osfmk/i386/acpi.c

   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 #include <i386/misc_protos.h>
  24 #include <i386/proc_reg.h>
  25 #include <i386/pmap.h>
  26 #include <i386/mtrr.h>
  27 #include <i386/acpi.h>
  28 #include <i386/mp.h>
  29
  30 #include <kern/cpu_data.h>
  31 #include <IOKit/IOPlatformExpert.h>
  32
  33 extern void     acpi_sleep_cpu(acpi_sleep_callback, void * refcon);
  34 extern char acpi_wake_start[];
  35 extern char     acpi_wake_end[];
  36
  37 extern int      serial_init(void);
  38 extern unsigned int disableSerialOuput;
  39
  40 extern void        set_kbd_leds(int leds);
  41
  42 vm_offset_t
  43 acpi_install_wake_handler(void)
  44 {
  45         /* copy wake code to ACPI_WAKE_ADDR in low memory */
  46         bcopy_phys((addr64_t) kvtophys((vm_offset_t)acpi_wake_start),
  47                    (addr64_t) ACPI_WAKE_ADDR,
  48                    acpi_wake_end - acpi_wake_start);
  49
  50         /* flush cache */
  51         wbinvd();
  52
  53         /* return physical address of the wakeup code */
  54         return ACPI_WAKE_ADDR;
  55 }
  56
  57 typedef struct acpi_sleep_callback_data {
  58     acpi_sleep_callback func;
  59     void *refcon;
  60 } acpi_sleep_callback_data;
  61
  62 static void
  63 acpi_sleep_do_callback(void *refcon)
  64 {
  65     acpi_sleep_callback_data *data = (acpi_sleep_callback_data *)refcon;
  66
  67
  68     (data->func)(data->refcon);
  69
  70     /* should never get here! */
  71 }
  72
  73 void
  74 acpi_sleep_kernel(acpi_sleep_callback func, void *refcon)
  75 {
  76     acpi_sleep_callback_data data;
  77
  78         /* shutdown local APIC before passing control to BIOS */
  79         lapic_shutdown();
  80
  81     data.func = func;
  82     data.refcon = refcon;
  83
  84         /*
  85          * Save master CPU state and sleep platform.
  86          * Will not return until platform is woken up,
  87          * or if sleep failed.
  88          */
  89     acpi_sleep_cpu(acpi_sleep_do_callback, &data);
  90
  91         /* reset UART if kprintf is enabled */
  92         if (FALSE == disableSerialOuput)
  93                 serial_init();
  94
  95
  96         /* restore MTRR settings */
  97         mtrr_update_cpu();
  98
  99         /* set up PAT following boot processor power up */
 100         pat_init();
 101
 102         /* re-enable and re-init local apic */
 103         if (lapic_probe())
 104                 lapic_init();
 105
 106         /* let the realtime clock reset */
 107         rtc_sleep_wakeup();
 108
 109 }