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Diffstat (limited to 'include/asm-sparc64/pgtable.h')
-rw-r--r-- | include/asm-sparc64/pgtable.h | 464 |
1 files changed, 464 insertions, 0 deletions
diff --git a/include/asm-sparc64/pgtable.h b/include/asm-sparc64/pgtable.h new file mode 100644 index 000000000000..ca04ac105b69 --- /dev/null +++ b/include/asm-sparc64/pgtable.h | |||
@@ -0,0 +1,464 @@ | |||
1 | /* $Id: pgtable.h,v 1.156 2002/02/09 19:49:31 davem Exp $ | ||
2 | * pgtable.h: SpitFire page table operations. | ||
3 | * | ||
4 | * Copyright 1996,1997 David S. Miller (davem@caip.rutgers.edu) | ||
5 | * Copyright 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) | ||
6 | */ | ||
7 | |||
8 | #ifndef _SPARC64_PGTABLE_H | ||
9 | #define _SPARC64_PGTABLE_H | ||
10 | |||
11 | /* This file contains the functions and defines necessary to modify and use | ||
12 | * the SpitFire page tables. | ||
13 | */ | ||
14 | |||
15 | #include <asm-generic/pgtable-nopud.h> | ||
16 | |||
17 | #include <linux/config.h> | ||
18 | #include <linux/compiler.h> | ||
19 | #include <asm/types.h> | ||
20 | #include <asm/spitfire.h> | ||
21 | #include <asm/asi.h> | ||
22 | #include <asm/system.h> | ||
23 | #include <asm/page.h> | ||
24 | #include <asm/processor.h> | ||
25 | #include <asm/const.h> | ||
26 | |||
27 | /* The kernel image occupies 0x4000000 to 0x1000000 (4MB --> 16MB). | ||
28 | * The page copy blockops use 0x1000000 to 0x18000000 (16MB --> 24MB). | ||
29 | * The PROM resides in an area spanning 0xf0000000 to 0x100000000. | ||
30 | * The vmalloc area spans 0x140000000 to 0x200000000. | ||
31 | * There is a single static kernel PMD which maps from 0x0 to address | ||
32 | * 0x400000000. | ||
33 | */ | ||
34 | #define TLBTEMP_BASE _AC(0x0000000001000000,UL) | ||
35 | #define MODULES_VADDR _AC(0x0000000002000000,UL) | ||
36 | #define MODULES_LEN _AC(0x000000007e000000,UL) | ||
37 | #define MODULES_END _AC(0x0000000080000000,UL) | ||
38 | #define VMALLOC_START _AC(0x0000000140000000,UL) | ||
39 | #define VMALLOC_END _AC(0x0000000200000000,UL) | ||
40 | #define LOW_OBP_ADDRESS _AC(0x00000000f0000000,UL) | ||
41 | #define HI_OBP_ADDRESS _AC(0x0000000100000000,UL) | ||
42 | |||
43 | /* XXX All of this needs to be rethought so we can take advantage | ||
44 | * XXX cheetah's full 64-bit virtual address space, ie. no more hole | ||
45 | * XXX in the middle like on spitfire. -DaveM | ||
46 | */ | ||
47 | /* | ||
48 | * Given a virtual address, the lowest PAGE_SHIFT bits determine offset | ||
49 | * into the page; the next higher PAGE_SHIFT-3 bits determine the pte# | ||
50 | * in the proper pagetable (the -3 is from the 8 byte ptes, and each page | ||
51 | * table is a single page long). The next higher PMD_BITS determine pmd# | ||
52 | * in the proper pmdtable (where we must have PMD_BITS <= (PAGE_SHIFT-2) | ||
53 | * since the pmd entries are 4 bytes, and each pmd page is a single page | ||
54 | * long). Finally, the higher few bits determine pgde#. | ||
55 | */ | ||
56 | |||
57 | /* PMD_SHIFT determines the size of the area a second-level page | ||
58 | * table can map | ||
59 | */ | ||
60 | #define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-3)) | ||
61 | #define PMD_SIZE (1UL << PMD_SHIFT) | ||
62 | #define PMD_MASK (~(PMD_SIZE-1)) | ||
63 | #define PMD_BITS (PAGE_SHIFT - 2) | ||
64 | |||
65 | /* PGDIR_SHIFT determines what a third-level page table entry can map */ | ||
66 | #define PGDIR_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-3) + PMD_BITS) | ||
67 | #define PGDIR_SIZE (1UL << PGDIR_SHIFT) | ||
68 | #define PGDIR_MASK (~(PGDIR_SIZE-1)) | ||
69 | #define PGDIR_BITS (PAGE_SHIFT - 2) | ||
70 | |||
71 | #ifndef __ASSEMBLY__ | ||
72 | |||
73 | #include <linux/sched.h> | ||
74 | |||
75 | /* Entries per page directory level. */ | ||
76 | #define PTRS_PER_PTE (1UL << (PAGE_SHIFT-3)) | ||
77 | #define PTRS_PER_PMD (1UL << PMD_BITS) | ||
78 | #define PTRS_PER_PGD (1UL << PGDIR_BITS) | ||
79 | |||
80 | /* Kernel has a separate 44bit address space. */ | ||
81 | #define FIRST_USER_PGD_NR 0 | ||
82 | |||
83 | #define pte_ERROR(e) __builtin_trap() | ||
84 | #define pmd_ERROR(e) __builtin_trap() | ||
85 | #define pgd_ERROR(e) __builtin_trap() | ||
86 | |||
87 | #endif /* !(__ASSEMBLY__) */ | ||
88 | |||
89 | /* Spitfire/Cheetah TTE bits. */ | ||
90 | #define _PAGE_VALID _AC(0x8000000000000000,UL) /* Valid TTE */ | ||
91 | #define _PAGE_R _AC(0x8000000000000000,UL) /* Keep ref bit up to date*/ | ||
92 | #define _PAGE_SZ4MB _AC(0x6000000000000000,UL) /* 4MB Page */ | ||
93 | #define _PAGE_SZ512K _AC(0x4000000000000000,UL) /* 512K Page */ | ||
94 | #define _PAGE_SZ64K _AC(0x2000000000000000,UL) /* 64K Page */ | ||
95 | #define _PAGE_SZ8K _AC(0x0000000000000000,UL) /* 8K Page */ | ||
96 | #define _PAGE_NFO _AC(0x1000000000000000,UL) /* No Fault Only */ | ||
97 | #define _PAGE_IE _AC(0x0800000000000000,UL) /* Invert Endianness */ | ||
98 | #define _PAGE_SOFT2 _AC(0x07FC000000000000,UL) /* Software bits, set 2 */ | ||
99 | #define _PAGE_RES1 _AC(0x0003000000000000,UL) /* Reserved */ | ||
100 | #define _PAGE_SN _AC(0x0000800000000000,UL) /* (Cheetah) Snoop */ | ||
101 | #define _PAGE_RES2 _AC(0x0000780000000000,UL) /* Reserved */ | ||
102 | #define _PAGE_PADDR_SF _AC(0x000001FFFFFFE000,UL) /* (Spitfire) paddr[40:13]*/ | ||
103 | #define _PAGE_PADDR _AC(0x000007FFFFFFE000,UL) /* (Cheetah) paddr[42:13] */ | ||
104 | #define _PAGE_SOFT _AC(0x0000000000001F80,UL) /* Software bits */ | ||
105 | #define _PAGE_L _AC(0x0000000000000040,UL) /* Locked TTE */ | ||
106 | #define _PAGE_CP _AC(0x0000000000000020,UL) /* Cacheable in P-Cache */ | ||
107 | #define _PAGE_CV _AC(0x0000000000000010,UL) /* Cacheable in V-Cache */ | ||
108 | #define _PAGE_E _AC(0x0000000000000008,UL) /* side-Effect */ | ||
109 | #define _PAGE_P _AC(0x0000000000000004,UL) /* Privileged Page */ | ||
110 | #define _PAGE_W _AC(0x0000000000000002,UL) /* Writable */ | ||
111 | #define _PAGE_G _AC(0x0000000000000001,UL) /* Global */ | ||
112 | |||
113 | /* Here are the SpitFire software bits we use in the TTE's. | ||
114 | * | ||
115 | * WARNING: If you are going to try and start using some | ||
116 | * of the soft2 bits, you will need to make | ||
117 | * modifications to the swap entry implementation. | ||
118 | * For example, one thing that could happen is that | ||
119 | * swp_entry_to_pte() would BUG_ON() if you tried | ||
120 | * to use one of the soft2 bits for _PAGE_FILE. | ||
121 | * | ||
122 | * Like other architectures, I have aliased _PAGE_FILE with | ||
123 | * _PAGE_MODIFIED. This works because _PAGE_FILE is never | ||
124 | * interpreted that way unless _PAGE_PRESENT is clear. | ||
125 | */ | ||
126 | #define _PAGE_EXEC _AC(0x0000000000001000,UL) /* Executable SW bit */ | ||
127 | #define _PAGE_MODIFIED _AC(0x0000000000000800,UL) /* Modified (dirty) */ | ||
128 | #define _PAGE_FILE _AC(0x0000000000000800,UL) /* Pagecache page */ | ||
129 | #define _PAGE_ACCESSED _AC(0x0000000000000400,UL) /* Accessed (ref'd) */ | ||
130 | #define _PAGE_READ _AC(0x0000000000000200,UL) /* Readable SW Bit */ | ||
131 | #define _PAGE_WRITE _AC(0x0000000000000100,UL) /* Writable SW Bit */ | ||
132 | #define _PAGE_PRESENT _AC(0x0000000000000080,UL) /* Present */ | ||
133 | |||
134 | #if PAGE_SHIFT == 13 | ||
135 | #define _PAGE_SZBITS _PAGE_SZ8K | ||
136 | #elif PAGE_SHIFT == 16 | ||
137 | #define _PAGE_SZBITS _PAGE_SZ64K | ||
138 | #elif PAGE_SHIFT == 19 | ||
139 | #define _PAGE_SZBITS _PAGE_SZ512K | ||
140 | #elif PAGE_SHIFT == 22 | ||
141 | #define _PAGE_SZBITS _PAGE_SZ4MB | ||
142 | #else | ||
143 | #error Wrong PAGE_SHIFT specified | ||
144 | #endif | ||
145 | |||
146 | #if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB) | ||
147 | #define _PAGE_SZHUGE _PAGE_SZ4MB | ||
148 | #elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K) | ||
149 | #define _PAGE_SZHUGE _PAGE_SZ512K | ||
150 | #elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K) | ||
151 | #define _PAGE_SZHUGE _PAGE_SZ64K | ||
152 | #endif | ||
153 | |||
154 | #define _PAGE_CACHE (_PAGE_CP | _PAGE_CV) | ||
155 | |||
156 | #define __DIRTY_BITS (_PAGE_MODIFIED | _PAGE_WRITE | _PAGE_W) | ||
157 | #define __ACCESS_BITS (_PAGE_ACCESSED | _PAGE_READ | _PAGE_R) | ||
158 | #define __PRIV_BITS _PAGE_P | ||
159 | |||
160 | #define PAGE_NONE __pgprot (_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_CACHE) | ||
161 | |||
162 | /* Don't set the TTE _PAGE_W bit here, else the dirty bit never gets set. */ | ||
163 | #define PAGE_SHARED __pgprot (_PAGE_PRESENT | _PAGE_VALID | _PAGE_CACHE | \ | ||
164 | __ACCESS_BITS | _PAGE_WRITE | _PAGE_EXEC) | ||
165 | |||
166 | #define PAGE_COPY __pgprot (_PAGE_PRESENT | _PAGE_VALID | _PAGE_CACHE | \ | ||
167 | __ACCESS_BITS | _PAGE_EXEC) | ||
168 | |||
169 | #define PAGE_READONLY __pgprot (_PAGE_PRESENT | _PAGE_VALID | _PAGE_CACHE | \ | ||
170 | __ACCESS_BITS | _PAGE_EXEC) | ||
171 | |||
172 | #define PAGE_KERNEL __pgprot (_PAGE_PRESENT | _PAGE_VALID | _PAGE_CACHE | \ | ||
173 | __PRIV_BITS | \ | ||
174 | __ACCESS_BITS | __DIRTY_BITS | _PAGE_EXEC) | ||
175 | |||
176 | #define PAGE_SHARED_NOEXEC __pgprot (_PAGE_PRESENT | _PAGE_VALID | \ | ||
177 | _PAGE_CACHE | \ | ||
178 | __ACCESS_BITS | _PAGE_WRITE) | ||
179 | |||
180 | #define PAGE_COPY_NOEXEC __pgprot (_PAGE_PRESENT | _PAGE_VALID | \ | ||
181 | _PAGE_CACHE | __ACCESS_BITS) | ||
182 | |||
183 | #define PAGE_READONLY_NOEXEC __pgprot (_PAGE_PRESENT | _PAGE_VALID | \ | ||
184 | _PAGE_CACHE | __ACCESS_BITS) | ||
185 | |||
186 | #define _PFN_MASK _PAGE_PADDR | ||
187 | |||
188 | #define pg_iobits (_PAGE_VALID | _PAGE_PRESENT | __DIRTY_BITS | \ | ||
189 | __ACCESS_BITS | _PAGE_E) | ||
190 | |||
191 | #define __P000 PAGE_NONE | ||
192 | #define __P001 PAGE_READONLY_NOEXEC | ||
193 | #define __P010 PAGE_COPY_NOEXEC | ||
194 | #define __P011 PAGE_COPY_NOEXEC | ||
195 | #define __P100 PAGE_READONLY | ||
196 | #define __P101 PAGE_READONLY | ||
197 | #define __P110 PAGE_COPY | ||
198 | #define __P111 PAGE_COPY | ||
199 | |||
200 | #define __S000 PAGE_NONE | ||
201 | #define __S001 PAGE_READONLY_NOEXEC | ||
202 | #define __S010 PAGE_SHARED_NOEXEC | ||
203 | #define __S011 PAGE_SHARED_NOEXEC | ||
204 | #define __S100 PAGE_READONLY | ||
205 | #define __S101 PAGE_READONLY | ||
206 | #define __S110 PAGE_SHARED | ||
207 | #define __S111 PAGE_SHARED | ||
208 | |||
209 | #ifndef __ASSEMBLY__ | ||
210 | |||
211 | extern unsigned long phys_base; | ||
212 | extern unsigned long pfn_base; | ||
213 | |||
214 | extern struct page *mem_map_zero; | ||
215 | #define ZERO_PAGE(vaddr) (mem_map_zero) | ||
216 | |||
217 | /* PFNs are real physical page numbers. However, mem_map only begins to record | ||
218 | * per-page information starting at pfn_base. This is to handle systems where | ||
219 | * the first physical page in the machine is at some huge physical address, | ||
220 | * such as 4GB. This is common on a partitioned E10000, for example. | ||
221 | */ | ||
222 | |||
223 | #define pfn_pte(pfn, prot) \ | ||
224 | __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot) | _PAGE_SZBITS) | ||
225 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) | ||
226 | |||
227 | #define pte_pfn(x) ((pte_val(x) & _PAGE_PADDR)>>PAGE_SHIFT) | ||
228 | #define pte_page(x) pfn_to_page(pte_pfn(x)) | ||
229 | |||
230 | #define page_pte_prot(page, prot) mk_pte(page, prot) | ||
231 | #define page_pte(page) page_pte_prot(page, __pgprot(0)) | ||
232 | |||
233 | static inline pte_t pte_modify(pte_t orig_pte, pgprot_t new_prot) | ||
234 | { | ||
235 | pte_t __pte; | ||
236 | const unsigned long preserve_mask = (_PFN_MASK | | ||
237 | _PAGE_MODIFIED | _PAGE_ACCESSED | | ||
238 | _PAGE_CACHE | _PAGE_E | | ||
239 | _PAGE_PRESENT | _PAGE_SZBITS); | ||
240 | |||
241 | pte_val(__pte) = (pte_val(orig_pte) & preserve_mask) | | ||
242 | (pgprot_val(new_prot) & ~preserve_mask); | ||
243 | |||
244 | return __pte; | ||
245 | } | ||
246 | #define pmd_set(pmdp, ptep) \ | ||
247 | (pmd_val(*(pmdp)) = (__pa((unsigned long) (ptep)) >> 11UL)) | ||
248 | #define pud_set(pudp, pmdp) \ | ||
249 | (pud_val(*(pudp)) = (__pa((unsigned long) (pmdp)) >> 11UL)) | ||
250 | #define __pmd_page(pmd) \ | ||
251 | ((unsigned long) __va((((unsigned long)pmd_val(pmd))<<11UL))) | ||
252 | #define pmd_page(pmd) virt_to_page((void *)__pmd_page(pmd)) | ||
253 | #define pud_page(pud) \ | ||
254 | ((unsigned long) __va((((unsigned long)pud_val(pud))<<11UL))) | ||
255 | #define pte_none(pte) (!pte_val(pte)) | ||
256 | #define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT) | ||
257 | #define pmd_none(pmd) (!pmd_val(pmd)) | ||
258 | #define pmd_bad(pmd) (0) | ||
259 | #define pmd_present(pmd) (pmd_val(pmd) != 0U) | ||
260 | #define pmd_clear(pmdp) (pmd_val(*(pmdp)) = 0U) | ||
261 | #define pud_none(pud) (!pud_val(pud)) | ||
262 | #define pud_bad(pud) (0) | ||
263 | #define pud_present(pud) (pud_val(pud) != 0U) | ||
264 | #define pud_clear(pudp) (pud_val(*(pudp)) = 0U) | ||
265 | |||
266 | /* The following only work if pte_present() is true. | ||
267 | * Undefined behaviour if not.. | ||
268 | */ | ||
269 | #define pte_read(pte) (pte_val(pte) & _PAGE_READ) | ||
270 | #define pte_exec(pte) (pte_val(pte) & _PAGE_EXEC) | ||
271 | #define pte_write(pte) (pte_val(pte) & _PAGE_WRITE) | ||
272 | #define pte_dirty(pte) (pte_val(pte) & _PAGE_MODIFIED) | ||
273 | #define pte_young(pte) (pte_val(pte) & _PAGE_ACCESSED) | ||
274 | #define pte_wrprotect(pte) (__pte(pte_val(pte) & ~(_PAGE_WRITE|_PAGE_W))) | ||
275 | #define pte_rdprotect(pte) \ | ||
276 | (__pte(((pte_val(pte)<<1UL)>>1UL) & ~_PAGE_READ)) | ||
277 | #define pte_mkclean(pte) \ | ||
278 | (__pte(pte_val(pte) & ~(_PAGE_MODIFIED|_PAGE_W))) | ||
279 | #define pte_mkold(pte) \ | ||
280 | (__pte(((pte_val(pte)<<1UL)>>1UL) & ~_PAGE_ACCESSED)) | ||
281 | |||
282 | /* Permanent address of a page. */ | ||
283 | #define __page_address(page) page_address(page) | ||
284 | |||
285 | /* Be very careful when you change these three, they are delicate. */ | ||
286 | #define pte_mkyoung(pte) (__pte(pte_val(pte) | _PAGE_ACCESSED | _PAGE_R)) | ||
287 | #define pte_mkwrite(pte) (__pte(pte_val(pte) | _PAGE_WRITE)) | ||
288 | #define pte_mkdirty(pte) (__pte(pte_val(pte) | _PAGE_MODIFIED | _PAGE_W)) | ||
289 | |||
290 | /* to find an entry in a page-table-directory. */ | ||
291 | #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) | ||
292 | #define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address)) | ||
293 | |||
294 | /* to find an entry in a kernel page-table-directory */ | ||
295 | #define pgd_offset_k(address) pgd_offset(&init_mm, address) | ||
296 | |||
297 | /* extract the pgd cache used for optimizing the tlb miss | ||
298 | * slow path when executing 32-bit compat processes | ||
299 | */ | ||
300 | #define get_pgd_cache(pgd) ((unsigned long) pgd_val(*pgd) << 11) | ||
301 | |||
302 | /* Find an entry in the second-level page table.. */ | ||
303 | #define pmd_offset(pudp, address) \ | ||
304 | ((pmd_t *) pud_page(*(pudp)) + \ | ||
305 | (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))) | ||
306 | |||
307 | /* Find an entry in the third-level page table.. */ | ||
308 | #define pte_index(dir, address) \ | ||
309 | ((pte_t *) __pmd_page(*(dir)) + \ | ||
310 | ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))) | ||
311 | #define pte_offset_kernel pte_index | ||
312 | #define pte_offset_map pte_index | ||
313 | #define pte_offset_map_nested pte_index | ||
314 | #define pte_unmap(pte) do { } while (0) | ||
315 | #define pte_unmap_nested(pte) do { } while (0) | ||
316 | |||
317 | /* Actual page table PTE updates. */ | ||
318 | extern void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr, pte_t *ptep, pte_t orig); | ||
319 | |||
320 | static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte) | ||
321 | { | ||
322 | pte_t orig = *ptep; | ||
323 | |||
324 | *ptep = pte; | ||
325 | |||
326 | /* It is more efficient to let flush_tlb_kernel_range() | ||
327 | * handle init_mm tlb flushes. | ||
328 | */ | ||
329 | if (likely(mm != &init_mm) && (pte_val(orig) & _PAGE_VALID)) | ||
330 | tlb_batch_add(mm, addr, ptep, orig); | ||
331 | } | ||
332 | |||
333 | #define pte_clear(mm,addr,ptep) \ | ||
334 | set_pte_at((mm), (addr), (ptep), __pte(0UL)) | ||
335 | |||
336 | extern pgd_t swapper_pg_dir[1]; | ||
337 | |||
338 | /* These do nothing with the way I have things setup. */ | ||
339 | #define mmu_lockarea(vaddr, len) (vaddr) | ||
340 | #define mmu_unlockarea(vaddr, len) do { } while(0) | ||
341 | |||
342 | struct vm_area_struct; | ||
343 | extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t); | ||
344 | |||
345 | /* Make a non-present pseudo-TTE. */ | ||
346 | static inline pte_t mk_pte_io(unsigned long page, pgprot_t prot, int space) | ||
347 | { | ||
348 | pte_t pte; | ||
349 | pte_val(pte) = (((page) | pgprot_val(prot) | _PAGE_E) & | ||
350 | ~(unsigned long)_PAGE_CACHE); | ||
351 | pte_val(pte) |= (((unsigned long)space) << 32); | ||
352 | return pte; | ||
353 | } | ||
354 | |||
355 | /* Encode and de-code a swap entry */ | ||
356 | #define __swp_type(entry) (((entry).val >> PAGE_SHIFT) & 0xffUL) | ||
357 | #define __swp_offset(entry) ((entry).val >> (PAGE_SHIFT + 8UL)) | ||
358 | #define __swp_entry(type, offset) \ | ||
359 | ( (swp_entry_t) \ | ||
360 | { \ | ||
361 | (((long)(type) << PAGE_SHIFT) | \ | ||
362 | ((long)(offset) << (PAGE_SHIFT + 8UL))) \ | ||
363 | } ) | ||
364 | #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) | ||
365 | #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) | ||
366 | |||
367 | /* File offset in PTE support. */ | ||
368 | #define pte_file(pte) (pte_val(pte) & _PAGE_FILE) | ||
369 | #define pte_to_pgoff(pte) (pte_val(pte) >> PAGE_SHIFT) | ||
370 | #define pgoff_to_pte(off) (__pte(((off) << PAGE_SHIFT) | _PAGE_FILE)) | ||
371 | #define PTE_FILE_MAX_BITS (64UL - PAGE_SHIFT - 1UL) | ||
372 | |||
373 | extern unsigned long prom_virt_to_phys(unsigned long, int *); | ||
374 | |||
375 | static __inline__ unsigned long | ||
376 | sun4u_get_pte (unsigned long addr) | ||
377 | { | ||
378 | pgd_t *pgdp; | ||
379 | pud_t *pudp; | ||
380 | pmd_t *pmdp; | ||
381 | pte_t *ptep; | ||
382 | |||
383 | if (addr >= PAGE_OFFSET) | ||
384 | return addr & _PAGE_PADDR; | ||
385 | if ((addr >= LOW_OBP_ADDRESS) && (addr < HI_OBP_ADDRESS)) | ||
386 | return prom_virt_to_phys(addr, NULL); | ||
387 | pgdp = pgd_offset_k(addr); | ||
388 | pudp = pud_offset(pgdp, addr); | ||
389 | pmdp = pmd_offset(pudp, addr); | ||
390 | ptep = pte_offset_kernel(pmdp, addr); | ||
391 | return pte_val(*ptep) & _PAGE_PADDR; | ||
392 | } | ||
393 | |||
394 | static __inline__ unsigned long | ||
395 | __get_phys (unsigned long addr) | ||
396 | { | ||
397 | return sun4u_get_pte (addr); | ||
398 | } | ||
399 | |||
400 | static __inline__ int | ||
401 | __get_iospace (unsigned long addr) | ||
402 | { | ||
403 | return ((sun4u_get_pte (addr) & 0xf0000000) >> 28); | ||
404 | } | ||
405 | |||
406 | extern unsigned long *sparc64_valid_addr_bitmap; | ||
407 | |||
408 | /* Needs to be defined here and not in linux/mm.h, as it is arch dependent */ | ||
409 | #define kern_addr_valid(addr) \ | ||
410 | (test_bit(__pa((unsigned long)(addr))>>22, sparc64_valid_addr_bitmap)) | ||
411 | |||
412 | extern int io_remap_page_range(struct vm_area_struct *vma, unsigned long from, | ||
413 | unsigned long offset, | ||
414 | unsigned long size, pgprot_t prot, int space); | ||
415 | extern int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from, | ||
416 | unsigned long pfn, | ||
417 | unsigned long size, pgprot_t prot); | ||
418 | |||
419 | /* | ||
420 | * For sparc32&64, the pfn in io_remap_pfn_range() carries <iospace> in | ||
421 | * its high 4 bits. These macros/functions put it there or get it from there. | ||
422 | */ | ||
423 | #define MK_IOSPACE_PFN(space, pfn) (pfn | (space << (BITS_PER_LONG - 4))) | ||
424 | #define GET_IOSPACE(pfn) (pfn >> (BITS_PER_LONG - 4)) | ||
425 | #define GET_PFN(pfn) (pfn & 0x0fffffffffffffffUL) | ||
426 | |||
427 | /* Override for {pgd,pmd}_addr_end() to deal with the virtual address | ||
428 | * space hole. We simply sign extend bit 43. | ||
429 | */ | ||
430 | #define pgd_addr_end(addr, end) \ | ||
431 | ({ unsigned long __boundary = ((addr) + PGDIR_SIZE) & PGDIR_MASK; \ | ||
432 | __boundary = ((long) (__boundary << 20)) >> 20; \ | ||
433 | (__boundary - 1 < (end) - 1)? __boundary: (end); \ | ||
434 | }) | ||
435 | |||
436 | #define pmd_addr_end(addr, end) \ | ||
437 | ({ unsigned long __boundary = ((addr) + PMD_SIZE) & PMD_MASK; \ | ||
438 | __boundary = ((long) (__boundary << 20)) >> 20; \ | ||
439 | (__boundary - 1 < (end) - 1)? __boundary: (end); \ | ||
440 | }) | ||
441 | |||
442 | #include <asm-generic/pgtable.h> | ||
443 | |||
444 | /* We provide our own get_unmapped_area to cope with VA holes for userland */ | ||
445 | #define HAVE_ARCH_UNMAPPED_AREA | ||
446 | |||
447 | /* We provide a special get_unmapped_area for framebuffer mmaps to try and use | ||
448 | * the largest alignment possible such that larget PTEs can be used. | ||
449 | */ | ||
450 | extern unsigned long get_fb_unmapped_area(struct file *filp, unsigned long, | ||
451 | unsigned long, unsigned long, | ||
452 | unsigned long); | ||
453 | #define HAVE_ARCH_FB_UNMAPPED_AREA | ||
454 | |||
455 | /* | ||
456 | * No page table caches to initialise | ||
457 | */ | ||
458 | #define pgtable_cache_init() do { } while (0) | ||
459 | |||
460 | extern void check_pgt_cache(void); | ||
461 | |||
462 | #endif /* !(__ASSEMBLY__) */ | ||
463 | |||
464 | #endif /* !(_SPARC64_PGTABLE_H) */ | ||