osfmk/i386/acpi.c

   1 /*
   2  * Copyright (c) 2000-2007 Apple 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 <i386/misc_protos.h>
  30 #include <i386/cpu_data.h>
  31 #include <i386/proc_reg.h>
  32 #include <i386/pmap.h>
  33 #include <i386/mtrr.h>
  34 #include <i386/vmx/vmx_cpu.h>
  35 #include <i386/acpi.h>
  36 #include <i386/fpu.h>
  37 #include <i386/mp.h>
  38 #include <i386/mp_desc.h>
  39 #include <i386/serial_io.h>
  40 #include <i386/hpet.h>
  41 #include <i386/machine_check.h>
  42
  43 #include <kern/cpu_data.h>
  44 #include <console/serial_protos.h>
  45
  46 #if HIBERNATION
  47 #include <IOKit/IOHibernatePrivate.h>
  48 #endif
  49 #include <IOKit/IOPlatformExpert.h>
  50
  51 extern void     acpi_sleep_cpu(acpi_sleep_callback, void * refcon);
  52 extern char acpi_wake_start[];
  53 extern char     acpi_wake_end[];
  54
  55 extern void        set_kbd_leds(int leds);
  56
  57 extern void     fpinit(void);
  58
  59 vm_offset_t
  60 acpi_install_wake_handler(void)
  61 {
  62         /* copy wake code to ACPI_WAKE_ADDR in low memory */
  63         bcopy_phys(kvtophys((vm_offset_t)acpi_wake_start),
  64                    (addr64_t) ACPI_WAKE_ADDR,
  65                    acpi_wake_end - acpi_wake_start);
  66
  67         /* flush cache */
  68         wbinvd();
  69
  70         /* return physical address of the wakeup code */
  71         return ACPI_WAKE_ADDR;
  72 }
  73
  74 #if HIBERNATION
  75 struct acpi_hibernate_callback_data {
  76         acpi_sleep_callback func;
  77         void *refcon;
  78 };
  79 typedef struct acpi_hibernate_callback_data acpi_hibernate_callback_data_t;
  80
  81 static void
  82 acpi_hibernate(void *refcon)
  83 {
  84         uint32_t mode;
  85
  86         acpi_hibernate_callback_data_t *data =
  87                 (acpi_hibernate_callback_data_t *)refcon;
  88
  89         if (current_cpu_datap()->cpu_hibernate)
  90         {
  91                 cpu_IA32e_enable(current_cpu_datap());
  92
  93                 mode = hibernate_write_image();
  94
  95                 if( mode == kIOHibernatePostWriteHalt )
  96                 {
  97                         // off
  98                         HIBLOG("power off\n");
  99                         if (PE_halt_restart) (*PE_halt_restart)(kPEHaltCPU);
 100                 }
 101                 else if( mode == kIOHibernatePostWriteRestart )
 102                 {
 103                         // restart
 104                         HIBLOG("restart\n");
 105                         if (PE_halt_restart) (*PE_halt_restart)(kPERestartCPU);
 106                 }
 107                 else
 108                 {
 109                         // sleep
 110                         HIBLOG("sleep\n");
 111
 112                         // should we come back via regular wake, set the state in memory.
 113                         cpu_datap(0)->cpu_hibernate = 0;
 114                 }
 115
 116                 /*
 117                  * If we're in 64-bit mode, drop back into legacy mode during sleep.
 118                  */
 119                 cpu_IA32e_disable(current_cpu_datap());
 120
 121         }
 122
 123         (data->func)(data->refcon);
 124
 125         /* should never get here! */
 126 }
 127 #endif
 128
 129 static uint64_t         acpi_sleep_abstime;
 130
 131 void
 132 acpi_sleep_kernel(acpi_sleep_callback func, void *refcon)
 133 {
 134 #if HIBERNATION
 135         acpi_hibernate_callback_data_t data;
 136         boolean_t did_hibernate;
 137 #endif
 138
 139         kprintf("acpi_sleep_kernel hib=%d\n",
 140                         current_cpu_datap()->cpu_hibernate);
 141
 142         /* shutdown local APIC before passing control to BIOS */
 143         lapic_shutdown();
 144
 145 #if HIBERNATION
 146         data.func = func;
 147         data.refcon = refcon;
 148 #endif
 149
 150         /* Save HPET state */
 151         hpet_save();
 152
 153         /*
 154          * Turn off VT, otherwise switching to legacy mode will fail
 155          */
 156         vmx_suspend();
 157
 158         /*
 159          * If we're in 64-bit mode, drop back into legacy mode during sleep.
 160          */
 161         cpu_IA32e_disable(current_cpu_datap());
 162
 163         acpi_sleep_abstime = mach_absolute_time();
 164
 165         /*
 166          * Save master CPU state and sleep platform.
 167          * Will not return until platform is woken up,
 168          * or if sleep failed.
 169          */
 170 #if HIBERNATION
 171         acpi_sleep_cpu(acpi_hibernate, &data);
 172 #else
 173         acpi_sleep_cpu(func, refcon);
 174 #endif
 175
 176         /* reset UART if kprintf is enabled */
 177         if (FALSE == disable_serial_output)
 178                 serial_init();
 179
 180 #if HIBERNATION
 181         if (current_cpu_datap()->cpu_hibernate) {
 182                 int i;
 183                 for (i = 0; i < PMAP_NWINDOWS; i++)
 184                         *current_cpu_datap()->cpu_pmap->mapwindow[i].prv_CMAP = 0;
 185                 current_cpu_datap()->cpu_hibernate = 0;
 186                 did_hibernate = TRUE;
 187
 188         } else
 189 #endif
 190         {
 191                 did_hibernate = FALSE;
 192         }
 193
 194         /* Re-enable mode (including 64-bit if applicable) */
 195         cpu_mode_init(current_cpu_datap());
 196
 197         /* Re-enable machine check handling */
 198         mca_cpu_init();
 199
 200         /* restore MTRR settings */
 201         mtrr_update_cpu();
 202
 203         /*
 204          * Restore VT mode
 205          */
 206         vmx_resume();
 207
 208         /* set up PAT following boot processor power up */
 209         pat_init();
 210
 211         /* let the realtime clock reset */
 212         rtc_sleep_wakeup(acpi_sleep_abstime);
 213
 214         if (did_hibernate)
 215                 hibernate_machine_init();
 216
 217         /* re-enable and re-init local apic */
 218         if (lapic_probe())
 219                 lapic_init();
 220
 221         /* Restore HPET state */
 222         hpet_restore();
 223
 224         /* Restart tick interrupts from the LAPIC timer */
 225         rtc_lapic_start_ticking();
 226
 227         fpinit();
 228         clear_fpu();
 229
 230 #if HIBERNATION
 231         if (did_hibernate)
 232                 enable_preemption();
 233
 234         kprintf("ret from acpi_sleep_cpu hib=%d\n", did_hibernate);
 235 #endif
 236 }