The Design and Implementation of the FreeBSD Operating System, Second Edition
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sys/uvm/uvm_extern.h

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    1 /*      $NetBSD: uvm_extern.h,v 1.122.2.1 2006/12/09 11:53:42 bouyer Exp $      */
    2 
    3 /*
    4  *
    5  * Copyright (c) 1997 Charles D. Cranor and Washington University.
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. All advertising materials mentioning features or use of this software
   17  *    must display the following acknowledgement:
   18  *      This product includes software developed by Charles D. Cranor and
   19  *      Washington University.
   20  * 4. The name of the author may not be used to endorse or promote products
   21  *    derived from this software without specific prior written permission.
   22  *
   23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   25  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   26  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   27  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   28  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   29  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   30  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   31  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   32  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   33  *
   34  * from: Id: uvm_extern.h,v 1.1.2.21 1998/02/07 01:16:53 chs Exp
   35  */
   36 
   37 /*-
   38  * Copyright (c) 1991, 1992, 1993
   39  *      The Regents of the University of California.  All rights reserved.
   40  *
   41  * Redistribution and use in source and binary forms, with or without
   42  * modification, are permitted provided that the following conditions
   43  * are met:
   44  * 1. Redistributions of source code must retain the above copyright
   45  *    notice, this list of conditions and the following disclaimer.
   46  * 2. Redistributions in binary form must reproduce the above copyright
   47  *    notice, this list of conditions and the following disclaimer in the
   48  *    documentation and/or other materials provided with the distribution.
   49  * 3. Neither the name of the University nor the names of its contributors
   50  *    may be used to endorse or promote products derived from this software
   51  *    without specific prior written permission.
   52  *
   53  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   54  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   55  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   56  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   57  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   58  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   59  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   60  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   61  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   62  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   63  * SUCH DAMAGE.
   64  *
   65  *      @(#)vm_extern.h 8.5 (Berkeley) 5/3/95
   66  */
   67 
   68 #ifndef _UVM_UVM_EXTERN_H_
   69 #define _UVM_UVM_EXTERN_H_
   70 
   71 /*
   72  * uvm_extern.h: this file defines the external interface to the VM system.
   73  *
   74  * this should be the only file included by non-VM parts of the kernel
   75  * which need access to VM services.   if you want to know the interface
   76  * to the MI VM layer without knowing the details, this is the file to
   77  * learn.
   78  *
   79  * NOTE: vm system calls are prototyped in syscallargs.h
   80  */
   81 
   82 /*
   83  * typedefs, necessary for standard UVM headers.
   84  */
   85 
   86 typedef unsigned int uvm_flag_t;
   87 
   88 typedef int vm_inherit_t;       /* XXX: inheritance codes */
   89 typedef off_t voff_t;           /* XXX: offset within a uvm_object */
   90 typedef voff_t pgoff_t;         /* XXX: number of pages within a uvm object */
   91 
   92 /*
   93  * defines
   94  */
   95 
   96 /*
   97  * the following defines are for uvm_map and functions which call it.
   98  */
   99 
  100 /* protections bits */
  101 #define UVM_PROT_MASK   0x07    /* protection mask */
  102 #define UVM_PROT_NONE   0x00    /* protection none */
  103 #define UVM_PROT_ALL    0x07    /* everything */
  104 #define UVM_PROT_READ   0x01    /* read */
  105 #define UVM_PROT_WRITE  0x02    /* write */
  106 #define UVM_PROT_EXEC   0x04    /* exec */
  107 
  108 /* protection short codes */
  109 #define UVM_PROT_R      0x01    /* read */
  110 #define UVM_PROT_W      0x02    /* write */
  111 #define UVM_PROT_RW     0x03    /* read-write */
  112 #define UVM_PROT_X      0x04    /* exec */
  113 #define UVM_PROT_RX     0x05    /* read-exec */
  114 #define UVM_PROT_WX     0x06    /* write-exec */
  115 #define UVM_PROT_RWX    0x07    /* read-write-exec */
  116 
  117 /* 0x08: not used */
  118 
  119 /* inherit codes */
  120 #define UVM_INH_MASK    0x30    /* inherit mask */
  121 #define UVM_INH_SHARE   0x00    /* "share" */
  122 #define UVM_INH_COPY    0x10    /* "copy" */
  123 #define UVM_INH_NONE    0x20    /* "none" */
  124 #define UVM_INH_DONATE  0x30    /* "donate" << not used */
  125 
  126 /* 0x40, 0x80: not used */
  127 
  128 /* bits 0x700: max protection, 0x800: not used */
  129 
  130 /* bits 0x7000: advice, 0x8000: not used */
  131 /* advice: matches MADV_* from sys/mman.h and POSIX_FADV_* from sys/fcntl.h */
  132 #define UVM_ADV_NORMAL  0x0     /* 'normal' */
  133 #define UVM_ADV_RANDOM  0x1     /* 'random' */
  134 #define UVM_ADV_SEQUENTIAL 0x2  /* 'sequential' */
  135 /* 0x3: will need, 0x4: dontneed */
  136 #define UVM_ADV_MASK    0x7     /* mask */
  137 
  138 /* bits 0xffff0000: mapping flags */
  139 #define UVM_FLAG_FIXED   0x010000 /* find space */
  140 #define UVM_FLAG_OVERLAY 0x020000 /* establish overlay */
  141 #define UVM_FLAG_NOMERGE 0x040000 /* don't merge map entries */
  142 #define UVM_FLAG_COPYONW 0x080000 /* set copy_on_write flag */
  143 #define UVM_FLAG_AMAPPAD 0x100000 /* for bss: pad amap to reduce malloc() */
  144 #define UVM_FLAG_TRYLOCK 0x200000 /* fail if we can not lock map */
  145 #define UVM_FLAG_NOWAIT  0x400000 /* not allowed to sleep */
  146 #define UVM_FLAG_QUANTUM 0x800000 /* entry never be splitted later */
  147 #define UVM_FLAG_WAITVA  0x1000000 /* wait for va */
  148 #define UVM_FLAG_VAONLY  0x2000000 /* unmap: no pages are mapped */
  149 
  150 /* macros to extract info */
  151 #define UVM_PROTECTION(X)       ((X) & UVM_PROT_MASK)
  152 #define UVM_INHERIT(X)          (((X) & UVM_INH_MASK) >> 4)
  153 #define UVM_MAXPROTECTION(X)    (((X) >> 8) & UVM_PROT_MASK)
  154 #define UVM_ADVICE(X)           (((X) >> 12) & UVM_ADV_MASK)
  155 
  156 #define UVM_MAPFLAG(PROT,MAXPROT,INH,ADVICE,FLAGS) \
  157         (((MAXPROT) << 8)|(PROT)|(INH)|((ADVICE) << 12)|(FLAGS))
  158 
  159 /* magic offset value: offset not known(obj) or don't care(!obj) */
  160 #define UVM_UNKNOWN_OFFSET ((voff_t) -1)
  161 
  162 /*
  163  * the following defines are for uvm_km_alloc/free's flags
  164  */
  165 #define UVM_KMF_WIRED   0x1                     /* allocation type: wired */
  166 #define UVM_KMF_PAGEABLE 0x2                    /* allocation type: pageable */
  167 #define UVM_KMF_VAONLY  0x4                     /* allocation type: VA only */
  168 #define UVM_KMF_TYPEMASK (UVM_KMF_VAONLY | UVM_KMF_PAGEABLE | UVM_KMF_WIRED)
  169 #define UVM_KMF_CANFAIL 0x8                     /* caller handles failure */
  170 #define UVM_KMF_ZERO    0x10                    /* want zero filled memory */
  171 #define UVM_KMF_EXEC    0x20                    /* need executable mapping */
  172 #define UVM_KMF_TRYLOCK UVM_FLAG_TRYLOCK        /* try locking only */
  173 #define UVM_KMF_NOWAIT  UVM_FLAG_NOWAIT         /* not allowed to sleep */
  174 #define UVM_KMF_WAITVA  UVM_FLAG_WAITVA         /* sleep for va */
  175 
  176 /*
  177  * the following defines the strategies for uvm_pagealloc_strat()
  178  */
  179 #define UVM_PGA_STRAT_NORMAL    0       /* high -> low free list walk */
  180 #define UVM_PGA_STRAT_ONLY      1       /* only specified free list */
  181 #define UVM_PGA_STRAT_FALLBACK  2       /* ONLY falls back on NORMAL */
  182 
  183 /*
  184  * flags for uvm_pagealloc_strat()
  185  */
  186 #define UVM_PGA_USERESERVE      0x0001  /* ok to use reserve pages */
  187 #define UVM_PGA_ZERO            0x0002  /* returned page must be zero'd */
  188 
  189 /*
  190  * flags for ubc_alloc()
  191  */
  192 #define UBC_READ        0x01
  193 #define UBC_WRITE       0x02
  194 #define UBC_FAULTBUSY   0x04
  195 
  196 /*
  197  * flags for ubc_release()
  198  */
  199 #define UBC_UNMAP       0x01
  200 
  201 /*
  202  * helpers for calling ubc_release()
  203  */
  204 #ifdef PMAP_CACHE_VIVT
  205 #define UBC_WANT_UNMAP(vp) (((vp)->v_flag & VTEXT) != 0)
  206 #else
  207 #define UBC_WANT_UNMAP(vp) FALSE
  208 #endif
  209 
  210 /*
  211  * flags for uvn_findpages().
  212  */
  213 #define UFP_ALL         0x00
  214 #define UFP_NOWAIT      0x01
  215 #define UFP_NOALLOC     0x02
  216 #define UFP_NOCACHE     0x04
  217 #define UFP_NORDONLY    0x08
  218 #define UFP_DIRTYONLY   0x10
  219 #define UFP_BACKWARD    0x20
  220 
  221 /*
  222  * lockflags that control the locking behavior of various functions.
  223  */
  224 #define UVM_LK_ENTER    0x00000001      /* map locked on entry */
  225 #define UVM_LK_EXIT     0x00000002      /* leave map locked on exit */
  226 
  227 /*
  228  * structures
  229  */
  230 
  231 struct buf;
  232 struct core;
  233 struct loadavg;
  234 struct mount;
  235 struct pglist;
  236 struct proc;
  237 struct uio;
  238 struct uvm_object;
  239 struct vm_anon;
  240 struct vmspace;
  241 struct pmap;
  242 struct vnode;
  243 struct pool;
  244 struct simplelock;
  245 struct vm_map_entry;
  246 struct vm_map;
  247 struct vm_page;
  248 struct vmtotal;
  249 
  250 /*
  251  * uvm_pctparam: parameter to be shown as percentage to user.
  252  */
  253 
  254 #define UVM_PCTPARAM_SHIFT      8
  255 #define UVM_PCTPARAM_SCALE      (1 << UVM_PCTPARAM_SHIFT)
  256 #define UVM_PCTPARAM_APPLY(pct, x) \
  257         (((x) * (pct)->pct_scaled) >> UVM_PCTPARAM_SHIFT)
  258 struct uvm_pctparam {
  259         int pct_pct;    /* percent [0, 100] */ /* should be the first member */
  260         int pct_scaled;
  261         int (*pct_check)(struct uvm_pctparam *, int);
  262 };
  263 
  264 /*
  265  * uvmexp: global data structures that are exported to parts of the kernel
  266  * other than the vm system.
  267  */
  268 
  269 struct uvmexp {
  270         /* vm_page constants */
  271         int pagesize;   /* size of a page (PAGE_SIZE): must be power of 2 */
  272         int pagemask;   /* page mask */
  273         int pageshift;  /* page shift */
  274 
  275         /* vm_page counters */
  276         int npages;     /* number of pages we manage */
  277         int free;       /* number of free pages */
  278         int paging;     /* number of pages in the process of being paged out */
  279         int wired;      /* number of wired pages */
  280 
  281         /*
  282          * Adding anything before this line will break binary compatibility
  283          * with top(1) on NetBSD 1.5.
  284          */
  285 
  286         int ncolors;    /* number of page color buckets: must be p-o-2 */
  287         int colormask;  /* color bucket mask */
  288 
  289         int zeropages;          /* number of zero'd pages */
  290         int reserve_pagedaemon; /* number of pages reserved for pagedaemon */
  291         int reserve_kernel;     /* number of pages reserved for kernel */
  292         int anonpages;          /* number of pages used by anon mappings */
  293         int filepages;          /* number of pages used by cached file data */
  294         int execpages;          /* number of pages used by cached exec data */
  295 
  296         /* pageout params */
  297         int freemin;    /* min number of free pages */
  298         int freetarg;   /* target number of free pages */
  299         int wiredmax;   /* max number of wired pages */
  300 
  301         /* swap */
  302         int nswapdev;   /* number of configured swap devices in system */
  303         int swpages;    /* number of PAGE_SIZE'ed swap pages */
  304         int swpgavail;  /* number of swap pages currently available */
  305         int swpginuse;  /* number of swap pages in use */
  306         int swpgonly;   /* number of swap pages in use, not also in RAM */
  307         int nswget;     /* number of times fault calls uvm_swap_get() */
  308 
  309         /* stat counters.  XXX: should be 64-bit counters */
  310         int faults;             /* page fault count */
  311         int traps;              /* trap count */
  312         int intrs;              /* interrupt count */
  313         int swtch;              /* context switch count */
  314         int softs;              /* software interrupt count */
  315         int syscalls;           /* system calls */
  316         int pageins;            /* pagein operation count */
  317                                 /* pageouts are in pdpageouts below */
  318         int swapins;            /* swapins */
  319         int swapouts;           /* swapouts */
  320         int pgswapin;           /* pages swapped in */
  321         int pgswapout;          /* pages swapped out */
  322         int forks;              /* forks */
  323         int forks_ppwait;       /* forks where parent waits */
  324         int forks_sharevm;      /* forks where vmspace is shared */
  325         int pga_zerohit;        /* pagealloc where zero wanted and zero
  326                                    was available */
  327         int pga_zeromiss;       /* pagealloc where zero wanted and zero
  328                                    not available */
  329         int zeroaborts;         /* number of times page zeroing was
  330                                    aborted */
  331         int colorhit;           /* pagealloc where we got optimal color */
  332         int colormiss;          /* pagealloc where we didn't */
  333 
  334         /* fault subcounters.  XXX: should be 64-bit counters */
  335         int fltnoram;   /* number of times fault was out of ram */
  336         int fltnoanon;  /* number of times fault was out of anons */
  337         int fltpgwait;  /* number of times fault had to wait on a page */
  338         int fltpgrele;  /* number of times fault found a released page */
  339         int fltrelck;   /* number of times fault relock called */
  340         int fltrelckok; /* number of times fault relock is a success */
  341         int fltanget;   /* number of times fault gets anon page */
  342         int fltanretry; /* number of times fault retrys an anon get */
  343         int fltamcopy;  /* number of times fault clears "needs copy" */
  344         int fltnamap;   /* number of times fault maps a neighbor anon page */
  345         int fltnomap;   /* number of times fault maps a neighbor obj page */
  346         int fltlget;    /* number of times fault does a locked pgo_get */
  347         int fltget;     /* number of times fault does an unlocked get */
  348         int flt_anon;   /* number of times fault anon (case 1a) */
  349         int flt_acow;   /* number of times fault anon cow (case 1b) */
  350         int flt_obj;    /* number of times fault is on object page (2a) */
  351         int flt_prcopy; /* number of times fault promotes with copy (2b) */
  352         int flt_przero; /* number of times fault promotes with zerofill (2b) */
  353 
  354         /* daemon counters.  XXX: should be 64-bit counters */
  355         int pdwoke;     /* number of times daemon woke up */
  356         int pdrevs;     /* number of times daemon rev'd clock hand */
  357         int pdswout;    /* number of times daemon called for swapout */
  358         int pdfreed;    /* number of pages daemon freed since boot */
  359         int pdscans;    /* number of pages daemon scanned since boot */
  360         int pdanscan;   /* number of anonymous pages scanned by daemon */
  361         int pdobscan;   /* number of object pages scanned by daemon */
  362         int pdreact;    /* number of pages daemon reactivated since boot */
  363         int pdbusy;     /* number of times daemon found a busy page */
  364         int pdpageouts; /* number of times daemon started a pageout */
  365         int pdpending;  /* number of times daemon got a pending pagout */
  366         int pddeact;    /* number of pages daemon deactivates */
  367         int pdreanon;   /* anon pages reactivated due to thresholds */
  368         int pdrefile;   /* file pages reactivated due to thresholds */
  369         int pdreexec;   /* executable pages reactivated due to thresholds */
  370 };
  371 
  372 /*
  373  * The following structure is 64-bit alignment safe.  New elements
  374  * should only be added to the end of this structure so binary
  375  * compatibility can be preserved.
  376  */
  377 struct uvmexp_sysctl {
  378         int64_t pagesize;
  379         int64_t pagemask;
  380         int64_t pageshift;
  381         int64_t npages;
  382         int64_t free;
  383         int64_t active;
  384         int64_t inactive;
  385         int64_t paging;
  386         int64_t wired;
  387         int64_t zeropages;
  388         int64_t reserve_pagedaemon;
  389         int64_t reserve_kernel;
  390         int64_t freemin;
  391         int64_t freetarg;
  392         int64_t inactarg; /* unused */
  393         int64_t wiredmax;
  394         int64_t nswapdev;
  395         int64_t swpages;
  396         int64_t swpginuse;
  397         int64_t swpgonly;
  398         int64_t nswget;
  399         int64_t unused1; /* used to be nanon */
  400         int64_t unused2; /* used to be nanonneeded */
  401         int64_t unused3; /* used to be nfreeanon */
  402         int64_t faults;
  403         int64_t traps;
  404         int64_t intrs;
  405         int64_t swtch;
  406         int64_t softs;
  407         int64_t syscalls;
  408         int64_t pageins;
  409         int64_t swapins;
  410         int64_t swapouts;
  411         int64_t pgswapin;
  412         int64_t pgswapout;
  413         int64_t forks;
  414         int64_t forks_ppwait;
  415         int64_t forks_sharevm;
  416         int64_t pga_zerohit;
  417         int64_t pga_zeromiss;
  418         int64_t zeroaborts;
  419         int64_t fltnoram;
  420         int64_t fltnoanon;
  421         int64_t fltpgwait;
  422         int64_t fltpgrele;
  423         int64_t fltrelck;
  424         int64_t fltrelckok;
  425         int64_t fltanget;
  426         int64_t fltanretry;
  427         int64_t fltamcopy;
  428         int64_t fltnamap;
  429         int64_t fltnomap;
  430         int64_t fltlget;
  431         int64_t fltget;
  432         int64_t flt_anon;
  433         int64_t flt_acow;
  434         int64_t flt_obj;
  435         int64_t flt_prcopy;
  436         int64_t flt_przero;
  437         int64_t pdwoke;
  438         int64_t pdrevs;
  439         int64_t pdswout;
  440         int64_t pdfreed;
  441         int64_t pdscans;
  442         int64_t pdanscan;
  443         int64_t pdobscan;
  444         int64_t pdreact;
  445         int64_t pdbusy;
  446         int64_t pdpageouts;
  447         int64_t pdpending;
  448         int64_t pddeact;
  449         int64_t anonpages;
  450         int64_t filepages;
  451         int64_t execpages;
  452         int64_t colorhit;
  453         int64_t colormiss;
  454         int64_t ncolors;
  455 };
  456 
  457 #ifdef _KERNEL
  458 /* we need this before including uvm_page.h on some platforms */
  459 extern struct uvmexp uvmexp;
  460 #endif
  461 
  462 /*
  463  * Finally, bring in standard UVM headers.
  464  */
  465 #include <sys/vmmeter.h>
  466 #include <sys/queue.h>
  467 #include <sys/lock.h>
  468 #include <uvm/uvm_param.h>
  469 #include <uvm/uvm_prot.h>
  470 #include <uvm/uvm_page.h>
  471 #include <uvm/uvm_pmap.h>
  472 #include <uvm/uvm_map.h>
  473 #include <uvm/uvm_pager.h>
  474 
  475 /*
  476  * Shareable process virtual address space.
  477  * May eventually be merged with vm_map.
  478  * Several fields are temporary (text, data stuff).
  479  */
  480 struct vmspace {
  481         struct  vm_map vm_map;  /* VM address map */
  482         int     vm_refcnt;      /* number of references *
  483                                  * note: protected by vm_map.ref_lock */
  484         caddr_t vm_shm;         /* SYS5 shared memory private data XXX */
  485 /* we copy from vm_startcopy to the end of the structure on fork */
  486 #define vm_startcopy vm_rssize
  487         segsz_t vm_rssize;      /* current resident set size in pages */
  488         segsz_t vm_swrss;       /* resident set size before last swap */
  489         segsz_t vm_tsize;       /* text size (pages) XXX */
  490         segsz_t vm_dsize;       /* data size (pages) XXX */
  491         segsz_t vm_ssize;       /* stack size (pages) */
  492         caddr_t vm_taddr;       /* user virtual address of text XXX */
  493         caddr_t vm_daddr;       /* user virtual address of data XXX */
  494         caddr_t vm_maxsaddr;    /* user VA at max stack growth */
  495         caddr_t vm_minsaddr;    /* user VA at top of stack */
  496 };
  497 #define VMSPACE_IS_KERNEL_P(vm) VM_MAP_IS_KERNEL(&(vm)->vm_map)
  498 
  499 #ifdef _KERNEL
  500 
  501 extern struct pool *uvm_aiobuf_pool;
  502 
  503 /*
  504  * used to keep state while iterating over the map for a core dump.
  505  */
  506 struct uvm_coredump_state {
  507         void *cookie;           /* opaque for the caller */
  508         vaddr_t start;          /* start of region */
  509         vaddr_t realend;        /* real end of region */
  510         vaddr_t end;            /* virtual end of region */
  511         vm_prot_t prot;         /* protection of region */
  512         int flags;              /* flags; see below */
  513 };
  514 
  515 #define UVM_COREDUMP_STACK      0x01    /* region is user stack */
  516 
  517 /*
  518  * the various kernel maps, owned by MD code
  519  */
  520 extern struct vm_map *exec_map;
  521 extern struct vm_map *kernel_map;
  522 extern struct vm_map *kmem_map;
  523 extern struct vm_map *mb_map;
  524 extern struct vm_map *phys_map;
  525 
  526 /*
  527  * macros
  528  */
  529 
  530 #define vm_resident_count(vm) (pmap_resident_count((vm)->vm_map.pmap))
  531 
  532 #include <sys/mallocvar.h>
  533 MALLOC_DECLARE(M_VMMAP);
  534 MALLOC_DECLARE(M_VMPMAP);
  535 
  536 /* vm_machdep.c */
  537 void            vmapbuf(struct buf *, vsize_t);
  538 void            vunmapbuf(struct buf *, vsize_t);
  539 #ifndef cpu_swapin
  540 void            cpu_swapin(struct lwp *);
  541 #endif
  542 #ifndef cpu_swapout
  543 void            cpu_swapout(struct lwp *);
  544 #endif
  545 
  546 /* uvm_aobj.c */
  547 struct uvm_object       *uao_create(vsize_t, int);
  548 void                    uao_detach(struct uvm_object *);
  549 void                    uao_detach_locked(struct uvm_object *);
  550 void                    uao_reference(struct uvm_object *);
  551 void                    uao_reference_locked(struct uvm_object *);
  552 
  553 /* uvm_bio.c */
  554 void                    ubc_init(void);
  555 void *                  ubc_alloc(struct uvm_object *, voff_t, vsize_t *, int,
  556                             int);
  557 void                    ubc_release(void *, int);
  558 void                    ubc_flush(struct uvm_object *, voff_t, voff_t);
  559 
  560 /* uvm_fault.c */
  561 #define uvm_fault(m, a, p) uvm_fault_internal(m, a, p, 0)
  562 int             uvm_fault_internal(struct vm_map *, vaddr_t, vm_prot_t, int);
  563                         /* handle a page fault */
  564 
  565 /* uvm_glue.c */
  566 #if defined(KGDB)
  567 void                    uvm_chgkprot(caddr_t, size_t, int);
  568 #endif
  569 void                    uvm_proc_fork(struct proc *, struct proc *, boolean_t);
  570 void                    uvm_lwp_fork(struct lwp *, struct lwp *,
  571                             void *, size_t, void (*)(void *), void *);
  572 int                     uvm_coredump_walkmap(struct proc *,
  573                             void *,
  574                             int (*)(struct proc *, void *,
  575                                     struct uvm_coredump_state *), void *);
  576 void                    uvm_proc_exit(struct proc *);
  577 void                    uvm_lwp_exit(struct lwp *);
  578 void                    uvm_init_limits(struct proc *);
  579 boolean_t               uvm_kernacc(caddr_t, size_t, int);
  580 __dead void             uvm_scheduler(void) __attribute__((noreturn));
  581 void                    uvm_swapin(struct lwp *);
  582 boolean_t               uvm_uarea_alloc(vaddr_t *);
  583 void                    uvm_uarea_drain(boolean_t);
  584 int                     uvm_vslock(struct vmspace *, void *, size_t, vm_prot_t);
  585 void                    uvm_vsunlock(struct vmspace *, void *, size_t);
  586 
  587 
  588 /* uvm_init.c */
  589 void                    uvm_init(void);
  590 
  591 /* uvm_io.c */
  592 int                     uvm_io(struct vm_map *, struct uio *);
  593 
  594 /* uvm_km.c */
  595 vaddr_t                 uvm_km_alloc(struct vm_map *, vsize_t, vsize_t,
  596                             uvm_flag_t);
  597 void                    uvm_km_free(struct vm_map *, vaddr_t, vsize_t,
  598                             uvm_flag_t);
  599 
  600 struct vm_map           *uvm_km_suballoc(struct vm_map *, vaddr_t *,
  601                             vaddr_t *, vsize_t, int, boolean_t,
  602                             struct vm_map_kernel *);
  603 vaddr_t                 uvm_km_alloc_poolpage(struct vm_map *, boolean_t);
  604 void                    uvm_km_free_poolpage(struct vm_map *, vaddr_t);
  605 vaddr_t                 uvm_km_alloc_poolpage_cache(struct vm_map *, boolean_t);
  606 void                    uvm_km_free_poolpage_cache(struct vm_map *, vaddr_t);
  607 void                    uvm_km_vacache_init(struct vm_map *,
  608                             const char *, size_t);
  609 
  610 /* uvm_map.c */
  611 int                     uvm_map(struct vm_map *, vaddr_t *, vsize_t,
  612                             struct uvm_object *, voff_t, vsize_t,
  613                             uvm_flag_t);
  614 int                     uvm_map_pageable(struct vm_map *, vaddr_t,
  615                             vaddr_t, boolean_t, int);
  616 int                     uvm_map_pageable_all(struct vm_map *, int, vsize_t);
  617 boolean_t               uvm_map_checkprot(struct vm_map *, vaddr_t,
  618                             vaddr_t, vm_prot_t);
  619 int                     uvm_map_protect(struct vm_map *, vaddr_t,
  620                             vaddr_t, vm_prot_t, boolean_t);
  621 struct vmspace          *uvmspace_alloc(vaddr_t, vaddr_t);
  622 void                    uvmspace_init(struct vmspace *, struct pmap *,
  623                             vaddr_t, vaddr_t);
  624 void                    uvmspace_exec(struct lwp *, vaddr_t, vaddr_t);
  625 struct vmspace          *uvmspace_fork(struct vmspace *);
  626 void                    uvmspace_addref(struct vmspace *);
  627 void                    uvmspace_free(struct vmspace *);
  628 void                    uvmspace_share(struct proc *, struct proc *);
  629 void                    uvmspace_unshare(struct lwp *);
  630 
  631 
  632 /* uvm_meter.c */
  633 void                    uvm_meter(void);
  634 int                     uvm_sysctl(int *, u_int, void *, size_t *,
  635                             void *, size_t, struct proc *);
  636 int                     uvm_pctparam_check(struct uvm_pctparam *, int);
  637 void                    uvm_pctparam_set(struct uvm_pctparam *, int);
  638 int                     uvm_pctparam_get(struct uvm_pctparam *);
  639 void                    uvm_pctparam_init(struct uvm_pctparam *, int,
  640                             int (*)(struct uvm_pctparam *, int));
  641 int                     uvm_pctparam_createsysctlnode(struct uvm_pctparam *,
  642                             const char *, const char *);
  643 
  644 /* uvm_mmap.c */
  645 int                     uvm_mmap(struct vm_map *, vaddr_t *, vsize_t,
  646                             vm_prot_t, vm_prot_t, int,
  647                             void *, voff_t, vsize_t);
  648 vaddr_t                 uvm_default_mapaddr(struct proc *, vaddr_t, vsize_t);
  649 
  650 /* uvm_mremap.c */
  651 int                     uvm_mremap(struct vm_map *, vaddr_t, vsize_t,
  652                             struct vm_map *, vaddr_t *, vsize_t,
  653                             struct proc *, int);
  654 #define UVM_MREMAP_FIXED        1
  655 
  656 /* uvm_object.c */
  657 int                     uobj_wirepages(struct uvm_object *uobj, off_t start,
  658                             off_t end);
  659 void                    uobj_unwirepages(struct uvm_object *uobj, off_t start,
  660                             off_t end);
  661 
  662 /* uvm_page.c */
  663 struct vm_page          *uvm_pagealloc_strat(struct uvm_object *,
  664                             voff_t, struct vm_anon *, int, int, int);
  665 #define uvm_pagealloc(obj, off, anon, flags) \
  666             uvm_pagealloc_strat((obj), (off), (anon), (flags), \
  667                                 UVM_PGA_STRAT_NORMAL, 0)
  668 void                    uvm_pagereplace(struct vm_page *,
  669                             struct vm_page *);
  670 void                    uvm_pagerealloc(struct vm_page *,
  671                             struct uvm_object *, voff_t);
  672 /* Actually, uvm_page_physload takes PF#s which need their own type */
  673 void                    uvm_page_physload(paddr_t, paddr_t, paddr_t,
  674                             paddr_t, int);
  675 void                    uvm_setpagesize(void);
  676 
  677 /* uvm_pager.c */
  678 void                    uvm_aio_biodone1(struct buf *);
  679 void                    uvm_aio_biodone(struct buf *);
  680 void                    uvm_aio_aiodone(struct buf *);
  681 
  682 /* uvm_pdaemon.c */
  683 void                    uvm_pageout(void *);
  684 void                    uvm_aiodone_daemon(void *);
  685 void                    uvm_estimatepageable(int *, int *);
  686 
  687 /* uvm_pglist.c */
  688 int                     uvm_pglistalloc(psize_t, paddr_t, paddr_t,
  689                             paddr_t, paddr_t, struct pglist *, int, int);
  690 void                    uvm_pglistfree(struct pglist *);
  691 
  692 /* uvm_swap.c */
  693 void                    uvm_swap_init(void);
  694 
  695 /* uvm_unix.c */
  696 int                     uvm_grow(struct proc *, vaddr_t);
  697 
  698 /* uvm_user.c */
  699 void                    uvm_deallocate(struct vm_map *, vaddr_t, vsize_t);
  700 
  701 /* uvm_vnode.c */
  702 void                    uvm_vnp_setsize(struct vnode *, voff_t);
  703 void                    uvm_vnp_sync(struct mount *);
  704 struct uvm_object       *uvn_attach(void *, vm_prot_t);
  705 int                     uvn_findpages(struct uvm_object *, voff_t,
  706                             int *, struct vm_page **, int);
  707 void                    uvm_vnp_zerorange(struct vnode *, off_t, size_t);
  708 boolean_t               uvn_text_p(struct uvm_object *);
  709 boolean_t               uvn_clean_p(struct uvm_object *);
  710 boolean_t               uvn_needs_writefault_p(struct uvm_object *);
  711 
  712 /* kern_malloc.c */
  713 void                    kmeminit_nkmempages(void);
  714 void                    kmeminit(void);
  715 extern int              nkmempages;
  716 
  717 #endif /* _KERNEL */
  718 
  719 #endif /* _UVM_UVM_EXTERN_H_ */

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