~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/arch/m68k/include/asm/mcf_pgtable.h

Version: ~ [ linux-5.16-rc3 ] ~ [ linux-5.15.5 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.82 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.162 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.218 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.256 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.291 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.293 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.18.140 ] ~ [ linux-3.16.85 ] ~ [ linux-3.14.79 ] ~ [ linux-3.12.74 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 #ifndef _MCF_PGTABLE_H
  2 #define _MCF_PGTABLE_H
  3 
  4 #include <asm/mcfmmu.h>
  5 #include <asm/page.h>
  6 
  7 /*
  8  * MMUDR bits, in proper place. We write these directly into the MMUDR
  9  * after masking from the pte.
 10  */
 11 #define CF_PAGE_LOCKED          MMUDR_LK        /* 0x00000002 */
 12 #define CF_PAGE_EXEC            MMUDR_X         /* 0x00000004 */
 13 #define CF_PAGE_WRITABLE        MMUDR_W         /* 0x00000008 */
 14 #define CF_PAGE_READABLE        MMUDR_R         /* 0x00000010 */
 15 #define CF_PAGE_SYSTEM          MMUDR_SP        /* 0x00000020 */
 16 #define CF_PAGE_COPYBACK        MMUDR_CM_CCB    /* 0x00000040 */
 17 #define CF_PAGE_NOCACHE         MMUDR_CM_NCP    /* 0x00000080 */
 18 
 19 #define CF_CACHEMASK            (~MMUDR_CM_CCB)
 20 #define CF_PAGE_MMUDR_MASK      0x000000fe
 21 
 22 #define _PAGE_NOCACHE030        CF_PAGE_NOCACHE
 23 
 24 /*
 25  * MMUTR bits, need shifting down.
 26  */
 27 #define CF_PAGE_MMUTR_MASK      0x00000c00
 28 #define CF_PAGE_MMUTR_SHIFT     10
 29 
 30 #define CF_PAGE_VALID           (MMUTR_V << CF_PAGE_MMUTR_SHIFT)
 31 #define CF_PAGE_SHARED          (MMUTR_SG << CF_PAGE_MMUTR_SHIFT)
 32 
 33 /*
 34  * Fake bits, not implemented in CF, will get masked out before
 35  * hitting hardware.
 36  */
 37 #define CF_PAGE_DIRTY           0x00000001
 38 #define CF_PAGE_ACCESSED        0x00001000
 39 
 40 #define _PAGE_CACHE040          0x020   /* 68040 cache mode, cachable, copyback */
 41 #define _PAGE_NOCACHE_S         0x040   /* 68040 no-cache mode, serialized */
 42 #define _PAGE_NOCACHE           0x060   /* 68040 cache mode, non-serialized */
 43 #define _PAGE_CACHE040W         0x000   /* 68040 cache mode, cachable, write-through */
 44 #define _DESCTYPE_MASK          0x003
 45 #define _CACHEMASK040           (~0x060)
 46 #define _PAGE_GLOBAL040         0x400   /* 68040 global bit, used for kva descs */
 47 
 48 /*
 49  * Externally used page protection values.
 50  */
 51 #define _PAGE_PRESENT   (CF_PAGE_VALID)
 52 #define _PAGE_ACCESSED  (CF_PAGE_ACCESSED)
 53 #define _PAGE_DIRTY     (CF_PAGE_DIRTY)
 54 #define _PAGE_READWRITE (CF_PAGE_READABLE \
 55                                 | CF_PAGE_WRITABLE \
 56                                 | CF_PAGE_SYSTEM \
 57                                 | CF_PAGE_SHARED)
 58 
 59 /*
 60  * Compound page protection values.
 61  */
 62 #define PAGE_NONE       __pgprot(CF_PAGE_VALID \
 63                                  | CF_PAGE_ACCESSED)
 64 
 65 #define PAGE_SHARED     __pgprot(CF_PAGE_VALID \
 66                                  | CF_PAGE_ACCESSED \
 67                                  | CF_PAGE_SHARED)
 68 
 69 #define PAGE_INIT       __pgprot(CF_PAGE_VALID \
 70                                  | CF_PAGE_READABLE \
 71                                  | CF_PAGE_WRITABLE \
 72                                  | CF_PAGE_EXEC \
 73                                  | CF_PAGE_SYSTEM)
 74 
 75 #define PAGE_KERNEL     __pgprot(CF_PAGE_VALID \
 76                                  | CF_PAGE_ACCESSED \
 77                                  | CF_PAGE_READABLE \
 78                                  | CF_PAGE_WRITABLE \
 79                                  | CF_PAGE_EXEC \
 80                                  | CF_PAGE_SYSTEM \
 81                                  | CF_PAGE_SHARED)
 82 
 83 #define PAGE_COPY       __pgprot(CF_PAGE_VALID \
 84                                  | CF_PAGE_ACCESSED \
 85                                  | CF_PAGE_READABLE \
 86                                  | CF_PAGE_DIRTY)
 87 
 88 /*
 89  * Page protections for initialising protection_map. See mm/mmap.c
 90  * for use. In general, the bit positions are xwr, and P-items are
 91  * private, the S-items are shared.
 92  */
 93 #define __P000          PAGE_NONE
 94 #define __P001          __pgprot(CF_PAGE_VALID \
 95                                  | CF_PAGE_ACCESSED \
 96                                  | CF_PAGE_READABLE)
 97 #define __P010          __pgprot(CF_PAGE_VALID \
 98                                  | CF_PAGE_ACCESSED \
 99                                  | CF_PAGE_WRITABLE)
100 #define __P011          __pgprot(CF_PAGE_VALID \
101                                  | CF_PAGE_ACCESSED \
102                                  | CF_PAGE_READABLE \
103                                  | CF_PAGE_WRITABLE)
104 #define __P100          __pgprot(CF_PAGE_VALID \
105                                  | CF_PAGE_ACCESSED \
106                                  | CF_PAGE_EXEC)
107 #define __P101          __pgprot(CF_PAGE_VALID \
108                                  | CF_PAGE_ACCESSED \
109                                  | CF_PAGE_READABLE \
110                                  | CF_PAGE_EXEC)
111 #define __P110          __pgprot(CF_PAGE_VALID \
112                                  | CF_PAGE_ACCESSED \
113                                  | CF_PAGE_WRITABLE \
114                                  | CF_PAGE_EXEC)
115 #define __P111          __pgprot(CF_PAGE_VALID \
116                                  | CF_PAGE_ACCESSED \
117                                  | CF_PAGE_READABLE \
118                                  | CF_PAGE_WRITABLE \
119                                  | CF_PAGE_EXEC)
120 
121 #define __S000          PAGE_NONE
122 #define __S001          __pgprot(CF_PAGE_VALID \
123                                  | CF_PAGE_ACCESSED \
124                                  | CF_PAGE_READABLE)
125 #define __S010          PAGE_SHARED
126 #define __S011          __pgprot(CF_PAGE_VALID \
127                                  | CF_PAGE_ACCESSED \
128                                  | CF_PAGE_SHARED \
129                                  | CF_PAGE_READABLE)
130 #define __S100          __pgprot(CF_PAGE_VALID \
131                                  | CF_PAGE_ACCESSED \
132                                  | CF_PAGE_EXEC)
133 #define __S101          __pgprot(CF_PAGE_VALID \
134                                  | CF_PAGE_ACCESSED \
135                                  | CF_PAGE_READABLE \
136                                  | CF_PAGE_EXEC)
137 #define __S110          __pgprot(CF_PAGE_VALID \
138                                  | CF_PAGE_ACCESSED \
139                                  | CF_PAGE_SHARED \
140                                  | CF_PAGE_EXEC)
141 #define __S111          __pgprot(CF_PAGE_VALID \
142                                  | CF_PAGE_ACCESSED \
143                                  | CF_PAGE_SHARED \
144                                  | CF_PAGE_READABLE \
145                                  | CF_PAGE_EXEC)
146 
147 #define PTE_MASK        PAGE_MASK
148 #define CF_PAGE_CHG_MASK (PTE_MASK | CF_PAGE_ACCESSED | CF_PAGE_DIRTY)
149 
150 #ifndef __ASSEMBLY__
151 
152 /*
153  * Conversion functions: convert a page and protection to a page entry,
154  * and a page entry and page directory to the page they refer to.
155  */
156 #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
157 
158 static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
159 {
160         pte_val(pte) = (pte_val(pte) & CF_PAGE_CHG_MASK) | pgprot_val(newprot);
161         return pte;
162 }
163 
164 #define pmd_set(pmdp, ptep) do {} while (0)
165 
166 static inline void pgd_set(pgd_t *pgdp, pmd_t *pmdp)
167 {
168         pgd_val(*pgdp) = virt_to_phys(pmdp);
169 }
170 
171 #define __pte_page(pte) ((unsigned long) (pte_val(pte) & PAGE_MASK))
172 #define __pmd_page(pmd) ((unsigned long) (pmd_val(pmd)))
173 
174 static inline int pte_none(pte_t pte)
175 {
176         return !pte_val(pte);
177 }
178 
179 static inline int pte_present(pte_t pte)
180 {
181         return pte_val(pte) & CF_PAGE_VALID;
182 }
183 
184 static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
185         pte_t *ptep)
186 {
187         pte_val(*ptep) = 0;
188 }
189 
190 #define pte_pagenr(pte) ((__pte_page(pte) - PAGE_OFFSET) >> PAGE_SHIFT)
191 #define pte_page(pte)   virt_to_page(__pte_page(pte))
192 
193 static inline int pmd_none2(pmd_t *pmd) { return !pmd_val(*pmd); }
194 #define pmd_none(pmd) pmd_none2(&(pmd))
195 static inline int pmd_bad2(pmd_t *pmd) { return 0; }
196 #define pmd_bad(pmd) pmd_bad2(&(pmd))
197 #define pmd_present(pmd) (!pmd_none2(&(pmd)))
198 static inline void pmd_clear(pmd_t *pmdp) { pmd_val(*pmdp) = 0; }
199 
200 static inline int pgd_none(pgd_t pgd) { return 0; }
201 static inline int pgd_bad(pgd_t pgd) { return 0; }
202 static inline int pgd_present(pgd_t pgd) { return 1; }
203 static inline void pgd_clear(pgd_t *pgdp) {}
204 
205 #define pte_ERROR(e) \
206         printk(KERN_ERR "%s:%d: bad pte %08lx.\n",      \
207         __FILE__, __LINE__, pte_val(e))
208 #define pmd_ERROR(e) \
209         printk(KERN_ERR "%s:%d: bad pmd %08lx.\n",      \
210         __FILE__, __LINE__, pmd_val(e))
211 #define pgd_ERROR(e) \
212         printk(KERN_ERR "%s:%d: bad pgd %08lx.\n",      \
213         __FILE__, __LINE__, pgd_val(e))
214 
215 /*
216  * The following only work if pte_present() is true.
217  * Undefined behaviour if not...
218  * [we have the full set here even if they don't change from m68k]
219  */
220 static inline int pte_read(pte_t pte)
221 {
222         return pte_val(pte) & CF_PAGE_READABLE;
223 }
224 
225 static inline int pte_write(pte_t pte)
226 {
227         return pte_val(pte) & CF_PAGE_WRITABLE;
228 }
229 
230 static inline int pte_exec(pte_t pte)
231 {
232         return pte_val(pte) & CF_PAGE_EXEC;
233 }
234 
235 static inline int pte_dirty(pte_t pte)
236 {
237         return pte_val(pte) & CF_PAGE_DIRTY;
238 }
239 
240 static inline int pte_young(pte_t pte)
241 {
242         return pte_val(pte) & CF_PAGE_ACCESSED;
243 }
244 
245 static inline int pte_special(pte_t pte)
246 {
247         return 0;
248 }
249 
250 static inline pte_t pte_wrprotect(pte_t pte)
251 {
252         pte_val(pte) &= ~CF_PAGE_WRITABLE;
253         return pte;
254 }
255 
256 static inline pte_t pte_rdprotect(pte_t pte)
257 {
258         pte_val(pte) &= ~CF_PAGE_READABLE;
259         return pte;
260 }
261 
262 static inline pte_t pte_exprotect(pte_t pte)
263 {
264         pte_val(pte) &= ~CF_PAGE_EXEC;
265         return pte;
266 }
267 
268 static inline pte_t pte_mkclean(pte_t pte)
269 {
270         pte_val(pte) &= ~CF_PAGE_DIRTY;
271         return pte;
272 }
273 
274 static inline pte_t pte_mkold(pte_t pte)
275 {
276         pte_val(pte) &= ~CF_PAGE_ACCESSED;
277         return pte;
278 }
279 
280 static inline pte_t pte_mkwrite(pte_t pte)
281 {
282         pte_val(pte) |= CF_PAGE_WRITABLE;
283         return pte;
284 }
285 
286 static inline pte_t pte_mkread(pte_t pte)
287 {
288         pte_val(pte) |= CF_PAGE_READABLE;
289         return pte;
290 }
291 
292 static inline pte_t pte_mkexec(pte_t pte)
293 {
294         pte_val(pte) |= CF_PAGE_EXEC;
295         return pte;
296 }
297 
298 static inline pte_t pte_mkdirty(pte_t pte)
299 {
300         pte_val(pte) |= CF_PAGE_DIRTY;
301         return pte;
302 }
303 
304 static inline pte_t pte_mkyoung(pte_t pte)
305 {
306         pte_val(pte) |= CF_PAGE_ACCESSED;
307         return pte;
308 }
309 
310 static inline pte_t pte_mknocache(pte_t pte)
311 {
312         pte_val(pte) |= 0x80 | (pte_val(pte) & ~0x40);
313         return pte;
314 }
315 
316 static inline pte_t pte_mkcache(pte_t pte)
317 {
318         pte_val(pte) &= ~CF_PAGE_NOCACHE;
319         return pte;
320 }
321 
322 static inline pte_t pte_mkspecial(pte_t pte)
323 {
324         return pte;
325 }
326 
327 #define swapper_pg_dir kernel_pg_dir
328 extern pgd_t kernel_pg_dir[PTRS_PER_PGD];
329 
330 /*
331  * Find an entry in a pagetable directory.
332  */
333 #define pgd_index(address)      ((address) >> PGDIR_SHIFT)
334 #define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
335 
336 /*
337  * Find an entry in a kernel pagetable directory.
338  */
339 #define pgd_offset_k(address)   pgd_offset(&init_mm, address)
340 
341 /*
342  * Find an entry in the second-level pagetable.
343  */
344 static inline pmd_t *pmd_offset(pgd_t *pgd, unsigned long address)
345 {
346         return (pmd_t *) pgd;
347 }
348 
349 /*
350  * Find an entry in the third-level pagetable.
351  */
352 #define __pte_offset(address)   ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
353 #define pte_offset_kernel(dir, address) \
354         ((pte_t *) __pmd_page(*(dir)) + __pte_offset(address))
355 
356 /*
357  * Disable caching for page at given kernel virtual address.
358  */
359 static inline void nocache_page(void *vaddr)
360 {
361         pgd_t *dir;
362         pmd_t *pmdp;
363         pte_t *ptep;
364         unsigned long addr = (unsigned long) vaddr;
365 
366         dir = pgd_offset_k(addr);
367         pmdp = pmd_offset(dir, addr);
368         ptep = pte_offset_kernel(pmdp, addr);
369         *ptep = pte_mknocache(*ptep);
370 }
371 
372 /*
373  * Enable caching for page at given kernel virtual address.
374  */
375 static inline void cache_page(void *vaddr)
376 {
377         pgd_t *dir;
378         pmd_t *pmdp;
379         pte_t *ptep;
380         unsigned long addr = (unsigned long) vaddr;
381 
382         dir = pgd_offset_k(addr);
383         pmdp = pmd_offset(dir, addr);
384         ptep = pte_offset_kernel(pmdp, addr);
385         *ptep = pte_mkcache(*ptep);
386 }
387 
388 /*
389  * Encode and de-code a swap entry (must be !pte_none(e) && !pte_present(e))
390  */
391 #define __swp_type(x)           ((x).val & 0xFF)
392 #define __swp_offset(x)         ((x).val >> 11)
393 #define __swp_entry(typ, off)   ((swp_entry_t) { (typ) | \
394                                         (off << 11) })
395 #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
396 #define __swp_entry_to_pte(x)   (__pte((x).val))
397 
398 #define pmd_page(pmd)           (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT))
399 
400 #define pte_offset_map(pmdp, addr) ((pte_t *)__pmd_page(*pmdp) + \
401                                        __pte_offset(addr))
402 #define pte_unmap(pte)          ((void) 0)
403 #define pfn_pte(pfn, prot)      __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
404 #define pte_pfn(pte)            (pte_val(pte) >> PAGE_SHIFT)
405 
406 #endif  /* !__ASSEMBLY__ */
407 #endif  /* _MCF_PGTABLE_H */
408 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp