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uvm_fault.h revision 1.17 
      1 /*	$NetBSD: uvm_fault.h,v 1.17 2004/03/24 07:55:01 junyoung Exp $	*/
      2 
      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.
     33  *
     34  * from: Id: uvm_fault.h,v 1.1.2.2 1997/12/08 16:07:12 chuck Exp
     35  */
     36 
     37 #ifndef _UVM_UVM_FAULT_H_
     38 #define _UVM_UVM_FAULT_H_
     39 
     40 /*
     41  * fault types
     42  */
     43 
     44 #define VM_FAULT_INVALID ((vm_fault_t) 0x0)	/* invalid mapping */
     45 #define VM_FAULT_PROTECT ((vm_fault_t) 0x1)	/* protection */
     46 #define VM_FAULT_WIRE	 ((vm_fault_t) 0x2)	/* wire mapping */
     47 #define VM_FAULT_WIREMAX ((vm_fault_t) 0x3)	/* wire, allow maxprot */
     48 
     49 /*
     50  * fault data structures
     51  */
     52 
     53 /*
     54  * uvm_faultinfo: to load one of these fill in all orig_* fields and
     55  * then call uvmfault_lookup on it.
     56  */
     57 
     58 
     59 struct uvm_faultinfo {
     60 	struct vm_map *orig_map;		/* IN: original map */
     61 	vaddr_t orig_rvaddr;		/* IN: original rounded VA */
     62 	vsize_t orig_size;		/* IN: original size of interest */
     63 	struct vm_map *map;			/* map (could be a submap) */
     64 	unsigned int mapv;		/* map's version number */
     65 	struct vm_map_entry *entry;		/* map entry (from 'map') */
     66 	vsize_t size;			/* size of interest */
     67 };
     68 
     69 #ifdef _KERNEL
     70 
     71 /*
     72  * fault prototypes
     73  */
     74 
     75 int uvmfault_anonget(struct uvm_faultinfo *, struct vm_amap *,
     76 		     struct vm_anon *);
     77 
     78 int uvm_fault_wire(struct vm_map *, vaddr_t, vaddr_t, vm_fault_t,
     79 		   vm_prot_t);
     80 void uvm_fault_unwire(struct vm_map *, vaddr_t, vaddr_t);
     81 void uvm_fault_unwire_locked(struct vm_map *, vaddr_t, vaddr_t);
     82 
     83 #endif /* _KERNEL */
     84 
     85 #endif /* _UVM_UVM_FAULT_H_ */
     86