xref: /illumos-gate/usr/src/uts/i86pc/vm/vm_dep.h (revision bf5d9f18edeb77c14df996d367853599bdd43fd1)
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  */
24 /*
25  * Copyright (c) 2010, Intel Corporation.
26  * All rights reserved.
27  */
28 
29 /*
30  * UNIX machine dependent virtual memory support.
31  */
32 
33 #ifndef	_VM_DEP_H
34 #define	_VM_DEP_H
35 
36 
37 #ifdef	__cplusplus
38 extern "C" {
39 #endif
40 
41 #include <sys/clock.h>
42 #include <vm/hat_pte.h>
43 #include <sys/param.h>
44 #include <sys/memnode.h>
45 
46 /*
47  * WARNING: vm_dep.h is included by files in common.
48  */
49 
50 #define	GETTICK()	tsc_read()
51 /*
52  * Do not use this function for obtaining clock tick.  This
53  * is called by callers who do not need to have a guarenteed
54  * correct tick value.  The proper routine to use is tsc_read().
55  */
56 
57 extern u_longlong_t	randtick();
58 extern uint_t page_create_update_flags_x86(uint_t);
59 
60 extern size_t plcnt_sz(size_t);
61 #define	PLCNT_SZ(ctrs_sz) (ctrs_sz = plcnt_sz(ctrs_sz))
62 
63 extern caddr_t plcnt_init(caddr_t);
64 #define	PLCNT_INIT(addr) (addr = plcnt_init(addr))
65 
66 extern void plcnt_inc_dec(page_t *, int, int, long, int);
67 #define	PLCNT_INCR(pp, mnode, mtype, szc, flags)			\
68 	plcnt_inc_dec(pp, mtype, szc, 1l << PAGE_BSZS_SHIFT(szc), flags)
69 #define	PLCNT_DECR(pp, mnode, mtype, szc, flags)			\
70 	plcnt_inc_dec(pp, mtype, szc, \
71 	(long)(ULONG_MAX << PAGE_BSZS_SHIFT(szc)), flags)
72 
73 /*
74  * macro to update page list max counts.  no-op on x86.
75  */
76 #define	PLCNT_XFER_NORELOC(pp)
77 
78 /*
79  * macro to modify the page list max counts when memory is added to
80  * the page lists during startup (add_physmem) or during a DR operation
81  * when memory is added (kphysm_add_memory_dynamic) or deleted
82  * (kphysm_del_cleanup).
83  */
84 #define	PLCNT_MODIFY_MAX(pfn, cnt)	mtype_modify_max(pfn, cnt)
85 
86 extern int memrange_num(pfn_t);
87 extern int pfn_2_mtype(pfn_t);
88 extern int mtype_func(int, int, uint_t);
89 extern void mtype_modify_max(pfn_t, long);
90 extern int mnode_pgcnt(int);
91 extern int mnode_range_cnt(int);
92 
93 /*
94  * candidate counters in vm_pagelist.c are indexed by color and range
95  */
96 #define	NUM_MEM_RANGES		4		/* memory range types */
97 #define	MAX_MNODE_MRANGES	NUM_MEM_RANGES
98 #define	MNODE_RANGE_CNT(mnode)	mnode_range_cnt(mnode)
99 #define	MNODE_MAX_MRANGE(mnode)	memrange_num(mem_node_config[mnode].physbase)
100 
101 /*
102  * This was really badly defined, it implicitly uses mnode_maxmrange[]
103  * which is a static in vm_pagelist.c
104  */
105 extern int mtype_2_mrange(int);
106 #define	MTYPE_2_MRANGE(mnode, mtype)	\
107 	(mnode_maxmrange[mnode] - mtype_2_mrange(mtype))
108 
109 /*
110  * Per page size free lists. Allocated dynamically.
111  * dimensions [mtype][mmu_page_sizes][colors]
112  *
113  * mtype specifies a physical memory range with a unique mnode.
114  */
115 
116 extern page_t ****page_freelists;
117 
118 #define	PAGE_FREELISTS(mnode, szc, color, mtype)		\
119 	(*(page_freelists[mtype][szc] + (color)))
120 
121 /*
122  * For now there is only a single size cache list. Allocated dynamically.
123  * dimensions [mtype][colors]
124  *
125  * mtype specifies a physical memory range with a unique mnode.
126  */
127 extern page_t ***page_cachelists;
128 
129 #define	PAGE_CACHELISTS(mnode, color, mtype) 		\
130 	(*(page_cachelists[mtype] + (color)))
131 
132 /*
133  * There are mutexes for both the page freelist
134  * and the page cachelist.  We want enough locks to make contention
135  * reasonable, but not too many -- otherwise page_freelist_lock() gets
136  * so expensive that it becomes the bottleneck!
137  */
138 
139 #define	NPC_MUTEX	16
140 
141 extern kmutex_t	*fpc_mutex[NPC_MUTEX];
142 extern kmutex_t	*cpc_mutex[NPC_MUTEX];
143 
144 extern page_t *page_get_mnode_freelist(int, uint_t, int, uchar_t, uint_t);
145 extern page_t *page_get_mnode_cachelist(uint_t, uint_t, int, int);
146 
147 /* mem node iterator is not used on x86 */
148 #define	MEM_NODE_ITERATOR_DECL(it)
149 #define	MEM_NODE_ITERATOR_INIT(pfn, mnode, szc, it)
150 
151 /*
152  * interleaved_mnodes mode is never set on x86, therefore,
153  * simply return the limits of the given mnode, which then
154  * determines the length of hpm_counters array for the mnode.
155  */
156 #define	HPM_COUNTERS_LIMITS(mnode, physbase, physmax, first) 	\
157 	{							\
158 		(physbase) = mem_node_config[(mnode)].physbase;	\
159 		(physmax) = mem_node_config[(mnode)].physmax;	\
160 		(first) = (mnode);				\
161 	}
162 
163 #define	PAGE_CTRS_WRITE_LOCK(mnode)				\
164 	{							\
165 		rw_enter(&page_ctrs_rwlock[(mnode)], RW_WRITER);\
166 		page_freelist_lock(mnode);			\
167 	}
168 
169 #define	PAGE_CTRS_WRITE_UNLOCK(mnode)				\
170 	{							\
171 		page_freelist_unlock(mnode);			\
172 		rw_exit(&page_ctrs_rwlock[(mnode)]);		\
173 	}
174 
175 /*
176  * macro to call page_ctrs_adjust() when memory is added
177  * during a DR operation.
178  */
179 #define	PAGE_CTRS_ADJUST(pfn, cnt, rv) {				       \
180 	spgcnt_t _cnt = (spgcnt_t)(cnt);				       \
181 	int _mn;							       \
182 	pgcnt_t _np;							       \
183 	pfn_t _pfn = (pfn);						       \
184 	pfn_t _endpfn = _pfn + _cnt;					       \
185 	while (_pfn < _endpfn) {					       \
186 		_mn = PFN_2_MEM_NODE(_pfn);				       \
187 		_np = MIN(_endpfn, mem_node_config[_mn].physmax + 1) - _pfn;   \
188 		_pfn += _np;						       \
189 		if ((rv = page_ctrs_adjust(_mn)) != 0)			       \
190 			break;						       \
191 	}								       \
192 }
193 
194 #define	PAGE_GET_COLOR_SHIFT(szc, nszc)				\
195 	    (hw_page_array[(nszc)].hp_shift - hw_page_array[(szc)].hp_shift)
196 
197 #define	PAGE_CONVERT_COLOR(ncolor, szc, nszc)			\
198 	    ((ncolor) << PAGE_GET_COLOR_SHIFT((szc), (nszc)))
199 
200 #define	PFN_2_COLOR(pfn, szc, it)					\
201 	(((pfn) & page_colors_mask) >>			                \
202 	(hw_page_array[szc].hp_shift - hw_page_array[0].hp_shift))
203 
204 #define	PNUM_SIZE(szc)							\
205 	(hw_page_array[(szc)].hp_pgcnt)
206 #define	PNUM_SHIFT(szc)							\
207 	(hw_page_array[(szc)].hp_shift - hw_page_array[0].hp_shift)
208 #define	PAGE_GET_SHIFT(szc)						\
209 	(hw_page_array[(szc)].hp_shift)
210 #define	PAGE_GET_PAGECOLORS(szc)					\
211 	(hw_page_array[(szc)].hp_colors)
212 
213 /*
214  * This macro calculates the next sequential pfn with the specified
215  * color using color equivalency mask
216  */
217 #define	PAGE_NEXT_PFN_FOR_COLOR(pfn, szc, color, ceq_mask, color_mask, it)    \
218 	{								      \
219 		uint_t	pfn_shift = PAGE_BSZS_SHIFT(szc);                     \
220 		pfn_t	spfn = pfn >> pfn_shift;                              \
221 		pfn_t	stride = (ceq_mask) + 1;                              \
222 		ASSERT(((color) & ~(ceq_mask)) == 0);                         \
223 		ASSERT((((ceq_mask) + 1) & (ceq_mask)) == 0);                 \
224 		if (((spfn ^ (color)) & (ceq_mask)) == 0) {                   \
225 			pfn += stride << pfn_shift;                           \
226 		} else {                                                      \
227 			pfn = (spfn & ~(pfn_t)(ceq_mask)) | (color);          \
228 			pfn = (pfn > spfn ? pfn : pfn + stride) << pfn_shift; \
229 		}                                                             \
230 	}
231 
232 /* get the color equivalency mask for the next szc */
233 #define	PAGE_GET_NSZ_MASK(szc, mask)                                         \
234 	((mask) >> (PAGE_GET_SHIFT((szc) + 1) - PAGE_GET_SHIFT(szc)))
235 
236 /* get the color of the next szc */
237 #define	PAGE_GET_NSZ_COLOR(szc, color)                                       \
238 	((color) >> (PAGE_GET_SHIFT((szc) + 1) - PAGE_GET_SHIFT(szc)))
239 
240 /* Find the bin for the given page if it was of size szc */
241 #define	PP_2_BIN_SZC(pp, szc)	(PFN_2_COLOR(pp->p_pagenum, szc, NULL))
242 
243 #define	PP_2_BIN(pp)		(PP_2_BIN_SZC(pp, pp->p_szc))
244 
245 #define	PP_2_MEM_NODE(pp)	(PFN_2_MEM_NODE(pp->p_pagenum))
246 #define	PP_2_MTYPE(pp)		(pfn_2_mtype(pp->p_pagenum))
247 #define	PP_2_SZC(pp)		(pp->p_szc)
248 
249 #define	SZCPAGES(szc)		(1 << PAGE_BSZS_SHIFT(szc))
250 #define	PFN_BASE(pfnum, szc)	(pfnum & ~(SZCPAGES(szc) - 1))
251 
252 /*
253  * this structure is used for walking free page lists
254  * controls when to split large pages into smaller pages,
255  * and when to coalesce smaller pages into larger pages
256  */
257 typedef struct page_list_walker {
258 	uint_t	plw_colors;		/* num of colors for szc */
259 	uint_t  plw_color_mask;		/* colors-1 */
260 	uint_t	plw_bin_step;		/* next bin: 1 or 2 */
261 	uint_t  plw_count;		/* loop count */
262 	uint_t	plw_bin0;		/* starting bin */
263 	uint_t  plw_bin_marker;		/* bin after initial jump */
264 	uint_t  plw_bin_split_prev;	/* last bin we tried to split */
265 	uint_t  plw_do_split;		/* set if OK to split */
266 	uint_t  plw_split_next;		/* next bin to split */
267 	uint_t	plw_ceq_dif;		/* number of different color groups */
268 					/* to check */
269 	uint_t	plw_ceq_mask[MMU_PAGE_SIZES + 1]; /* color equiv mask */
270 	uint_t	plw_bins[MMU_PAGE_SIZES + 1];	/* num of bins */
271 } page_list_walker_t;
272 
273 void	page_list_walk_init(uchar_t szc, uint_t flags, uint_t bin,
274     int can_split, int use_ceq, page_list_walker_t *plw);
275 
276 uint_t	page_list_walk_next_bin(uchar_t szc, uint_t bin,
277     page_list_walker_t *plw);
278 
279 extern struct cpu	cpus[];
280 #define	CPU0		cpus
281 
282 extern int mtype_init(vnode_t *, caddr_t, uint_t *, size_t);
283 #define	MTYPE_INIT(mtype, vp, vaddr, flags, pgsz)		\
284 	(mtype = mtype_init(vp, vaddr, &(flags), pgsz))
285 
286 /*
287  * macros to loop through the mtype range (page_get_mnode_{free,cache,any}list,
288  * and page_get_contig_pages)
289  *
290  * MTYPE_START sets the initial mtype. -1 if the mtype range specified does
291  * not contain mnode.
292  *
293  * MTYPE_NEXT sets the next mtype. -1 if there are no more valid
294  * mtype in the range.
295  */
296 
297 #define	MTYPE_START(mnode, mtype, flags)				\
298 	(mtype = mtype_func(mnode, mtype, flags))
299 
300 #define	MTYPE_NEXT(mnode, mtype, flags) {				\
301 	if (flags & PGI_MT_RANGE) {					\
302 		mtype = mtype_func(mnode, mtype, flags | PGI_MT_NEXT);	\
303 	} else {							\
304 		mtype = -1;						\
305 	}								\
306 }
307 
308 extern int mtype_pgr_init(int *, page_t *, int, pgcnt_t);
309 #define	MTYPE_PGR_INIT(mtype, flags, pp, mnode, pgcnt)			\
310 	(mtype = mtype_pgr_init(&flags, pp, mnode, pgcnt))
311 
312 #define	MNODE_PGCNT(mnode)		mnode_pgcnt(mnode)
313 
314 extern void mnodetype_2_pfn(int, int, pfn_t *, pfn_t *);
315 #define	MNODETYPE_2_PFN(mnode, mtype, pfnlo, pfnhi)			\
316 	mnodetype_2_pfn(mnode, mtype, &pfnlo, &pfnhi)
317 
318 #define	PC_BIN_MUTEX(mnode, bin, flags) ((flags & PG_FREE_LIST) ?	\
319 	&fpc_mutex[(bin) & (NPC_MUTEX - 1)][mnode] :			\
320 	&cpc_mutex[(bin) & (NPC_MUTEX - 1)][mnode])
321 
322 #define	FPC_MUTEX(mnode, i)	(&fpc_mutex[i][mnode])
323 #define	CPC_MUTEX(mnode, i)	(&cpc_mutex[i][mnode])
324 
325 #ifdef DEBUG
326 #define	CHK_LPG(pp, szc)	chk_lpg(pp, szc)
327 extern void	chk_lpg(page_t *, uchar_t);
328 #else
329 #define	CHK_LPG(pp, szc)
330 #endif
331 
332 #define	FULL_REGION_CNT(rg_szc)	\
333 	(LEVEL_SIZE(rg_szc) >> LEVEL_SHIFT(rg_szc - 1))
334 
335 /* Return the leader for this mapping size */
336 #define	PP_GROUPLEADER(pp, szc) \
337 	(&(pp)[-(int)((pp)->p_pagenum & (SZCPAGES(szc)-1))])
338 
339 /* Return the root page for this page based on p_szc */
340 #define	PP_PAGEROOT(pp) ((pp)->p_szc == 0 ? (pp) : \
341 	PP_GROUPLEADER((pp), (pp)->p_szc))
342 
343 /*
344  * The counter base must be per page_counter element to prevent
345  * races when re-indexing, and the base page size element should
346  * be aligned on a boundary of the given region size.
347  *
348  * We also round up the number of pages spanned by the counters
349  * for a given region to PC_BASE_ALIGN in certain situations to simplify
350  * the coding for some non-performance critical routines.
351  */
352 
353 #define	PC_BASE_ALIGN		((pfn_t)1 << PAGE_BSZS_SHIFT(MMU_PAGE_SIZES-1))
354 #define	PC_BASE_ALIGN_MASK	(PC_BASE_ALIGN - 1)
355 
356 /*
357  * cpu/mmu-dependent vm variables
358  */
359 extern uint_t mmu_page_sizes;
360 extern uint_t mmu_exported_page_sizes;
361 /*
362  * page sizes that legacy applications can see via getpagesizes(3c).
363  * Used to prevent legacy applications from inadvertantly using the
364  * 'new' large pagesizes (1g and above).
365  */
366 extern uint_t mmu_legacy_page_sizes;
367 
368 /* For x86, userszc is the same as the kernel's szc */
369 #define	USERSZC_2_SZC(userszc)	(userszc)
370 #define	SZC_2_USERSZC(szc)	(szc)
371 
372 /*
373  * for hw_page_map_t, sized to hold the ratio of large page to base
374  * pagesize (1024 max)
375  */
376 typedef	short	hpmctr_t;
377 
378 /*
379  * get the setsize of the current cpu - assume homogenous for x86
380  */
381 extern int	l2cache_sz, l2cache_linesz, l2cache_assoc;
382 
383 #define	L2CACHE_ALIGN		l2cache_linesz
384 #define	L2CACHE_ALIGN_MAX	64
385 #define	CPUSETSIZE()		\
386 	(l2cache_assoc ? (l2cache_sz / l2cache_assoc) : MMU_PAGESIZE)
387 
388 /*
389  * Return the log2(pagesize(szc) / MMU_PAGESIZE) --- or the shift count
390  * for the number of base pages in this pagesize
391  */
392 #define	PAGE_BSZS_SHIFT(szc) (LEVEL_SHIFT(szc) - MMU_PAGESHIFT)
393 
394 /*
395  * Internal PG_ flags.
396  */
397 #define	PGI_RELOCONLY	0x010000	/* opposite of PG_NORELOC */
398 #define	PGI_NOCAGE	0x020000	/* cage is disabled */
399 #define	PGI_PGCPHIPRI	0x040000	/* page_get_contig_page pri alloc */
400 #define	PGI_PGCPSZC0	0x080000	/* relocate base pagesize page */
401 
402 /*
403  * PGI range flags - should not overlap PGI flags
404  */
405 #define	PGI_MT_RANGE0	0x1000000	/* mtype range to 0 */
406 #define	PGI_MT_RANGE16M 0x2000000	/* mtype range to 16m */
407 #define	PGI_MT_RANGE4G	0x4000000	/* mtype range to 4g */
408 #define	PGI_MT_NEXT	0x8000000	/* get next mtype */
409 #define	PGI_MT_RANGE	(PGI_MT_RANGE0 | PGI_MT_RANGE16M | PGI_MT_RANGE4G)
410 
411 
412 /*
413  * Maximum and default values for user heap, stack, private and shared
414  * anonymous memory, and user text and initialized data.
415  * Used by map_pgsz*() routines.
416  */
417 extern size_t max_uheap_lpsize;
418 extern size_t default_uheap_lpsize;
419 extern size_t max_ustack_lpsize;
420 extern size_t default_ustack_lpsize;
421 extern size_t max_privmap_lpsize;
422 extern size_t max_uidata_lpsize;
423 extern size_t max_utext_lpsize;
424 extern size_t max_shm_lpsize;
425 extern size_t mcntl0_lpsize;
426 
427 /*
428  * Sanity control. Don't use large pages regardless of user
429  * settings if there's less than priv or shm_lpg_min_physmem memory installed.
430  * The units for this variable are 8K pages.
431  */
432 extern pgcnt_t privm_lpg_min_physmem;
433 extern pgcnt_t shm_lpg_min_physmem;
434 
435 /*
436  * hash as and addr to get a bin.
437  */
438 
439 #define	AS_2_BIN(as, seg, vp, addr, bin, szc)				    \
440 	bin = (((((uintptr_t)(addr) >> PAGESHIFT) + ((uintptr_t)(as) >> 4)) \
441 	    & page_colors_mask) >>					    \
442 	    (hw_page_array[szc].hp_shift - hw_page_array[0].hp_shift))
443 
444 /*
445  * cpu private vm data - accessed thru CPU->cpu_vm_data
446  *	vc_pnum_memseg: tracks last memseg visited in page_numtopp_nolock()
447  *	vc_pnext_memseg: tracks last memseg visited in page_nextn()
448  *	vc_kmptr: orignal unaligned kmem pointer for this vm_cpu_data_t
449  *	vc_kmsize: orignal kmem size for this vm_cpu_data_t
450  */
451 
452 typedef struct {
453 	struct memseg	*vc_pnum_memseg;
454 	struct memseg	*vc_pnext_memseg;
455 	void		*vc_kmptr;
456 	size_t		vc_kmsize;
457 } vm_cpu_data_t;
458 
459 /* allocation size to ensure vm_cpu_data_t resides in its own cache line */
460 #define	VM_CPU_DATA_PADSIZE						\
461 	(P2ROUNDUP(sizeof (vm_cpu_data_t), L2CACHE_ALIGN_MAX))
462 
463 /*
464  * When a bin is empty, and we can't satisfy a color request correctly,
465  * we scan.  If we assume that the programs have reasonable spatial
466  * behavior, then it will not be a good idea to use the adjacent color.
467  * Using the adjacent color would result in virtually adjacent addresses
468  * mapping into the same spot in the cache.  So, if we stumble across
469  * an empty bin, skip a bunch before looking.  After the first skip,
470  * then just look one bin at a time so we don't miss our cache on
471  * every look. Be sure to check every bin.  Page_create() will panic
472  * if we miss a page.
473  *
474  * This also explains the `<=' in the for loops in both page_get_freelist()
475  * and page_get_cachelist().  Since we checked the target bin, skipped
476  * a bunch, then continued one a time, we wind up checking the target bin
477  * twice to make sure we get all of them bins.
478  */
479 #define	BIN_STEP	19
480 
481 #ifdef VM_STATS
482 struct vmm_vmstats_str {
483 	ulong_t pgf_alloc[MMU_PAGE_SIZES];	/* page_get_freelist */
484 	ulong_t pgf_allocok[MMU_PAGE_SIZES];
485 	ulong_t pgf_allocokrem[MMU_PAGE_SIZES];
486 	ulong_t pgf_allocfailed[MMU_PAGE_SIZES];
487 	ulong_t	pgf_allocdeferred;
488 	ulong_t	pgf_allocretry[MMU_PAGE_SIZES];
489 	ulong_t pgc_alloc;			/* page_get_cachelist */
490 	ulong_t pgc_allocok;
491 	ulong_t pgc_allocokrem;
492 	ulong_t pgc_allocokdeferred;
493 	ulong_t pgc_allocfailed;
494 	ulong_t	pgcp_alloc[MMU_PAGE_SIZES];	/* page_get_contig_pages */
495 	ulong_t	pgcp_allocfailed[MMU_PAGE_SIZES];
496 	ulong_t	pgcp_allocempty[MMU_PAGE_SIZES];
497 	ulong_t	pgcp_allocok[MMU_PAGE_SIZES];
498 	ulong_t	ptcp[MMU_PAGE_SIZES];		/* page_trylock_contig_pages */
499 	ulong_t	ptcpfreethresh[MMU_PAGE_SIZES];
500 	ulong_t	ptcpfailexcl[MMU_PAGE_SIZES];
501 	ulong_t	ptcpfailszc[MMU_PAGE_SIZES];
502 	ulong_t	ptcpfailcage[MMU_PAGE_SIZES];
503 	ulong_t	ptcpok[MMU_PAGE_SIZES];
504 	ulong_t	pgmf_alloc[MMU_PAGE_SIZES];	/* page_get_mnode_freelist */
505 	ulong_t	pgmf_allocfailed[MMU_PAGE_SIZES];
506 	ulong_t	pgmf_allocempty[MMU_PAGE_SIZES];
507 	ulong_t	pgmf_allocok[MMU_PAGE_SIZES];
508 	ulong_t	pgmc_alloc;			/* page_get_mnode_cachelist */
509 	ulong_t	pgmc_allocfailed;
510 	ulong_t	pgmc_allocempty;
511 	ulong_t	pgmc_allocok;
512 	ulong_t	pladd_free[MMU_PAGE_SIZES];	/* page_list_add/sub */
513 	ulong_t	plsub_free[MMU_PAGE_SIZES];
514 	ulong_t	pladd_cache;
515 	ulong_t	plsub_cache;
516 	ulong_t	plsubpages_szcbig;
517 	ulong_t	plsubpages_szc0;
518 	ulong_t	pfs_req[MMU_PAGE_SIZES];	/* page_freelist_split */
519 	ulong_t	pfs_demote[MMU_PAGE_SIZES];
520 	ulong_t	pfc_coalok[MMU_PAGE_SIZES][MAX_MNODE_MRANGES];
521 	ulong_t	ppr_reloc[MMU_PAGE_SIZES];	/* page_relocate */
522 	ulong_t ppr_relocnoroot[MMU_PAGE_SIZES];
523 	ulong_t ppr_reloc_replnoroot[MMU_PAGE_SIZES];
524 	ulong_t ppr_relocnolock[MMU_PAGE_SIZES];
525 	ulong_t ppr_relocnomem[MMU_PAGE_SIZES];
526 	ulong_t ppr_relocok[MMU_PAGE_SIZES];
527 	ulong_t ppr_copyfail;
528 	/* page coalesce counter */
529 	ulong_t page_ctrs_coalesce[MMU_PAGE_SIZES][MAX_MNODE_MRANGES];
530 	/* candidates useful */
531 	ulong_t page_ctrs_cands_skip[MMU_PAGE_SIZES][MAX_MNODE_MRANGES];
532 	/* ctrs changed after locking */
533 	ulong_t page_ctrs_changed[MMU_PAGE_SIZES][MAX_MNODE_MRANGES];
534 	/* page_freelist_coalesce failed */
535 	ulong_t page_ctrs_failed[MMU_PAGE_SIZES][MAX_MNODE_MRANGES];
536 	ulong_t page_ctrs_coalesce_all;	/* page coalesce all counter */
537 	ulong_t page_ctrs_cands_skip_all; /* candidates useful for all func */
538 	ulong_t	restrict4gcnt;
539 	ulong_t	unrestrict16mcnt;	/* non-DMA 16m allocs allowed */
540 	ulong_t	pgpanicalloc;		/* PG_PANIC allocation */
541 	ulong_t	pcf_deny[MMU_PAGE_SIZES];	/* page_chk_freelist */
542 	ulong_t	pcf_allow[MMU_PAGE_SIZES];
543 };
544 extern struct vmm_vmstats_str vmm_vmstats;
545 #endif	/* VM_STATS */
546 
547 extern size_t page_ctrs_sz(void);
548 extern caddr_t page_ctrs_alloc(caddr_t);
549 extern void page_ctr_sub(int, int, page_t *, int);
550 extern page_t *page_freelist_split(uchar_t,
551     uint_t, int, int, pfn_t, pfn_t, page_list_walker_t *);
552 extern page_t *page_freelist_coalesce(int, uchar_t, uint_t, uint_t, int,
553     pfn_t);
554 extern void page_freelist_coalesce_all(int);
555 extern uint_t page_get_pagecolors(uint_t);
556 extern void pfnzero(pfn_t, uint_t, uint_t);
557 
558 #ifdef	__cplusplus
559 }
560 #endif
561 
562 #endif	/* _VM_DEP_H */
563