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6d2010ae | 1 | /* |
39037602 | 2 | * Copyright (c) 2000-2016 Apple Inc. All rights reserved. |
6d2010ae A |
3 | * |
4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ | |
5 | * | |
6 | * This file contains Original Code and/or Modifications of Original Code | |
7 | * as defined in and that are subject to the Apple Public Source License | |
8 | * Version 2.0 (the 'License'). You may not use this file except in | |
9 | * compliance with the License. The rights granted to you under the License | |
10 | * may not be used to create, or enable the creation or redistribution of, | |
11 | * unlawful or unlicensed copies of an Apple operating system, or to | |
12 | * circumvent, violate, or enable the circumvention or violation of, any | |
13 | * terms of an Apple operating system software license agreement. | |
14 | * | |
15 | * Please obtain a copy of the License at | |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. | |
17 | * | |
18 | * The Original Code and all software distributed under the License are | |
19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, | |
21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. | |
23 | * Please see the License for the specific language governing rights and | |
24 | * limitations under the License. | |
25 | * | |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ | |
27 | */ | |
28 | #include <vm/pmap.h> | |
316670eb | 29 | #include <kern/ledger.h> |
6d2010ae A |
30 | #include <i386/pmap_internal.h> |
31 | ||
316670eb | 32 | |
6d2010ae A |
33 | /* |
34 | * Each entry in the pv_head_table is locked by a bit in the | |
35 | * pv_lock_table. The lock bits are accessed by the physical | |
36 | * address of the page they lock. | |
37 | */ | |
38 | ||
39 | char *pv_lock_table; /* pointer to array of bits */ | |
40 | char *pv_hash_lock_table; | |
41 | ||
42 | pv_rooted_entry_t pv_head_table; /* array of entries, one per | |
43 | * page */ | |
44 | uint32_t pv_hashed_free_count = 0; | |
45 | uint32_t pv_hashed_kern_free_count = 0; | |
46 | ||
47 | pmap_pagetable_corruption_record_t pmap_pagetable_corruption_records[PMAP_PAGETABLE_CORRUPTION_MAX_LOG]; | |
48 | uint32_t pmap_pagetable_corruption_incidents; | |
49 | uint64_t pmap_pagetable_corruption_last_abstime = (~(0ULL) >> 1); | |
50 | uint64_t pmap_pagetable_corruption_interval_abstime; | |
51 | thread_call_t pmap_pagetable_corruption_log_call; | |
52 | static thread_call_data_t pmap_pagetable_corruption_log_call_data; | |
53 | boolean_t pmap_pagetable_corruption_timeout = FALSE; | |
54 | ||
55 | volatile uint32_t mappingrecurse = 0; | |
56 | ||
57 | uint32_t pv_hashed_low_water_mark, pv_hashed_kern_low_water_mark, pv_hashed_alloc_chunk, pv_hashed_kern_alloc_chunk; | |
58 | ||
59 | thread_t mapping_replenish_thread; | |
60 | event_t mapping_replenish_event, pmap_user_pv_throttle_event; | |
61 | ||
62 | uint64_t pmap_pv_throttle_stat, pmap_pv_throttled_waiters; | |
63 | ||
5c9f4661 | 64 | int pmap_asserts_enabled = (DEBUG); |
39037602 A |
65 | int pmap_asserts_traced = 0; |
66 | ||
6d2010ae | 67 | unsigned int pmap_cache_attributes(ppnum_t pn) { |
3e170ce0 | 68 | if (pmap_get_cache_attributes(pn, FALSE) & INTEL_PTE_NCACHE) |
6d2010ae A |
69 | return (VM_WIMG_IO); |
70 | else | |
71 | return (VM_WIMG_COPYBACK); | |
72 | } | |
73 | ||
74 | void pmap_set_cache_attributes(ppnum_t pn, unsigned int cacheattr) { | |
75 | unsigned int current, template = 0; | |
76 | int pai; | |
77 | ||
78 | if (cacheattr & VM_MEM_NOT_CACHEABLE) { | |
79 | if(!(cacheattr & VM_MEM_GUARDED)) | |
80 | template |= PHYS_PTA; | |
81 | template |= PHYS_NCACHE; | |
82 | } | |
83 | ||
84 | pmap_intr_assert(); | |
85 | ||
86 | assert((pn != vm_page_fictitious_addr) && (pn != vm_page_guard_addr)); | |
87 | ||
88 | pai = ppn_to_pai(pn); | |
89 | ||
90 | if (!IS_MANAGED_PAGE(pai)) { | |
91 | return; | |
92 | } | |
93 | ||
94 | /* override cache attributes for this phys page | |
95 | * Does not walk through existing mappings to adjust, | |
96 | * assumes page is disconnected | |
97 | */ | |
98 | ||
99 | LOCK_PVH(pai); | |
100 | ||
101 | pmap_update_cache_attributes_locked(pn, template); | |
102 | ||
103 | current = pmap_phys_attributes[pai] & PHYS_CACHEABILITY_MASK; | |
104 | pmap_phys_attributes[pai] &= ~PHYS_CACHEABILITY_MASK; | |
105 | pmap_phys_attributes[pai] |= template; | |
106 | ||
107 | UNLOCK_PVH(pai); | |
108 | ||
109 | if ((template & PHYS_NCACHE) && !(current & PHYS_NCACHE)) { | |
110 | pmap_sync_page_attributes_phys(pn); | |
111 | } | |
112 | } | |
113 | ||
3e170ce0 | 114 | unsigned pmap_get_cache_attributes(ppnum_t pn, boolean_t is_ept) { |
6d2010ae A |
115 | if (last_managed_page == 0) |
116 | return 0; | |
117 | ||
3e170ce0 A |
118 | if (!IS_MANAGED_PAGE(ppn_to_pai(pn))) |
119 | return PTE_NCACHE(is_ept); | |
6d2010ae A |
120 | |
121 | /* | |
122 | * The cache attributes are read locklessly for efficiency. | |
123 | */ | |
124 | unsigned int attr = pmap_phys_attributes[ppn_to_pai(pn)]; | |
125 | unsigned int template = 0; | |
3e170ce0 A |
126 | |
127 | /* | |
128 | * The PTA bit is currently unsupported for EPT PTEs. | |
129 | */ | |
130 | if ((attr & PHYS_PTA) && !is_ept) | |
6d2010ae | 131 | template |= INTEL_PTE_PTA; |
3e170ce0 A |
132 | |
133 | /* | |
134 | * If the page isn't marked as NCACHE, the default for EPT entries | |
135 | * is WB. | |
136 | */ | |
6d2010ae | 137 | if (attr & PHYS_NCACHE) |
3e170ce0 A |
138 | template |= PTE_NCACHE(is_ept); |
139 | else if (is_ept) | |
140 | template |= INTEL_EPT_WB; | |
141 | ||
6d2010ae A |
142 | return template; |
143 | } | |
144 | ||
3e170ce0 A |
145 | boolean_t |
146 | pmap_has_managed_page(ppnum_t first, ppnum_t last) | |
147 | { | |
5ba3f43e A |
148 | ppnum_t pn, kdata_start, kdata_end; |
149 | boolean_t result; | |
150 | boot_args * args; | |
151 | ||
152 | args = (boot_args *) PE_state.bootArgs; | |
153 | ||
154 | // Allow pages that the booter added to the end of the kernel. | |
155 | // We may miss reporting some pages in this range that were freed | |
156 | // with ml_static_free() | |
157 | kdata_start = atop_32(args->kaddr); | |
158 | kdata_end = atop_32(args->kaddr + args->ksize); | |
3e170ce0 A |
159 | |
160 | assert(last_managed_page); | |
161 | assert(first <= last); | |
162 | ||
163 | for (result = FALSE, pn = first; | |
164 | !result | |
165 | && (pn <= last) | |
166 | && (pn <= last_managed_page); | |
167 | pn++) | |
168 | { | |
5ba3f43e | 169 | if ((pn >= kdata_start) && (pn < kdata_end)) continue; |
3e170ce0 A |
170 | result = (0 != (pmap_phys_attributes[pn] & PHYS_MANAGED)); |
171 | } | |
172 | ||
173 | return (result); | |
174 | } | |
6d2010ae A |
175 | |
176 | boolean_t | |
177 | pmap_is_noencrypt(ppnum_t pn) | |
178 | { | |
179 | int pai; | |
180 | ||
181 | pai = ppn_to_pai(pn); | |
182 | ||
183 | if (!IS_MANAGED_PAGE(pai)) | |
7ddcb079 | 184 | return (FALSE); |
6d2010ae A |
185 | |
186 | if (pmap_phys_attributes[pai] & PHYS_NOENCRYPT) | |
187 | return (TRUE); | |
188 | ||
189 | return (FALSE); | |
190 | } | |
191 | ||
192 | ||
193 | void | |
194 | pmap_set_noencrypt(ppnum_t pn) | |
195 | { | |
196 | int pai; | |
197 | ||
198 | pai = ppn_to_pai(pn); | |
199 | ||
200 | if (IS_MANAGED_PAGE(pai)) { | |
201 | LOCK_PVH(pai); | |
202 | ||
203 | pmap_phys_attributes[pai] |= PHYS_NOENCRYPT; | |
204 | ||
205 | UNLOCK_PVH(pai); | |
206 | } | |
207 | } | |
208 | ||
209 | ||
210 | void | |
211 | pmap_clear_noencrypt(ppnum_t pn) | |
212 | { | |
213 | int pai; | |
214 | ||
215 | pai = ppn_to_pai(pn); | |
216 | ||
217 | if (IS_MANAGED_PAGE(pai)) { | |
7ddcb079 A |
218 | /* |
219 | * synchronization at VM layer prevents PHYS_NOENCRYPT | |
220 | * from changing state, so we don't need the lock to inspect | |
221 | */ | |
222 | if (pmap_phys_attributes[pai] & PHYS_NOENCRYPT) { | |
223 | LOCK_PVH(pai); | |
6d2010ae | 224 | |
7ddcb079 | 225 | pmap_phys_attributes[pai] &= ~PHYS_NOENCRYPT; |
6d2010ae | 226 | |
7ddcb079 A |
227 | UNLOCK_PVH(pai); |
228 | } | |
6d2010ae A |
229 | } |
230 | } | |
231 | ||
232 | void | |
233 | compute_pmap_gc_throttle(void *arg __unused) | |
234 | { | |
235 | ||
236 | } | |
237 | ||
238 | ||
fe8ab488 A |
239 | void |
240 | pmap_lock_phys_page(ppnum_t pn) | |
241 | { | |
242 | int pai; | |
243 | ||
244 | pai = ppn_to_pai(pn); | |
245 | ||
246 | if (IS_MANAGED_PAGE(pai)) { | |
247 | LOCK_PVH(pai); | |
248 | } else | |
249 | simple_lock(&phys_backup_lock); | |
250 | } | |
251 | ||
252 | ||
253 | void | |
254 | pmap_unlock_phys_page(ppnum_t pn) | |
255 | { | |
256 | int pai; | |
257 | ||
258 | pai = ppn_to_pai(pn); | |
259 | ||
260 | if (IS_MANAGED_PAGE(pai)) { | |
261 | UNLOCK_PVH(pai); | |
262 | } else | |
263 | simple_unlock(&phys_backup_lock); | |
264 | } | |
265 | ||
266 | ||
267 | ||
6d2010ae A |
268 | __private_extern__ void |
269 | pmap_pagetable_corruption_msg_log(int (*log_func)(const char * fmt, ...)__printflike(1,2)) { | |
270 | if (pmap_pagetable_corruption_incidents > 0) { | |
271 | int i, e = MIN(pmap_pagetable_corruption_incidents, PMAP_PAGETABLE_CORRUPTION_MAX_LOG); | |
272 | (*log_func)("%u pagetable corruption incident(s) detected, timeout: %u\n", pmap_pagetable_corruption_incidents, pmap_pagetable_corruption_timeout); | |
273 | for (i = 0; i < e; i++) { | |
274 | (*log_func)("Incident 0x%x, reason: 0x%x, action: 0x%x, time: 0x%llx\n", pmap_pagetable_corruption_records[i].incident, pmap_pagetable_corruption_records[i].reason, pmap_pagetable_corruption_records[i].action, pmap_pagetable_corruption_records[i].abstime); | |
275 | } | |
276 | } | |
277 | } | |
278 | ||
279 | static inline void | |
280 | pmap_pagetable_corruption_log_setup(void) { | |
281 | if (pmap_pagetable_corruption_log_call == NULL) { | |
282 | nanotime_to_absolutetime(PMAP_PAGETABLE_CORRUPTION_INTERVAL, 0, &pmap_pagetable_corruption_interval_abstime); | |
283 | thread_call_setup(&pmap_pagetable_corruption_log_call_data, | |
284 | (thread_call_func_t) pmap_pagetable_corruption_msg_log, | |
285 | (thread_call_param_t) &printf); | |
286 | pmap_pagetable_corruption_log_call = &pmap_pagetable_corruption_log_call_data; | |
287 | } | |
288 | } | |
289 | ||
290 | void | |
291 | mapping_free_prime(void) | |
292 | { | |
293 | unsigned i; | |
294 | pv_hashed_entry_t pvh_e; | |
295 | pv_hashed_entry_t pvh_eh; | |
296 | pv_hashed_entry_t pvh_et; | |
297 | int pv_cnt; | |
298 | ||
299 | /* Scale based on DRAM size */ | |
300 | pv_hashed_low_water_mark = MAX(PV_HASHED_LOW_WATER_MARK_DEFAULT, ((uint32_t)(sane_size >> 30)) * 2000); | |
301 | pv_hashed_low_water_mark = MIN(pv_hashed_low_water_mark, 16000); | |
302 | /* Alterable via sysctl */ | |
303 | pv_hashed_kern_low_water_mark = MAX(PV_HASHED_KERN_LOW_WATER_MARK_DEFAULT, ((uint32_t)(sane_size >> 30)) * 1000); | |
304 | pv_hashed_kern_low_water_mark = MIN(pv_hashed_kern_low_water_mark, 16000); | |
305 | pv_hashed_kern_alloc_chunk = PV_HASHED_KERN_ALLOC_CHUNK_INITIAL; | |
306 | pv_hashed_alloc_chunk = PV_HASHED_ALLOC_CHUNK_INITIAL; | |
307 | ||
308 | pv_cnt = 0; | |
309 | pvh_eh = pvh_et = PV_HASHED_ENTRY_NULL; | |
310 | ||
311 | for (i = 0; i < (5 * PV_HASHED_ALLOC_CHUNK_INITIAL); i++) { | |
312 | pvh_e = (pv_hashed_entry_t) zalloc(pv_hashed_list_zone); | |
313 | ||
314 | pvh_e->qlink.next = (queue_entry_t)pvh_eh; | |
315 | pvh_eh = pvh_e; | |
316 | ||
317 | if (pvh_et == PV_HASHED_ENTRY_NULL) | |
318 | pvh_et = pvh_e; | |
319 | pv_cnt++; | |
320 | } | |
321 | PV_HASHED_FREE_LIST(pvh_eh, pvh_et, pv_cnt); | |
322 | ||
323 | pv_cnt = 0; | |
324 | pvh_eh = pvh_et = PV_HASHED_ENTRY_NULL; | |
325 | for (i = 0; i < PV_HASHED_KERN_ALLOC_CHUNK_INITIAL; i++) { | |
326 | pvh_e = (pv_hashed_entry_t) zalloc(pv_hashed_list_zone); | |
327 | ||
328 | pvh_e->qlink.next = (queue_entry_t)pvh_eh; | |
329 | pvh_eh = pvh_e; | |
330 | ||
331 | if (pvh_et == PV_HASHED_ENTRY_NULL) | |
332 | pvh_et = pvh_e; | |
333 | pv_cnt++; | |
334 | } | |
335 | PV_HASHED_KERN_FREE_LIST(pvh_eh, pvh_et, pv_cnt); | |
336 | } | |
337 | ||
338 | void mapping_replenish(void); | |
339 | ||
340 | void mapping_adjust(void) { | |
341 | kern_return_t mres; | |
342 | ||
343 | pmap_pagetable_corruption_log_setup(); | |
344 | ||
345 | mres = kernel_thread_start_priority((thread_continue_t)mapping_replenish, NULL, MAXPRI_KERNEL, &mapping_replenish_thread); | |
346 | if (mres != KERN_SUCCESS) { | |
347 | panic("pmap: mapping_replenish_thread creation failed"); | |
348 | } | |
349 | thread_deallocate(mapping_replenish_thread); | |
350 | } | |
351 | ||
352 | unsigned pmap_mapping_thread_wakeups; | |
353 | unsigned pmap_kernel_reserve_replenish_stat; | |
354 | unsigned pmap_user_reserve_replenish_stat; | |
355 | unsigned pmap_kern_reserve_alloc_stat; | |
356 | ||
39037602 A |
357 | __attribute__((noreturn)) |
358 | void | |
359 | mapping_replenish(void) | |
6d2010ae A |
360 | { |
361 | pv_hashed_entry_t pvh_e; | |
362 | pv_hashed_entry_t pvh_eh; | |
363 | pv_hashed_entry_t pvh_et; | |
364 | int pv_cnt; | |
365 | unsigned i; | |
366 | ||
367 | /* We qualify for VM privileges...*/ | |
368 | current_thread()->options |= TH_OPT_VMPRIV; | |
369 | ||
370 | for (;;) { | |
371 | ||
372 | while (pv_hashed_kern_free_count < pv_hashed_kern_low_water_mark) { | |
373 | pv_cnt = 0; | |
374 | pvh_eh = pvh_et = PV_HASHED_ENTRY_NULL; | |
375 | ||
376 | for (i = 0; i < pv_hashed_kern_alloc_chunk; i++) { | |
377 | pvh_e = (pv_hashed_entry_t) zalloc(pv_hashed_list_zone); | |
378 | pvh_e->qlink.next = (queue_entry_t)pvh_eh; | |
379 | pvh_eh = pvh_e; | |
380 | ||
381 | if (pvh_et == PV_HASHED_ENTRY_NULL) | |
382 | pvh_et = pvh_e; | |
383 | pv_cnt++; | |
384 | } | |
385 | pmap_kernel_reserve_replenish_stat += pv_cnt; | |
386 | PV_HASHED_KERN_FREE_LIST(pvh_eh, pvh_et, pv_cnt); | |
387 | } | |
388 | ||
389 | pv_cnt = 0; | |
390 | pvh_eh = pvh_et = PV_HASHED_ENTRY_NULL; | |
391 | ||
392 | if (pv_hashed_free_count < pv_hashed_low_water_mark) { | |
393 | for (i = 0; i < pv_hashed_alloc_chunk; i++) { | |
394 | pvh_e = (pv_hashed_entry_t) zalloc(pv_hashed_list_zone); | |
395 | ||
396 | pvh_e->qlink.next = (queue_entry_t)pvh_eh; | |
397 | pvh_eh = pvh_e; | |
398 | ||
399 | if (pvh_et == PV_HASHED_ENTRY_NULL) | |
400 | pvh_et = pvh_e; | |
401 | pv_cnt++; | |
402 | } | |
403 | pmap_user_reserve_replenish_stat += pv_cnt; | |
404 | PV_HASHED_FREE_LIST(pvh_eh, pvh_et, pv_cnt); | |
405 | } | |
406 | /* Wake threads throttled while the kernel reserve was being replenished. | |
407 | */ | |
408 | if (pmap_pv_throttled_waiters) { | |
409 | pmap_pv_throttled_waiters = 0; | |
410 | thread_wakeup(&pmap_user_pv_throttle_event); | |
411 | } | |
412 | /* Check if the kernel pool has been depleted since the | |
413 | * first pass, to reduce refill latency. | |
414 | */ | |
415 | if (pv_hashed_kern_free_count < pv_hashed_kern_low_water_mark) | |
416 | continue; | |
417 | /* Block sans continuation to avoid yielding kernel stack */ | |
418 | assert_wait(&mapping_replenish_event, THREAD_UNINT); | |
419 | mappingrecurse = 0; | |
420 | thread_block(THREAD_CONTINUE_NULL); | |
421 | pmap_mapping_thread_wakeups++; | |
422 | } | |
423 | } | |
424 | ||
425 | /* | |
426 | * Set specified attribute bits. | |
427 | */ | |
428 | ||
429 | void | |
430 | phys_attribute_set( | |
431 | ppnum_t pn, | |
432 | int bits) | |
433 | { | |
434 | int pai; | |
435 | ||
436 | pmap_intr_assert(); | |
437 | assert(pn != vm_page_fictitious_addr); | |
438 | if (pn == vm_page_guard_addr) | |
439 | return; | |
440 | ||
441 | pai = ppn_to_pai(pn); | |
442 | ||
443 | if (!IS_MANAGED_PAGE(pai)) { | |
444 | /* Not a managed page. */ | |
445 | return; | |
446 | } | |
447 | ||
448 | LOCK_PVH(pai); | |
449 | pmap_phys_attributes[pai] |= bits; | |
450 | UNLOCK_PVH(pai); | |
451 | } | |
452 | ||
453 | /* | |
454 | * Set the modify bit on the specified physical page. | |
455 | */ | |
456 | ||
457 | void | |
458 | pmap_set_modify(ppnum_t pn) | |
459 | { | |
460 | phys_attribute_set(pn, PHYS_MODIFIED); | |
461 | } | |
462 | ||
463 | /* | |
464 | * Clear the modify bits on the specified physical page. | |
465 | */ | |
466 | ||
467 | void | |
468 | pmap_clear_modify(ppnum_t pn) | |
469 | { | |
39236c6e | 470 | phys_attribute_clear(pn, PHYS_MODIFIED, 0, NULL); |
6d2010ae A |
471 | } |
472 | ||
473 | /* | |
474 | * pmap_is_modified: | |
475 | * | |
476 | * Return whether or not the specified physical page is modified | |
477 | * by any physical maps. | |
478 | */ | |
479 | ||
480 | boolean_t | |
481 | pmap_is_modified(ppnum_t pn) | |
482 | { | |
483 | if (phys_attribute_test(pn, PHYS_MODIFIED)) | |
484 | return TRUE; | |
485 | return FALSE; | |
486 | } | |
487 | ||
488 | ||
489 | /* | |
490 | * pmap_clear_reference: | |
491 | * | |
492 | * Clear the reference bit on the specified physical page. | |
493 | */ | |
494 | ||
495 | void | |
496 | pmap_clear_reference(ppnum_t pn) | |
497 | { | |
39236c6e | 498 | phys_attribute_clear(pn, PHYS_REFERENCED, 0, NULL); |
6d2010ae A |
499 | } |
500 | ||
501 | void | |
502 | pmap_set_reference(ppnum_t pn) | |
503 | { | |
504 | phys_attribute_set(pn, PHYS_REFERENCED); | |
505 | } | |
506 | ||
507 | /* | |
508 | * pmap_is_referenced: | |
509 | * | |
510 | * Return whether or not the specified physical page is referenced | |
511 | * by any physical maps. | |
512 | */ | |
513 | ||
514 | boolean_t | |
515 | pmap_is_referenced(ppnum_t pn) | |
516 | { | |
517 | if (phys_attribute_test(pn, PHYS_REFERENCED)) | |
518 | return TRUE; | |
519 | return FALSE; | |
520 | } | |
521 | ||
522 | ||
523 | /* | |
524 | * pmap_get_refmod(phys) | |
525 | * returns the referenced and modified bits of the specified | |
526 | * physical page. | |
527 | */ | |
528 | unsigned int | |
529 | pmap_get_refmod(ppnum_t pn) | |
530 | { | |
531 | int refmod; | |
532 | unsigned int retval = 0; | |
533 | ||
534 | refmod = phys_attribute_test(pn, PHYS_MODIFIED | PHYS_REFERENCED); | |
535 | ||
536 | if (refmod & PHYS_MODIFIED) | |
537 | retval |= VM_MEM_MODIFIED; | |
538 | if (refmod & PHYS_REFERENCED) | |
539 | retval |= VM_MEM_REFERENCED; | |
540 | ||
541 | return (retval); | |
542 | } | |
543 | ||
39236c6e A |
544 | |
545 | void | |
546 | pmap_clear_refmod_options(ppnum_t pn, unsigned int mask, unsigned int options, void *arg) | |
547 | { | |
548 | unsigned int x86Mask; | |
549 | ||
550 | x86Mask = ( ((mask & VM_MEM_MODIFIED)? PHYS_MODIFIED : 0) | |
551 | | ((mask & VM_MEM_REFERENCED)? PHYS_REFERENCED : 0)); | |
552 | ||
553 | phys_attribute_clear(pn, x86Mask, options, arg); | |
554 | } | |
555 | ||
6d2010ae A |
556 | /* |
557 | * pmap_clear_refmod(phys, mask) | |
558 | * clears the referenced and modified bits as specified by the mask | |
559 | * of the specified physical page. | |
560 | */ | |
561 | void | |
562 | pmap_clear_refmod(ppnum_t pn, unsigned int mask) | |
563 | { | |
564 | unsigned int x86Mask; | |
565 | ||
566 | x86Mask = ( ((mask & VM_MEM_MODIFIED)? PHYS_MODIFIED : 0) | |
567 | | ((mask & VM_MEM_REFERENCED)? PHYS_REFERENCED : 0)); | |
39236c6e A |
568 | |
569 | phys_attribute_clear(pn, x86Mask, 0, NULL); | |
570 | } | |
571 | ||
572 | unsigned int | |
573 | pmap_disconnect(ppnum_t pa) | |
574 | { | |
575 | return (pmap_disconnect_options(pa, 0, NULL)); | |
6d2010ae A |
576 | } |
577 | ||
578 | /* | |
579 | * Routine: | |
39236c6e | 580 | * pmap_disconnect_options |
6d2010ae A |
581 | * |
582 | * Function: | |
583 | * Disconnect all mappings for this page and return reference and change status | |
584 | * in generic format. | |
585 | * | |
586 | */ | |
587 | unsigned int | |
39236c6e | 588 | pmap_disconnect_options(ppnum_t pa, unsigned int options, void *arg) |
6d2010ae A |
589 | { |
590 | unsigned refmod, vmrefmod = 0; | |
591 | ||
39236c6e | 592 | pmap_page_protect_options(pa, 0, options, arg); /* disconnect the page */ |
6d2010ae A |
593 | |
594 | pmap_assert(pa != vm_page_fictitious_addr); | |
39236c6e | 595 | if ((pa == vm_page_guard_addr) || !IS_MANAGED_PAGE(pa) || (options & PMAP_OPTIONS_NOREFMOD)) |
6d2010ae A |
596 | return 0; |
597 | refmod = pmap_phys_attributes[pa] & (PHYS_MODIFIED | PHYS_REFERENCED); | |
598 | ||
599 | if (refmod & PHYS_MODIFIED) | |
600 | vmrefmod |= VM_MEM_MODIFIED; | |
601 | if (refmod & PHYS_REFERENCED) | |
602 | vmrefmod |= VM_MEM_REFERENCED; | |
603 | ||
604 | return vmrefmod; | |
605 | } |