Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 1 | #ifndef _ASM_X86_PGTABLE_DEFS_H |
| 2 | #define _ASM_X86_PGTABLE_DEFS_H |
| 3 | |
| 4 | #include <linux/const.h> |
Ingo Molnar | e43623b | 2009-02-13 13:24:19 +0100 | [diff] [blame] | 5 | #include <asm/page_types.h> |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 6 | |
| 7 | #define FIRST_USER_ADDRESS 0 |
| 8 | |
| 9 | #define _PAGE_BIT_PRESENT 0 /* is present */ |
| 10 | #define _PAGE_BIT_RW 1 /* writeable */ |
| 11 | #define _PAGE_BIT_USER 2 /* userspace addressable */ |
| 12 | #define _PAGE_BIT_PWT 3 /* page write through */ |
| 13 | #define _PAGE_BIT_PCD 4 /* page cache disabled */ |
| 14 | #define _PAGE_BIT_ACCESSED 5 /* was accessed (raised by CPU) */ |
| 15 | #define _PAGE_BIT_DIRTY 6 /* was written to (raised by CPU) */ |
| 16 | #define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */ |
| 17 | #define _PAGE_BIT_PAT 7 /* on 4KB pages */ |
| 18 | #define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */ |
| 19 | #define _PAGE_BIT_UNUSED1 9 /* available for programmer */ |
| 20 | #define _PAGE_BIT_IOMAP 10 /* flag used to indicate IO mapping */ |
| 21 | #define _PAGE_BIT_UNUSED3 11 |
| 22 | #define _PAGE_BIT_PAT_LARGE 12 /* On 2MB or 1GB pages */ |
| 23 | #define _PAGE_BIT_SPECIAL _PAGE_BIT_UNUSED1 |
| 24 | #define _PAGE_BIT_CPA_TEST _PAGE_BIT_UNUSED1 |
| 25 | #define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */ |
| 26 | |
| 27 | /* If _PAGE_BIT_PRESENT is clear, we use these: */ |
| 28 | /* - if the user mapped it with PROT_NONE; pte_present gives true */ |
| 29 | #define _PAGE_BIT_PROTNONE _PAGE_BIT_GLOBAL |
| 30 | /* - set: nonlinear file mapping, saved PTE; unset:swap */ |
| 31 | #define _PAGE_BIT_FILE _PAGE_BIT_DIRTY |
| 32 | |
| 33 | #define _PAGE_PRESENT (_AT(pteval_t, 1) << _PAGE_BIT_PRESENT) |
| 34 | #define _PAGE_RW (_AT(pteval_t, 1) << _PAGE_BIT_RW) |
| 35 | #define _PAGE_USER (_AT(pteval_t, 1) << _PAGE_BIT_USER) |
| 36 | #define _PAGE_PWT (_AT(pteval_t, 1) << _PAGE_BIT_PWT) |
| 37 | #define _PAGE_PCD (_AT(pteval_t, 1) << _PAGE_BIT_PCD) |
| 38 | #define _PAGE_ACCESSED (_AT(pteval_t, 1) << _PAGE_BIT_ACCESSED) |
| 39 | #define _PAGE_DIRTY (_AT(pteval_t, 1) << _PAGE_BIT_DIRTY) |
| 40 | #define _PAGE_PSE (_AT(pteval_t, 1) << _PAGE_BIT_PSE) |
| 41 | #define _PAGE_GLOBAL (_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL) |
| 42 | #define _PAGE_UNUSED1 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED1) |
| 43 | #define _PAGE_IOMAP (_AT(pteval_t, 1) << _PAGE_BIT_IOMAP) |
| 44 | #define _PAGE_UNUSED3 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED3) |
| 45 | #define _PAGE_PAT (_AT(pteval_t, 1) << _PAGE_BIT_PAT) |
| 46 | #define _PAGE_PAT_LARGE (_AT(pteval_t, 1) << _PAGE_BIT_PAT_LARGE) |
| 47 | #define _PAGE_SPECIAL (_AT(pteval_t, 1) << _PAGE_BIT_SPECIAL) |
| 48 | #define _PAGE_CPA_TEST (_AT(pteval_t, 1) << _PAGE_BIT_CPA_TEST) |
| 49 | #define __HAVE_ARCH_PTE_SPECIAL |
| 50 | |
| 51 | #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE) |
| 52 | #define _PAGE_NX (_AT(pteval_t, 1) << _PAGE_BIT_NX) |
| 53 | #else |
| 54 | #define _PAGE_NX (_AT(pteval_t, 0)) |
| 55 | #endif |
| 56 | |
| 57 | #define _PAGE_FILE (_AT(pteval_t, 1) << _PAGE_BIT_FILE) |
| 58 | #define _PAGE_PROTNONE (_AT(pteval_t, 1) << _PAGE_BIT_PROTNONE) |
| 59 | |
| 60 | #define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \ |
| 61 | _PAGE_ACCESSED | _PAGE_DIRTY) |
| 62 | #define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | \ |
| 63 | _PAGE_DIRTY) |
| 64 | |
| 65 | /* Set of bits not changed in pte_modify */ |
| 66 | #define _PAGE_CHG_MASK (PTE_PFN_MASK | _PAGE_PCD | _PAGE_PWT | \ |
| 67 | _PAGE_SPECIAL | _PAGE_ACCESSED | _PAGE_DIRTY) |
| 68 | |
| 69 | #define _PAGE_CACHE_MASK (_PAGE_PCD | _PAGE_PWT) |
| 70 | #define _PAGE_CACHE_WB (0) |
| 71 | #define _PAGE_CACHE_WC (_PAGE_PWT) |
| 72 | #define _PAGE_CACHE_UC_MINUS (_PAGE_PCD) |
| 73 | #define _PAGE_CACHE_UC (_PAGE_PCD | _PAGE_PWT) |
| 74 | |
| 75 | #define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED) |
| 76 | #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \ |
| 77 | _PAGE_ACCESSED | _PAGE_NX) |
| 78 | |
| 79 | #define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | \ |
| 80 | _PAGE_USER | _PAGE_ACCESSED) |
| 81 | #define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \ |
| 82 | _PAGE_ACCESSED | _PAGE_NX) |
| 83 | #define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \ |
| 84 | _PAGE_ACCESSED) |
| 85 | #define PAGE_COPY PAGE_COPY_NOEXEC |
| 86 | #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | \ |
| 87 | _PAGE_ACCESSED | _PAGE_NX) |
| 88 | #define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \ |
| 89 | _PAGE_ACCESSED) |
| 90 | |
| 91 | #define __PAGE_KERNEL_EXEC \ |
| 92 | (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_GLOBAL) |
| 93 | #define __PAGE_KERNEL (__PAGE_KERNEL_EXEC | _PAGE_NX) |
| 94 | |
| 95 | #define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW) |
| 96 | #define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW) |
| 97 | #define __PAGE_KERNEL_EXEC_NOCACHE (__PAGE_KERNEL_EXEC | _PAGE_PCD | _PAGE_PWT) |
| 98 | #define __PAGE_KERNEL_WC (__PAGE_KERNEL | _PAGE_CACHE_WC) |
| 99 | #define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_PCD | _PAGE_PWT) |
| 100 | #define __PAGE_KERNEL_UC_MINUS (__PAGE_KERNEL | _PAGE_PCD) |
| 101 | #define __PAGE_KERNEL_VSYSCALL (__PAGE_KERNEL_RX | _PAGE_USER) |
| 102 | #define __PAGE_KERNEL_VSYSCALL_NOCACHE (__PAGE_KERNEL_VSYSCALL | _PAGE_PCD | _PAGE_PWT) |
| 103 | #define __PAGE_KERNEL_LARGE (__PAGE_KERNEL | _PAGE_PSE) |
| 104 | #define __PAGE_KERNEL_LARGE_NOCACHE (__PAGE_KERNEL | _PAGE_CACHE_UC | _PAGE_PSE) |
| 105 | #define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE) |
| 106 | |
| 107 | #define __PAGE_KERNEL_IO (__PAGE_KERNEL | _PAGE_IOMAP) |
| 108 | #define __PAGE_KERNEL_IO_NOCACHE (__PAGE_KERNEL_NOCACHE | _PAGE_IOMAP) |
| 109 | #define __PAGE_KERNEL_IO_UC_MINUS (__PAGE_KERNEL_UC_MINUS | _PAGE_IOMAP) |
| 110 | #define __PAGE_KERNEL_IO_WC (__PAGE_KERNEL_WC | _PAGE_IOMAP) |
| 111 | |
| 112 | #define PAGE_KERNEL __pgprot(__PAGE_KERNEL) |
| 113 | #define PAGE_KERNEL_RO __pgprot(__PAGE_KERNEL_RO) |
| 114 | #define PAGE_KERNEL_EXEC __pgprot(__PAGE_KERNEL_EXEC) |
| 115 | #define PAGE_KERNEL_RX __pgprot(__PAGE_KERNEL_RX) |
| 116 | #define PAGE_KERNEL_WC __pgprot(__PAGE_KERNEL_WC) |
| 117 | #define PAGE_KERNEL_NOCACHE __pgprot(__PAGE_KERNEL_NOCACHE) |
| 118 | #define PAGE_KERNEL_UC_MINUS __pgprot(__PAGE_KERNEL_UC_MINUS) |
| 119 | #define PAGE_KERNEL_EXEC_NOCACHE __pgprot(__PAGE_KERNEL_EXEC_NOCACHE) |
| 120 | #define PAGE_KERNEL_LARGE __pgprot(__PAGE_KERNEL_LARGE) |
| 121 | #define PAGE_KERNEL_LARGE_NOCACHE __pgprot(__PAGE_KERNEL_LARGE_NOCACHE) |
| 122 | #define PAGE_KERNEL_LARGE_EXEC __pgprot(__PAGE_KERNEL_LARGE_EXEC) |
| 123 | #define PAGE_KERNEL_VSYSCALL __pgprot(__PAGE_KERNEL_VSYSCALL) |
| 124 | #define PAGE_KERNEL_VSYSCALL_NOCACHE __pgprot(__PAGE_KERNEL_VSYSCALL_NOCACHE) |
| 125 | |
| 126 | #define PAGE_KERNEL_IO __pgprot(__PAGE_KERNEL_IO) |
| 127 | #define PAGE_KERNEL_IO_NOCACHE __pgprot(__PAGE_KERNEL_IO_NOCACHE) |
| 128 | #define PAGE_KERNEL_IO_UC_MINUS __pgprot(__PAGE_KERNEL_IO_UC_MINUS) |
| 129 | #define PAGE_KERNEL_IO_WC __pgprot(__PAGE_KERNEL_IO_WC) |
| 130 | |
| 131 | /* xwr */ |
| 132 | #define __P000 PAGE_NONE |
| 133 | #define __P001 PAGE_READONLY |
| 134 | #define __P010 PAGE_COPY |
| 135 | #define __P011 PAGE_COPY |
| 136 | #define __P100 PAGE_READONLY_EXEC |
| 137 | #define __P101 PAGE_READONLY_EXEC |
| 138 | #define __P110 PAGE_COPY_EXEC |
| 139 | #define __P111 PAGE_COPY_EXEC |
| 140 | |
| 141 | #define __S000 PAGE_NONE |
| 142 | #define __S001 PAGE_READONLY |
| 143 | #define __S010 PAGE_SHARED |
| 144 | #define __S011 PAGE_SHARED |
| 145 | #define __S100 PAGE_READONLY_EXEC |
| 146 | #define __S101 PAGE_READONLY_EXEC |
| 147 | #define __S110 PAGE_SHARED_EXEC |
| 148 | #define __S111 PAGE_SHARED_EXEC |
| 149 | |
| 150 | /* |
| 151 | * early identity mapping pte attrib macros. |
| 152 | */ |
| 153 | #ifdef CONFIG_X86_64 |
| 154 | #define __PAGE_KERNEL_IDENT_LARGE_EXEC __PAGE_KERNEL_LARGE_EXEC |
| 155 | #else |
| 156 | /* |
| 157 | * For PDE_IDENT_ATTR include USER bit. As the PDE and PTE protection |
| 158 | * bits are combined, this will alow user to access the high address mapped |
| 159 | * VDSO in the presence of CONFIG_COMPAT_VDSO |
| 160 | */ |
| 161 | #define PTE_IDENT_ATTR 0x003 /* PRESENT+RW */ |
| 162 | #define PDE_IDENT_ATTR 0x067 /* PRESENT+RW+USER+DIRTY+ACCESSED */ |
| 163 | #define PGD_IDENT_ATTR 0x001 /* PRESENT (no other attributes) */ |
| 164 | #endif |
| 165 | |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 166 | #ifdef CONFIG_X86_32 |
| 167 | # include "pgtable_32_types.h" |
| 168 | #else |
| 169 | # include "pgtable_64_types.h" |
| 170 | #endif |
| 171 | |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 172 | #ifndef __ASSEMBLY__ |
| 173 | |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 174 | #include <linux/types.h> |
| 175 | |
Jeremy Fitzhardinge | 9b3651c | 2009-02-13 11:01:54 -0800 | [diff] [blame] | 176 | /* PTE_PFN_MASK extracts the PFN from a (pte|pmd|pud|pgd)val_t */ |
| 177 | #define PTE_PFN_MASK ((pteval_t)PHYSICAL_PAGE_MASK) |
| 178 | |
| 179 | /* PTE_FLAGS_MASK extracts the flags from a (pte|pmd|pud|pgd)val_t */ |
| 180 | #define PTE_FLAGS_MASK (~PTE_PFN_MASK) |
| 181 | |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 182 | typedef struct pgprot { pgprotval_t pgprot; } pgprot_t; |
| 183 | |
| 184 | typedef struct { pgdval_t pgd; } pgd_t; |
| 185 | |
| 186 | static inline pgd_t native_make_pgd(pgdval_t val) |
| 187 | { |
| 188 | return (pgd_t) { val }; |
| 189 | } |
| 190 | |
| 191 | static inline pgdval_t native_pgd_val(pgd_t pgd) |
| 192 | { |
| 193 | return pgd.pgd; |
| 194 | } |
| 195 | |
| 196 | static inline pgdval_t pgd_flags(pgd_t pgd) |
| 197 | { |
| 198 | return native_pgd_val(pgd) & PTE_FLAGS_MASK; |
| 199 | } |
| 200 | |
| 201 | #if PAGETABLE_LEVELS > 3 |
| 202 | typedef struct { pudval_t pud; } pud_t; |
| 203 | |
| 204 | static inline pud_t native_make_pud(pmdval_t val) |
| 205 | { |
| 206 | return (pud_t) { val }; |
| 207 | } |
| 208 | |
| 209 | static inline pudval_t native_pud_val(pud_t pud) |
| 210 | { |
| 211 | return pud.pud; |
| 212 | } |
| 213 | #else |
| 214 | #include <asm-generic/pgtable-nopud.h> |
| 215 | |
| 216 | static inline pudval_t native_pud_val(pud_t pud) |
| 217 | { |
| 218 | return native_pgd_val(pud.pgd); |
| 219 | } |
| 220 | #endif |
| 221 | |
| 222 | #if PAGETABLE_LEVELS > 2 |
| 223 | typedef struct { pmdval_t pmd; } pmd_t; |
| 224 | |
| 225 | static inline pmd_t native_make_pmd(pmdval_t val) |
| 226 | { |
| 227 | return (pmd_t) { val }; |
| 228 | } |
| 229 | |
| 230 | static inline pmdval_t native_pmd_val(pmd_t pmd) |
| 231 | { |
| 232 | return pmd.pmd; |
| 233 | } |
| 234 | #else |
| 235 | #include <asm-generic/pgtable-nopmd.h> |
| 236 | |
| 237 | static inline pmdval_t native_pmd_val(pmd_t pmd) |
| 238 | { |
| 239 | return native_pgd_val(pmd.pud.pgd); |
| 240 | } |
| 241 | #endif |
| 242 | |
| 243 | static inline pudval_t pud_flags(pud_t pud) |
| 244 | { |
| 245 | return native_pud_val(pud) & PTE_FLAGS_MASK; |
| 246 | } |
| 247 | |
| 248 | static inline pmdval_t pmd_flags(pmd_t pmd) |
| 249 | { |
| 250 | return native_pmd_val(pmd) & PTE_FLAGS_MASK; |
| 251 | } |
| 252 | |
| 253 | static inline pte_t native_make_pte(pteval_t val) |
| 254 | { |
| 255 | return (pte_t) { .pte = val }; |
| 256 | } |
| 257 | |
| 258 | static inline pteval_t native_pte_val(pte_t pte) |
| 259 | { |
| 260 | return pte.pte; |
| 261 | } |
| 262 | |
| 263 | static inline pteval_t pte_flags(pte_t pte) |
| 264 | { |
| 265 | return native_pte_val(pte) & PTE_FLAGS_MASK; |
| 266 | } |
| 267 | |
| 268 | #define pgprot_val(x) ((x).pgprot) |
| 269 | #define __pgprot(x) ((pgprot_t) { (x) } ) |
| 270 | |
| 271 | |
| 272 | typedef struct page *pgtable_t; |
| 273 | |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 274 | extern pteval_t __supported_pte_mask; |
Jeremy Fitzhardinge | 54321d9 | 2009-02-11 10:20:05 -0800 | [diff] [blame] | 275 | extern int nx_enabled; |
Ingo Molnar | 62436fe | 2009-03-05 14:39:03 +0100 | [diff] [blame] | 276 | extern void set_nx(void); |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 277 | |
| 278 | #define pgprot_writecombine pgprot_writecombine |
| 279 | extern pgprot_t pgprot_writecombine(pgprot_t prot); |
| 280 | |
| 281 | /* Indicate that x86 has its own track and untrack pfn vma functions */ |
| 282 | #define __HAVE_PFNMAP_TRACKING |
| 283 | |
| 284 | #define __HAVE_PHYS_MEM_ACCESS_PROT |
| 285 | struct file; |
| 286 | pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, |
| 287 | unsigned long size, pgprot_t vma_prot); |
| 288 | int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn, |
| 289 | unsigned long size, pgprot_t *vma_prot); |
| 290 | |
| 291 | /* Install a pte for a particular vaddr in kernel space. */ |
| 292 | void set_pte_vaddr(unsigned long vaddr, pte_t pte); |
| 293 | |
| 294 | #ifdef CONFIG_X86_32 |
| 295 | extern void native_pagetable_setup_start(pgd_t *base); |
| 296 | extern void native_pagetable_setup_done(pgd_t *base); |
| 297 | #else |
| 298 | static inline void native_pagetable_setup_start(pgd_t *base) {} |
| 299 | static inline void native_pagetable_setup_done(pgd_t *base) {} |
| 300 | #endif |
| 301 | |
| 302 | struct seq_file; |
| 303 | extern void arch_report_meminfo(struct seq_file *m); |
| 304 | |
| 305 | enum { |
| 306 | PG_LEVEL_NONE, |
| 307 | PG_LEVEL_4K, |
| 308 | PG_LEVEL_2M, |
| 309 | PG_LEVEL_1G, |
| 310 | PG_LEVEL_NUM |
| 311 | }; |
| 312 | |
| 313 | #ifdef CONFIG_PROC_FS |
| 314 | extern void update_page_count(int level, unsigned long pages); |
| 315 | #else |
| 316 | static inline void update_page_count(int level, unsigned long pages) { } |
| 317 | #endif |
| 318 | |
| 319 | /* |
| 320 | * Helper function that returns the kernel pagetable entry controlling |
| 321 | * the virtual address 'address'. NULL means no pagetable entry present. |
| 322 | * NOTE: the return type is pte_t but if the pmd is PSE then we return it |
| 323 | * as a pte too. |
| 324 | */ |
| 325 | extern pte_t *lookup_address(unsigned long address, unsigned int *level); |
| 326 | |
| 327 | #endif /* !__ASSEMBLY__ */ |
| 328 | |
Jeremy Fitzhardinge | 8d19c99 | 2009-02-08 18:46:18 -0800 | [diff] [blame] | 329 | #endif /* _ASM_X86_PGTABLE_DEFS_H */ |