FreeBSD/Linux Kernel Cross Reference
sys/vm/vm_fault.h

     /* 
      * Mach Operating System
      * Copyright (c) 1993-1987 Carnegie Mellon University
      * All Rights Reserved.
      * 
      * Permission to use, copy, modify and distribute this software and its
      * documentation is hereby granted, provided that both the copyright
      * notice and this permission notice appear in all copies of the
      * software, derivative works or modified versions, and any portions
     * thereof, and that both notices appear in supporting documentation.
     * 
     * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
     * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     * 
     * Carnegie Mellon requests users of this software to return to
     * 
     *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
     *  School of Computer Science
     *  Carnegie Mellon University
     *  Pittsburgh PA 15213-3890
     * 
     * any improvements or extensions that they make and grant Carnegie Mellon
     * the rights to redistribute these changes.
     */
    /*
     * HISTORY
     * $Log:        vm_fault.h,v $
     * Revision 2.7  93/11/17  18:53:57  dbg
     *      Added vm_fault_noreturn.
     *      [93/10/21            dbg]
     * 
     *      Use no_return type for continuations.
     *      [93/05/04            dbg]
     * 
     *      Added ANSI function prototypes.
     *      [92/12/30            dbg]
     * 
     * Revision 2.6  91/05/18  14:40:15  rpd
     *      Added VM_FAULT_FICTITIOUS_SHORTAGE.
     *      [91/03/29            rpd]
     * 
     * Revision 2.5  91/05/14  17:48:59  mrt
     *      Correcting copyright
     * 
     * Revision 2.4  91/03/16  15:05:03  rpd
     *      Added vm_fault_init.
     *      [91/02/16            rpd]
     * 
     * Revision 2.3  91/02/05  17:58:12  mrt
     *      Changed to new Mach copyright
     *      [91/02/01  16:32:04  mrt]
     * 
     * Revision 2.2  90/02/22  20:05:32  dbg
     *      Add vm_fault_copy(), vm_fault_cleanup().  Remove
     *      vm_fault_copy_entry().
     *      [90/01/25            dbg]
     * 
     * Revision 2.1  89/08/03  16:44:57  rwd
     * Created.
     * 
     * Revision 2.6  89/04/18  21:25:22  mwyoung
     *      Reset history.
     *      [89/04/18            mwyoung]
     * 
     */
    /*
     *      File:   vm/vm_fault.h
     *
     *      Page fault handling module declarations.
     */
    
    #ifndef _VM_VM_FAULT_H_
    #define _VM_VM_FAULT_H_
    
    #include <mach/kern_return.h>
    #include <mach/vm_prot.h>
    #include <mach/machine/vm_types.h>
    #include <kern/kern_types.h>
    #include <vm/vm_map.h>
    #include <vm/vm_object.h>
    #include <vm/vm_page.h>
    
    
    /*
     *      Page fault handling based on vm_object only.
     */
    
    typedef kern_return_t   vm_fault_return_t;
    #define VM_FAULT_SUCCESS                0
    #define VM_FAULT_RETRY                  1
    #define VM_FAULT_INTERRUPTED            2
    #define VM_FAULT_MEMORY_SHORTAGE        3
    #define VM_FAULT_FICTITIOUS_SHORTAGE    4
    #define VM_FAULT_MEMORY_ERROR           5
    
    extern void vm_fault_init(void);
    
    extern vm_fault_return_t vm_fault_page(
           vm_object_t     first_object,
           vm_offset_t     first_offset,
           vm_prot_t       fault_type,
           boolean_t       must_be_resident,
           boolean_t       interruptible,
           vm_prot_t       *protection,    /* in/out */
           vm_page_t       *result_page,   /* out */
           vm_page_t       *top_page,      /* out */
           boolean_t       resume,
           continuation_t  continuation);
   
   extern void             vm_fault_cleanup(
           vm_object_t     object,
           vm_page_t       top_page);
   
   /*
    *      Page fault handling based on vm_map (or entries therein)
    */
   
   extern kern_return_t    vm_fault(
           vm_map_t        map,
           vm_offset_t     vaddr,
           vm_prot_t       fault_type,
           boolean_t       change_wiring,
           boolean_t       resume,
           no_return       (*continuation)(kern_return_t));
   
   extern void             vm_fault_wire(
           vm_map_t        map,
           vm_map_entry_t  entry);
   
   extern void             vm_fault_unwire(
           vm_map_t        map,
           vm_map_entry_t  entry);
   
   extern kern_return_t    vm_fault_copy(
           vm_object_t     src_object,
           vm_offset_t     src_offset,
           vm_size_t       *src_size,              /* in/out */
           vm_object_t     dst_object,
           vm_offset_t     dst_offset,
           vm_map_t        dst_map,
           vm_map_version_t *dst_version,
           boolean_t       interruptible);         /* Copy pages from
                                                    * one object to another
                                                    */
   /*
    *      Continuation routine in fault sequence.
    */
   extern no_return vm_fault_continue(void);
   
   /*
    *      Version of vm_fault to call when we want to
    *      make it clear that it will not return.
    */
   #define vm_fault_noreturn(m,v,ft,cw,r,c)                                \
           ((*(no_return (*)(vm_map_t, vm_offset_t, vm_prot_t,             \
                             boolean_t, boolean_t,                         \
                             no_return (*)(kern_return_t))) vm_fault       \
             )((m),(v),(ft),(cw),(r),(c)) )
   
   #endif  /* _VM_VM_FAULT_H_ */

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