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uvm_fault.h revision 1.2 
      1 /*	$NetBSD: uvm_fault.h,v 1.2 1998/02/06 22:31:47 thorpej Exp $	*/
      2 
      3 /*
      4  * XXXCDC: "ROUGH DRAFT" QUALITY UVM PRE-RELEASE FILE!
      5  *	   >>>USE AT YOUR OWN RISK, WORK IS NOT FINISHED<<<
      6  */
      7 /*
      8  *
      9  * Copyright (c) 1997 Charles D. Cranor and Washington University.
     10  * All rights reserved.
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions and the following disclaimer.
     17  * 2. Redistributions in binary form must reproduce the above copyright
     18  *    notice, this list of conditions and the following disclaimer in the
     19  *    documentation and/or other materials provided with the distribution.
     20  * 3. All advertising materials mentioning features or use of this software
     21  *    must display the following acknowledgement:
     22  *      This product includes software developed by Charles D. Cranor and
     23  *      Washington University.
     24  * 4. The name of the author may not be used to endorse or promote products
     25  *    derived from this software without specific prior written permission.
     26  *
     27  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     28  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     29  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     30  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     31  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     32  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     33  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     34  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     35  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     36  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 /*
     40  * fault types
     41  */
     42 
     43 #define VM_FAULT_INVALID ((vm_fault_t) 0x0)	/* invalid mapping */
     44 #define VM_FAULT_PROTECT ((vm_fault_t) 0x1)	/* protection */
     45 #define VM_FAULT_WIRE	 ((vm_fault_t) 0x2)	/* wire mapping */
     46 
     47 /*
     48  * fault data structures
     49  */
     50 
     51 /*
     52  * uvm_faultinfo: to load one of these fill in all orig_* fields and
     53  * then call uvmfault_lookup on it.
     54  */
     55 
     56 
     57 struct uvm_faultinfo {
     58   vm_map_t orig_map;		/* original map (IN) */
     59   vm_offset_t orig_rvaddr;	/* original rounded virtual address (IN) */
     60   vm_size_t orig_size;		/* original size of interest (IN) */
     61   vm_offset_t rvaddr;		/* rounded virtual address */
     62   vm_map_t parent_map;		/* parent map */
     63   unsigned int parentv;		/* parent map version number */
     64   vm_map_t map;			/* map */
     65   unsigned int mapv;		/* map version number */
     66   vm_map_entry_t entry;		/* map entry of rvaddr */
     67   vm_size_t size;		/* size of interest */
     68 };
     69 
     70 /*
     71  * fault prototypes
     72  */
     73 
     74 
     75 int uvmfault_anonget __P((struct uvm_faultinfo *, struct vm_amap *,
     76                           struct vm_anon *));
     77 static boolean_t uvmfault_lookup __P((struct uvm_faultinfo *, boolean_t));
     78 static boolean_t uvmfault_relock __P((struct uvm_faultinfo *));
     79 static void uvmfault_unlockall __P((struct uvm_faultinfo *, struct vm_amap *,
     80 			            struct uvm_object *, struct vm_anon *));
     81 static void uvmfault_unlockmaps __P((struct uvm_faultinfo *, boolean_t));
     82 
     83 int uvm_fault_wire __P((vm_map_t, vm_offset_t, vm_offset_t));
     84 void uvm_fault_unwire __P((struct pmap *, vm_offset_t, vm_offset_t));
     85 
     86