osfmk/vm/vm_pageout.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_pageout.h
  54  *      Author: Avadis Tevanian, Jr.
  55  *      Date:   1986
  56  *
  57  *      Declarations for the pageout daemon interface.
  58  */
  59
  60 #ifndef _VM_VM_PAGEOUT_H_
  61 #define _VM_VM_PAGEOUT_H_
  62
  63 #include <mach/boolean.h>
  64 #include <mach/machine/vm_types.h>
  65 #include <vm/vm_object.h>
  66 #include <vm/vm_page.h>
  67
  68
  69
  70
  71 extern unsigned int     vm_pageout_scan_event_counter;
  72 extern unsigned int     vm_zf_count;
  73
  74 /*
  75  *      The following ifdef only exists because XMM must (currently)
  76  *      be given a page at a time.  This should be removed
  77  *      in the future.
  78  */
  79 #define DATA_WRITE_MAX  16
  80 #define POINTER_T(copy) (pointer_t)(copy)
  81
  82 /*
  83  *      Exported routines.
  84  */
  85 extern void             vm_pageout(void);
  86
  87 extern vm_object_t      vm_pageout_object_allocate(
  88                                         vm_page_t               m,
  89                                         vm_size_t               size,
  90                                         vm_object_offset_t      offset);
  91
  92 extern void             vm_pageout_object_terminate(
  93                                         vm_object_t     object);
  94
  95 extern vm_page_t        vm_pageout_setup(
  96                                         vm_page_t               m,
  97                                         vm_object_t             new_object,
  98                                         vm_object_offset_t      new_offset);
  99
 100 extern void             vm_pageout_cluster(
 101                                         vm_page_t       m);
 102
 103 extern void             vm_pageout_initialize_page(
 104                                         vm_page_t       m);
 105
 106 extern void             vm_pageclean_setup(
 107                                         vm_page_t               m,
 108                                         vm_page_t               new_m,
 109                                         vm_object_t             new_object,
 110                                         vm_object_offset_t      new_offset);
 111
 112 extern void             vm_pageclean_copy(
 113                                         vm_page_t               m,
 114                                         vm_page_t               new_m,
 115                                         vm_object_t             new_object,
 116                                         vm_object_offset_t      new_offset);
 117
 118 /* UPL exported routines and structures */
 119
 120 #define UPL_COMPOSITE_PAGE_LIST_MAX 16
 121
 122
 123 #define upl_lock_init(object)   mutex_init(&(object)->Lock, ETAP_VM_OBJ)
 124 #define upl_lock(object)        mutex_lock(&(object)->Lock)
 125 #define upl_unlock(object)      mutex_unlock(&(object)->Lock)
 126
 127
 128 /* universal page list structure */
 129
 130 struct upl {
 131         decl_mutex_data(,       Lock)   /* Synchronization */
 132         int             ref_count;
 133         int             flags;
 134         vm_object_t     src_object; /* object derived from */
 135         vm_object_offset_t offset;
 136         vm_size_t       size;       /* size in bytes of the address space */
 137         vm_offset_t     kaddr;      /* secondary mapping in kernel */
 138         vm_object_t     map_object;
 139 #ifdef  UBC_DEBUG
 140         unsigned int    ubc_alias1;
 141         unsigned int    ubc_alias2;
 142         queue_chain_t   uplq;       /* List of outstanding upls on an obj */
 143 #endif  /* UBC_DEBUG */
 144
 145 };
 146
 147
 148
 149 /* upl struct flags */
 150 #define UPL_PAGE_LIST_MAPPED    0x1
 151 #define UPL_KERNEL_MAPPED       0x2
 152 #define UPL_CLEAR_DIRTY         0x4
 153 #define UPL_COMPOSITE_LIST      0x8
 154 #define UPL_INTERNAL            0x10
 155 #define UPL_PAGE_SYNC_DONE      0x20
 156 #define UPL_DEVICE_MEMORY       0x40
 157 #define UPL_PAGEOUT             0x80
 158
 159 #define UPL_PAGE_TICKET_MASK    0xF00
 160 #define UPL_PAGE_TICKET_SHIFT   8
 161
 162
 163
 164
 165
 166
 167
 168 #endif  /* _VM_VM_PAGEOUT_H_ */