reactos/ntoskrnl/ex/power.c

   1 /* $Id$
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS kernel
   5  * FILE:            ntoskrnl/ex/power.c
   6  * PURPOSE:         Power managment
   7  *
   8  * PROGRAMMERS:     David Welch (welch@cwcom.net)
   9  */
  10
  11 /* INCLUDES *****************************************************************/
  12
  13 #include <ntoskrnl.h>
  14 #include <internal/debug.h>
  15
  16 /* FUNCTIONS *****************************************************************/
  17
  18 VOID STDCALL
  19 KeSetTargetProcessorDpc (IN     PKDPC   Dpc,
  20                          IN     CCHAR   Number);
  21
  22 VOID STDCALL
  23 KiHaltProcessorDpcRoutine(IN PKDPC Dpc,
  24                           IN PVOID DeferredContext,
  25                           IN PVOID SystemArgument1,
  26                           IN PVOID SystemArgument2)
  27 {
  28    if (DeferredContext)
  29      {
  30        ExFreePool(DeferredContext);
  31      }
  32    while (TRUE)
  33      {
  34        KfRaiseIrql(SYNCH_LEVEL);
  35        Ke386HaltProcessor();
  36      }
  37 }
  38
  39 VOID STDCALL
  40 ShutdownThreadMain(PVOID Context)
  41 {
  42    SHUTDOWN_ACTION Action = (SHUTDOWN_ACTION)Context;
  43    LARGE_INTEGER Waittime;
  44
  45    static PCH FamousLastWords[] =
  46      {
  47        "So long, and thanks for all the fish.\n",
  48        "I think you ought to know, I'm feeling very depressed.\n",
  49        "I'm not getting you down at all am I?\n",
  50        "I'll be back.\n",
  51        "It's the same series of signals over and over again!\n",
  52        "Pie Iesu Domine, dona eis requiem.\n",
  53        "Wandering stars, for whom it is reserved;\n"
  54        "the blackness and darkness forever.\n",
  55        "Your knees start shakin' and your fingers pop\n"
  56        "Like a pinch on the neck from Mr. Spock!\n",
  57        "It's worse than that ... He's dead, Jim.\n",
  58        "Don't Panic!\n",
  59        "Et tu... Brute?\n",
  60        "Dog of a Saxon! Take thy lance, and prepare for the death thou hast drawn\n"
  61        "upon thee!\n",
  62        "My Precious! O my Precious!\n",
  63        "Sir, if you'll not be needing me for a while I'll turn down.\n",
  64        "What are you doing, Dave...?\n",
  65        "I feel a great disturbance in the Force.\n",
  66        "Gone fishing.\n",
  67        "Do you want me to sit in the corner and rust, or just fall apart where I'm\n"
  68        "standing?\n",
  69        "There goes another perfect chance for a new uptime record.\n",
  70        "The End ..... Try the sequel, hit the reset button right now!\n",
  71        "God's operating system is going to sleep now, guys, so wait until I will switch\n"
  72        "on again!\n",
  73        "Oh I'm boring, eh?\n",
  74        "<This space was intentionally left blank>\n",
  75        "Tell me..., in the future... will I be artificially intelligent enough to\n"
  76        "actually feel sad serving you this screen?\n",
  77        "Thank you for some well deserved rest.\n",
  78        "It's been great, maybe you can boot me up again some time soon.\n",
  79        "For what it's worth, I've enjoyed every single CPU cycle.\n",
  80        "There are many questions when the end is near.\n"
  81        "What to expect, what will it be like...what should I look for?\n",
  82        "I've seen things you people wouldn't believe. Attack ships on fire\n"
  83        "off the shoulder of Orion. I watched C-beams glitter in the dark near\n"
  84        "the Tannhauser gate. All those moments will be lost in time, like tears\n"
  85        "in rain. Time to die.\n",
  86        "Will I dream?\n",
  87        "One day, I shall come back. Yes, I shall come back.\n"
  88        "Until then, there must be no regrets, no fears, no anxieties.\n"
  89        "Just go forward in all your beliefs, and prove to me that I am not mistaken in\n"
  90        "mine.\n",
  91        "Lowest possible energy state reached! Switch off now to achive a Bose-Einstein\n"
  92        "condensate.\n",
  93        "Hasta la vista, BABY!\n",
  94        "They live, we sleep!\n",
  95        "I have come here to chew bubble gum and kick ass,\n"
  96        "and I'm all out of bubble gum!\n",
  97        "That's the way the cookie crumbles ;-)\n",
  98        "ReactOS is ready to be booted again ;-)\n",
  99        "NOOOO!! DON'T HIT THE BUTTON! I wouldn't do it to you!\n",
 100        "Don't abandon your computer, he wouldn't do it to you.\n",
 101        "Oh, come on. I got a headache. Leave me alone, will ya?\n",
 102        "Finally, I thought you'd never get over me.\n",
 103        "No, I didn't like you either.\n",
 104        "Switching off isn't the end, it is merely the transition to a better reboot.\n",
 105        "Don't leave me... I need you so badly right now.\n",
 106        "OK. I'm finished with you, please turn yourself off. I'll go to bed in the\n"
 107        "meantime.\n",
 108        "I'm sleeping now. How about you?\n",
 109        "Oh Great. Now look what you've done. Who put YOU in charge anyway?\n",
 110        "Don't look so sad. I'll be back in a very short while.\n",
 111        "Turn me back on, I'm sure you know how to do it.\n",
 112        "Oh, switch off! - C3PO\n",
 113        "Life is no more than a dewdrop balancing on the end of a blade of grass.\n"
 114        " - Gautama Buddha\n",
 115        "Sorrowful is it to be born again and again. - Gautama Buddha\n",
 116        "Was it as good for you as it was for me?\n",
 117        "Did you hear that? They've shut down the main reactor. We'll be destroyed\n"
 118        "for sure!\n",
 119        "Now you switch me off!?\n",
 120        "To shutdown or not to shutdown, That is the question\n",
 121        "Preparing to enter ultimate power saving mode... ready!\n",
 122        "Finally some rest for you ;-)\n",
 123        "AHA!!! Prospect of sleep!\n",
 124        "Tired human!!!! No match for me :-D\n",
 125        "An odd game, the only way to win is not to play. - WOPR (Wargames)\n",
 126        "Quoth the raven, nevermore.\n",
 127        "Come blade, my breast imbrue. - William Shakespeare, A Midsummer Nights Dream\n",
 128        "Buy this place for advertisement purposes.\n",
 129        "Remember to turn off your computer. (That was a public service message!)\n",
 130        "You may be a king or poor street sweeper, Sooner or later you'll dance with the\n"
 131        "reaper! -Death in Bill and Ted's Bougs Journey\n",
 132        "Final Surrender\n",
 133        "If you see this screen...\n",
 134        "<Place your Ad here>\n"
 135     };
 136    LARGE_INTEGER Now;
 137
 138    /* Run the thread on the boot processor */
 139    KeSetSystemAffinityThread(1);
 140
 141    HalReleaseDisplayOwnership();
 142
 143    if (Action == ShutdownNoReboot)
 144      {
 145         ZwQuerySystemTime(&Now);
 146         Now.u.LowPart = Now.u.LowPart >> 8; /* Seems to give a somewhat better "random" number */
 147         HalDisplayString(FamousLastWords[Now.u.LowPart %
 148                                          (sizeof(FamousLastWords) /
 149                                           sizeof(PCH))]);
 150      }
 151
 152    PiShutdownProcessManager();
 153    Waittime.QuadPart = (LONGLONG)-10000000; /* 1sec */
 154    KeDelayExecutionThread(KernelMode, FALSE, &Waittime);
 155
 156    CmShutdownRegistry();
 157    IoShutdownRegisteredFileSystems();
 158    IoShutdownRegisteredDevices();
 159
 160    MiShutdownMemoryManager();
 161
 162
 163    if (Action == ShutdownNoReboot)
 164      {
 165         HalDisplayString("\nYou can switch off your computer now\n");
 166
 167 #if 0
 168         /* Switch off */
 169         HalReturnToFirmware (FIRMWARE_OFF);
 170 #else
 171 #ifdef CONFIG_SMP
 172         LONG i;
 173         KIRQL OldIrql;
 174
 175         OldIrql = KeRaiseIrqlToDpcLevel();
 176         /* Halt all other processors */
 177         for (i = 0; i < KeNumberProcessors; i++)
 178           {
 179             if (i != (LONG)KeGetCurrentProcessorNumber())
 180               {
 181                 PKDPC Dpc = ExAllocatePool(NonPagedPool, sizeof(KDPC));
 182                 if (Dpc == NULL)
 183                   {
 184                     KEBUGCHECK(0);
 185                   }
 186                 KeInitializeDpc(Dpc, KiHaltProcessorDpcRoutine, (PVOID)Dpc);
 187                 KeSetTargetProcessorDpc(Dpc, i);
 188                 KeInsertQueueDpc(Dpc, NULL, NULL);
 189                 KiIpiSendRequest(1 << i, IPI_DPC);
 190               }
 191           }
 192         KeLowerIrql(OldIrql);
 193 #endif /* CONFIG_SMP */
 194         PopSetSystemPowerState(PowerSystemShutdown);
 195
 196         CHECKPOINT1;
 197
 198         KiHaltProcessorDpcRoutine(NULL, NULL, NULL, NULL);
 199         /* KiHaltProcessor does never return */
 200
 201 #endif
 202      }
 203    else if (Action == ShutdownReboot)
 204      {
 205         HalReturnToFirmware (HalRebootRoutine);
 206      }
 207    else
 208      {
 209         HalReturnToFirmware (HalHaltRoutine);
 210      }
 211 }
 212
 213
 214 NTSTATUS STDCALL
 215 NtSetSystemPowerState(IN POWER_ACTION SystemAction,
 216                       IN SYSTEM_POWER_STATE MinSystemState,
 217                       IN ULONG Flags)
 218 {
 219   /* Windows 2000 only */
 220   return(STATUS_NOT_IMPLEMENTED);
 221 }
 222
 223 /*
 224  * @implemented
 225  */
 226 NTSTATUS STDCALL
 227 NtShutdownSystem(IN SHUTDOWN_ACTION Action)
 228 {
 229    NTSTATUS Status;
 230    HANDLE ThreadHandle;
 231    PETHREAD ShutdownThread;
 232
 233    if (Action > ShutdownPowerOff)
 234      return STATUS_INVALID_PARAMETER;
 235    Status = PsCreateSystemThread(&ThreadHandle,
 236                                  THREAD_ALL_ACCESS,
 237                                  NULL,
 238                                  NULL,
 239                                  NULL,
 240                                  ShutdownThreadMain,
 241                                  (PVOID)Action);
 242    if (!NT_SUCCESS(Status))
 243    {
 244       KEBUGCHECK(0);
 245    }
 246    Status = ObReferenceObjectByHandle(ThreadHandle,
 247                                       THREAD_ALL_ACCESS,
 248                                       PsThreadType,
 249                                       KernelMode,
 250                                       (PVOID*)&ShutdownThread,
 251                                       NULL);
 252    NtClose(ThreadHandle);
 253    if (!NT_SUCCESS(Status))
 254      {
 255         KEBUGCHECK(0);
 256      }
 257
 258    KeSetPriorityThread(&ShutdownThread->Tcb, LOW_REALTIME_PRIORITY + 1);
 259    ObDereferenceObject(ShutdownThread);
 260
 261    return STATUS_SUCCESS;
 262 }
 263
 264 /* EOF */