C++ IOMemoryMap::getPhysicalAddress方法代码示例

IOBufferMemoryDescriptor* MemoryDmaAlloc(UInt32 buf_size, dma_addr_t *phys_add, void *virt_add)
{
	IOBufferMemoryDescriptor *memBuffer;
	void *virt_address;
	dma_addr_t phys_address;
	IOMemoryMap *memMap;
	
	memBuffer = IOBufferMemoryDescriptor::inTaskWithOptions(kernel_task,
						kIODirectionOutIn | kIOMemoryPhysicallyContiguous | \
						kIOMemoryAutoPrepare | kIOMapInhibitCache, buf_size, \
						PAGE_SIZE);

	if (memBuffer == NULL) {
		//IOLog("Memory Allocation failed - RLC");

		return NULL;
	}

	memMap = memBuffer->map();

	if (memMap == NULL) {
		//IOLog("mapping failed\n");
		memBuffer->release();
		memBuffer = NULL;
		
		return NULL;	
	}

	phys_address = memMap->getPhysicalAddress();

	virt_address = (void *)memMap->getVirtualAddress();

	if (virt_address == NULL || phys_address == NULL) {
		memMap->release();
		memBuffer->release();
		memBuffer = NULL;
		
		return NULL;
	}

	*phys_add = phys_address;
	*(IOVirtualAddress*)virt_add = (IOVirtualAddress)virt_address;
	memMap->release();

	return memBuffer;
}

bool AppleSamsungSerialDeviceSync::start(IOService *provider) {
    IOMemoryMap* memoryMap;
    uint32_t uartBase;
    
    if(!provider) {
        panic("provider should not be null");
    }
    
    memoryMap = provider->mapDeviceMemoryWithIndex(0);
    if(!memoryMap) {
        panic("failed to get physical device memory map");
    }
    
    uartBase = memoryMap->getPhysicalAddress();
    
    SERIAL_LOG("Detected uart at PA:0x%08x\n",  uartBase);
    
    memoryMap->release();
    
    registerService();

    return true;
}

//	----------------------------------------------------------------------------------------------------
IODBDMAChannelRegisters *	PlatformInterfaceDBDMA_Mapped::GetOutputChannelRegistersVirtualAddress ( IOService * dbdmaProvider ) 
{
	IOMemoryMap *				map;
	IOService *					parentOfParent;
	
	debugIOLog (3,  "+ PlatformInterfaceDBDMA_Mapped::GetOutputChannelRegistersVirtualAddress ( %p )", dbdmaProvider );
	FailIf ( NULL == dbdmaProvider, Exit );
	debugIOLog (3,  "  i2s-x name is %s", dbdmaProvider->getName() );
	parentOfParent = (IOService*)dbdmaProvider->getParentEntry ( gIODTPlane );
	FailIf ( NULL == parentOfParent, Exit );
	debugIOLog (3,  "  parent of %s is %s", dbdmaProvider->getName(), parentOfParent->getName() );
	map = parentOfParent->mapDeviceMemoryWithIndex ( AppleDBDMAAudio::kDBDMAOutputIndex );
	FailIf ( NULL == map, Exit );
	mIOBaseDMAOutput = (IODBDMAChannelRegisters *) map->getVirtualAddress();
	debugIOLog (3,  "  mIOBaseDMAOutput virtual address %p is at physical address %p", mIOBaseDMAOutput, (void*)map->getPhysicalAddress() );
	if ( NULL == mIOBaseDMAOutput )
	{
		debugIOLog (1,  "  PlatformInterfaceDBDMA_Mapped::GetOutputChannelRegistersVirtualAddress IODBDMAChannelRegisters NOT IN VIRTUAL SPACE" );
	}
Exit:
	debugIOLog (3,  "- PlatformInterfaceDBDMA_Mapped::GetOutputChannelRegistersVirtualAddress ( %p ) returns %p", dbdmaProvider, mIOBaseDMAOutput );
	return mIOBaseDMAOutput;
}

//	----------------------------------------------------------------------------------------------------
bool	PlatformInterfaceDBDMA_Mapped::init ( IOService* device, AppleOnboardAudio* provider, UInt32 inDBDMADeviceIndex )
{
	bool					result = FALSE;
	IOService* 				theService;
	IORegistryEntry			*macio;
	IORegistryEntry			*gpio;
	IORegistryEntry			*i2s;
	IORegistryEntry			*i2sParent;
	IOMemoryMap				*map;

	debugIOLog ( 3, "+ PlatformInterfaceDBDMA_Mapped::init ( %p, %p, %d )", device, provider, inDBDMADeviceIndex );
	
	FailIf ( NULL == provider, Exit );
	FailIf ( NULL == device, Exit );

	result = super::init ( device, provider, inDBDMADeviceIndex );
	if ( result ) 
	{
		mKeyLargoService = IOService::waitForService ( IOService::serviceMatching ( "KeyLargo" ) );
		debugIOLog ( 3, "  sound's name is %s",  ( (IORegistryEntry*)device)->getName () );
		
		i2s =  ( ( IORegistryEntry*)device)->getParentEntry ( gIODTPlane );
		FailWithAction ( 0 == i2s, result = false, Exit );
		debugIOLog ( 3, "  parent name is '%s'", i2s->getName () );

		if ( 0 == strcmp ( "i2s-a", i2s->getName () ) )
		{
			mI2SInterfaceNumber = kUseI2SCell0;
		}
		else if ( 0 == strcmp ( "i2s-b", i2s->getName () ) ) 
		{
			mI2SInterfaceNumber = kUseI2SCell1;
		}
		else if ( 0 == strcmp ( "i2s-c", i2s->getName () ) )
		{
			mI2SInterfaceNumber = kUseI2SCell2;
		}
		else if ( 0 == strcmp ( "i2s-d", i2s->getName () ) )
		{
			mI2SInterfaceNumber = kUseI2SCell3;
		}
		else if ( 0 == strcmp ( "i2s-e", i2s->getName () ) )
		{
			mI2SInterfaceNumber = kUseI2SCell4;
		}
		else if ( 0 == strcmp ( "i2s-f", i2s->getName () ) )
		{
			mI2SInterfaceNumber = kUseI2SCell5;
		}
		else if ( 0 == strcmp ( "i2s-g", i2s->getName () ) )
		{
			mI2SInterfaceNumber = kUseI2SCell6;
		}
		else if ( 0 == strcmp ( "i2s-h", i2s->getName () ) )
		{
			mI2SInterfaceNumber = kUseI2SCell7;
		}
		debugIOLog ( 5, "  mI2SInterfaceNumber = %d", mI2SInterfaceNumber );
		
		i2sParent = i2s->getParentEntry ( gIODTPlane );
		FailWithAction ( 0 == i2sParent, result = false, Exit );
		debugIOLog ( 3, "  parent name of '%s' is %s", i2s->getName (), i2sParent->getName () );

		macio = i2sParent->getParentEntry ( gIODTPlane );
		FailWithAction ( 0 == macio, result = false, Exit );
		debugIOLog ( 3, "  macio name is %s", macio->getName () );
		
		gpio = macio->childFromPath ( kGPIODTEntry, gIODTPlane);
		FailWithAction ( !gpio, result = false, Exit);
		debugIOLog ( 3, "  gpio name is %s", gpio->getName () );

		theService = ( OSDynamicCast ( IOService, i2s ) );
		FailWithAction ( !theService, result = false, Exit );

		map = theService->mapDeviceMemoryWithIndex ( inDBDMADeviceIndex );
		FailWithAction ( 0 == map, result = false, Exit );

		// cache the config space
		mSoundConfigSpace = (UInt8 *)map->getPhysicalAddress();

		// sets the clock base address figuring out which I2S cell we're on
		if ((((UInt32)mSoundConfigSpace ^ kI2S0BaseOffset) & 0x0001FFFF) == 0) 
		{
			//	[3060321]	ioBaseAddress is required by this object in order to enable the target
			//				I2S I/O Module for which this object is to service.  The I2S I/O Module
			//				enable occurs through the configuration registers which reside in the
			//				first block of ioBase.		rbm		2 Oct 2002
			mIOBaseAddress = (void *)((UInt32)mSoundConfigSpace - kI2S0BaseOffset);
			mIOBaseAddressMemory = IODeviceMemory::withRange ((IOPhysicalAddress)((UInt8 *)mSoundConfigSpace - kI2S0BaseOffset), 256);
			mI2SInterfaceNumber = kUseI2SCell0;
		}
		else if ((((UInt32)mSoundConfigSpace ^ kI2S1BaseOffset) & 0x0001FFFF) == 0) 
		{
			//	[3060321]	ioBaseAddress is required by this object in order to enable the target
			//				I2S I/O Module for which this object is to service.  The I2S I/O Module
			//				enable occurs through the configuration registers which reside in the
			//				first block of ioBase.		rbm		2 Oct 2002
			mIOBaseAddress = (void *)((UInt32)mSoundConfigSpace - kI2S1BaseOffset);
			mIOBaseAddressMemory = IODeviceMemory::withRange ((IOPhysicalAddress)((UInt8 *)mSoundConfigSpace - kI2S1BaseOffset), 256);
//.........这里部分代码省略.........

// --------------------------------------------------------------------------
bool AudioI2SControl::init(AudioI2SInfo *theInfo) 
{    
	UInt32				tempFcr1;
	
    debugIOLog (3, "+ AudioI2SControl::init");
	
    if(!super::init())
        return(false);
		
	if ( NULL == theInfo ) { return ( false ); }		//	[3060321]	rbm	1 Oct 2002
	
    IOMemoryMap 		*map = theInfo->map ;

	switch ( theInfo->i2sSerialFormat ) {				//	[3060321]	rbm	2 Oct 2002	begin {
		case kSerialFormatSony:							//	fall through to kSerialFormatSiliLabs
		case kSerialFormat64x:							//	fall through to kSerialFormatSiliLabs
		case kSerialFormat32x:							//	fall through to kSerialFormatSiliLabs
		case kSerialFormatDAV:							//	fall through to kSerialFormatSiliLabs
		case kSerialFormatSiliLabs:
			serialFormat = theInfo->i2sSerialFormat;	//	set the format as requested
			break;
		default:
			debugIOLog (3,  "### WRONG I2S Serial Format" );
			serialFormat = kSerialFormatSony;			//	force a legal value here...
			break;
	}													//	[3060321]	rbm	1 Oct 2002	} end
	
    // cache the config space
	soundConfigSpace = (UInt8 *)map->getPhysicalAddress();

    // sets the clock base address figuring out which I2S cell we're on
    if ((((UInt32)soundConfigSpace ^ kI2S0BaseOffset) & 0x0001FFFF) == 0) 
    {
		//	[3060321]	ioBaseAddress is required by this object in order to enable the target
		//				I2S I/O Module for which this object is to service.  The I2S I/O Module
		//				enable occurs through the configuration registers which reside in the
		//				first block of ioBase.		rbm		2 Oct 2002
		ioBaseAddress = (void *)((UInt32)soundConfigSpace - kI2S0BaseOffset);
		ioBaseAddressMemory = IODeviceMemory::withRange ((IOPhysicalAddress)((UInt8 *)soundConfigSpace - kI2S0BaseOffset), 256);
        i2SInterfaceNumber = kUseI2SCell0;
    }
    else if ((((UInt32)soundConfigSpace ^ kI2S1BaseOffset) & 0x0001FFFF) == 0) 
    {
		//	[3060321]	ioBaseAddress is required by this object in order to enable the target
		//				I2S I/O Module for which this object is to service.  The I2S I/O Module
		//				enable occurs through the configuration registers which reside in the
		//				first block of ioBase.		rbm		2 Oct 2002
		ioBaseAddress = (void *)((UInt32)soundConfigSpace - kI2S1BaseOffset);
		ioBaseAddressMemory = IODeviceMemory::withRange ((IOPhysicalAddress)((UInt8 *)soundConfigSpace - kI2S1BaseOffset), 256);
        i2SInterfaceNumber = kUseI2SCell1;
    }
    else 
    {
        debugIOLog (3, "AudioI2SControl::init ERROR: unable to setup ioBaseAddress and i2SInterfaceNumber");
    }

	//
	//	There are three sections of memory mapped I/O that are directly accessed by the Apple02Audio.  These
	//	include the GPIOs, I2S DMA Channel Registers and I2S control registers.  They fall within the memory map 
	//	as follows:
	//	~                              ~
	//	|______________________________|
	//	|                              |
	//	|         I2S Control          |
	//	|______________________________|	<-	soundConfigSpace = ioBase + i2s0BaseOffset ...OR... ioBase + i2s1BaseOffset
	//	|                              |
	//	~                              ~
	//	~                              ~
	//	|______________________________|
	//	|                              |
	//	|       I2S DMA Channel        |
	//	|______________________________|	<-	i2sDMA = ioBase + i2s0_DMA ...OR... ioBase + i2s1_DMA
	//	|                              |
	//	~                              ~
	//	~                              ~
	//	|______________________________|
	//	|            FCRs              |
	//	|            GPIO              |	<-	gpio = ioBase + gpioOffsetAddress
	//	|         ExtIntGPIO           |	<-	fcr = ioBase + fcrOffsetAddress
	//	|______________________________|	<-	ioConfigurationBaseAddress
	//	|                              |
	//	~                              ~
	//
	//	The I2S DMA Channel is mapped in by the Apple02DBDMAAudioDMAEngine.  Only the I2S control registers are 
	//	mapped in by the AudioI2SControl.  The Apple I/O Configuration Space (i.e. FCRs, GPIOs and ExtIntGPIOs)
	//	are mapped in by the subclass of Apple02Audio.  The FCRs must also be mapped in by the AudioI2SControl
	//	object as the init method must enable the I2S I/O Module for which the AudioI2SControl object is
	//	being instantiated for.
	//
	
	//	Map the I2S configuration registers
	if (kUseI2SCell0 == i2SInterfaceNumber) {
		ioI2SBaseAddressMemory = IODeviceMemory::withRange ((IOPhysicalAddress)((UInt8 *)soundConfigSpace), kI2S_IO_CONFIGURATION_SIZE);
	} else {
		ioI2SBaseAddressMemory = IODeviceMemory::withRange ((IOPhysicalAddress)((UInt8 *)soundConfigSpace), kI2S_IO_CONFIGURATION_SIZE);
	}
	if (NULL != ioI2SBaseAddressMemory) {
		i2sBaseAddress = (void *)ioI2SBaseAddressMemory->map()->getVirtualAddress();
	} else {
//.........这里部分代码省略.........

bool AppleSamplePCI::start( IOService * provider )
{
    IOMemoryDescriptor *	mem;
    IOMemoryMap *		map;

    IOLog("AppleSamplePCI::start\n");

    if( !super::start( provider ))
        return( false );

    /*
     * Our provider class is specified in the driver property table
     * as IOPCIDevice, so the provider must be of that class.
     * The assert is just to make absolutely sure for debugging.
     */

    assert( OSDynamicCast( IOPCIDevice, provider ));
    fPCIDevice = (IOPCIDevice *) provider;

    /*
     * Enable memory response from the card
     */
    fPCIDevice->setMemoryEnable( true );


    /*
     * Log some info about the device
     */

    /* print all the device's memory ranges */
    for( UInt32 index = 0;
         index < fPCIDevice->getDeviceMemoryCount();
         index++ ) {

        mem = fPCIDevice->getDeviceMemoryWithIndex( index );
        assert( mem );
        IOLog("Range[%ld] %08lx:%08lx\n", index,
              mem->getPhysicalAddress(), mem->getLength());
    }

    /* look up a range based on its config space base address register */
    mem = fPCIDevice->getDeviceMemoryWithRegister(
                                  kIOPCIConfigBaseAddress0 );
    if( mem )
        IOLog("[email protected]%x %08lx:%08lx\n", kIOPCIConfigBaseAddress0,
                mem->getPhysicalAddress(), mem->getLength());

    /* map a range based on its config space base address register,
     * this is how the driver gets access to its memory mapped registers
     * the getVirtualAddress() method returns a kernel virtual address
     * for the register mapping */
    
    map = fPCIDevice->mapDeviceMemoryWithRegister(
                                  kIOPCIConfigBaseAddress0 );
    if( map ) {
        IOLog("[email protected]%x (%08lx) mapped to kernel virtual address %08x\n",
                kIOPCIConfigBaseAddress0,
                map->getPhysicalAddress(),
                map->getVirtualAddress());
        /* release the map object, and the mapping itself */
        map->release();
    }

    /* read a config space register */
    IOLog("Config [email protected]%x = %08lx\n", kIOPCIConfigCommand,
          fPCIDevice->configRead32(kIOPCIConfigCommand) );

    // construct a memory descriptor for a buffer below the 4Gb line &
    // so addressable by 32 bit DMA. This could be used for a 
    // DMA program buffer for example

    IOBufferMemoryDescriptor * bmd = 
	IOBufferMemoryDescriptor::inTaskWithPhysicalMask(
				// task to hold the memory
				kernel_task, 
				// options
				kIOMemoryPhysicallyContiguous, 
				// size
				64*1024, 
				// physicalMask - 32 bit addressable and page aligned
				0x00000000FFFFF000ULL);

    if (bmd) {
	generateDMAAddresses(bmd);
    } else {
	IOLog("IOBufferMemoryDescriptor::inTaskWithPhysicalMask failed\n");
    }
    fLowMemory = bmd;
    
    /* publish ourselves so clients can find us */
    registerService();

    return( true );
}