diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-sparc/pgtable.h |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/asm-sparc/pgtable.h')
-rw-r--r-- | include/asm-sparc/pgtable.h | 465 |
1 files changed, 465 insertions, 0 deletions
diff --git a/include/asm-sparc/pgtable.h b/include/asm-sparc/pgtable.h new file mode 100644 index 000000000000..373a6c327590 --- /dev/null +++ b/include/asm-sparc/pgtable.h | |||
@@ -0,0 +1,465 @@ | |||
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 | |||
14 | #include <linux/config.h> | ||
15 | #include <linux/spinlock.h> | ||
16 | #include <linux/swap.h> | ||
17 | #include <asm/types.h> | ||
18 | #ifdef CONFIG_SUN4 | ||
19 | #include <asm/pgtsun4.h> | ||
20 | #else | ||
21 | #include <asm/pgtsun4c.h> | ||
22 | #endif | ||
23 | #include <asm/pgtsrmmu.h> | ||
24 | #include <asm/vac-ops.h> | ||
25 | #include <asm/oplib.h> | ||
26 | #include <asm/btfixup.h> | ||
27 | #include <asm/system.h> | ||
28 | |||
29 | #ifndef __ASSEMBLY__ | ||
30 | |||
31 | struct vm_area_struct; | ||
32 | struct page; | ||
33 | |||
34 | extern void load_mmu(void); | ||
35 | extern unsigned long calc_highpages(void); | ||
36 | |||
37 | BTFIXUPDEF_SIMM13(pgdir_shift) | ||
38 | BTFIXUPDEF_SETHI(pgdir_size) | ||
39 | BTFIXUPDEF_SETHI(pgdir_mask) | ||
40 | |||
41 | BTFIXUPDEF_SIMM13(ptrs_per_pmd) | ||
42 | BTFIXUPDEF_SIMM13(ptrs_per_pgd) | ||
43 | BTFIXUPDEF_SIMM13(user_ptrs_per_pgd) | ||
44 | |||
45 | #define pte_ERROR(e) __builtin_trap() | ||
46 | #define pmd_ERROR(e) __builtin_trap() | ||
47 | #define pgd_ERROR(e) __builtin_trap() | ||
48 | |||
49 | BTFIXUPDEF_INT(page_none) | ||
50 | BTFIXUPDEF_INT(page_shared) | ||
51 | BTFIXUPDEF_INT(page_copy) | ||
52 | BTFIXUPDEF_INT(page_readonly) | ||
53 | BTFIXUPDEF_INT(page_kernel) | ||
54 | |||
55 | #define PMD_SHIFT SUN4C_PMD_SHIFT | ||
56 | #define PMD_SIZE (1UL << PMD_SHIFT) | ||
57 | #define PMD_MASK (~(PMD_SIZE-1)) | ||
58 | #define PMD_ALIGN(__addr) (((__addr) + ~PMD_MASK) & PMD_MASK) | ||
59 | #define PGDIR_SHIFT BTFIXUP_SIMM13(pgdir_shift) | ||
60 | #define PGDIR_SIZE BTFIXUP_SETHI(pgdir_size) | ||
61 | #define PGDIR_MASK BTFIXUP_SETHI(pgdir_mask) | ||
62 | #define PTRS_PER_PTE 1024 | ||
63 | #define PTRS_PER_PMD BTFIXUP_SIMM13(ptrs_per_pmd) | ||
64 | #define PTRS_PER_PGD BTFIXUP_SIMM13(ptrs_per_pgd) | ||
65 | #define USER_PTRS_PER_PGD BTFIXUP_SIMM13(user_ptrs_per_pgd) | ||
66 | #define FIRST_USER_PGD_NR 0 | ||
67 | #define PTE_SIZE (PTRS_PER_PTE*4) | ||
68 | |||
69 | #define PAGE_NONE __pgprot(BTFIXUP_INT(page_none)) | ||
70 | #define PAGE_SHARED __pgprot(BTFIXUP_INT(page_shared)) | ||
71 | #define PAGE_COPY __pgprot(BTFIXUP_INT(page_copy)) | ||
72 | #define PAGE_READONLY __pgprot(BTFIXUP_INT(page_readonly)) | ||
73 | |||
74 | extern unsigned long page_kernel; | ||
75 | |||
76 | #ifdef MODULE | ||
77 | #define PAGE_KERNEL page_kernel | ||
78 | #else | ||
79 | #define PAGE_KERNEL __pgprot(BTFIXUP_INT(page_kernel)) | ||
80 | #endif | ||
81 | |||
82 | /* Top-level page directory */ | ||
83 | extern pgd_t swapper_pg_dir[1024]; | ||
84 | |||
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) | ||
145 | BTFIXUPDEF_CALL_CONST(unsigned long, pgd_page, pgd_t) | ||
146 | |||
147 | #define pmd_page(pmd) BTFIXUP_CALL(pmd_page)(pmd) | ||
148 | #define pgd_page(pgd) BTFIXUP_CALL(pgd_page)(pgd) | ||
149 | |||
150 | BTFIXUPDEF_SETHI(none_mask) | ||
151 | BTFIXUPDEF_CALL_CONST(int, pte_present, pte_t) | ||
152 | BTFIXUPDEF_CALL(void, pte_clear, pte_t *) | ||
153 | BTFIXUPDEF_CALL(int, pte_read, pte_t) | ||
154 | |||
155 | extern __inline__ int pte_none(pte_t pte) | ||
156 | { | ||
157 | return !(pte_val(pte) & ~BTFIXUP_SETHI(none_mask)); | ||
158 | } | ||
159 | |||
160 | #define pte_present(pte) BTFIXUP_CALL(pte_present)(pte) | ||
161 | #define pte_clear(mm,addr,pte) BTFIXUP_CALL(pte_clear)(pte) | ||
162 | #define pte_read(pte) BTFIXUP_CALL(pte_read)(pte) | ||
163 | |||
164 | BTFIXUPDEF_CALL_CONST(int, pmd_bad, pmd_t) | ||
165 | BTFIXUPDEF_CALL_CONST(int, pmd_present, pmd_t) | ||
166 | BTFIXUPDEF_CALL(void, pmd_clear, pmd_t *) | ||
167 | |||
168 | extern __inline__ int pmd_none(pmd_t pmd) | ||
169 | { | ||
170 | return !(pmd_val(pmd) & ~BTFIXUP_SETHI(none_mask)); | ||
171 | } | ||
172 | |||
173 | #define pmd_bad(pmd) BTFIXUP_CALL(pmd_bad)(pmd) | ||
174 | #define pmd_present(pmd) BTFIXUP_CALL(pmd_present)(pmd) | ||
175 | #define pmd_clear(pmd) BTFIXUP_CALL(pmd_clear)(pmd) | ||
176 | |||
177 | BTFIXUPDEF_CALL_CONST(int, pgd_none, pgd_t) | ||
178 | BTFIXUPDEF_CALL_CONST(int, pgd_bad, pgd_t) | ||
179 | BTFIXUPDEF_CALL_CONST(int, pgd_present, pgd_t) | ||
180 | BTFIXUPDEF_CALL(void, pgd_clear, pgd_t *) | ||
181 | |||
182 | #define pgd_none(pgd) BTFIXUP_CALL(pgd_none)(pgd) | ||
183 | #define pgd_bad(pgd) BTFIXUP_CALL(pgd_bad)(pgd) | ||
184 | #define pgd_present(pgd) BTFIXUP_CALL(pgd_present)(pgd) | ||
185 | #define pgd_clear(pgd) BTFIXUP_CALL(pgd_clear)(pgd) | ||
186 | |||
187 | /* | ||
188 | * The following only work if pte_present() is true. | ||
189 | * Undefined behaviour if not.. | ||
190 | */ | ||
191 | BTFIXUPDEF_HALF(pte_writei) | ||
192 | BTFIXUPDEF_HALF(pte_dirtyi) | ||
193 | BTFIXUPDEF_HALF(pte_youngi) | ||
194 | |||
195 | extern int pte_write(pte_t pte) __attribute_const__; | ||
196 | extern __inline__ int pte_write(pte_t pte) | ||
197 | { | ||
198 | return pte_val(pte) & BTFIXUP_HALF(pte_writei); | ||
199 | } | ||
200 | |||
201 | extern int pte_dirty(pte_t pte) __attribute_const__; | ||
202 | extern __inline__ int pte_dirty(pte_t pte) | ||
203 | { | ||
204 | return pte_val(pte) & BTFIXUP_HALF(pte_dirtyi); | ||
205 | } | ||
206 | |||
207 | extern int pte_young(pte_t pte) __attribute_const__; | ||
208 | extern __inline__ int pte_young(pte_t pte) | ||
209 | { | ||
210 | return pte_val(pte) & BTFIXUP_HALF(pte_youngi); | ||
211 | } | ||
212 | |||
213 | /* | ||
214 | * The following only work if pte_present() is not true. | ||
215 | */ | ||
216 | BTFIXUPDEF_HALF(pte_filei) | ||
217 | |||
218 | extern int pte_file(pte_t pte) __attribute_const__; | ||
219 | extern __inline__ int pte_file(pte_t pte) | ||
220 | { | ||
221 | return pte_val(pte) & BTFIXUP_HALF(pte_filei); | ||
222 | } | ||
223 | |||
224 | /* | ||
225 | */ | ||
226 | BTFIXUPDEF_HALF(pte_wrprotecti) | ||
227 | BTFIXUPDEF_HALF(pte_mkcleani) | ||
228 | BTFIXUPDEF_HALF(pte_mkoldi) | ||
229 | |||
230 | extern pte_t pte_wrprotect(pte_t pte) __attribute_const__; | ||
231 | extern __inline__ pte_t pte_wrprotect(pte_t pte) | ||
232 | { | ||
233 | return __pte(pte_val(pte) & ~BTFIXUP_HALF(pte_wrprotecti)); | ||
234 | } | ||
235 | |||
236 | extern pte_t pte_mkclean(pte_t pte) __attribute_const__; | ||
237 | extern __inline__ pte_t pte_mkclean(pte_t pte) | ||
238 | { | ||
239 | return __pte(pte_val(pte) & ~BTFIXUP_HALF(pte_mkcleani)); | ||
240 | } | ||
241 | |||
242 | extern pte_t pte_mkold(pte_t pte) __attribute_const__; | ||
243 | extern __inline__ pte_t pte_mkold(pte_t pte) | ||
244 | { | ||
245 | return __pte(pte_val(pte) & ~BTFIXUP_HALF(pte_mkoldi)); | ||
246 | } | ||
247 | |||
248 | BTFIXUPDEF_CALL_CONST(pte_t, pte_mkwrite, pte_t) | ||
249 | BTFIXUPDEF_CALL_CONST(pte_t, pte_mkdirty, pte_t) | ||
250 | BTFIXUPDEF_CALL_CONST(pte_t, pte_mkyoung, pte_t) | ||
251 | |||
252 | #define pte_mkwrite(pte) BTFIXUP_CALL(pte_mkwrite)(pte) | ||
253 | #define pte_mkdirty(pte) BTFIXUP_CALL(pte_mkdirty)(pte) | ||
254 | #define pte_mkyoung(pte) BTFIXUP_CALL(pte_mkyoung)(pte) | ||
255 | |||
256 | #define page_pte_prot(page, prot) mk_pte(page, prot) | ||
257 | #define page_pte(page) mk_pte(page, __pgprot(0)) | ||
258 | #define pfn_pte(pfn, prot) mk_pte(pfn_to_page(pfn), prot) | ||
259 | |||
260 | BTFIXUPDEF_CALL(unsigned long, pte_pfn, pte_t) | ||
261 | #define pte_pfn(pte) BTFIXUP_CALL(pte_pfn)(pte) | ||
262 | #define pte_page(pte) pfn_to_page(pte_pfn(pte)) | ||
263 | |||
264 | /* | ||
265 | * Conversion functions: convert a page and protection to a page entry, | ||
266 | * and a page entry and page directory to the page they refer to. | ||
267 | */ | ||
268 | BTFIXUPDEF_CALL_CONST(pte_t, mk_pte, struct page *, pgprot_t) | ||
269 | |||
270 | BTFIXUPDEF_CALL_CONST(pte_t, mk_pte_phys, unsigned long, pgprot_t) | ||
271 | BTFIXUPDEF_CALL_CONST(pte_t, mk_pte_io, unsigned long, pgprot_t, int) | ||
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 | BTFIXUPDEF_INT(pte_modify_mask) | ||
278 | |||
279 | extern pte_t pte_modify(pte_t pte, pgprot_t newprot) __attribute_const__; | ||
280 | extern __inline__ pte_t pte_modify(pte_t pte, pgprot_t newprot) | ||
281 | { | ||
282 | return __pte((pte_val(pte) & BTFIXUP_INT(pte_modify_mask)) | | ||
283 | pgprot_val(newprot)); | ||
284 | } | ||
285 | |||
286 | #define pgd_index(address) ((address) >> PGDIR_SHIFT) | ||
287 | |||
288 | /* to find an entry in a page-table-directory */ | ||
289 | #define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address)) | ||
290 | |||
291 | /* to find an entry in a kernel page-table-directory */ | ||
292 | #define pgd_offset_k(address) pgd_offset(&init_mm, address) | ||
293 | |||
294 | /* Find an entry in the second-level page table.. */ | ||
295 | BTFIXUPDEF_CALL(pmd_t *, pmd_offset, pgd_t *, unsigned long) | ||
296 | #define pmd_offset(dir,addr) BTFIXUP_CALL(pmd_offset)(dir,addr) | ||
297 | |||
298 | /* Find an entry in the third-level page table.. */ | ||
299 | BTFIXUPDEF_CALL(pte_t *, pte_offset_kernel, pmd_t *, unsigned long) | ||
300 | #define pte_offset_kernel(dir,addr) BTFIXUP_CALL(pte_offset_kernel)(dir,addr) | ||
301 | |||
302 | /* | ||
303 | * This shortcut works on sun4m (and sun4d) because the nocache area is static, | ||
304 | * and sun4c is guaranteed to have no highmem anyway. | ||
305 | */ | ||
306 | #define pte_offset_map(d, a) pte_offset_kernel(d,a) | ||
307 | #define pte_offset_map_nested(d, a) pte_offset_kernel(d,a) | ||
308 | |||
309 | #define pte_unmap(pte) do{}while(0) | ||
310 | #define pte_unmap_nested(pte) do{}while(0) | ||
311 | |||
312 | /* The permissions for pgprot_val to make a page mapped on the obio space */ | ||
313 | extern unsigned int pg_iobits; | ||
314 | |||
315 | /* Certain architectures need to do special things when pte's | ||
316 | * within a page table are directly modified. Thus, the following | ||
317 | * hook is made available. | ||
318 | */ | ||
319 | |||
320 | BTFIXUPDEF_CALL(void, set_pte, pte_t *, pte_t) | ||
321 | |||
322 | #define set_pte(ptep,pteval) BTFIXUP_CALL(set_pte)(ptep,pteval) | ||
323 | #define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval) | ||
324 | |||
325 | struct seq_file; | ||
326 | BTFIXUPDEF_CALL(void, mmu_info, struct seq_file *) | ||
327 | |||
328 | #define mmu_info(p) BTFIXUP_CALL(mmu_info)(p) | ||
329 | |||
330 | /* Fault handler stuff... */ | ||
331 | #define FAULT_CODE_PROT 0x1 | ||
332 | #define FAULT_CODE_WRITE 0x2 | ||
333 | #define FAULT_CODE_USER 0x4 | ||
334 | |||
335 | BTFIXUPDEF_CALL(void, update_mmu_cache, struct vm_area_struct *, unsigned long, pte_t) | ||
336 | |||
337 | #define update_mmu_cache(vma,addr,pte) BTFIXUP_CALL(update_mmu_cache)(vma,addr,pte) | ||
338 | |||
339 | BTFIXUPDEF_CALL(void, sparc_mapiorange, unsigned int, unsigned long, | ||
340 | unsigned long, unsigned int) | ||
341 | BTFIXUPDEF_CALL(void, sparc_unmapiorange, unsigned long, unsigned int) | ||
342 | #define sparc_mapiorange(bus,pa,va,len) BTFIXUP_CALL(sparc_mapiorange)(bus,pa,va,len) | ||
343 | #define sparc_unmapiorange(va,len) BTFIXUP_CALL(sparc_unmapiorange)(va,len) | ||
344 | |||
345 | extern int invalid_segment; | ||
346 | |||
347 | /* Encode and de-code a swap entry */ | ||
348 | BTFIXUPDEF_CALL(unsigned long, __swp_type, swp_entry_t) | ||
349 | BTFIXUPDEF_CALL(unsigned long, __swp_offset, swp_entry_t) | ||
350 | BTFIXUPDEF_CALL(swp_entry_t, __swp_entry, unsigned long, unsigned long) | ||
351 | |||
352 | #define __swp_type(__x) BTFIXUP_CALL(__swp_type)(__x) | ||
353 | #define __swp_offset(__x) BTFIXUP_CALL(__swp_offset)(__x) | ||
354 | #define __swp_entry(__type,__off) BTFIXUP_CALL(__swp_entry)(__type,__off) | ||
355 | |||
356 | #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) | ||
357 | #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) | ||
358 | |||
359 | /* file-offset-in-pte helpers */ | ||
360 | BTFIXUPDEF_CALL(unsigned long, pte_to_pgoff, pte_t pte); | ||
361 | BTFIXUPDEF_CALL(pte_t, pgoff_to_pte, unsigned long pgoff); | ||
362 | |||
363 | #define pte_to_pgoff(pte) BTFIXUP_CALL(pte_to_pgoff)(pte) | ||
364 | #define pgoff_to_pte(off) BTFIXUP_CALL(pgoff_to_pte)(off) | ||
365 | |||
366 | /* | ||
367 | * This is made a constant because mm/fremap.c required a constant. | ||
368 | * Note that layout of these bits is different between sun4c.c and srmmu.c. | ||
369 | */ | ||
370 | #define PTE_FILE_MAX_BITS 24 | ||
371 | |||
372 | /* | ||
373 | */ | ||
374 | struct ctx_list { | ||
375 | struct ctx_list *next; | ||
376 | struct ctx_list *prev; | ||
377 | unsigned int ctx_number; | ||
378 | struct mm_struct *ctx_mm; | ||
379 | }; | ||
380 | |||
381 | extern struct ctx_list *ctx_list_pool; /* Dynamically allocated */ | ||
382 | extern struct ctx_list ctx_free; /* Head of free list */ | ||
383 | extern struct ctx_list ctx_used; /* Head of used contexts list */ | ||
384 | |||
385 | #define NO_CONTEXT -1 | ||
386 | |||
387 | extern __inline__ void remove_from_ctx_list(struct ctx_list *entry) | ||
388 | { | ||
389 | entry->next->prev = entry->prev; | ||
390 | entry->prev->next = entry->next; | ||
391 | } | ||
392 | |||
393 | extern __inline__ void add_to_ctx_list(struct ctx_list *head, struct ctx_list *entry) | ||
394 | { | ||
395 | entry->next = head; | ||
396 | (entry->prev = head->prev)->next = entry; | ||
397 | head->prev = entry; | ||
398 | } | ||
399 | #define add_to_free_ctxlist(entry) add_to_ctx_list(&ctx_free, entry) | ||
400 | #define add_to_used_ctxlist(entry) add_to_ctx_list(&ctx_used, entry) | ||
401 | |||
402 | extern __inline__ unsigned long | ||
403 | __get_phys (unsigned long addr) | ||
404 | { | ||
405 | switch (sparc_cpu_model){ | ||
406 | case sun4: | ||
407 | case sun4c: | ||
408 | return sun4c_get_pte (addr) << PAGE_SHIFT; | ||
409 | case sun4m: | ||
410 | case sun4d: | ||
411 | return ((srmmu_get_pte (addr) & 0xffffff00) << 4); | ||
412 | default: | ||
413 | return 0; | ||
414 | } | ||
415 | } | ||
416 | |||
417 | extern __inline__ int | ||
418 | __get_iospace (unsigned long addr) | ||
419 | { | ||
420 | switch (sparc_cpu_model){ | ||
421 | case sun4: | ||
422 | case sun4c: | ||
423 | return -1; /* Don't check iospace on sun4c */ | ||
424 | case sun4m: | ||
425 | case sun4d: | ||
426 | return (srmmu_get_pte (addr) >> 28); | ||
427 | default: | ||
428 | return -1; | ||
429 | } | ||
430 | } | ||
431 | |||
432 | extern unsigned long *sparc_valid_addr_bitmap; | ||
433 | |||
434 | /* Needs to be defined here and not in linux/mm.h, as it is arch dependent */ | ||
435 | #define kern_addr_valid(addr) \ | ||
436 | (test_bit(__pa((unsigned long)(addr))>>20, sparc_valid_addr_bitmap)) | ||
437 | |||
438 | extern int io_remap_page_range(struct vm_area_struct *vma, | ||
439 | unsigned long from, unsigned long to, | ||
440 | unsigned long size, pgprot_t prot, int space); | ||
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 | |||
453 | #include <asm-generic/pgtable.h> | ||
454 | |||
455 | #endif /* !(__ASSEMBLY__) */ | ||
456 | |||
457 | /* We provide our own get_unmapped_area to cope with VA holes for userland */ | ||
458 | #define HAVE_ARCH_UNMAPPED_AREA | ||
459 | |||
460 | /* | ||
461 | * No page table caches to initialise | ||
462 | */ | ||
463 | #define pgtable_cache_init() do { } while (0) | ||
464 | |||
465 | #endif /* !(_SPARC_PGTABLE_H) */ | ||