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

     /*      $OpenBSD: uvm.h,v 1.71 2022/10/07 05:01:44 deraadt Exp $        */
     /*      $NetBSD: uvm.h,v 1.24 2000/11/27 08:40:02 chs 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.
     *
     * 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.h,v 1.1.2.14 1998/02/02 20:07:19 chuck Exp
     */
    
    #ifndef _UVM_UVM_H_
    #define _UVM_UVM_H_
    
    #include <uvm/uvm_extern.h>
    #include <uvm/uvm_amap.h>
    #include <uvm/uvm_aobj.h>
    #include <uvm/uvm_fault.h>
    #include <uvm/uvm_glue.h>
    #include <uvm/uvm_km.h>
    #include <uvm/uvm_swap.h>
    
    #include <uvm/uvm_pmemrange.h>
    
    /*
     * uvm structure (vm global state: collected in one structure for ease
     * of reference...)
     *
     *  Locks used to protect struct members in this file:
     *      Q       uvm.pageqlock
     */
    struct uvm {
            /* vm_page related parameters */
    
            /* vm_page queues */
            struct pglist page_active;      /* [Q] allocated pages, in use */
            struct pglist page_inactive;    /* [Q] pages inactive (reclaim/free) */
            /* Lock order: pageqlock, then fpageqlock. */
            struct mutex pageqlock;         /* [] lock for active/inactive page q */
            struct mutex fpageqlock;        /* [] lock for free page q  + pdaemon */
            boolean_t page_init_done;       /* TRUE if uvm_page_init() finished */
            struct uvm_pmr_control pmr_control; /* pmemrange data */
    
                    /* page daemon trigger */
            int pagedaemon;                 /* daemon sleeps on this */
            struct proc *pagedaemon_proc;   /* daemon's pid */
    
                    /* aiodone daemon trigger */
            int aiodoned;                   /* daemon sleeps on this */
            struct proc *aiodoned_proc;     /* daemon's pid */
            struct mutex aiodoned_lock;
    
            /* static kernel map entry pool */
            SLIST_HEAD(, vm_map_entry) kentry_free; /* free page pool */
    
            /* aio_done is locked by uvm.aiodoned_lock. */
            TAILQ_HEAD(, buf) aio_done;             /* done async i/o reqs */
    
            /* kernel object: to support anonymous pageable kernel memory */
            struct uvm_object *kernel_object;
    };
    
    /*
     * vm_map_entry etype bits:
     */
    #define UVM_ET_OBJ              0x0001  /* it is a uvm_object */
    #define UVM_ET_SUBMAP           0x0002  /* it is a vm_map submap */
    #define UVM_ET_COPYONWRITE      0x0004  /* copy_on_write */
    #define UVM_ET_NEEDSCOPY        0x0008  /* needs_copy */
    #define UVM_ET_HOLE             0x0010  /* no backend */
    #define UVM_ET_NOFAULT          0x0020  /* don't fault */
    #define UVM_ET_STACK            0x0040  /* this is a stack */
    #define UVM_ET_WC               0x0080  /* write combining */
    #define UVM_ET_CONCEAL          0x0100  /* omit from dumps */
    #define UVM_ET_SYSCALL          0x0200  /* syscall text segment */
    #define UVM_ET_IMMUTABLE        0x0400  /* entry may not be changed */
    #define UVM_ET_FREEMAPPED       0x8000  /* map entry is on free list (DEBUG) */
    
    #define UVM_ET_ISOBJ(E)         (((E)->etype & UVM_ET_OBJ) != 0)
    #define UVM_ET_ISSUBMAP(E)      (((E)->etype & UVM_ET_SUBMAP) != 0)
   #define UVM_ET_ISCOPYONWRITE(E) (((E)->etype & UVM_ET_COPYONWRITE) != 0)
   #define UVM_ET_ISNEEDSCOPY(E)   (((E)->etype & UVM_ET_NEEDSCOPY) != 0)
   #define UVM_ET_ISHOLE(E)        (((E)->etype & UVM_ET_HOLE) != 0)
   #define UVM_ET_ISNOFAULT(E)     (((E)->etype & UVM_ET_NOFAULT) != 0)
   #define UVM_ET_ISSTACK(E)       (((E)->etype & UVM_ET_STACK) != 0)
   #define UVM_ET_ISWC(E)          (((E)->etype & UVM_ET_WC) != 0)
   #define UVM_ET_ISCONCEAL(E)     (((E)->etype & UVM_ET_CONCEAL) != 0)
   
   #ifdef _KERNEL
   
   /*
    * holds all the internal UVM data
    */
   extern struct uvm uvm;
   
   /*
    * UVM_PAGE_OWN: track page ownership (only if UVM_PAGE_TRKOWN)
    */
   
   #if defined(UVM_PAGE_TRKOWN)
   #define UVM_PAGE_OWN(PG, TAG) uvm_page_own(PG, TAG)
   #else
   #define UVM_PAGE_OWN(PG, TAG) /* nothing */
   #endif /* UVM_PAGE_TRKOWN */
   
   /*
    * uvm_map internal functions.
    * Used by uvm_map address selectors.
    */
   struct vm_map_entry     *uvm_map_entrybyaddr(struct uvm_map_addr *, vaddr_t);
   int                      uvm_map_isavail(struct vm_map *,
                               struct uvm_addr_state *,
                               struct vm_map_entry **, struct vm_map_entry**,
                               vaddr_t, vsize_t);
   struct uvm_addr_state   *uvm_map_uaddr(struct vm_map *, vaddr_t);
   struct uvm_addr_state   *uvm_map_uaddr_e(struct vm_map *, struct vm_map_entry *);
   
   #define VMMAP_FREE_START(_entry)        ((_entry)->end + (_entry)->guard)
   #define VMMAP_FREE_END(_entry)          ((_entry)->end + (_entry)->guard + \
                                               (_entry)->fspace)
   
   #endif /* _KERNEL */
   
   #endif /* _UVM_UVM_H_ */

Cache object: 2b6e6de9fbcdcd3f43c23d7b4bc07a9f