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