21  * The PTE model described here is that of the Hexagon Virtual Machine,
30  * To maximize the comfort level for the PTE manipulation macros,
39  * We have a total of 4 "soft" bits available in the abstract PTE.
43  * the PTE describes MMU programming or swap space.
99 /*  Any bigger and the PTE disappears.  */
136 #define pte_mkhuge(pte) __pte((pte_val(pte) & ~0x3) | HVM_HUGEPAGE_SIZE)  argument
143 extern void sync_icache_dcache(pte_t pte);
145 #define pte_present_exec_user(pte) \  argument
146 	((pte_val(pte) & (_PAGE_EXECUTE | _PAGE_USER)) == \
160  * L1 PTE (PMD/PGD) has 7 in the least significant bits. For the L2 PTE
161  * (Linux PTE), the key is to have bits 11..9 all zero.  We'd use 0x7
174  * Conveniently, a null PTE value is invalid.
186  * MIPS checks it against that "invalid pte table" thing.
225  * pte_none - check if pte is mapped
226  * @pte: pte_t entry
228 static inline int pte_none(pte_t pte)  in pte_none()  argument
230 	return pte_val(pte) == _NULL_PTE;  in pte_none()
236 static inline int pte_present(pte_t pte)  in pte_present()  argument
238 	return pte_val(pte) & _PAGE_PRESENT;  in pte_present()
241 /* pte_page - returns a page (frame pointer/descriptor?) based on a PTE */
244 /* pte_mkold - mark PTE as not recently accessed */
245 static inline pte_t pte_mkold(pte_t pte)  in pte_mkold()  argument
247 	pte_val(pte) &= ~_PAGE_ACCESSED;  in pte_mkold()
248 	return pte;  in pte_mkold()
251 /* pte_mkyoung - mark PTE as recently accessed */
252 static inline pte_t pte_mkyoung(pte_t pte)  in pte_mkyoung()  argument
254 	pte_val(pte) |= _PAGE_ACCESSED;  in pte_mkyoung()
255 	return pte;  in pte_mkyoung()
259 static inline pte_t pte_mkclean(pte_t pte)  in pte_mkclean()  argument
261 	pte_val(pte) &= ~_PAGE_DIRTY;  in pte_mkclean()
262 	return pte;  in pte_mkclean()
266 static inline pte_t pte_mkdirty(pte_t pte)  in pte_mkdirty()  argument
268 	pte_val(pte) |= _PAGE_DIRTY;  in pte_mkdirty()
269 	return pte;  in pte_mkdirty()
272 /* pte_young - "is PTE marked as accessed"? */
273 static inline int pte_young(pte_t pte)  in pte_young()  argument
275 	return pte_val(pte) & _PAGE_ACCESSED;  in pte_young()
278 /* pte_dirty - "is PTE dirty?" */
279 static inline int pte_dirty(pte_t pte)  in pte_dirty()  argument
281 	return pte_val(pte) & _PAGE_DIRTY;  in pte_dirty()
284 /* pte_modify - set protection bits on PTE */
285 static inline pte_t pte_modify(pte_t pte, pgprot_t prot)  in pte_modify()  argument
287 	pte_val(pte) &= PAGE_MASK;  in pte_modify()
288 	pte_val(pte) |= pgprot_val(prot);  in pte_modify()
289 	return pte;  in pte_modify()
293 static inline pte_t pte_wrprotect(pte_t pte)  in pte_wrprotect()  argument
295 	pte_val(pte) &= ~_PAGE_WRITE;  in pte_wrprotect()
296 	return pte;  in pte_wrprotect()
300 static inline pte_t pte_mkwrite_novma(pte_t pte)  in pte_mkwrite_novma()  argument
302 	pte_val(pte) |= _PAGE_WRITE;  in pte_mkwrite_novma()
303 	return pte;  in pte_mkwrite_novma()
306 /* pte_mkexec - mark PTE as executable */
307 static inline pte_t pte_mkexec(pte_t pte)  in pte_mkexec()  argument
309 	pte_val(pte) |= _PAGE_EXECUTE;  in pte_mkexec()
310 	return pte;  in pte_mkexec()
313 /* pte_read - "is PTE marked as readable?" */
314 static inline int pte_read(pte_t pte)  in pte_read()  argument
316 	return pte_val(pte) & _PAGE_READ;  in pte_read()
319 /* pte_write - "is PTE marked as writable?" */
320 static inline int pte_write(pte_t pte)  in pte_write()  argument
322 	return pte_val(pte) & _PAGE_WRITE;  in pte_write()
326 /* pte_exec - "is PTE marked as executable?" */
327 static inline int pte_exec(pte_t pte)  in pte_exec()  argument
329 	return pte_val(pte) & _PAGE_EXECUTE;  in pte_exec()
332 /* __pte_to_swp_entry - extract swap entry from PTE */
333 #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })  argument
335 /* __swp_entry_to_pte - extract PTE from swap entry */
342 /* pte_pfn - convert pte to page frame number */
343 #define pte_pfn(pte) (pte_val(pte) >> PAGE_SHIFT)  argument
358  * Swap/file PTE definitions.  If _PAGE_PRESENT is zero, the rest of the PTE is
367  * Format of swap PTE:
390 static inline bool pte_swp_exclusive(pte_t pte)  in pte_swp_exclusive()  argument
392 	return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;  in pte_swp_exclusive()
395 static inline pte_t pte_swp_mkexclusive(pte_t pte)  in pte_swp_mkexclusive()  argument
397 	pte_val(pte) |= _PAGE_SWP_EXCLUSIVE;  in pte_swp_mkexclusive()
398 	return pte;  in pte_swp_mkexclusive()
401 static inline pte_t pte_swp_clear_exclusive(pte_t pte)  in pte_swp_clear_exclusive()  argument
403 	pte_val(pte) &= ~_PAGE_SWP_EXCLUSIVE;  in pte_swp_clear_exclusive()
404 	return pte;  in pte_swp_clear_exclusive()