iokit/Kernel/PMmisc.cpp

   1 /*
   2  * Copyright (c) 1998-2000 Apple Computer, 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 #include <IOKit/pwr_mgt/IOPM.h>
  29 #include <IOKit/IOService.h>
  30
  31 extern "C" {
  32 extern void kprintf(const char *, ...);
  33 }
  34
  35 static char rootDomain[ ] = "IOPMrootDomain";
  36 static char displayDevice[ ] = "IODisplayWrangler";
  37 static bool rootRegistered;
  38 static bool displayRegistered;
  39 static IOService * root;
  40 static IOService * display;
  41
  42 void IOPMLog(const char * who,unsigned long event,unsigned long param1, unsigned long param2)
  43 {
  44 //    kprintf("%s %02d %08x %08x\n",who,event,param1,param2);
  45 }
  46
  47
  48 void IOPMRegisterDevice(const char * who, IOService * theDevice)
  49 {
  50
  51     if ( strcmp(rootDomain,who) == 0 ) {                        // root power domain is registering
  52         theDevice->youAreRoot();
  53         rootRegistered = true;
  54         root = theDevice;
  55         if ( displayRegistered ) {
  56             root->addChild ( display );
  57         }
  58     }
  59     else{
  60         if ( strcmp(displayDevice,who) == 0 ) {                 // somebody else is registering
  61             displayRegistered = true;                           // save pointer to display wrangler
  62             display = theDevice;
  63         }
  64         if ( rootRegistered ) {                                 // if not root domain, then it's
  65             root->addChild ( theDevice );                               // one of its children
  66         }
  67     }
  68 }
  69