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uvm_fault.h revision 1.6 
      1 /*	$NetBSD: uvm_fault.h,v 1.6 1998/08/13 02:11:00 eeh 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  * from: Id: uvm_fault.h,v 1.1.2.2 1997/12/08 16:07:12 chuck Exp
     39  */
     40 
     41 #ifndef _UVM_UVM_FAULT_H_
     42 #define _UVM_UVM_FAULT_H_
     43 
     44 /*
     45  * fault types
     46  */
     47 
     48 #define VM_FAULT_INVALID ((vm_fault_t) 0x0)	/* invalid mapping */
     49 #define VM_FAULT_PROTECT ((vm_fault_t) 0x1)	/* protection */
     50 #define VM_FAULT_WIRE	 ((vm_fault_t) 0x2)	/* wire mapping */
     51 
     52 /*
     53  * fault data structures
     54  */
     55 
     56 /*
     57  * uvm_faultinfo: to load one of these fill in all orig_* fields and
     58  * then call uvmfault_lookup on it.
     59  */
     60 
     61 
     62 struct uvm_faultinfo {
     63 	vm_map_t orig_map;		/* original map (IN) */
     64 	vaddr_t orig_rvaddr;	/* original rounded VA (IN) */
     65 	vsize_t orig_size;		/* original size of interest (IN) */
     66 	vaddr_t rvaddr;		/* rounded virtual address */
     67 	vm_map_t parent_map;		/* parent map */
     68 	unsigned int parentv;		/* parent map version number */
     69 	vm_map_t map;			/* map */
     70 	unsigned int mapv;		/* map version number */
     71 	vm_map_entry_t entry;		/* map entry of rvaddr */
     72 	vsize_t size;			/* size of interest */
     73 };
     74 
     75 /*
     76  * fault prototypes
     77  */
     78 
     79 
     80 int uvmfault_anonget __P((struct uvm_faultinfo *, struct vm_amap *,
     81 													struct vm_anon *));
     82 static boolean_t uvmfault_lookup __P((struct uvm_faultinfo *, boolean_t));
     83 static boolean_t uvmfault_relock __P((struct uvm_faultinfo *));
     84 static void uvmfault_unlockall __P((struct uvm_faultinfo *, struct vm_amap *,
     85 			            struct uvm_object *, struct vm_anon *));
     86 static void uvmfault_unlockmaps __P((struct uvm_faultinfo *, boolean_t));
     87 
     88 int uvm_fault_wire __P((vm_map_t, vaddr_t, vaddr_t));
     89 void uvm_fault_unwire __P((struct pmap *, vaddr_t, vaddr_t));
     90 
     91 #endif /* _UVM_UVM_FAULT_H_ */
     92