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Annotation of src/sys/uvm/uvm.h, Revision 1.22

1.22    ! thorpej     1: /*     $NetBSD: uvm.h,v 1.21 2000/04/24 17:12:00 thorpej Exp $ */
1.3       mrg         2:
1.1       mrg         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.
1.3       mrg        33:  *
                     34:  * from: Id: uvm.h,v 1.1.2.14 1998/02/02 20:07:19 chuck Exp
1.1       mrg        35:  */
                     36:
1.4       perry      37: #ifndef _UVM_UVM_H_
                     38: #define _UVM_UVM_H_
                     39:
1.9       pk         40: #if defined(_KERNEL) && !defined(_LKM)
1.8       thorpej    41: #include "opt_lockdebug.h"
1.12      thorpej    42: #include "opt_multiprocessor.h"
1.5       mrg        43: #include "opt_uvmhist.h"
1.9       pk         44: #endif
1.5       mrg        45:
1.1       mrg        46: #include <uvm/uvm_extern.h>
                     47:
                     48: #include <uvm/uvm_stat.h>
                     49:
                     50: /*
                     51:  * pull in prototypes
                     52:  */
                     53:
                     54: #include <uvm/uvm_amap.h>
                     55: #include <uvm/uvm_aobj.h>
                     56: #include <uvm/uvm_fault.h>
                     57: #include <uvm/uvm_glue.h>
                     58: #include <uvm/uvm_km.h>
                     59: #include <uvm/uvm_loan.h>
                     60: #include <uvm/uvm_map.h>
                     61: #include <uvm/uvm_object.h>
                     62: #include <uvm/uvm_page.h>
                     63: #include <uvm/uvm_pager.h>
                     64: #include <uvm/uvm_pdaemon.h>
                     65: #include <uvm/uvm_swap.h>
                     66:
                     67: /*
1.10      thorpej    68:  * pull in VM_NFREELIST
                     69:  */
                     70: #include <machine/vmparam.h>
                     71:
                     72: /*
1.1       mrg        73:  * uvm structure (vm global state: collected in one structure for ease
                     74:  * of reference...)
                     75:  */
                     76:
                     77: struct uvm {
                     78:        /* vm_page related parameters */
                     79:                /* vm_page queues */
1.21      thorpej    80:        struct pgfreelist page_free[VM_NFREELIST]; /* unallocated pages */
1.1       mrg        81:        struct pglist page_active;      /* allocated pages, in use */
                     82:        struct pglist page_inactive_swp;/* pages inactive (reclaim or free) */
                     83:        struct pglist page_inactive_obj;/* pages inactive (reclaim or free) */
                     84:        simple_lock_data_t pageqlock;   /* lock for active/inactive page q */
                     85:        simple_lock_data_t fpageqlock;  /* lock for free page q */
1.19      thorpej    86:        boolean_t page_init_done;       /* TRUE if uvm_page_init() finished */
1.21      thorpej    87:        boolean_t page_idle_zero;       /* TRUE if we should try to zero
                     88:                                           pages in the idle loop */
1.1       mrg        89:                /* page daemon trigger */
                     90:        int pagedaemon;                 /* daemon sleeps on this */
                     91:        struct proc *pagedaemon_proc;   /* daemon's pid */
                     92:        simple_lock_data_t pagedaemon_lock;
                     93:                /* page hash */
                     94:        struct pglist *page_hash;       /* page hash table (vp/off->page) */
                     95:        int page_nhash;                 /* number of buckets */
                     96:        int page_hashmask;              /* hash mask */
                     97:        simple_lock_data_t hashlock;    /* lock on page_hash array */
1.15      chs        98:
1.1       mrg        99:        /* anon stuff */
                    100:        struct vm_anon *afree;          /* anon free list */
                    101:        simple_lock_data_t afreelock;   /* lock on anon free list */
                    102:
                    103:        /* static kernel map entry pool */
                    104:        vm_map_entry_t kentry_free;     /* free page pool */
                    105:        simple_lock_data_t kentry_lock;
                    106:
                    107:        /* aio_done is locked by uvm.pagedaemon_lock and splbio! */
                    108:        struct uvm_aiohead aio_done;    /* done async i/o reqs */
                    109:
                    110:        /* pager VM area bounds */
1.11      eeh       111:        vaddr_t pager_sva;              /* start of pager VA area */
                    112:        vaddr_t pager_eva;              /* end of pager VA area */
1.15      chs       113:
                    114:        /* swap-related items */
                    115:        simple_lock_data_t swap_data_lock;
1.1       mrg       116:
                    117:        /* kernel object: to support anonymous pageable kernel memory */
                    118:        struct uvm_object *kernel_object;
                    119: };
                    120:
                    121: /*
                    122:  * vm_map_entry etype bits:
                    123:  */
                    124:
                    125: #define UVM_ET_OBJ             0x01    /* it is a uvm_object */
1.13      chuck     126: #define UVM_ET_SUBMAP          0x02    /* it is a vm_map submap */
                    127: #define UVM_ET_COPYONWRITE     0x04    /* copy_on_write */
                    128: #define UVM_ET_NEEDSCOPY       0x08    /* needs_copy */
1.1       mrg       129:
                    130: #define UVM_ET_ISOBJ(E)                (((E)->etype & UVM_ET_OBJ) != 0)
                    131: #define UVM_ET_ISSUBMAP(E)     (((E)->etype & UVM_ET_SUBMAP) != 0)
                    132: #define UVM_ET_ISCOPYONWRITE(E)        (((E)->etype & UVM_ET_COPYONWRITE) != 0)
                    133: #define UVM_ET_ISNEEDSCOPY(E)  (((E)->etype & UVM_ET_NEEDSCOPY) != 0)
                    134:
                    135: /*
                    136:  * macros
                    137:  */
                    138:
1.16      thorpej   139: #ifdef _KERNEL
1.20      chs       140:
                    141: extern struct uvm uvm;
                    142:
                    143: /*
                    144:  * historys
                    145:  */
                    146:
                    147: UVMHIST_DECL(maphist);
                    148: UVMHIST_DECL(pdhist);
1.16      thorpej   149:
1.1       mrg       150: /*
1.22    ! thorpej   151:  * UVM_UNLOCK_AND_WAIT: atomic unlock+wait... wrapper around the
        !           152:  * interlocked tsleep() function.
1.1       mrg       153:  */
                    154:
1.22    ! thorpej   155: #define        UVM_UNLOCK_AND_WAIT(event, slock, intr, msg, timo)              \
        !           156: do {                                                                   \
        !           157:        (void) ltsleep(event, PVM | PNORELOCK | (intr ? PCATCH : 0),    \
        !           158:            msg, timo, slock);                                          \
        !           159: } while (0)
1.1       mrg       160:
                    161: /*
                    162:  * UVM_PAGE_OWN: track page ownership (only if UVM_PAGE_TRKOWN)
                    163:  */
                    164:
                    165: #if defined(UVM_PAGE_TRKOWN)
                    166: #define UVM_PAGE_OWN(PG, TAG) uvm_page_own(PG, TAG)
1.16      thorpej   167: #else
1.1       mrg       168: #define UVM_PAGE_OWN(PG, TAG) /* nothing */
                    169: #endif /* UVM_PAGE_TRKOWN */
                    170:
                    171: /*
                    172:  * pull in inlines
                    173:  */
                    174:
                    175: #include <uvm/uvm_amap_i.h>
                    176: #include <uvm/uvm_fault_i.h>
                    177: #include <uvm/uvm_map_i.h>
                    178: #include <uvm/uvm_page_i.h>
                    179: #include <uvm/uvm_pager_i.h>
1.16      thorpej   180:
                    181: #endif /* _KERNEL */
1.4       perry     182:
                    183: #endif /* _UVM_UVM_H_ */

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