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