+++ /dev/null
-/*
- * Copyright (c) 1998-2001 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-/*
- * Copyright (c) 1998 Apple Computer, Inc. All rights reserved.
- *
- * HISTORY
- * 9 May 01 suurballe.
- */
-
-#include <IOKit/pwr_mgt/IOPMPagingPlexus.h>
-#include <IOKit/pwr_mgt/IOPM.h>
-#include <IOKit/pwr_mgt/RootDomain.h>
-#include <IOKit/pwr_mgt/IOPowerConnection.h>
-#include <IOKit/IOLib.h>
-
-extern char rootdevice[];
-
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-
-#define super IOService
-OSDefineMetaClassAndStructors(IOPMPagingPlexus,IOService)
-
-
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-
-// stub driver has two power states, off and on
-
-enum { kIOPlexusPowerStateCount = 2 };
-
-static const IOPMPowerState powerStates[ kIOPlexusPowerStateCount ] = {
- { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
- { 1, 0, IOPMPagingAvailable, IOPMPowerOn, 0, 0, 0, 0, 0, 0, 0, 0 }
-};
-
-//* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-// initialize
-//
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-
-bool IOPMPagingPlexus::start ( IOService * provider )
-{
- super::start(provider);
-
- ourLock = IOLockAlloc();
- systemBooting = true;
-
- PMinit(); // initialize superclass variables
-
- registerPowerDriver(this,(IOPMPowerState *)powerStates,kIOPlexusPowerStateCount);
-
- return true;
-}
-
-
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-// setAggressiveness
-//
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-
-IOReturn IOPMPagingPlexus::setAggressiveness ( unsigned long type, unsigned long )
-{
- OSDictionary * dict;
- OSIterator * iter;
- OSObject * next;
- IOService * candidate = 0;
- IOService * pagingProvider;
-
- if( type != kPMMinutesToSleep)
- return IOPMNoErr;
-
- IOLockLock(ourLock);
- if ( systemBooting ) {
- systemBooting = false;
- IOLockUnlock(ourLock);
- dict = IOBSDNameMatching(rootdevice);
- if ( dict ) {
- iter = getMatchingServices(dict);
- if ( iter ) {
- while ( (next = iter->getNextObject()) ) {
- if ( (candidate = OSDynamicCast(IOService,next)) ) {
- break;
- }
- }
- iter->release();
- }
- }
- if ( candidate ) {
- pagingProvider = findProvider(candidate);
- if ( pagingProvider ) {
- processSiblings(pagingProvider);
- pagingProvider->addPowerChild(this);
- getPMRootDomain()->removePowerChild(((IOPowerConnection *)getParentEntry(gIOPowerPlane)));
- processChildren();
- }
- }
- }
- else {
- IOLockUnlock(ourLock);
- }
- return IOPMNoErr;
-}
-
-
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-// findProvider
-//
-// Climb upward in the power tree from the node pointed to by the parameter.
-// Return a pointer to the first power-managed entity encountered.
-// This is the provider of paging services (the root device disk driver).
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-
-IOService * IOPMPagingPlexus::findProvider ( IOService * mediaObject )
-{
- IORegistryEntry * node = mediaObject;
-
- if ( mediaObject == NULL ) {
- return NULL;
- }
-
- while ( node ) {
- if ( node->inPlane(gIOPowerPlane) ) {
- return (IOService *)node;
- }
- node = node->getParentEntry(gIOServicePlane);
- }
- return NULL;
-}
-
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-// processSiblings
-//
-// Climb upward in the power tree from the node pointed to by the parameter.
-// "Other" children of each ancestor (not the nodes in our upward path) are
-// made children of this plexus, so they get paging services from here.
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-
-void IOPMPagingPlexus::processSiblings ( IOService * aNode )
-{
- OSIterator * parentIterator;
- IORegistryEntry * nextNub;
- IORegistryEntry * nextParent;
- OSIterator * siblingIterator;
- IORegistryEntry * nextSibling;
-
- parentIterator = aNode->getParentIterator(gIOPowerPlane); // iterate parents of this node
-
- if ( parentIterator ) {
- while ( true ) {
- if ( ! (nextNub = (IORegistryEntry *)(parentIterator->getNextObject())) ) {
- parentIterator->release();
- break;
- }
- if ( OSDynamicCast(IOPowerConnection,nextNub) ) {
- nextParent = nextNub->getParentEntry(gIOPowerPlane);
- if ( nextParent == getPMRootDomain() ) {
- continue; // plexus already has root's children
- }
- if ( nextParent == this ) {
- parentIterator->release();
- removePowerChild((IOPowerConnection *)nextNub);
- break;
- }
- siblingIterator = nextParent->getChildIterator(gIOPowerPlane);
- // iterate children of this parent
- if ( siblingIterator ) {
- while ( (nextSibling = (IORegistryEntry *)(siblingIterator->getNextObject())) ) {
- if ( OSDynamicCast(IOPowerConnection,nextSibling) ) {
- nextSibling = nextSibling->getChildEntry(gIOPowerPlane);
- if ( nextSibling != aNode ) { // non-ancestor of driver gets
- addPowerChild((IOService *)nextSibling); // plexus as parent
- }
- }
- }
- siblingIterator->release();
- }
- processSiblings((IOService *)nextParent); // do the same thing to this parent
- }
- }
- }
-}
-
-
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-// processChildren
-//
-// Now invent the need for paging services: alter our children's arrays
-// to show that they need paging.
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-
-void IOPMPagingPlexus::processChildren ( void )
-{
- OSIterator * childIterator;
- IOPowerConnection * nextChildNub;
- IORegistryEntry * nextChild;
- IOService * child;
- unsigned int i;
-
- childIterator = getChildIterator(gIOPowerPlane);
-
- if ( childIterator ) {
- while ( (nextChild = (IORegistryEntry *)(childIterator->getNextObject())) ) {
- if ( (nextChildNub = OSDynamicCast(IOPowerConnection,nextChild)) ) {
- child = (IOService *)nextChild->getChildEntry(gIOPowerPlane);
- if ( child->pm_vars->theControllingDriver ) {
- for ( i = 1; i < child->pm_vars->theNumberOfPowerStates; i++ ) {
- child->pm_vars->thePowerStates[i].inputPowerRequirement |= IOPMPagingAvailable;
- }
- }
- if ( child->pm_vars->myCurrentState ) {
- nextChildNub->setDesiredDomainState(kIOPlexusPowerStateCount-1);
- }
- }
- }
- childIterator->release();
- }
-}
projects / apple / xnu.git / blobdiff