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1da177e4 LT |
1 | /* $Id: pgtable.h,v 1.110 2001/12/21 04:56:17 davem Exp $ */ |
2 | #ifndef _SPARC_PGTABLE_H | |
3 | #define _SPARC_PGTABLE_H | |
4 | ||
5 | /* asm-sparc/pgtable.h: Defines and functions used to work | |
6 | * with Sparc page tables. | |
7 | * | |
8 | * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) | |
9 | * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) | |
10 | */ | |
11 | ||
12 | #include <asm-generic/4level-fixup.h> | |
13 | ||
1da177e4 LT |
14 | #include <linux/spinlock.h> |
15 | #include <linux/swap.h> | |
16 | #include <asm/types.h> | |
17 | #ifdef CONFIG_SUN4 | |
18 | #include <asm/pgtsun4.h> | |
19 | #else | |
20 | #include <asm/pgtsun4c.h> | |
21 | #endif | |
22 | #include <asm/pgtsrmmu.h> | |
23 | #include <asm/vac-ops.h> | |
24 | #include <asm/oplib.h> | |
25 | #include <asm/btfixup.h> | |
26 | #include <asm/system.h> | |
27 | ||
28 | #ifndef __ASSEMBLY__ | |
29 | ||
30 | struct vm_area_struct; | |
31 | struct page; | |
32 | ||
33 | extern void load_mmu(void); | |
34 | extern unsigned long calc_highpages(void); | |
35 | ||
36 | BTFIXUPDEF_SIMM13(pgdir_shift) | |
37 | BTFIXUPDEF_SETHI(pgdir_size) | |
38 | BTFIXUPDEF_SETHI(pgdir_mask) | |
39 | ||
40 | BTFIXUPDEF_SIMM13(ptrs_per_pmd) | |
41 | BTFIXUPDEF_SIMM13(ptrs_per_pgd) | |
42 | BTFIXUPDEF_SIMM13(user_ptrs_per_pgd) | |
43 | ||
44 | #define pte_ERROR(e) __builtin_trap() | |
45 | #define pmd_ERROR(e) __builtin_trap() | |
46 | #define pgd_ERROR(e) __builtin_trap() | |
47 | ||
48 | BTFIXUPDEF_INT(page_none) | |
1da177e4 LT |
49 | BTFIXUPDEF_INT(page_copy) |
50 | BTFIXUPDEF_INT(page_readonly) | |
51 | BTFIXUPDEF_INT(page_kernel) | |
52 | ||
53 | #define PMD_SHIFT SUN4C_PMD_SHIFT | |
54 | #define PMD_SIZE (1UL << PMD_SHIFT) | |
55 | #define PMD_MASK (~(PMD_SIZE-1)) | |
56 | #define PMD_ALIGN(__addr) (((__addr) + ~PMD_MASK) & PMD_MASK) | |
57 | #define PGDIR_SHIFT BTFIXUP_SIMM13(pgdir_shift) | |
58 | #define PGDIR_SIZE BTFIXUP_SETHI(pgdir_size) | |
59 | #define PGDIR_MASK BTFIXUP_SETHI(pgdir_mask) | |
60 | #define PTRS_PER_PTE 1024 | |
61 | #define PTRS_PER_PMD BTFIXUP_SIMM13(ptrs_per_pmd) | |
62 | #define PTRS_PER_PGD BTFIXUP_SIMM13(ptrs_per_pgd) | |
63 | #define USER_PTRS_PER_PGD BTFIXUP_SIMM13(user_ptrs_per_pgd) | |
d455a369 | 64 | #define FIRST_USER_ADDRESS 0 |
1da177e4 LT |
65 | #define PTE_SIZE (PTRS_PER_PTE*4) |
66 | ||
67 | #define PAGE_NONE __pgprot(BTFIXUP_INT(page_none)) | |
378e515c | 68 | extern pgprot_t PAGE_SHARED; |
1da177e4 LT |
69 | #define PAGE_COPY __pgprot(BTFIXUP_INT(page_copy)) |
70 | #define PAGE_READONLY __pgprot(BTFIXUP_INT(page_readonly)) | |
71 | ||
72 | extern unsigned long page_kernel; | |
73 | ||
74 | #ifdef MODULE | |
75 | #define PAGE_KERNEL page_kernel | |
76 | #else | |
77 | #define PAGE_KERNEL __pgprot(BTFIXUP_INT(page_kernel)) | |
78 | #endif | |
79 | ||
80 | /* Top-level page directory */ | |
81 | extern pgd_t swapper_pg_dir[1024]; | |
82 | ||
801ab3c7 DM |
83 | extern void paging_init(void); |
84 | ||
1da177e4 LT |
85 | /* Page table for 0-4MB for everybody, on the Sparc this |
86 | * holds the same as on the i386. | |
87 | */ | |
88 | extern pte_t pg0[1024]; | |
89 | extern pte_t pg1[1024]; | |
90 | extern pte_t pg2[1024]; | |
91 | extern pte_t pg3[1024]; | |
92 | ||
93 | extern unsigned long ptr_in_current_pgd; | |
94 | ||
95 | /* Here is a trick, since mmap.c need the initializer elements for | |
96 | * protection_map[] to be constant at compile time, I set the following | |
97 | * to all zeros. I set it to the real values after I link in the | |
98 | * appropriate MMU page table routines at boot time. | |
99 | */ | |
100 | #define __P000 __pgprot(0) | |
101 | #define __P001 __pgprot(0) | |
102 | #define __P010 __pgprot(0) | |
103 | #define __P011 __pgprot(0) | |
104 | #define __P100 __pgprot(0) | |
105 | #define __P101 __pgprot(0) | |
106 | #define __P110 __pgprot(0) | |
107 | #define __P111 __pgprot(0) | |
108 | ||
109 | #define __S000 __pgprot(0) | |
110 | #define __S001 __pgprot(0) | |
111 | #define __S010 __pgprot(0) | |
112 | #define __S011 __pgprot(0) | |
113 | #define __S100 __pgprot(0) | |
114 | #define __S101 __pgprot(0) | |
115 | #define __S110 __pgprot(0) | |
116 | #define __S111 __pgprot(0) | |
117 | ||
118 | extern int num_contexts; | |
119 | ||
120 | /* First physical page can be anywhere, the following is needed so that | |
121 | * va-->pa and vice versa conversions work properly without performance | |
122 | * hit for all __pa()/__va() operations. | |
123 | */ | |
124 | extern unsigned long phys_base; | |
125 | extern unsigned long pfn_base; | |
126 | ||
127 | /* | |
128 | * BAD_PAGETABLE is used when we need a bogus page-table, while | |
129 | * BAD_PAGE is used for a bogus page. | |
130 | * | |
131 | * ZERO_PAGE is a global shared page that is always zero: used | |
132 | * for zero-mapped memory areas etc.. | |
133 | */ | |
134 | extern pte_t * __bad_pagetable(void); | |
135 | extern pte_t __bad_page(void); | |
136 | extern unsigned long empty_zero_page; | |
137 | ||
138 | #define BAD_PAGETABLE __bad_pagetable() | |
139 | #define BAD_PAGE __bad_page() | |
140 | #define ZERO_PAGE(vaddr) (virt_to_page(&empty_zero_page)) | |
141 | ||
142 | /* | |
143 | */ | |
144 | BTFIXUPDEF_CALL_CONST(struct page *, pmd_page, pmd_t) | |
46a82b2d | 145 | BTFIXUPDEF_CALL_CONST(unsigned long, pgd_page_vaddr, pgd_t) |
1da177e4 LT |
146 | |
147 | #define pmd_page(pmd) BTFIXUP_CALL(pmd_page)(pmd) | |
46a82b2d | 148 | #define pgd_page_vaddr(pgd) BTFIXUP_CALL(pgd_page_vaddr)(pgd) |
1da177e4 LT |
149 | |
150 | BTFIXUPDEF_SETHI(none_mask) | |
151 | BTFIXUPDEF_CALL_CONST(int, pte_present, pte_t) | |
152 | BTFIXUPDEF_CALL(void, pte_clear, pte_t *) | |
1da177e4 | 153 | |
3115624e | 154 | static inline int pte_none(pte_t pte) |
1da177e4 LT |
155 | { |
156 | return !(pte_val(pte) & ~BTFIXUP_SETHI(none_mask)); | |
157 | } | |
158 | ||
159 | #define pte_present(pte) BTFIXUP_CALL(pte_present)(pte) | |
160 | #define pte_clear(mm,addr,pte) BTFIXUP_CALL(pte_clear)(pte) | |
1da177e4 LT |
161 | |
162 | BTFIXUPDEF_CALL_CONST(int, pmd_bad, pmd_t) | |
163 | BTFIXUPDEF_CALL_CONST(int, pmd_present, pmd_t) | |
164 | BTFIXUPDEF_CALL(void, pmd_clear, pmd_t *) | |
165 | ||
3115624e | 166 | static inline int pmd_none(pmd_t pmd) |
1da177e4 LT |
167 | { |
168 | return !(pmd_val(pmd) & ~BTFIXUP_SETHI(none_mask)); | |
169 | } | |
170 | ||
171 | #define pmd_bad(pmd) BTFIXUP_CALL(pmd_bad)(pmd) | |
172 | #define pmd_present(pmd) BTFIXUP_CALL(pmd_present)(pmd) | |
173 | #define pmd_clear(pmd) BTFIXUP_CALL(pmd_clear)(pmd) | |
174 | ||
175 | BTFIXUPDEF_CALL_CONST(int, pgd_none, pgd_t) | |
176 | BTFIXUPDEF_CALL_CONST(int, pgd_bad, pgd_t) | |
177 | BTFIXUPDEF_CALL_CONST(int, pgd_present, pgd_t) | |
178 | BTFIXUPDEF_CALL(void, pgd_clear, pgd_t *) | |
179 | ||
180 | #define pgd_none(pgd) BTFIXUP_CALL(pgd_none)(pgd) | |
181 | #define pgd_bad(pgd) BTFIXUP_CALL(pgd_bad)(pgd) | |
182 | #define pgd_present(pgd) BTFIXUP_CALL(pgd_present)(pgd) | |
183 | #define pgd_clear(pgd) BTFIXUP_CALL(pgd_clear)(pgd) | |
184 | ||
185 | /* | |
186 | * The following only work if pte_present() is true. | |
187 | * Undefined behaviour if not.. | |
188 | */ | |
189 | BTFIXUPDEF_HALF(pte_writei) | |
190 | BTFIXUPDEF_HALF(pte_dirtyi) | |
191 | BTFIXUPDEF_HALF(pte_youngi) | |
192 | ||
329d4dd7 | 193 | static int pte_write(pte_t pte) __attribute_const__; |
3115624e | 194 | static inline int pte_write(pte_t pte) |
1da177e4 LT |
195 | { |
196 | return pte_val(pte) & BTFIXUP_HALF(pte_writei); | |
197 | } | |
198 | ||
329d4dd7 | 199 | static int pte_dirty(pte_t pte) __attribute_const__; |
3115624e | 200 | static inline int pte_dirty(pte_t pte) |
1da177e4 LT |
201 | { |
202 | return pte_val(pte) & BTFIXUP_HALF(pte_dirtyi); | |
203 | } | |
204 | ||
329d4dd7 | 205 | static int pte_young(pte_t pte) __attribute_const__; |
3115624e | 206 | static inline int pte_young(pte_t pte) |
1da177e4 LT |
207 | { |
208 | return pte_val(pte) & BTFIXUP_HALF(pte_youngi); | |
209 | } | |
210 | ||
211 | /* | |
212 | * The following only work if pte_present() is not true. | |
213 | */ | |
214 | BTFIXUPDEF_HALF(pte_filei) | |
215 | ||
329d4dd7 | 216 | static int pte_file(pte_t pte) __attribute_const__; |
3115624e | 217 | static inline int pte_file(pte_t pte) |
1da177e4 LT |
218 | { |
219 | return pte_val(pte) & BTFIXUP_HALF(pte_filei); | |
220 | } | |
221 | ||
7e675137 NP |
222 | static inline int pte_special(pte_t pte) |
223 | { | |
224 | return 0; | |
225 | } | |
226 | ||
1da177e4 LT |
227 | /* |
228 | */ | |
229 | BTFIXUPDEF_HALF(pte_wrprotecti) | |
230 | BTFIXUPDEF_HALF(pte_mkcleani) | |
231 | BTFIXUPDEF_HALF(pte_mkoldi) | |
232 | ||
329d4dd7 | 233 | static pte_t pte_wrprotect(pte_t pte) __attribute_const__; |
3115624e | 234 | static inline pte_t pte_wrprotect(pte_t pte) |
1da177e4 LT |
235 | { |
236 | return __pte(pte_val(pte) & ~BTFIXUP_HALF(pte_wrprotecti)); | |
237 | } | |
238 | ||
329d4dd7 | 239 | static pte_t pte_mkclean(pte_t pte) __attribute_const__; |
3115624e | 240 | static inline pte_t pte_mkclean(pte_t pte) |
1da177e4 LT |
241 | { |
242 | return __pte(pte_val(pte) & ~BTFIXUP_HALF(pte_mkcleani)); | |
243 | } | |
244 | ||
329d4dd7 | 245 | static pte_t pte_mkold(pte_t pte) __attribute_const__; |
3115624e | 246 | static inline pte_t pte_mkold(pte_t pte) |
1da177e4 LT |
247 | { |
248 | return __pte(pte_val(pte) & ~BTFIXUP_HALF(pte_mkoldi)); | |
249 | } | |
250 | ||
251 | BTFIXUPDEF_CALL_CONST(pte_t, pte_mkwrite, pte_t) | |
252 | BTFIXUPDEF_CALL_CONST(pte_t, pte_mkdirty, pte_t) | |
253 | BTFIXUPDEF_CALL_CONST(pte_t, pte_mkyoung, pte_t) | |
254 | ||
255 | #define pte_mkwrite(pte) BTFIXUP_CALL(pte_mkwrite)(pte) | |
256 | #define pte_mkdirty(pte) BTFIXUP_CALL(pte_mkdirty)(pte) | |
257 | #define pte_mkyoung(pte) BTFIXUP_CALL(pte_mkyoung)(pte) | |
258 | ||
7e675137 NP |
259 | #define pte_mkspecial(pte) (pte) |
260 | ||
1da177e4 LT |
261 | #define pfn_pte(pfn, prot) mk_pte(pfn_to_page(pfn), prot) |
262 | ||
263 | BTFIXUPDEF_CALL(unsigned long, pte_pfn, pte_t) | |
264 | #define pte_pfn(pte) BTFIXUP_CALL(pte_pfn)(pte) | |
265 | #define pte_page(pte) pfn_to_page(pte_pfn(pte)) | |
266 | ||
267 | /* | |
268 | * Conversion functions: convert a page and protection to a page entry, | |
269 | * and a page entry and page directory to the page they refer to. | |
270 | */ | |
271 | BTFIXUPDEF_CALL_CONST(pte_t, mk_pte, struct page *, pgprot_t) | |
272 | ||
273 | BTFIXUPDEF_CALL_CONST(pte_t, mk_pte_phys, unsigned long, pgprot_t) | |
274 | BTFIXUPDEF_CALL_CONST(pte_t, mk_pte_io, unsigned long, pgprot_t, int) | |
14778d90 | 275 | BTFIXUPDEF_CALL_CONST(pgprot_t, pgprot_noncached, pgprot_t) |
1da177e4 LT |
276 | |
277 | #define mk_pte(page,pgprot) BTFIXUP_CALL(mk_pte)(page,pgprot) | |
278 | #define mk_pte_phys(page,pgprot) BTFIXUP_CALL(mk_pte_phys)(page,pgprot) | |
279 | #define mk_pte_io(page,pgprot,space) BTFIXUP_CALL(mk_pte_io)(page,pgprot,space) | |
280 | ||
14778d90 DM |
281 | #define pgprot_noncached(pgprot) BTFIXUP_CALL(pgprot_noncached)(pgprot) |
282 | ||
1da177e4 LT |
283 | BTFIXUPDEF_INT(pte_modify_mask) |
284 | ||
329d4dd7 | 285 | static pte_t pte_modify(pte_t pte, pgprot_t newprot) __attribute_const__; |
3115624e | 286 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
1da177e4 LT |
287 | { |
288 | return __pte((pte_val(pte) & BTFIXUP_INT(pte_modify_mask)) | | |
289 | pgprot_val(newprot)); | |
290 | } | |
291 | ||
292 | #define pgd_index(address) ((address) >> PGDIR_SHIFT) | |
293 | ||
294 | /* to find an entry in a page-table-directory */ | |
295 | #define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address)) | |
296 | ||
297 | /* to find an entry in a kernel page-table-directory */ | |
298 | #define pgd_offset_k(address) pgd_offset(&init_mm, address) | |
299 | ||
300 | /* Find an entry in the second-level page table.. */ | |
301 | BTFIXUPDEF_CALL(pmd_t *, pmd_offset, pgd_t *, unsigned long) | |
302 | #define pmd_offset(dir,addr) BTFIXUP_CALL(pmd_offset)(dir,addr) | |
303 | ||
304 | /* Find an entry in the third-level page table.. */ | |
305 | BTFIXUPDEF_CALL(pte_t *, pte_offset_kernel, pmd_t *, unsigned long) | |
306 | #define pte_offset_kernel(dir,addr) BTFIXUP_CALL(pte_offset_kernel)(dir,addr) | |
307 | ||
308 | /* | |
309 | * This shortcut works on sun4m (and sun4d) because the nocache area is static, | |
310 | * and sun4c is guaranteed to have no highmem anyway. | |
311 | */ | |
312 | #define pte_offset_map(d, a) pte_offset_kernel(d,a) | |
313 | #define pte_offset_map_nested(d, a) pte_offset_kernel(d,a) | |
314 | ||
315 | #define pte_unmap(pte) do{}while(0) | |
316 | #define pte_unmap_nested(pte) do{}while(0) | |
317 | ||
1da177e4 LT |
318 | /* Certain architectures need to do special things when pte's |
319 | * within a page table are directly modified. Thus, the following | |
320 | * hook is made available. | |
321 | */ | |
322 | ||
323 | BTFIXUPDEF_CALL(void, set_pte, pte_t *, pte_t) | |
324 | ||
325 | #define set_pte(ptep,pteval) BTFIXUP_CALL(set_pte)(ptep,pteval) | |
326 | #define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval) | |
327 | ||
328 | struct seq_file; | |
329 | BTFIXUPDEF_CALL(void, mmu_info, struct seq_file *) | |
330 | ||
331 | #define mmu_info(p) BTFIXUP_CALL(mmu_info)(p) | |
332 | ||
333 | /* Fault handler stuff... */ | |
334 | #define FAULT_CODE_PROT 0x1 | |
335 | #define FAULT_CODE_WRITE 0x2 | |
336 | #define FAULT_CODE_USER 0x4 | |
337 | ||
338 | BTFIXUPDEF_CALL(void, update_mmu_cache, struct vm_area_struct *, unsigned long, pte_t) | |
339 | ||
340 | #define update_mmu_cache(vma,addr,pte) BTFIXUP_CALL(update_mmu_cache)(vma,addr,pte) | |
341 | ||
342 | BTFIXUPDEF_CALL(void, sparc_mapiorange, unsigned int, unsigned long, | |
343 | unsigned long, unsigned int) | |
344 | BTFIXUPDEF_CALL(void, sparc_unmapiorange, unsigned long, unsigned int) | |
345 | #define sparc_mapiorange(bus,pa,va,len) BTFIXUP_CALL(sparc_mapiorange)(bus,pa,va,len) | |
346 | #define sparc_unmapiorange(va,len) BTFIXUP_CALL(sparc_unmapiorange)(va,len) | |
347 | ||
348 | extern int invalid_segment; | |
349 | ||
350 | /* Encode and de-code a swap entry */ | |
351 | BTFIXUPDEF_CALL(unsigned long, __swp_type, swp_entry_t) | |
352 | BTFIXUPDEF_CALL(unsigned long, __swp_offset, swp_entry_t) | |
353 | BTFIXUPDEF_CALL(swp_entry_t, __swp_entry, unsigned long, unsigned long) | |
354 | ||
355 | #define __swp_type(__x) BTFIXUP_CALL(__swp_type)(__x) | |
356 | #define __swp_offset(__x) BTFIXUP_CALL(__swp_offset)(__x) | |
357 | #define __swp_entry(__type,__off) BTFIXUP_CALL(__swp_entry)(__type,__off) | |
358 | ||
359 | #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) | |
360 | #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) | |
361 | ||
362 | /* file-offset-in-pte helpers */ | |
363 | BTFIXUPDEF_CALL(unsigned long, pte_to_pgoff, pte_t pte); | |
364 | BTFIXUPDEF_CALL(pte_t, pgoff_to_pte, unsigned long pgoff); | |
365 | ||
366 | #define pte_to_pgoff(pte) BTFIXUP_CALL(pte_to_pgoff)(pte) | |
367 | #define pgoff_to_pte(off) BTFIXUP_CALL(pgoff_to_pte)(off) | |
368 | ||
369 | /* | |
370 | * This is made a constant because mm/fremap.c required a constant. | |
371 | * Note that layout of these bits is different between sun4c.c and srmmu.c. | |
372 | */ | |
373 | #define PTE_FILE_MAX_BITS 24 | |
374 | ||
375 | /* | |
376 | */ | |
377 | struct ctx_list { | |
378 | struct ctx_list *next; | |
379 | struct ctx_list *prev; | |
380 | unsigned int ctx_number; | |
381 | struct mm_struct *ctx_mm; | |
382 | }; | |
383 | ||
384 | extern struct ctx_list *ctx_list_pool; /* Dynamically allocated */ | |
385 | extern struct ctx_list ctx_free; /* Head of free list */ | |
386 | extern struct ctx_list ctx_used; /* Head of used contexts list */ | |
387 | ||
388 | #define NO_CONTEXT -1 | |
389 | ||
3115624e | 390 | static inline void remove_from_ctx_list(struct ctx_list *entry) |
1da177e4 LT |
391 | { |
392 | entry->next->prev = entry->prev; | |
393 | entry->prev->next = entry->next; | |
394 | } | |
395 | ||
3115624e | 396 | static inline void add_to_ctx_list(struct ctx_list *head, struct ctx_list *entry) |
1da177e4 LT |
397 | { |
398 | entry->next = head; | |
399 | (entry->prev = head->prev)->next = entry; | |
400 | head->prev = entry; | |
401 | } | |
402 | #define add_to_free_ctxlist(entry) add_to_ctx_list(&ctx_free, entry) | |
403 | #define add_to_used_ctxlist(entry) add_to_ctx_list(&ctx_used, entry) | |
404 | ||
3115624e | 405 | static inline unsigned long |
1da177e4 LT |
406 | __get_phys (unsigned long addr) |
407 | { | |
408 | switch (sparc_cpu_model){ | |
409 | case sun4: | |
410 | case sun4c: | |
411 | return sun4c_get_pte (addr) << PAGE_SHIFT; | |
412 | case sun4m: | |
413 | case sun4d: | |
414 | return ((srmmu_get_pte (addr) & 0xffffff00) << 4); | |
415 | default: | |
416 | return 0; | |
417 | } | |
418 | } | |
419 | ||
3115624e | 420 | static inline int |
1da177e4 LT |
421 | __get_iospace (unsigned long addr) |
422 | { | |
423 | switch (sparc_cpu_model){ | |
424 | case sun4: | |
425 | case sun4c: | |
426 | return -1; /* Don't check iospace on sun4c */ | |
427 | case sun4m: | |
428 | case sun4d: | |
429 | return (srmmu_get_pte (addr) >> 28); | |
430 | default: | |
431 | return -1; | |
432 | } | |
433 | } | |
434 | ||
435 | extern unsigned long *sparc_valid_addr_bitmap; | |
436 | ||
437 | /* Needs to be defined here and not in linux/mm.h, as it is arch dependent */ | |
438 | #define kern_addr_valid(addr) \ | |
439 | (test_bit(__pa((unsigned long)(addr))>>20, sparc_valid_addr_bitmap)) | |
440 | ||
1da177e4 LT |
441 | extern int io_remap_pfn_range(struct vm_area_struct *vma, |
442 | unsigned long from, unsigned long pfn, | |
443 | unsigned long size, pgprot_t prot); | |
444 | ||
445 | /* | |
446 | * For sparc32&64, the pfn in io_remap_pfn_range() carries <iospace> in | |
447 | * its high 4 bits. These macros/functions put it there or get it from there. | |
448 | */ | |
449 | #define MK_IOSPACE_PFN(space, pfn) (pfn | (space << (BITS_PER_LONG - 4))) | |
450 | #define GET_IOSPACE(pfn) (pfn >> (BITS_PER_LONG - 4)) | |
451 | #define GET_PFN(pfn) (pfn & 0x0fffffffUL) | |
452 | ||
8dab5241 BH |
453 | #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS |
454 | #define ptep_set_access_flags(__vma, __address, __ptep, __entry, __dirty) \ | |
455 | ({ \ | |
456 | int __changed = !pte_same(*(__ptep), __entry); \ | |
457 | if (__changed) { \ | |
458 | set_pte_at((__vma)->vm_mm, (__address), __ptep, __entry); \ | |
459 | flush_tlb_page(__vma, __address); \ | |
460 | } \ | |
461 | (sparc_cpu_model == sun4c) || __changed; \ | |
462 | }) | |
463 | ||
1da177e4 LT |
464 | #include <asm-generic/pgtable.h> |
465 | ||
466 | #endif /* !(__ASSEMBLY__) */ | |
467 | ||
468 | /* We provide our own get_unmapped_area to cope with VA holes for userland */ | |
469 | #define HAVE_ARCH_UNMAPPED_AREA | |
470 | ||
471 | /* | |
472 | * No page table caches to initialise | |
473 | */ | |
474 | #define pgtable_cache_init() do { } while (0) | |
475 | ||
476 | #endif /* !(_SPARC_PGTABLE_H) */ |