FreeBSD/Linux Kernel Cross Reference
sys/uvm/uvm_extern.h

     /*      $NetBSD: uvm_extern.h,v 1.122.2.1 2006/12/09 11:53:42 bouyer Exp $      */
     
     /*
      *
      * Copyright (c) 1997 Charles D. Cranor and Washington University.
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by Charles D. Cranor and
     *      Washington University.
     * 4. The name of the author may not be used to endorse or promote products
     *    derived from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     *
     * from: Id: uvm_extern.h,v 1.1.2.21 1998/02/07 01:16:53 chs Exp
     */
    
    /*-
     * Copyright (c) 1991, 1992, 1993
     *      The Regents of the University of California.  All rights reserved.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)vm_extern.h 8.5 (Berkeley) 5/3/95
     */
    
    #ifndef _UVM_UVM_EXTERN_H_
    #define _UVM_UVM_EXTERN_H_
    
    /*
     * uvm_extern.h: this file defines the external interface to the VM system.
     *
     * this should be the only file included by non-VM parts of the kernel
     * which need access to VM services.   if you want to know the interface
     * to the MI VM layer without knowing the details, this is the file to
     * learn.
     *
     * NOTE: vm system calls are prototyped in syscallargs.h
     */
    
    /*
     * typedefs, necessary for standard UVM headers.
     */
    
    typedef unsigned int uvm_flag_t;
    
    typedef int vm_inherit_t;       /* XXX: inheritance codes */
    typedef off_t voff_t;           /* XXX: offset within a uvm_object */
    typedef voff_t pgoff_t;         /* XXX: number of pages within a uvm object */
    
    /*
     * defines
     */
    
    /*
     * the following defines are for uvm_map and functions which call it.
     */
    
   /* protections bits */
   #define UVM_PROT_MASK   0x07    /* protection mask */
   #define UVM_PROT_NONE   0x00    /* protection none */
   #define UVM_PROT_ALL    0x07    /* everything */
   #define UVM_PROT_READ   0x01    /* read */
   #define UVM_PROT_WRITE  0x02    /* write */
   #define UVM_PROT_EXEC   0x04    /* exec */
   
   /* protection short codes */
   #define UVM_PROT_R      0x01    /* read */
   #define UVM_PROT_W      0x02    /* write */
   #define UVM_PROT_RW     0x03    /* read-write */
   #define UVM_PROT_X      0x04    /* exec */
   #define UVM_PROT_RX     0x05    /* read-exec */
   #define UVM_PROT_WX     0x06    /* write-exec */
   #define UVM_PROT_RWX    0x07    /* read-write-exec */
   
   /* 0x08: not used */
   
   /* inherit codes */
   #define UVM_INH_MASK    0x30    /* inherit mask */
   #define UVM_INH_SHARE   0x00    /* "share" */
   #define UVM_INH_COPY    0x10    /* "copy" */
   #define UVM_INH_NONE    0x20    /* "none" */
   #define UVM_INH_DONATE  0x30    /* "donate" << not used */
   
   /* 0x40, 0x80: not used */
   
   /* bits 0x700: max protection, 0x800: not used */
   
   /* bits 0x7000: advice, 0x8000: not used */
   /* advice: matches MADV_* from sys/mman.h and POSIX_FADV_* from sys/fcntl.h */
   #define UVM_ADV_NORMAL  0x0     /* 'normal' */
   #define UVM_ADV_RANDOM  0x1     /* 'random' */
   #define UVM_ADV_SEQUENTIAL 0x2  /* 'sequential' */
   /* 0x3: will need, 0x4: dontneed */
   #define UVM_ADV_MASK    0x7     /* mask */
   
   /* bits 0xffff0000: mapping flags */
   #define UVM_FLAG_FIXED   0x010000 /* find space */
   #define UVM_FLAG_OVERLAY 0x020000 /* establish overlay */
   #define UVM_FLAG_NOMERGE 0x040000 /* don't merge map entries */
   #define UVM_FLAG_COPYONW 0x080000 /* set copy_on_write flag */
   #define UVM_FLAG_AMAPPAD 0x100000 /* for bss: pad amap to reduce malloc() */
   #define UVM_FLAG_TRYLOCK 0x200000 /* fail if we can not lock map */
   #define UVM_FLAG_NOWAIT  0x400000 /* not allowed to sleep */
   #define UVM_FLAG_QUANTUM 0x800000 /* entry never be splitted later */
   #define UVM_FLAG_WAITVA  0x1000000 /* wait for va */
   #define UVM_FLAG_VAONLY  0x2000000 /* unmap: no pages are mapped */
   
   /* macros to extract info */
   #define UVM_PROTECTION(X)       ((X) & UVM_PROT_MASK)
   #define UVM_INHERIT(X)          (((X) & UVM_INH_MASK) >> 4)
   #define UVM_MAXPROTECTION(X)    (((X) >> 8) & UVM_PROT_MASK)
   #define UVM_ADVICE(X)           (((X) >> 12) & UVM_ADV_MASK)
   
   #define UVM_MAPFLAG(PROT,MAXPROT,INH,ADVICE,FLAGS) \
           (((MAXPROT) << 8)|(PROT)|(INH)|((ADVICE) << 12)|(FLAGS))
   
   /* magic offset value: offset not known(obj) or don't care(!obj) */
   #define UVM_UNKNOWN_OFFSET ((voff_t) -1)
   
   /*
    * the following defines are for uvm_km_alloc/free's flags
    */
   #define UVM_KMF_WIRED   0x1                     /* allocation type: wired */
   #define UVM_KMF_PAGEABLE 0x2                    /* allocation type: pageable */
   #define UVM_KMF_VAONLY  0x4                     /* allocation type: VA only */
   #define UVM_KMF_TYPEMASK (UVM_KMF_VAONLY | UVM_KMF_PAGEABLE | UVM_KMF_WIRED)
   #define UVM_KMF_CANFAIL 0x8                     /* caller handles failure */
   #define UVM_KMF_ZERO    0x10                    /* want zero filled memory */
   #define UVM_KMF_EXEC    0x20                    /* need executable mapping */
   #define UVM_KMF_TRYLOCK UVM_FLAG_TRYLOCK        /* try locking only */
   #define UVM_KMF_NOWAIT  UVM_FLAG_NOWAIT         /* not allowed to sleep */
   #define UVM_KMF_WAITVA  UVM_FLAG_WAITVA         /* sleep for va */
   
   /*
    * the following defines the strategies for uvm_pagealloc_strat()
    */
   #define UVM_PGA_STRAT_NORMAL    0       /* high -> low free list walk */
   #define UVM_PGA_STRAT_ONLY      1       /* only specified free list */
   #define UVM_PGA_STRAT_FALLBACK  2       /* ONLY falls back on NORMAL */
   
   /*
    * flags for uvm_pagealloc_strat()
    */
   #define UVM_PGA_USERESERVE      0x0001  /* ok to use reserve pages */
   #define UVM_PGA_ZERO            0x0002  /* returned page must be zero'd */
   
   /*
    * flags for ubc_alloc()
    */
   #define UBC_READ        0x01
   #define UBC_WRITE       0x02
   #define UBC_FAULTBUSY   0x04
   
   /*
    * flags for ubc_release()
    */
   #define UBC_UNMAP       0x01
   
   /*
    * helpers for calling ubc_release()
    */
   #ifdef PMAP_CACHE_VIVT
   #define UBC_WANT_UNMAP(vp) (((vp)->v_flag & VTEXT) != 0)
   #else
   #define UBC_WANT_UNMAP(vp) FALSE
   #endif
   
   /*
    * flags for uvn_findpages().
    */
   #define UFP_ALL         0x00
   #define UFP_NOWAIT      0x01
   #define UFP_NOALLOC     0x02
   #define UFP_NOCACHE     0x04
   #define UFP_NORDONLY    0x08
   #define UFP_DIRTYONLY   0x10
   #define UFP_BACKWARD    0x20
   
   /*
    * lockflags that control the locking behavior of various functions.
    */
   #define UVM_LK_ENTER    0x00000001      /* map locked on entry */
   #define UVM_LK_EXIT     0x00000002      /* leave map locked on exit */
   
   /*
    * structures
    */
   
   struct buf;
   struct core;
   struct loadavg;
   struct mount;
   struct pglist;
   struct proc;
   struct uio;
   struct uvm_object;
   struct vm_anon;
   struct vmspace;
   struct pmap;
   struct vnode;
   struct pool;
   struct simplelock;
   struct vm_map_entry;
   struct vm_map;
   struct vm_page;
   struct vmtotal;
   
   /*
    * uvm_pctparam: parameter to be shown as percentage to user.
    */
   
   #define UVM_PCTPARAM_SHIFT      8
   #define UVM_PCTPARAM_SCALE      (1 << UVM_PCTPARAM_SHIFT)
   #define UVM_PCTPARAM_APPLY(pct, x) \
           (((x) * (pct)->pct_scaled) >> UVM_PCTPARAM_SHIFT)
   struct uvm_pctparam {
           int pct_pct;    /* percent [0, 100] */ /* should be the first member */
           int pct_scaled;
           int (*pct_check)(struct uvm_pctparam *, int);
   };
   
   /*
    * uvmexp: global data structures that are exported to parts of the kernel
    * other than the vm system.
    */
   
   struct uvmexp {
           /* vm_page constants */
           int pagesize;   /* size of a page (PAGE_SIZE): must be power of 2 */
           int pagemask;   /* page mask */
           int pageshift;  /* page shift */
   
           /* vm_page counters */
           int npages;     /* number of pages we manage */
           int free;       /* number of free pages */
           int paging;     /* number of pages in the process of being paged out */
           int wired;      /* number of wired pages */
   
           /*
            * Adding anything before this line will break binary compatibility
            * with top(1) on NetBSD 1.5.
            */
   
           int ncolors;    /* number of page color buckets: must be p-o-2 */
           int colormask;  /* color bucket mask */
   
           int zeropages;          /* number of zero'd pages */
           int reserve_pagedaemon; /* number of pages reserved for pagedaemon */
           int reserve_kernel;     /* number of pages reserved for kernel */
           int anonpages;          /* number of pages used by anon mappings */
           int filepages;          /* number of pages used by cached file data */
           int execpages;          /* number of pages used by cached exec data */
   
           /* pageout params */
           int freemin;    /* min number of free pages */
           int freetarg;   /* target number of free pages */
           int wiredmax;   /* max number of wired pages */
   
           /* swap */
           int nswapdev;   /* number of configured swap devices in system */
           int swpages;    /* number of PAGE_SIZE'ed swap pages */
           int swpgavail;  /* number of swap pages currently available */
           int swpginuse;  /* number of swap pages in use */
           int swpgonly;   /* number of swap pages in use, not also in RAM */
           int nswget;     /* number of times fault calls uvm_swap_get() */
   
           /* stat counters.  XXX: should be 64-bit counters */
           int faults;             /* page fault count */
           int traps;              /* trap count */
           int intrs;              /* interrupt count */
           int swtch;              /* context switch count */
           int softs;              /* software interrupt count */
           int syscalls;           /* system calls */
           int pageins;            /* pagein operation count */
                                   /* pageouts are in pdpageouts below */
           int swapins;            /* swapins */
           int swapouts;           /* swapouts */
           int pgswapin;           /* pages swapped in */
           int pgswapout;          /* pages swapped out */
           int forks;              /* forks */
           int forks_ppwait;       /* forks where parent waits */
           int forks_sharevm;      /* forks where vmspace is shared */
           int pga_zerohit;        /* pagealloc where zero wanted and zero
                                      was available */
           int pga_zeromiss;       /* pagealloc where zero wanted and zero
                                      not available */
           int zeroaborts;         /* number of times page zeroing was
                                      aborted */
           int colorhit;           /* pagealloc where we got optimal color */
           int colormiss;          /* pagealloc where we didn't */
   
           /* fault subcounters.  XXX: should be 64-bit counters */
           int fltnoram;   /* number of times fault was out of ram */
           int fltnoanon;  /* number of times fault was out of anons */
           int fltpgwait;  /* number of times fault had to wait on a page */
           int fltpgrele;  /* number of times fault found a released page */
           int fltrelck;   /* number of times fault relock called */
           int fltrelckok; /* number of times fault relock is a success */
           int fltanget;   /* number of times fault gets anon page */
           int fltanretry; /* number of times fault retrys an anon get */
           int fltamcopy;  /* number of times fault clears "needs copy" */
           int fltnamap;   /* number of times fault maps a neighbor anon page */
           int fltnomap;   /* number of times fault maps a neighbor obj page */
           int fltlget;    /* number of times fault does a locked pgo_get */
           int fltget;     /* number of times fault does an unlocked get */
           int flt_anon;   /* number of times fault anon (case 1a) */
           int flt_acow;   /* number of times fault anon cow (case 1b) */
           int flt_obj;    /* number of times fault is on object page (2a) */
           int flt_prcopy; /* number of times fault promotes with copy (2b) */
           int flt_przero; /* number of times fault promotes with zerofill (2b) */
   
           /* daemon counters.  XXX: should be 64-bit counters */
           int pdwoke;     /* number of times daemon woke up */
           int pdrevs;     /* number of times daemon rev'd clock hand */
           int pdswout;    /* number of times daemon called for swapout */
           int pdfreed;    /* number of pages daemon freed since boot */
           int pdscans;    /* number of pages daemon scanned since boot */
           int pdanscan;   /* number of anonymous pages scanned by daemon */
           int pdobscan;   /* number of object pages scanned by daemon */
           int pdreact;    /* number of pages daemon reactivated since boot */
           int pdbusy;     /* number of times daemon found a busy page */
           int pdpageouts; /* number of times daemon started a pageout */
           int pdpending;  /* number of times daemon got a pending pagout */
           int pddeact;    /* number of pages daemon deactivates */
           int pdreanon;   /* anon pages reactivated due to thresholds */
           int pdrefile;   /* file pages reactivated due to thresholds */
           int pdreexec;   /* executable pages reactivated due to thresholds */
   };
   
   /*
    * The following structure is 64-bit alignment safe.  New elements
    * should only be added to the end of this structure so binary
    * compatibility can be preserved.
    */
   struct uvmexp_sysctl {
           int64_t pagesize;
           int64_t pagemask;
           int64_t pageshift;
           int64_t npages;
           int64_t free;
           int64_t active;
           int64_t inactive;
           int64_t paging;
           int64_t wired;
           int64_t zeropages;
           int64_t reserve_pagedaemon;
           int64_t reserve_kernel;
           int64_t freemin;
           int64_t freetarg;
           int64_t inactarg; /* unused */
           int64_t wiredmax;
           int64_t nswapdev;
           int64_t swpages;
           int64_t swpginuse;
           int64_t swpgonly;
           int64_t nswget;
           int64_t unused1; /* used to be nanon */
           int64_t unused2; /* used to be nanonneeded */
           int64_t unused3; /* used to be nfreeanon */
           int64_t faults;
           int64_t traps;
           int64_t intrs;
           int64_t swtch;
           int64_t softs;
           int64_t syscalls;
           int64_t pageins;
           int64_t swapins;
           int64_t swapouts;
           int64_t pgswapin;
           int64_t pgswapout;
           int64_t forks;
           int64_t forks_ppwait;
           int64_t forks_sharevm;
           int64_t pga_zerohit;
           int64_t pga_zeromiss;
           int64_t zeroaborts;
           int64_t fltnoram;
           int64_t fltnoanon;
           int64_t fltpgwait;
           int64_t fltpgrele;
           int64_t fltrelck;
           int64_t fltrelckok;
           int64_t fltanget;
           int64_t fltanretry;
           int64_t fltamcopy;
           int64_t fltnamap;
           int64_t fltnomap;
           int64_t fltlget;
           int64_t fltget;
           int64_t flt_anon;
           int64_t flt_acow;
           int64_t flt_obj;
           int64_t flt_prcopy;
           int64_t flt_przero;
           int64_t pdwoke;
           int64_t pdrevs;
           int64_t pdswout;
           int64_t pdfreed;
           int64_t pdscans;
           int64_t pdanscan;
           int64_t pdobscan;
           int64_t pdreact;
           int64_t pdbusy;
           int64_t pdpageouts;
           int64_t pdpending;
           int64_t pddeact;
           int64_t anonpages;
           int64_t filepages;
           int64_t execpages;
           int64_t colorhit;
           int64_t colormiss;
           int64_t ncolors;
   };
   
   #ifdef _KERNEL
   /* we need this before including uvm_page.h on some platforms */
   extern struct uvmexp uvmexp;
   #endif
   
   /*
    * Finally, bring in standard UVM headers.
    */
   #include <sys/vmmeter.h>
   #include <sys/queue.h>
   #include <sys/lock.h>
   #include <uvm/uvm_param.h>
   #include <uvm/uvm_prot.h>
   #include <uvm/uvm_page.h>
   #include <uvm/uvm_pmap.h>
   #include <uvm/uvm_map.h>
   #include <uvm/uvm_pager.h>
   
   /*
    * Shareable process virtual address space.
    * May eventually be merged with vm_map.
    * Several fields are temporary (text, data stuff).
    */
   struct vmspace {
           struct  vm_map vm_map;  /* VM address map */
           int     vm_refcnt;      /* number of references *
                                    * note: protected by vm_map.ref_lock */
           caddr_t vm_shm;         /* SYS5 shared memory private data XXX */
   /* we copy from vm_startcopy to the end of the structure on fork */
   #define vm_startcopy vm_rssize
           segsz_t vm_rssize;      /* current resident set size in pages */
           segsz_t vm_swrss;       /* resident set size before last swap */
           segsz_t vm_tsize;       /* text size (pages) XXX */
           segsz_t vm_dsize;       /* data size (pages) XXX */
           segsz_t vm_ssize;       /* stack size (pages) */
           caddr_t vm_taddr;       /* user virtual address of text XXX */
           caddr_t vm_daddr;       /* user virtual address of data XXX */
           caddr_t vm_maxsaddr;    /* user VA at max stack growth */
           caddr_t vm_minsaddr;    /* user VA at top of stack */
   };
   #define VMSPACE_IS_KERNEL_P(vm) VM_MAP_IS_KERNEL(&(vm)->vm_map)
   
   #ifdef _KERNEL
   
   extern struct pool *uvm_aiobuf_pool;
   
   /*
    * used to keep state while iterating over the map for a core dump.
    */
   struct uvm_coredump_state {
           void *cookie;           /* opaque for the caller */
           vaddr_t start;          /* start of region */
           vaddr_t realend;        /* real end of region */
           vaddr_t end;            /* virtual end of region */
           vm_prot_t prot;         /* protection of region */
           int flags;              /* flags; see below */
   };
   
   #define UVM_COREDUMP_STACK      0x01    /* region is user stack */
   
   /*
    * the various kernel maps, owned by MD code
    */
   extern struct vm_map *exec_map;
   extern struct vm_map *kernel_map;
   extern struct vm_map *kmem_map;
   extern struct vm_map *mb_map;
   extern struct vm_map *phys_map;
   
   /*
    * macros
    */
   
   #define vm_resident_count(vm) (pmap_resident_count((vm)->vm_map.pmap))
   
   #include <sys/mallocvar.h>
   MALLOC_DECLARE(M_VMMAP);
   MALLOC_DECLARE(M_VMPMAP);
   
   /* vm_machdep.c */
   void            vmapbuf(struct buf *, vsize_t);
   void            vunmapbuf(struct buf *, vsize_t);
   #ifndef cpu_swapin
   void            cpu_swapin(struct lwp *);
   #endif
   #ifndef cpu_swapout
   void            cpu_swapout(struct lwp *);
   #endif
   
   /* uvm_aobj.c */
   struct uvm_object       *uao_create(vsize_t, int);
   void                    uao_detach(struct uvm_object *);
   void                    uao_detach_locked(struct uvm_object *);
   void                    uao_reference(struct uvm_object *);
   void                    uao_reference_locked(struct uvm_object *);
   
   /* uvm_bio.c */
   void                    ubc_init(void);
   void *                  ubc_alloc(struct uvm_object *, voff_t, vsize_t *, int,
                               int);
   void                    ubc_release(void *, int);
   void                    ubc_flush(struct uvm_object *, voff_t, voff_t);
   
   /* uvm_fault.c */
   #define uvm_fault(m, a, p) uvm_fault_internal(m, a, p, 0)
   int             uvm_fault_internal(struct vm_map *, vaddr_t, vm_prot_t, int);
                           /* handle a page fault */
   
   /* uvm_glue.c */
   #if defined(KGDB)
   void                    uvm_chgkprot(caddr_t, size_t, int);
   #endif
   void                    uvm_proc_fork(struct proc *, struct proc *, boolean_t);
   void                    uvm_lwp_fork(struct lwp *, struct lwp *,
                               void *, size_t, void (*)(void *), void *);
   int                     uvm_coredump_walkmap(struct proc *,
                               void *,
                               int (*)(struct proc *, void *,
                                       struct uvm_coredump_state *), void *);
   void                    uvm_proc_exit(struct proc *);
   void                    uvm_lwp_exit(struct lwp *);
   void                    uvm_init_limits(struct proc *);
   boolean_t               uvm_kernacc(caddr_t, size_t, int);
   __dead void             uvm_scheduler(void) __attribute__((noreturn));
   void                    uvm_swapin(struct lwp *);
   boolean_t               uvm_uarea_alloc(vaddr_t *);
   void                    uvm_uarea_drain(boolean_t);
   int                     uvm_vslock(struct vmspace *, void *, size_t, vm_prot_t);
   void                    uvm_vsunlock(struct vmspace *, void *, size_t);
   
   
   /* uvm_init.c */
   void                    uvm_init(void);
   
   /* uvm_io.c */
   int                     uvm_io(struct vm_map *, struct uio *);
   
   /* uvm_km.c */
   vaddr_t                 uvm_km_alloc(struct vm_map *, vsize_t, vsize_t,
                               uvm_flag_t);
   void                    uvm_km_free(struct vm_map *, vaddr_t, vsize_t,
                               uvm_flag_t);
   
   struct vm_map           *uvm_km_suballoc(struct vm_map *, vaddr_t *,
                               vaddr_t *, vsize_t, int, boolean_t,
                               struct vm_map_kernel *);
   vaddr_t                 uvm_km_alloc_poolpage(struct vm_map *, boolean_t);
   void                    uvm_km_free_poolpage(struct vm_map *, vaddr_t);
   vaddr_t                 uvm_km_alloc_poolpage_cache(struct vm_map *, boolean_t);
   void                    uvm_km_free_poolpage_cache(struct vm_map *, vaddr_t);
   void                    uvm_km_vacache_init(struct vm_map *,
                               const char *, size_t);
   
   /* uvm_map.c */
   int                     uvm_map(struct vm_map *, vaddr_t *, vsize_t,
                               struct uvm_object *, voff_t, vsize_t,
                               uvm_flag_t);
   int                     uvm_map_pageable(struct vm_map *, vaddr_t,
                               vaddr_t, boolean_t, int);
   int                     uvm_map_pageable_all(struct vm_map *, int, vsize_t);
   boolean_t               uvm_map_checkprot(struct vm_map *, vaddr_t,
                               vaddr_t, vm_prot_t);
   int                     uvm_map_protect(struct vm_map *, vaddr_t,
                               vaddr_t, vm_prot_t, boolean_t);
   struct vmspace          *uvmspace_alloc(vaddr_t, vaddr_t);
   void                    uvmspace_init(struct vmspace *, struct pmap *,
                               vaddr_t, vaddr_t);
   void                    uvmspace_exec(struct lwp *, vaddr_t, vaddr_t);
   struct vmspace          *uvmspace_fork(struct vmspace *);
   void                    uvmspace_addref(struct vmspace *);
   void                    uvmspace_free(struct vmspace *);
   void                    uvmspace_share(struct proc *, struct proc *);
   void                    uvmspace_unshare(struct lwp *);
   
   
   /* uvm_meter.c */
   void                    uvm_meter(void);
   int                     uvm_sysctl(int *, u_int, void *, size_t *,
                               void *, size_t, struct proc *);
   int                     uvm_pctparam_check(struct uvm_pctparam *, int);
   void                    uvm_pctparam_set(struct uvm_pctparam *, int);
   int                     uvm_pctparam_get(struct uvm_pctparam *);
   void                    uvm_pctparam_init(struct uvm_pctparam *, int,
                               int (*)(struct uvm_pctparam *, int));
   int                     uvm_pctparam_createsysctlnode(struct uvm_pctparam *,
                               const char *, const char *);
   
   /* uvm_mmap.c */
   int                     uvm_mmap(struct vm_map *, vaddr_t *, vsize_t,
                               vm_prot_t, vm_prot_t, int,
                               void *, voff_t, vsize_t);
   vaddr_t                 uvm_default_mapaddr(struct proc *, vaddr_t, vsize_t);
   
   /* uvm_mremap.c */
   int                     uvm_mremap(struct vm_map *, vaddr_t, vsize_t,
                               struct vm_map *, vaddr_t *, vsize_t,
                               struct proc *, int);
   #define UVM_MREMAP_FIXED        1
   
   /* uvm_object.c */
   int                     uobj_wirepages(struct uvm_object *uobj, off_t start,
                               off_t end);
   void                    uobj_unwirepages(struct uvm_object *uobj, off_t start,
                               off_t end);
   
   /* uvm_page.c */
   struct vm_page          *uvm_pagealloc_strat(struct uvm_object *,
                               voff_t, struct vm_anon *, int, int, int);
   #define uvm_pagealloc(obj, off, anon, flags) \
               uvm_pagealloc_strat((obj), (off), (anon), (flags), \
                                   UVM_PGA_STRAT_NORMAL, 0)
   void                    uvm_pagereplace(struct vm_page *,
                               struct vm_page *);
   void                    uvm_pagerealloc(struct vm_page *,
                               struct uvm_object *, voff_t);
   /* Actually, uvm_page_physload takes PF#s which need their own type */
   void                    uvm_page_physload(paddr_t, paddr_t, paddr_t,
                               paddr_t, int);
   void                    uvm_setpagesize(void);
   
   /* uvm_pager.c */
   void                    uvm_aio_biodone1(struct buf *);
   void                    uvm_aio_biodone(struct buf *);
   void                    uvm_aio_aiodone(struct buf *);
   
   /* uvm_pdaemon.c */
   void                    uvm_pageout(void *);
   void                    uvm_aiodone_daemon(void *);
   void                    uvm_estimatepageable(int *, int *);
   
   /* uvm_pglist.c */
   int                     uvm_pglistalloc(psize_t, paddr_t, paddr_t,
                               paddr_t, paddr_t, struct pglist *, int, int);
   void                    uvm_pglistfree(struct pglist *);
   
   /* uvm_swap.c */
   void                    uvm_swap_init(void);
   
   /* uvm_unix.c */
   int                     uvm_grow(struct proc *, vaddr_t);
   
   /* uvm_user.c */
   void                    uvm_deallocate(struct vm_map *, vaddr_t, vsize_t);
   
   /* uvm_vnode.c */
   void                    uvm_vnp_setsize(struct vnode *, voff_t);
   void                    uvm_vnp_sync(struct mount *);
   struct uvm_object       *uvn_attach(void *, vm_prot_t);
   int                     uvn_findpages(struct uvm_object *, voff_t,
                               int *, struct vm_page **, int);
   void                    uvm_vnp_zerorange(struct vnode *, off_t, size_t);
   boolean_t               uvn_text_p(struct uvm_object *);
   boolean_t               uvn_clean_p(struct uvm_object *);
   boolean_t               uvn_needs_writefault_p(struct uvm_object *);
   
   /* kern_malloc.c */
   void                    kmeminit_nkmempages(void);
   void                    kmeminit(void);
   extern int              nkmempages;
   
   #endif /* _KERNEL */
   
   #endif /* _UVM_UVM_EXTERN_H_ */

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