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

/*
 * Copyright (c) 1998-2003 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
 * 
 * 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. 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_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,
                            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++)
        kernel_upl_abort(dataP->u[i], 0);

    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
d7e50217 A	1	/*
	2	* Copyright (c) 1998-2003 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
	7	*
	8	* This file contains Original Code and/or Modifications of Original Code
	9	* as defined in and that are subject to the Apple Public Source License
	10	* Version 2.0 (the 'License'). You may not use this file except in
	11	* compliance with the License. Please obtain a copy of the License at
	12	* http://www.opensource.apple.com/apsl/ and read it before using this
	13	* file.
	14	*
	15	* The Original Code and all software distributed under the License are
	16	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	17	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	18	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	19	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	20	* Please see the License for the specific language governing rights and
	21	* limitations under the License.
	22	*
	23	* @APPLE_LICENSE_HEADER_END@
	24	*/
	25	#include <IOKit/IOLib.h>
	26	#include <IOKit/IOMapper.h>
	27	#include <libkern/c++/OSData.h>
	28
	29	#define super IOService
	30	OSDefineMetaClassAndAbstractStructors(IOMapper, IOService);
	31
	32	OSMetaClassDefineReservedUnused(IOMapper, 0);
	33	OSMetaClassDefineReservedUnused(IOMapper, 1);
	34	OSMetaClassDefineReservedUnused(IOMapper, 2);
	35	OSMetaClassDefineReservedUnused(IOMapper, 3);
	36	OSMetaClassDefineReservedUnused(IOMapper, 4);
	37	OSMetaClassDefineReservedUnused(IOMapper, 5);
	38	OSMetaClassDefineReservedUnused(IOMapper, 6);
	39	OSMetaClassDefineReservedUnused(IOMapper, 7);
	40	OSMetaClassDefineReservedUnused(IOMapper, 8);
	41	OSMetaClassDefineReservedUnused(IOMapper, 9);
	42	OSMetaClassDefineReservedUnused(IOMapper, 10);
	43	OSMetaClassDefineReservedUnused(IOMapper, 11);
	44	OSMetaClassDefineReservedUnused(IOMapper, 12);
	45	OSMetaClassDefineReservedUnused(IOMapper, 13);
	46	OSMetaClassDefineReservedUnused(IOMapper, 14);
	47	OSMetaClassDefineReservedUnused(IOMapper, 15);
	48
	49	IOMapper * IOMapper::gSystem = (IOMapper *) IOMapper::kUnknown;
	50
	51	class IOMapperLock {
	52	IOLock *fWaitLock;
	53	public:
	54	IOMapperLock() { fWaitLock = IOLockAlloc(); };
	55	~IOMapperLock() { IOLockFree(fWaitLock); };
	56
	57	void lock() { IOLockLock(fWaitLock); };
	58	void unlock() { IOLockUnlock(fWaitLock); };
	59	void sleep(void *event) { IOLockSleep(fWaitLock, event, THREAD_UNINT); };
	60	void wakeup(void *event) { IOLockWakeup(fWaitLock, event, false); };
	61	};
	62
	63	static IOMapperLock sMapperLock;
	64
65	bool IOMapper::start(IOService *provider)
66	{
67	if (!super::start(provider))
68	return false;
69
70	if (!initHardware(provider))
71	return false;
72
73	if (fIsSystem) {
74	sMapperLock.lock();
75	IOMapper::gSystem = this;
76	sMapperLock.wakeup(&IOMapper::gSystem);
77	sMapperLock.unlock();
78	}
79
80	return true;
81	}
82
83	bool IOMapper::allocTable(IOByteCount size)
84	{
85	assert(!fTable);
86
87	fTableSize = size;
88	fTableHandle = NewARTTable(size, &fTable, &fTablePhys);
89	return fTableHandle != 0;
90	}
91
92	void IOMapper::free()
93	{
94	if (fTableHandle) {
95	FreeARTTable(fTableHandle, fTableSize);
96	fTableHandle = 0;
97	}
98
99	super::free();
100	}
101
102	void IOMapper::setMapperRequired(bool hasMapper)
103	{
104	if (hasMapper)
105	IOMapper::gSystem = (IOMapper *) kHasMapper;
106	else {
107	sMapperLock.lock();
108	IOMapper::gSystem = (IOMapper *) kNoMapper;
109	sMapperLock.unlock();
110	sMapperLock.wakeup(&IOMapper::gSystem);
111	}
112	}
113
114	void IOMapper::waitForSystemMapper()
115	{
116	sMapperLock.lock();
117	while ((vm_address_t) IOMapper::gSystem & kWaitMask)
118	sMapperLock.sleep(&IOMapper::gSystem);
119	sMapperLock.unlock();
120	}
121
122	void IOMapper::iovmInsert(ppnum_t addr, IOItemCount offset,
123	ppnum_t *pageList, IOItemCount pageCount)
124	{
125	while (pageCount--)
126	iovmInsert(addr, offset++, *pageList++);
127	}
128
129	void IOMapper::iovmInsert(ppnum_t addr, IOItemCount offset,
130	upl_page_info_t *pageList, IOItemCount pageCount)
131	{
132	for (IOItemCount i = 0; i < pageCount; i++)
133	iovmInsert(addr, offset + i, pageList[i].phys_addr);
134	}
135
136	struct ARTTableData {
137	void *v;
138	upl_t u[0];
139	};
140	#define getARTDataP(data) ((ARTTableData *) (data)->getBytesNoCopy())
141
142	OSData *
143	IOMapper::NewARTTable(IOByteCount size,
144	void ** virtAddrP, ppnum_t *physAddrP)
145	{
146	OSData *ret;
147	kern_return_t kr;
148	vm_address_t startUpl;
149	ARTTableData *dataP;
150	unsigned int dataSize;
151	upl_page_info_t *pl = 0;
152
153	// Each UPL can deal with about one meg at the moment
154	size = round_page_32(size);
155	dataSize = sizeof(ARTTableData) + sizeof(upl_t) * size / (1024 * 1024);
156	ret = OSData::withCapacity(dataSize);
157	if (!ret)
158	return 0;
159
160	// Append 0's to the buffer, in-other-words reset to nulls.
161	ret->appendBytes(NULL, sizeof(ARTTableData));
162	dataP = getARTDataP(ret);
163
164	kr = kmem_alloc_contig(kernel_map, &startUpl, size, PAGE_MASK, 0);
165	if (kr)
166	return 0;
167
168	dataP->v = (void *) startUpl;
169
170	do {
171	upl_t iopl;
172	int upl_flags = UPL_SET_INTERNAL \| UPL_SET_LITE
173	\| UPL_SET_IO_WIRE \| UPL_COPYOUT_FROM;
174	vm_size_t iopl_size = size;
175
176	kr = vm_map_get_upl(kernel_map,
177	startUpl,
178	&iopl_size,
179	&iopl,
180	0,
181	0,
182	&upl_flags,
183	0);
184	if (kr) {
185	panic("IOMapper:vm_map_get_upl returned 0x%x\n");
186	goto bail;
187	}
188
189	if (!ret->appendBytes(&iopl, sizeof(upl_t)))
190	goto bail;
191
192	startUpl += iopl_size;
193	size -= iopl_size;
194	} while(size);
195
196	// Need to re-establish the dataP as the OSData may have grown.
197	dataP = getARTDataP(ret);
198
199	// Now grab the page entry of the first page and get its phys addr
200	pl = UPL_GET_INTERNAL_PAGE_LIST(dataP->u[0]);
201	*physAddrP = pl->phys_addr;
202	*virtAddrP = dataP->v;
203
204	return ret;
205
206	bail:
207	FreeARTTable(ret, size);
208	return 0;
209	}
210
211	void IOMapper::FreeARTTable(OSData *artHandle, IOByteCount size)
212	{
213	assert(artHandle);
214
215	ARTTableData *dataP = getARTDataP(artHandle);
216
217	int numupls = ((artHandle->getLength() - sizeof(*dataP)) / sizeof(upl_t));
218	for (int i = 0; i < numupls; i++)
219	kernel_upl_abort(dataP->u[i], 0);
220
221	if (dataP->v) {
222	size = round_page_32(size);
223	kmem_free(kernel_map, (vm_address_t) dataP->v, size);
224	}
225	artHandle->release();
226	}
227
228	__BEGIN_DECLS
229
230	// These are C accessors to the system mapper for non-IOKit clients
231	ppnum_t IOMapperIOVMAlloc(unsigned pages)
232	{
233	IOMapper::checkForSystemMapper();
234
235	if (IOMapper::gSystem)
236	return IOMapper::gSystem->iovmAlloc((IOItemCount) pages);
237	else
238	return 0;
239	}
240
241	void IOMapperIOVMFree(ppnum_t addr, unsigned pages)
242	{
243	if (IOMapper::gSystem)
244	IOMapper::gSystem->iovmFree(addr, (IOItemCount) pages);
245	}
246
247	ppnum_t IOMapperInsertPage(ppnum_t addr, unsigned offset, ppnum_t page)
248	{
249	if (IOMapper::gSystem) {
250	IOMapper::gSystem->iovmInsert(addr, (IOItemCount) offset, page);
251	return addr + offset;
252	}
253	else
254	return page;
255	}
256
257	void IOMapperInsertPPNPages(ppnum_t addr, unsigned offset,
258	ppnum_t *pageList, unsigned pageCount)
259	{
260	if (!IOMapper::gSystem)
261	panic("IOMapperInsertPPNPages no system mapper");
262	else
263	assert(!((vm_address_t) IOMapper::gSystem & 3));
264
265	IOMapper::gSystem->
266	iovmInsert(addr, (IOItemCount) offset, pageList, pageCount);
267	}
268
269	void IOMapperInsertUPLPages(ppnum_t addr, unsigned offset,
270	upl_page_info_t *pageList, unsigned pageCount)
271	{
272	if (!IOMapper::gSystem)
273	panic("IOMapperInsertUPLPages no system mapper");
274	else
275	assert(!((vm_address_t) IOMapper::gSystem & 3));
276
277	IOMapper::gSystem->iovmInsert(addr,
278	(IOItemCount) offset,
279	pageList,
280	(IOItemCount) pageCount);
281	}
282
283	/////////////////////////////////////////////////////////////////////////////
284	//
285	//
286	// IOLib.h APIs
287	//
288	//
289	/////////////////////////////////////////////////////////////////////////////
290
291	#include <machine/machine_routines.h>
292
293	UInt8 IOMappedRead8(IOPhysicalAddress address)
294	{
295	IOMapper::checkForSystemMapper();
296
297	if (IOMapper::gSystem) {
298	addr64_t addr = IOMapper::gSystem->mapAddr(address);
299	return (UInt8) ml_phys_read_byte_64(addr);
300	}
301	else
302	return (UInt8) ml_phys_read_byte((vm_offset_t) address);
303	}
304
305	UInt16 IOMappedRead16(IOPhysicalAddress address)
306	{
307	IOMapper::checkForSystemMapper();
308
309	if (IOMapper::gSystem) {
310	addr64_t addr = IOMapper::gSystem->mapAddr(address);
311	return (UInt16) ml_phys_read_half_64(addr);
312	}
313	else
314	return (UInt16) ml_phys_read_half((vm_offset_t) address);
315	}
316
317	UInt32 IOMappedRead32(IOPhysicalAddress address)
318	{
319	IOMapper::checkForSystemMapper();
320
321	if (IOMapper::gSystem) {
322	addr64_t addr = IOMapper::gSystem->mapAddr(address);
323	return (UInt32) ml_phys_read_word_64(addr);
324	}
325	else
326	return (UInt32) ml_phys_read_word((vm_offset_t) address);
327	}
328
329	UInt64 IOMappedRead64(IOPhysicalAddress address)
330	{
331	IOMapper::checkForSystemMapper();
332
333	if (IOMapper::gSystem) {
334	addr64_t addr = IOMapper::gSystem->mapAddr(address);
335	return (UInt64) ml_phys_read_double_64(addr);
336	}
337	else
338	return (UInt64) ml_phys_read_double((vm_offset_t) address);
339	}
340
341	void IOMappedWrite8(IOPhysicalAddress address, UInt8 value)
342	{
343	IOMapper::checkForSystemMapper();
344
345	if (IOMapper::gSystem) {
346	addr64_t addr = IOMapper::gSystem->mapAddr(address);
347	ml_phys_write_byte_64(addr, value);
348	}
349	else
350	ml_phys_write_byte((vm_offset_t) address, value);
351	}
352
353	void IOMappedWrite16(IOPhysicalAddress address, UInt16 value)
354	{
355	IOMapper::checkForSystemMapper();
356
357	if (IOMapper::gSystem) {
358	addr64_t addr = IOMapper::gSystem->mapAddr(address);
359	ml_phys_write_half_64(addr, value);
360	}
361	else
362	ml_phys_write_half((vm_offset_t) address, value);
363	}
364
365	void IOMappedWrite32(IOPhysicalAddress address, UInt32 value)
366	{
367	IOMapper::checkForSystemMapper();
368
369	if (IOMapper::gSystem) {
370	addr64_t addr = IOMapper::gSystem->mapAddr(address);
371	ml_phys_write_word_64(addr, value);
372	}
373	else
374	ml_phys_write_word((vm_offset_t) address, value);
375	}
376
377	void IOMappedWrite64(IOPhysicalAddress address, UInt64 value)
378	{
379	IOMapper::checkForSystemMapper();
380
381	if (IOMapper::gSystem) {
382	addr64_t addr = IOMapper::gSystem->mapAddr(address);
383	ml_phys_write_double_64(addr, value);
384	}
385	else
386	ml_phys_write_double((vm_offset_t) address, value);
387	}
388
389	__END_DECLS