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Wed Mar 4 11:03:09 2009 UTC (15 years, 3 months ago) by niro
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Wed Mar 4 11:03:09 2009 UTC (15 years, 3 months ago) by niro
File MIME type: text/plain
File size: 11257 byte(s)
Tag kernel26-2.6.12-alx-r9
1 | #ifndef _ASM_M32R_PGTABLE_H |
2 | #define _ASM_M32R_PGTABLE_H |
3 | |
4 | #include <asm-generic/4level-fixup.h> |
5 | |
6 | #ifdef __KERNEL__ |
7 | /* |
8 | * The Linux memory management assumes a three-level page table setup. On |
9 | * the M32R, we use that, but "fold" the mid level into the top-level page |
10 | * table, so that we physically have the same two-level page table as the |
11 | * M32R mmu expects. |
12 | * |
13 | * This file contains the functions and defines necessary to modify and use |
14 | * the M32R page table tree. |
15 | */ |
16 | |
17 | /* CAUTION!: If you change macro definitions in this file, you might have to |
18 | * change arch/m32r/mmu.S manually. |
19 | */ |
20 | |
21 | #ifndef __ASSEMBLY__ |
22 | |
23 | #include <linux/config.h> |
24 | #include <linux/threads.h> |
25 | #include <asm/processor.h> |
26 | #include <asm/addrspace.h> |
27 | #include <asm/bitops.h> |
28 | #include <asm/page.h> |
29 | |
30 | extern pgd_t swapper_pg_dir[1024]; |
31 | extern void paging_init(void); |
32 | |
33 | /* |
34 | * ZERO_PAGE is a global shared page that is always zero: used |
35 | * for zero-mapped memory areas etc.. |
36 | */ |
37 | extern unsigned long empty_zero_page[1024]; |
38 | #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) |
39 | |
40 | #endif /* !__ASSEMBLY__ */ |
41 | |
42 | #ifndef __ASSEMBLY__ |
43 | #include <asm/pgtable-2level.h> |
44 | #endif |
45 | |
46 | #define pgtable_cache_init() do { } while (0) |
47 | |
48 | #define PMD_SIZE (1UL << PMD_SHIFT) |
49 | #define PMD_MASK (~(PMD_SIZE - 1)) |
50 | #define PGDIR_SIZE (1UL << PGDIR_SHIFT) |
51 | #define PGDIR_MASK (~(PGDIR_SIZE - 1)) |
52 | |
53 | #define USER_PTRS_PER_PGD (TASK_SIZE / PGDIR_SIZE) |
54 | #define FIRST_USER_ADDRESS 0 |
55 | |
56 | #ifndef __ASSEMBLY__ |
57 | /* Just any arbitrary offset to the start of the vmalloc VM area: the |
58 | * current 8MB value just means that there will be a 8MB "hole" after the |
59 | * physical memory until the kernel virtual memory starts. That means that |
60 | * any out-of-bounds memory accesses will hopefully be caught. |
61 | * The vmalloc() routines leaves a hole of 4kB between each vmalloced |
62 | * area for the same reason. ;) |
63 | */ |
64 | #define VMALLOC_START KSEG2 |
65 | #define VMALLOC_END KSEG3 |
66 | |
67 | /* |
68 | * M32R TLB format |
69 | * |
70 | * [0] [1:19] [20:23] [24:31] |
71 | * +-----------------------+----+-------------+ |
72 | * | VPN |0000| ASID | |
73 | * +-----------------------+----+-------------+ |
74 | * +-+---------------------+----+-+---+-+-+-+-+ |
75 | * |0 PPN |0000|N|AC |L|G|V| | |
76 | * +-+---------------------+----+-+---+-+-+-+-+ |
77 | * RWX |
78 | */ |
79 | |
80 | #define _PAGE_BIT_DIRTY 0 /* software: page changed */ |
81 | #define _PAGE_BIT_FILE 0 /* when !present: nonlinear file |
82 | mapping */ |
83 | #define _PAGE_BIT_PRESENT 1 /* Valid: page is valid */ |
84 | #define _PAGE_BIT_GLOBAL 2 /* Global */ |
85 | #define _PAGE_BIT_LARGE 3 /* Large */ |
86 | #define _PAGE_BIT_EXEC 4 /* Execute */ |
87 | #define _PAGE_BIT_WRITE 5 /* Write */ |
88 | #define _PAGE_BIT_READ 6 /* Read */ |
89 | #define _PAGE_BIT_NONCACHABLE 7 /* Non cachable */ |
90 | #define _PAGE_BIT_ACCESSED 8 /* software: page referenced */ |
91 | #define _PAGE_BIT_PROTNONE 9 /* software: if not present */ |
92 | |
93 | #define _PAGE_DIRTY (1UL << _PAGE_BIT_DIRTY) |
94 | #define _PAGE_FILE (1UL << _PAGE_BIT_FILE) |
95 | #define _PAGE_PRESENT (1UL << _PAGE_BIT_PRESENT) |
96 | #define _PAGE_GLOBAL (1UL << _PAGE_BIT_GLOBAL) |
97 | #define _PAGE_LARGE (1UL << _PAGE_BIT_LARGE) |
98 | #define _PAGE_EXEC (1UL << _PAGE_BIT_EXEC) |
99 | #define _PAGE_WRITE (1UL << _PAGE_BIT_WRITE) |
100 | #define _PAGE_READ (1UL << _PAGE_BIT_READ) |
101 | #define _PAGE_NONCACHABLE (1UL << _PAGE_BIT_NONCACHABLE) |
102 | #define _PAGE_ACCESSED (1UL << _PAGE_BIT_ACCESSED) |
103 | #define _PAGE_PROTNONE (1UL << _PAGE_BIT_PROTNONE) |
104 | |
105 | #define _PAGE_TABLE \ |
106 | ( _PAGE_PRESENT | _PAGE_WRITE | _PAGE_READ | _PAGE_ACCESSED \ |
107 | | _PAGE_DIRTY ) |
108 | #define _KERNPG_TABLE \ |
109 | ( _PAGE_PRESENT | _PAGE_WRITE | _PAGE_READ | _PAGE_ACCESSED \ |
110 | | _PAGE_DIRTY ) |
111 | #define _PAGE_CHG_MASK \ |
112 | ( PTE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY ) |
113 | |
114 | #ifdef CONFIG_MMU |
115 | #define PAGE_NONE \ |
116 | __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED) |
117 | #define PAGE_SHARED \ |
118 | __pgprot(_PAGE_PRESENT | _PAGE_WRITE | _PAGE_READ | _PAGE_ACCESSED) |
119 | #define PAGE_SHARED_EXEC \ |
120 | __pgprot(_PAGE_PRESENT | _PAGE_EXEC | _PAGE_WRITE | _PAGE_READ \ |
121 | | _PAGE_ACCESSED) |
122 | #define PAGE_COPY \ |
123 | __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_ACCESSED) |
124 | #define PAGE_COPY_EXEC \ |
125 | __pgprot(_PAGE_PRESENT | _PAGE_EXEC | _PAGE_READ | _PAGE_ACCESSED) |
126 | #define PAGE_READONLY \ |
127 | __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_ACCESSED) |
128 | #define PAGE_READONLY_EXEC \ |
129 | __pgprot(_PAGE_PRESENT | _PAGE_EXEC | _PAGE_READ | _PAGE_ACCESSED) |
130 | |
131 | #define __PAGE_KERNEL \ |
132 | ( _PAGE_PRESENT | _PAGE_EXEC | _PAGE_WRITE | _PAGE_READ | _PAGE_DIRTY \ |
133 | | _PAGE_ACCESSED ) |
134 | #define __PAGE_KERNEL_RO ( __PAGE_KERNEL & ~_PAGE_WRITE ) |
135 | #define __PAGE_KERNEL_NOCACHE ( __PAGE_KERNEL | _PAGE_NONCACHABLE) |
136 | |
137 | #define MAKE_GLOBAL(x) __pgprot((x) | _PAGE_GLOBAL) |
138 | |
139 | #define PAGE_KERNEL MAKE_GLOBAL(__PAGE_KERNEL) |
140 | #define PAGE_KERNEL_RO MAKE_GLOBAL(__PAGE_KERNEL_RO) |
141 | #define PAGE_KERNEL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_NOCACHE) |
142 | |
143 | #else |
144 | #define PAGE_NONE __pgprot(0) |
145 | #define PAGE_SHARED __pgprot(0) |
146 | #define PAGE_SHARED_EXEC __pgprot(0) |
147 | #define PAGE_COPY __pgprot(0) |
148 | #define PAGE_COPY_EXEC __pgprot(0) |
149 | #define PAGE_READONLY __pgprot(0) |
150 | #define PAGE_READONLY_EXEC __pgprot(0) |
151 | |
152 | #define PAGE_KERNEL __pgprot(0) |
153 | #define PAGE_KERNEL_RO __pgprot(0) |
154 | #define PAGE_KERNEL_NOCACHE __pgprot(0) |
155 | #endif /* CONFIG_MMU */ |
156 | |
157 | /* xwr */ |
158 | #define __P000 PAGE_NONE |
159 | #define __P001 PAGE_READONLY |
160 | #define __P010 PAGE_COPY |
161 | #define __P011 PAGE_COPY |
162 | #define __P100 PAGE_READONLY_EXEC |
163 | #define __P101 PAGE_READONLY_EXEC |
164 | #define __P110 PAGE_COPY_EXEC |
165 | #define __P111 PAGE_COPY_EXEC |
166 | |
167 | #define __S000 PAGE_NONE |
168 | #define __S001 PAGE_READONLY |
169 | #define __S010 PAGE_SHARED |
170 | #define __S011 PAGE_SHARED |
171 | #define __S100 PAGE_READONLY_EXEC |
172 | #define __S101 PAGE_READONLY_EXEC |
173 | #define __S110 PAGE_SHARED_EXEC |
174 | #define __S111 PAGE_SHARED_EXEC |
175 | |
176 | /* page table for 0-4MB for everybody */ |
177 | |
178 | #define pte_present(x) (pte_val(x) & (_PAGE_PRESENT | _PAGE_PROTNONE)) |
179 | #define pte_clear(mm,addr,xp) do { set_pte_at(mm, addr, xp, __pte(0)); } while (0) |
180 | |
181 | #define pmd_none(x) (!pmd_val(x)) |
182 | #define pmd_present(x) (pmd_val(x) & _PAGE_PRESENT) |
183 | #define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0) |
184 | #define pmd_bad(x) ((pmd_val(x) & ~PAGE_MASK) != _KERNPG_TABLE) |
185 | |
186 | #define pages_to_mb(x) ((x) >> (20 - PAGE_SHIFT)) |
187 | |
188 | /* |
189 | * The following only work if pte_present() is true. |
190 | * Undefined behaviour if not.. |
191 | */ |
192 | static inline int pte_read(pte_t pte) |
193 | { |
194 | return pte_val(pte) & _PAGE_READ; |
195 | } |
196 | |
197 | static inline int pte_exec(pte_t pte) |
198 | { |
199 | return pte_val(pte) & _PAGE_EXEC; |
200 | } |
201 | |
202 | static inline int pte_dirty(pte_t pte) |
203 | { |
204 | return pte_val(pte) & _PAGE_DIRTY; |
205 | } |
206 | |
207 | static inline int pte_young(pte_t pte) |
208 | { |
209 | return pte_val(pte) & _PAGE_ACCESSED; |
210 | } |
211 | |
212 | static inline int pte_write(pte_t pte) |
213 | { |
214 | return pte_val(pte) & _PAGE_WRITE; |
215 | } |
216 | |
217 | /* |
218 | * The following only works if pte_present() is not true. |
219 | */ |
220 | static inline int pte_file(pte_t pte) |
221 | { |
222 | return pte_val(pte) & _PAGE_FILE; |
223 | } |
224 | |
225 | static inline pte_t pte_rdprotect(pte_t pte) |
226 | { |
227 | pte_val(pte) &= ~_PAGE_READ; |
228 | return pte; |
229 | } |
230 | |
231 | static inline pte_t pte_exprotect(pte_t pte) |
232 | { |
233 | pte_val(pte) &= ~_PAGE_EXEC; |
234 | return pte; |
235 | } |
236 | |
237 | static inline pte_t pte_mkclean(pte_t pte) |
238 | { |
239 | pte_val(pte) &= ~_PAGE_DIRTY; |
240 | return pte; |
241 | } |
242 | |
243 | static inline pte_t pte_mkold(pte_t pte) |
244 | { |
245 | pte_val(pte) &= ~_PAGE_ACCESSED; |
246 | return pte; |
247 | } |
248 | |
249 | static inline pte_t pte_wrprotect(pte_t pte) |
250 | { |
251 | pte_val(pte) &= ~_PAGE_WRITE; |
252 | return pte; |
253 | } |
254 | |
255 | static inline pte_t pte_mkread(pte_t pte) |
256 | { |
257 | pte_val(pte) |= _PAGE_READ; |
258 | return pte; |
259 | } |
260 | |
261 | static inline pte_t pte_mkexec(pte_t pte) |
262 | { |
263 | pte_val(pte) |= _PAGE_EXEC; |
264 | return pte; |
265 | } |
266 | |
267 | static inline pte_t pte_mkdirty(pte_t pte) |
268 | { |
269 | pte_val(pte) |= _PAGE_DIRTY; |
270 | return pte; |
271 | } |
272 | |
273 | static inline pte_t pte_mkyoung(pte_t pte) |
274 | { |
275 | pte_val(pte) |= _PAGE_ACCESSED; |
276 | return pte; |
277 | } |
278 | |
279 | static inline pte_t pte_mkwrite(pte_t pte) |
280 | { |
281 | pte_val(pte) |= _PAGE_WRITE; |
282 | return pte; |
283 | } |
284 | |
285 | static inline int ptep_test_and_clear_dirty(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep) |
286 | { |
287 | return test_and_clear_bit(_PAGE_BIT_DIRTY, ptep); |
288 | } |
289 | |
290 | static inline int ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep) |
291 | { |
292 | return test_and_clear_bit(_PAGE_BIT_ACCESSED, ptep); |
293 | } |
294 | |
295 | static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep) |
296 | { |
297 | clear_bit(_PAGE_BIT_WRITE, ptep); |
298 | } |
299 | |
300 | /* |
301 | * Macro and implementation to make a page protection as uncachable. |
302 | */ |
303 | static inline pgprot_t pgprot_noncached(pgprot_t _prot) |
304 | { |
305 | unsigned long prot = pgprot_val(_prot); |
306 | |
307 | prot |= _PAGE_NONCACHABLE; |
308 | return __pgprot(prot); |
309 | } |
310 | |
311 | #define pgprot_writecombine(prot) pgprot_noncached(prot) |
312 | |
313 | /* |
314 | * Conversion functions: convert a page and protection to a page entry, |
315 | * and a page entry and page directory to the page they refer to. |
316 | */ |
317 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), pgprot) |
318 | |
319 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
320 | { |
321 | set_pte(&pte, __pte((pte_val(pte) & _PAGE_CHG_MASK) \ |
322 | | pgprot_val(newprot))); |
323 | |
324 | return pte; |
325 | } |
326 | |
327 | #define page_pte(page) page_pte_prot(page, __pgprot(0)) |
328 | |
329 | /* |
330 | * Conversion functions: convert a page and protection to a page entry, |
331 | * and a page entry and page directory to the page they refer to. |
332 | */ |
333 | |
334 | static inline void pmd_set(pmd_t * pmdp, pte_t * ptep) |
335 | { |
336 | pmd_val(*pmdp) = (((unsigned long) ptep) & PAGE_MASK); |
337 | } |
338 | |
339 | #define pmd_page_kernel(pmd) \ |
340 | ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK)) |
341 | |
342 | #ifndef CONFIG_DISCONTIGMEM |
343 | #define pmd_page(pmd) (mem_map + ((pmd_val(pmd) >> PAGE_SHIFT) - PFN_BASE)) |
344 | #endif /* !CONFIG_DISCONTIGMEM */ |
345 | |
346 | /* to find an entry in a page-table-directory. */ |
347 | #define pgd_index(address) \ |
348 | (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) |
349 | |
350 | #define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address)) |
351 | |
352 | /* to find an entry in a kernel page-table-directory */ |
353 | #define pgd_offset_k(address) pgd_offset(&init_mm, address) |
354 | |
355 | #define pmd_index(address) \ |
356 | (((address) >> PMD_SHIFT) & (PTRS_PER_PMD - 1)) |
357 | |
358 | #define pte_index(address) \ |
359 | (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) |
360 | #define pte_offset_kernel(dir, address) \ |
361 | ((pte_t *)pmd_page_kernel(*(dir)) + pte_index(address)) |
362 | #define pte_offset_map(dir, address) \ |
363 | ((pte_t *)page_address(pmd_page(*(dir))) + pte_index(address)) |
364 | #define pte_offset_map_nested(dir, address) pte_offset_map(dir, address) |
365 | #define pte_unmap(pte) do { } while (0) |
366 | #define pte_unmap_nested(pte) do { } while (0) |
367 | |
368 | /* Encode and de-code a swap entry */ |
369 | #define __swp_type(x) (((x).val >> 2) & 0x3f) |
370 | #define __swp_offset(x) ((x).val >> 10) |
371 | #define __swp_entry(type, offset) \ |
372 | ((swp_entry_t) { ((type) << 2) | ((offset) << 10) }) |
373 | #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) |
374 | #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) |
375 | |
376 | #endif /* !__ASSEMBLY__ */ |
377 | |
378 | /* Needs to be defined here and not in linux/mm.h, as it is arch dependent */ |
379 | #define kern_addr_valid(addr) (1) |
380 | |
381 | #define io_remap_page_range(vma, vaddr, paddr, size, prot) \ |
382 | remap_pfn_range(vma, vaddr, (paddr) >> PAGE_SHIFT, size, prot) |
383 | |
384 | #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \ |
385 | remap_pfn_range(vma, vaddr, pfn, size, prot) |
386 | |
387 | #define MK_IOSPACE_PFN(space, pfn) (pfn) |
388 | #define GET_IOSPACE(pfn) 0 |
389 | #define GET_PFN(pfn) (pfn) |
390 | |
391 | #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG |
392 | #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY |
393 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR |
394 | #define __HAVE_ARCH_PTEP_SET_WRPROTECT |
395 | #define __HAVE_ARCH_PTE_SAME |
396 | #include <asm-generic/pgtable.h> |
397 | |
398 | #endif /* __KERNEL__ */ |
399 | |
400 | #endif /* _ASM_M32R_PGTABLE_H */ |