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 1.98.8.1 2005/09/18 20:09:50 tron 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 typedef int vm_fault_t;
   88 
   89 typedef int vm_inherit_t;       /* XXX: inheritance codes */
   90 typedef off_t voff_t;           /* XXX: offset 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 */
  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 
  149 /* macros to extract info */
  150 #define UVM_PROTECTION(X)       ((X) & UVM_PROT_MASK)
  151 #define UVM_INHERIT(X)          (((X) & UVM_INH_MASK) >> 4)
  152 #define UVM_MAXPROTECTION(X)    (((X) >> 8) & UVM_PROT_MASK)
  153 #define UVM_ADVICE(X)           (((X) >> 12) & UVM_ADV_MASK)
  154 
  155 #define UVM_MAPFLAG(PROT,MAXPROT,INH,ADVICE,FLAGS) \
  156         ((MAXPROT << 8)|(PROT)|(INH)|((ADVICE) << 12)|(FLAGS))
  157 
  158 /* magic offset value: offset not known(obj) or don't care(!obj) */
  159 #define UVM_UNKNOWN_OFFSET ((voff_t) -1)
  160 
  161 /*
  162  * the following defines are for uvm_km_kmemalloc's flags
  163  */
  164 #define UVM_KMF_VALLOC  0x1                     /* allocate VA only */
  165 #define UVM_KMF_CANFAIL 0x2                     /* caller handles failure */
  166 #define UVM_KMF_TRYLOCK UVM_FLAG_TRYLOCK        /* try locking only */
  167 #define UVM_KMF_NOWAIT  UVM_FLAG_NOWAIT         /* not allowed to sleep */
  168 
  169 /*
  170  * the following defines the strategies for uvm_pagealloc_strat()
  171  */
  172 #define UVM_PGA_STRAT_NORMAL    0       /* high -> low free list walk */
  173 #define UVM_PGA_STRAT_ONLY      1       /* only specified free list */
  174 #define UVM_PGA_STRAT_FALLBACK  2       /* ONLY falls back on NORMAL */
  175 
  176 /*
  177  * flags for uvm_pagealloc_strat()
  178  */
  179 #define UVM_PGA_USERESERVE      0x0001  /* ok to use reserve pages */
  180 #define UVM_PGA_ZERO            0x0002  /* returned page must be zero'd */
  181 
  182 /*
  183  * flags for ubc_alloc()
  184  */
  185 #define UBC_READ        0x01
  186 #define UBC_WRITE       0x02
  187 #define UBC_FAULTBUSY   0x04
  188 
  189 /*
  190  * flags for ubc_release()
  191  */
  192 #define UBC_UNMAP       0x01
  193 
  194 /*
  195  * helpers for calling ubc_release()
  196  */
  197 #ifdef PMAP_CACHE_VIVT
  198 #define UBC_WANT_UNMAP(vp) (((vp)->v_flag & VTEXT) != 0)
  199 #else
  200 #define UBC_WANT_UNMAP(vp) FALSE
  201 #endif
  202 
  203 /*
  204  * flags for uvn_findpages().
  205  */
  206 #define UFP_ALL         0x00
  207 #define UFP_NOWAIT      0x01
  208 #define UFP_NOALLOC     0x02
  209 #define UFP_NOCACHE     0x04
  210 #define UFP_NORDONLY    0x08
  211 #define UFP_DIRTYONLY   0x10
  212 #define UFP_BACKWARD    0x20
  213 
  214 /*
  215  * lockflags that control the locking behavior of various functions.
  216  */
  217 #define UVM_LK_ENTER    0x00000001      /* map locked on entry */
  218 #define UVM_LK_EXIT     0x00000002      /* leave map locked on exit */
  219 
  220 /*
  221  * structures
  222  */
  223 
  224 struct buf;
  225 struct core;
  226 struct loadavg;
  227 struct mount;
  228 struct pglist;
  229 struct proc;
  230 struct ucred;
  231 struct uio;
  232 struct uvm_object;
  233 struct vm_anon;
  234 struct vmspace;
  235 struct pmap;
  236 struct vnode;
  237 struct pool;
  238 struct simplelock;
  239 struct vm_map_entry;
  240 struct vm_map;
  241 struct vm_page;
  242 struct vmspace;
  243 struct vmtotal;
  244 
  245 /*
  246  * uvmexp: global data structures that are exported to parts of the kernel
  247  * other than the vm system.
  248  */
  249 
  250 struct uvmexp {
  251         /* vm_page constants */
  252         int pagesize;   /* size of a page (PAGE_SIZE): must be power of 2 */
  253         int pagemask;   /* page mask */
  254         int pageshift;  /* page shift */
  255 
  256         /* vm_page counters */
  257         int npages;     /* number of pages we manage */
  258         int free;       /* number of free pages */
  259         int active;     /* number of active pages */
  260         int inactive;   /* number of pages that we free'd but may want back */
  261         int paging;     /* number of pages in the process of being paged out */
  262         int wired;      /* number of wired pages */
  263 
  264         /*
  265          * Adding anything before this line will break binary compatibility
  266          * with top(1) on NetBSD 1.5.
  267          */
  268 
  269         int ncolors;    /* number of page color buckets: must be p-o-2 */
  270         int colormask;  /* color bucket mask */
  271 
  272         int zeropages;          /* number of zero'd pages */
  273         int reserve_pagedaemon; /* number of pages reserved for pagedaemon */
  274         int reserve_kernel;     /* number of pages reserved for kernel */
  275         int anonpages;          /* number of pages used by anon mappings */
  276         int filepages;          /* number of pages used by cached file data */
  277         int execpages;          /* number of pages used by cached exec data */
  278 
  279         /* pageout params */
  280         int freemin;    /* min number of free pages */
  281         int freetarg;   /* target number of free pages */
  282         int inactarg;   /* target number of inactive pages */
  283         int wiredmax;   /* max number of wired pages */
  284         int anonmin;    /* min threshold for anon pages */
  285         int execmin;    /* min threshold for executable pages */
  286         int filemin;    /* min threshold for file pages */
  287         int anonminpct; /* min percent anon pages */
  288         int execminpct; /* min percent executable pages */
  289         int fileminpct; /* min percent file pages */
  290         int anonmax;    /* max threshold for anon pages */
  291         int execmax;    /* max threshold for executable pages */
  292         int filemax;    /* max threshold for file pages */
  293         int anonmaxpct; /* max percent anon pages */
  294         int execmaxpct; /* max percent executable pages */
  295         int filemaxpct; /* max percent file pages */
  296 
  297         /* swap */
  298         int nswapdev;   /* number of configured swap devices in system */
  299         int swpages;    /* number of PAGE_SIZE'ed swap pages */
  300         int swpgavail;  /* number of swap pages currently available */
  301         int swpginuse;  /* number of swap pages in use */
  302         int swpgonly;   /* number of swap pages in use, not also in RAM */
  303         int nswget;     /* number of times fault calls uvm_swap_get() */
  304         int nanon;      /* number total of anon's in system */
  305         int nanonneeded;/* number of anons currently needed */
  306         int nfreeanon;  /* number of free anon's */
  307 
  308         /* stat counters */
  309         int faults;             /* page fault count */
  310         int traps;              /* trap count */
  311         int intrs;              /* interrupt count */
  312         int swtch;              /* context switch count */
  313         int softs;              /* software interrupt count */
  314         int syscalls;           /* system calls */
  315         int pageins;            /* pagein operation count */
  316                                 /* pageouts are in pdpageouts below */
  317         int swapins;            /* swapins */
  318         int swapouts;           /* swapouts */
  319         int pgswapin;           /* pages swapped in */
  320         int pgswapout;          /* pages swapped out */
  321         int forks;              /* forks */
  322         int forks_ppwait;       /* forks where parent waits */
  323         int forks_sharevm;      /* forks where vmspace is shared */
  324         int pga_zerohit;        /* pagealloc where zero wanted and zero
  325                                    was available */
  326         int pga_zeromiss;       /* pagealloc where zero wanted and zero
  327                                    not available */
  328         int zeroaborts;         /* number of times page zeroing was
  329                                    aborted */
  330         int colorhit;           /* pagealloc where we got optimal color */
  331         int colormiss;          /* pagealloc where we didn't */
  332 
  333         /* fault subcounters */
  334         int fltnoram;   /* number of times fault was out of ram */
  335         int fltnoanon;  /* number of times fault was out of anons */
  336         int fltpgwait;  /* number of times fault had to wait on a page */
  337         int fltpgrele;  /* number of times fault found a released page */
  338         int fltrelck;   /* number of times fault relock called */
  339         int fltrelckok; /* number of times fault relock is a success */
  340         int fltanget;   /* number of times fault gets anon page */
  341         int fltanretry; /* number of times fault retrys an anon get */
  342         int fltamcopy;  /* number of times fault clears "needs copy" */
  343         int fltnamap;   /* number of times fault maps a neighbor anon page */
  344         int fltnomap;   /* number of times fault maps a neighbor obj page */
  345         int fltlget;    /* number of times fault does a locked pgo_get */
  346         int fltget;     /* number of times fault does an unlocked get */
  347         int flt_anon;   /* number of times fault anon (case 1a) */
  348         int flt_acow;   /* number of times fault anon cow (case 1b) */
  349         int flt_obj;    /* number of times fault is on object page (2a) */
  350         int flt_prcopy; /* number of times fault promotes with copy (2b) */
  351         int flt_przero; /* number of times fault promotes with zerofill (2b) */
  352 
  353         /* daemon counters */
  354         int pdwoke;     /* number of times daemon woke up */
  355         int pdrevs;     /* number of times daemon rev'd clock hand */
  356         int pdswout;    /* number of times daemon called for swapout */
  357         int pdfreed;    /* number of pages daemon freed since boot */
  358         int pdscans;    /* number of pages daemon scanned since boot */
  359         int pdanscan;   /* number of anonymous pages scanned by daemon */
  360         int pdobscan;   /* number of object pages scanned by daemon */
  361         int pdreact;    /* number of pages daemon reactivated since boot */
  362         int pdbusy;     /* number of times daemon found a busy page */
  363         int pdpageouts; /* number of times daemon started a pageout */
  364         int pdpending;  /* number of times daemon got a pending pagout */
  365         int pddeact;    /* number of pages daemon deactivates */
  366         int pdreanon;   /* anon pages reactivated due to thresholds */
  367         int pdrefile;   /* file pages reactivated due to thresholds */
  368         int pdreexec;   /* executable pages reactivated due to thresholds */
  369 };
  370 
  371 /*
  372  * The following structure is 64-bit alignment safe.  New elements
  373  * should only be added to the end of this structure so binary
  374  * compatibility can be preserved.
  375  */
  376 struct uvmexp_sysctl {
  377         int64_t pagesize;
  378         int64_t pagemask;
  379         int64_t pageshift;
  380         int64_t npages;
  381         int64_t free;
  382         int64_t active;
  383         int64_t inactive;
  384         int64_t paging;
  385         int64_t wired;
  386         int64_t zeropages;
  387         int64_t reserve_pagedaemon;
  388         int64_t reserve_kernel;
  389         int64_t freemin;
  390         int64_t freetarg;
  391         int64_t inactarg;
  392         int64_t wiredmax;
  393         int64_t nswapdev;
  394         int64_t swpages;
  395         int64_t swpginuse;
  396         int64_t swpgonly;
  397         int64_t nswget;
  398         int64_t nanon;
  399         int64_t nanonneeded;
  400         int64_t nfreeanon;
  401         int64_t faults;
  402         int64_t traps;
  403         int64_t intrs;
  404         int64_t swtch;
  405         int64_t softs;
  406         int64_t syscalls;
  407         int64_t pageins;
  408         int64_t swapins;
  409         int64_t swapouts;
  410         int64_t pgswapin;
  411         int64_t pgswapout;
  412         int64_t forks;
  413         int64_t forks_ppwait;
  414         int64_t forks_sharevm;
  415         int64_t pga_zerohit;
  416         int64_t pga_zeromiss;
  417         int64_t zeroaborts;
  418         int64_t fltnoram;
  419         int64_t fltnoanon;
  420         int64_t fltpgwait;
  421         int64_t fltpgrele;
  422         int64_t fltrelck;
  423         int64_t fltrelckok;
  424         int64_t fltanget;
  425         int64_t fltanretry;
  426         int64_t fltamcopy;
  427         int64_t fltnamap;
  428         int64_t fltnomap;
  429         int64_t fltlget;
  430         int64_t fltget;
  431         int64_t flt_anon;
  432         int64_t flt_acow;
  433         int64_t flt_obj;
  434         int64_t flt_prcopy;
  435         int64_t flt_przero;
  436         int64_t pdwoke;
  437         int64_t pdrevs;
  438         int64_t pdswout;
  439         int64_t pdfreed;
  440         int64_t pdscans;
  441         int64_t pdanscan;
  442         int64_t pdobscan;
  443         int64_t pdreact;
  444         int64_t pdbusy;
  445         int64_t pdpageouts;
  446         int64_t pdpending;
  447         int64_t pddeact;
  448         int64_t anonpages;
  449         int64_t filepages;
  450         int64_t execpages;
  451         int64_t colorhit;
  452         int64_t colormiss;
  453         int64_t ncolors;
  454 };
  455 
  456 #ifdef _KERNEL
  457 /* we need this before including uvm_page.h on some platforms */
  458 extern struct uvmexp uvmexp;
  459 #endif
  460 
  461 /*
  462  * Finally, bring in standard UVM headers.
  463  */
  464 #include <sys/vmmeter.h>
  465 #include <sys/queue.h>
  466 #include <uvm/uvm_param.h>
  467 #include <sys/lock.h>
  468 #include <uvm/uvm_prot.h>
  469 #include <uvm/uvm_page.h>
  470 #include <uvm/uvm_pmap.h>
  471 #include <uvm/uvm_map.h>
  472 #include <uvm/uvm_fault.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 
  498 #ifdef _KERNEL
  499 
  500 extern struct pool *uvm_aiobuf_pool;
  501 
  502 /*
  503  * used to keep state while iterating over the map for a core dump.
  504  */
  505 struct uvm_coredump_state {
  506         void *cookie;           /* opaque for the caller */
  507         vaddr_t start;          /* start of region */
  508         vaddr_t end;            /* end of region */
  509         vm_prot_t prot;         /* protection of region */
  510         int flags;              /* flags; see below */
  511 };
  512 
  513 #define UVM_COREDUMP_STACK      0x01    /* region is user stack */
  514 #define UVM_COREDUMP_NODUMP     0x02    /* don't actually dump this region */
  515 
  516 /*
  517  * the various kernel maps, owned by MD code
  518  */
  519 extern struct vm_map *exec_map;
  520 extern struct vm_map *kernel_map;
  521 extern struct vm_map *kmem_map;
  522 extern struct vm_map *mb_map;
  523 extern struct vm_map *phys_map;
  524 
  525 /*
  526  * macros
  527  */
  528 
  529 /* zalloc zeros memory, alloc does not */
  530 #define uvm_km_zalloc(MAP,SIZE) uvm_km_alloc1(MAP,SIZE,TRUE)
  531 #define uvm_km_alloc(MAP,SIZE)  uvm_km_alloc1(MAP,SIZE,FALSE)
  532 
  533 #define vm_resident_count(vm) (pmap_resident_count((vm)->vm_map.pmap))
  534 
  535 #include <sys/mallocvar.h>
  536 MALLOC_DECLARE(M_VMMAP);
  537 MALLOC_DECLARE(M_VMPMAP);
  538 
  539 /* vm_machdep.c */
  540 void            vmapbuf(struct buf *, vsize_t);
  541 void            vunmapbuf(struct buf *, vsize_t);
  542 #ifndef cpu_swapin
  543 void            cpu_swapin(struct lwp *);
  544 #endif
  545 #ifndef cpu_swapout
  546 void            cpu_swapout(struct lwp *);
  547 #endif
  548 
  549 /* uvm_aobj.c */
  550 struct uvm_object       *uao_create(vsize_t, int);
  551 void                    uao_detach(struct uvm_object *);
  552 void                    uao_detach_locked(struct uvm_object *);
  553 void                    uao_reference(struct uvm_object *);
  554 void                    uao_reference_locked(struct uvm_object *);
  555 
  556 /* uvm_bio.c */
  557 void                    ubc_init(void);
  558 void *                  ubc_alloc(struct uvm_object *, voff_t, vsize_t *, int);
  559 void                    ubc_release(void *, int);
  560 void                    ubc_flush(struct uvm_object *, voff_t, voff_t);
  561 
  562 /* uvm_fault.c */
  563 int                     uvm_fault(struct vm_map *, vaddr_t, vm_fault_t,
  564                             vm_prot_t);
  565                                 /* handle a page fault */
  566 
  567 /* uvm_glue.c */
  568 #if defined(KGDB)
  569 void                    uvm_chgkprot(caddr_t, size_t, int);
  570 #endif
  571 void                    uvm_proc_fork(struct proc *, struct proc *, boolean_t);
  572 void                    uvm_lwp_fork(struct lwp *, struct lwp *,
  573                             void *, size_t, void (*)(void *), void *);
  574 int                     uvm_coredump_walkmap(struct proc *,
  575                             struct vnode *, struct ucred *,
  576                             int (*)(struct proc *, struct vnode *,
  577                                     struct ucred *,
  578                                     struct uvm_coredump_state *), void *);
  579 void                    uvm_proc_exit(struct proc *);
  580 void                    uvm_lwp_exit(struct lwp *);
  581 void                    uvm_init_limits(struct proc *);
  582 boolean_t               uvm_kernacc(caddr_t, size_t, int);
  583 __dead void             uvm_scheduler(void) __attribute__((noreturn));
  584 void                    uvm_swapin(struct lwp *);
  585 boolean_t               uvm_uarea_alloc(vaddr_t *);
  586 void                    uvm_uarea_drain(boolean_t);
  587 int                     uvm_vslock(struct proc *, caddr_t, size_t, vm_prot_t);
  588 void                    uvm_vsunlock(struct proc *, caddr_t, size_t);
  589 
  590 
  591 /* uvm_init.c */
  592 void                    uvm_init(void);
  593 
  594 /* uvm_io.c */
  595 int                     uvm_io(struct vm_map *, struct uio *);
  596 
  597 /* uvm_km.c */
  598 vaddr_t                 uvm_km_alloc1(struct vm_map *, vsize_t, boolean_t);
  599 void                    uvm_km_free(struct vm_map *, vaddr_t, vsize_t);
  600 #define uvm_km_free_wakeup(map, start, size) uvm_km_free((map), (start), (size))
  601 vaddr_t                 uvm_km_kmemalloc1(struct vm_map *, struct
  602                             uvm_object *, vsize_t, vsize_t, voff_t, int);
  603 vaddr_t                 uvm_km_kmemalloc(struct vm_map *, struct
  604                             uvm_object *, vsize_t, int);
  605 struct vm_map           *uvm_km_suballoc(struct vm_map *, vaddr_t *,
  606                             vaddr_t *, vsize_t, int, boolean_t,
  607                             struct vm_map_kernel *);
  608 vaddr_t                 uvm_km_valloc1(struct vm_map *, vsize_t,
  609                             vsize_t, voff_t, uvm_flag_t);
  610 vaddr_t                 uvm_km_valloc(struct vm_map *, vsize_t);
  611 vaddr_t                 uvm_km_valloc_align(struct vm_map *, vsize_t,
  612                             vsize_t);
  613 vaddr_t                 uvm_km_valloc_wait(struct vm_map *, vsize_t);
  614 vaddr_t                 uvm_km_valloc_prefer_wait(struct vm_map *, vsize_t,
  615                             voff_t);
  616 vaddr_t                 uvm_km_alloc_poolpage1(struct vm_map *,
  617                             struct uvm_object *, boolean_t);
  618 void                    uvm_km_free_poolpage1(struct vm_map *, vaddr_t);
  619 vaddr_t                 uvm_km_alloc_poolpage_cache(struct vm_map *,
  620                             struct uvm_object *, boolean_t);
  621 void                    uvm_km_free_poolpage_cache(struct vm_map *, vaddr_t);
  622 void                    uvm_km_vacache_init(struct vm_map *,
  623                             const char *, size_t);
  624 
  625 extern __inline__ vaddr_t
  626 uvm_km_kmemalloc(struct vm_map *map, struct uvm_object *obj, vsize_t sz, int flags)
  627 {
  628         return uvm_km_kmemalloc1(map, obj, sz, 0, UVM_UNKNOWN_OFFSET, flags);
  629 }
  630 
  631 extern __inline__ vaddr_t
  632 uvm_km_valloc(struct vm_map *map, vsize_t sz)
  633 {
  634         return uvm_km_valloc1(map, sz, 0, UVM_UNKNOWN_OFFSET, UVM_KMF_NOWAIT);
  635 }
  636 
  637 extern __inline__ vaddr_t
  638 uvm_km_valloc_align(struct vm_map *map, vsize_t sz, vsize_t align)
  639 {
  640         return uvm_km_valloc1(map, sz, align, UVM_UNKNOWN_OFFSET, UVM_KMF_NOWAIT);
  641 }
  642 
  643 extern __inline__ vaddr_t
  644 uvm_km_valloc_prefer_wait(struct vm_map *map, vsize_t sz, voff_t prefer)
  645 {
  646         return uvm_km_valloc1(map, sz, 0, prefer, 0);
  647 }
  648 
  649 extern __inline__ vaddr_t
  650 uvm_km_valloc_wait(struct vm_map *map, vsize_t sz)
  651 {
  652         return uvm_km_valloc1(map, sz, 0, UVM_UNKNOWN_OFFSET, 0);
  653 }
  654 
  655 #define uvm_km_alloc_poolpage(waitok)                                   \
  656         uvm_km_alloc_poolpage1(kmem_map, NULL, (waitok))
  657 #define uvm_km_free_poolpage(addr)                                      \
  658         uvm_km_free_poolpage1(kmem_map, (addr))
  659 
  660 /* uvm_map.c */
  661 int                     uvm_map(struct vm_map *, vaddr_t *, vsize_t,
  662                             struct uvm_object *, voff_t, vsize_t,
  663                             uvm_flag_t);
  664 int                     uvm_map_pageable(struct vm_map *, vaddr_t,
  665                             vaddr_t, boolean_t, int);
  666 int                     uvm_map_pageable_all(struct vm_map *, int, vsize_t);
  667 boolean_t               uvm_map_checkprot(struct vm_map *, vaddr_t,
  668                             vaddr_t, vm_prot_t);
  669 int                     uvm_map_protect(struct vm_map *, vaddr_t,
  670                             vaddr_t, vm_prot_t, boolean_t);
  671 struct vmspace          *uvmspace_alloc(vaddr_t, vaddr_t);
  672 void                    uvmspace_init(struct vmspace *, struct pmap *,
  673                             vaddr_t, vaddr_t);
  674 void                    uvmspace_exec(struct lwp *, vaddr_t, vaddr_t);
  675 struct vmspace          *uvmspace_fork(struct vmspace *);
  676 void                    uvmspace_free(struct vmspace *);
  677 void                    uvmspace_share(struct proc *, struct proc *);
  678 void                    uvmspace_unshare(struct lwp *);
  679 
  680 
  681 /* uvm_meter.c */
  682 void                    uvm_meter(void);
  683 int                     uvm_sysctl(int *, u_int, void *, size_t *,
  684                             void *, size_t, struct proc *);
  685 
  686 /* uvm_mmap.c */
  687 int                     uvm_mmap(struct vm_map *, vaddr_t *, vsize_t,
  688                             vm_prot_t, vm_prot_t, int,
  689                             void *, voff_t, vsize_t);
  690 vaddr_t                 uvm_default_mapaddr(struct proc *, vaddr_t, vsize_t);
  691 
  692 /* uvm_page.c */
  693 struct vm_page          *uvm_pagealloc_strat(struct uvm_object *,
  694                             voff_t, struct vm_anon *, int, int, int);
  695 #define uvm_pagealloc(obj, off, anon, flags) \
  696             uvm_pagealloc_strat((obj), (off), (anon), (flags), \
  697                                 UVM_PGA_STRAT_NORMAL, 0)
  698 void                    uvm_pagereplace(struct vm_page *,
  699                             struct vm_page *);
  700 void                    uvm_pagerealloc(struct vm_page *,
  701                             struct uvm_object *, voff_t);
  702 /* Actually, uvm_page_physload takes PF#s which need their own type */
  703 void                    uvm_page_physload(paddr_t, paddr_t, paddr_t,
  704                             paddr_t, int);
  705 void                    uvm_setpagesize(void);
  706 
  707 /* uvm_pager.c */
  708 void                    uvm_aio_biodone1(struct buf *);
  709 void                    uvm_aio_biodone(struct buf *);
  710 void                    uvm_aio_aiodone(struct buf *);
  711 
  712 /* uvm_pdaemon.c */
  713 void                    uvm_pageout(void *);
  714 void                    uvm_aiodone_daemon(void *);
  715 
  716 /* uvm_pglist.c */
  717 int                     uvm_pglistalloc(psize_t, paddr_t, paddr_t,
  718                             paddr_t, paddr_t, struct pglist *, int, int);
  719 void                    uvm_pglistfree(struct pglist *);
  720 
  721 /* uvm_swap.c */
  722 void                    uvm_swap_init(void);
  723 
  724 /* uvm_unix.c */
  725 int                     uvm_grow(struct proc *, vaddr_t);
  726 
  727 /* uvm_user.c */
  728 void                    uvm_deallocate(struct vm_map *, vaddr_t, vsize_t);
  729 
  730 /* uvm_vnode.c */
  731 void                    uvm_vnp_setsize(struct vnode *, voff_t);
  732 void                    uvm_vnp_sync(struct mount *);
  733 struct uvm_object       *uvn_attach(void *, vm_prot_t);
  734 int                     uvn_findpages(struct uvm_object *, voff_t,
  735                             int *, struct vm_page **, int);
  736 void                    uvm_vnp_zerorange(struct vnode *, off_t, size_t);
  737 
  738 /* kern_malloc.c */
  739 void                    kmeminit_nkmempages(void);
  740 void                    kmeminit(void);
  741 extern int              nkmempages;
  742 
  743 #endif /* _KERNEL */
  744 
  745 #endif /* _UVM_UVM_EXTERN_H_ */

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