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uvm_fault.h revision 1.10 
      1 /*	$NetBSD: uvm_fault.h,v 1.10 1999/05/28 20:49:51 thorpej 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 
     48 /*
     49  * fault data structures
     50  */
     51 
     52 /*
     53  * uvm_faultinfo: to load one of these fill in all orig_* fields and
     54  * then call uvmfault_lookup on it.
     55  */
     56 
     57 
     58 struct uvm_faultinfo {
     59 	vm_map_t orig_map;		/* IN: original map */
     60 	vaddr_t orig_rvaddr;		/* IN: original rounded VA */
     61 	vsize_t orig_size;		/* IN: original size of interest */
     62 	vm_map_t map;			/* map (could be a submap) */
     63 	unsigned int mapv;		/* map's version number */
     64 	vm_map_entry_t entry;		/* map entry (from 'map') */
     65 	vsize_t size;			/* size of interest */
     66 };
     67 
     68 /*
     69  * fault prototypes
     70  */
     71 
     72 
     73 int uvmfault_anonget __P((struct uvm_faultinfo *, struct vm_amap *,
     74 													struct vm_anon *));
     75 static boolean_t uvmfault_lookup __P((struct uvm_faultinfo *, boolean_t));
     76 static boolean_t uvmfault_relock __P((struct uvm_faultinfo *));
     77 static void uvmfault_unlockall __P((struct uvm_faultinfo *, struct vm_amap *,
     78 			            struct uvm_object *, struct vm_anon *));
     79 static void uvmfault_unlockmaps __P((struct uvm_faultinfo *, boolean_t));
     80 
     81 int uvm_fault_wire __P((vm_map_t, vaddr_t, vaddr_t, vm_prot_t));
     82 void uvm_fault_unwire __P((vm_map_t, vaddr_t, vaddr_t));
     83 
     84 #endif /* _UVM_UVM_FAULT_H_ */
     85