[apple/xnu.git] / iokit / Kernel / IOMapper.cpp

/*
 * Copyright (c) 1998-2016 Apple Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 *
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 *
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 *
 * The 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, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
#include <IOKit/IOLib.h>
#include <IOKit/IOMapper.h>
#include <IOKit/IODMACommand.h>
#include <libkern/c++/OSData.h>
#include <libkern/OSDebug.h>
#include <mach_debug/zone_info.h>
#include "IOKitKernelInternal.h"

__BEGIN_DECLS
extern ppnum_t pmap_find_phys(pmap_t pmap, addr64_t va);
__END_DECLS

#define super IOService
OSDefineMetaClassAndAbstractStructors(IOMapper, IOService);

OSMetaClassDefineReservedUnused(IOMapper, 0);
OSMetaClassDefineReservedUnused(IOMapper, 1);
OSMetaClassDefineReservedUnused(IOMapper, 2);
OSMetaClassDefineReservedUnused(IOMapper, 3);
OSMetaClassDefineReservedUnused(IOMapper, 4);
OSMetaClassDefineReservedUnused(IOMapper, 5);
OSMetaClassDefineReservedUnused(IOMapper, 6);
OSMetaClassDefineReservedUnused(IOMapper, 7);
OSMetaClassDefineReservedUnused(IOMapper, 8);
OSMetaClassDefineReservedUnused(IOMapper, 9);
OSMetaClassDefineReservedUnused(IOMapper, 10);
OSMetaClassDefineReservedUnused(IOMapper, 11);
OSMetaClassDefineReservedUnused(IOMapper, 12);
OSMetaClassDefineReservedUnused(IOMapper, 13);
OSMetaClassDefineReservedUnused(IOMapper, 14);
OSMetaClassDefineReservedUnused(IOMapper, 15);

IOMapper * IOMapper::gSystem = (IOMapper *) IOMapper::kUnknown;

class IOMapperLock {
	IOLock *fWaitLock;
public:
	IOMapperLock()
	{
		fWaitLock = IOLockAlloc();
	}
	~IOMapperLock()
	{
		IOLockFree(fWaitLock);
	}

	void
	lock()
	{
		IOLockLock(fWaitLock);
	}
	void
	unlock()
	{
		IOLockUnlock(fWaitLock);
	}
	void
	sleep(void *event)
	{
		IOLockSleep(fWaitLock, event, THREAD_UNINT);
	}
	void
	wakeup(void *event)
	{
		IOLockWakeup(fWaitLock, event, false);
	}
};

static IOMapperLock sMapperLock;

bool
IOMapper::start(IOService *provider)
{
	OSObject * obj;
	if (!super::start(provider)) {
		return false;
	}

	if (!initHardware(provider)) {
		return false;
	}

	fPageSize = getPageSize();

	if (fIsSystem) {
		sMapperLock.lock();
		IOMapper::gSystem = this;
		sMapperLock.wakeup(&IOMapper::gSystem);
		sMapperLock.unlock();
	}

	if (provider) {
		obj = provider->getProperty("iommu-id");
		if (!obj) {
			obj = provider->getProperty("AAPL,phandle");
		}
		if (obj) {
			setProperty(gIOMapperIDKey, obj);
		}
	}
	return true;
}

void
IOMapper::free()
{
	super::free();
}

void
IOMapper::setMapperRequired(bool hasMapper)
{
	if (hasMapper) {
		IOMapper::gSystem = (IOMapper *) kHasMapper;
	} else {
		sMapperLock.lock();
		IOMapper::gSystem = (IOMapper *) kNoMapper;
		sMapperLock.unlock();
		sMapperLock.wakeup(&IOMapper::gSystem);
	}
}

void
IOMapper::waitForSystemMapper()
{
	sMapperLock.lock();
	while ((uintptr_t) IOMapper::gSystem & kWaitMask) {
		OSReportWithBacktrace("waitForSystemMapper");
		sMapperLock.sleep(&IOMapper::gSystem);
	}
	sMapperLock.unlock();
}

IOMapper *
IOMapper::copyMapperForDevice(IOService * device)
{
	return copyMapperForDeviceWithIndex(device, 0);
}

IOMapper *
IOMapper::copyMapperForDeviceWithIndex(IOService * device, unsigned int index)
{
	OSData *data;
	OSObject * obj;
	IOMapper * mapper = NULL;
	OSDictionary * matching;

	obj = device->copyProperty("iommu-parent");
	if (!obj) {
		return NULL;
	}

	if ((mapper = OSDynamicCast(IOMapper, obj))) {
		goto found;
	}

	if ((data = OSDynamicCast(OSData, obj))) {
		if (index >= data->getLength() / sizeof(UInt32)) {
			goto done;
		}

		data = OSData::withBytesNoCopy((UInt32 *)data->getBytesNoCopy() + index, sizeof(UInt32));
		if (!data) {
			goto done;
		}

		matching = IOService::propertyMatching(gIOMapperIDKey, data);
		data->release();
	} else {
		matching = IOService::propertyMatching(gIOMapperIDKey, obj);
	}

	if (matching) {
		mapper = OSDynamicCast(IOMapper, IOService::waitForMatchingService(matching));
		matching->release();
	}

done:
	if (obj) {
		obj->release();
	}
found:
	if (mapper) {
		if (!mapper->fAllocName) {
			char name[MACH_ZONE_NAME_MAX_LEN];
			char kmodname[KMOD_MAX_NAME];
			vm_tag_t tag;
			uint32_t kmodid;

			tag = IOMemoryTag(kernel_map);
			if (!(kmodid = vm_tag_get_kext(tag, &kmodname[0], KMOD_MAX_NAME))) {
				snprintf(kmodname, sizeof(kmodname), "%d", tag);
			}
			snprintf(name, sizeof(name), "%s.DMA.%s", kmodname, device->getName());
			mapper->fAllocName = kern_allocation_name_allocate(name, 16);
		}
	}

	return mapper;
}

__BEGIN_DECLS

// These are C accessors to the system mapper for non-IOKit clients
ppnum_t
IOMapperIOVMAlloc(unsigned pages)
{
	IOReturn ret;
	uint64_t dmaAddress, dmaLength;

	IOMapper::checkForSystemMapper();

	ret = kIOReturnUnsupported;
	if (IOMapper::gSystem) {
		ret = IOMapper::gSystem->iovmMapMemory(
			NULL, 0, ptoa_64(pages),
			(kIODMAMapReadAccess | kIODMAMapWriteAccess),
			NULL, NULL, NULL,
			&dmaAddress, &dmaLength);
	}

	if (kIOReturnSuccess == ret) {
		return atop_64(dmaAddress);
	}
	return 0;
}

void
IOMapperIOVMFree(ppnum_t addr, unsigned pages)
{
	if (IOMapper::gSystem) {
		IOMapper::gSystem->iovmUnmapMemory(NULL, NULL, ptoa_64(addr), ptoa_64(pages));
	}
}

ppnum_t
IOMapperInsertPage(ppnum_t addr, unsigned offset, ppnum_t page)
{
	if (!IOMapper::gSystem) {
		return page;
	}
	if (!addr) {
		panic("!addr");
	}
	IOMapper::gSystem->iovmInsert((kIODMAMapReadAccess | kIODMAMapWriteAccess),
	    ptoa_64(addr), ptoa_64(offset), ptoa_64(page), ptoa_64(1));
	return addr + offset;
}

/////////////////////////////////////////////////////////////////////////////
//
//
//	IOLib.h APIs
//
//
/////////////////////////////////////////////////////////////////////////////

#include <machine/machine_routines.h>

UInt8
IOMappedRead8(IOPhysicalAddress address)
{
	IOMapper::checkForSystemMapper();

	if (IOMapper::gSystem) {
		addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
		return (UInt8) ml_phys_read_byte_64(addr);
	} else {
		return (UInt8) ml_phys_read_byte((vm_offset_t) address);
	}
}

UInt16
IOMappedRead16(IOPhysicalAddress address)
{
	IOMapper::checkForSystemMapper();

	if (IOMapper::gSystem) {
		addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
		return (UInt16) ml_phys_read_half_64(addr);
	} else {
		return (UInt16) ml_phys_read_half((vm_offset_t) address);
	}
}

UInt32
IOMappedRead32(IOPhysicalAddress address)
{
	IOMapper::checkForSystemMapper();

	if (IOMapper::gSystem) {
		addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
		return (UInt32) ml_phys_read_word_64(addr);
	} else {
		return (UInt32) ml_phys_read_word((vm_offset_t) address);
	}
}

UInt64
IOMappedRead64(IOPhysicalAddress address)
{
	IOMapper::checkForSystemMapper();

	if (IOMapper::gSystem) {
		addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
		return (UInt64) ml_phys_read_double_64(addr);
	} else {
		return (UInt64) ml_phys_read_double((vm_offset_t) address);
	}
}

void
IOMappedWrite8(IOPhysicalAddress address, UInt8 value)
{
	IOMapper::checkForSystemMapper();

	if (IOMapper::gSystem) {
		addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
		ml_phys_write_byte_64(addr, value);
	} else {
		ml_phys_write_byte((vm_offset_t) address, value);
	}
}

void
IOMappedWrite16(IOPhysicalAddress address, UInt16 value)
{
	IOMapper::checkForSystemMapper();

	if (IOMapper::gSystem) {
		addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
		ml_phys_write_half_64(addr, value);
	} else {
		ml_phys_write_half((vm_offset_t) address, value);
	}
}

void
IOMappedWrite32(IOPhysicalAddress address, UInt32 value)
{
	IOMapper::checkForSystemMapper();

	if (IOMapper::gSystem) {
		addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
		ml_phys_write_word_64(addr, value);
	} else {
		ml_phys_write_word((vm_offset_t) address, value);
	}
}

void
IOMappedWrite64(IOPhysicalAddress address, UInt64 value)
{
	IOMapper::checkForSystemMapper();

	if (IOMapper::gSystem) {
		addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
		ml_phys_write_double_64(addr, value);
	} else {
		ml_phys_write_double((vm_offset_t) address, value);
	}
}

__END_DECLS
Commit	Line	Data
55e303ae	1	/*
39037602	2	* Copyright (c) 1998-2016 Apple Inc. All rights reserved.
55e303ae	3	*
2d21ac55	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
0a7de745	5	*
2d21ac55 A	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.
0a7de745	14	*
2d21ac55 A	15	* Please obtain a copy of the License at
2d21ac55 A	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
0a7de745	17	*
2d21ac55 A	18	* The Original Code and all software distributed under the License are
2d21ac55 A	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
8f6c56a5 A	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
8f6c56a5 A	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
2d21ac55 A	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.
0a7de745	25	*
2d21ac55	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
55e303ae A	27	*/
	28	#include <IOKit/IOLib.h>
	29	#include <IOKit/IOMapper.h>
b0d623f7	30	#include <IOKit/IODMACommand.h>
55e303ae	31	#include <libkern/c++/OSData.h>
99c3a104	32	#include <libkern/OSDebug.h>
5ba3f43e	33	#include <mach_debug/zone_info.h>
3e170ce0	34	#include "IOKitKernelInternal.h"
55e303ae	35
0c530ab8 A	36	__BEGIN_DECLS
	37	extern ppnum_t pmap_find_phys(pmap_t pmap, addr64_t va);
	38	__END_DECLS
	39
55e303ae A	40	#define super IOService
	41	OSDefineMetaClassAndAbstractStructors(IOMapper, IOService);
	42
3e170ce0 A	43	OSMetaClassDefineReservedUnused(IOMapper, 0);
	44	OSMetaClassDefineReservedUnused(IOMapper, 1);
	45	OSMetaClassDefineReservedUnused(IOMapper, 2);
	46	OSMetaClassDefineReservedUnused(IOMapper, 3);
55e303ae A	47	OSMetaClassDefineReservedUnused(IOMapper, 4);
	48	OSMetaClassDefineReservedUnused(IOMapper, 5);
	49	OSMetaClassDefineReservedUnused(IOMapper, 6);
	50	OSMetaClassDefineReservedUnused(IOMapper, 7);
	51	OSMetaClassDefineReservedUnused(IOMapper, 8);
	52	OSMetaClassDefineReservedUnused(IOMapper, 9);
	53	OSMetaClassDefineReservedUnused(IOMapper, 10);
	54	OSMetaClassDefineReservedUnused(IOMapper, 11);
	55	OSMetaClassDefineReservedUnused(IOMapper, 12);
	56	OSMetaClassDefineReservedUnused(IOMapper, 13);
	57	OSMetaClassDefineReservedUnused(IOMapper, 14);
	58	OSMetaClassDefineReservedUnused(IOMapper, 15);
	59
	60	IOMapper * IOMapper::gSystem = (IOMapper *) IOMapper::kUnknown;
	61
	62	class IOMapperLock {
0a7de745	63	IOLock *fWaitLock;
55e303ae	64	public:
0a7de745 A	65	IOMapperLock()
	66	{
	67	fWaitLock = IOLockAlloc();
	68	}
	69	~IOMapperLock()
	70	{
	71	IOLockFree(fWaitLock);
	72	}
	73
	74	void
	75	lock()
	76	{
	77	IOLockLock(fWaitLock);
	78	}
	79	void
	80	unlock()
	81	{
	82	IOLockUnlock(fWaitLock);
	83	}
	84	void
	85	sleep(void *event)
	86	{
	87	IOLockSleep(fWaitLock, event, THREAD_UNINT);
	88	}
	89	void
	90	wakeup(void *event)
	91	{
	92	IOLockWakeup(fWaitLock, event, false);
	93	}
55e303ae A	94	};
	95
	96	static IOMapperLock sMapperLock;
	97
0a7de745 A	98	bool
0a7de745 A	99	IOMapper::start(IOService *provider)
55e303ae	100	{
0a7de745 A	101	OSObject * obj;
	102	if (!super::start(provider)) {
	103	return false;
	104	}
	105
	106	if (!initHardware(provider)) {
	107	return false;
	108	}
	109
	110	fPageSize = getPageSize();
	111
	112	if (fIsSystem) {
	113	sMapperLock.lock();
	114	IOMapper::gSystem = this;
	115	sMapperLock.wakeup(&IOMapper::gSystem);
	116	sMapperLock.unlock();
	117	}
	118
	119	if (provider) {
	120	obj = provider->getProperty("iommu-id");
	121	if (!obj) {
	122	obj = provider->getProperty("AAPL,phandle");
	123	}
	124	if (obj) {
	125	setProperty(gIOMapperIDKey, obj);
	126	}
	127	}
	128	return true;
55e303ae A	129	}
55e303ae A	130
0a7de745 A	131	void
0a7de745 A	132	IOMapper::free()
55e303ae	133	{
0a7de745	134	super::free();
55e303ae A	135	}
55e303ae A	136
0a7de745 A	137	void
0a7de745 A	138	IOMapper::setMapperRequired(bool hasMapper)
55e303ae	139	{
0a7de745 A	140	if (hasMapper) {
	141	IOMapper::gSystem = (IOMapper *) kHasMapper;
	142	} else {
	143	sMapperLock.lock();
	144	IOMapper::gSystem = (IOMapper *) kNoMapper;
	145	sMapperLock.unlock();
	146	sMapperLock.wakeup(&IOMapper::gSystem);
	147	}
55e303ae A	148	}
55e303ae A	149
0a7de745 A	150	void
0a7de745 A	151	IOMapper::waitForSystemMapper()
55e303ae	152	{
0a7de745 A	153	sMapperLock.lock();
0a7de745 A	154	while ((uintptr_t) IOMapper::gSystem & kWaitMask) {
99c3a104	155	OSReportWithBacktrace("waitForSystemMapper");
0a7de745 A	156	sMapperLock.sleep(&IOMapper::gSystem);
	157	}
	158	sMapperLock.unlock();
55e303ae A	159	}
55e303ae A	160
0a7de745 A	161	IOMapper *
0a7de745 A	162	IOMapper::copyMapperForDevice(IOService * device)
b0d623f7	163	{
0a7de745	164	return copyMapperForDeviceWithIndex(device, 0);
39236c6e A	165	}
39236c6e A	166
0a7de745 A	167	IOMapper *
0a7de745 A	168	IOMapper::copyMapperForDeviceWithIndex(IOService * device, unsigned int index)
39236c6e	169	{
0a7de745 A	170	OSData *data;
	171	OSObject * obj;
	172	IOMapper * mapper = NULL;
	173	OSDictionary * matching;
	174
	175	obj = device->copyProperty("iommu-parent");
	176	if (!obj) {
	177	return NULL;
	178	}
	179
	180	if ((mapper = OSDynamicCast(IOMapper, obj))) {
	181	goto found;
	182	}
	183
	184	if ((data = OSDynamicCast(OSData, obj))) {
	185	if (index >= data->getLength() / sizeof(UInt32)) {
	186	goto done;
	187	}
	188
	189	data = OSData::withBytesNoCopy((UInt32 *)data->getBytesNoCopy() + index, sizeof(UInt32));
	190	if (!data) {
	191	goto done;
	192	}
	193
	194	matching = IOService::propertyMatching(gIOMapperIDKey, data);
	195	data->release();
	196	} else {
	197	matching = IOService::propertyMatching(gIOMapperIDKey, obj);
	198	}
	199
	200	if (matching) {
	201	mapper = OSDynamicCast(IOMapper, IOService::waitForMatchingService(matching));
	202	matching->release();
	203	}
39236c6e A	204
39236c6e A	205	done:
0a7de745 A	206	if (obj) {
	207	obj->release();
	208	}
5ba3f43e	209	found:
0a7de745 A	210	if (mapper) {
	211	if (!mapper->fAllocName) {
	212	char name[MACH_ZONE_NAME_MAX_LEN];
	213	char kmodname[KMOD_MAX_NAME];
	214	vm_tag_t tag;
	215	uint32_t kmodid;
	216
	217	tag = IOMemoryTag(kernel_map);
	218	if (!(kmodid = vm_tag_get_kext(tag, &kmodname[0], KMOD_MAX_NAME))) {
	219	snprintf(kmodname, sizeof(kmodname), "%d", tag);
	220	}
	221	snprintf(name, sizeof(name), "%s.DMA.%s", kmodname, device->getName());
	222	mapper->fAllocName = kern_allocation_name_allocate(name, 16);
	223	}
	224	}
	225
	226	return mapper;
b0d623f7 A	227	}
b0d623f7 A	228
55e303ae A	229	__BEGIN_DECLS
	230
	231	// These are C accessors to the system mapper for non-IOKit clients
0a7de745 A	232	ppnum_t
0a7de745 A	233	IOMapperIOVMAlloc(unsigned pages)
55e303ae	234	{
0a7de745 A	235	IOReturn ret;
	236	uint64_t dmaAddress, dmaLength;
	237
	238	IOMapper::checkForSystemMapper();
	239
	240	ret = kIOReturnUnsupported;
	241	if (IOMapper::gSystem) {
	242	ret = IOMapper::gSystem->iovmMapMemory(
	243	NULL, 0, ptoa_64(pages),
	244	(kIODMAMapReadAccess \| kIODMAMapWriteAccess),
	245	NULL, NULL, NULL,
	246	&dmaAddress, &dmaLength);
	247	}
	248
	249	if (kIOReturnSuccess == ret) {
	250	return atop_64(dmaAddress);
	251	}
	252	return 0;
55e303ae A	253	}
55e303ae A	254
0a7de745 A	255	void
0a7de745 A	256	IOMapperIOVMFree(ppnum_t addr, unsigned pages)
55e303ae	257	{
0a7de745 A	258	if (IOMapper::gSystem) {
	259	IOMapper::gSystem->iovmUnmapMemory(NULL, NULL, ptoa_64(addr), ptoa_64(pages));
	260	}
55e303ae A	261	}
55e303ae A	262
0a7de745 A	263	ppnum_t
0a7de745 A	264	IOMapperInsertPage(ppnum_t addr, unsigned offset, ppnum_t page)
55e303ae	265	{
0a7de745 A	266	if (!IOMapper::gSystem) {
	267	return page;
	268	}
	269	if (!addr) {
	270	panic("!addr");
	271	}
	272	IOMapper::gSystem->iovmInsert((kIODMAMapReadAccess \| kIODMAMapWriteAccess),
	273	ptoa_64(addr), ptoa_64(offset), ptoa_64(page), ptoa_64(1));
	274	return addr + offset;
55e303ae A	275	}
	276
	277	/////////////////////////////////////////////////////////////////////////////
	278	//
	279	//
	280	// IOLib.h APIs
	281	//
	282	//
	283	/////////////////////////////////////////////////////////////////////////////
	284
	285	#include <machine/machine_routines.h>
	286
0a7de745 A	287	UInt8
0a7de745 A	288	IOMappedRead8(IOPhysicalAddress address)
55e303ae	289	{
0a7de745 A	290	IOMapper::checkForSystemMapper();
	291
	292	if (IOMapper::gSystem) {
	293	addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
	294	return (UInt8) ml_phys_read_byte_64(addr);
	295	} else {
	296	return (UInt8) ml_phys_read_byte((vm_offset_t) address);
	297	}
55e303ae A	298	}
55e303ae A	299
0a7de745 A	300	UInt16
0a7de745 A	301	IOMappedRead16(IOPhysicalAddress address)
55e303ae	302	{
0a7de745 A	303	IOMapper::checkForSystemMapper();
	304
	305	if (IOMapper::gSystem) {
	306	addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
	307	return (UInt16) ml_phys_read_half_64(addr);
	308	} else {
	309	return (UInt16) ml_phys_read_half((vm_offset_t) address);
	310	}
55e303ae A	311	}
55e303ae A	312
0a7de745 A	313	UInt32
0a7de745 A	314	IOMappedRead32(IOPhysicalAddress address)
55e303ae	315	{
0a7de745 A	316	IOMapper::checkForSystemMapper();
	317
	318	if (IOMapper::gSystem) {
	319	addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
	320	return (UInt32) ml_phys_read_word_64(addr);
	321	} else {
	322	return (UInt32) ml_phys_read_word((vm_offset_t) address);
	323	}
55e303ae A	324	}
55e303ae A	325
0a7de745 A	326	UInt64
0a7de745 A	327	IOMappedRead64(IOPhysicalAddress address)
55e303ae	328	{
0a7de745 A	329	IOMapper::checkForSystemMapper();
	330
	331	if (IOMapper::gSystem) {
	332	addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
	333	return (UInt64) ml_phys_read_double_64(addr);
	334	} else {
	335	return (UInt64) ml_phys_read_double((vm_offset_t) address);
	336	}
55e303ae A	337	}
55e303ae A	338
0a7de745 A	339	void
0a7de745 A	340	IOMappedWrite8(IOPhysicalAddress address, UInt8 value)
55e303ae	341	{
0a7de745 A	342	IOMapper::checkForSystemMapper();
	343
	344	if (IOMapper::gSystem) {
	345	addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
	346	ml_phys_write_byte_64(addr, value);
	347	} else {
	348	ml_phys_write_byte((vm_offset_t) address, value);
	349	}
55e303ae A	350	}
55e303ae A	351
0a7de745 A	352	void
0a7de745 A	353	IOMappedWrite16(IOPhysicalAddress address, UInt16 value)
55e303ae	354	{
0a7de745 A	355	IOMapper::checkForSystemMapper();
	356
	357	if (IOMapper::gSystem) {
	358	addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
	359	ml_phys_write_half_64(addr, value);
	360	} else {
	361	ml_phys_write_half((vm_offset_t) address, value);
	362	}
55e303ae A	363	}
55e303ae A	364
0a7de745 A	365	void
0a7de745 A	366	IOMappedWrite32(IOPhysicalAddress address, UInt32 value)
55e303ae	367	{
0a7de745 A	368	IOMapper::checkForSystemMapper();
	369
	370	if (IOMapper::gSystem) {
	371	addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
	372	ml_phys_write_word_64(addr, value);
	373	} else {
	374	ml_phys_write_word((vm_offset_t) address, value);
	375	}
55e303ae A	376	}
55e303ae A	377
0a7de745 A	378	void
0a7de745 A	379	IOMappedWrite64(IOPhysicalAddress address, UInt64 value)
55e303ae	380	{
0a7de745 A	381	IOMapper::checkForSystemMapper();
	382
	383	if (IOMapper::gSystem) {
	384	addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
	385	ml_phys_write_double_64(addr, value);
	386	} else {
	387	ml_phys_write_double((vm_offset_t) address, value);
	388	}
55e303ae A	389	}
	390
	391	__END_DECLS