Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _X86_64_PGTABLE_H |
| 2 | #define _X86_64_PGTABLE_H |
| 3 | |
| 4 | /* |
| 5 | * This file contains the functions and defines necessary to modify and use |
| 6 | * the x86-64 page table tree. |
| 7 | */ |
| 8 | #include <asm/processor.h> |
| 9 | #include <asm/fixmap.h> |
| 10 | #include <asm/bitops.h> |
| 11 | #include <linux/threads.h> |
| 12 | #include <asm/pda.h> |
| 13 | |
| 14 | extern pud_t level3_kernel_pgt[512]; |
| 15 | extern pud_t level3_physmem_pgt[512]; |
| 16 | extern pud_t level3_ident_pgt[512]; |
| 17 | extern pmd_t level2_kernel_pgt[512]; |
| 18 | extern pgd_t init_level4_pgt[]; |
Siddha, Suresh B | f6c2e33 | 2005-11-05 17:25:53 +0100 | [diff] [blame] | 19 | extern pgd_t boot_level4_pgt[]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | extern unsigned long __supported_pte_mask; |
| 21 | |
| 22 | #define swapper_pg_dir init_level4_pgt |
| 23 | |
| 24 | extern int nonx_setup(char *str); |
| 25 | extern void paging_init(void); |
| 26 | extern void clear_kernel_mapping(unsigned long addr, unsigned long size); |
| 27 | |
| 28 | extern unsigned long pgkern_mask; |
| 29 | |
| 30 | /* |
| 31 | * ZERO_PAGE is a global shared page that is always zero: used |
| 32 | * for zero-mapped memory areas etc.. |
| 33 | */ |
| 34 | extern unsigned long empty_zero_page[PAGE_SIZE/sizeof(unsigned long)]; |
| 35 | #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) |
| 36 | |
| 37 | /* |
| 38 | * PGDIR_SHIFT determines what a top-level page table entry can map |
| 39 | */ |
| 40 | #define PGDIR_SHIFT 39 |
| 41 | #define PTRS_PER_PGD 512 |
| 42 | |
| 43 | /* |
| 44 | * 3rd level page |
| 45 | */ |
| 46 | #define PUD_SHIFT 30 |
| 47 | #define PTRS_PER_PUD 512 |
| 48 | |
| 49 | /* |
| 50 | * PMD_SHIFT determines the size of the area a middle-level |
| 51 | * page table can map |
| 52 | */ |
| 53 | #define PMD_SHIFT 21 |
| 54 | #define PTRS_PER_PMD 512 |
| 55 | |
| 56 | /* |
| 57 | * entries per page directory level |
| 58 | */ |
| 59 | #define PTRS_PER_PTE 512 |
| 60 | |
| 61 | #define pte_ERROR(e) \ |
| 62 | printk("%s:%d: bad pte %p(%016lx).\n", __FILE__, __LINE__, &(e), pte_val(e)) |
| 63 | #define pmd_ERROR(e) \ |
| 64 | printk("%s:%d: bad pmd %p(%016lx).\n", __FILE__, __LINE__, &(e), pmd_val(e)) |
| 65 | #define pud_ERROR(e) \ |
| 66 | printk("%s:%d: bad pud %p(%016lx).\n", __FILE__, __LINE__, &(e), pud_val(e)) |
| 67 | #define pgd_ERROR(e) \ |
| 68 | printk("%s:%d: bad pgd %p(%016lx).\n", __FILE__, __LINE__, &(e), pgd_val(e)) |
| 69 | |
| 70 | #define pgd_none(x) (!pgd_val(x)) |
| 71 | #define pud_none(x) (!pud_val(x)) |
| 72 | |
| 73 | static inline void set_pte(pte_t *dst, pte_t val) |
| 74 | { |
| 75 | pte_val(*dst) = pte_val(val); |
| 76 | } |
| 77 | #define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval) |
| 78 | |
| 79 | static inline void set_pmd(pmd_t *dst, pmd_t val) |
| 80 | { |
| 81 | pmd_val(*dst) = pmd_val(val); |
| 82 | } |
| 83 | |
| 84 | static inline void set_pud(pud_t *dst, pud_t val) |
| 85 | { |
| 86 | pud_val(*dst) = pud_val(val); |
| 87 | } |
| 88 | |
Adrian Bunk | 9c0aa0f | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 89 | static inline void pud_clear (pud_t *pud) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | { |
| 91 | set_pud(pud, __pud(0)); |
| 92 | } |
| 93 | |
| 94 | static inline void set_pgd(pgd_t *dst, pgd_t val) |
| 95 | { |
| 96 | pgd_val(*dst) = pgd_val(val); |
| 97 | } |
| 98 | |
Adrian Bunk | 9c0aa0f | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 99 | static inline void pgd_clear (pgd_t * pgd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | { |
| 101 | set_pgd(pgd, __pgd(0)); |
| 102 | } |
| 103 | |
| 104 | #define pud_page(pud) \ |
| 105 | ((unsigned long) __va(pud_val(pud) & PHYSICAL_PAGE_MASK)) |
| 106 | |
| 107 | #define ptep_get_and_clear(mm,addr,xp) __pte(xchg(&(xp)->pte, 0)) |
Zachary Amsden | 61e0603 | 2005-09-03 15:55:06 -0700 | [diff] [blame] | 108 | |
Tim Schmielau | 8c65b4a | 2005-11-07 00:59:43 -0800 | [diff] [blame] | 109 | struct mm_struct; |
| 110 | |
Zachary Amsden | 61e0603 | 2005-09-03 15:55:06 -0700 | [diff] [blame] | 111 | static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, unsigned long addr, pte_t *ptep, int full) |
| 112 | { |
| 113 | pte_t pte; |
| 114 | if (full) { |
| 115 | pte = *ptep; |
| 116 | *ptep = __pte(0); |
| 117 | } else { |
| 118 | pte = ptep_get_and_clear(mm, addr, ptep); |
| 119 | } |
| 120 | return pte; |
| 121 | } |
| 122 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | #define pte_same(a, b) ((a).pte == (b).pte) |
| 124 | |
Arjan van de Ven | c728252 | 2006-01-06 00:12:03 -0800 | [diff] [blame] | 125 | #define pte_pgprot(a) (__pgprot((a).pte & ~PHYSICAL_PAGE_MASK)) |
| 126 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | #define PMD_SIZE (1UL << PMD_SHIFT) |
| 128 | #define PMD_MASK (~(PMD_SIZE-1)) |
| 129 | #define PUD_SIZE (1UL << PUD_SHIFT) |
| 130 | #define PUD_MASK (~(PUD_SIZE-1)) |
| 131 | #define PGDIR_SIZE (1UL << PGDIR_SHIFT) |
| 132 | #define PGDIR_MASK (~(PGDIR_SIZE-1)) |
| 133 | |
Jan Beulich | f83f2b5 | 2006-02-26 04:18:25 +0100 | [diff] [blame] | 134 | #define USER_PTRS_PER_PGD ((TASK_SIZE-1)/PGDIR_SIZE+1) |
Hugh Dickins | d455a36 | 2005-04-19 13:29:23 -0700 | [diff] [blame] | 135 | #define FIRST_USER_ADDRESS 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | |
| 137 | #ifndef __ASSEMBLY__ |
| 138 | #define MAXMEM 0x3fffffffffffUL |
| 139 | #define VMALLOC_START 0xffffc20000000000UL |
| 140 | #define VMALLOC_END 0xffffe1ffffffffffUL |
| 141 | #define MODULES_VADDR 0xffffffff88000000UL |
| 142 | #define MODULES_END 0xfffffffffff00000UL |
| 143 | #define MODULES_LEN (MODULES_END - MODULES_VADDR) |
| 144 | |
| 145 | #define _PAGE_BIT_PRESENT 0 |
| 146 | #define _PAGE_BIT_RW 1 |
| 147 | #define _PAGE_BIT_USER 2 |
| 148 | #define _PAGE_BIT_PWT 3 |
| 149 | #define _PAGE_BIT_PCD 4 |
| 150 | #define _PAGE_BIT_ACCESSED 5 |
| 151 | #define _PAGE_BIT_DIRTY 6 |
| 152 | #define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */ |
| 153 | #define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */ |
| 154 | #define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */ |
| 155 | |
| 156 | #define _PAGE_PRESENT 0x001 |
| 157 | #define _PAGE_RW 0x002 |
| 158 | #define _PAGE_USER 0x004 |
| 159 | #define _PAGE_PWT 0x008 |
| 160 | #define _PAGE_PCD 0x010 |
| 161 | #define _PAGE_ACCESSED 0x020 |
| 162 | #define _PAGE_DIRTY 0x040 |
| 163 | #define _PAGE_PSE 0x080 /* 2MB page */ |
Paolo 'Blaisorblade' Giarrusso | 9b4ee40 | 2005-09-03 15:54:57 -0700 | [diff] [blame] | 164 | #define _PAGE_FILE 0x040 /* nonlinear file mapping, saved PTE; unset:swap */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | #define _PAGE_GLOBAL 0x100 /* Global TLB entry */ |
| 166 | |
| 167 | #define _PAGE_PROTNONE 0x080 /* If not present */ |
| 168 | #define _PAGE_NX (1UL<<_PAGE_BIT_NX) |
| 169 | |
| 170 | #define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_DIRTY) |
| 171 | #define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY) |
| 172 | |
| 173 | #define _PAGE_CHG_MASK (PTE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY) |
| 174 | |
| 175 | #define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED) |
| 176 | #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX) |
| 177 | #define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED) |
| 178 | #define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX) |
| 179 | #define PAGE_COPY PAGE_COPY_NOEXEC |
| 180 | #define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED) |
| 181 | #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX) |
| 182 | #define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED) |
| 183 | #define __PAGE_KERNEL \ |
| 184 | (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_NX) |
| 185 | #define __PAGE_KERNEL_EXEC \ |
| 186 | (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED) |
| 187 | #define __PAGE_KERNEL_NOCACHE \ |
| 188 | (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_PCD | _PAGE_ACCESSED | _PAGE_NX) |
| 189 | #define __PAGE_KERNEL_RO \ |
| 190 | (_PAGE_PRESENT | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_NX) |
| 191 | #define __PAGE_KERNEL_VSYSCALL \ |
| 192 | (_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED) |
| 193 | #define __PAGE_KERNEL_VSYSCALL_NOCACHE \ |
| 194 | (_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_PCD) |
| 195 | #define __PAGE_KERNEL_LARGE \ |
| 196 | (__PAGE_KERNEL | _PAGE_PSE) |
Eric W. Biederman | 8bf2755 | 2005-07-29 13:25:28 -0600 | [diff] [blame] | 197 | #define __PAGE_KERNEL_LARGE_EXEC \ |
| 198 | (__PAGE_KERNEL_EXEC | _PAGE_PSE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | |
| 200 | #define MAKE_GLOBAL(x) __pgprot((x) | _PAGE_GLOBAL) |
| 201 | |
| 202 | #define PAGE_KERNEL MAKE_GLOBAL(__PAGE_KERNEL) |
| 203 | #define PAGE_KERNEL_EXEC MAKE_GLOBAL(__PAGE_KERNEL_EXEC) |
| 204 | #define PAGE_KERNEL_RO MAKE_GLOBAL(__PAGE_KERNEL_RO) |
| 205 | #define PAGE_KERNEL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_NOCACHE) |
| 206 | #define PAGE_KERNEL_VSYSCALL32 __pgprot(__PAGE_KERNEL_VSYSCALL) |
| 207 | #define PAGE_KERNEL_VSYSCALL MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL) |
| 208 | #define PAGE_KERNEL_LARGE MAKE_GLOBAL(__PAGE_KERNEL_LARGE) |
| 209 | #define PAGE_KERNEL_VSYSCALL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL_NOCACHE) |
| 210 | |
| 211 | /* xwr */ |
| 212 | #define __P000 PAGE_NONE |
| 213 | #define __P001 PAGE_READONLY |
| 214 | #define __P010 PAGE_COPY |
| 215 | #define __P011 PAGE_COPY |
| 216 | #define __P100 PAGE_READONLY_EXEC |
| 217 | #define __P101 PAGE_READONLY_EXEC |
| 218 | #define __P110 PAGE_COPY_EXEC |
| 219 | #define __P111 PAGE_COPY_EXEC |
| 220 | |
| 221 | #define __S000 PAGE_NONE |
| 222 | #define __S001 PAGE_READONLY |
| 223 | #define __S010 PAGE_SHARED |
| 224 | #define __S011 PAGE_SHARED |
| 225 | #define __S100 PAGE_READONLY_EXEC |
| 226 | #define __S101 PAGE_READONLY_EXEC |
| 227 | #define __S110 PAGE_SHARED_EXEC |
| 228 | #define __S111 PAGE_SHARED_EXEC |
| 229 | |
| 230 | static inline unsigned long pgd_bad(pgd_t pgd) |
| 231 | { |
| 232 | unsigned long val = pgd_val(pgd); |
| 233 | val &= ~PTE_MASK; |
| 234 | val &= ~(_PAGE_USER | _PAGE_DIRTY); |
| 235 | return val & ~(_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED); |
| 236 | } |
| 237 | |
| 238 | static inline unsigned long pud_bad(pud_t pud) |
| 239 | { |
| 240 | unsigned long val = pud_val(pud); |
| 241 | val &= ~PTE_MASK; |
| 242 | val &= ~(_PAGE_USER | _PAGE_DIRTY); |
| 243 | return val & ~(_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED); |
| 244 | } |
| 245 | |
| 246 | #define pte_none(x) (!pte_val(x)) |
| 247 | #define pte_present(x) (pte_val(x) & (_PAGE_PRESENT | _PAGE_PROTNONE)) |
| 248 | #define pte_clear(mm,addr,xp) do { set_pte_at(mm, addr, xp, __pte(0)); } while (0) |
| 249 | |
| 250 | #define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT)) /* FIXME: is this |
| 251 | right? */ |
| 252 | #define pte_page(x) pfn_to_page(pte_pfn(x)) |
Andi Kleen | 6b75aee | 2005-11-05 17:25:53 +0100 | [diff] [blame] | 253 | #define pte_pfn(x) ((pte_val(x) & __PHYSICAL_MASK) >> PAGE_SHIFT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | |
| 255 | static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot) |
| 256 | { |
| 257 | pte_t pte; |
| 258 | pte_val(pte) = (page_nr << PAGE_SHIFT); |
| 259 | pte_val(pte) |= pgprot_val(pgprot); |
| 260 | pte_val(pte) &= __supported_pte_mask; |
| 261 | return pte; |
| 262 | } |
| 263 | |
| 264 | /* |
| 265 | * The following only work if pte_present() is true. |
| 266 | * Undefined behaviour if not.. |
| 267 | */ |
Adam Litke | 32e51a8 | 2005-09-03 15:54:59 -0700 | [diff] [blame] | 268 | #define __LARGE_PTE (_PAGE_PSE|_PAGE_PRESENT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | static inline int pte_user(pte_t pte) { return pte_val(pte) & _PAGE_USER; } |
Adrian Bunk | 4839057 | 2006-01-11 22:44:12 +0100 | [diff] [blame] | 270 | static inline int pte_read(pte_t pte) { return pte_val(pte) & _PAGE_USER; } |
| 271 | static inline int pte_exec(pte_t pte) { return pte_val(pte) & _PAGE_USER; } |
| 272 | static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; } |
| 273 | static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; } |
| 274 | static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_RW; } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; } |
Zhang, Yanmin | 8f86059 | 2006-03-22 00:08:50 -0800 | [diff] [blame] | 276 | static inline int pte_huge(pte_t pte) { return pte_val(pte) & _PAGE_PSE; } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | |
Adrian Bunk | 4839057 | 2006-01-11 22:44:12 +0100 | [diff] [blame] | 278 | static inline pte_t pte_rdprotect(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_USER)); return pte; } |
| 279 | static inline pte_t pte_exprotect(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_USER)); return pte; } |
| 280 | static inline pte_t pte_mkclean(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_DIRTY)); return pte; } |
| 281 | static inline pte_t pte_mkold(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_ACCESSED)); return pte; } |
| 282 | static inline pte_t pte_wrprotect(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_RW)); return pte; } |
| 283 | static inline pte_t pte_mkread(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) | _PAGE_USER)); return pte; } |
| 284 | static inline pte_t pte_mkexec(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) | _PAGE_USER)); return pte; } |
| 285 | static inline pte_t pte_mkdirty(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) | _PAGE_DIRTY)); return pte; } |
| 286 | static inline pte_t pte_mkyoung(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) | _PAGE_ACCESSED)); return pte; } |
| 287 | static inline pte_t pte_mkwrite(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) | _PAGE_RW)); return pte; } |
Zhang, Yanmin | 8f86059 | 2006-03-22 00:08:50 -0800 | [diff] [blame] | 288 | static inline pte_t pte_mkhuge(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) | _PAGE_PSE)); return pte; } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | |
| 290 | struct vm_area_struct; |
| 291 | |
| 292 | static inline int ptep_test_and_clear_dirty(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep) |
| 293 | { |
| 294 | if (!pte_dirty(*ptep)) |
| 295 | return 0; |
Akinobu Mita | 3d1712c | 2006-03-24 03:15:11 -0800 | [diff] [blame] | 296 | return test_and_clear_bit(_PAGE_BIT_DIRTY, &ptep->pte); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | } |
| 298 | |
| 299 | static inline int ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep) |
| 300 | { |
| 301 | if (!pte_young(*ptep)) |
| 302 | return 0; |
Akinobu Mita | 3d1712c | 2006-03-24 03:15:11 -0800 | [diff] [blame] | 303 | return test_and_clear_bit(_PAGE_BIT_ACCESSED, &ptep->pte); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | } |
| 305 | |
| 306 | static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep) |
| 307 | { |
Akinobu Mita | 3d1712c | 2006-03-24 03:15:11 -0800 | [diff] [blame] | 308 | clear_bit(_PAGE_BIT_RW, &ptep->pte); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | } |
| 310 | |
| 311 | /* |
| 312 | * Macro to mark a page protection value as "uncacheable". |
| 313 | */ |
| 314 | #define pgprot_noncached(prot) (__pgprot(pgprot_val(prot) | _PAGE_PCD | _PAGE_PWT)) |
| 315 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | static inline int pmd_large(pmd_t pte) { |
| 317 | return (pmd_val(pte) & __LARGE_PTE) == __LARGE_PTE; |
| 318 | } |
| 319 | |
| 320 | |
| 321 | /* |
| 322 | * Conversion functions: convert a page and protection to a page entry, |
| 323 | * and a page entry and page directory to the page they refer to. |
| 324 | */ |
| 325 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | /* |
| 327 | * Level 4 access. |
| 328 | */ |
| 329 | #define pgd_page(pgd) ((unsigned long) __va((unsigned long)pgd_val(pgd) & PTE_MASK)) |
| 330 | #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1)) |
| 331 | #define pgd_offset(mm, addr) ((mm)->pgd + pgd_index(addr)) |
| 332 | #define pgd_offset_k(address) (init_level4_pgt + pgd_index(address)) |
| 333 | #define pgd_present(pgd) (pgd_val(pgd) & _PAGE_PRESENT) |
| 334 | #define mk_kernel_pgd(address) ((pgd_t){ (address) | _KERNPG_TABLE }) |
| 335 | |
| 336 | /* PUD - Level3 access */ |
| 337 | /* to find an entry in a page-table-directory. */ |
| 338 | #define pud_index(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD-1)) |
| 339 | #define pud_offset(pgd, address) ((pud_t *) pgd_page(*(pgd)) + pud_index(address)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | #define pud_present(pud) (pud_val(pud) & _PAGE_PRESENT) |
| 341 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | /* PMD - Level 2 access */ |
| 343 | #define pmd_page_kernel(pmd) ((unsigned long) __va(pmd_val(pmd) & PTE_MASK)) |
| 344 | #define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT)) |
| 345 | |
| 346 | #define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)) |
| 347 | #define pmd_offset(dir, address) ((pmd_t *) pud_page(*(dir)) + \ |
| 348 | pmd_index(address)) |
| 349 | #define pmd_none(x) (!pmd_val(x)) |
| 350 | #define pmd_present(x) (pmd_val(x) & _PAGE_PRESENT) |
| 351 | #define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0) |
| 352 | #define pmd_bad(x) ((pmd_val(x) & (~PTE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE ) |
| 353 | #define pfn_pmd(nr,prot) (__pmd(((nr) << PAGE_SHIFT) | pgprot_val(prot))) |
Andi Kleen | 6b75aee | 2005-11-05 17:25:53 +0100 | [diff] [blame] | 354 | #define pmd_pfn(x) ((pmd_val(x) & __PHYSICAL_MASK) >> PAGE_SHIFT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | |
| 356 | #define pte_to_pgoff(pte) ((pte_val(pte) & PHYSICAL_PAGE_MASK) >> PAGE_SHIFT) |
| 357 | #define pgoff_to_pte(off) ((pte_t) { ((off) << PAGE_SHIFT) | _PAGE_FILE }) |
| 358 | #define PTE_FILE_MAX_BITS __PHYSICAL_MASK_SHIFT |
| 359 | |
| 360 | /* PTE - Level 1 access. */ |
| 361 | |
| 362 | /* page, protection -> pte */ |
| 363 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) |
| 364 | #define mk_pte_huge(entry) (pte_val(entry) |= _PAGE_PRESENT | _PAGE_PSE) |
| 365 | |
| 366 | /* physical address -> PTE */ |
| 367 | static inline pte_t mk_pte_phys(unsigned long physpage, pgprot_t pgprot) |
| 368 | { |
| 369 | pte_t pte; |
| 370 | pte_val(pte) = physpage | pgprot_val(pgprot); |
| 371 | return pte; |
| 372 | } |
| 373 | |
| 374 | /* Change flags of a PTE */ |
Adrian Bunk | 9c0aa0f | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 375 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | { |
| 377 | pte_val(pte) &= _PAGE_CHG_MASK; |
| 378 | pte_val(pte) |= pgprot_val(newprot); |
| 379 | pte_val(pte) &= __supported_pte_mask; |
| 380 | return pte; |
| 381 | } |
| 382 | |
| 383 | #define pte_index(address) \ |
Kirill Korotaev | 1294b11 | 2005-09-30 10:32:19 +0400 | [diff] [blame] | 384 | (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | #define pte_offset_kernel(dir, address) ((pte_t *) pmd_page_kernel(*(dir)) + \ |
| 386 | pte_index(address)) |
| 387 | |
| 388 | /* x86-64 always has all page tables mapped. */ |
| 389 | #define pte_offset_map(dir,address) pte_offset_kernel(dir,address) |
| 390 | #define pte_offset_map_nested(dir,address) pte_offset_kernel(dir,address) |
| 391 | #define pte_unmap(pte) /* NOP */ |
| 392 | #define pte_unmap_nested(pte) /* NOP */ |
| 393 | |
| 394 | #define update_mmu_cache(vma,address,pte) do { } while (0) |
| 395 | |
| 396 | /* We only update the dirty/accessed state if we set |
| 397 | * the dirty bit by hand in the kernel, since the hardware |
| 398 | * will do the accessed bit for us, and we don't want to |
| 399 | * race with other CPU's that might be updating the dirty |
| 400 | * bit at the same time. */ |
| 401 | #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS |
| 402 | #define ptep_set_access_flags(__vma, __address, __ptep, __entry, __dirty) \ |
| 403 | do { \ |
| 404 | if (__dirty) { \ |
| 405 | set_pte(__ptep, __entry); \ |
| 406 | flush_tlb_page(__vma, __address); \ |
| 407 | } \ |
| 408 | } while (0) |
| 409 | |
| 410 | /* Encode and de-code a swap entry */ |
| 411 | #define __swp_type(x) (((x).val >> 1) & 0x3f) |
| 412 | #define __swp_offset(x) ((x).val >> 8) |
| 413 | #define __swp_entry(type, offset) ((swp_entry_t) { ((type) << 1) | ((offset) << 8) }) |
| 414 | #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) |
| 415 | #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) |
| 416 | |
Jan Beulich | 8c914cb | 2006-03-25 16:29:40 +0100 | [diff] [blame] | 417 | extern spinlock_t pgd_lock; |
| 418 | extern struct page *pgd_list; |
| 419 | void vmalloc_sync_all(void); |
| 420 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | #endif /* !__ASSEMBLY__ */ |
| 422 | |
| 423 | extern int kern_addr_valid(unsigned long addr); |
| 424 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \ |
| 426 | remap_pfn_range(vma, vaddr, pfn, size, prot) |
| 427 | |
| 428 | #define MK_IOSPACE_PFN(space, pfn) (pfn) |
| 429 | #define GET_IOSPACE(pfn) 0 |
| 430 | #define GET_PFN(pfn) (pfn) |
| 431 | |
| 432 | #define HAVE_ARCH_UNMAPPED_AREA |
| 433 | |
| 434 | #define pgtable_cache_init() do { } while (0) |
| 435 | #define check_pgt_cache() do { } while (0) |
| 436 | |
| 437 | #define PAGE_AGP PAGE_KERNEL_NOCACHE |
| 438 | #define HAVE_PAGE_AGP 1 |
| 439 | |
| 440 | /* fs/proc/kcore.c */ |
| 441 | #define kc_vaddr_to_offset(v) ((v) & __VIRTUAL_MASK) |
| 442 | #define kc_offset_to_vaddr(o) \ |
| 443 | (((o) & (1UL << (__VIRTUAL_MASK_SHIFT-1))) ? ((o) | (~__VIRTUAL_MASK)) : (o)) |
| 444 | |
| 445 | #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG |
| 446 | #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY |
| 447 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR |
Zachary Amsden | 61e0603 | 2005-09-03 15:55:06 -0700 | [diff] [blame] | 448 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | #define __HAVE_ARCH_PTEP_SET_WRPROTECT |
| 450 | #define __HAVE_ARCH_PTE_SAME |
| 451 | #include <asm-generic/pgtable.h> |
| 452 | |
| 453 | #endif /* _X86_64_PGTABLE_H */ |