osfmk/kern/hibernate.c

   1 /*
   2  * Copyright (c) 2004-2005 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 #include <kern/kalloc.h>
  30 #include <kern/machine.h>
  31 #include <kern/misc_protos.h>
  32 #include <kern/thread.h>
  33 #include <kern/processor.h>
  34 #include <mach/machine.h>
  35 #include <mach/processor_info.h>
  36 #include <mach/mach_types.h>
  37 #include <default_pager/default_pager_internal.h>
  38 #include <IOKit/IOPlatformExpert.h>
  39
  40 #include <IOKit/IOHibernatePrivate.h>
  41 #include <vm/vm_page.h>
  42 #include <vm/vm_pageout.h>
  43 #include <vm/vm_purgeable_internal.h>
  44 #include <vm/vm_compressor.h>
  45
  46 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
  47
  48 boolean_t       need_to_unlock_decompressor = FALSE;
  49
  50 kern_return_t
  51 hibernate_alloc_page_lists(
  52                 hibernate_page_list_t ** page_list_ret,
  53                 hibernate_page_list_t ** page_list_wired_ret,
  54                 hibernate_page_list_t ** page_list_pal_ret)
  55 {
  56     kern_return_t       retval = KERN_SUCCESS;
  57
  58     hibernate_page_list_t * page_list = NULL;
  59     hibernate_page_list_t * page_list_wired = NULL;
  60     hibernate_page_list_t * page_list_pal = NULL;
  61
  62     page_list = hibernate_page_list_allocate(TRUE);
  63     if (!page_list) {
  64
  65             retval = KERN_RESOURCE_SHORTAGE;
  66             goto done;
  67     }
  68     page_list_wired = hibernate_page_list_allocate(FALSE);
  69     if (!page_list_wired)
  70     {
  71             kfree(page_list, page_list->list_size);
  72
  73             retval = KERN_RESOURCE_SHORTAGE;
  74             goto done;
  75     }
  76     page_list_pal = hibernate_page_list_allocate(FALSE);
  77     if (!page_list_pal)
  78     {
  79             kfree(page_list, page_list->list_size);
  80             kfree(page_list_wired, page_list_wired->list_size);
  81
  82             retval = KERN_RESOURCE_SHORTAGE;
  83             goto done;
  84     }
  85     *page_list_ret        = page_list;
  86     *page_list_wired_ret  = page_list_wired;
  87     *page_list_pal_ret    = page_list_pal;
  88
  89 done:
  90     return (retval);
  91
  92 }
  93
  94 extern int sync_internal(void);
  95
  96 kern_return_t
  97 hibernate_setup(IOHibernateImageHeader * header,
  98                         boolean_t vmflush,
  99                         hibernate_page_list_t * page_list __unused,
 100                         hibernate_page_list_t * page_list_wired __unused,
 101                         hibernate_page_list_t * page_list_pal __unused)
 102 {
 103     kern_return_t       retval = KERN_SUCCESS;
 104
 105     hibernate_create_paddr_map();
 106
 107     hibernate_reset_stats();
 108
 109     if (vmflush && (COMPRESSED_PAGER_IS_ACTIVE || dp_isssd)) {
 110
 111             sync_internal();
 112
 113             if (COMPRESSED_PAGER_IS_ACTIVE) {
 114                     vm_decompressor_lock();
 115                     need_to_unlock_decompressor = TRUE;
 116             }
 117             hibernate_flush_memory();
 118     }
 119
 120     // no failures hereafter
 121
 122     hibernate_processor_setup(header);
 123
 124     HIBLOG("hibernate_alloc_pages act %d, inact %d, anon %d, throt %d, spec %d, wire %d, wireinit %d\n",
 125             vm_page_active_count, vm_page_inactive_count,
 126             vm_page_anonymous_count,  vm_page_throttled_count, vm_page_speculative_count,
 127             vm_page_wire_count, vm_page_wire_count_initial);
 128
 129     if (retval != KERN_SUCCESS && need_to_unlock_decompressor == TRUE) {
 130             need_to_unlock_decompressor = FALSE;
 131             vm_decompressor_unlock();
 132     }
 133     return (retval);
 134 }
 135
 136 kern_return_t
 137 hibernate_teardown(hibernate_page_list_t * page_list,
 138                     hibernate_page_list_t * page_list_wired,
 139                     hibernate_page_list_t * page_list_pal)
 140 {
 141     hibernate_free_gobble_pages();
 142
 143     if (page_list)
 144         kfree(page_list, page_list->list_size);
 145     if (page_list_wired)
 146         kfree(page_list_wired, page_list_wired->list_size);
 147     if (page_list_pal)
 148         kfree(page_list_pal, page_list_pal->list_size);
 149
 150     if (COMPRESSED_PAGER_IS_ACTIVE) {
 151             if (need_to_unlock_decompressor == TRUE) {
 152                     need_to_unlock_decompressor = FALSE;
 153                     vm_decompressor_unlock();
 154             }
 155             vm_compressor_delay_trim();
 156     }
 157     return (KERN_SUCCESS);
 158 }