Loading...
--- xnu/xnu-201/iokit/Kernel/IOMemoryDescriptor.cpp
+++ xnu/xnu-344/iokit/Kernel/IOMemoryDescriptor.cpp
@@ -34,6 +34,10 @@
#include <IOKit/IOKitDebug.h>
#include <libkern/c++/OSContainers.h>
+#include <libkern/c++/OSDictionary.h>
+#include <libkern/c++/OSArray.h>
+#include <libkern/c++/OSSymbol.h>
+#include <libkern/c++/OSNumber.h>
#include <sys/cdefs.h>
__BEGIN_DECLS
@@ -41,7 +45,10 @@
#include <device/device_port.h>
void bcopy_phys(char *from, char *to, int size);
void pmap_enter(pmap_t pmap, vm_offset_t va, vm_offset_t pa,
- vm_prot_t prot, boolean_t wired);
+ vm_prot_t prot, unsigned int flags, boolean_t wired);
+#ifndef i386
+struct phys_entry *pmap_find_physentry(vm_offset_t pa);
+#endif
void ipc_port_release_send(ipc_port_t port);
vm_offset_t vm_map_get_phys_page(vm_map_t map, vm_offset_t offset);
@@ -51,6 +58,9 @@
int device_handle,
vm_size_t size,
int flags);
+void
+device_pager_deallocate(
+ memory_object_t);
kern_return_t
device_pager_populate_object(
memory_object_t pager,
@@ -58,12 +68,23 @@
vm_offset_t phys_addr,
vm_size_t size);
+/*
+ * Page fault handling based on vm_map (or entries therein)
+ */
+extern kern_return_t vm_fault(
+ vm_map_t map,
+ vm_offset_t vaddr,
+ vm_prot_t fault_type,
+ boolean_t change_wiring,
+ int interruptible,
+ pmap_t caller_pmap,
+ vm_offset_t caller_pmap_addr);
+
__END_DECLS
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-OSDefineMetaClass( IOMemoryDescriptor, OSObject )
-OSDefineAbstractStructors( IOMemoryDescriptor, OSObject )
+OSDefineMetaClassAndAbstractStructors( IOMemoryDescriptor, OSObject )
#define super IOMemoryDescriptor
@@ -79,6 +100,16 @@
IOIteratePageableMapsCallback callback, void * ref);
}
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+static IORecursiveLock * gIOMemoryLock;
+
+#define LOCK IORecursiveLockLock( gIOMemoryLock)
+#define UNLOCK IORecursiveLockUnlock( gIOMemoryLock)
+#define SLEEP IORecursiveLockSleep( gIOMemoryLock, (void *)this, THREAD_UNINT)
+#define WAKEUP \
+ IORecursiveLockWakeup( gIOMemoryLock, (void *)this, /* one-thread */ false)
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
@@ -124,22 +155,40 @@
vm_object_offset_t offset,
vm_size_t size)
{
- IOMemoryDescriptor * memDesc = (IOMemoryDescriptor *) device_handle;
-
- assert( OSDynamicCast( IOMemoryDescriptor, memDesc ));
-
- return( memDesc->handleFault( device_pager, 0, 0,
- offset, size, kIOMapDefaultCache /*?*/));
+ struct ExpansionData {
+ void * devicePager;
+ unsigned int pagerContig:1;
+ unsigned int unused:31;
+ IOMemoryDescriptor * memory;
+ };
+ kern_return_t kr;
+ ExpansionData * ref = (ExpansionData *) device_handle;
+ IOMemoryDescriptor * memDesc;
+
+ LOCK;
+ memDesc = ref->memory;
+ if( memDesc)
+ kr = memDesc->handleFault( device_pager, 0, 0,
+ offset, size, kIOMapDefaultCache /*?*/);
+ else
+ kr = KERN_ABORTED;
+ UNLOCK;
+
+ return( kr );
}
kern_return_t device_close(
int device_handle)
{
- IOMemoryDescriptor * memDesc = (IOMemoryDescriptor *) device_handle;
-
- assert( OSDynamicCast( IOMemoryDescriptor, memDesc ));
-
- memDesc->release();
+ struct ExpansionData {
+ void * devicePager;
+ unsigned int pagerContig:1;
+ unsigned int unused:31;
+ IOMemoryDescriptor * memory;
+ };
+ ExpansionData * ref = (ExpansionData *) device_handle;
+
+ IODelete( ref, ExpansionData, 1 );
return( kIOReturnSuccess );
}
@@ -412,12 +461,23 @@
*/
void IOGeneralMemoryDescriptor::free()
{
+ LOCK;
+ if( reserved)
+ reserved->memory = 0;
+ UNLOCK;
+
while (_wireCount)
complete();
if (_kernPtrAligned)
unmapFromKernel();
if (_ranges.v && _rangesIsAllocated)
IODelete(_ranges.v, IOVirtualRange, _rangesCount);
+
+ if( reserved && reserved->devicePager)
+ device_pager_deallocate( reserved->devicePager );
+
+ // memEntry holds a ref on the device pager which owns reserved (ExpansionData)
+ // so no reserved access after this point
if( _memEntry)
ipc_port_release_send( (ipc_port_t) _memEntry );
super::free();
@@ -499,6 +559,7 @@
/* DEPRECATED */ _kernPtrAligned + off,
/* DEPRECATED */ phys_addr,
/* DEPRECATED */ VM_PROT_READ|VM_PROT_WRITE,
+/* DEPRECATED */ VM_WIMG_USE_DEFAULT,
/* DEPRECATED */ TRUE);
/* DEPRECATED */ }
/* DEPRECATED */ _kernPtrAtIndex = rangeIndex;
@@ -538,11 +599,12 @@
IOPhysicalAddress IOMemoryDescriptor::getSourceSegment( IOByteCount offset,
IOByteCount * length )
{
- IOPhysicalAddress physAddr;
-
- prepare();
- physAddr = getPhysicalSegment( offset, length );
- complete();
+ IOPhysicalAddress physAddr = 0;
+
+ if( prepare() == kIOReturnSuccess) {
+ physAddr = getPhysicalSegment( offset, length );
+ complete();
+ }
return( physAddr );
}
@@ -710,6 +772,11 @@
return bytesCopied;
}
+
+extern "C" {
+// osfmk/device/iokit_rpc.c
+extern unsigned int IOTranslateCacheBits(struct phys_entry *pp);
+};
/* DEPRECATED */ void IOGeneralMemoryDescriptor::setPosition(IOByteCount position)
/* DEPRECATED */ {
@@ -1104,14 +1171,14 @@
- trunc_page(_ranges.v[index].address);
if( _task) {
-#if NOTYET
- vm_object_offset_t actualSize = size;
- kr = mach_make_memory_entry_64( get_task_map(_task),
+#ifndef i386
+ vm_size_t actualSize = size;
+ kr = mach_make_memory_entry( get_task_map(_task),
&actualSize, _ranges.v[0].address,
VM_PROT_READ | VM_PROT_WRITE, &sharedMem,
NULL );
- if( (KERN_SUCCESS == kr) && (actualSize != size)) {
+ if( (KERN_SUCCESS == kr) && (actualSize != round_page(size))) {
#if IOASSERT
IOLog("mach_make_memory_entry_64 (%08lx) size (%08lx:%08lx)\n",
_ranges.v[0].address, (UInt32)actualSize, size);
@@ -1121,12 +1188,18 @@
}
if( KERN_SUCCESS != kr)
-#endif /* NOTYET */
+#endif /* i386 */
sharedMem = MACH_PORT_NULL;
} else do {
memory_object_t pager;
+ unsigned int flags=0;
+ struct phys_entry *pp;
+ IOPhysicalAddress pa;
+ IOPhysicalLength segLen;
+
+ pa = getPhysicalSegment( sourceOffset, &segLen );
if( !reserved) {
reserved = IONew( ExpansionData, 1 );
@@ -1134,32 +1207,77 @@
continue;
}
reserved->pagerContig = (1 == _rangesCount);
-
- pager = device_pager_setup( (memory_object_t) 0, (int) this, size,
- reserved->pagerContig ? DEVICE_PAGER_CONTIGUOUS : 0 );
+ reserved->memory = this;
+
+#ifndef i386
+ switch(options & kIOMapCacheMask ) { /*What cache mode do we need*/
+
+ case kIOMapDefaultCache:
+ default:
+ if((pp = pmap_find_physentry(pa))) {/* Find physical address */
+ /* Use physical attributes as default */
+ flags = IOTranslateCacheBits(pp);
+
+ }
+ else { /* If no physical, just hard code attributes */
+ flags = DEVICE_PAGER_CACHE_INHIB |
+ DEVICE_PAGER_COHERENT | DEVICE_PAGER_GUARDED;
+ }
+ break;
+
+ case kIOMapInhibitCache:
+ flags = DEVICE_PAGER_CACHE_INHIB |
+ DEVICE_PAGER_COHERENT | DEVICE_PAGER_GUARDED;
+ break;
+
+ case kIOMapWriteThruCache:
+ flags = DEVICE_PAGER_WRITE_THROUGH |
+ DEVICE_PAGER_COHERENT | DEVICE_PAGER_GUARDED;
+ break;
+
+ case kIOMapCopybackCache:
+ flags = DEVICE_PAGER_COHERENT;
+ break;
+ }
+
+ flags |= reserved->pagerContig ? DEVICE_PAGER_CONTIGUOUS : 0;
+#else
+ flags = reserved->pagerContig ? DEVICE_PAGER_CONTIGUOUS : 0;
+#endif
+
+ pager = device_pager_setup( (memory_object_t) 0, (int) reserved,
+ size, flags);
assert( pager );
if( pager) {
- retain(); // pager has a ref
kr = mach_memory_object_memory_entry_64( (host_t) 1, false /*internal*/,
size, VM_PROT_READ | VM_PROT_WRITE, pager, &sharedMem );
assert( KERN_SUCCESS == kr );
if( KERN_SUCCESS != kr) {
-// chris?
-// ipc_port_release_send( (ipc_port_t) pager );
+ device_pager_deallocate( pager );
pager = MACH_PORT_NULL;
sharedMem = MACH_PORT_NULL;
}
}
- reserved->devicePager = pager;
+ if( pager && sharedMem)
+ reserved->devicePager = pager;
+ else {
+ IODelete( reserved, ExpansionData, 1 );
+ reserved = 0;
+ }
} while( false );
_memEntry = (void *) sharedMem;
}
- kr = super::doMap( addressMap, atAddress,
+#ifndef i386
+ if( 0 == sharedMem)
+ kr = kIOReturnVMError;
+ else
+#endif
+ kr = super::doMap( addressMap, atAddress,
options, sourceOffset, length );
return( kr );
@@ -1190,15 +1308,11 @@
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-static IORecursiveLock * gIOMemoryLock;
-
-#define LOCK IORecursiveLockLock( gIOMemoryLock)
-#define UNLOCK IORecursiveLockUnlock( gIOMemoryLock)
-
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-
-OSDefineMetaClass( IOMemoryMap, OSObject )
-OSDefineAbstractStructors( IOMemoryMap, OSObject )
+OSDefineMetaClassAndAbstractStructors( IOMemoryMap, OSObject )
+
+/* inline function implementation */
+IOPhysicalAddress IOMemoryMap::getPhysicalAddress()
+ { return( getPhysicalSegment( 0, 0 )); }
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
@@ -1215,8 +1329,11 @@
vm_map_t addressMap;
IOOptionBits options;
+protected:
+ virtual void taggedRelease(const void *tag = 0) const;
+ virtual void free();
+
public:
- virtual void free();
// IOMemoryMap methods
virtual IOVirtualAddress getVirtualAddress();
@@ -1232,7 +1349,7 @@
IOByteCount * length);
// for IOMemoryDescriptor use
- _IOMemoryMap * isCompatible(
+ _IOMemoryMap * copyCompatible(
IOMemoryDescriptor * owner,
task_t intoTask,
IOVirtualAddress toAddress,
@@ -1240,13 +1357,13 @@
IOByteCount offset,
IOByteCount length );
- bool init(
+ bool initCompatible(
IOMemoryDescriptor * memory,
IOMemoryMap * superMap,
IOByteCount offset,
IOByteCount length );
- bool init(
+ bool initWithDescriptor(
IOMemoryDescriptor * memory,
task_t intoTask,
IOVirtualAddress toAddress,
@@ -1267,7 +1384,7 @@
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-bool _IOMemoryMap::init(
+bool _IOMemoryMap::initCompatible(
IOMemoryDescriptor * _memory,
IOMemoryMap * _superMap,
IOByteCount _offset,
@@ -1297,7 +1414,7 @@
return( true );
}
-bool _IOMemoryMap::init(
+bool _IOMemoryMap::initWithDescriptor(
IOMemoryDescriptor * _memory,
task_t intoTask,
IOVirtualAddress toAddress,
@@ -1316,7 +1433,7 @@
addressMap = get_task_map(intoTask);
if( !addressMap)
return( false);
- kernel_vm_map_reference(addressMap);
+ vm_map_reference(addressMap);
_memory->retain();
memory = _memory;
@@ -1402,6 +1519,7 @@
return( err );
}
+
IOReturn IOMemoryDescriptor::doMap(
vm_map_t addressMap,
IOVirtualAddress * atAddress,
@@ -1494,21 +1612,15 @@
if( !addressMap) {
- LOCK;
-
if( kIOMemoryRedirected & _flags) {
#ifdef DEBUG
- IOLog("sleep mem redirect %x, %lx\n", address, sourceOffset);
+ IOLog("sleep mem redirect %p, %lx\n", this, sourceOffset);
#endif
do {
- assert_wait( (event_t) this, THREAD_UNINT );
- UNLOCK;
- thread_block((void (*)(void)) 0);
- LOCK;
+ SLEEP;
} while( kIOMemoryRedirected & _flags );
}
- UNLOCK;
return( kIOReturnSuccess );
}
@@ -1537,11 +1649,18 @@
segLen - pageOffset);
#endif
+
+
+
+
+#ifdef i386
+ /* i386 doesn't support faulting on device memory yet */
if( addressMap && (kIOReturnSuccess == err))
err = IOMapPages( addressMap, address, physAddr, segLen, options );
assert( KERN_SUCCESS == err );
if( err)
break;
+#endif
if( pager) {
if( reserved && reserved->pagerContig) {
@@ -1550,7 +1669,7 @@
allPhys = getPhysicalSegment( 0, &allLen );
assert( allPhys );
- err = device_pager_populate_object( pager, 0, trunc_page(allPhys), round_page(allPhys + allLen) );
+ err = device_pager_populate_object( pager, 0, trunc_page(allPhys), round_page(allLen) );
} else {
@@ -1565,6 +1684,31 @@
if( err)
break;
}
+#ifndef i386
+ /* *** ALERT *** */
+ /* *** Temporary Workaround *** */
+
+ /* This call to vm_fault causes an early pmap level resolution */
+ /* of the mappings created above. Need for this is in absolute */
+ /* violation of the basic tenet that the pmap layer is a cache. */
+ /* Further, it implies a serious I/O architectural violation on */
+ /* the part of some user of the mapping. As of this writing, */
+ /* the call to vm_fault is needed because the NVIDIA driver */
+ /* makes a call to pmap_extract. The NVIDIA driver needs to be */
+ /* fixed as soon as possible. The NVIDIA driver should not */
+ /* need to query for this info as it should know from the doMap */
+ /* call where the physical memory is mapped. When a query is */
+ /* necessary to find a physical mapping, it should be done */
+ /* through an iokit call which includes the mapped memory */
+ /* handle. This is required for machine architecture independence.*/
+
+ if(!(kIOMemoryRedirected & _flags)) {
+ vm_fault(addressMap, address, 3, FALSE, FALSE, NULL, 0);
+ }
+
+ /* *** Temporary Workaround *** */
+ /* *** ALERT *** */
+#endif
sourceOffset += segLen - pageOffset;
address += segLen;
bytes -= segLen;
@@ -1626,7 +1770,7 @@
_flags |= kIOMemoryRedirected;
else {
_flags &= ~kIOMemoryRedirected;
- thread_wakeup( (event_t) this);
+ WAKEUP;
}
UNLOCK;
@@ -1658,7 +1802,7 @@
if( logical && addressMap
&& (get_task_map( safeTask) != addressMap)
&& (0 == (options & kIOMapStatic))) {
-
+
IOUnmapPages( addressMap, logical, length );
if( !redirect) {
err = vm_deallocate( addressMap, logical, length );
@@ -1668,7 +1812,7 @@
} else
err = kIOReturnSuccess;
#ifdef DEBUG
- IOLog("IOMemoryMap::redirect(%d, %x) %x from %p\n", redirect, err, logical, addressMap);
+ IOLog("IOMemoryMap::redirect(%d, %p) %x:%lx from %p\n", redirect, this, logical, length, addressMap);
#endif
}
UNLOCK;
@@ -1710,6 +1854,15 @@
addressTask = 0;
logical = 0;
UNLOCK;
+}
+
+// Overload the release mechanism. All mappings must be a member
+// of a memory descriptors _mappings set. This means that we
+// always have 2 references on a mapping. When either of these mappings
+// are released we need to free ourselves.
+void _IOMemoryMap::taggedRelease(const void *tag = 0) const
+{
+ super::taggedRelease(tag, 2);
}
void _IOMemoryMap::free()
@@ -1757,7 +1910,7 @@
return( memory );
}
-_IOMemoryMap * _IOMemoryMap::isCompatible(
+_IOMemoryMap * _IOMemoryMap::copyCompatible(
IOMemoryDescriptor * owner,
task_t task,
IOVirtualAddress toAddress,
@@ -1769,7 +1922,10 @@
if( (!task) || (task != getAddressTask()))
return( 0 );
- if( (options ^ _options) & (kIOMapCacheMask | kIOMapReadOnly))
+ if( (options ^ _options) & kIOMapReadOnly)
+ return( 0 );
+ if( (kIOMapDefaultCache != (_options & kIOMapCacheMask))
+ && ((options ^ _options) & kIOMapCacheMask))
return( 0 );
if( (0 == (_options & kIOMapAnywhere)) && (logical != toAddress))
@@ -1790,7 +1946,7 @@
} else {
mapping = new _IOMemoryMap;
if( mapping
- && !mapping->init( owner, this, _offset, _length )) {
+ && !mapping->initCompatible( owner, this, _offset, _length )) {
mapping->release();
mapping = 0;
}
@@ -1828,9 +1984,6 @@
{
if( _mappings)
_mappings->release();
-
- if( reserved)
- IODelete( reserved, ExpansionData, 1 );
super::free();
}
@@ -1847,7 +2000,7 @@
LOCK;
if( map
- && !map->init( this, intoTask, mapAddress,
+ && !map->initWithDescriptor( this, intoTask, mapAddress,
options | kIOMapStatic, 0, getLength() )) {
map->release();
map = 0;
@@ -1901,7 +2054,7 @@
while( (mapping = (_IOMemoryMap *) iter->getNextObject())) {
- if( (mapping = mapping->isCompatible(
+ if( (mapping = mapping->copyCompatible(
owner, intoTask, toAddress,
options | kIOMapReference,
offset, length )))
@@ -1920,10 +2073,11 @@
mapping = new _IOMemoryMap;
if( mapping
- && !mapping->init( owner, intoTask, toAddress, options,
+ && !mapping->initWithDescriptor( owner, intoTask, toAddress, options,
offset, length )) {
-
+#ifdef DEBUG
IOLog("Didn't make map %08lx : %08lx\n", offset, length );
+#endif
mapping->release();
mapping = 0;
}
@@ -1943,19 +2097,16 @@
if( mapping) {
if( 0 == _mappings)
_mappings = OSSet::withCapacity(1);
- if( _mappings && _mappings->setObject( mapping ))
- mapping->release(); /* really */
+ if( _mappings )
+ _mappings->setObject( mapping );
}
}
void IOMemoryDescriptor::removeMapping(
IOMemoryMap * mapping )
{
- if( _mappings) {
- mapping->retain();
- mapping->retain();
+ if( _mappings)
_mappings->removeObject( mapping);
- }
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
@@ -2184,6 +2335,140 @@
bool asReference = false)
{
return( false );
+}
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+bool IOGeneralMemoryDescriptor::serialize(OSSerialize * s) const
+{
+ OSSymbol const *keys[2];
+ OSObject *values[2];
+ OSDictionary *dict;
+ IOVirtualRange *vcopy;
+ unsigned int index, nRanges;
+ bool result;
+
+ if (s == NULL) return false;
+ if (s->previouslySerialized(this)) return true;
+
+ // Pretend we are an array.
+ if (!s->addXMLStartTag(this, "array")) return false;
+
+ nRanges = _rangesCount;
+ vcopy = (IOVirtualRange *) IOMalloc(sizeof(IOVirtualRange) * nRanges);
+ if (vcopy == 0) return false;
+
+ keys[0] = OSSymbol::withCString("address");
+ keys[1] = OSSymbol::withCString("length");
+
+ result = false;
+ values[0] = values[1] = 0;
+
+ // From this point on we can go to bail.
+
+ // Copy the volatile data so we don't have to allocate memory
+ // while the lock is held.
+ LOCK;
+ if (nRanges == _rangesCount) {
+ for (index = 0; index < nRanges; index++) {
+ vcopy[index] = _ranges.v[index];
+ }
+ } else {
+ // The descriptor changed out from under us. Give up.
+ UNLOCK;
+ result = false;
+ goto bail;
+ }
+ UNLOCK;
+
+ for (index = 0; index < nRanges; index++)
+ {
+ values[0] = OSNumber::withNumber(_ranges.v[index].address, sizeof(_ranges.v[index].address) * 8);
+ if (values[0] == 0) {
+ result = false;
+ goto bail;
+ }
+ values[1] = OSNumber::withNumber(_ranges.v[index].length, sizeof(_ranges.v[index].length) * 8);
+ if (values[1] == 0) {
+ result = false;
+ goto bail;
+ }
+ OSDictionary *dict = OSDictionary::withObjects((const OSObject **)values, (const OSSymbol **)keys, 2);
+ if (dict == 0) {
+ result = false;
+ goto bail;
+ }
+ values[0]->release();
+ values[1]->release();
+ values[0] = values[1] = 0;
+
+ result = dict->serialize(s);
+ dict->release();
+ if (!result) {
+ goto bail;
+ }
+ }
+ result = s->addXMLEndTag("array");
+
+ bail:
+ if (values[0])
+ values[0]->release();
+ if (values[1])
+ values[1]->release();
+ if (keys[0])
+ keys[0]->release();
+ if (keys[1])
+ keys[1]->release();
+ if (vcopy)
+ IOFree(vcopy, sizeof(IOVirtualRange) * nRanges);
+ return result;
+}
+
+bool IOSubMemoryDescriptor::serialize(OSSerialize * s) const
+{
+ if (!s) {
+ return (false);
+ }
+ if (s->previouslySerialized(this)) return true;
+
+ // Pretend we are a dictionary.
+ // We must duplicate the functionality of OSDictionary here
+ // because otherwise object references will not work;
+ // they are based on the value of the object passed to
+ // previouslySerialized and addXMLStartTag.
+
+ if (!s->addXMLStartTag(this, "dict")) return false;
+
+ char const *keys[3] = {"offset", "length", "parent"};
+
+ OSObject *values[3];
+ values[0] = OSNumber::withNumber(_start, sizeof(_start) * 8);
+ if (values[0] == 0)
+ return false;
+ values[1] = OSNumber::withNumber(_length, sizeof(_length) * 8);
+ if (values[1] == 0) {
+ values[0]->release();
+ return false;
+ }
+ values[2] = _parent;
+
+ bool result = true;
+ for (int i=0; i<3; i++) {
+ if (!s->addString("<key>") ||
+ !s->addString(keys[i]) ||
+ !s->addXMLEndTag("key") ||
+ !values[i]->serialize(s)) {
+ result = false;
+ break;
+ }
+ }
+ values[0]->release();
+ values[1]->release();
+ if (!result) {
+ return false;
+ }
+
+ return s->addXMLEndTag("dict");
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
@@ -2204,3 +2489,7 @@
OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 13);
OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 14);
OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 15);
+
+/* inline function implementation */
+IOPhysicalAddress IOMemoryDescriptor::getPhysicalAddress()
+ { return( getPhysicalSegment( 0, 0 )); }