1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright 2019 Joyent, Inc.
24 */
25 /*
26 * Copyright (c) 2010, Intel Corporation.
27 * All rights reserved.
28 */
29
30 /*
31 * UNIX machine dependent virtual memory support.
32 */
33
34 #ifndef _VM_DEP_H
35 #define _VM_DEP_H
36
37
38 #ifdef __cplusplus
39 extern "C" {
40 #endif
41
42 #include <sys/clock.h>
43 #include <vm/hat_pte.h>
44 #include <sys/param.h>
45 #include <sys/memnode.h>
46
47 /*
48 * WARNING: vm_dep.h is included by files in common.
49 */
50
51 #define GETTICK() tsc_read()
52 /*
53 * Do not use this function for obtaining clock tick. This
54 * is called by callers who do not need to have a guarenteed
55 * correct tick value. The proper routine to use is tsc_read().
56 */
57
58 extern u_longlong_t randtick();
59 extern uint_t page_create_update_flags_x86(uint_t);
60
61 extern size_t plcnt_sz(size_t);
62 #define PLCNT_SZ(ctrs_sz) (ctrs_sz = plcnt_sz(ctrs_sz))
63
64 extern caddr_t plcnt_init(caddr_t);
65 #define PLCNT_INIT(addr) (addr = plcnt_init(addr))
66
67 extern void plcnt_inc_dec(page_t *, int, int, long, int);
68 #define PLCNT_INCR(pp, mnode, mtype, szc, flags) \
69 plcnt_inc_dec(pp, mtype, szc, 1l << PAGE_BSZS_SHIFT(szc), flags)
70 #define PLCNT_DECR(pp, mnode, mtype, szc, flags) \
71 plcnt_inc_dec(pp, mtype, szc, \
72 (long)(ULONG_MAX << PAGE_BSZS_SHIFT(szc)), flags)
73
74 /*
75 * macro to update page list max counts. no-op on x86.
76 */
77 #define PLCNT_XFER_NORELOC(pp)
78
79 /*
80 * macro to modify the page list max counts when memory is added to
81 * the page lists during startup (add_physmem) or during a DR operation
82 * when memory is added (kphysm_add_memory_dynamic) or deleted
83 * (kphysm_del_cleanup).
84 */
85 #define PLCNT_MODIFY_MAX(pfn, cnt) mtype_modify_max(pfn, cnt)
86
87 extern int memrange_num(pfn_t);
88 extern int pfn_2_mtype(pfn_t);
89 extern int mtype_func(int, int, uint_t);
90 extern void mtype_modify_max(pfn_t, long);
91 extern int mnode_pgcnt(int);
92 extern int mnode_range_cnt(int);
93
94 /*
95 * candidate counters in vm_pagelist.c are indexed by color and range
96 */
97 #define NUM_MEM_RANGES 4 /* memory range types */
98 #define MAX_MNODE_MRANGES NUM_MEM_RANGES
99 #define MNODE_RANGE_CNT(mnode) mnode_range_cnt(mnode)
100 #define MNODE_MAX_MRANGE(mnode) memrange_num(mem_node_config[mnode].physbase)
101
102 /*
103 * This was really badly defined, it implicitly uses mnode_maxmrange[]
104 * which is a static in vm_pagelist.c
105 */
106 extern int mtype_2_mrange(int);
107 #define MTYPE_2_MRANGE(mnode, mtype) \
108 (mnode_maxmrange[mnode] - mtype_2_mrange(mtype))
109
110 /*
111 * Per page size free lists. Allocated dynamically.
112 * dimensions [mtype][mmu_page_sizes][colors]
113 *
114 * mtype specifies a physical memory range with a unique mnode.
115 */
116
117 extern page_t ****page_freelists;
118
119 #define PAGE_FREELISTS(mnode, szc, color, mtype) \
120 (*(page_freelists[mtype][szc] + (color)))
121
122 /*
123 * For now there is only a single size cache list. Allocated dynamically.
124 * dimensions [mtype][colors]
125 *
126 * mtype specifies a physical memory range with a unique mnode.
127 */
128 extern page_t ***page_cachelists;
129
130 #define PAGE_CACHELISTS(mnode, color, mtype) \
131 (*(page_cachelists[mtype] + (color)))
132
133 /*
134 * There are mutexes for both the page freelist
135 * and the page cachelist. We want enough locks to make contention
136 * reasonable, but not too many -- otherwise page_freelist_lock() gets
137 * so expensive that it becomes the bottleneck!
138 */
139
140 #define NPC_MUTEX 16
141
142 extern kmutex_t *fpc_mutex[NPC_MUTEX];
143 extern kmutex_t *cpc_mutex[NPC_MUTEX];
144
145 extern page_t *page_get_mnode_freelist(int, uint_t, int, uchar_t, uint_t);
146 extern page_t *page_get_mnode_cachelist(uint_t, uint_t, int, int);
147
148 /* mem node iterator is not used on x86 */
149 #define MEM_NODE_ITERATOR_DECL(it)
150 #define MEM_NODE_ITERATOR_INIT(pfn, mnode, szc, it)
151
152 /*
153 * interleaved_mnodes mode is never set on x86, therefore,
154 * simply return the limits of the given mnode, which then
155 * determines the length of hpm_counters array for the mnode.
156 */
157 #define HPM_COUNTERS_LIMITS(mnode, physbase, physmax, first) \
158 { \
159 (physbase) = mem_node_config[(mnode)].physbase; \
160 (physmax) = mem_node_config[(mnode)].physmax; \
161 (first) = (mnode); \
162 }
163
164 #define PAGE_CTRS_WRITE_LOCK(mnode) \
165 { \
166 rw_enter(&page_ctrs_rwlock[(mnode)], RW_WRITER);\
167 page_freelist_lock(mnode); \
168 }
169
170 #define PAGE_CTRS_WRITE_UNLOCK(mnode) \
171 { \
172 page_freelist_unlock(mnode); \
173 rw_exit(&page_ctrs_rwlock[(mnode)]); \
174 }
175
176 /*
177 * macro to call page_ctrs_adjust() when memory is added
178 * during a DR operation.
179 */
180 #define PAGE_CTRS_ADJUST(pfn, cnt, rv) { \
181 spgcnt_t _cnt = (spgcnt_t)(cnt); \
182 int _mn; \
183 pgcnt_t _np; \
184 pfn_t _pfn = (pfn); \
185 pfn_t _endpfn = _pfn + _cnt; \
186 while (_pfn < _endpfn) { \
187 _mn = PFN_2_MEM_NODE(_pfn); \
188 _np = MIN(_endpfn, mem_node_config[_mn].physmax + 1) - _pfn; \
189 _pfn += _np; \
190 if ((rv = page_ctrs_adjust(_mn)) != 0) \
191 break; \
192 } \
193 }
194
195 #define PAGE_GET_COLOR_SHIFT(szc, nszc) \
196 (hw_page_array[(nszc)].hp_shift - hw_page_array[(szc)].hp_shift)
197
198 #define PAGE_CONVERT_COLOR(ncolor, szc, nszc) \
199 ((ncolor) << PAGE_GET_COLOR_SHIFT((szc), (nszc)))
200
201 #define PFN_2_COLOR(pfn, szc, it) \
202 (((pfn) & page_colors_mask) >> \
203 (hw_page_array[szc].hp_shift - hw_page_array[0].hp_shift))
204
205 #define PNUM_SIZE(szc) \
206 (hw_page_array[(szc)].hp_pgcnt)
207 #define PNUM_SHIFT(szc) \
208 (hw_page_array[(szc)].hp_shift - hw_page_array[0].hp_shift)
209 #define PAGE_GET_SHIFT(szc) \
210 (hw_page_array[(szc)].hp_shift)
211 #define PAGE_GET_PAGECOLORS(szc) \
212 (hw_page_array[(szc)].hp_colors)
213
214 /*
215 * This macro calculates the next sequential pfn with the specified
216 * color using color equivalency mask
217 */
218 #define PAGE_NEXT_PFN_FOR_COLOR(pfn, szc, color, ceq_mask, color_mask, it) \
219 { \
220 uint_t pfn_shift = PAGE_BSZS_SHIFT(szc); \
221 pfn_t spfn = pfn >> pfn_shift; \
222 pfn_t stride = (ceq_mask) + 1; \
223 ASSERT(((color) & ~(ceq_mask)) == 0); \
224 ASSERT((((ceq_mask) + 1) & (ceq_mask)) == 0); \
225 if (((spfn ^ (color)) & (ceq_mask)) == 0) { \
226 pfn += stride << pfn_shift; \
227 } else { \
228 pfn = (spfn & ~(pfn_t)(ceq_mask)) | (color); \
229 pfn = (pfn > spfn ? pfn : pfn + stride) << pfn_shift; \
230 } \
231 }
232
233 /* get the color equivalency mask for the next szc */
234 #define PAGE_GET_NSZ_MASK(szc, mask) \
235 ((mask) >> (PAGE_GET_SHIFT((szc) + 1) - PAGE_GET_SHIFT(szc)))
236
237 /* get the color of the next szc */
238 #define PAGE_GET_NSZ_COLOR(szc, color) \
239 ((color) >> (PAGE_GET_SHIFT((szc) + 1) - PAGE_GET_SHIFT(szc)))
240
241 /* Find the bin for the given page if it was of size szc */
242 #define PP_2_BIN_SZC(pp, szc) (PFN_2_COLOR(pp->p_pagenum, szc, NULL))
243
244 #define PP_2_BIN(pp) (PP_2_BIN_SZC(pp, pp->p_szc))
245
246 #define PP_2_MEM_NODE(pp) (PFN_2_MEM_NODE(pp->p_pagenum))
247 #define PP_2_MTYPE(pp) (pfn_2_mtype(pp->p_pagenum))
248 #define PP_2_SZC(pp) (pp->p_szc)
249
250 #define SZCPAGES(szc) (1 << PAGE_BSZS_SHIFT(szc))
251 #define PFN_BASE(pfnum, szc) (pfnum & ~(SZCPAGES(szc) - 1))
252
253 /*
254 * this structure is used for walking free page lists
255 * controls when to split large pages into smaller pages,
256 * and when to coalesce smaller pages into larger pages
257 */
258 typedef struct page_list_walker {
259 uint_t plw_colors; /* num of colors for szc */
260 uint_t plw_color_mask; /* colors-1 */
261 uint_t plw_bin_step; /* next bin: 1 or 2 */
262 uint_t plw_count; /* loop count */
263 uint_t plw_bin0; /* starting bin */
264 uint_t plw_bin_marker; /* bin after initial jump */
265 uint_t plw_bin_split_prev; /* last bin we tried to split */
266 uint_t plw_do_split; /* set if OK to split */
267 uint_t plw_split_next; /* next bin to split */
268 uint_t plw_ceq_dif; /* number of different color groups */
269 /* to check */
270 uint_t plw_ceq_mask[MMU_PAGE_SIZES + 1]; /* color equiv mask */
271 uint_t plw_bins[MMU_PAGE_SIZES + 1]; /* num of bins */
272 } page_list_walker_t;
273
274 void page_list_walk_init(uchar_t szc, uint_t flags, uint_t bin,
275 int can_split, int use_ceq, page_list_walker_t *plw);
276
277 uint_t page_list_walk_next_bin(uchar_t szc, uint_t bin,
278 page_list_walker_t *plw);
279
280 extern struct cpu cpus[];
281 #define CPU0 cpus
282
283 extern int mtype_init(vnode_t *, caddr_t, uint_t *, size_t);
284 #define MTYPE_INIT(mtype, vp, vaddr, flags, pgsz) \
285 (mtype = mtype_init(vp, vaddr, &(flags), pgsz))
286
287 /*
288 * macros to loop through the mtype range (page_get_mnode_{free,cache,any}list,
289 * and page_get_contig_pages)
290 *
291 * MTYPE_START sets the initial mtype. -1 if the mtype range specified does
292 * not contain mnode.
293 *
294 * MTYPE_NEXT sets the next mtype. -1 if there are no more valid
295 * mtype in the range.
296 */
297
298 #define MTYPE_START(mnode, mtype, flags) \
299 (mtype = mtype_func(mnode, mtype, flags))
300
301 #define MTYPE_NEXT(mnode, mtype, flags) { \
302 if (flags & PGI_MT_RANGE) { \
303 mtype = mtype_func(mnode, mtype, flags | PGI_MT_NEXT); \
304 } else { \
305 mtype = -1; \
306 } \
307 }
308
309 extern int mtype_pgr_init(int *, page_t *, pgcnt_t);
310 #define MTYPE_PGR_INIT(mtype, flags, pp, pgcnt) \
311 (mtype = mtype_pgr_init(&flags, pp, pgcnt))
312
313 #define MNODE_PGCNT(mnode) mnode_pgcnt(mnode)
314
315 extern void mnodetype_2_pfn(int, int, pfn_t *, pfn_t *);
316 #define MNODETYPE_2_PFN(mnode, mtype, pfnlo, pfnhi) \
317 mnodetype_2_pfn(mnode, mtype, &pfnlo, &pfnhi)
318
319 #define PC_BIN_MUTEX(mnode, bin, flags) ((flags & PG_FREE_LIST) ? \
320 &fpc_mutex[(bin) & (NPC_MUTEX - 1)][mnode] : \
321 &cpc_mutex[(bin) & (NPC_MUTEX - 1)][mnode])
322
323 #define FPC_MUTEX(mnode, i) (&fpc_mutex[i][mnode])
324 #define CPC_MUTEX(mnode, i) (&cpc_mutex[i][mnode])
325
326 #ifdef DEBUG
327 #define CHK_LPG(pp, szc) chk_lpg(pp, szc)
328 extern void chk_lpg(page_t *, uchar_t);
329 #else
330 #define CHK_LPG(pp, szc)
331 #endif
332
333 #define FULL_REGION_CNT(rg_szc) \
334 (LEVEL_SIZE(rg_szc) >> LEVEL_SHIFT(rg_szc - 1))
335
336 /* Return the leader for this mapping size */
337 #define PP_GROUPLEADER(pp, szc) \
338 (&(pp)[-(int)((pp)->p_pagenum & (SZCPAGES(szc)-1))])
339
340 /* Return the root page for this page based on p_szc */
341 #define PP_PAGEROOT(pp) ((pp)->p_szc == 0 ? (pp) : \
342 PP_GROUPLEADER((pp), (pp)->p_szc))
343
344 /*
345 * The counter base must be per page_counter element to prevent
346 * races when re-indexing, and the base page size element should
347 * be aligned on a boundary of the given region size.
348 *
349 * We also round up the number of pages spanned by the counters
350 * for a given region to PC_BASE_ALIGN in certain situations to simplify
351 * the coding for some non-performance critical routines.
352 */
353
354 #define PC_BASE_ALIGN ((pfn_t)1 << PAGE_BSZS_SHIFT(MMU_PAGE_SIZES-1))
355 #define PC_BASE_ALIGN_MASK (PC_BASE_ALIGN - 1)
356
357 /*
358 * cpu/mmu-dependent vm variables
359 */
360 extern uint_t mmu_page_sizes;
361 extern uint_t mmu_exported_page_sizes;
362 /*
363 * page sizes that legacy applications can see via getpagesizes(3c).
364 * Used to prevent legacy applications from inadvertantly using the
365 * 'new' large pagesizes (1g and above).
366 */
367 extern uint_t mmu_legacy_page_sizes;
368
369 /* For x86, userszc is the same as the kernel's szc */
370 #define USERSZC_2_SZC(userszc) (userszc)
371 #define SZC_2_USERSZC(szc) (szc)
372
373 /*
374 * for hw_page_map_t, sized to hold the ratio of large page to base
375 * pagesize (1024 max)
376 */
377 typedef short hpmctr_t;
378
379 /*
380 * get the setsize of the current cpu - assume homogenous for x86
381 */
382 extern int l2cache_sz, l2cache_linesz, l2cache_assoc;
383
384 #define L2CACHE_ALIGN l2cache_linesz
385 #define L2CACHE_ALIGN_MAX 64
386 #define CPUSETSIZE() \
387 (l2cache_assoc ? (l2cache_sz / l2cache_assoc) : MMU_PAGESIZE)
388
389 /*
390 * Return the log2(pagesize(szc) / MMU_PAGESIZE) --- or the shift count
391 * for the number of base pages in this pagesize
392 */
393 #define PAGE_BSZS_SHIFT(szc) (LEVEL_SHIFT(szc) - MMU_PAGESHIFT)
394
395 /*
396 * Internal PG_ flags.
397 */
398 #define PGI_RELOCONLY 0x010000 /* opposite of PG_NORELOC */
399 #define PGI_NOCAGE 0x020000 /* cage is disabled */
400 #define PGI_PGCPHIPRI 0x040000 /* page_get_contig_page pri alloc */
401 #define PGI_PGCPSZC0 0x080000 /* relocate base pagesize page */
402
403 /*
404 * PGI range flags - should not overlap PGI flags
405 */
406 #define PGI_MT_RANGE0 0x1000000 /* mtype range to 0 */
407 #define PGI_MT_RANGE16M 0x2000000 /* mtype range to 16m */
408 #define PGI_MT_RANGE4G 0x4000000 /* mtype range to 4g */
409 #define PGI_MT_NEXT 0x8000000 /* get next mtype */
410 #define PGI_MT_RANGE (PGI_MT_RANGE0 | PGI_MT_RANGE16M | PGI_MT_RANGE4G)
411
412
413 /*
414 * Maximum and default values for user heap, stack, private and shared
415 * anonymous memory, and user text and initialized data.
416 * Used by map_pgsz*() routines.
417 */
418 extern size_t max_uheap_lpsize;
419 extern size_t default_uheap_lpsize;
420 extern size_t max_ustack_lpsize;
421 extern size_t default_ustack_lpsize;
422 extern size_t max_privmap_lpsize;
423 extern size_t max_uidata_lpsize;
424 extern size_t max_utext_lpsize;
425 extern size_t max_shm_lpsize;
426 extern size_t mcntl0_lpsize;
427
428 /*
429 * Sanity control. Don't use large pages regardless of user
430 * settings if there's less than priv or shm_lpg_min_physmem memory installed.
431 * The units for this variable are 8K pages.
432 */
433 extern pgcnt_t privm_lpg_min_physmem;
434 extern pgcnt_t shm_lpg_min_physmem;
435
436 /*
437 * hash as and addr to get a bin.
438 */
439
440 #define AS_2_BIN(as, seg, vp, addr, bin, szc) \
441 bin = (((((uintptr_t)(addr) >> PAGESHIFT) + ((uintptr_t)(as) >> 4)) \
442 & page_colors_mask) >> \
443 (hw_page_array[szc].hp_shift - hw_page_array[0].hp_shift))
444
445 /*
446 * cpu private vm data - accessed thru CPU->cpu_vm_data
447 * vc_pnum_memseg: tracks last memseg visited in page_numtopp_nolock()
448 * vc_pnext_memseg: tracks last memseg visited in page_nextn()
449 * vc_kmptr: orignal unaligned kmem pointer for this vm_cpu_data_t
450 * vc_kmsize: orignal kmem size for this vm_cpu_data_t
451 */
452
453 typedef struct {
454 struct memseg *vc_pnum_memseg;
455 struct memseg *vc_pnext_memseg;
456 void *vc_kmptr;
457 size_t vc_kmsize;
458 } vm_cpu_data_t;
459
460 /* allocation size to ensure vm_cpu_data_t resides in its own cache line */
461 #define VM_CPU_DATA_PADSIZE \
462 (P2ROUNDUP(sizeof (vm_cpu_data_t), L2CACHE_ALIGN_MAX))
463
464 /*
465 * When a bin is empty, and we can't satisfy a color request correctly,
466 * we scan. If we assume that the programs have reasonable spatial
467 * behavior, then it will not be a good idea to use the adjacent color.
468 * Using the adjacent color would result in virtually adjacent addresses
469 * mapping into the same spot in the cache. So, if we stumble across
470 * an empty bin, skip a bunch before looking. After the first skip,
471 * then just look one bin at a time so we don't miss our cache on
472 * every look. Be sure to check every bin. Page_create() will panic
473 * if we miss a page.
474 *
475 * This also explains the `<=' in the for loops in both page_get_freelist()
476 * and page_get_cachelist(). Since we checked the target bin, skipped
477 * a bunch, then continued one a time, we wind up checking the target bin
478 * twice to make sure we get all of them bins.
479 */
480 #define BIN_STEP 19
481
482 #ifdef VM_STATS
483 struct vmm_vmstats_str {
484 ulong_t pgf_alloc[MMU_PAGE_SIZES]; /* page_get_freelist */
485 ulong_t pgf_allocok[MMU_PAGE_SIZES];
486 ulong_t pgf_allocokrem[MMU_PAGE_SIZES];
487 ulong_t pgf_allocfailed[MMU_PAGE_SIZES];
488 ulong_t pgf_allocdeferred;
489 ulong_t pgf_allocretry[MMU_PAGE_SIZES];
490 ulong_t pgc_alloc; /* page_get_cachelist */
491 ulong_t pgc_allocok;
492 ulong_t pgc_allocokrem;
493 ulong_t pgc_allocokdeferred;
494 ulong_t pgc_allocfailed;
495 ulong_t pgcp_alloc[MMU_PAGE_SIZES]; /* page_get_contig_pages */
496 ulong_t pgcp_allocfailed[MMU_PAGE_SIZES];
497 ulong_t pgcp_allocempty[MMU_PAGE_SIZES];
498 ulong_t pgcp_allocok[MMU_PAGE_SIZES];
499 ulong_t ptcp[MMU_PAGE_SIZES]; /* page_trylock_contig_pages */
500 ulong_t ptcpfreethresh[MMU_PAGE_SIZES];
501 ulong_t ptcpfailexcl[MMU_PAGE_SIZES];
502 ulong_t ptcpfailszc[MMU_PAGE_SIZES];
503 ulong_t ptcpfailcage[MMU_PAGE_SIZES];
504 ulong_t ptcpok[MMU_PAGE_SIZES];
505 ulong_t pgmf_alloc[MMU_PAGE_SIZES]; /* page_get_mnode_freelist */
506 ulong_t pgmf_allocfailed[MMU_PAGE_SIZES];
507 ulong_t pgmf_allocempty[MMU_PAGE_SIZES];
508 ulong_t pgmf_allocok[MMU_PAGE_SIZES];
509 ulong_t pgmc_alloc; /* page_get_mnode_cachelist */
510 ulong_t pgmc_allocfailed;
511 ulong_t pgmc_allocempty;
512 ulong_t pgmc_allocok;
513 ulong_t pladd_free[MMU_PAGE_SIZES]; /* page_list_add/sub */
514 ulong_t plsub_free[MMU_PAGE_SIZES];
515 ulong_t pladd_cache;
516 ulong_t plsub_cache;
517 ulong_t plsubpages_szcbig;
518 ulong_t plsubpages_szc0;
519 ulong_t pfs_req[MMU_PAGE_SIZES]; /* page_freelist_split */
520 ulong_t pfs_demote[MMU_PAGE_SIZES];
521 ulong_t pfc_coalok[MMU_PAGE_SIZES][MAX_MNODE_MRANGES];
522 ulong_t ppr_reloc[MMU_PAGE_SIZES]; /* page_relocate */
523 ulong_t ppr_relocnoroot[MMU_PAGE_SIZES];
524 ulong_t ppr_reloc_replnoroot[MMU_PAGE_SIZES];
525 ulong_t ppr_relocnolock[MMU_PAGE_SIZES];
526 ulong_t ppr_relocnomem[MMU_PAGE_SIZES];
527 ulong_t ppr_relocok[MMU_PAGE_SIZES];
528 ulong_t ppr_copyfail;
529 /* page coalesce counter */
530 ulong_t page_ctrs_coalesce[MMU_PAGE_SIZES][MAX_MNODE_MRANGES];
531 /* candidates useful */
532 ulong_t page_ctrs_cands_skip[MMU_PAGE_SIZES][MAX_MNODE_MRANGES];
533 /* ctrs changed after locking */
534 ulong_t page_ctrs_changed[MMU_PAGE_SIZES][MAX_MNODE_MRANGES];
535 /* page_freelist_coalesce failed */
536 ulong_t page_ctrs_failed[MMU_PAGE_SIZES][MAX_MNODE_MRANGES];
537 ulong_t page_ctrs_coalesce_all; /* page coalesce all counter */
538 ulong_t page_ctrs_cands_skip_all; /* candidates useful for all func */
539 ulong_t restrict4gcnt;
540 ulong_t unrestrict16mcnt; /* non-DMA 16m allocs allowed */
541 ulong_t pgpanicalloc; /* PG_PANIC allocation */
542 ulong_t pcf_deny[MMU_PAGE_SIZES]; /* page_chk_freelist */
543 ulong_t pcf_allow[MMU_PAGE_SIZES];
544 };
545 extern struct vmm_vmstats_str vmm_vmstats;
546 #endif /* VM_STATS */
547
548 extern size_t page_ctrs_sz(void);
549 extern caddr_t page_ctrs_alloc(caddr_t);
550 extern void page_ctr_sub(int, int, page_t *, int);
551 extern page_t *page_freelist_split(uchar_t,
552 uint_t, int, int, pfn_t, pfn_t, page_list_walker_t *);
553 extern page_t *page_freelist_coalesce(int, uchar_t, uint_t, uint_t, int,
554 pfn_t);
555 extern void page_freelist_coalesce_all(int);
556 extern uint_t page_get_pagecolors(uint_t);
557 extern void pfnzero(pfn_t, uint_t, uint_t);
558
559 #ifdef __cplusplus
560 }
561 #endif
562
563 #endif /* _VM_DEP_H */