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 <IOKit/IOPlatformExpert.h>
  38
  39 #include <IOKit/IOHibernatePrivate.h>
  40 #include <vm/vm_page.h>
  41 #include <vm/vm_pageout.h>
  42 #include <vm/vm_purgeable_internal.h>
  43 #include <vm/vm_compressor.h>
  44
  45 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
  46
  47 boolean_t       need_to_unlock_decompressor = FALSE;
  48
  49 kern_return_t
  50 hibernate_alloc_page_lists(
  51         hibernate_page_list_t ** page_list_ret,
  52         hibernate_page_list_t ** page_list_wired_ret,
  53         hibernate_page_list_t ** page_list_pal_ret)
  54 {
  55         kern_return_t       retval = KERN_SUCCESS;
  56
  57         hibernate_page_list_t * page_list = NULL;
  58         hibernate_page_list_t * page_list_wired = NULL;
  59         hibernate_page_list_t * page_list_pal = NULL;
  60
  61         page_list = hibernate_page_list_allocate(TRUE);
  62         if (!page_list) {
  63                 retval = KERN_RESOURCE_SHORTAGE;
  64                 goto done;
  65         }
  66         page_list_wired = hibernate_page_list_allocate(FALSE);
  67         if (!page_list_wired) {
  68                 kfree(page_list, page_list->list_size);
  69
  70                 retval = KERN_RESOURCE_SHORTAGE;
  71                 goto done;
  72         }
  73         page_list_pal = hibernate_page_list_allocate(FALSE);
  74         if (!page_list_pal) {
  75                 kfree(page_list, page_list->list_size);
  76                 kfree(page_list_wired, page_list_wired->list_size);
  77
  78                 retval = KERN_RESOURCE_SHORTAGE;
  79                 goto done;
  80         }
  81         *page_list_ret        = page_list;
  82         *page_list_wired_ret  = page_list_wired;
  83         *page_list_pal_ret    = page_list_pal;
  84
  85 done:
  86         return retval;
  87 }
  88
  89 extern int sync_internal(void);
  90
  91 kern_return_t
  92 hibernate_setup(IOHibernateImageHeader * header,
  93     boolean_t vmflush,
  94     hibernate_page_list_t * page_list __unused,
  95     hibernate_page_list_t * page_list_wired __unused,
  96     hibernate_page_list_t * page_list_pal __unused)
  97 {
  98         kern_return_t       retval = KERN_SUCCESS;
  99
 100         hibernate_create_paddr_map();
 101
 102         hibernate_reset_stats();
 103
 104         if (vmflush && VM_CONFIG_COMPRESSOR_IS_PRESENT) {
 105                 sync_internal();
 106
 107                 vm_decompressor_lock();
 108                 need_to_unlock_decompressor = TRUE;
 109
 110                 hibernate_flush_memory();
 111         }
 112
 113         // no failures hereafter
 114
 115         hibernate_processor_setup(header);
 116
 117         HIBLOG("hibernate_alloc_pages act %d, inact %d, anon %d, throt %d, spec %d, wire %d, wireinit %d\n",
 118             vm_page_active_count, vm_page_inactive_count,
 119             vm_page_anonymous_count, vm_page_throttled_count, vm_page_speculative_count,
 120             vm_page_wire_count, vm_page_wire_count_initial);
 121
 122         if (retval != KERN_SUCCESS && need_to_unlock_decompressor == TRUE) {
 123                 need_to_unlock_decompressor = FALSE;
 124                 vm_decompressor_unlock();
 125         }
 126         return retval;
 127 }
 128
 129 kern_return_t
 130 hibernate_teardown(hibernate_page_list_t * page_list,
 131     hibernate_page_list_t * page_list_wired,
 132     hibernate_page_list_t * page_list_pal)
 133 {
 134         hibernate_free_gobble_pages();
 135
 136         if (page_list) {
 137                 kfree(page_list, page_list->list_size);
 138         }
 139         if (page_list_wired) {
 140                 kfree(page_list_wired, page_list_wired->list_size);
 141         }
 142         if (page_list_pal) {
 143                 kfree(page_list_pal, page_list_pal->list_size);
 144         }
 145
 146         if (VM_CONFIG_COMPRESSOR_IS_PRESENT) {
 147                 if (need_to_unlock_decompressor == TRUE) {
 148                         need_to_unlock_decompressor = FALSE;
 149                         vm_decompressor_unlock();
 150                 }
 151                 vm_compressor_delay_trim();
 152         }
 153         return KERN_SUCCESS;
 154 }