[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>

#include "IOCopyMapper.h"

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

#define super IOService
OSDefineMetaClassAndAbstractStructors(IOMapper, IOService);

OSMetaClassDefineReservedUsed(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);
}

OSData * IOMapper::
NewARTTable(IOByteCount size, void ** virtAddrP, ppnum_t *physAddrP)
{
    if (!virtAddrP || !physAddrP)
	return 0;

    kern_return_t kr;
    vm_address_t address;

    size = round_page_32(size);
    kr = kmem_alloc_contig(kernel_map, &address, size, PAGE_MASK, 0);
    if (kr)
        return 0;

    ppnum_t pagenum = pmap_find_phys(kernel_pmap, (addr64_t) address);
    if (pagenum)
	*physAddrP = pagenum;
    else {
	FreeARTTable((OSData *) address, size);
	address = 0;
    }

    *virtAddrP = (void *) address;

    return (OSData *) address;
}

void IOMapper::FreeARTTable(OSData *artHandle, IOByteCount size)
{
    vm_address_t address = (vm_address_t) artHandle;

    size = round_page_32(size);
    kmem_free(kernel_map, address, size);	// Just panic if address is 0
}

bool IOMapper::getBypassMask(addr64_t *maskP) const
{
    return false;
}

__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);
}

mach_vm_address_t IOMallocPhysical(mach_vm_size_t size, mach_vm_address_t mask)
{
    mach_vm_address_t address = 0;
    if (gIOCopyMapper)
    {
	address = ptoa_64(gIOCopyMapper->iovmAlloc(atop_64(round_page(size))));
    }

    return (address);
}

void IOFreePhysical(mach_vm_address_t address, mach_vm_size_t size)
{
    if (gIOCopyMapper)
    {
	gIOCopyMapper->iovmFree(atop_64(address), atop_64(round_page(size)));
    }
}


__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
0c530ab8 A	26	#include "IOCopyMapper.h"
	27
	28	__BEGIN_DECLS
	29	extern ppnum_t pmap_find_phys(pmap_t pmap, addr64_t va);
	30	__END_DECLS
	31
55e303ae A	32	#define super IOService
	33	OSDefineMetaClassAndAbstractStructors(IOMapper, IOService);
	34
0c530ab8	35	OSMetaClassDefineReservedUsed(IOMapper, 0);
55e303ae A	36	OSMetaClassDefineReservedUnused(IOMapper, 1);
	37	OSMetaClassDefineReservedUnused(IOMapper, 2);
	38	OSMetaClassDefineReservedUnused(IOMapper, 3);
	39	OSMetaClassDefineReservedUnused(IOMapper, 4);
	40	OSMetaClassDefineReservedUnused(IOMapper, 5);
	41	OSMetaClassDefineReservedUnused(IOMapper, 6);
	42	OSMetaClassDefineReservedUnused(IOMapper, 7);
	43	OSMetaClassDefineReservedUnused(IOMapper, 8);
	44	OSMetaClassDefineReservedUnused(IOMapper, 9);
	45	OSMetaClassDefineReservedUnused(IOMapper, 10);
	46	OSMetaClassDefineReservedUnused(IOMapper, 11);
	47	OSMetaClassDefineReservedUnused(IOMapper, 12);
	48	OSMetaClassDefineReservedUnused(IOMapper, 13);
	49	OSMetaClassDefineReservedUnused(IOMapper, 14);
	50	OSMetaClassDefineReservedUnused(IOMapper, 15);
	51
	52	IOMapper * IOMapper::gSystem = (IOMapper *) IOMapper::kUnknown;
	53
	54	class IOMapperLock {
	55	IOLock *fWaitLock;
	56	public:
	57	IOMapperLock() { fWaitLock = IOLockAlloc(); };
	58	~IOMapperLock() { IOLockFree(fWaitLock); };
	59
	60	void lock() { IOLockLock(fWaitLock); };
	61	void unlock() { IOLockUnlock(fWaitLock); };
	62	void sleep(void *event) { IOLockSleep(fWaitLock, event, THREAD_UNINT); };
	63	void wakeup(void *event) { IOLockWakeup(fWaitLock, event, false); };
	64	};
	65
	66	static IOMapperLock sMapperLock;
	67
	68	bool IOMapper::start(IOService *provider)
	69	{
	70	if (!super::start(provider))
	71	return false;
	72
	73	if (!initHardware(provider))
	74	return false;
	75
	76	if (fIsSystem) {
	77	sMapperLock.lock();
	78	IOMapper::gSystem = this;
	79	sMapperLock.wakeup(&IOMapper::gSystem);
	80	sMapperLock.unlock();
	81	}
	82
	83	return true;
	84	}
	85
	86	bool IOMapper::allocTable(IOByteCount size)
	87	{
	88	assert(!fTable);
	89
	90	fTableSize = size;
	91	fTableHandle = NewARTTable(size, &fTable, &fTablePhys);
	92	return fTableHandle != 0;
	93	}
	94
	95	void IOMapper::free()
	96	{
	97	if (fTableHandle) {
	98	FreeARTTable(fTableHandle, fTableSize);
	99	fTableHandle = 0;
100	}
101
102	super::free();
103	}
104
105	void IOMapper::setMapperRequired(bool hasMapper)
106	{
107	if (hasMapper)
108	IOMapper::gSystem = (IOMapper *) kHasMapper;
109	else {
110	sMapperLock.lock();
111	IOMapper::gSystem = (IOMapper *) kNoMapper;
112	sMapperLock.unlock();
113	sMapperLock.wakeup(&IOMapper::gSystem);
114	}
115	}
116
117	void IOMapper::waitForSystemMapper()
118	{
119	sMapperLock.lock();
120	while ((vm_address_t) IOMapper::gSystem & kWaitMask)
121	sMapperLock.sleep(&IOMapper::gSystem);
122	sMapperLock.unlock();
123	}
124
125	void IOMapper::iovmInsert(ppnum_t addr, IOItemCount offset,
126	ppnum_t *pageList, IOItemCount pageCount)
127	{
128	while (pageCount--)
129	iovmInsert(addr, offset++, *pageList++);
130	}
131
132	void IOMapper::iovmInsert(ppnum_t addr, IOItemCount offset,
133	upl_page_info_t *pageList, IOItemCount pageCount)
134	{
135	for (IOItemCount i = 0; i < pageCount; i++)
136	iovmInsert(addr, offset + i, pageList[i].phys_addr);
137	}
138
0c530ab8 A	139	OSData * IOMapper::
0c530ab8 A	140	NewARTTable(IOByteCount size, void ** virtAddrP, ppnum_t *physAddrP)
6601e61a	141	{
0c530ab8 A	142	if (!virtAddrP \|\| !physAddrP)
	143	return 0;
	144
55e303ae	145	kern_return_t kr;
0c530ab8	146	vm_address_t address;
55e303ae	147
55e303ae	148	size = round_page_32(size);
0c530ab8 A	149	kr = kmem_alloc_contig(kernel_map, &address, size, PAGE_MASK, 0);
0c530ab8 A	150	if (kr)
55e303ae A	151	return 0;
55e303ae A	152
0c530ab8 A	153	ppnum_t pagenum = pmap_find_phys(kernel_pmap, (addr64_t) address);
	154	if (pagenum)
	155	*physAddrP = pagenum;
	156	else {
	157	FreeARTTable((OSData *) address, size);
	158	address = 0;
	159	}
55e303ae	160
0c530ab8	161	virtAddrP = (void ) address;
55e303ae	162
0c530ab8	163	return (OSData *) address;
55e303ae A	164	}
	165
	166	void IOMapper::FreeARTTable(OSData *artHandle, IOByteCount size)
	167	{
0c530ab8	168	vm_address_t address = (vm_address_t) artHandle;
21362eb3	169
0c530ab8 A	170	size = round_page_32(size);
	171	kmem_free(kernel_map, address, size); // Just panic if address is 0
	172	}
6601e61a	173
0c530ab8 A	174	bool IOMapper::getBypassMask(addr64_t *maskP) const
	175	{
	176	return false;
55e303ae A	177	}
	178
	179	__BEGIN_DECLS
	180
	181	// These are C accessors to the system mapper for non-IOKit clients
	182	ppnum_t IOMapperIOVMAlloc(unsigned pages)
	183	{
	184	IOMapper::checkForSystemMapper();
	185
	186	if (IOMapper::gSystem)
	187	return IOMapper::gSystem->iovmAlloc((IOItemCount) pages);
	188	else
	189	return 0;
	190	}
	191
	192	void IOMapperIOVMFree(ppnum_t addr, unsigned pages)
	193	{
	194	if (IOMapper::gSystem)
	195	IOMapper::gSystem->iovmFree(addr, (IOItemCount) pages);
	196	}
	197
	198	ppnum_t IOMapperInsertPage(ppnum_t addr, unsigned offset, ppnum_t page)
	199	{
	200	if (IOMapper::gSystem) {
	201	IOMapper::gSystem->iovmInsert(addr, (IOItemCount) offset, page);
	202	return addr + offset;
	203	}
	204	else
	205	return page;
	206	}
	207
	208	void IOMapperInsertPPNPages(ppnum_t addr, unsigned offset,
	209	ppnum_t *pageList, unsigned pageCount)
	210	{
	211	if (!IOMapper::gSystem)
	212	panic("IOMapperInsertPPNPages no system mapper");
	213	else
	214	assert(!((vm_address_t) IOMapper::gSystem & 3));
	215
	216	IOMapper::gSystem->
	217	iovmInsert(addr, (IOItemCount) offset, pageList, pageCount);
	218	}
	219
	220	void IOMapperInsertUPLPages(ppnum_t addr, unsigned offset,
	221	upl_page_info_t *pageList, unsigned pageCount)
	222	{
	223	if (!IOMapper::gSystem)
	224	panic("IOMapperInsertUPLPages no system mapper");
	225	else
	226	assert(!((vm_address_t) IOMapper::gSystem & 3));
	227
	228	IOMapper::gSystem->iovmInsert(addr,
	229	(IOItemCount) offset,
	230	pageList,
	231	(IOItemCount) pageCount);
	232	}
	233
	234	/////////////////////////////////////////////////////////////////////////////
	235	//
	236	//
	237	// IOLib.h APIs
	238	//
	239	//
	240	/////////////////////////////////////////////////////////////////////////////
241
242	#include <machine/machine_routines.h>
243
244	UInt8 IOMappedRead8(IOPhysicalAddress address)
245	{
246	IOMapper::checkForSystemMapper();
247
248	if (IOMapper::gSystem) {
249	addr64_t addr = IOMapper::gSystem->mapAddr(address);
250	return (UInt8) ml_phys_read_byte_64(addr);
251	}
252	else
253	return (UInt8) ml_phys_read_byte((vm_offset_t) address);
254	}
255
256	UInt16 IOMappedRead16(IOPhysicalAddress address)
257	{
258	IOMapper::checkForSystemMapper();
259
260	if (IOMapper::gSystem) {
261	addr64_t addr = IOMapper::gSystem->mapAddr(address);
262	return (UInt16) ml_phys_read_half_64(addr);
263	}
264	else
265	return (UInt16) ml_phys_read_half((vm_offset_t) address);
266	}
267
268	UInt32 IOMappedRead32(IOPhysicalAddress address)
269	{
270	IOMapper::checkForSystemMapper();
271
272	if (IOMapper::gSystem) {
273	addr64_t addr = IOMapper::gSystem->mapAddr(address);
274	return (UInt32) ml_phys_read_word_64(addr);
275	}
276	else
277	return (UInt32) ml_phys_read_word((vm_offset_t) address);
278	}
279
280	UInt64 IOMappedRead64(IOPhysicalAddress address)
281	{
282	IOMapper::checkForSystemMapper();
283
284	if (IOMapper::gSystem) {
285	addr64_t addr = IOMapper::gSystem->mapAddr(address);
286	return (UInt64) ml_phys_read_double_64(addr);
287	}
288	else
289	return (UInt64) ml_phys_read_double((vm_offset_t) address);
290	}
291
292	void IOMappedWrite8(IOPhysicalAddress address, UInt8 value)
293	{
294	IOMapper::checkForSystemMapper();
295
296	if (IOMapper::gSystem) {
297	addr64_t addr = IOMapper::gSystem->mapAddr(address);
298	ml_phys_write_byte_64(addr, value);
299	}
300	else
301	ml_phys_write_byte((vm_offset_t) address, value);
302	}
303
304	void IOMappedWrite16(IOPhysicalAddress address, UInt16 value)
305	{
306	IOMapper::checkForSystemMapper();
307
308	if (IOMapper::gSystem) {
309	addr64_t addr = IOMapper::gSystem->mapAddr(address);
310	ml_phys_write_half_64(addr, value);
311	}
312	else
313	ml_phys_write_half((vm_offset_t) address, value);
314	}
315
316	void IOMappedWrite32(IOPhysicalAddress address, UInt32 value)
317	{
318	IOMapper::checkForSystemMapper();
319
320	if (IOMapper::gSystem) {
321	addr64_t addr = IOMapper::gSystem->mapAddr(address);
322	ml_phys_write_word_64(addr, value);
323	}
324	else
325	ml_phys_write_word((vm_offset_t) address, value);
326	}
327
328	void IOMappedWrite64(IOPhysicalAddress address, UInt64 value)
329	{
330	IOMapper::checkForSystemMapper();
331
332	if (IOMapper::gSystem) {
333	addr64_t addr = IOMapper::gSystem->mapAddr(address);
334	ml_phys_write_double_64(addr, value);
335	}
336	else
337	ml_phys_write_double((vm_offset_t) address, value);
338	}
339
0c530ab8 A	340	mach_vm_address_t IOMallocPhysical(mach_vm_size_t size, mach_vm_address_t mask)
	341	{
	342	mach_vm_address_t address = 0;
	343	if (gIOCopyMapper)
	344	{
	345	address = ptoa_64(gIOCopyMapper->iovmAlloc(atop_64(round_page(size))));
	346	}
	347
	348	return (address);
	349	}
	350
	351	void IOFreePhysical(mach_vm_address_t address, mach_vm_size_t size)
	352	{
	353	if (gIOCopyMapper)
	354	{
	355	gIOCopyMapper->iovmFree(atop_64(address), atop_64(round_page(size)));
	356	}
	357	}
	358
	359
55e303ae	360	__END_DECLS