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1da177e4 LT |
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[]; | |
f6c2e333 | 19 | extern pgd_t boot_level4_pgt[]; |
1da177e4 LT |
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 | ||
9c0aa0f9 | 89 | static inline void pud_clear (pud_t *pud) |
1da177e4 LT |
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 | ||
9c0aa0f9 | 99 | static inline void pgd_clear (pgd_t * pgd) |
1da177e4 LT |
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)) | |
61e06037 | 108 | |
8c65b4a6 TS |
109 | struct mm_struct; |
110 | ||
61e06037 ZA |
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 | ||
1da177e4 LT |
123 | #define pte_same(a, b) ((a).pte == (b).pte) |
124 | ||
c728252c AV |
125 | #define pte_pgprot(a) (__pgprot((a).pte & ~PHYSICAL_PAGE_MASK)) |
126 | ||
1da177e4 LT |
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 | ||
f83f2b5f | 134 | #define USER_PTRS_PER_PGD ((TASK_SIZE-1)/PGDIR_SIZE+1) |
d455a369 | 135 | #define FIRST_USER_ADDRESS 0 |
1da177e4 LT |
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 */ | |
9b4ee40e | 164 | #define _PAGE_FILE 0x040 /* nonlinear file mapping, saved PTE; unset:swap */ |
1da177e4 LT |
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) | |
8bf27556 EB |
197 | #define __PAGE_KERNEL_LARGE_EXEC \ |
198 | (__PAGE_KERNEL_EXEC | _PAGE_PSE) | |
1da177e4 LT |
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)) | |
6b75aeed | 253 | #define pte_pfn(x) ((pte_val(x) & __PHYSICAL_MASK) >> PAGE_SHIFT) |
1da177e4 LT |
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 | */ | |
32e51a8c | 268 | #define __LARGE_PTE (_PAGE_PSE|_PAGE_PRESENT) |
1da177e4 | 269 | static inline int pte_user(pte_t pte) { return pte_val(pte) & _PAGE_USER; } |
4839057c AB |
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; } | |
1da177e4 | 275 | static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; } |
8f860591 | 276 | static inline int pte_huge(pte_t pte) { return pte_val(pte) & _PAGE_PSE; } |
1da177e4 | 277 | |
4839057c AB |
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; } | |
8f860591 | 288 | static inline pte_t pte_mkhuge(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) | _PAGE_PSE)); return pte; } |
1da177e4 LT |
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; | |
3d1712c9 | 296 | return test_and_clear_bit(_PAGE_BIT_DIRTY, &ptep->pte); |
1da177e4 LT |
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; | |
3d1712c9 | 303 | return test_and_clear_bit(_PAGE_BIT_ACCESSED, &ptep->pte); |
1da177e4 LT |
304 | } |
305 | ||
306 | static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep) | |
307 | { | |
3d1712c9 | 308 | clear_bit(_PAGE_BIT_RW, &ptep->pte); |
1da177e4 LT |
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 | ||
1da177e4 LT |
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 | ||
1da177e4 LT |
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)) | |
340 | #define pud_offset_k(pgd, addr) pud_offset(pgd, addr) | |
341 | #define pud_present(pud) (pud_val(pud) & _PAGE_PRESENT) | |
342 | ||
343 | static inline pud_t *__pud_offset_k(pud_t *pud, unsigned long address) | |
344 | { | |
345 | return pud + pud_index(address); | |
346 | } | |
347 | ||
348 | /* PMD - Level 2 access */ | |
349 | #define pmd_page_kernel(pmd) ((unsigned long) __va(pmd_val(pmd) & PTE_MASK)) | |
350 | #define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT)) | |
351 | ||
352 | #define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)) | |
353 | #define pmd_offset(dir, address) ((pmd_t *) pud_page(*(dir)) + \ | |
354 | pmd_index(address)) | |
355 | #define pmd_none(x) (!pmd_val(x)) | |
356 | #define pmd_present(x) (pmd_val(x) & _PAGE_PRESENT) | |
357 | #define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0) | |
358 | #define pmd_bad(x) ((pmd_val(x) & (~PTE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE ) | |
359 | #define pfn_pmd(nr,prot) (__pmd(((nr) << PAGE_SHIFT) | pgprot_val(prot))) | |
6b75aeed | 360 | #define pmd_pfn(x) ((pmd_val(x) & __PHYSICAL_MASK) >> PAGE_SHIFT) |
1da177e4 LT |
361 | |
362 | #define pte_to_pgoff(pte) ((pte_val(pte) & PHYSICAL_PAGE_MASK) >> PAGE_SHIFT) | |
363 | #define pgoff_to_pte(off) ((pte_t) { ((off) << PAGE_SHIFT) | _PAGE_FILE }) | |
364 | #define PTE_FILE_MAX_BITS __PHYSICAL_MASK_SHIFT | |
365 | ||
366 | /* PTE - Level 1 access. */ | |
367 | ||
368 | /* page, protection -> pte */ | |
369 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) | |
370 | #define mk_pte_huge(entry) (pte_val(entry) |= _PAGE_PRESENT | _PAGE_PSE) | |
371 | ||
372 | /* physical address -> PTE */ | |
373 | static inline pte_t mk_pte_phys(unsigned long physpage, pgprot_t pgprot) | |
374 | { | |
375 | pte_t pte; | |
376 | pte_val(pte) = physpage | pgprot_val(pgprot); | |
377 | return pte; | |
378 | } | |
379 | ||
380 | /* Change flags of a PTE */ | |
9c0aa0f9 | 381 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
1da177e4 LT |
382 | { |
383 | pte_val(pte) &= _PAGE_CHG_MASK; | |
384 | pte_val(pte) |= pgprot_val(newprot); | |
385 | pte_val(pte) &= __supported_pte_mask; | |
386 | return pte; | |
387 | } | |
388 | ||
389 | #define pte_index(address) \ | |
1294b118 | 390 | (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) |
1da177e4 LT |
391 | #define pte_offset_kernel(dir, address) ((pte_t *) pmd_page_kernel(*(dir)) + \ |
392 | pte_index(address)) | |
393 | ||
394 | /* x86-64 always has all page tables mapped. */ | |
395 | #define pte_offset_map(dir,address) pte_offset_kernel(dir,address) | |
396 | #define pte_offset_map_nested(dir,address) pte_offset_kernel(dir,address) | |
397 | #define pte_unmap(pte) /* NOP */ | |
398 | #define pte_unmap_nested(pte) /* NOP */ | |
399 | ||
400 | #define update_mmu_cache(vma,address,pte) do { } while (0) | |
401 | ||
402 | /* We only update the dirty/accessed state if we set | |
403 | * the dirty bit by hand in the kernel, since the hardware | |
404 | * will do the accessed bit for us, and we don't want to | |
405 | * race with other CPU's that might be updating the dirty | |
406 | * bit at the same time. */ | |
407 | #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS | |
408 | #define ptep_set_access_flags(__vma, __address, __ptep, __entry, __dirty) \ | |
409 | do { \ | |
410 | if (__dirty) { \ | |
411 | set_pte(__ptep, __entry); \ | |
412 | flush_tlb_page(__vma, __address); \ | |
413 | } \ | |
414 | } while (0) | |
415 | ||
416 | /* Encode and de-code a swap entry */ | |
417 | #define __swp_type(x) (((x).val >> 1) & 0x3f) | |
418 | #define __swp_offset(x) ((x).val >> 8) | |
419 | #define __swp_entry(type, offset) ((swp_entry_t) { ((type) << 1) | ((offset) << 8) }) | |
420 | #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) | |
421 | #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) | |
422 | ||
423 | #endif /* !__ASSEMBLY__ */ | |
424 | ||
425 | extern int kern_addr_valid(unsigned long addr); | |
426 | ||
1da177e4 LT |
427 | #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \ |
428 | remap_pfn_range(vma, vaddr, pfn, size, prot) | |
429 | ||
430 | #define MK_IOSPACE_PFN(space, pfn) (pfn) | |
431 | #define GET_IOSPACE(pfn) 0 | |
432 | #define GET_PFN(pfn) (pfn) | |
433 | ||
434 | #define HAVE_ARCH_UNMAPPED_AREA | |
435 | ||
436 | #define pgtable_cache_init() do { } while (0) | |
437 | #define check_pgt_cache() do { } while (0) | |
438 | ||
439 | #define PAGE_AGP PAGE_KERNEL_NOCACHE | |
440 | #define HAVE_PAGE_AGP 1 | |
441 | ||
442 | /* fs/proc/kcore.c */ | |
443 | #define kc_vaddr_to_offset(v) ((v) & __VIRTUAL_MASK) | |
444 | #define kc_offset_to_vaddr(o) \ | |
445 | (((o) & (1UL << (__VIRTUAL_MASK_SHIFT-1))) ? ((o) | (~__VIRTUAL_MASK)) : (o)) | |
446 | ||
447 | #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG | |
448 | #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY | |
449 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR | |
61e06037 | 450 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL |
1da177e4 LT |
451 | #define __HAVE_ARCH_PTEP_SET_WRPROTECT |
452 | #define __HAVE_ARCH_PTE_SAME | |
453 | #include <asm-generic/pgtable.h> | |
454 | ||
455 | #endif /* _X86_64_PGTABLE_H */ |