | 241 | } |
| 242 | |
Ingo Molnar | 3847231 | 2008-01-30 13:32:57 +0100 | [diff] [blame] | 243 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
| 244 | { |
| 245 | pteval_t val = pte_val(pte); |
| 246 | |
| 247 | /* |
| 248 | * Chop off the NX bit (if present), and add the NX portion of |
| 249 | * the newprot (if present): |
| 250 | */ |
Venki Pallipadi | 1c12c4c | 2008-05-14 16:05:51 -0700 | [diff] [blame] | 251 | val &= _PAGE_CHG_MASK; |
Jeremy Fitzhardinge | b534816 | 2009-02-04 18:33:38 -0800 | [diff] [blame] | 252 | val |= massage_pgprot(newprot) & ~_PAGE_CHG_MASK; |
Ingo Molnar | 3847231 | 2008-01-30 13:32:57 +0100 | [diff] [blame] | 253 | |
| 254 | return __pte(val); |
| 255 | } |
| 256 | |
Venki Pallipadi | 1c12c4c | 2008-05-14 16:05:51 -0700 | [diff] [blame] | 257 | /* mprotect needs to preserve PAT bits when updating vm_page_prot */ |
| 258 | #define pgprot_modify pgprot_modify |
| 259 | static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot) |
| 260 | { |
| 261 | pgprotval_t preservebits = pgprot_val(oldprot) & _PAGE_CHG_MASK; |
| 262 | pgprotval_t addbits = pgprot_val(newprot); |
| 263 | return __pgprot(preservebits | addbits); |
| 264 | } |
| 265 | |
Jeremy Fitzhardinge | 77be1fa | 2008-07-21 22:59:56 -0700 | [diff] [blame] | 266 | #define pte_pgprot(x) __pgprot(pte_flags(x) & PTE_FLAGS_MASK) |
Andi Kleen | c6ca18e | 2008-01-30 13:33:51 +0100 | [diff] [blame] | 267 | |
Jeremy Fitzhardinge | b534816 | 2009-02-04 18:33:38 -0800 | [diff] [blame] | 268 | #define canon_pgprot(p) __pgprot(massage_pgprot(p)) |
Andi Kleen | 1e8e23b | 2008-01-30 13:33:53 +0100 | [diff] [blame] | 269 | |
Suresh Siddha | 1adcaaf | 2009-08-17 13:23:50 -0700 | [diff] [blame] | 270 | static inline int is_new_memtype_allowed(u64 paddr, unsigned long size, |
| 271 | unsigned long flags, |
| 272 | unsigned long new_flags) |
venkatesh.pallipadi@intel.com | afc7d20 | 2009-01-09 16:13:10 -0800 | [diff] [blame] | 273 | { |
| 274 | /* |
H. Peter Anvin | 55a6ca2 | 2009-11-23 15:12:07 -0800 | [diff] [blame] | 275 | * PAT type is always WB for untracked ranges, so no need to check. |
Suresh Siddha | 1adcaaf | 2009-08-17 13:23:50 -0700 | [diff] [blame] | 276 | */ |
H. Peter Anvin | 8a27138 | 2009-11-23 14:49:20 -0800 | [diff] [blame] | 277 | if (x86_platform.is_untracked_pat_range(paddr, paddr + size)) |
Suresh Siddha | 1adcaaf | 2009-08-17 13:23:50 -0700 | [diff] [blame] | 278 | return 1; |
| 279 | |
| 280 | /* |
venkatesh.pallipadi@intel.com | afc7d20 | 2009-01-09 16:13:10 -0800 | [diff] [blame] | 281 | * Certain new memtypes are not allowed with certain |
| 282 | * requested memtype: |
| 283 | * - request is uncached, return cannot be write-back |
| 284 | * - request is write-combine, return cannot be write-back |
| 285 | */ |
| 286 | if ((flags == _PAGE_CACHE_UC_MINUS && |
| 287 | new_flags == _PAGE_CACHE_WB) || |
| 288 | (flags == _PAGE_CACHE_WC && |
| 289 | new_flags == _PAGE_CACHE_WB)) { |
| 290 | return 0; |
| 291 | } |
| 292 | |
| 293 | return 1; |
| 294 | } |
| 295 | |
Tejun Heo | 458a3e6 | 2009-02-24 11:57:21 +0900 | [diff] [blame] | 296 | pmd_t *populate_extra_pmd(unsigned long vaddr); |
| 297 | pte_t *populate_extra_pte(unsigned long vaddr); |
Jeremy Fitzhardinge | 4614139 | 2008-01-30 13:32:56 +0100 | [diff] [blame] | 298 | #endif /* __ASSEMBLY__ */ |
| 299 | |
Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 300 | #ifdef CONFIG_X86_32 |
| 301 | # include "pgtable_32.h" |
| 302 | #else |
| 303 | # include "pgtable_64.h" |
| 304 | #endif |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 305 | |
Jeremy Fitzhardinge | aca159d | 2009-02-05 11:30:54 -0800 | [diff] [blame] | 306 | #ifndef __ASSEMBLY__ |
Jeremy Fitzhardinge | f476961 | 2009-02-05 11:30:55 -0800 | [diff] [blame] | 307 | #include <linux/mm_types.h> |
Jeremy Fitzhardinge | aca159d | 2009-02-05 11:30:54 -0800 | [diff] [blame] | 308 | |
Jeremy Fitzhardinge | a034a01 | 2009-02-05 11:30:43 -0800 | [diff] [blame] | 309 | static inline int pte_none(pte_t pte) |
| 310 | { |
| 311 | return !pte.pte; |
| 312 | } |
| 313 | |
Jeremy Fitzhardinge | 8de01da | 2009-02-05 11:30:44 -0800 | [diff] [blame] | 314 | #define __HAVE_ARCH_PTE_SAME |
| 315 | static inline int pte_same(pte_t a, pte_t b) |
| 316 | { |
| 317 | return a.pte == b.pte; |
| 318 | } |
| 319 | |
Jeremy Fitzhardinge | 7c68385 | 2009-02-05 11:30:45 -0800 | [diff] [blame] | 320 | static inline int pte_present(pte_t a) |
| 321 | { |
| 322 | return pte_flags(a) & (_PAGE_PRESENT | _PAGE_PROTNONE); |
| 323 | } |
| 324 | |
Jeremy Fitzhardinge | eb63657 | 2009-02-06 13:05:56 -0800 | [diff] [blame] | 325 | static inline int pte_hidden(pte_t pte) |
Vegard Nossum | dfec072 | 2008-04-04 00:51:41 +0200 | [diff] [blame] | 326 | { |
Jeremy Fitzhardinge | eb63657 | 2009-02-06 13:05:56 -0800 | [diff] [blame] | 327 | return pte_flags(pte) & _PAGE_HIDDEN; |
Vegard Nossum | dfec072 | 2008-04-04 00:51:41 +0200 | [diff] [blame] | 328 | } |
| 329 | |
Jeremy Fitzhardinge | 649e8ef | 2009-02-05 11:30:50 -0800 | [diff] [blame] | 330 | static inline int pmd_present(pmd_t pmd) |
| 331 | { |
Jeremy Fitzhardinge | 18a7a199 | 2009-02-05 11:31:16 -0800 | [diff] [blame] | 332 | return pmd_flags(pmd) & _PAGE_PRESENT; |
Jeremy Fitzhardinge | 649e8ef | 2009-02-05 11:30:50 -0800 | [diff] [blame] | 333 | } |
| 334 | |
Jeremy Fitzhardinge | 4fea801 | 2009-02-05 11:30:51 -0800 | [diff] [blame] | 335 | static inline int pmd_none(pmd_t pmd) |
| 336 | { |
| 337 | /* Only check low word on 32-bit platforms, since it might be |
| 338 | out of sync with upper half. */ |
Jeremy Fitzhardinge | 26c8e31 | 2009-02-05 11:31:17 -0800 | [diff] [blame] | 339 | return (unsigned long)native_pmd_val(pmd) == 0; |
Jeremy Fitzhardinge | 4fea801 | 2009-02-05 11:30:51 -0800 | [diff] [blame] | 340 | } |
| 341 | |
Jeremy Fitzhardinge | 3ffb356 | 2009-02-05 11:30:59 -0800 | [diff] [blame] | 342 | static inline unsigned long pmd_page_vaddr(pmd_t pmd) |
| 343 | { |
| 344 | return (unsigned long)__va(pmd_val(pmd) & PTE_PFN_MASK); |
| 345 | } |
| 346 | |
Ingo Molnar | e5f7f20 | 2009-02-09 11:42:57 +0100 | [diff] [blame] | 347 | /* |
| 348 | * Currently stuck as a macro due to indirect forward reference to |
| 349 | * linux/mmzone.h's __section_mem_map_addr() definition: |
| 350 | */ |
| 351 | #define pmd_page(pmd) pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT) |
Jeremy Fitzhardinge | 20063ca | 2009-02-05 11:31:00 -0800 | [diff] [blame] | 352 | |
Jeremy Fitzhardinge | e24d7ee | 2009-02-05 11:31:01 -0800 | [diff] [blame] | 353 | /* |
| 354 | * the pmd page can be thought of an array like this: pmd_t[PTRS_PER_PMD] |
| 355 | * |
| 356 | * this macro returns the index of the entry in the pmd page which would |
| 357 | * control the given virtual address |
| 358 | */ |
Figo.zhang | ce0c0f9 | 2009-06-28 18:07:39 +0800 | [diff] [blame] | 359 | static inline unsigned long pmd_index(unsigned long address) |
Jeremy Fitzhardinge | e24d7ee | 2009-02-05 11:31:01 -0800 | [diff] [blame] | 360 | { |
| 361 | return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1); |
| 362 | } |
| 363 | |
Jeremy Fitzhardinge | 97e2817 | 2009-02-05 11:31:05 -0800 | [diff] [blame] | 364 | /* |
| 365 | * Conversion functions: convert a page and protection to a page entry, |
| 366 | * and a page entry and page directory to the page they refer to. |
| 367 | * |
| 368 | * (Currently stuck as a macro because of indirect forward reference |
| 369 | * to linux/mm.h:page_to_nid()) |
| 370 | */ |
| 371 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) |
| 372 | |
Jeremy Fitzhardinge | 346309c | 2009-02-05 11:31:06 -0800 | [diff] [blame] | 373 | /* |
| 374 | * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE] |
| 375 | * |
| 376 | * this function returns the index of the entry in the pte page which would |
| 377 | * control the given virtual address |
| 378 | */ |
Figo.zhang | ce0c0f9 | 2009-06-28 18:07:39 +0800 | [diff] [blame] | 379 | static inline unsigned long pte_index(unsigned long address) |
Jeremy Fitzhardinge | 346309c | 2009-02-05 11:31:06 -0800 | [diff] [blame] | 380 | { |
| 381 | return (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1); |
| 382 | } |
| 383 | |
Jeremy Fitzhardinge | 3fbc244 | 2009-02-05 11:31:07 -0800 | [diff] [blame] | 384 | static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address) |
| 385 | { |
| 386 | return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(address); |
| 387 | } |
| 388 | |
Jeremy Fitzhardinge | 9951023 | 2009-02-05 11:31:11 -0800 | [diff] [blame] | 389 | static inline int pmd_bad(pmd_t pmd) |
| 390 | { |
Jeremy Fitzhardinge | 18a7a199 | 2009-02-05 11:31:16 -0800 | [diff] [blame] | 391 | return (pmd_flags(pmd) & ~_PAGE_USER) != _KERNPG_TABLE; |
Jeremy Fitzhardinge | 9951023 | 2009-02-05 11:31:11 -0800 | [diff] [blame] | 392 | } |
| 393 | |
Jeremy Fitzhardinge | cc290ca | 2009-02-05 11:31:12 -0800 | [diff] [blame] | 394 | static inline unsigned long pages_to_mb(unsigned long npg) |
| 395 | { |
| 396 | return npg >> (20 - PAGE_SHIFT); |
| 397 | } |
| 398 | |
Jeremy Fitzhardinge | 6cf7150 | 2009-02-05 11:31:15 -0800 | [diff] [blame] | 399 | #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \ |
| 400 | remap_pfn_range(vma, vaddr, pfn, size, prot) |
| 401 | |
Jeremy Fitzhardinge | 5ba7c91 | 2009-02-05 11:30:48 -0800 | [diff] [blame] | 402 | #if PAGETABLE_LEVELS > 2 |
Jeremy Fitzhardinge | deb79cf | 2009-02-05 11:31:13 -0800 | [diff] [blame] | 403 | static inline int pud_none(pud_t pud) |
| 404 | { |
Jeremy Fitzhardinge | 26c8e31 | 2009-02-05 11:31:17 -0800 | [diff] [blame] | 405 | return native_pud_val(pud) == 0; |
Jeremy Fitzhardinge | deb79cf | 2009-02-05 11:31:13 -0800 | [diff] [blame] | 406 | } |
| 407 | |
Jeremy Fitzhardinge | 5ba7c91 | 2009-02-05 11:30:48 -0800 | [diff] [blame] | 408 | static inline int pud_present(pud_t pud) |
| 409 | { |
Jeremy Fitzhardinge | 18a7a199 | 2009-02-05 11:31:16 -0800 | [diff] [blame] | 410 | return pud_flags(pud) & _PAGE_PRESENT; |
Jeremy Fitzhardinge | 5ba7c91 | 2009-02-05 11:30:48 -0800 | [diff] [blame] | 411 | } |
Jeremy Fitzhardinge | 6fff47e | 2009-02-05 11:30:53 -0800 | [diff] [blame] | 412 | |
| 413 | static inline unsigned long pud_page_vaddr(pud_t pud) |
| 414 | { |
| 415 | return (unsigned long)__va((unsigned long)pud_val(pud) & PTE_PFN_MASK); |
| 416 | } |
Jeremy Fitzhardinge | f476961 | 2009-02-05 11:30:55 -0800 | [diff] [blame] | 417 | |
Ingo Molnar | e5f7f20 | 2009-02-09 11:42:57 +0100 | [diff] [blame] | 418 | /* |
| 419 | * Currently stuck as a macro due to indirect forward reference to |
| 420 | * linux/mmzone.h's __section_mem_map_addr() definition: |
| 421 | */ |
| 422 | #define pud_page(pud) pfn_to_page(pud_val(pud) >> PAGE_SHIFT) |
Jeremy Fitzhardinge | 01ade20 | 2009-02-05 11:31:02 -0800 | [diff] [blame] | 423 | |
| 424 | /* Find an entry in the second-level page table.. */ |
| 425 | static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address) |
| 426 | { |
| 427 | return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address); |
| 428 | } |
Jeremy Fitzhardinge | 3180fba | 2009-02-05 11:31:04 -0800 | [diff] [blame] | 429 | |
Jeremy Fitzhardinge | 3f6cbef | 2009-02-05 11:31:08 -0800 | [diff] [blame] | 430 | static inline int pud_large(pud_t pud) |
| 431 | { |
Jeremy Fitzhardinge | e2f5bda | 2009-02-09 00:09:52 -0800 | [diff] [blame] | 432 | return (pud_val(pud) & (_PAGE_PSE | _PAGE_PRESENT)) == |
Jeremy Fitzhardinge | 3f6cbef | 2009-02-05 11:31:08 -0800 | [diff] [blame] | 433 | (_PAGE_PSE | _PAGE_PRESENT); |
| 434 | } |
Jeremy Fitzhardinge | a61bb29 | 2009-02-05 11:31:10 -0800 | [diff] [blame] | 435 | |
| 436 | static inline int pud_bad(pud_t pud) |
| 437 | { |
Jeremy Fitzhardinge | 18a7a199 | 2009-02-05 11:31:16 -0800 | [diff] [blame] | 438 | return (pud_flags(pud) & ~(_KERNPG_TABLE | _PAGE_USER)) != 0; |
Jeremy Fitzhardinge | a61bb29 | 2009-02-05 11:31:10 -0800 | [diff] [blame] | 439 | } |
Jeremy Fitzhardinge | e2f5bda | 2009-02-09 00:09:52 -0800 | [diff] [blame] | 440 | #else |
| 441 | static inline int pud_large(pud_t pud) |
| 442 | { |
| 443 | return 0; |
| 444 | } |
Jeremy Fitzhardinge | 5ba7c91 | 2009-02-05 11:30:48 -0800 | [diff] [blame] | 445 | #endif /* PAGETABLE_LEVELS > 2 */ |
| 446 | |
Jeremy Fitzhardinge | 9f38d7e | 2009-02-05 11:30:49 -0800 | [diff] [blame] | 447 | #if PAGETABLE_LEVELS > 3 |
| 448 | static inline int pgd_present(pgd_t pgd) |
| 449 | { |
Jeremy Fitzhardinge | 18a7a199 | 2009-02-05 11:31:16 -0800 | [diff] [blame] | 450 | return pgd_flags(pgd) & _PAGE_PRESENT; |
Jeremy Fitzhardinge | 9f38d7e | 2009-02-05 11:30:49 -0800 | [diff] [blame] | 451 | } |
Jeremy Fitzhardinge | c5f040b | 2009-02-05 11:30:52 -0800 | [diff] [blame] | 452 | |
| 453 | static inline unsigned long pgd_page_vaddr(pgd_t pgd) |
| 454 | { |
| 455 | return (unsigned long)__va((unsigned long)pgd_val(pgd) & PTE_PFN_MASK); |
| 456 | } |
Jeremy Fitzhardinge | 777cba1 | 2009-02-05 11:30:56 -0800 | [diff] [blame] | 457 | |
Ingo Molnar | e5f7f20 | 2009-02-09 11:42:57 +0100 | [diff] [blame] | 458 | /* |
| 459 | * Currently stuck as a macro due to indirect forward reference to |
| 460 | * linux/mmzone.h's __section_mem_map_addr() definition: |
| 461 | */ |
| 462 | #define pgd_page(pgd) pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT) |
Jeremy Fitzhardinge | 7cfb810 | 2009-02-05 11:30:57 -0800 | [diff] [blame] | 463 | |
| 464 | /* to find an entry in a page-table-directory. */ |
Figo.zhang | ce0c0f9 | 2009-06-28 18:07:39 +0800 | [diff] [blame] | 465 | static inline unsigned long pud_index(unsigned long address) |
Jeremy Fitzhardinge | 7cfb810 | 2009-02-05 11:30:57 -0800 | [diff] [blame] | 466 | { |
| 467 | return (address >> PUD_SHIFT) & (PTRS_PER_PUD - 1); |
| 468 | } |
Jeremy Fitzhardinge | 3d081b1 | 2009-02-05 11:30:58 -0800 | [diff] [blame] | 469 | |
| 470 | static inline pud_t *pud_offset(pgd_t *pgd, unsigned long address) |
| 471 | { |
| 472 | return (pud_t *)pgd_page_vaddr(*pgd) + pud_index(address); |
| 473 | } |
Jeremy Fitzhardinge | 30f1031 | 2009-02-05 11:31:09 -0800 | [diff] [blame] | 474 | |
| 475 | static inline int pgd_bad(pgd_t pgd) |
| 476 | { |
Jeremy Fitzhardinge | 18a7a199 | 2009-02-05 11:31:16 -0800 | [diff] [blame] | 477 | return (pgd_flags(pgd) & ~_PAGE_USER) != _KERNPG_TABLE; |
Jeremy Fitzhardinge | 30f1031 | 2009-02-05 11:31:09 -0800 | [diff] [blame] | 478 | } |
Jeremy Fitzhardinge | 7325cc2 | 2009-02-05 11:31:14 -0800 | [diff] [blame] | 479 | |
| 480 | static inline int pgd_none(pgd_t pgd) |
| 481 | { |
Jeremy Fitzhardinge | 26c8e31 | 2009-02-05 11:31:17 -0800 | [diff] [blame] | 482 | return !native_pgd_val(pgd); |
Jeremy Fitzhardinge | 7325cc2 | 2009-02-05 11:31:14 -0800 | [diff] [blame] | 483 | } |
Jeremy Fitzhardinge | 9f38d7e | 2009-02-05 11:30:49 -0800 | [diff] [blame] | 484 | #endif /* PAGETABLE_LEVELS > 3 */ |
| 485 | |
Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 486 | #endif /* __ASSEMBLY__ */ |
| 487 | |
Jeremy Fitzhardinge | fb15a9b | 2008-06-25 00:19:06 -0400 | [diff] [blame] | 488 | /* |
| 489 | * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD] |
| 490 | * |
| 491 | * this macro returns the index of the entry in the pgd page which would |
| 492 | * control the given virtual address |
| 493 | */ |
| 494 | #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) |
| 495 | |
| 496 | /* |
| 497 | * pgd_offset() returns a (pgd_t *) |
| 498 | * pgd_index() is used get the offset into the pgd page's array of pgd_t's; |
| 499 | */ |
| 500 | #define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address))) |
| 501 | /* |
| 502 | * a shortcut which implies the use of the kernel's pgd, instead |
| 503 | * of a process's |
| 504 | */ |
| 505 | #define pgd_offset_k(address) pgd_offset(&init_mm, (address)) |
| 506 | |
| 507 | |
Jeremy Fitzhardinge | 68db065 | 2008-03-17 16:37:13 -0700 | [diff] [blame] | 508 | #define KERNEL_PGD_BOUNDARY pgd_index(PAGE_OFFSET) |
| 509 | #define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_BOUNDARY) |
| 510 | |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 511 | #ifndef __ASSEMBLY__ |
| 512 | |
Jaswinder Singh Rajput | 2c1b284 | 2009-04-11 00:03:10 +0530 | [diff] [blame] | 513 | extern int direct_gbpages; |
| 514 | |
Jeremy Fitzhardinge | 4891645 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 515 | /* local pte updates need not use xchg for locking */ |
| 516 | static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep) |
| 517 | { |
| 518 | pte_t res = *ptep; |
| 519 | |
| 520 | /* Pure native function needs no input for mm, addr */ |
| 521 | native_pte_clear(NULL, 0, ptep); |
| 522 | return res; |
| 523 | } |
| 524 | |
| 525 | static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr, |
| 526 | pte_t *ptep , pte_t pte) |
| 527 | { |
| 528 | native_set_pte(ptep, pte); |
| 529 | } |
| 530 | |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 531 | #ifndef CONFIG_PARAVIRT |
| 532 | /* |
| 533 | * Rules for using pte_update - it must be called after any PTE update which |
| 534 | * has not been done using the set_pte / clear_pte interfaces. It is used by |
| 535 | * shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE |
| 536 | * updates should either be sets, clears, or set_pte_atomic for P->P |
| 537 | * transitions, which means this hook should only be called for user PTEs. |
| 538 | * This hook implies a P->P protection or access change has taken place, which |
| 539 | * requires a subsequent TLB flush. The notification can optionally be delayed |
| 540 | * until the TLB flush event by using the pte_update_defer form of the |
| 541 | * interface, but care must be taken to assure that the flush happens while |
| 542 | * still holding the same page table lock so that the shadow and primary pages |
| 543 | * do not become out of sync on SMP. |
| 544 | */ |
| 545 | #define pte_update(mm, addr, ptep) do { } while (0) |
| 546 | #define pte_update_defer(mm, addr, ptep) do { } while (0) |
| 547 | #endif |
| 548 | |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 549 | /* |
| 550 | * We only update the dirty/accessed state if we set |
| 551 | * the dirty bit by hand in the kernel, since the hardware |
| 552 | * will do the accessed bit for us, and we don't want to |
| 553 | * race with other CPU's that might be updating the dirty |
| 554 | * bit at the same time. |
| 555 | */ |
Jeremy Fitzhardinge | bea4180 | 2008-06-25 00:18:57 -0400 | [diff] [blame] | 556 | struct vm_area_struct; |
| 557 | |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 558 | #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS |
Jeremy Fitzhardinge | ee5aa8d | 2008-03-17 16:37:03 -0700 | [diff] [blame] | 559 | extern int ptep_set_access_flags(struct vm_area_struct *vma, |
| 560 | unsigned long address, pte_t *ptep, |
| 561 | pte_t entry, int dirty); |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 562 | |
| 563 | #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG |
Jeremy Fitzhardinge | f9fbf1a | 2008-03-17 16:37:04 -0700 | [diff] [blame] | 564 | extern int ptep_test_and_clear_young(struct vm_area_struct *vma, |
| 565 | unsigned long addr, pte_t *ptep); |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 566 | |
| 567 | #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH |
Jeremy Fitzhardinge | c20311e | 2008-03-17 16:37:05 -0700 | [diff] [blame] | 568 | extern int ptep_clear_flush_young(struct vm_area_struct *vma, |
| 569 | unsigned long address, pte_t *ptep); |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 570 | |
| 571 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 572 | static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, |
| 573 | pte_t *ptep) |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 574 | { |
| 575 | pte_t pte = native_ptep_get_and_clear(ptep); |
| 576 | pte_update(mm, addr, ptep); |
| 577 | return pte; |
| 578 | } |
| 579 | |
| 580 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 581 | static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, |
| 582 | unsigned long addr, pte_t *ptep, |
| 583 | int full) |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 584 | { |
| 585 | pte_t pte; |
| 586 | if (full) { |
| 587 | /* |
| 588 | * Full address destruction in progress; paravirt does not |
| 589 | * care about updates and native needs no locking |
| 590 | */ |
| 591 | pte = native_local_ptep_get_and_clear(ptep); |
| 592 | } else { |
| 593 | pte = ptep_get_and_clear(mm, addr, ptep); |
| 594 | } |
| 595 | return pte; |
| 596 | } |
| 597 | |
| 598 | #define __HAVE_ARCH_PTEP_SET_WRPROTECT |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 599 | static inline void ptep_set_wrprotect(struct mm_struct *mm, |
| 600 | unsigned long addr, pte_t *ptep) |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 601 | { |
Jeremy Fitzhardinge | d8d8982 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 602 | clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte); |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 603 | pte_update(mm, addr, ptep); |
| 604 | } |
| 605 | |
Jeremy Fitzhardinge | 85958b4 | 2008-03-17 16:37:14 -0700 | [diff] [blame] | 606 | /* |
| 607 | * clone_pgd_range(pgd_t *dst, pgd_t *src, int count); |
| 608 | * |
| 609 | * dst - pointer to pgd range anwhere on a pgd page |
| 610 | * src - "" |
| 611 | * count - the number of pgds to copy. |
| 612 | * |
| 613 | * dst and src can be on the same page, but the range must not overlap, |
| 614 | * and must not cross a page boundary. |
| 615 | */ |
| 616 | static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count) |
| 617 | { |
| 618 | memcpy(dst, src, count * sizeof(pgd_t)); |
| 619 | } |
| 620 | |
| 621 | |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 622 | #include <asm-generic/pgtable.h> |
| 623 | #endif /* __ASSEMBLY__ */ |
| 624 | |
H. Peter Anvin | 1965aae | 2008-10-22 22:26:29 -0700 | [diff] [blame] | 625 | #endif /* _ASM_X86_PGTABLE_H */ |