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--- xnu/xnu-1228/iokit/Kernel/IOBufferMemoryDescriptor.cpp
+++ xnu/xnu-3789.41.3/iokit/Kernel/IOBufferMemoryDescriptor.cpp
@@ -25,26 +25,49 @@
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
+
+#define _IOMEMORYDESCRIPTOR_INTERNAL_
+
#include <IOKit/assert.h>
#include <IOKit/system.h>
#include <IOKit/IOLib.h>
#include <IOKit/IOMapper.h>
#include <IOKit/IOBufferMemoryDescriptor.h>
+#include <libkern/OSDebug.h>
+#include <mach/mach_vm.h>
#include "IOKitKernelInternal.h"
-#include "IOCopyMapper.h"
+
+#ifdef IOALLOCDEBUG
+#include <libkern/c++/OSCPPDebug.h>
+#endif
+#include <IOKit/IOStatisticsPrivate.h>
+
+#if IOKITSTATS
+#define IOStatisticsAlloc(type, size) \
+do { \
+ IOStatistics::countAlloc(type, size); \
+} while (0)
+#else
+#define IOStatisticsAlloc(type, size)
+#endif /* IOKITSTATS */
+
__BEGIN_DECLS
void ipc_port_release_send(ipc_port_t port);
#include <vm/pmap.h>
-vm_map_t IOPageableMapForAddress( vm_address_t address );
__END_DECLS
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-volatile ppnum_t gIOHighestAllocatedPage;
+enum
+{
+ kInternalFlagPhysical = 0x00000001,
+ kInternalFlagPageSized = 0x00000002,
+ kInternalFlagPageAllocated = 0x00000004
+};
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
@@ -52,50 +75,26 @@
OSDefineMetaClassAndStructors(IOBufferMemoryDescriptor,
IOGeneralMemoryDescriptor);
-bool IOBufferMemoryDescriptor::initWithAddress(
- void * /* address */ ,
- IOByteCount /* withLength */ ,
- IODirection /* withDirection */ )
-{
- return false;
-}
-
-bool IOBufferMemoryDescriptor::initWithAddress(
- vm_address_t /* address */ ,
- IOByteCount /* withLength */ ,
- IODirection /* withDirection */ ,
- task_t /* withTask */ )
-{
- return false;
-}
-
-bool IOBufferMemoryDescriptor::initWithPhysicalAddress(
- IOPhysicalAddress /* address */ ,
- IOByteCount /* withLength */ ,
- IODirection /* withDirection */ )
-{
- return false;
-}
-
-bool IOBufferMemoryDescriptor::initWithPhysicalRanges(
- IOPhysicalRange * /* ranges */ ,
- UInt32 /* withCount */ ,
- IODirection /* withDirection */ ,
- bool /* asReference */ )
-{
- return false;
-}
-
-bool IOBufferMemoryDescriptor::initWithRanges(
- IOVirtualRange * /* ranges */ ,
- UInt32 /* withCount */ ,
- IODirection /* withDirection */ ,
- task_t /* withTask */ ,
- bool /* asReference */ )
-{
- return false;
-}
-
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+static uintptr_t IOBMDPageProc(iopa_t * a)
+{
+ kern_return_t kr;
+ vm_address_t vmaddr = 0;
+ int options = 0; // KMA_LOMEM;
+
+ kr = kernel_memory_allocate(kernel_map, &vmaddr,
+ page_size, 0, options, VM_KERN_MEMORY_IOKIT);
+
+ if (KERN_SUCCESS != kr) vmaddr = 0;
+ else bzero((void *) vmaddr, page_size);
+
+ return ((uintptr_t) vmaddr);
+}
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#ifndef __LP64__
bool IOBufferMemoryDescriptor::initWithOptions(
IOOptionBits options,
vm_size_t capacity,
@@ -105,6 +104,7 @@
mach_vm_address_t physicalMask = 0;
return (initWithPhysicalMask(inTask, options, capacity, alignment, physicalMask));
}
+#endif /* !__LP64__ */
bool IOBufferMemoryDescriptor::initWithPhysicalMask(
task_t inTask,
@@ -113,149 +113,155 @@
mach_vm_address_t alignment,
mach_vm_address_t physicalMask)
{
- kern_return_t kr;
- task_t mapTask = NULL;
- vm_map_t vmmap = NULL;
- addr64_t lastIOAddr;
- IOAddressRange range;
- IOOptionBits iomdOptions = kIOMemoryTypeVirtual64;
-
- if (!capacity)
- return false;
-
- _options = options;
- _capacity = capacity;
- _physAddrs = 0;
- _physSegCount = 0;
- _buffer = 0;
- range.address = 0;
- range.length = 0;
- _ranges.v64 = ⦥
-
- // Grab the direction and the Auto Prepare bits from the Buffer MD options
- iomdOptions |= options & (kIOMemoryDirectionMask | kIOMemoryAutoPrepare);
-
- if ((options & (kIOMemorySharingTypeMask | kIOMapCacheMask)) && (alignment < page_size))
+ task_t mapTask = NULL;
+ vm_map_t vmmap = NULL;
+ mach_vm_address_t highestMask = 0;
+ IOOptionBits iomdOptions = kIOMemoryTypeVirtual64 | kIOMemoryAsReference;
+ IODMAMapSpecification mapSpec;
+ bool mapped = false;
+ bool needZero;
+
+ if (!capacity) return false;
+
+ _options = options;
+ _capacity = capacity;
+ _internalFlags = 0;
+ _internalReserved = 0;
+ _buffer = 0;
+
+ _ranges.v64 = IONew(IOAddressRange, 1);
+ if (!_ranges.v64)
+ return (false);
+ _ranges.v64->address = 0;
+ _ranges.v64->length = 0;
+ // make sure super::free doesn't dealloc _ranges before super::init
+ _flags = kIOMemoryAsReference;
+
+ // Grab IOMD bits from the Buffer MD options
+ iomdOptions |= (options & kIOBufferDescriptorMemoryFlags);
+
+ if (!(kIOMemoryMapperNone & options))
+ {
+ IOMapper::checkForSystemMapper();
+ mapped = (0 != IOMapper::gSystem);
+ }
+ needZero = (mapped || (0 != (kIOMemorySharingTypeMask & options)));
+
+ if (physicalMask && (alignment <= 1))
+ {
+ alignment = ((physicalMask ^ (-1ULL)) & (physicalMask - 1));
+ highestMask = (physicalMask | alignment);
+ alignment++;
+ if (alignment < page_size)
+ alignment = page_size;
+ }
+
+ if ((options & (kIOMemorySharingTypeMask | kIOMapCacheMask | kIOMemoryClearEncrypt)) && (alignment < page_size))
alignment = page_size;
- if (physicalMask && (alignment <= 1))
- alignment = ((physicalMask ^ PAGE_MASK) & PAGE_MASK) + 1;
+ if (alignment >= page_size)
+ capacity = round_page(capacity);
+
+ if (alignment > page_size)
+ options |= kIOMemoryPhysicallyContiguous;
_alignment = alignment;
- if (((inTask != kernel_task) && !(options & kIOMemoryPageable)) ||
- (physicalMask && (options & kIOMapCacheMask)))
+ if ((capacity + alignment) < _capacity) return (false);
+
+ if ((inTask != kernel_task) && !(options & kIOMemoryPageable))
return false;
- if ((options & kIOMemoryPhysicallyContiguous) && !physicalMask)
- physicalMask = 0xFFFFFFFF;
-
- // set flags for entry + object create
- vm_prot_t memEntryCacheMode = VM_PROT_READ | VM_PROT_WRITE;
-
- // set memory entry cache mode
- switch (options & kIOMapCacheMask)
- {
- case kIOMapInhibitCache:
- SET_MAP_MEM(MAP_MEM_IO, memEntryCacheMode);
- break;
-
- case kIOMapWriteThruCache:
- SET_MAP_MEM(MAP_MEM_WTHRU, memEntryCacheMode);
- break;
-
- case kIOMapWriteCombineCache:
- SET_MAP_MEM(MAP_MEM_WCOMB, memEntryCacheMode);
- break;
-
- case kIOMapCopybackCache:
- SET_MAP_MEM(MAP_MEM_COPYBACK, memEntryCacheMode);
- break;
-
- case kIOMapDefaultCache:
- default:
- SET_MAP_MEM(MAP_MEM_NOOP, memEntryCacheMode);
- break;
- }
-
+ bzero(&mapSpec, sizeof(mapSpec));
+ mapSpec.alignment = _alignment;
+ mapSpec.numAddressBits = 64;
+ if (highestMask && mapped)
+ {
+ if (highestMask <= 0xFFFFFFFF)
+ mapSpec.numAddressBits = (32 - __builtin_clz((unsigned int) highestMask));
+ else
+ mapSpec.numAddressBits = (64 - __builtin_clz((unsigned int) (highestMask >> 32)));
+ highestMask = 0;
+ }
+
+ // set memory entry cache mode, pageable, purgeable
+ iomdOptions |= ((options & kIOMapCacheMask) >> kIOMapCacheShift) << kIOMemoryBufferCacheShift;
if (options & kIOMemoryPageable)
{
iomdOptions |= kIOMemoryBufferPageable;
-
- // must create the entry before any pages are allocated
-
- // set flags for entry + object create
- memEntryCacheMode |= MAP_MEM_NAMED_CREATE;
-
- if (options & kIOMemoryPurgeable)
- memEntryCacheMode |= MAP_MEM_PURGABLE;
+ if (options & kIOMemoryPurgeable) iomdOptions |= kIOMemoryBufferPurgeable;
}
else
{
- memEntryCacheMode |= MAP_MEM_NAMED_REUSE;
-
- if (IOMapper::gSystem)
- // assuming mapped space is 2G
- lastIOAddr = (1UL << 31) - PAGE_SIZE;
+ vmmap = kernel_map;
+
+ // Buffer shouldn't auto prepare they should be prepared explicitly
+ // But it never was enforced so what are you going to do?
+ iomdOptions |= kIOMemoryAutoPrepare;
+
+ /* Allocate a wired-down buffer inside kernel space. */
+
+ bool contig = (0 != (options & kIOMemoryHostPhysicallyContiguous));
+
+ if (!contig && (0 != (options & kIOMemoryPhysicallyContiguous)))
+ {
+ contig |= (!mapped);
+ contig |= (0 != (kIOMemoryMapperNone & options));
+#if 0
+ // treat kIOMemoryPhysicallyContiguous as kIOMemoryHostPhysicallyContiguous for now
+ contig |= true;
+#endif
+ }
+
+ if (contig || highestMask || (alignment > page_size))
+ {
+ _internalFlags |= kInternalFlagPhysical;
+ if (highestMask)
+ {
+ _internalFlags |= kInternalFlagPageSized;
+ capacity = round_page(capacity);
+ }
+ _buffer = (void *) IOKernelAllocateWithPhysicalRestrict(
+ capacity, highestMask, alignment, contig);
+ }
+ else if (needZero
+ && ((capacity + alignment) <= (page_size - gIOPageAllocChunkBytes)))
+ {
+ _internalFlags |= kInternalFlagPageAllocated;
+ needZero = false;
+ _buffer = (void *) iopa_alloc(&gIOBMDPageAllocator, &IOBMDPageProc, capacity, alignment);
+ if (_buffer)
+ {
+ IOStatisticsAlloc(kIOStatisticsMallocAligned, capacity);
+#if IOALLOCDEBUG
+ OSAddAtomic(capacity, &debug_iomalloc_size);
+#endif
+ }
+ }
+ else if (alignment > 1)
+ {
+ _buffer = IOMallocAligned(capacity, alignment);
+ }
else
- lastIOAddr = ptoa_64(gIOHighestAllocatedPage);
-
- if (physicalMask && (lastIOAddr != (lastIOAddr & physicalMask)))
- {
- mach_vm_address_t address;
- iomdOptions &= ~kIOMemoryTypeVirtual64;
- iomdOptions |= kIOMemoryTypePhysical64;
-
- address = IOMallocPhysical(capacity, physicalMask);
- _buffer = (void *) address;
- if (!_buffer)
- return false;
-
- mapTask = inTask;
- inTask = 0;
- }
- else
- {
- vmmap = kernel_map;
-
- // Buffer shouldn't auto prepare they should be prepared explicitly
- // But it never was enforced so what are you going to do?
- iomdOptions |= kIOMemoryAutoPrepare;
-
- /* Allocate a wired-down buffer inside kernel space. */
- if (options & kIOMemoryPhysicallyContiguous)
- _buffer = (void *) IOKernelAllocateContiguous(capacity, alignment);
- else if (alignment > 1)
- _buffer = IOMallocAligned(capacity, alignment);
- else
- _buffer = IOMalloc(capacity);
- if (!_buffer)
- return false;
- }
- }
-
- if( (kIOMemoryTypePhysical64 != (kIOMemoryTypeMask & iomdOptions))
- && (options & (kIOMemoryPageable | kIOMapCacheMask))) {
- ipc_port_t sharedMem;
- vm_size_t size = round_page_32(capacity);
-
- kr = mach_make_memory_entry(vmmap,
- &size, (vm_offset_t)_buffer,
- memEntryCacheMode, &sharedMem,
- NULL );
-
- if( (KERN_SUCCESS == kr) && (size != round_page_32(capacity))) {
- ipc_port_release_send( sharedMem );
- kr = kIOReturnVMError;
- }
- if( KERN_SUCCESS != kr)
- return( false );
-
- _memEntry = (void *) sharedMem;
+ {
+ _buffer = IOMalloc(capacity);
+ }
+ if (!_buffer)
+ {
+ return false;
+ }
+ if (needZero) bzero(_buffer, capacity);
+ }
+
+ if( (options & (kIOMemoryPageable | kIOMapCacheMask))) {
+ vm_size_t size = round_page(capacity);
+
+ // initWithOptions will create memory entry
+ iomdOptions |= kIOMemoryPersistent;
if( options & kIOMemoryPageable) {
#if IOALLOCDEBUG
- debug_iomallocpageable_size += size;
+ OSAddAtomicLong(size, &debug_iomallocpageable_size);
#endif
mapTask = inTask;
if (NULL == inTask)
@@ -269,54 +275,24 @@
while (startAddr < endAddr)
{
- *startAddr;
+ UInt8 dummyVar = *startAddr;
+ (void) dummyVar;
startAddr += page_size;
- }
- }
- }
-
- range.address = (mach_vm_address_t) _buffer;
- range.length = capacity;
-
- if (!super::initWithOptions(&range, 1, 0,
+ }
+ }
+ }
+
+ _ranges.v64->address = (mach_vm_address_t) _buffer;;
+ _ranges.v64->length = _capacity;
+
+ if (!super::initWithOptions(_ranges.v64, 1, 0,
inTask, iomdOptions, /* System mapper */ 0))
return false;
- if (physicalMask && !IOMapper::gSystem)
- {
- IOMDDMACharacteristics mdSummary;
-
- bzero(&mdSummary, sizeof(mdSummary));
- IOReturn rtn = dmaCommandOperation(
- kIOMDGetCharacteristics,
- &mdSummary, sizeof(mdSummary));
- if (rtn)
- return false;
-
- if (mdSummary.fHighestPage)
- {
- ppnum_t highest;
- while (mdSummary.fHighestPage > (highest = gIOHighestAllocatedPage))
- {
- if (OSCompareAndSwap(highest, mdSummary.fHighestPage,
- (UInt32 *) &gIOHighestAllocatedPage))
- break;
- }
- lastIOAddr = ptoa_64(mdSummary.fHighestPage);
- }
- else
- lastIOAddr = ptoa_64(gIOLastPage);
-
- if (lastIOAddr != (lastIOAddr & physicalMask))
- {
- if (kIOMemoryTypePhysical64 != (_flags & kIOMemoryTypeMask))
- {
- // flag a retry
- _physSegCount = 1;
- }
- return false;
- }
- }
+ // give any system mapper the allocation params
+ if (kIOReturnSuccess != dmaCommandOperation(kIOMDAddDMAMapSpec,
+ &mapSpec, sizeof(mapSpec)))
+ return false;
if (mapTask)
{
@@ -325,20 +301,23 @@
if( !reserved)
return( false );
}
- reserved->map = map(mapTask, 0, kIOMapAnywhere, 0, 0);
+ reserved->map = createMappingInTask(mapTask, 0,
+ kIOMapAnywhere | (options & kIOMapPrefault) | (options & kIOMapCacheMask), 0, 0);
if (!reserved->map)
{
_buffer = 0;
return( false );
}
release(); // map took a retain on this
+ reserved->map->retain();
+ removeMapping(reserved->map);
mach_vm_address_t buffer = reserved->map->getAddress();
_buffer = (void *) buffer;
if (kIOMemoryTypeVirtual64 == (kIOMemoryTypeMask & iomdOptions))
_ranges.v64->address = buffer;
}
- setLength(capacity);
+ setLength(_capacity);
return true;
}
@@ -351,19 +330,9 @@
{
IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor;
- if (me && !me->initWithOptions(options, capacity, alignment, inTask)) {
- bool retry = me->_physSegCount;
+ if (me && !me->initWithPhysicalMask(inTask, options, capacity, alignment, 0)) {
me->release();
me = 0;
- if (retry)
- {
- me = new IOBufferMemoryDescriptor;
- if (me && !me->initWithOptions(options, capacity, alignment, inTask))
- {
- me->release();
- me = 0;
- }
- }
}
return me;
}
@@ -378,36 +347,34 @@
if (me && !me->initWithPhysicalMask(inTask, options, capacity, 1, physicalMask))
{
- bool retry = me->_physSegCount;
me->release();
me = 0;
- if (retry)
- {
- me = new IOBufferMemoryDescriptor;
- if (me && !me->initWithPhysicalMask(inTask, options, capacity, 1, physicalMask))
- {
- me->release();
- me = 0;
- }
- }
}
return me;
}
+#ifndef __LP64__
bool IOBufferMemoryDescriptor::initWithOptions(
IOOptionBits options,
vm_size_t capacity,
vm_offset_t alignment)
{
- return( initWithOptions(options, capacity, alignment, kernel_task) );
-}
+ return (initWithPhysicalMask(kernel_task, options, capacity, alignment, (mach_vm_address_t)0));
+}
+#endif /* !__LP64__ */
IOBufferMemoryDescriptor * IOBufferMemoryDescriptor::withOptions(
IOOptionBits options,
vm_size_t capacity,
vm_offset_t alignment)
{
- return(IOBufferMemoryDescriptor::inTaskWithOptions(kernel_task, options, capacity, alignment));
+ IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor;
+
+ if (me && !me->initWithPhysicalMask(kernel_task, options, capacity, alignment, 0)) {
+ me->release();
+ me = 0;
+ }
+ return me;
}
@@ -428,6 +395,7 @@
inCapacity, inContiguous ? inCapacity : 1 ));
}
+#ifndef __LP64__
/*
* initWithBytes:
*
@@ -439,10 +407,9 @@
IODirection inDirection,
bool inContiguous)
{
- if (!initWithOptions(
- inDirection | kIOMemoryUnshared
- | (inContiguous ? kIOMemoryPhysicallyContiguous : 0),
- inLength, inLength ))
+ if (!initWithPhysicalMask(kernel_task, inDirection | kIOMemoryUnshared
+ | (inContiguous ? kIOMemoryPhysicallyContiguous : 0),
+ inLength, inLength, (mach_vm_address_t)0))
return false;
// start out with no data
@@ -453,6 +420,7 @@
return true;
}
+#endif /* !__LP64__ */
/*
* withBytes:
@@ -468,21 +436,25 @@
{
IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor;
- if (me && !me->initWithBytes(inBytes, inLength, inDirection, inContiguous))
- {
- bool retry = me->_physSegCount;
+ if (me && !me->initWithPhysicalMask(
+ kernel_task, inDirection | kIOMemoryUnshared
+ | (inContiguous ? kIOMemoryPhysicallyContiguous : 0),
+ inLength, inLength, 0 ))
+ {
me->release();
me = 0;
- if (retry)
- {
- me = new IOBufferMemoryDescriptor;
- if (me && !me->initWithBytes(inBytes, inLength, inDirection, inContiguous))
- {
- me->release();
- me = 0;
- }
- }
-
+ }
+
+ if (me)
+ {
+ // start out with no data
+ me->setLength(0);
+
+ if (!me->appendBytes(inBytes, inLength))
+ {
+ me->release();
+ me = 0;
+ }
}
return me;
}
@@ -496,13 +468,17 @@
{
// Cache all of the relevant information on the stack for use
// after we call super::free()!
- IOOptionBits flags = _flags;
+ IOOptionBits flags = _flags;
+ IOOptionBits internalFlags = _internalFlags;
IOOptionBits options = _options;
vm_size_t size = _capacity;
void * buffer = _buffer;
- IOVirtualAddress source = _ranges.v64->address;
IOMemoryMap * map = 0;
+ IOAddressRange * range = _ranges.v64;
vm_offset_t alignment = _alignment;
+
+ if (alignment >= page_size)
+ size = round_page(size);
if (reserved)
{
@@ -518,20 +494,41 @@
if (options & kIOMemoryPageable)
{
#if IOALLOCDEBUG
- debug_iomallocpageable_size -= round_page_32(size);
+ OSAddAtomicLong(-(round_page(size)), &debug_iomallocpageable_size);
#endif
}
else if (buffer)
{
- if (kIOMemoryTypePhysical64 == (flags & kIOMemoryTypeMask))
- IOFreePhysical((mach_vm_address_t) source, size);
- else if (options & kIOMemoryPhysicallyContiguous)
- IOKernelFreeContiguous((mach_vm_address_t) buffer, size);
+ if (kInternalFlagPageSized & internalFlags) size = round_page(size);
+
+ if (kInternalFlagPhysical & internalFlags)
+ {
+ IOKernelFreePhysical((mach_vm_address_t) buffer, size);
+ }
+ else if (kInternalFlagPageAllocated & internalFlags)
+ {
+ uintptr_t page;
+ page = iopa_free(&gIOBMDPageAllocator, (uintptr_t) buffer, size);
+ if (page)
+ {
+ kmem_free(kernel_map, page, page_size);
+ }
+#if IOALLOCDEBUG
+ OSAddAtomic(-size, &debug_iomalloc_size);
+#endif
+ IOStatisticsAlloc(kIOStatisticsFreeAligned, size);
+ }
else if (alignment > 1)
+ {
IOFreeAligned(buffer, size);
+ }
else
+ {
IOFree(buffer, size);
- }
+ }
+ }
+ if (range && (kIOMemoryAsReference & flags))
+ IODelete(range, IOAddressRange, 1);
}
/*
@@ -557,6 +554,7 @@
void IOBufferMemoryDescriptor::setLength(vm_size_t length)
{
assert(length <= _capacity);
+ if (length > _capacity) return;
_length = length;
_ranges.v64->length = length;
@@ -571,7 +569,10 @@
*/
void IOBufferMemoryDescriptor::setDirection(IODirection direction)
{
- _direction = direction;
+ _flags = (_flags & ~kIOMemoryDirectionMask) | direction;
+#ifndef __LP64__
+ _direction = (IODirection) (_flags & kIOMemoryDirectionMask);
+#endif /* !__LP64__ */
}
/*
@@ -625,6 +626,9 @@
IOBufferMemoryDescriptor::getBytesNoCopy(vm_size_t start, vm_size_t withLength)
{
IOVirtualAddress address;
+
+ if ((start + withLength) < start) return 0;
+
if (kIOMemoryTypePhysical64 == (_flags & kIOMemoryTypeMask))
address = (IOVirtualAddress) _buffer;
else
@@ -635,8 +639,9 @@
return 0;
}
-/* DEPRECATED */ void * IOBufferMemoryDescriptor::getVirtualSegment(IOByteCount offset,
-/* DEPRECATED */ IOByteCount * lengthOfSegment)
+#ifndef __LP64__
+void * IOBufferMemoryDescriptor::getVirtualSegment(IOByteCount offset,
+ IOByteCount * lengthOfSegment)
{
void * bytes = getBytesNoCopy(offset, 0);
@@ -645,9 +650,15 @@
return bytes;
}
-
+#endif /* !__LP64__ */
+
+#ifdef __LP64__
+OSMetaClassDefineReservedUnused(IOBufferMemoryDescriptor, 0);
+OSMetaClassDefineReservedUnused(IOBufferMemoryDescriptor, 1);
+#else /* !__LP64__ */
OSMetaClassDefineReservedUsed(IOBufferMemoryDescriptor, 0);
OSMetaClassDefineReservedUsed(IOBufferMemoryDescriptor, 1);
+#endif /* !__LP64__ */
OSMetaClassDefineReservedUnused(IOBufferMemoryDescriptor, 2);
OSMetaClassDefineReservedUnused(IOBufferMemoryDescriptor, 3);
OSMetaClassDefineReservedUnused(IOBufferMemoryDescriptor, 4);