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