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

/*
 * Copyright (c) 1998-2004 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@
 */
#include <IOKit/IOLib.h>
#include <IOKit/IOMapper.h>
#include <libkern/c++/OSData.h>

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

    if (!initHardware(provider))
        return false;

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

    return true;
}

bool IOMapper::allocTable(IOByteCount size)
{
    assert(!fTable);

    fTableSize = size;
    fTableHandle = NewARTTable(size, &fTable, &fTablePhys);
    return fTableHandle != 0;
}

void IOMapper::free()
{
    if (fTableHandle) {
        FreeARTTable(fTableHandle, fTableSize);
        fTableHandle = 0;
    }

    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 ((vm_address_t) IOMapper::gSystem & kWaitMask)
        sMapperLock.sleep(&IOMapper::gSystem);
    sMapperLock.unlock();
}

void IOMapper::iovmInsert(ppnum_t addr, IOItemCount offset,
                            ppnum_t *pageList, IOItemCount pageCount)
{
    while (pageCount--)
        iovmInsert(addr, offset++, *pageList++);
}

void IOMapper::iovmInsert(ppnum_t addr, IOItemCount offset,
                            upl_page_info_t *pageList, IOItemCount pageCount)
{
    for (IOItemCount i = 0; i < pageCount; i++)
        iovmInsert(addr, offset + i, pageList[i].phys_addr);
}

struct ARTTableData {
    void *v;
    upl_t u[0];
};
#define getARTDataP(data) ((ARTTableData *) (data)->getBytesNoCopy())

OSData *
IOMapper::NewARTTable(IOByteCount size,
                      void ** virtAddrP, ppnum_t *physAddrP)
{
    OSData *ret;
    kern_return_t kr;
    vm_address_t startUpl;
    ARTTableData *dataP;
    unsigned int dataSize;
    upl_page_info_t *pl = 0;

    // Each UPL can deal with about one meg at the moment
    size = round_page_32(size);
    dataSize = sizeof(ARTTableData) + sizeof(upl_t) * size / (1024 * 1024);
    ret = OSData::withCapacity(dataSize);
    if (!ret)
        return 0;

    // Append 0's to the buffer, in-other-words reset to nulls.
    ret->appendBytes(NULL, sizeof(ARTTableData));
    dataP = getARTDataP(ret);

    kr = kmem_alloc_contig(kernel_map, &startUpl, size, PAGE_MASK, 0);
    if (kr)
        return 0;

    dataP->v = (void *) startUpl;

    do {
        upl_t iopl;
        int upl_flags = UPL_SET_INTERNAL | UPL_SET_LITE
                      | UPL_SET_IO_WIRE | UPL_COPYOUT_FROM;
        vm_size_t iopl_size = size;

        kr = vm_map_get_upl(kernel_map,
                            (vm_map_offset_t)startUpl,
                            &iopl_size,
                            &iopl,
                            0,
                            0,
                            &upl_flags,
                            0);
        if (kr) {
            panic("IOMapper:vm_map_get_upl returned 0x%x\n");
            goto bail;
        }

        if (!ret->appendBytes(&iopl, sizeof(upl_t)))
            goto bail;
            
        startUpl += iopl_size;
        size -= iopl_size;
    } while(size);

    // Need to re-establish the dataP as the OSData may have grown.
    dataP = getARTDataP(ret);

    // Now grab the page entry of the first page and get its phys addr
    pl = UPL_GET_INTERNAL_PAGE_LIST(dataP->u[0]);
    *physAddrP = pl->phys_addr;
    *virtAddrP = dataP->v;

    return ret;

bail:
    FreeARTTable(ret, size);
    return 0;
}

void IOMapper::FreeARTTable(OSData *artHandle, IOByteCount size)
{
    assert(artHandle);

    ARTTableData *dataP = getARTDataP(artHandle);

    int numupls = ((artHandle->getLength() - sizeof(*dataP)) / sizeof(upl_t));
    for (int i = 0; i < numupls; i++) {
        upl_abort(dataP->u[i], 0);
        upl_deallocate(dataP->u[i]);
    }

    if (dataP->v) {
        size = round_page_32(size);
        kmem_free(kernel_map, (vm_address_t) dataP->v, size);
    }
    artHandle->release();
}

__BEGIN_DECLS

// These are C accessors to the system mapper for non-IOKit clients
ppnum_t IOMapperIOVMAlloc(unsigned pages)
{
    IOMapper::checkForSystemMapper();

    if (IOMapper::gSystem)
        return IOMapper::gSystem->iovmAlloc((IOItemCount) pages);
    else
        return 0;
}

void IOMapperIOVMFree(ppnum_t addr, unsigned pages)
{
    if (IOMapper::gSystem)
        IOMapper::gSystem->iovmFree(addr, (IOItemCount) pages);
}

ppnum_t IOMapperInsertPage(ppnum_t addr, unsigned offset, ppnum_t page)
{
    if (IOMapper::gSystem) {
        IOMapper::gSystem->iovmInsert(addr, (IOItemCount) offset, page);
        return addr + offset;
    }
    else
        return page;
}

void IOMapperInsertPPNPages(ppnum_t addr, unsigned offset,
                            ppnum_t *pageList, unsigned pageCount)
{
    if (!IOMapper::gSystem)
        panic("IOMapperInsertPPNPages no system mapper");
    else
        assert(!((vm_address_t) IOMapper::gSystem & 3));

    IOMapper::gSystem->
        iovmInsert(addr, (IOItemCount) offset, pageList, pageCount);
}

void IOMapperInsertUPLPages(ppnum_t addr, unsigned offset,
                            upl_page_info_t *pageList, unsigned pageCount)
{
    if (!IOMapper::gSystem)
        panic("IOMapperInsertUPLPages no system mapper");
    else
        assert(!((vm_address_t) IOMapper::gSystem & 3));

    IOMapper::gSystem->iovmInsert(addr,
                                 (IOItemCount) offset,
                                  pageList,
                                  (IOItemCount) pageCount);
}

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

#include <machine/machine_routines.h>

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

    if (IOMapper::gSystem) {
        addr64_t addr = IOMapper::gSystem->mapAddr(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->mapAddr(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->mapAddr(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->mapAddr(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->mapAddr(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->mapAddr(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->mapAddr(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->mapAddr(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	/*
91447636	2	* Copyright (c) 1998-2004 Apple Computer, Inc. All rights reserved.
55e303ae	3	*
6601e61a	4	* @APPLE_LICENSE_HEADER_START@
55e303ae	5	*
6601e61a A	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
8f6c56a5	11	*
6601e61a A	12	* This Original Code and all software distributed under the License are
6601e61a A	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
8f6c56a5 A	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
8f6c56a5 A	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
6601e61a A	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
8f6c56a5	19	*
6601e61a	20	* @APPLE_LICENSE_HEADER_END@
55e303ae A	21	*/
	22	#include <IOKit/IOLib.h>
	23	#include <IOKit/IOMapper.h>
	24	#include <libkern/c++/OSData.h>
	25
	26	#define super IOService
	27	OSDefineMetaClassAndAbstractStructors(IOMapper, IOService);
	28
6601e61a	29	OSMetaClassDefineReservedUnused(IOMapper, 0);
55e303ae A	30	OSMetaClassDefineReservedUnused(IOMapper, 1);
	31	OSMetaClassDefineReservedUnused(IOMapper, 2);
	32	OSMetaClassDefineReservedUnused(IOMapper, 3);
	33	OSMetaClassDefineReservedUnused(IOMapper, 4);
	34	OSMetaClassDefineReservedUnused(IOMapper, 5);
	35	OSMetaClassDefineReservedUnused(IOMapper, 6);
	36	OSMetaClassDefineReservedUnused(IOMapper, 7);
	37	OSMetaClassDefineReservedUnused(IOMapper, 8);
	38	OSMetaClassDefineReservedUnused(IOMapper, 9);
	39	OSMetaClassDefineReservedUnused(IOMapper, 10);
	40	OSMetaClassDefineReservedUnused(IOMapper, 11);
	41	OSMetaClassDefineReservedUnused(IOMapper, 12);
	42	OSMetaClassDefineReservedUnused(IOMapper, 13);
	43	OSMetaClassDefineReservedUnused(IOMapper, 14);
	44	OSMetaClassDefineReservedUnused(IOMapper, 15);
	45
	46	IOMapper * IOMapper::gSystem = (IOMapper *) IOMapper::kUnknown;
	47
	48	class IOMapperLock {
	49	IOLock *fWaitLock;
	50	public:
	51	IOMapperLock() { fWaitLock = IOLockAlloc(); };
	52	~IOMapperLock() { IOLockFree(fWaitLock); };
	53
	54	void lock() { IOLockLock(fWaitLock); };
	55	void unlock() { IOLockUnlock(fWaitLock); };
	56	void sleep(void *event) { IOLockSleep(fWaitLock, event, THREAD_UNINT); };
	57	void wakeup(void *event) { IOLockWakeup(fWaitLock, event, false); };
	58	};
	59
	60	static IOMapperLock sMapperLock;
	61
	62	bool IOMapper::start(IOService *provider)
	63	{
	64	if (!super::start(provider))
	65	return false;
	66
	67	if (!initHardware(provider))
	68	return false;
	69
	70	if (fIsSystem) {
	71	sMapperLock.lock();
	72	IOMapper::gSystem = this;
	73	sMapperLock.wakeup(&IOMapper::gSystem);
	74	sMapperLock.unlock();
	75	}
	76
	77	return true;
	78	}
	79
	80	bool IOMapper::allocTable(IOByteCount size)
	81	{
	82	assert(!fTable);
	83
	84	fTableSize = size;
	85	fTableHandle = NewARTTable(size, &fTable, &fTablePhys);
	86	return fTableHandle != 0;
	87	}
	88
	89	void IOMapper::free()
	90	{
	91	if (fTableHandle) {
	92	FreeARTTable(fTableHandle, fTableSize);
	93	fTableHandle = 0;
94	}
95
96	super::free();
97	}
98
99	void IOMapper::setMapperRequired(bool hasMapper)
100	{
101	if (hasMapper)
102	IOMapper::gSystem = (IOMapper *) kHasMapper;
103	else {
104	sMapperLock.lock();
105	IOMapper::gSystem = (IOMapper *) kNoMapper;
106	sMapperLock.unlock();
107	sMapperLock.wakeup(&IOMapper::gSystem);
108	}
109	}
110
111	void IOMapper::waitForSystemMapper()
112	{
113	sMapperLock.lock();
114	while ((vm_address_t) IOMapper::gSystem & kWaitMask)
115	sMapperLock.sleep(&IOMapper::gSystem);
116	sMapperLock.unlock();
117	}
118
119	void IOMapper::iovmInsert(ppnum_t addr, IOItemCount offset,
120	ppnum_t *pageList, IOItemCount pageCount)
121	{
122	while (pageCount--)
123	iovmInsert(addr, offset++, *pageList++);
124	}
125
126	void IOMapper::iovmInsert(ppnum_t addr, IOItemCount offset,
127	upl_page_info_t *pageList, IOItemCount pageCount)
128	{
129	for (IOItemCount i = 0; i < pageCount; i++)
130	iovmInsert(addr, offset + i, pageList[i].phys_addr);
131	}
132
6601e61a A	133	struct ARTTableData {
	134	void *v;
	135	upl_t u[0];
	136	};
	137	#define getARTDataP(data) ((ARTTableData *) (data)->getBytesNoCopy())
4452a7af	138
6601e61a A	139	OSData *
	140	IOMapper::NewARTTable(IOByteCount size,
	141	void ** virtAddrP, ppnum_t *physAddrP)
	142	{
	143	OSData *ret;
55e303ae	144	kern_return_t kr;
6601e61a A	145	vm_address_t startUpl;
	146	ARTTableData *dataP;
	147	unsigned int dataSize;
	148	upl_page_info_t *pl = 0;
55e303ae	149
6601e61a	150	// Each UPL can deal with about one meg at the moment
55e303ae	151	size = round_page_32(size);
6601e61a A	152	dataSize = sizeof(ARTTableData) + sizeof(upl_t) * size / (1024 * 1024);
	153	ret = OSData::withCapacity(dataSize);
	154	if (!ret)
55e303ae A	155	return 0;
55e303ae A	156
6601e61a A	157	// Append 0's to the buffer, in-other-words reset to nulls.
	158	ret->appendBytes(NULL, sizeof(ARTTableData));
	159	dataP = getARTDataP(ret);
55e303ae	160
6601e61a A	161	kr = kmem_alloc_contig(kernel_map, &startUpl, size, PAGE_MASK, 0);
	162	if (kr)
	163	return 0;
55e303ae	164
6601e61a A	165	dataP->v = (void *) startUpl;
	166
	167	do {
	168	upl_t iopl;
	169	int upl_flags = UPL_SET_INTERNAL \| UPL_SET_LITE
	170	\| UPL_SET_IO_WIRE \| UPL_COPYOUT_FROM;
	171	vm_size_t iopl_size = size;
	172
	173	kr = vm_map_get_upl(kernel_map,
	174	(vm_map_offset_t)startUpl,
	175	&iopl_size,
	176	&iopl,
	177	0,
	178	0,
	179	&upl_flags,
	180	0);
	181	if (kr) {
	182	panic("IOMapper:vm_map_get_upl returned 0x%x\n");
	183	goto bail;
	184	}
	185
	186	if (!ret->appendBytes(&iopl, sizeof(upl_t)))
	187	goto bail;
	188
	189	startUpl += iopl_size;
	190	size -= iopl_size;
	191	} while(size);
	192
	193	// Need to re-establish the dataP as the OSData may have grown.
	194	dataP = getARTDataP(ret);
	195
	196	// Now grab the page entry of the first page and get its phys addr
	197	pl = UPL_GET_INTERNAL_PAGE_LIST(dataP->u[0]);
	198	*physAddrP = pl->phys_addr;
	199	*virtAddrP = dataP->v;
	200
	201	return ret;
	202
	203	bail:
	204	FreeARTTable(ret, size);
	205	return 0;
55e303ae A	206	}
	207
	208	void IOMapper::FreeARTTable(OSData *artHandle, IOByteCount size)
	209	{
6601e61a	210	assert(artHandle);
8f6c56a5	211
6601e61a	212	ARTTableData *dataP = getARTDataP(artHandle);
21362eb3	213
6601e61a A	214	int numupls = ((artHandle->getLength() - sizeof(*dataP)) / sizeof(upl_t));
	215	for (int i = 0; i < numupls; i++) {
	216	upl_abort(dataP->u[i], 0);
	217	upl_deallocate(dataP->u[i]);
	218	}
	219
	220	if (dataP->v) {
	221	size = round_page_32(size);
	222	kmem_free(kernel_map, (vm_address_t) dataP->v, size);
	223	}
	224	artHandle->release();
55e303ae A	225	}
	226
	227	__BEGIN_DECLS
	228
	229	// These are C accessors to the system mapper for non-IOKit clients
	230	ppnum_t IOMapperIOVMAlloc(unsigned pages)
	231	{
	232	IOMapper::checkForSystemMapper();
	233
	234	if (IOMapper::gSystem)
	235	return IOMapper::gSystem->iovmAlloc((IOItemCount) pages);
	236	else
	237	return 0;
	238	}
	239
	240	void IOMapperIOVMFree(ppnum_t addr, unsigned pages)
	241	{
	242	if (IOMapper::gSystem)
	243	IOMapper::gSystem->iovmFree(addr, (IOItemCount) pages);
	244	}
	245
	246	ppnum_t IOMapperInsertPage(ppnum_t addr, unsigned offset, ppnum_t page)
	247	{
	248	if (IOMapper::gSystem) {
	249	IOMapper::gSystem->iovmInsert(addr, (IOItemCount) offset, page);
	250	return addr + offset;
	251	}
	252	else
	253	return page;
	254	}
	255
	256	void IOMapperInsertPPNPages(ppnum_t addr, unsigned offset,
	257	ppnum_t *pageList, unsigned pageCount)
	258	{
	259	if (!IOMapper::gSystem)
	260	panic("IOMapperInsertPPNPages no system mapper");
	261	else
	262	assert(!((vm_address_t) IOMapper::gSystem & 3));
	263
	264	IOMapper::gSystem->
	265	iovmInsert(addr, (IOItemCount) offset, pageList, pageCount);
	266	}
	267
	268	void IOMapperInsertUPLPages(ppnum_t addr, unsigned offset,
	269	upl_page_info_t *pageList, unsigned pageCount)
	270	{
	271	if (!IOMapper::gSystem)
	272	panic("IOMapperInsertUPLPages no system mapper");
	273	else
	274	assert(!((vm_address_t) IOMapper::gSystem & 3));
	275
	276	IOMapper::gSystem->iovmInsert(addr,
	277	(IOItemCount) offset,
	278	pageList,
	279	(IOItemCount) pageCount);
	280	}
	281
	282	/////////////////////////////////////////////////////////////////////////////
	283	//
	284	//
	285	// IOLib.h APIs
	286	//
	287	//
	288	/////////////////////////////////////////////////////////////////////////////
289
290	#include <machine/machine_routines.h>
291
292	UInt8 IOMappedRead8(IOPhysicalAddress address)
293	{
294	IOMapper::checkForSystemMapper();
295
296	if (IOMapper::gSystem) {
297	addr64_t addr = IOMapper::gSystem->mapAddr(address);
298	return (UInt8) ml_phys_read_byte_64(addr);
299	}
300	else
301	return (UInt8) ml_phys_read_byte((vm_offset_t) address);
302	}
303
304	UInt16 IOMappedRead16(IOPhysicalAddress address)
305	{
306	IOMapper::checkForSystemMapper();
307
308	if (IOMapper::gSystem) {
309	addr64_t addr = IOMapper::gSystem->mapAddr(address);
310	return (UInt16) ml_phys_read_half_64(addr);
311	}
312	else
313	return (UInt16) ml_phys_read_half((vm_offset_t) address);
314	}
315
316	UInt32 IOMappedRead32(IOPhysicalAddress address)
317	{
318	IOMapper::checkForSystemMapper();
319
320	if (IOMapper::gSystem) {
321	addr64_t addr = IOMapper::gSystem->mapAddr(address);
322	return (UInt32) ml_phys_read_word_64(addr);
323	}
324	else
325	return (UInt32) ml_phys_read_word((vm_offset_t) address);
326	}
327
328	UInt64 IOMappedRead64(IOPhysicalAddress address)
329	{
330	IOMapper::checkForSystemMapper();
331
332	if (IOMapper::gSystem) {
333	addr64_t addr = IOMapper::gSystem->mapAddr(address);
334	return (UInt64) ml_phys_read_double_64(addr);
335	}
336	else
337	return (UInt64) ml_phys_read_double((vm_offset_t) address);
338	}
339
340	void IOMappedWrite8(IOPhysicalAddress address, UInt8 value)
341	{
342	IOMapper::checkForSystemMapper();
343
344	if (IOMapper::gSystem) {
345	addr64_t addr = IOMapper::gSystem->mapAddr(address);
346	ml_phys_write_byte_64(addr, value);
347	}
348	else
349	ml_phys_write_byte((vm_offset_t) address, value);
350	}
351
352	void IOMappedWrite16(IOPhysicalAddress address, UInt16 value)
353	{
354	IOMapper::checkForSystemMapper();
355
356	if (IOMapper::gSystem) {
357	addr64_t addr = IOMapper::gSystem->mapAddr(address);
358	ml_phys_write_half_64(addr, value);
359	}
360	else
361	ml_phys_write_half((vm_offset_t) address, value);
362	}
363
364	void IOMappedWrite32(IOPhysicalAddress address, UInt32 value)
365	{
366	IOMapper::checkForSystemMapper();
367
368	if (IOMapper::gSystem) {
369	addr64_t addr = IOMapper::gSystem->mapAddr(address);
370	ml_phys_write_word_64(addr, value);
371	}
372	else
373	ml_phys_write_word((vm_offset_t) address, value);
374	}
375
376	void IOMappedWrite64(IOPhysicalAddress address, UInt64 value)
377	{
378	IOMapper::checkForSystemMapper();
379
380	if (IOMapper::gSystem) {
381	addr64_t addr = IOMapper::gSystem->mapAddr(address);
382	ml_phys_write_double_64(addr, value);
383	}
384	else
385	ml_phys_write_double((vm_offset_t) address, value);
386	}
387
388	__END_DECLS