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Diffstat (limited to 'include/asm-arm/pgtable.h')
-rw-r--r-- | include/asm-arm/pgtable.h | 433 |
1 files changed, 433 insertions, 0 deletions
diff --git a/include/asm-arm/pgtable.h b/include/asm-arm/pgtable.h new file mode 100644 index 000000000000..91ffb1f4cd10 --- /dev/null +++ b/include/asm-arm/pgtable.h | |||
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1 | /* | ||
2 | * linux/include/asm-arm/pgtable.h | ||
3 | * | ||
4 | * Copyright (C) 1995-2002 Russell King | ||
5 | * | ||
6 | * This program is free software; you can redistribute it and/or modify | ||
7 | * it under the terms of the GNU General Public License version 2 as | ||
8 | * published by the Free Software Foundation. | ||
9 | */ | ||
10 | #ifndef _ASMARM_PGTABLE_H | ||
11 | #define _ASMARM_PGTABLE_H | ||
12 | |||
13 | #include <asm-generic/4level-fixup.h> | ||
14 | |||
15 | #include <asm/memory.h> | ||
16 | #include <asm/proc-fns.h> | ||
17 | #include <asm/arch/vmalloc.h> | ||
18 | |||
19 | /* | ||
20 | * Hardware-wise, we have a two level page table structure, where the first | ||
21 | * level has 4096 entries, and the second level has 256 entries. Each entry | ||
22 | * is one 32-bit word. Most of the bits in the second level entry are used | ||
23 | * by hardware, and there aren't any "accessed" and "dirty" bits. | ||
24 | * | ||
25 | * Linux on the other hand has a three level page table structure, which can | ||
26 | * be wrapped to fit a two level page table structure easily - using the PGD | ||
27 | * and PTE only. However, Linux also expects one "PTE" table per page, and | ||
28 | * at least a "dirty" bit. | ||
29 | * | ||
30 | * Therefore, we tweak the implementation slightly - we tell Linux that we | ||
31 | * have 2048 entries in the first level, each of which is 8 bytes (iow, two | ||
32 | * hardware pointers to the second level.) The second level contains two | ||
33 | * hardware PTE tables arranged contiguously, followed by Linux versions | ||
34 | * which contain the state information Linux needs. We, therefore, end up | ||
35 | * with 512 entries in the "PTE" level. | ||
36 | * | ||
37 | * This leads to the page tables having the following layout: | ||
38 | * | ||
39 | * pgd pte | ||
40 | * | | | ||
41 | * +--------+ +0 | ||
42 | * | |-----> +------------+ +0 | ||
43 | * +- - - - + +4 | h/w pt 0 | | ||
44 | * | |-----> +------------+ +1024 | ||
45 | * +--------+ +8 | h/w pt 1 | | ||
46 | * | | +------------+ +2048 | ||
47 | * +- - - - + | Linux pt 0 | | ||
48 | * | | +------------+ +3072 | ||
49 | * +--------+ | Linux pt 1 | | ||
50 | * | | +------------+ +4096 | ||
51 | * | ||
52 | * See L_PTE_xxx below for definitions of bits in the "Linux pt", and | ||
53 | * PTE_xxx for definitions of bits appearing in the "h/w pt". | ||
54 | * | ||
55 | * PMD_xxx definitions refer to bits in the first level page table. | ||
56 | * | ||
57 | * The "dirty" bit is emulated by only granting hardware write permission | ||
58 | * iff the page is marked "writable" and "dirty" in the Linux PTE. This | ||
59 | * means that a write to a clean page will cause a permission fault, and | ||
60 | * the Linux MM layer will mark the page dirty via handle_pte_fault(). | ||
61 | * For the hardware to notice the permission change, the TLB entry must | ||
62 | * be flushed, and ptep_establish() does that for us. | ||
63 | * | ||
64 | * The "accessed" or "young" bit is emulated by a similar method; we only | ||
65 | * allow accesses to the page if the "young" bit is set. Accesses to the | ||
66 | * page will cause a fault, and handle_pte_fault() will set the young bit | ||
67 | * for us as long as the page is marked present in the corresponding Linux | ||
68 | * PTE entry. Again, ptep_establish() will ensure that the TLB is up to | ||
69 | * date. | ||
70 | * | ||
71 | * However, when the "young" bit is cleared, we deny access to the page | ||
72 | * by clearing the hardware PTE. Currently Linux does not flush the TLB | ||
73 | * for us in this case, which means the TLB will retain the transation | ||
74 | * until either the TLB entry is evicted under pressure, or a context | ||
75 | * switch which changes the user space mapping occurs. | ||
76 | */ | ||
77 | #define PTRS_PER_PTE 512 | ||
78 | #define PTRS_PER_PMD 1 | ||
79 | #define PTRS_PER_PGD 2048 | ||
80 | |||
81 | /* | ||
82 | * PMD_SHIFT determines the size of the area a second-level page table can map | ||
83 | * PGDIR_SHIFT determines what a third-level page table entry can map | ||
84 | */ | ||
85 | #define PMD_SHIFT 21 | ||
86 | #define PGDIR_SHIFT 21 | ||
87 | |||
88 | #define LIBRARY_TEXT_START 0x0c000000 | ||
89 | |||
90 | #ifndef __ASSEMBLY__ | ||
91 | extern void __pte_error(const char *file, int line, unsigned long val); | ||
92 | extern void __pmd_error(const char *file, int line, unsigned long val); | ||
93 | extern void __pgd_error(const char *file, int line, unsigned long val); | ||
94 | |||
95 | #define pte_ERROR(pte) __pte_error(__FILE__, __LINE__, pte_val(pte)) | ||
96 | #define pmd_ERROR(pmd) __pmd_error(__FILE__, __LINE__, pmd_val(pmd)) | ||
97 | #define pgd_ERROR(pgd) __pgd_error(__FILE__, __LINE__, pgd_val(pgd)) | ||
98 | #endif /* !__ASSEMBLY__ */ | ||
99 | |||
100 | #define PMD_SIZE (1UL << PMD_SHIFT) | ||
101 | #define PMD_MASK (~(PMD_SIZE-1)) | ||
102 | #define PGDIR_SIZE (1UL << PGDIR_SHIFT) | ||
103 | #define PGDIR_MASK (~(PGDIR_SIZE-1)) | ||
104 | |||
105 | #define FIRST_USER_PGD_NR 1 | ||
106 | #define USER_PTRS_PER_PGD ((TASK_SIZE/PGDIR_SIZE) - FIRST_USER_PGD_NR) | ||
107 | |||
108 | /* | ||
109 | * ARMv6 supersection address mask and size definitions. | ||
110 | */ | ||
111 | #define SUPERSECTION_SHIFT 24 | ||
112 | #define SUPERSECTION_SIZE (1UL << SUPERSECTION_SHIFT) | ||
113 | #define SUPERSECTION_MASK (~(SUPERSECTION_SIZE-1)) | ||
114 | |||
115 | /* | ||
116 | * Hardware page table definitions. | ||
117 | * | ||
118 | * + Level 1 descriptor (PMD) | ||
119 | * - common | ||
120 | */ | ||
121 | #define PMD_TYPE_MASK (3 << 0) | ||
122 | #define PMD_TYPE_FAULT (0 << 0) | ||
123 | #define PMD_TYPE_TABLE (1 << 0) | ||
124 | #define PMD_TYPE_SECT (2 << 0) | ||
125 | #define PMD_BIT4 (1 << 4) | ||
126 | #define PMD_DOMAIN(x) ((x) << 5) | ||
127 | #define PMD_PROTECTION (1 << 9) /* v5 */ | ||
128 | /* | ||
129 | * - section | ||
130 | */ | ||
131 | #define PMD_SECT_BUFFERABLE (1 << 2) | ||
132 | #define PMD_SECT_CACHEABLE (1 << 3) | ||
133 | #define PMD_SECT_AP_WRITE (1 << 10) | ||
134 | #define PMD_SECT_AP_READ (1 << 11) | ||
135 | #define PMD_SECT_TEX(x) ((x) << 12) /* v5 */ | ||
136 | #define PMD_SECT_APX (1 << 15) /* v6 */ | ||
137 | #define PMD_SECT_S (1 << 16) /* v6 */ | ||
138 | #define PMD_SECT_nG (1 << 17) /* v6 */ | ||
139 | #define PMD_SECT_SUPER (1 << 18) /* v6 */ | ||
140 | |||
141 | #define PMD_SECT_UNCACHED (0) | ||
142 | #define PMD_SECT_BUFFERED (PMD_SECT_BUFFERABLE) | ||
143 | #define PMD_SECT_WT (PMD_SECT_CACHEABLE) | ||
144 | #define PMD_SECT_WB (PMD_SECT_CACHEABLE | PMD_SECT_BUFFERABLE) | ||
145 | #define PMD_SECT_MINICACHE (PMD_SECT_TEX(1) | PMD_SECT_CACHEABLE) | ||
146 | #define PMD_SECT_WBWA (PMD_SECT_TEX(1) | PMD_SECT_CACHEABLE | PMD_SECT_BUFFERABLE) | ||
147 | |||
148 | /* | ||
149 | * - coarse table (not used) | ||
150 | */ | ||
151 | |||
152 | /* | ||
153 | * + Level 2 descriptor (PTE) | ||
154 | * - common | ||
155 | */ | ||
156 | #define PTE_TYPE_MASK (3 << 0) | ||
157 | #define PTE_TYPE_FAULT (0 << 0) | ||
158 | #define PTE_TYPE_LARGE (1 << 0) | ||
159 | #define PTE_TYPE_SMALL (2 << 0) | ||
160 | #define PTE_TYPE_EXT (3 << 0) /* v5 */ | ||
161 | #define PTE_BUFFERABLE (1 << 2) | ||
162 | #define PTE_CACHEABLE (1 << 3) | ||
163 | |||
164 | /* | ||
165 | * - extended small page/tiny page | ||
166 | */ | ||
167 | #define PTE_EXT_AP_MASK (3 << 4) | ||
168 | #define PTE_EXT_AP_UNO_SRO (0 << 4) | ||
169 | #define PTE_EXT_AP_UNO_SRW (1 << 4) | ||
170 | #define PTE_EXT_AP_URO_SRW (2 << 4) | ||
171 | #define PTE_EXT_AP_URW_SRW (3 << 4) | ||
172 | #define PTE_EXT_TEX(x) ((x) << 6) /* v5 */ | ||
173 | |||
174 | /* | ||
175 | * - small page | ||
176 | */ | ||
177 | #define PTE_SMALL_AP_MASK (0xff << 4) | ||
178 | #define PTE_SMALL_AP_UNO_SRO (0x00 << 4) | ||
179 | #define PTE_SMALL_AP_UNO_SRW (0x55 << 4) | ||
180 | #define PTE_SMALL_AP_URO_SRW (0xaa << 4) | ||
181 | #define PTE_SMALL_AP_URW_SRW (0xff << 4) | ||
182 | |||
183 | /* | ||
184 | * "Linux" PTE definitions. | ||
185 | * | ||
186 | * We keep two sets of PTEs - the hardware and the linux version. | ||
187 | * This allows greater flexibility in the way we map the Linux bits | ||
188 | * onto the hardware tables, and allows us to have YOUNG and DIRTY | ||
189 | * bits. | ||
190 | * | ||
191 | * The PTE table pointer refers to the hardware entries; the "Linux" | ||
192 | * entries are stored 1024 bytes below. | ||
193 | */ | ||
194 | #define L_PTE_PRESENT (1 << 0) | ||
195 | #define L_PTE_FILE (1 << 1) /* only when !PRESENT */ | ||
196 | #define L_PTE_YOUNG (1 << 1) | ||
197 | #define L_PTE_BUFFERABLE (1 << 2) /* matches PTE */ | ||
198 | #define L_PTE_CACHEABLE (1 << 3) /* matches PTE */ | ||
199 | #define L_PTE_USER (1 << 4) | ||
200 | #define L_PTE_WRITE (1 << 5) | ||
201 | #define L_PTE_EXEC (1 << 6) | ||
202 | #define L_PTE_DIRTY (1 << 7) | ||
203 | |||
204 | #ifndef __ASSEMBLY__ | ||
205 | |||
206 | #include <asm/domain.h> | ||
207 | |||
208 | #define _PAGE_USER_TABLE (PMD_TYPE_TABLE | PMD_BIT4 | PMD_DOMAIN(DOMAIN_USER)) | ||
209 | #define _PAGE_KERNEL_TABLE (PMD_TYPE_TABLE | PMD_BIT4 | PMD_DOMAIN(DOMAIN_KERNEL)) | ||
210 | |||
211 | /* | ||
212 | * The following macros handle the cache and bufferable bits... | ||
213 | */ | ||
214 | #define _L_PTE_DEFAULT L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_CACHEABLE | L_PTE_BUFFERABLE | ||
215 | #define _L_PTE_READ L_PTE_USER | L_PTE_EXEC | ||
216 | |||
217 | extern pgprot_t pgprot_kernel; | ||
218 | |||
219 | #define PAGE_NONE __pgprot(_L_PTE_DEFAULT) | ||
220 | #define PAGE_COPY __pgprot(_L_PTE_DEFAULT | _L_PTE_READ) | ||
221 | #define PAGE_SHARED __pgprot(_L_PTE_DEFAULT | _L_PTE_READ | L_PTE_WRITE) | ||
222 | #define PAGE_READONLY __pgprot(_L_PTE_DEFAULT | _L_PTE_READ) | ||
223 | #define PAGE_KERNEL pgprot_kernel | ||
224 | |||
225 | #endif /* __ASSEMBLY__ */ | ||
226 | |||
227 | /* | ||
228 | * The table below defines the page protection levels that we insert into our | ||
229 | * Linux page table version. These get translated into the best that the | ||
230 | * architecture can perform. Note that on most ARM hardware: | ||
231 | * 1) We cannot do execute protection | ||
232 | * 2) If we could do execute protection, then read is implied | ||
233 | * 3) write implies read permissions | ||
234 | */ | ||
235 | #define __P000 PAGE_NONE | ||
236 | #define __P001 PAGE_READONLY | ||
237 | #define __P010 PAGE_COPY | ||
238 | #define __P011 PAGE_COPY | ||
239 | #define __P100 PAGE_READONLY | ||
240 | #define __P101 PAGE_READONLY | ||
241 | #define __P110 PAGE_COPY | ||
242 | #define __P111 PAGE_COPY | ||
243 | |||
244 | #define __S000 PAGE_NONE | ||
245 | #define __S001 PAGE_READONLY | ||
246 | #define __S010 PAGE_SHARED | ||
247 | #define __S011 PAGE_SHARED | ||
248 | #define __S100 PAGE_READONLY | ||
249 | #define __S101 PAGE_READONLY | ||
250 | #define __S110 PAGE_SHARED | ||
251 | #define __S111 PAGE_SHARED | ||
252 | |||
253 | #ifndef __ASSEMBLY__ | ||
254 | /* | ||
255 | * ZERO_PAGE is a global shared page that is always zero: used | ||
256 | * for zero-mapped memory areas etc.. | ||
257 | */ | ||
258 | extern struct page *empty_zero_page; | ||
259 | #define ZERO_PAGE(vaddr) (empty_zero_page) | ||
260 | |||
261 | #define pte_pfn(pte) (pte_val(pte) >> PAGE_SHIFT) | ||
262 | #define pfn_pte(pfn,prot) (__pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))) | ||
263 | |||
264 | #define pte_none(pte) (!pte_val(pte)) | ||
265 | #define pte_clear(mm,addr,ptep) set_pte_at((mm),(addr),(ptep), __pte(0)) | ||
266 | #define pte_page(pte) (pfn_to_page(pte_pfn(pte))) | ||
267 | #define pte_offset_kernel(dir,addr) (pmd_page_kernel(*(dir)) + __pte_index(addr)) | ||
268 | #define pte_offset_map(dir,addr) (pmd_page_kernel(*(dir)) + __pte_index(addr)) | ||
269 | #define pte_offset_map_nested(dir,addr) (pmd_page_kernel(*(dir)) + __pte_index(addr)) | ||
270 | #define pte_unmap(pte) do { } while (0) | ||
271 | #define pte_unmap_nested(pte) do { } while (0) | ||
272 | |||
273 | #define set_pte(ptep, pte) cpu_set_pte(ptep,pte) | ||
274 | #define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval) | ||
275 | |||
276 | /* | ||
277 | * The following only work if pte_present() is true. | ||
278 | * Undefined behaviour if not.. | ||
279 | */ | ||
280 | #define pte_present(pte) (pte_val(pte) & L_PTE_PRESENT) | ||
281 | #define pte_read(pte) (pte_val(pte) & L_PTE_USER) | ||
282 | #define pte_write(pte) (pte_val(pte) & L_PTE_WRITE) | ||
283 | #define pte_exec(pte) (pte_val(pte) & L_PTE_EXEC) | ||
284 | #define pte_dirty(pte) (pte_val(pte) & L_PTE_DIRTY) | ||
285 | #define pte_young(pte) (pte_val(pte) & L_PTE_YOUNG) | ||
286 | |||
287 | /* | ||
288 | * The following only works if pte_present() is not true. | ||
289 | */ | ||
290 | #define pte_file(pte) (pte_val(pte) & L_PTE_FILE) | ||
291 | #define pte_to_pgoff(x) (pte_val(x) >> 2) | ||
292 | #define pgoff_to_pte(x) __pte(((x) << 2) | L_PTE_FILE) | ||
293 | |||
294 | #define PTE_FILE_MAX_BITS 30 | ||
295 | |||
296 | #define PTE_BIT_FUNC(fn,op) \ | ||
297 | static inline pte_t pte_##fn(pte_t pte) { pte_val(pte) op; return pte; } | ||
298 | |||
299 | /*PTE_BIT_FUNC(rdprotect, &= ~L_PTE_USER);*/ | ||
300 | /*PTE_BIT_FUNC(mkread, |= L_PTE_USER);*/ | ||
301 | PTE_BIT_FUNC(wrprotect, &= ~L_PTE_WRITE); | ||
302 | PTE_BIT_FUNC(mkwrite, |= L_PTE_WRITE); | ||
303 | PTE_BIT_FUNC(exprotect, &= ~L_PTE_EXEC); | ||
304 | PTE_BIT_FUNC(mkexec, |= L_PTE_EXEC); | ||
305 | PTE_BIT_FUNC(mkclean, &= ~L_PTE_DIRTY); | ||
306 | PTE_BIT_FUNC(mkdirty, |= L_PTE_DIRTY); | ||
307 | PTE_BIT_FUNC(mkold, &= ~L_PTE_YOUNG); | ||
308 | PTE_BIT_FUNC(mkyoung, |= L_PTE_YOUNG); | ||
309 | |||
310 | /* | ||
311 | * Mark the prot value as uncacheable and unbufferable. | ||
312 | */ | ||
313 | #define pgprot_noncached(prot) __pgprot(pgprot_val(prot) & ~(L_PTE_CACHEABLE | L_PTE_BUFFERABLE)) | ||
314 | #define pgprot_writecombine(prot) __pgprot(pgprot_val(prot) & ~L_PTE_CACHEABLE) | ||
315 | |||
316 | #define pmd_none(pmd) (!pmd_val(pmd)) | ||
317 | #define pmd_present(pmd) (pmd_val(pmd)) | ||
318 | #define pmd_bad(pmd) (pmd_val(pmd) & 2) | ||
319 | |||
320 | #define copy_pmd(pmdpd,pmdps) \ | ||
321 | do { \ | ||
322 | pmdpd[0] = pmdps[0]; \ | ||
323 | pmdpd[1] = pmdps[1]; \ | ||
324 | flush_pmd_entry(pmdpd); \ | ||
325 | } while (0) | ||
326 | |||
327 | #define pmd_clear(pmdp) \ | ||
328 | do { \ | ||
329 | pmdp[0] = __pmd(0); \ | ||
330 | pmdp[1] = __pmd(0); \ | ||
331 | clean_pmd_entry(pmdp); \ | ||
332 | } while (0) | ||
333 | |||
334 | static inline pte_t *pmd_page_kernel(pmd_t pmd) | ||
335 | { | ||
336 | unsigned long ptr; | ||
337 | |||
338 | ptr = pmd_val(pmd) & ~(PTRS_PER_PTE * sizeof(void *) - 1); | ||
339 | ptr += PTRS_PER_PTE * sizeof(void *); | ||
340 | |||
341 | return __va(ptr); | ||
342 | } | ||
343 | |||
344 | #define pmd_page(pmd) virt_to_page(__va(pmd_val(pmd))) | ||
345 | |||
346 | /* | ||
347 | * Permanent address of a page. We never have highmem, so this is trivial. | ||
348 | */ | ||
349 | #define pages_to_mb(x) ((x) >> (20 - PAGE_SHIFT)) | ||
350 | |||
351 | /* | ||
352 | * Conversion functions: convert a page and protection to a page entry, | ||
353 | * and a page entry and page directory to the page they refer to. | ||
354 | */ | ||
355 | #define mk_pte(page,prot) pfn_pte(page_to_pfn(page),prot) | ||
356 | |||
357 | /* | ||
358 | * The "pgd_xxx()" functions here are trivial for a folded two-level | ||
359 | * setup: the pgd is never bad, and a pmd always exists (as it's folded | ||
360 | * into the pgd entry) | ||
361 | */ | ||
362 | #define pgd_none(pgd) (0) | ||
363 | #define pgd_bad(pgd) (0) | ||
364 | #define pgd_present(pgd) (1) | ||
365 | #define pgd_clear(pgdp) do { } while (0) | ||
366 | #define set_pgd(pgd,pgdp) do { } while (0) | ||
367 | |||
368 | #define page_pte_prot(page,prot) mk_pte(page, prot) | ||
369 | #define page_pte(page) mk_pte(page, __pgprot(0)) | ||
370 | |||
371 | /* to find an entry in a page-table-directory */ | ||
372 | #define pgd_index(addr) ((addr) >> PGDIR_SHIFT) | ||
373 | |||
374 | #define pgd_offset(mm, addr) ((mm)->pgd+pgd_index(addr)) | ||
375 | |||
376 | /* to find an entry in a kernel page-table-directory */ | ||
377 | #define pgd_offset_k(addr) pgd_offset(&init_mm, addr) | ||
378 | |||
379 | /* Find an entry in the second-level page table.. */ | ||
380 | #define pmd_offset(dir, addr) ((pmd_t *)(dir)) | ||
381 | |||
382 | /* Find an entry in the third-level page table.. */ | ||
383 | #define __pte_index(addr) (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) | ||
384 | |||
385 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) | ||
386 | { | ||
387 | const unsigned long mask = L_PTE_EXEC | L_PTE_WRITE | L_PTE_USER; | ||
388 | pte_val(pte) = (pte_val(pte) & ~mask) | (pgprot_val(newprot) & mask); | ||
389 | return pte; | ||
390 | } | ||
391 | |||
392 | extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; | ||
393 | |||
394 | /* Encode and decode a swap entry. | ||
395 | * | ||
396 | * We support up to 32GB of swap on 4k machines | ||
397 | */ | ||
398 | #define __swp_type(x) (((x).val >> 2) & 0x7f) | ||
399 | #define __swp_offset(x) ((x).val >> 9) | ||
400 | #define __swp_entry(type,offset) ((swp_entry_t) { ((type) << 2) | ((offset) << 9) }) | ||
401 | #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) | ||
402 | #define __swp_entry_to_pte(swp) ((pte_t) { (swp).val }) | ||
403 | |||
404 | /* Needs to be defined here and not in linux/mm.h, as it is arch dependent */ | ||
405 | /* FIXME: this is not correct */ | ||
406 | #define kern_addr_valid(addr) (1) | ||
407 | |||
408 | #include <asm-generic/pgtable.h> | ||
409 | |||
410 | /* | ||
411 | * We provide our own arch_get_unmapped_area to cope with VIPT caches. | ||
412 | */ | ||
413 | #define HAVE_ARCH_UNMAPPED_AREA | ||
414 | |||
415 | /* | ||
416 | * remap a physical address `phys' of size `size' with page protection `prot' | ||
417 | * into virtual address `from' | ||
418 | */ | ||
419 | #define io_remap_page_range(vma,from,phys,size,prot) \ | ||
420 | remap_pfn_range(vma, from, (phys) >> PAGE_SHIFT, size, prot) | ||
421 | |||
422 | #define io_remap_pfn_range(vma,from,pfn,size,prot) \ | ||
423 | remap_pfn_range(vma, from, pfn, size, prot) | ||
424 | |||
425 | #define MK_IOSPACE_PFN(space, pfn) (pfn) | ||
426 | #define GET_IOSPACE(pfn) 0 | ||
427 | #define GET_PFN(pfn) (pfn) | ||
428 | |||
429 | #define pgtable_cache_init() do { } while (0) | ||
430 | |||
431 | #endif /* !__ASSEMBLY__ */ | ||
432 | |||
433 | #endif /* _ASMARM_PGTABLE_H */ | ||