osfmk/vm/vm_fault.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * @OSF_COPYRIGHT@
  24  */
  25 /*
  26  * Mach Operating System
  27  * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
  28  * All Rights Reserved.
  29  *
  30  * Permission to use, copy, modify and distribute this software and its
  31  * documentation is hereby granted, provided that both the copyright
  32  * notice and this permission notice appear in all copies of the
  33  * software, derivative works or modified versions, and any portions
  34  * thereof, and that both notices appear in supporting documentation.
  35  *
  36  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  37  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  38  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  39  *
  40  * Carnegie Mellon requests users of this software to return to
  41  *
  42  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  43  *  School of Computer Science
  44  *  Carnegie Mellon University
  45  *  Pittsburgh PA 15213-3890
  46  *
  47  * any improvements or extensions that they make and grant Carnegie Mellon
  48  * the rights to redistribute these changes.
  49  */
  50 /*
  51  */
  52 /*
  53  *      File:   vm/vm_fault.h
  54  *
  55  *      Page fault handling module declarations.
  56  */
  57
  58 #ifndef _VM_VM_FAULT_H_
  59 #define _VM_VM_FAULT_H_
  60
  61 #include <mach/kern_return.h>
  62 #include <mach/boolean.h>
  63 #include <mach/vm_prot.h>
  64 #include <mach/vm_param.h>
  65 #include <mach/vm_behavior.h>
  66 #include <vm/vm_page.h>
  67 #include <vm/vm_object.h>
  68 #include <vm/vm_map.h>
  69
  70 typedef kern_return_t   vm_fault_return_t;
  71 #define VM_FAULT_SUCCESS                0
  72 #define VM_FAULT_RETRY                  1
  73 #define VM_FAULT_INTERRUPTED            2
  74 #define VM_FAULT_MEMORY_SHORTAGE        3
  75 #define VM_FAULT_FICTITIOUS_SHORTAGE    4
  76 #define VM_FAULT_MEMORY_ERROR           5
  77
  78 extern void vm_fault_init(void);
  79
  80 /*
  81  *      Page fault handling based on vm_object only.
  82  */
  83
  84 extern vm_fault_return_t vm_fault_page(
  85                 /* Arguments: */
  86                 vm_object_t     first_object,   /* Object to begin search */
  87                 vm_object_offset_t first_offset,/* Offset into object */
  88                 vm_prot_t       fault_type,     /* What access is requested */
  89                 boolean_t       must_be_resident,/* Must page be resident? */
  90                 int             interruptible,/* how may fault be interrupted */
  91                 vm_object_offset_t lo_offset,   /* Map entry start */
  92                 vm_object_offset_t hi_offset,   /* Map entry end */
  93                 vm_behavior_t   behavior,       /* Expected paging behavior */
  94                 /* Modifies in place: */
  95                 vm_prot_t       *protection,    /* Protection for mapping */
  96                 /* Returns: */
  97                 vm_page_t       *result_page,   /* Page found, if successful */
  98                 vm_page_t       *top_page,      /* Page in top object, if
  99                                                  * not result_page.  */
 100                 int             *type_of_fault, /* if non-zero, return COW, zero-filled, etc...
 101                                                  * used by kernel trace point in vm_fault */
 102                 /* More arguments: */
 103                 kern_return_t   *error_code,    /* code if page is in error */
 104                 boolean_t       no_zero_fill,   /* don't fill absent pages */
 105                 boolean_t       data_supply);   /* treat as data_supply */
 106
 107 extern void vm_fault_cleanup(
 108                 vm_object_t     object,
 109                 vm_page_t       top_page);
 110 /*
 111  *      Page fault handling based on vm_map (or entries therein)
 112  */
 113
 114 extern kern_return_t vm_fault(
 115                 vm_map_t        map,
 116                 vm_offset_t     vaddr,
 117                 vm_prot_t       fault_type,
 118                 boolean_t       change_wiring,
 119                 int             interruptible);
 120
 121 extern kern_return_t vm_fault_wire(
 122                 vm_map_t        map,
 123                 vm_map_entry_t  entry,
 124                 pmap_t          pmap);
 125
 126 extern void vm_fault_unwire(
 127                 vm_map_t        map,
 128                 vm_map_entry_t  entry,
 129                 boolean_t       deallocate,
 130                 pmap_t          pmap);
 131
 132 extern kern_return_t    vm_fault_copy(
 133                 vm_object_t             src_object,
 134                 vm_object_offset_t      src_offset,
 135                 vm_size_t               *src_size,      /* INOUT */
 136                 vm_object_t             dst_object,
 137                 vm_object_offset_t      dst_offset,
 138                 vm_map_t                dst_map,
 139                 vm_map_version_t         *dst_version,
 140                 int                     interruptible);
 141
 142 #endif  /* _VM_VM_FAULT_H_ */