xref: /src/sys/uvm/uvm_fault.h

/*	$Id: uvm_fault.h,v 1.1.1.1 1998/02/05 06:25:10 mrg Exp $	*/

/*
 * XXXCDC: "ROUGH DRAFT" QUALITY UVM PRE-RELEASE FILE!
 *	   >>>USE AT YOUR OWN RISK, WORK IS NOT FINISHED<<<
 */
/*
 *
 * Copyright (c) 1997 Charles D. Cranor and Washington University.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Charles D. Cranor and
 *      Washington University.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * fault types
 */

#define VM_FAULT_INVALID ((vm_fault_t) 0x0)	/* invalid mapping */
#define VM_FAULT_PROTECT ((vm_fault_t) 0x1)	/* protection */
#define VM_FAULT_WIRE	 ((vm_fault_t) 0x2)	/* wire mapping */

/*
 * fault data structures
 */

/*
 * uvm_faultinfo: to load one of these fill in all orig_* fields and
 * then call uvmfault_lookup on it.
 */


struct uvm_faultinfo {
  vm_map_t orig_map;		/* original map (IN) */
  vm_offset_t orig_rvaddr;	/* original rounded virtual address (IN) */
  vm_size_t orig_size;		/* original size of interest (IN) */
  vm_offset_t rvaddr;		/* rounded virtual address */
  vm_map_t parent_map;		/* parent map */
  unsigned int parentv;		/* parent map version number */
  vm_map_t map;			/* map */
  unsigned int mapv;		/* map version number */
  vm_map_entry_t entry;		/* map entry of rvaddr */
  vm_size_t size;		/* size of interest */
};

/*
 * fault prototypes
 */


int uvmfault_anonget __P((struct uvm_faultinfo *, struct vm_amap *,
                          struct vm_anon *));
static boolean_t uvmfault_lookup __P((struct uvm_faultinfo *, boolean_t));
static boolean_t uvmfault_relock __P((struct uvm_faultinfo *));
static void uvmfault_unlockall __P((struct uvm_faultinfo *, struct vm_amap *,
			            struct uvm_object *, struct vm_anon *));
static void uvmfault_unlockmaps __P((struct uvm_faultinfo *, boolean_t));

int uvm_fault_wire __P((vm_map_t, vm_offset_t, vm_offset_t));
void uvm_fault_unwire __P((struct pmap *, vm_offset_t, vm_offset_t));