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f5e706ad SR |
1 | #ifndef _SPARC_PGTABLE_H |
2 | #define _SPARC_PGTABLE_H | |
3 | ||
a439fe51 | 4 | /* asm/pgtable.h: Defines and functions used to work |
f5e706ad SR |
5 | * with Sparc page tables. |
6 | * | |
7 | * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) | |
8 | * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) | |
9 | */ | |
10 | ||
eb485d64 SR |
11 | #include <linux/const.h> |
12 | ||
f5e706ad SR |
13 | #ifndef __ASSEMBLY__ |
14 | #include <asm-generic/4level-fixup.h> | |
15 | ||
16 | #include <linux/spinlock.h> | |
17 | #include <linux/swap.h> | |
18 | #include <asm/types.h> | |
f5e706ad | 19 | #include <asm/pgtsun4c.h> |
f5e706ad SR |
20 | #include <asm/pgtsrmmu.h> |
21 | #include <asm/vac-ops.h> | |
22 | #include <asm/oplib.h> | |
23 | #include <asm/btfixup.h> | |
24 | #include <asm/system.h> | |
25 | ||
26 | ||
27 | struct vm_area_struct; | |
28 | struct page; | |
29 | ||
30 | extern void load_mmu(void); | |
31 | extern unsigned long calc_highpages(void); | |
32 | ||
33 | BTFIXUPDEF_SIMM13(pgdir_shift) | |
34 | BTFIXUPDEF_SETHI(pgdir_size) | |
35 | BTFIXUPDEF_SETHI(pgdir_mask) | |
36 | ||
37 | BTFIXUPDEF_SIMM13(ptrs_per_pmd) | |
38 | BTFIXUPDEF_SIMM13(ptrs_per_pgd) | |
39 | BTFIXUPDEF_SIMM13(user_ptrs_per_pgd) | |
40 | ||
41 | #define pte_ERROR(e) __builtin_trap() | |
42 | #define pmd_ERROR(e) __builtin_trap() | |
43 | #define pgd_ERROR(e) __builtin_trap() | |
44 | ||
45 | BTFIXUPDEF_INT(page_none) | |
46 | BTFIXUPDEF_INT(page_copy) | |
47 | BTFIXUPDEF_INT(page_readonly) | |
48 | BTFIXUPDEF_INT(page_kernel) | |
49 | ||
50 | #define PMD_SHIFT SUN4C_PMD_SHIFT | |
51 | #define PMD_SIZE (1UL << PMD_SHIFT) | |
52 | #define PMD_MASK (~(PMD_SIZE-1)) | |
53 | #define PMD_ALIGN(__addr) (((__addr) + ~PMD_MASK) & PMD_MASK) | |
54 | #define PGDIR_SHIFT BTFIXUP_SIMM13(pgdir_shift) | |
55 | #define PGDIR_SIZE BTFIXUP_SETHI(pgdir_size) | |
56 | #define PGDIR_MASK BTFIXUP_SETHI(pgdir_mask) | |
57 | #define PTRS_PER_PTE 1024 | |
58 | #define PTRS_PER_PMD BTFIXUP_SIMM13(ptrs_per_pmd) | |
59 | #define PTRS_PER_PGD BTFIXUP_SIMM13(ptrs_per_pgd) | |
60 | #define USER_PTRS_PER_PGD BTFIXUP_SIMM13(user_ptrs_per_pgd) | |
61 | #define FIRST_USER_ADDRESS 0 | |
62 | #define PTE_SIZE (PTRS_PER_PTE*4) | |
63 | ||
64 | #define PAGE_NONE __pgprot(BTFIXUP_INT(page_none)) | |
65 | extern pgprot_t PAGE_SHARED; | |
66 | #define PAGE_COPY __pgprot(BTFIXUP_INT(page_copy)) | |
67 | #define PAGE_READONLY __pgprot(BTFIXUP_INT(page_readonly)) | |
68 | ||
69 | extern unsigned long page_kernel; | |
70 | ||
71 | #ifdef MODULE | |
72 | #define PAGE_KERNEL page_kernel | |
73 | #else | |
74 | #define PAGE_KERNEL __pgprot(BTFIXUP_INT(page_kernel)) | |
75 | #endif | |
76 | ||
77 | /* Top-level page directory */ | |
78 | extern pgd_t swapper_pg_dir[1024]; | |
79 | ||
80 | extern void paging_init(void); | |
81 | ||
82 | /* Page table for 0-4MB for everybody, on the Sparc this | |
83 | * holds the same as on the i386. | |
84 | */ | |
85 | extern pte_t pg0[1024]; | |
86 | extern pte_t pg1[1024]; | |
87 | extern pte_t pg2[1024]; | |
88 | extern pte_t pg3[1024]; | |
89 | ||
90 | extern unsigned long ptr_in_current_pgd; | |
91 | ||
92 | /* Here is a trick, since mmap.c need the initializer elements for | |
93 | * protection_map[] to be constant at compile time, I set the following | |
94 | * to all zeros. I set it to the real values after I link in the | |
95 | * appropriate MMU page table routines at boot time. | |
96 | */ | |
97 | #define __P000 __pgprot(0) | |
98 | #define __P001 __pgprot(0) | |
99 | #define __P010 __pgprot(0) | |
100 | #define __P011 __pgprot(0) | |
101 | #define __P100 __pgprot(0) | |
102 | #define __P101 __pgprot(0) | |
103 | #define __P110 __pgprot(0) | |
104 | #define __P111 __pgprot(0) | |
105 | ||
106 | #define __S000 __pgprot(0) | |
107 | #define __S001 __pgprot(0) | |
108 | #define __S010 __pgprot(0) | |
109 | #define __S011 __pgprot(0) | |
110 | #define __S100 __pgprot(0) | |
111 | #define __S101 __pgprot(0) | |
112 | #define __S110 __pgprot(0) | |
113 | #define __S111 __pgprot(0) | |
114 | ||
115 | extern int num_contexts; | |
116 | ||
117 | /* First physical page can be anywhere, the following is needed so that | |
118 | * va-->pa and vice versa conversions work properly without performance | |
119 | * hit for all __pa()/__va() operations. | |
120 | */ | |
121 | extern unsigned long phys_base; | |
122 | extern unsigned long pfn_base; | |
123 | ||
124 | /* | |
125 | * BAD_PAGETABLE is used when we need a bogus page-table, while | |
126 | * BAD_PAGE is used for a bogus page. | |
127 | * | |
128 | * ZERO_PAGE is a global shared page that is always zero: used | |
129 | * for zero-mapped memory areas etc.. | |
130 | */ | |
131 | extern pte_t * __bad_pagetable(void); | |
132 | extern pte_t __bad_page(void); | |
133 | extern unsigned long empty_zero_page; | |
134 | ||
135 | #define BAD_PAGETABLE __bad_pagetable() | |
136 | #define BAD_PAGE __bad_page() | |
137 | #define ZERO_PAGE(vaddr) (virt_to_page(&empty_zero_page)) | |
138 | ||
139 | /* | |
140 | */ | |
141 | BTFIXUPDEF_CALL_CONST(struct page *, pmd_page, pmd_t) | |
142 | BTFIXUPDEF_CALL_CONST(unsigned long, pgd_page_vaddr, pgd_t) | |
143 | ||
144 | #define pmd_page(pmd) BTFIXUP_CALL(pmd_page)(pmd) | |
145 | #define pgd_page_vaddr(pgd) BTFIXUP_CALL(pgd_page_vaddr)(pgd) | |
146 | ||
f5e706ad SR |
147 | BTFIXUPDEF_CALL_CONST(int, pte_present, pte_t) |
148 | BTFIXUPDEF_CALL(void, pte_clear, pte_t *) | |
149 | ||
150 | static inline int pte_none(pte_t pte) | |
151 | { | |
c87fe1c0 | 152 | return !pte_val(pte); |
f5e706ad SR |
153 | } |
154 | ||
155 | #define pte_present(pte) BTFIXUP_CALL(pte_present)(pte) | |
156 | #define pte_clear(mm,addr,pte) BTFIXUP_CALL(pte_clear)(pte) | |
157 | ||
158 | BTFIXUPDEF_CALL_CONST(int, pmd_bad, pmd_t) | |
159 | BTFIXUPDEF_CALL_CONST(int, pmd_present, pmd_t) | |
160 | BTFIXUPDEF_CALL(void, pmd_clear, pmd_t *) | |
161 | ||
162 | static inline int pmd_none(pmd_t pmd) | |
163 | { | |
c87fe1c0 | 164 | return !pmd_val(pmd); |
f5e706ad SR |
165 | } |
166 | ||
167 | #define pmd_bad(pmd) BTFIXUP_CALL(pmd_bad)(pmd) | |
168 | #define pmd_present(pmd) BTFIXUP_CALL(pmd_present)(pmd) | |
169 | #define pmd_clear(pmd) BTFIXUP_CALL(pmd_clear)(pmd) | |
170 | ||
171 | BTFIXUPDEF_CALL_CONST(int, pgd_none, pgd_t) | |
172 | BTFIXUPDEF_CALL_CONST(int, pgd_bad, pgd_t) | |
173 | BTFIXUPDEF_CALL_CONST(int, pgd_present, pgd_t) | |
174 | BTFIXUPDEF_CALL(void, pgd_clear, pgd_t *) | |
175 | ||
176 | #define pgd_none(pgd) BTFIXUP_CALL(pgd_none)(pgd) | |
177 | #define pgd_bad(pgd) BTFIXUP_CALL(pgd_bad)(pgd) | |
178 | #define pgd_present(pgd) BTFIXUP_CALL(pgd_present)(pgd) | |
179 | #define pgd_clear(pgd) BTFIXUP_CALL(pgd_clear)(pgd) | |
180 | ||
181 | /* | |
182 | * The following only work if pte_present() is true. | |
183 | * Undefined behaviour if not.. | |
184 | */ | |
185 | BTFIXUPDEF_HALF(pte_writei) | |
186 | BTFIXUPDEF_HALF(pte_dirtyi) | |
187 | BTFIXUPDEF_HALF(pte_youngi) | |
188 | ||
189 | static int pte_write(pte_t pte) __attribute_const__; | |
190 | static inline int pte_write(pte_t pte) | |
191 | { | |
192 | return pte_val(pte) & BTFIXUP_HALF(pte_writei); | |
193 | } | |
194 | ||
195 | static int pte_dirty(pte_t pte) __attribute_const__; | |
196 | static inline int pte_dirty(pte_t pte) | |
197 | { | |
198 | return pte_val(pte) & BTFIXUP_HALF(pte_dirtyi); | |
199 | } | |
200 | ||
201 | static int pte_young(pte_t pte) __attribute_const__; | |
202 | static inline int pte_young(pte_t pte) | |
203 | { | |
204 | return pte_val(pte) & BTFIXUP_HALF(pte_youngi); | |
205 | } | |
206 | ||
207 | /* | |
208 | * The following only work if pte_present() is not true. | |
209 | */ | |
210 | BTFIXUPDEF_HALF(pte_filei) | |
211 | ||
212 | static int pte_file(pte_t pte) __attribute_const__; | |
213 | static inline int pte_file(pte_t pte) | |
214 | { | |
215 | return pte_val(pte) & BTFIXUP_HALF(pte_filei); | |
216 | } | |
217 | ||
218 | static inline int pte_special(pte_t pte) | |
219 | { | |
220 | return 0; | |
221 | } | |
222 | ||
223 | /* | |
224 | */ | |
225 | BTFIXUPDEF_HALF(pte_wrprotecti) | |
226 | BTFIXUPDEF_HALF(pte_mkcleani) | |
227 | BTFIXUPDEF_HALF(pte_mkoldi) | |
228 | ||
229 | static pte_t pte_wrprotect(pte_t pte) __attribute_const__; | |
230 | static inline pte_t pte_wrprotect(pte_t pte) | |
231 | { | |
232 | return __pte(pte_val(pte) & ~BTFIXUP_HALF(pte_wrprotecti)); | |
233 | } | |
234 | ||
235 | static pte_t pte_mkclean(pte_t pte) __attribute_const__; | |
236 | static inline pte_t pte_mkclean(pte_t pte) | |
237 | { | |
238 | return __pte(pte_val(pte) & ~BTFIXUP_HALF(pte_mkcleani)); | |
239 | } | |
240 | ||
241 | static pte_t pte_mkold(pte_t pte) __attribute_const__; | |
242 | static inline pte_t pte_mkold(pte_t pte) | |
243 | { | |
244 | return __pte(pte_val(pte) & ~BTFIXUP_HALF(pte_mkoldi)); | |
245 | } | |
246 | ||
247 | BTFIXUPDEF_CALL_CONST(pte_t, pte_mkwrite, pte_t) | |
248 | BTFIXUPDEF_CALL_CONST(pte_t, pte_mkdirty, pte_t) | |
249 | BTFIXUPDEF_CALL_CONST(pte_t, pte_mkyoung, pte_t) | |
250 | ||
251 | #define pte_mkwrite(pte) BTFIXUP_CALL(pte_mkwrite)(pte) | |
252 | #define pte_mkdirty(pte) BTFIXUP_CALL(pte_mkdirty)(pte) | |
253 | #define pte_mkyoung(pte) BTFIXUP_CALL(pte_mkyoung)(pte) | |
254 | ||
255 | #define pte_mkspecial(pte) (pte) | |
256 | ||
257 | #define pfn_pte(pfn, prot) mk_pte(pfn_to_page(pfn), prot) | |
258 | ||
259 | BTFIXUPDEF_CALL(unsigned long, pte_pfn, pte_t) | |
260 | #define pte_pfn(pte) BTFIXUP_CALL(pte_pfn)(pte) | |
261 | #define pte_page(pte) pfn_to_page(pte_pfn(pte)) | |
262 | ||
263 | /* | |
264 | * Conversion functions: convert a page and protection to a page entry, | |
265 | * and a page entry and page directory to the page they refer to. | |
266 | */ | |
267 | BTFIXUPDEF_CALL_CONST(pte_t, mk_pte, struct page *, pgprot_t) | |
268 | ||
269 | BTFIXUPDEF_CALL_CONST(pte_t, mk_pte_phys, unsigned long, pgprot_t) | |
270 | BTFIXUPDEF_CALL_CONST(pte_t, mk_pte_io, unsigned long, pgprot_t, int) | |
271 | BTFIXUPDEF_CALL_CONST(pgprot_t, pgprot_noncached, pgprot_t) | |
272 | ||
273 | #define mk_pte(page,pgprot) BTFIXUP_CALL(mk_pte)(page,pgprot) | |
274 | #define mk_pte_phys(page,pgprot) BTFIXUP_CALL(mk_pte_phys)(page,pgprot) | |
275 | #define mk_pte_io(page,pgprot,space) BTFIXUP_CALL(mk_pte_io)(page,pgprot,space) | |
276 | ||
277 | #define pgprot_noncached(pgprot) BTFIXUP_CALL(pgprot_noncached)(pgprot) | |
278 | ||
279 | BTFIXUPDEF_INT(pte_modify_mask) | |
280 | ||
281 | static pte_t pte_modify(pte_t pte, pgprot_t newprot) __attribute_const__; | |
282 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) | |
283 | { | |
284 | return __pte((pte_val(pte) & BTFIXUP_INT(pte_modify_mask)) | | |
285 | pgprot_val(newprot)); | |
286 | } | |
287 | ||
288 | #define pgd_index(address) ((address) >> PGDIR_SHIFT) | |
289 | ||
290 | /* to find an entry in a page-table-directory */ | |
291 | #define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address)) | |
292 | ||
293 | /* to find an entry in a kernel page-table-directory */ | |
294 | #define pgd_offset_k(address) pgd_offset(&init_mm, address) | |
295 | ||
296 | /* Find an entry in the second-level page table.. */ | |
297 | BTFIXUPDEF_CALL(pmd_t *, pmd_offset, pgd_t *, unsigned long) | |
298 | #define pmd_offset(dir,addr) BTFIXUP_CALL(pmd_offset)(dir,addr) | |
299 | ||
300 | /* Find an entry in the third-level page table.. */ | |
301 | BTFIXUPDEF_CALL(pte_t *, pte_offset_kernel, pmd_t *, unsigned long) | |
302 | #define pte_offset_kernel(dir,addr) BTFIXUP_CALL(pte_offset_kernel)(dir,addr) | |
303 | ||
304 | /* | |
305 | * This shortcut works on sun4m (and sun4d) because the nocache area is static, | |
306 | * and sun4c is guaranteed to have no highmem anyway. | |
307 | */ | |
308 | #define pte_offset_map(d, a) pte_offset_kernel(d,a) | |
f5e706ad | 309 | #define pte_unmap(pte) do{}while(0) |
f5e706ad SR |
310 | |
311 | /* Certain architectures need to do special things when pte's | |
312 | * within a page table are directly modified. Thus, the following | |
313 | * hook is made available. | |
314 | */ | |
315 | ||
316 | BTFIXUPDEF_CALL(void, set_pte, pte_t *, pte_t) | |
317 | ||
318 | #define set_pte(ptep,pteval) BTFIXUP_CALL(set_pte)(ptep,pteval) | |
319 | #define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval) | |
320 | ||
321 | struct seq_file; | |
322 | BTFIXUPDEF_CALL(void, mmu_info, struct seq_file *) | |
323 | ||
324 | #define mmu_info(p) BTFIXUP_CALL(mmu_info)(p) | |
325 | ||
326 | /* Fault handler stuff... */ | |
327 | #define FAULT_CODE_PROT 0x1 | |
328 | #define FAULT_CODE_WRITE 0x2 | |
329 | #define FAULT_CODE_USER 0x4 | |
330 | ||
4b3073e1 | 331 | BTFIXUPDEF_CALL(void, update_mmu_cache, struct vm_area_struct *, unsigned long, pte_t *) |
f5e706ad | 332 | |
4b3073e1 | 333 | #define update_mmu_cache(vma,addr,ptep) BTFIXUP_CALL(update_mmu_cache)(vma,addr,ptep) |
f5e706ad SR |
334 | |
335 | BTFIXUPDEF_CALL(void, sparc_mapiorange, unsigned int, unsigned long, | |
336 | unsigned long, unsigned int) | |
337 | BTFIXUPDEF_CALL(void, sparc_unmapiorange, unsigned long, unsigned int) | |
338 | #define sparc_mapiorange(bus,pa,va,len) BTFIXUP_CALL(sparc_mapiorange)(bus,pa,va,len) | |
339 | #define sparc_unmapiorange(va,len) BTFIXUP_CALL(sparc_unmapiorange)(va,len) | |
340 | ||
341 | extern int invalid_segment; | |
342 | ||
343 | /* Encode and de-code a swap entry */ | |
344 | BTFIXUPDEF_CALL(unsigned long, __swp_type, swp_entry_t) | |
345 | BTFIXUPDEF_CALL(unsigned long, __swp_offset, swp_entry_t) | |
346 | BTFIXUPDEF_CALL(swp_entry_t, __swp_entry, unsigned long, unsigned long) | |
347 | ||
348 | #define __swp_type(__x) BTFIXUP_CALL(__swp_type)(__x) | |
349 | #define __swp_offset(__x) BTFIXUP_CALL(__swp_offset)(__x) | |
350 | #define __swp_entry(__type,__off) BTFIXUP_CALL(__swp_entry)(__type,__off) | |
351 | ||
352 | #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) | |
353 | #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) | |
354 | ||
355 | /* file-offset-in-pte helpers */ | |
356 | BTFIXUPDEF_CALL(unsigned long, pte_to_pgoff, pte_t pte); | |
357 | BTFIXUPDEF_CALL(pte_t, pgoff_to_pte, unsigned long pgoff); | |
358 | ||
359 | #define pte_to_pgoff(pte) BTFIXUP_CALL(pte_to_pgoff)(pte) | |
360 | #define pgoff_to_pte(off) BTFIXUP_CALL(pgoff_to_pte)(off) | |
361 | ||
362 | /* | |
363 | * This is made a constant because mm/fremap.c required a constant. | |
364 | * Note that layout of these bits is different between sun4c.c and srmmu.c. | |
365 | */ | |
366 | #define PTE_FILE_MAX_BITS 24 | |
367 | ||
368 | /* | |
369 | */ | |
370 | struct ctx_list { | |
371 | struct ctx_list *next; | |
372 | struct ctx_list *prev; | |
373 | unsigned int ctx_number; | |
374 | struct mm_struct *ctx_mm; | |
375 | }; | |
376 | ||
377 | extern struct ctx_list *ctx_list_pool; /* Dynamically allocated */ | |
378 | extern struct ctx_list ctx_free; /* Head of free list */ | |
379 | extern struct ctx_list ctx_used; /* Head of used contexts list */ | |
380 | ||
381 | #define NO_CONTEXT -1 | |
382 | ||
383 | static inline void remove_from_ctx_list(struct ctx_list *entry) | |
384 | { | |
385 | entry->next->prev = entry->prev; | |
386 | entry->prev->next = entry->next; | |
387 | } | |
388 | ||
389 | static inline void add_to_ctx_list(struct ctx_list *head, struct ctx_list *entry) | |
390 | { | |
391 | entry->next = head; | |
392 | (entry->prev = head->prev)->next = entry; | |
393 | head->prev = entry; | |
394 | } | |
395 | #define add_to_free_ctxlist(entry) add_to_ctx_list(&ctx_free, entry) | |
396 | #define add_to_used_ctxlist(entry) add_to_ctx_list(&ctx_used, entry) | |
397 | ||
398 | static inline unsigned long | |
399 | __get_phys (unsigned long addr) | |
400 | { | |
401 | switch (sparc_cpu_model){ | |
402 | case sun4: | |
403 | case sun4c: | |
404 | return sun4c_get_pte (addr) << PAGE_SHIFT; | |
405 | case sun4m: | |
406 | case sun4d: | |
407 | return ((srmmu_get_pte (addr) & 0xffffff00) << 4); | |
408 | default: | |
409 | return 0; | |
410 | } | |
411 | } | |
412 | ||
413 | static inline int | |
414 | __get_iospace (unsigned long addr) | |
415 | { | |
416 | switch (sparc_cpu_model){ | |
417 | case sun4: | |
418 | case sun4c: | |
419 | return -1; /* Don't check iospace on sun4c */ | |
420 | case sun4m: | |
421 | case sun4d: | |
422 | return (srmmu_get_pte (addr) >> 28); | |
423 | default: | |
424 | return -1; | |
425 | } | |
426 | } | |
427 | ||
428 | extern unsigned long *sparc_valid_addr_bitmap; | |
429 | ||
430 | /* Needs to be defined here and not in linux/mm.h, as it is arch dependent */ | |
431 | #define kern_addr_valid(addr) \ | |
432 | (test_bit(__pa((unsigned long)(addr))>>20, sparc_valid_addr_bitmap)) | |
433 | ||
f5e706ad SR |
434 | /* |
435 | * For sparc32&64, the pfn in io_remap_pfn_range() carries <iospace> in | |
436 | * its high 4 bits. These macros/functions put it there or get it from there. | |
437 | */ | |
438 | #define MK_IOSPACE_PFN(space, pfn) (pfn | (space << (BITS_PER_LONG - 4))) | |
439 | #define GET_IOSPACE(pfn) (pfn >> (BITS_PER_LONG - 4)) | |
440 | #define GET_PFN(pfn) (pfn & 0x0fffffffUL) | |
441 | ||
3e37fd31 DM |
442 | extern int remap_pfn_range(struct vm_area_struct *, unsigned long, unsigned long, |
443 | unsigned long, pgprot_t); | |
444 | ||
445 | static inline int io_remap_pfn_range(struct vm_area_struct *vma, | |
446 | unsigned long from, unsigned long pfn, | |
447 | unsigned long size, pgprot_t prot) | |
448 | { | |
449 | unsigned long long offset, space, phys_base; | |
450 | ||
451 | offset = ((unsigned long long) GET_PFN(pfn)) << PAGE_SHIFT; | |
452 | space = GET_IOSPACE(pfn); | |
453 | phys_base = offset | (space << 32ULL); | |
454 | ||
455 | return remap_pfn_range(vma, from, phys_base >> PAGE_SHIFT, size, prot); | |
456 | } | |
457 | ||
f5e706ad SR |
458 | #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS |
459 | #define ptep_set_access_flags(__vma, __address, __ptep, __entry, __dirty) \ | |
460 | ({ \ | |
461 | int __changed = !pte_same(*(__ptep), __entry); \ | |
462 | if (__changed) { \ | |
463 | set_pte_at((__vma)->vm_mm, (__address), __ptep, __entry); \ | |
464 | flush_tlb_page(__vma, __address); \ | |
465 | } \ | |
466 | (sparc_cpu_model == sun4c) || __changed; \ | |
467 | }) | |
468 | ||
469 | #include <asm-generic/pgtable.h> | |
470 | ||
471 | #endif /* !(__ASSEMBLY__) */ | |
472 | ||
eb485d64 | 473 | #define VMALLOC_START _AC(0xfe600000,UL) |
f5e706ad | 474 | /* XXX Alter this when I get around to fixing sun4c - Anton */ |
eb485d64 | 475 | #define VMALLOC_END _AC(0xffc00000,UL) |
f5e706ad SR |
476 | |
477 | ||
478 | /* We provide our own get_unmapped_area to cope with VA holes for userland */ | |
479 | #define HAVE_ARCH_UNMAPPED_AREA | |
480 | ||
481 | /* | |
482 | * No page table caches to initialise | |
483 | */ | |
484 | #define pgtable_cache_init() do { } while (0) | |
485 | ||
486 | #endif /* !(_SPARC_PGTABLE_H) */ |