FreeBSD/Linux Kernel Cross Reference
sys/uvm/uvm_fault.h

     /*      $OpenBSD: uvm_fault.h,v 1.16 2020/11/06 11:52:39 mpi Exp $      */
     /*      $NetBSD: uvm_fault.h,v 1.14 2000/06/26 14:21:17 mrg Exp $       */
     
     /*
      * 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.
     *
     * 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.
     *
     * from: Id: uvm_fault.h,v 1.1.2.2 1997/12/08 16:07:12 chuck Exp
     */
    
    #ifndef _UVM_UVM_FAULT_H_
    #define _UVM_UVM_FAULT_H_
    
    /*
     * 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;              /* IN: original map */
            vaddr_t orig_rvaddr;            /* IN: original rounded VA */
            vsize_t orig_size;              /* IN: original size of interest */
            vm_map_t map;                   /* map (could be a submap) */
            unsigned int mapv;              /* map's version number */
            vm_map_entry_t entry;           /* map entry (from 'map') */
            vsize_t size;                   /* size of interest */
    };
    
    #ifdef _KERNEL
    
    /*
     * fault prototypes
     */
    
    void            uvmfault_init(void);
    
    boolean_t       uvmfault_lookup(struct uvm_faultinfo *, boolean_t);
    boolean_t       uvmfault_relock(struct uvm_faultinfo *);
    void            uvmfault_unlockall(struct uvm_faultinfo *, struct vm_amap *,
                        struct uvm_object *);
    int             uvmfault_anonget(struct uvm_faultinfo *, struct vm_amap *,
                        struct vm_anon *);
    
    int             uvm_fault_wire(vm_map_t, vaddr_t, vaddr_t, vm_prot_t);
    void            uvm_fault_unwire(vm_map_t, vaddr_t, vaddr_t);
    void            uvm_fault_unwire_locked(vm_map_t, vaddr_t, vaddr_t);
    
    #endif /* _KERNEL */
    
    #endif /* _UVM_UVM_FAULT_H_ */

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