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    PiShutdownProcessManager();
 152    Waittime.QuadPart = (LONGLONG)-10000000; /* 1sec */
 153    KeDelayExecutionThread(KernelMode, FALSE, &Waittime);
 154
 155    CmShutdownRegistry();
 156    IoShutdownRegisteredFileSystems();
 157    IoShutdownRegisteredDevices();
 158
 159    MiShutdownMemoryManager();
 160
 161
 162    if (Action == ShutdownNoReboot)
 163      {
 164         HalDisplayString("\nYou can switch off your computer now\n");
 165
 166 #if 0
 167         /* Switch off */
 168         HalReturnToFirmware (FIRMWARE_OFF);
 169 #else
 170 #ifdef CONFIG_SMP
 171         LONG i;
 172         KIRQL OldIrql;
 173
 174         OldIrql = KeRaiseIrqlToDpcLevel();
 175         /* Halt all other processors */
 176         for (i = 0; i < KeNumberProcessors; i++)
 177           {
 178             if (i != (LONG)KeGetCurrentProcessorNumber())
 179               {
 180                 PKDPC Dpc = ExAllocatePool(NonPagedPool, sizeof(KDPC));
 181                 if (Dpc == NULL)
 182                   {
 183                     KEBUGCHECK(0);
 184                   }
 185                 KeInitializeDpc(Dpc, KiHaltProcessorDpcRoutine, (PVOID)Dpc);
 186                 KeSetTargetProcessorDpc(Dpc, i);
 187                 KeInsertQueueDpc(Dpc, NULL, NULL);
 188                 KiIpiSendRequest(1 << i, IPI_DPC);
 189               }
 190           }
 191         KeLowerIrql(OldIrql);
 192 #endif /* CONFIG_SMP */
 193         PopSetSystemPowerState(PowerSystemShutdown);
 194
 195         CHECKPOINT1;
 196
 197         KiHaltProcessorDpcRoutine(NULL, NULL, NULL, NULL);
 198         /* KiHaltProcessor does never return */
 199
 200 #endif
 201      }
 202    else if (Action == ShutdownReboot)
 203      {
 204         HalReturnToFirmware (HalRebootRoutine);
 205      }
 206    else
 207      {
 208         HalReturnToFirmware (HalHaltRoutine);
 209      }
 210 }
 211
 212
 213 NTSTATUS STDCALL
 214 NtSetSystemPowerState(IN POWER_ACTION SystemAction,
 215                       IN SYSTEM_POWER_STATE MinSystemState,
 216                       IN ULONG Flags)
 217 {
 218   /* Windows 2000 only */
 219   return(STATUS_NOT_IMPLEMENTED);
 220 }
 221
 222 /*
 223  * @implemented
 224  */
 225 NTSTATUS STDCALL
 226 NtShutdownSystem(IN SHUTDOWN_ACTION Action)
 227 {
 228    NTSTATUS Status;
 229    HANDLE ThreadHandle;
 230    PETHREAD ShutdownThread;
 231
 232    if (Action > ShutdownPowerOff)
 233      return STATUS_INVALID_PARAMETER;
 234    Status = PsCreateSystemThread(&ThreadHandle,
 235                                  THREAD_ALL_ACCESS,
 236                                  NULL,
 237                                  NULL,
 238                                  NULL,
 239                                  ShutdownThreadMain,
 240                                  (PVOID)Action);
 241    if (!NT_SUCCESS(Status))
 242    {
 243       KEBUGCHECK(0);
 244    }
 245    Status = ObReferenceObjectByHandle(ThreadHandle,
 246                                       THREAD_ALL_ACCESS,
 247                                       PsThreadType,
 248                                       KernelMode,
 249                                       (PVOID*)&ShutdownThread,
 250                                       NULL);
 251    NtClose(ThreadHandle);
 252    if (!NT_SUCCESS(Status))
 253      {
 254         KEBUGCHECK(0);
 255      }
 256
 257    KeSetPriorityThread(&ShutdownThread->Tcb, LOW_REALTIME_PRIORITY + 1);
 258    ObDereferenceObject(ShutdownThread);
 259
 260    return STATUS_SUCCESS;
 261 }
 262
 263 /* EOF */