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 signal 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 artificial 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 we can boot me up again some time soon.\n",
  79        "For what's it 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        "NOO!! DONT HIT THE BUTTON! I wouldnt 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        "Yes 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     };
 135    LARGE_INTEGER Now;
 136
 137    /* Run the thread on the boot processor */
 138    KeSetSystemAffinityThread(1);
 139
 140    HalReleaseDisplayOwnership();
 141
 142    if (Action == ShutdownNoReboot)
 143      {
 144         ZwQuerySystemTime(&Now);
 145         Now.u.LowPart = Now.u.LowPart >> 8; /* Seems to give a somewhat better "random" number */
 146         HalDisplayString(FamousLastWords[Now.u.LowPart %
 147                                          (sizeof(FamousLastWords) /
 148                                           sizeof(PCH))]);
 149      }
 150
 151    CmShutdownRegistry();
 152    IoShutdownRegisteredFileSystems();
 153    IoShutdownRegisteredDevices();
 154
 155    PiShutdownProcessManager();
 156    MiShutdownMemoryManager();
 157
 158    Waittime.QuadPart = (LONGLONG)-10000000; /* 1sec */
 159    KeDelayExecutionThread(KernelMode, FALSE, &Waittime);
 160
 161    if (Action == ShutdownNoReboot)
 162      {
 163         HalDisplayString("\nYou can switch off your computer now\n");
 164
 165 #if 0
 166         /* Switch off */
 167         HalReturnToFirmware (FIRMWARE_OFF);
 168 #else
 169 #ifdef CONFIG_SMP
 170         LONG i;
 171         KIRQL OldIrql;
 172
 173         OldIrql = KeRaiseIrqlToDpcLevel();
 174         /* Halt all other processors */
 175         for (i = 0; i < KeNumberProcessors; i++)
 176           {
 177             if (i != (LONG)KeGetCurrentProcessorNumber())
 178               {
 179                 PKDPC Dpc = ExAllocatePool(NonPagedPool, sizeof(KDPC));
 180                 if (Dpc == NULL)
 181                   {
 182                     KEBUGCHECK(0);
 183                   }
 184                 KeInitializeDpc(Dpc, KiHaltProcessorDpcRoutine, (PVOID)Dpc);
 185                 KeSetTargetProcessorDpc(Dpc, i);
 186                 KeInsertQueueDpc(Dpc, NULL, NULL);
 187                 KiIpiSendRequest(1 << i, IPI_DPC);
 188               }
 189           }
 190         KeLowerIrql(OldIrql);
 191 #endif /* CONFIG_SMP */
 192         PopSetSystemPowerState(PowerSystemShutdown);
 193
 194         CHECKPOINT1;
 195
 196         KiHaltProcessorDpcRoutine(NULL, NULL, NULL, NULL);
 197         /* KiHaltProcessor does never return */
 198
 199 #endif
 200      }
 201    else if (Action == ShutdownReboot)
 202      {
 203         HalReturnToFirmware (HalRebootRoutine);
 204      }
 205    else
 206      {
 207         HalReturnToFirmware (HalHaltRoutine);
 208      }
 209 }
 210
 211
 212 NTSTATUS STDCALL
 213 NtSetSystemPowerState(IN POWER_ACTION SystemAction,
 214                       IN SYSTEM_POWER_STATE MinSystemState,
 215                       IN ULONG Flags)
 216 {
 217   /* Windows 2000 only */
 218   return(STATUS_NOT_IMPLEMENTED);
 219 }
 220
 221 /*
 222  * @implemented
 223  */
 224 NTSTATUS STDCALL
 225 NtShutdownSystem(IN SHUTDOWN_ACTION Action)
 226 {
 227    NTSTATUS Status;
 228    HANDLE ThreadHandle;
 229    PETHREAD ShutdownThread;
 230
 231    if (Action > ShutdownPowerOff)
 232      return STATUS_INVALID_PARAMETER;
 233    Status = PsCreateSystemThread(&ThreadHandle,
 234                                  THREAD_ALL_ACCESS,
 235                                  NULL,
 236                                  NULL,
 237                                  NULL,
 238                                  ShutdownThreadMain,
 239                                  (PVOID)Action);
 240    if (!NT_SUCCESS(Status))
 241    {
 242       KEBUGCHECK(0);
 243    }
 244    Status = ObReferenceObjectByHandle(ThreadHandle,
 245                                       THREAD_ALL_ACCESS,
 246                                       PsThreadType,
 247                                       KernelMode,
 248                                       (PVOID*)&ShutdownThread,
 249                                       NULL);
 250    NtClose(ThreadHandle);
 251    if (!NT_SUCCESS(Status))
 252      {
 253         KEBUGCHECK(0);
 254      }
 255
 256    KeSetPriorityThread(&ShutdownThread->Tcb, LOW_REALTIME_PRIORITY + 1);
 257    ObDereferenceObject(ShutdownThread);
 258
 259    return STATUS_SUCCESS;
 260 }
 261
 262 /* EOF */