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--- xnu/xnu-792/iokit/Kernel/IOMemoryDescriptor.cpp
+++ xnu/xnu-124.1/iokit/Kernel/IOMemoryDescriptor.cpp
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 1998-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
@@ -25,283 +25,44 @@
* HISTORY
*
*/
-// 45678901234567890123456789012345678901234567890123456789012345678901234567890
-#include <sys/cdefs.h>
#include <IOKit/assert.h>
#include <IOKit/system.h>
#include <IOKit/IOLib.h>
#include <IOKit/IOMemoryDescriptor.h>
-#include <IOKit/IOMapper.h>
-#include <IOKit/IOKitKeysPrivate.h>
#include <IOKit/IOKitDebug.h>
-#include "IOKitKernelInternal.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/uio.h>
+#include <sys/cdefs.h>
__BEGIN_DECLS
#include <vm/pmap.h>
-#include <vm/vm_pageout.h>
-#include <vm/vm_shared_memory_server.h>
-#include <mach/memory_object_types.h>
-#include <device/device_port.h>
-
-#ifndef i386
-#include <mach/vm_prot.h>
-#include <vm/vm_fault.h>
-struct phys_entry *pmap_find_physentry(ppnum_t pa);
-#endif
-
-extern ppnum_t pmap_find_phys(pmap_t pmap, addr64_t va);
+void pmap_enter(pmap_t pmap, vm_offset_t va, vm_offset_t pa,
+ vm_prot_t prot, boolean_t wired);
void ipc_port_release_send(ipc_port_t port);
-
-/* Copy between a physical page and a virtual address in the given vm_map */
-kern_return_t copypv(addr64_t source, addr64_t sink, unsigned int size, int which);
-
-memory_object_t
-device_pager_setup(
- memory_object_t pager,
- 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,
- vm_object_offset_t offset,
- ppnum_t phys_addr,
- vm_size_t size);
-kern_return_t
-memory_object_iopl_request(
- ipc_port_t port,
- memory_object_offset_t offset,
- vm_size_t *upl_size,
- upl_t *upl_ptr,
- upl_page_info_array_t user_page_list,
- unsigned int *page_list_count,
- int *flags);
-
-unsigned int IOTranslateCacheBits(struct phys_entry *pp);
-
+vm_offset_t vm_map_get_phys_page(vm_map_t map, vm_offset_t offset);
__END_DECLS
-#define kIOMaximumMappedIOByteCount (512*1024*1024)
-
-static IOMapper * gIOSystemMapper;
-static ppnum_t gIOMaximumMappedIOPageCount = atop_32(kIOMaximumMappedIOByteCount);
-
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-OSDefineMetaClassAndAbstractStructors( IOMemoryDescriptor, OSObject )
+OSDefineMetaClass( IOMemoryDescriptor, OSObject )
+OSDefineAbstractStructors( IOMemoryDescriptor, OSObject )
#define super IOMemoryDescriptor
OSDefineMetaClassAndStructors(IOGeneralMemoryDescriptor, IOMemoryDescriptor)
+extern "C" vm_map_t IOPageableMapForAddress( vm_address_t address );
+
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-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)
-
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-
-class _IOMemoryMap : public IOMemoryMap
-{
- OSDeclareDefaultStructors(_IOMemoryMap)
-public:
- IOMemoryDescriptor * memory;
- IOMemoryMap * superMap;
- IOByteCount offset;
- IOByteCount length;
- IOVirtualAddress logical;
- task_t addressTask;
- vm_map_t addressMap;
- IOOptionBits options;
- upl_t redirUPL;
- ipc_port_t redirEntry;
- IOMemoryDescriptor * owner;
-
-protected:
- virtual void taggedRelease(const void *tag = 0) const;
- virtual void free();
-
-public:
-
- // IOMemoryMap methods
- virtual IOVirtualAddress getVirtualAddress();
- virtual IOByteCount getLength();
- virtual task_t getAddressTask();
- virtual IOMemoryDescriptor * getMemoryDescriptor();
- virtual IOOptionBits getMapOptions();
-
- virtual IOReturn unmap();
- virtual void taskDied();
-
- virtual IOReturn redirect(IOMemoryDescriptor * newBackingMemory,
- IOOptionBits options,
- IOByteCount offset = 0);
-
- virtual IOPhysicalAddress getPhysicalSegment(IOByteCount offset,
- IOByteCount * length);
-
- // for IOMemoryDescriptor use
- _IOMemoryMap * copyCompatible(
- IOMemoryDescriptor * owner,
- task_t intoTask,
- IOVirtualAddress toAddress,
- IOOptionBits options,
- IOByteCount offset,
- IOByteCount length );
-
- bool initCompatible(
- IOMemoryDescriptor * memory,
- IOMemoryMap * superMap,
- IOByteCount offset,
- IOByteCount length );
-
- bool initWithDescriptor(
- IOMemoryDescriptor * memory,
- task_t intoTask,
- IOVirtualAddress toAddress,
- IOOptionBits options,
- IOByteCount offset,
- IOByteCount length );
-
- IOReturn redirect(
- task_t intoTask, bool redirect );
-};
-
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-
-// Some data structures and accessor macros used by the initWithOptions
-// Function
-
-enum ioPLBlockFlags {
- kIOPLOnDevice = 0x00000001,
- kIOPLExternUPL = 0x00000002,
-};
-
-struct typePersMDData
-{
- const IOGeneralMemoryDescriptor *fMD;
- ipc_port_t fMemEntry;
-};
-
-struct ioPLBlock {
- upl_t fIOPL;
- vm_address_t fIOMDOffset; // The offset of this iopl in descriptor
- vm_offset_t fPageInfo; // Pointer to page list or index into it
- ppnum_t fMappedBase; // Page number of first page in this iopl
- unsigned int fPageOffset; // Offset within first page of iopl
- unsigned int fFlags; // Flags
-};
-
-struct ioGMDData {
- IOMapper *fMapper;
- unsigned int fPageCnt;
- upl_page_info_t fPageList[];
- ioPLBlock fBlocks[];
-};
-
-#define getDataP(osd) ((ioGMDData *) (osd)->getBytesNoCopy())
-#define getIOPLList(d) ((ioPLBlock *) &(d->fPageList[d->fPageCnt]))
-#define getNumIOPL(osd, d) \
- (((osd)->getLength() - ((char *) getIOPLList(d) - (char *) d)) / sizeof(ioPLBlock))
-#define getPageList(d) (&(d->fPageList[0]))
-#define computeDataSize(p, u) \
- (sizeof(ioGMDData) + p * sizeof(upl_page_info_t) + u * sizeof(ioPLBlock))
-
-
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-
-#define next_page(a) ( trunc_page_32(a) + PAGE_SIZE )
-
-
-extern "C" {
-
-kern_return_t device_data_action(
- int device_handle,
- ipc_port_t device_pager,
- vm_prot_t protection,
- vm_object_offset_t offset,
- vm_size_t size)
-{
- 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)
- {
- memDesc->retain();
- kr = memDesc->handleFault( device_pager, 0, 0,
- offset, size, kIOMapDefaultCache /*?*/);
- memDesc->release();
- }
+inline vm_map_t IOGeneralMemoryDescriptor::getMapForTask( task_t task, vm_address_t address )
+{
+ if( (task == kernel_task) && (kIOMemoryRequiresWire & _flags))
+ return( IOPageableMapForAddress( address ) );
else
- kr = KERN_ABORTED;
- UNLOCK;
-
- return( kr );
-}
-
-kern_return_t device_close(
- int device_handle)
-{
- 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 );
-}
-}; // end extern "C"
-
-// Note this inline function uses C++ reference arguments to return values
-// This means that pointers are not passed and NULLs don't have to be
-// checked for as a NULL reference is illegal.
-static inline void
-getAddrLenForInd(user_addr_t &addr, IOPhysicalLength &len, // Output variables
- UInt32 type, IOGeneralMemoryDescriptor::Ranges r, UInt32 ind)
-{
- assert(kIOMemoryTypePhysical == type || kIOMemoryTypeUIO == type
- || kIOMemoryTypeVirtual == type);
- if (kIOMemoryTypeUIO == type) {
- user_size_t us;
- uio_getiov((uio_t) r.uio, ind, &addr, &us); len = us;
- }
- else {
- IOVirtualRange cur = r.v[ind];
- addr = cur.address;
- len = cur.length;
- }
+ return( get_task_map( task ));
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
@@ -315,23 +76,30 @@
*/
IOMemoryDescriptor *
IOMemoryDescriptor::withAddress(void * address,
- IOByteCount length,
- IODirection direction)
-{
- return IOMemoryDescriptor::
- withAddress((vm_address_t) address, length, direction, kernel_task);
+ IOByteCount withLength,
+ IODirection withDirection)
+{
+ IOGeneralMemoryDescriptor * that = new IOGeneralMemoryDescriptor;
+ if (that)
+ {
+ if (that->initWithAddress(address, withLength, withDirection))
+ return that;
+
+ that->release();
+ }
+ return 0;
}
IOMemoryDescriptor *
IOMemoryDescriptor::withAddress(vm_address_t address,
- IOByteCount length,
- IODirection direction,
- task_t task)
+ IOByteCount withLength,
+ IODirection withDirection,
+ task_t withTask)
{
IOGeneralMemoryDescriptor * that = new IOGeneralMemoryDescriptor;
if (that)
{
- if (that->initWithAddress(address, length, direction, task))
+ if (that->initWithAddress(address, withLength, withDirection, withTask))
return that;
that->release();
@@ -342,89 +110,50 @@
IOMemoryDescriptor *
IOMemoryDescriptor::withPhysicalAddress(
IOPhysicalAddress address,
- IOByteCount length,
- IODirection direction )
-{
- IOGeneralMemoryDescriptor *self = new IOGeneralMemoryDescriptor;
- if (self
- && !self->initWithPhysicalAddress(address, length, direction)) {
- self->release();
- return 0;
- }
-
- return self;
-}
-
+ IOByteCount withLength,
+ IODirection withDirection )
+{
+ return( IOMemoryDescriptor::withAddress( address, withLength,
+ withDirection, (task_t) 0 ));
+}
+
+
+/*
+ * withRanges:
+ *
+ * Create a new IOMemoryDescriptor. The buffer is made up of several
+ * virtual address ranges, from a given task.
+ *
+ * Passing the ranges as a reference will avoid an extra allocation.
+ */
IOMemoryDescriptor *
IOMemoryDescriptor::withRanges( IOVirtualRange * ranges,
UInt32 withCount,
- IODirection direction,
- task_t task,
- bool asReference)
+ IODirection withDirection,
+ task_t withTask,
+ bool asReference = false)
{
IOGeneralMemoryDescriptor * that = new IOGeneralMemoryDescriptor;
if (that)
{
- if (that->initWithRanges(ranges, withCount, direction, task, asReference))
+ if (that->initWithRanges(ranges, withCount, withDirection, withTask, asReference))
return that;
that->release();
}
- return 0;
-}
-
-
-/*
- * withRanges:
- *
- * Create a new IOMemoryDescriptor. The buffer is made up of several
- * virtual address ranges, from a given task.
- *
- * Passing the ranges as a reference will avoid an extra allocation.
- */
-IOMemoryDescriptor *
-IOMemoryDescriptor::withOptions(void * buffers,
- UInt32 count,
- UInt32 offset,
- task_t task,
- IOOptionBits opts,
- IOMapper * mapper)
-{
- IOGeneralMemoryDescriptor *self = new IOGeneralMemoryDescriptor;
-
- if (self
- && !self->initWithOptions(buffers, count, offset, task, opts, mapper))
- {
- self->release();
- return 0;
- }
-
- return self;
-}
-
-// Can't leave abstract but this should never be used directly,
-bool IOMemoryDescriptor::initWithOptions(void * buffers,
- UInt32 count,
- UInt32 offset,
- task_t task,
- IOOptionBits options,
- IOMapper * mapper)
-{
- // @@@ gvdl: Should I panic?
- panic("IOMD::initWithOptions called\n");
return 0;
}
IOMemoryDescriptor *
IOMemoryDescriptor::withPhysicalRanges( IOPhysicalRange * ranges,
UInt32 withCount,
- IODirection direction,
- bool asReference)
+ IODirection withDirection,
+ bool asReference = false)
{
IOGeneralMemoryDescriptor * that = new IOGeneralMemoryDescriptor;
if (that)
{
- if (that->initWithPhysicalRanges(ranges, withCount, direction, asReference))
+ if (that->initWithPhysicalRanges(ranges, withCount, withDirection, asReference))
return that;
that->release();
@@ -436,96 +165,15 @@
IOMemoryDescriptor::withSubRange(IOMemoryDescriptor * of,
IOByteCount offset,
IOByteCount length,
- IODirection direction)
-{
- IOSubMemoryDescriptor *self = new IOSubMemoryDescriptor;
-
- if (self && !self->initSubRange(of, offset, length, direction)) {
- self->release();
- self = 0;
- }
- return self;
-}
-
-IOMemoryDescriptor * IOMemoryDescriptor::
- withPersistentMemoryDescriptor(IOMemoryDescriptor *originalMD)
-{
- IOGeneralMemoryDescriptor *origGenMD =
- OSDynamicCast(IOGeneralMemoryDescriptor, originalMD);
-
- if (origGenMD)
- return IOGeneralMemoryDescriptor::
- withPersistentMemoryDescriptor(origGenMD);
- else
- return 0;
-}
-
-IOMemoryDescriptor * IOGeneralMemoryDescriptor::
- withPersistentMemoryDescriptor(IOGeneralMemoryDescriptor *originalMD)
-{
- ipc_port_t sharedMem = (ipc_port_t) originalMD->createNamedEntry();
-
- if (!sharedMem)
- return 0;
-
- if (sharedMem == originalMD->_memEntry) {
- originalMD->retain(); // Add a new reference to ourselves
- ipc_port_release_send(sharedMem); // Remove extra send right
- return originalMD;
- }
-
- IOGeneralMemoryDescriptor * self = new IOGeneralMemoryDescriptor;
- typePersMDData initData = { originalMD, sharedMem };
-
- if (self
- && !self->initWithOptions(&initData, 1, 0, 0, kIOMemoryTypePersistentMD, 0)) {
- self->release();
- self = 0;
- }
- return self;
-}
-
-void *IOGeneralMemoryDescriptor::createNamedEntry()
-{
- kern_return_t error;
- ipc_port_t sharedMem;
-
- IOOptionBits type = _flags & kIOMemoryTypeMask;
-
- user_addr_t range0Addr;
- IOByteCount range0Len;
- getAddrLenForInd(range0Addr, range0Len, type, _ranges, 0);
- range0Addr = trunc_page_64(range0Addr);
-
- vm_size_t size = ptoa_32(_pages);
- vm_address_t kernelPage = (vm_address_t) range0Addr;
-
- vm_map_t theMap = ((_task == kernel_task)
- && (kIOMemoryBufferPageable & _flags))
- ? IOPageableMapForAddress(kernelPage)
- : get_task_map(_task);
-
- memory_object_size_t actualSize = size;
- vm_prot_t prot = VM_PROT_READ | VM_PROT_WRITE;
- if (_memEntry)
- prot |= MAP_MEM_NAMED_REUSE;
-
- error = mach_make_memory_entry_64(theMap,
- &actualSize, range0Addr, prot, &sharedMem, (ipc_port_t) _memEntry);
-
- if (KERN_SUCCESS == error) {
- if (actualSize == size) {
- return sharedMem;
- } else {
-#if IOASSERT
- IOLog("IOGMD::mach_make_memory_entry_64 (%08llx) size (%08lx:%08x)\n",
- (UInt64)range0Addr, (UInt32)actualSize, size);
-#endif
- ipc_port_release_send( sharedMem );
- }
- }
-
- return MACH_PORT_NULL;
+ IODirection withDirection)
+{
+ IOSubMemoryDescriptor * that = new IOSubMemoryDescriptor;
+
+ if (that && !that->initSubRange(of, offset, length, withDirection)) {
+ that->release();
+ that = 0;
+ }
+ return that;
}
/*
@@ -575,120 +223,29 @@
return initWithPhysicalRanges( &_singleRange.p, 1, withDirection, true);
}
-bool
-IOGeneralMemoryDescriptor::initWithPhysicalRanges(
- IOPhysicalRange * ranges,
- UInt32 count,
- IODirection direction,
- bool reference)
-{
- IOOptionBits mdOpts = direction | kIOMemoryTypePhysical;
-
- if (reference)
- mdOpts |= kIOMemoryAsReference;
-
- return initWithOptions(ranges, count, 0, 0, mdOpts, /* mapper */ 0);
-}
-
+/*
+ * initWithRanges:
+ *
+ * Initialize an IOMemoryDescriptor. The buffer is made up of several
+ * virtual address ranges, from a given task
+ *
+ * Passing the ranges as a reference will avoid an extra allocation.
+ *
+ * An IOMemoryDescriptor can be re-used by calling initWithAddress or
+ * initWithRanges again on an existing instance -- note this behavior
+ * is not commonly supported in other I/O Kit classes, although it is
+ * supported here.
+ */
bool
IOGeneralMemoryDescriptor::initWithRanges(
IOVirtualRange * ranges,
- UInt32 count,
- IODirection direction,
- task_t task,
- bool reference)
-{
- IOOptionBits mdOpts = direction;
-
- if (reference)
- mdOpts |= kIOMemoryAsReference;
-
- if (task) {
- mdOpts |= kIOMemoryTypeVirtual;
-
- // Auto-prepare if this is a kernel memory descriptor as very few
- // clients bother to prepare() kernel memory.
- // But it was not enforced so what are you going to do?
- if (task == kernel_task)
- mdOpts |= kIOMemoryAutoPrepare;
- }
- else
- mdOpts |= kIOMemoryTypePhysical;
-
- return initWithOptions(ranges, count, 0, task, mdOpts, /* mapper */ 0);
-}
-
-/*
- * initWithOptions:
- *
- * IOMemoryDescriptor. The buffer is made up of several virtual address ranges,
- * from a given task, several physical ranges, an UPL from the ubc
- * system or a uio (may be 64bit) from the BSD subsystem.
- *
- * Passing the ranges as a reference will avoid an extra allocation.
- *
- * An IOMemoryDescriptor can be re-used by calling initWithOptions again on an
- * existing instance -- note this behavior is not commonly supported in other
- * I/O Kit classes, although it is supported here.
- */
-
-bool
-IOGeneralMemoryDescriptor::initWithOptions(void * buffers,
- UInt32 count,
- UInt32 offset,
- task_t task,
- IOOptionBits options,
- IOMapper * mapper)
-{
- IOOptionBits type = options & kIOMemoryTypeMask;
-
- // Grab the original MD's configuation data to initialse the
- // arguments to this function.
- if (kIOMemoryTypePersistentMD == type) {
-
- typePersMDData *initData = (typePersMDData *) buffers;
- const IOGeneralMemoryDescriptor *orig = initData->fMD;
- ioGMDData *dataP = getDataP(orig->_memoryEntries);
-
- // Only accept persistent memory descriptors with valid dataP data.
- assert(orig->_rangesCount == 1);
- if ( !(orig->_flags & kIOMemoryPersistent) || !dataP)
- return false;
-
- _memEntry = initData->fMemEntry; // Grab the new named entry
- options = orig->_flags | kIOMemoryAsReference;
- _singleRange = orig->_singleRange; // Initialise our range
- buffers = &_singleRange;
- count = 1;
-
- // Now grab the original task and whatever mapper was previously used
- task = orig->_task;
- mapper = dataP->fMapper;
-
- // We are ready to go through the original initialisation now
- }
-
- switch (type) {
- case kIOMemoryTypeUIO:
- case kIOMemoryTypeVirtual:
- assert(task);
- if (!task)
- return false;
- else
- break;
-
- case kIOMemoryTypePhysical: // Neither Physical nor UPL should have a task
- mapper = kIOMapperNone;
-
- case kIOMemoryTypeUPL:
- assert(!task);
- break;
- default:
- return false; /* bad argument */
- }
-
- assert(buffers);
- assert(count);
+ UInt32 withCount,
+ IODirection withDirection,
+ task_t withTask,
+ bool asReference = false)
+{
+ assert(ranges);
+ assert(withCount);
/*
* We can check the _initialized instance variable before having ever set
@@ -696,11 +253,19 @@
* variables are zeroed on an object's allocation.
*/
- if (_initialized) {
+ if (_initialized == false)
+ {
+ if (super::init() == false) return false;
+ _initialized = true;
+ }
+ else
+ {
/*
* An existing memory descriptor is being retargeted to point to
* somewhere else. Clean up our present state.
*/
+
+ assert(_wireCount == 0);
while (_wireCount)
complete();
@@ -708,156 +273,55 @@
unmapFromKernel();
if (_ranges.v && _rangesIsAllocated)
IODelete(_ranges.v, IOVirtualRange, _rangesCount);
- if (_memEntry)
- { ipc_port_release_send((ipc_port_t) _memEntry); _memEntry = 0; }
- }
- else {
- if (!super::init())
- return false;
- _initialized = true;
- }
-
- // Grab the appropriate mapper
- if (mapper == kIOMapperNone)
- mapper = 0; // No Mapper
- else if (!mapper) {
- IOMapper::checkForSystemMapper();
- gIOSystemMapper = mapper = IOMapper::gSystem;
- }
-
- // Remove the dynamic internal use flags from the initial setting
- options &= ~(kIOMemoryPreparedReadOnly);
- _flags = options;
- _task = task;
-
- // DEPRECATED variable initialisation
- _direction = (IODirection) (_flags & kIOMemoryDirectionMask);
+ }
+
+ /*
+ * Initialize the memory descriptor.
+ */
+
+ _ranges.v = 0;
+ _rangesCount = withCount;
+ _rangesIsAllocated = asReference ? false : true;
+ _direction = withDirection;
+ _length = 0;
+ _task = withTask;
_position = 0;
+ _positionAtIndex = 0;
+ _positionAtOffset = 0;
_kernPtrAligned = 0;
_cachedPhysicalAddress = 0;
_cachedVirtualAddress = 0;
-
- if (kIOMemoryTypeUPL == type) {
-
- ioGMDData *dataP;
- unsigned int dataSize = computeDataSize(/* pages */ 0, /* upls */ 1);
-
- if (!_memoryEntries) {
- _memoryEntries = OSData::withCapacity(dataSize);
- if (!_memoryEntries)
- return false;
- }
- else if (!_memoryEntries->initWithCapacity(dataSize))
- return false;
-
- _memoryEntries->appendBytes(0, sizeof(ioGMDData));
- dataP = getDataP(_memoryEntries);
- dataP->fMapper = mapper;
- dataP->fPageCnt = 0;
-
- _wireCount++; // UPLs start out life wired
-
- _length = count;
- _pages += atop_32(offset + count + PAGE_MASK) - atop_32(offset);
-
- ioPLBlock iopl;
- upl_page_info_t *pageList = UPL_GET_INTERNAL_PAGE_LIST((upl_t) buffers);
-
- iopl.fIOPL = (upl_t) buffers;
- // Set the flag kIOPLOnDevice convieniently equal to 1
- iopl.fFlags = pageList->device | kIOPLExternUPL;
- iopl.fIOMDOffset = 0;
- if (!pageList->device) {
- // Pre-compute the offset into the UPL's page list
- pageList = &pageList[atop_32(offset)];
- offset &= PAGE_MASK;
- if (mapper) {
- iopl.fMappedBase = mapper->iovmAlloc(_pages);
- mapper->iovmInsert(iopl.fMappedBase, 0, pageList, _pages);
- }
- else
- iopl.fMappedBase = 0;
- }
- else
- iopl.fMappedBase = 0;
- iopl.fPageInfo = (vm_address_t) pageList;
- iopl.fPageOffset = offset;
-
- _memoryEntries->appendBytes(&iopl, sizeof(iopl));
- }
- else {
- // kIOMemoryTypeVirtual | kIOMemoryTypeUIO | kIOMemoryTypePhysical
-
- // Initialize the memory descriptor
- if (options & kIOMemoryAsReference) {
- _rangesIsAllocated = false;
-
- // Hack assignment to get the buffer arg into _ranges.
- // I'd prefer to do _ranges = (Ranges) buffers, but that doesn't
- // work, C++ sigh.
- // This also initialises the uio & physical ranges.
- _ranges.v = (IOVirtualRange *) buffers;
- }
- else {
- assert(kIOMemoryTypeUIO != type);
-
- _rangesIsAllocated = true;
- _ranges.v = IONew(IOVirtualRange, count);
- if (!_ranges.v)
- return false;
- bcopy(buffers, _ranges.v, count * sizeof(IOVirtualRange));
- }
-
- // Find starting address within the vector of ranges
- Ranges vec = _ranges;
- UInt32 length = 0;
- UInt32 pages = 0;
- for (unsigned ind = 0; ind < count; ind++) {
- user_addr_t addr;
- UInt32 len;
-
- // addr & len are returned by this function
- getAddrLenForInd(addr, len, type, vec, ind);
- pages += (atop_64(addr + len + PAGE_MASK) - atop_64(addr));
- len += length;
- assert(len > length); // Check for 32 bit wrap around
- length = len;
- }
- _length = length;
- _pages = pages;
- _rangesCount = count;
-
- // Auto-prepare memory at creation time.
- // Implied completion when descriptor is free-ed
- if (kIOMemoryTypePhysical == type)
- _wireCount++; // Physical MDs are, by definition, wired
- else { /* kIOMemoryTypeVirtual | kIOMemoryTypeUIO */
- ioGMDData *dataP;
- unsigned dataSize = computeDataSize(_pages, /* upls */ count * 2);
-
- if (!_memoryEntries) {
- _memoryEntries = OSData::withCapacity(dataSize);
- if (!_memoryEntries)
- return false;
- }
- else if (!_memoryEntries->initWithCapacity(dataSize))
- return false;
-
- _memoryEntries->appendBytes(0, sizeof(ioGMDData));
- dataP = getDataP(_memoryEntries);
- dataP->fMapper = mapper;
- dataP->fPageCnt = _pages;
-
- if ( (kIOMemoryPersistent & _flags) && !_memEntry)
- _memEntry = createNamedEntry();
-
- if ((_flags & kIOMemoryAutoPrepare)
- && prepare() != kIOReturnSuccess)
- return false;
- }
+ _flags = 0;
+
+ if (withTask && (withTask != kernel_task))
+ _flags |= kIOMemoryRequiresWire;
+
+ if (asReference)
+ _ranges.v = ranges;
+ else
+ {
+ _ranges.v = IONew(IOVirtualRange, withCount);
+ if (_ranges.v == 0) return false;
+ bcopy(/* from */ ranges, _ranges.v, withCount * sizeof(IOVirtualRange));
+ }
+
+ for (unsigned index = 0; index < _rangesCount; index++)
+ {
+ _length += _ranges.v[index].length;
}
return true;
+}
+
+bool
+IOGeneralMemoryDescriptor::initWithPhysicalRanges( IOPhysicalRange * ranges,
+ UInt32 withCount,
+ IODirection withDirection,
+ bool asReference = false)
+{
+#warning assuming virtual, physical addresses same size
+ return( initWithRanges( (IOVirtualRange *) ranges,
+ withCount, withDirection, (task_t) 0, asReference ));
}
/*
@@ -867,41 +331,97 @@
*/
void IOGeneralMemoryDescriptor::free()
{
- LOCK;
- if( reserved)
- reserved->memory = 0;
- UNLOCK;
-
while (_wireCount)
complete();
- if (_memoryEntries)
- _memoryEntries->release();
-
if (_kernPtrAligned)
unmapFromKernel();
if (_ranges.v && _rangesIsAllocated)
IODelete(_ranges.v, IOVirtualRange, _rangesCount);
-
- if (reserved && reserved->devicePager)
- device_pager_deallocate( (memory_object_t) reserved->devicePager );
-
- // memEntry holds a ref on the device pager which owns reserved
- // (ExpansionData) so no reserved access after this point
- if (_memEntry)
+ if( _memEntry)
ipc_port_release_send( (ipc_port_t) _memEntry );
-
super::free();
}
-/* DEPRECATED */ void IOGeneralMemoryDescriptor::unmapFromKernel()
-/* DEPRECATED */ {
- panic("IOGMD::unmapFromKernel deprecated");
-/* DEPRECATED */ }
-/* DEPRECATED */
-/* DEPRECATED */ void IOGeneralMemoryDescriptor::mapIntoKernel(unsigned rangeIndex)
-/* DEPRECATED */ {
- panic("IOGMD::mapIntoKernel deprecated");
-/* DEPRECATED */ }
+void IOGeneralMemoryDescriptor::unmapFromKernel()
+{
+ kern_return_t krtn;
+ vm_offset_t off;
+ // Pull the shared pages out of the task map
+ // Do we need to unwire it first?
+ for ( off = 0; off < _kernSize; off += page_size )
+ {
+ pmap_change_wiring(
+ kernel_pmap,
+ _kernPtrAligned + off,
+ FALSE);
+
+ pmap_remove(
+ kernel_pmap,
+ _kernPtrAligned + off,
+ _kernPtrAligned + off + page_size);
+ }
+ // Free the former shmem area in the task
+ krtn = vm_deallocate(kernel_map,
+ _kernPtrAligned,
+ _kernSize );
+ assert(krtn == KERN_SUCCESS);
+ _kernPtrAligned = 0;
+}
+
+void IOGeneralMemoryDescriptor::mapIntoKernel(unsigned rangeIndex)
+{
+ kern_return_t krtn;
+ vm_offset_t off;
+
+ if (_kernPtrAligned)
+ {
+ if (_kernPtrAtIndex == rangeIndex) return;
+ unmapFromKernel();
+ assert(_kernPtrAligned == 0);
+ }
+
+ vm_offset_t srcAlign = trunc_page(_ranges.v[rangeIndex].address);
+
+ _kernSize = trunc_page(_ranges.v[rangeIndex].address +
+ _ranges.v[rangeIndex].length +
+ page_size - 1) - srcAlign;
+
+ /* Find some memory of the same size in kernel task. We use vm_allocate()
+ to do this. vm_allocate inserts the found memory object in the
+ target task's map as a side effect. */
+ krtn = vm_allocate( kernel_map,
+ &_kernPtrAligned,
+ _kernSize,
+ VM_FLAGS_ANYWHERE|VM_MAKE_TAG(VM_MEMORY_IOKIT) ); // Find first fit
+ assert(krtn == KERN_SUCCESS);
+ if(krtn) return;
+
+ /* For each page in the area allocated from the kernel map,
+ find the physical address of the page.
+ Enter the page in the target task's pmap, at the
+ appropriate target task virtual address. */
+ for ( off = 0; off < _kernSize; off += page_size )
+ {
+ vm_offset_t kern_phys_addr, phys_addr;
+ if( _task)
+ phys_addr = pmap_extract( get_task_pmap(_task), srcAlign + off );
+ else
+ phys_addr = srcAlign + off;
+ assert(phys_addr);
+ if(phys_addr == 0) return;
+
+ // Check original state.
+ kern_phys_addr = pmap_extract( kernel_pmap, _kernPtrAligned + off );
+ // Set virtual page to point to the right physical one
+ pmap_enter(
+ kernel_pmap,
+ _kernPtrAligned + off,
+ phys_addr,
+ VM_PROT_READ|VM_PROT_WRITE,
+ TRUE);
+ }
+ _kernPtrAtIndex = rangeIndex;
+}
/*
* getDirection:
@@ -923,7 +443,8 @@
return _length;
}
-void IOMemoryDescriptor::setTag( IOOptionBits tag )
+void IOMemoryDescriptor::setTag(
+ IOOptionBits tag )
{
_tag = tag;
}
@@ -933,710 +454,317 @@
return( _tag);
}
-// @@@ gvdl: who is using this API? Seems like a wierd thing to implement.
-IOPhysicalAddress IOMemoryDescriptor::getSourceSegment( IOByteCount offset,
- IOByteCount * length )
-{
- IOPhysicalAddress physAddr = 0;
-
- if( prepare() == kIOReturnSuccess) {
- physAddr = getPhysicalSegment( offset, length );
- complete();
- }
-
- return( physAddr );
-}
-
-IOByteCount IOMemoryDescriptor::readBytes
- (IOByteCount offset, void *bytes, IOByteCount length)
-{
- addr64_t dstAddr = (addr64_t) (UInt32) bytes;
- IOByteCount remaining;
-
- // Assert that this entire I/O is withing the available range
- assert(offset < _length);
- assert(offset + length <= _length);
- if (offset >= _length) {
-IOLog("IOGMD(%p): rB = o%lx, l%lx\n", this, offset, length); // @@@ gvdl
+/*
+ * setPosition
+ *
+ * Set the logical start position inside the client buffer.
+ *
+ * It is convention that the position reflect the actual byte count that
+ * is successfully transferred into or out of the buffer, before the I/O
+ * request is "completed" (ie. sent back to its originator).
+ */
+
+void IOGeneralMemoryDescriptor::setPosition(IOByteCount position)
+{
+ assert(position <= _length);
+
+ if (position >= _length)
+ {
+ _position = _length;
+ _positionAtIndex = _rangesCount; /* careful: out-of-bounds */
+ _positionAtOffset = 0;
+ return;
+ }
+
+ if (position < _position)
+ {
+ _positionAtOffset = position;
+ _positionAtIndex = 0;
+ }
+ else
+ {
+ _positionAtOffset += (position - _position);
+ }
+ _position = position;
+
+ while (_positionAtOffset >= _ranges.v[_positionAtIndex].length)
+ {
+ _positionAtOffset -= _ranges.v[_positionAtIndex].length;
+ _positionAtIndex++;
+ }
+}
+
+/*
+ * readBytes:
+ *
+ * Copy data from the memory descriptor's buffer into the specified buffer,
+ * relative to the current position. The memory descriptor's position is
+ * advanced based on the number of bytes copied.
+ */
+
+IOByteCount IOGeneralMemoryDescriptor::readBytes(IOByteCount offset,
+ void * bytes, IOByteCount withLength)
+{
+ IOByteCount bytesLeft;
+ void * segment;
+ IOByteCount segmentLength;
+
+ if( offset != _position)
+ setPosition( offset );
+
+ withLength = min(withLength, _length - _position);
+ bytesLeft = withLength;
+
+#if 0
+ while (bytesLeft && (_position < _length))
+ {
+ /* Compute the relative length to the end of this virtual segment. */
+ segmentLength = min(_ranges.v[_positionAtIndex].length - _positionAtOffset, bytesLeft);
+
+ /* Compute the relative address of this virtual segment. */
+ segment = (void *)(_ranges.v[_positionAtIndex].address + _positionAtOffset);
+
+ if (KERN_SUCCESS != vm_map_read_user(getMapForTask(_task, segment),
+ /* from */ (vm_offset_t) segment, /* to */ (vm_offset_t) bytes,
+ /* size */ segmentLength))
+ {
+ assert( false );
+ bytesLeft = withLength;
+ break;
+ }
+ bytesLeft -= segmentLength;
+ offset += segmentLength;
+ setPosition(offset);
+ }
+#else
+ while (bytesLeft && (segment = getVirtualSegment(offset, &segmentLength)))
+ {
+ segmentLength = min(segmentLength, bytesLeft);
+ bcopy(/* from */ segment, /* to */ bytes, /* size */ segmentLength);
+ bytesLeft -= segmentLength;
+ offset += segmentLength;
+ bytes = (void *) (((UInt32) bytes) + segmentLength);
+ }
+#endif
+
+ return withLength - bytesLeft;
+}
+
+/*
+ * writeBytes:
+ *
+ * Copy data to the memory descriptor's buffer from the specified buffer,
+ * relative to the current position. The memory descriptor's position is
+ * advanced based on the number of bytes copied.
+ */
+IOByteCount IOGeneralMemoryDescriptor::writeBytes(IOByteCount offset,
+ const void* bytes,IOByteCount withLength)
+{
+ IOByteCount bytesLeft;
+ void * segment;
+ IOByteCount segmentLength;
+
+ if( offset != _position)
+ setPosition( offset );
+
+ withLength = min(withLength, _length - _position);
+ bytesLeft = withLength;
+
+#if 0
+ while (bytesLeft && (_position < _length))
+ {
+ assert(_position <= _length);
+
+ /* Compute the relative length to the end of this virtual segment. */
+ segmentLength = min(_ranges.v[_positionAtIndex].length - _positionAtOffset, bytesLeft);
+
+ /* Compute the relative address of this virtual segment. */
+ segment = (void *)(_ranges.v[_positionAtIndex].address + _positionAtOffset);
+
+ if (KERN_SUCCESS != vm_map_write_user(getMapForTask(_task, segment),
+ /* from */ (vm_offset_t) bytes,
+ /* to */ (vm_offset_t) segment,
+ /* size */ segmentLength))
+ {
+ assert( false );
+ bytesLeft = withLength;
+ break;
+ }
+ bytesLeft -= segmentLength;
+ offset += segmentLength;
+ setPosition(offset);
+ }
+#else
+ while (bytesLeft && (segment = getVirtualSegment(offset, &segmentLength)))
+ {
+ segmentLength = min(segmentLength, bytesLeft);
+ bcopy(/* from */ bytes, /* to */ segment, /* size */ segmentLength);
+ // Flush cache in case we're copying code around, eg. handling a code page fault
+ IOFlushProcessorCache(kernel_task, (vm_offset_t) segment, segmentLength );
+
+ bytesLeft -= segmentLength;
+ offset += segmentLength;
+ bytes = (void *) (((UInt32) bytes) + segmentLength);
+ }
+#endif
+
+ return withLength - bytesLeft;
+}
+
+/*
+ * getPhysicalSegment:
+ *
+ * Get the physical address of the buffer, relative to the current position.
+ * If the current position is at the end of the buffer, a zero is returned.
+ */
+IOPhysicalAddress
+IOGeneralMemoryDescriptor::getPhysicalSegment(IOByteCount offset,
+ IOByteCount * lengthOfSegment)
+{
+ vm_address_t virtualAddress;
+ IOByteCount virtualLength;
+ pmap_t virtualPMap;
+ IOPhysicalAddress physicalAddress;
+ IOPhysicalLength physicalLength;
+
+ if( kIOMemoryRequiresWire & _flags)
+ assert( _wireCount );
+
+ if ((0 == _task) && (1 == _rangesCount))
+ {
+ assert(offset <= _length);
+ if (offset >= _length)
+ {
+ physicalAddress = 0;
+ physicalLength = 0;
+ }
+ else
+ {
+ physicalLength = _length - offset;
+ physicalAddress = offset + _ranges.v[0].address;
+ }
+
+ if (lengthOfSegment)
+ *lengthOfSegment = physicalLength;
+ return physicalAddress;
+ }
+
+ if( offset != _position)
+ setPosition( offset );
+
+ assert(_position <= _length);
+
+ /* Fail gracefully if the position is at (or past) the end-of-buffer. */
+ if (_position >= _length)
+ {
+ *lengthOfSegment = 0;
return 0;
}
- remaining = length = min(length, _length - offset);
- while (remaining) { // (process another target segment?)
- addr64_t srcAddr64;
- IOByteCount srcLen;
-
- srcAddr64 = getPhysicalSegment64(offset, &srcLen);
- if (!srcAddr64)
- break;
-
- // Clip segment length to remaining
- if (srcLen > remaining)
- srcLen = remaining;
-
- copypv(srcAddr64, dstAddr, srcLen,
- cppvPsrc | cppvNoRefSrc | cppvFsnk | cppvKmap);
-
- dstAddr += srcLen;
- offset += srcLen;
- remaining -= srcLen;
- }
-
- assert(!remaining);
-
- return length - remaining;
-}
-
-IOByteCount IOMemoryDescriptor::writeBytes
- (IOByteCount offset, const void *bytes, IOByteCount length)
-{
- addr64_t srcAddr = (addr64_t) (UInt32) bytes;
- IOByteCount remaining;
-
- // Assert that this entire I/O is withing the available range
- assert(offset < _length);
- assert(offset + length <= _length);
-
- assert( !(kIOMemoryPreparedReadOnly & _flags) );
-
- if ( (kIOMemoryPreparedReadOnly & _flags) || offset >= _length) {
-IOLog("IOGMD(%p): wB = o%lx, l%lx\n", this, offset, length); // @@@ gvdl
+ /* Prepare to compute the largest contiguous physical length possible. */
+
+ virtualAddress = _ranges.v[_positionAtIndex].address + _positionAtOffset;
+ virtualLength = _ranges.v[_positionAtIndex].length - _positionAtOffset;
+ vm_address_t virtualPage = trunc_page(virtualAddress);
+ if( _task)
+ virtualPMap = get_task_pmap(_task);
+ else
+ virtualPMap = 0;
+
+ physicalAddress = (virtualAddress == _cachedVirtualAddress) ?
+ _cachedPhysicalAddress : /* optimization */
+ virtualPMap ?
+ pmap_extract(virtualPMap, virtualAddress) :
+ virtualAddress;
+ physicalLength = trunc_page(physicalAddress) + page_size - physicalAddress;
+
+ if (!physicalAddress && _task)
+ {
+ physicalAddress =
+ vm_map_get_phys_page(get_task_map(_task), virtualPage);
+ physicalAddress += virtualAddress - virtualPage;
+ }
+
+ if (physicalAddress == 0) /* memory must be wired in order to proceed */
+ {
+ assert(physicalAddress);
+ *lengthOfSegment = 0;
return 0;
}
- remaining = length = min(length, _length - offset);
- while (remaining) { // (process another target segment?)
- addr64_t dstAddr64;
- IOByteCount dstLen;
-
- dstAddr64 = getPhysicalSegment64(offset, &dstLen);
- if (!dstAddr64)
- break;
-
- // Clip segment length to remaining
- if (dstLen > remaining)
- dstLen = remaining;
-
- copypv(srcAddr, (addr64_t) dstAddr64, dstLen,
- cppvPsnk | cppvFsnk | cppvNoRefSrc | cppvNoModSnk | cppvKmap);
-
- srcAddr += dstLen;
- offset += dstLen;
- remaining -= dstLen;
- }
-
- assert(!remaining);
-
- return length - remaining;
-}
-
-// osfmk/device/iokit_rpc.c
-extern "C" unsigned int IODefaultCacheBits(addr64_t pa);
-
-/* DEPRECATED */ void IOGeneralMemoryDescriptor::setPosition(IOByteCount position)
-/* DEPRECATED */ {
- panic("IOGMD::setPosition deprecated");
-/* DEPRECATED */ }
-
-IOPhysicalAddress IOGeneralMemoryDescriptor::getPhysicalSegment
- (IOByteCount offset, IOByteCount *lengthOfSegment)
-{
- IOPhysicalAddress address = 0;
- IOPhysicalLength length = 0;
-
-// assert(offset <= _length);
- if (offset < _length) // (within bounds?)
- {
- if ( (_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical) {
- unsigned int ind;
-
- // Physical address based memory descriptor
-
- // Find offset within descriptor and make it relative
- // to the current _range.
- for (ind = 0 ; offset >= _ranges.p[ind].length; ind++ )
- offset -= _ranges.p[ind].length;
-
- IOPhysicalRange cur = _ranges.p[ind];
- address = cur.address + offset;
- length = cur.length - offset;
-
- // see how far we can coalesce ranges
- for (++ind; ind < _rangesCount; ind++) {
- cur = _ranges.p[ind];
-
- if (address + length != cur.address)
- break;
-
- length += cur.length;
- }
-
- // @@@ gvdl: should be assert(address);
- // but can't as NVidia GeForce creates a bogus physical mem
- assert(address
- || /* nvidia */ (!_ranges.p[0].address && 1 == _rangesCount));
- assert(length);
- }
- else do {
- // We need wiring & we are wired.
- assert(_wireCount);
-
- if (!_wireCount)
- {
- panic("IOGMD: not wired for getPhysicalSegment()");
- continue;
- }
-
- assert(_memoryEntries);
-
- ioGMDData * dataP = getDataP(_memoryEntries);
- const ioPLBlock *ioplList = getIOPLList(dataP);
- UInt ind, numIOPLs = getNumIOPL(_memoryEntries, dataP);
- upl_page_info_t *pageList = getPageList(dataP);
-
- assert(numIOPLs > 0);
-
- // Scan through iopl info blocks looking for block containing offset
- for (ind = 1; ind < numIOPLs; ind++) {
- if (offset < ioplList[ind].fIOMDOffset)
- break;
- }
-
- // Go back to actual range as search goes past it
- ioPLBlock ioplInfo = ioplList[ind - 1];
-
- if (ind < numIOPLs)
- length = ioplList[ind].fIOMDOffset;
- else
- length = _length;
- length -= offset; // Remainder within iopl
-
- // Subtract offset till this iopl in total list
- offset -= ioplInfo.fIOMDOffset;
-
- // This is a mapped IOPL so we just need to compute an offset
- // relative to the mapped base.
- if (ioplInfo.fMappedBase) {
- offset += (ioplInfo.fPageOffset & PAGE_MASK);
- address = ptoa_32(ioplInfo.fMappedBase) + offset;
- continue;
- }
-
- // Currently the offset is rebased into the current iopl.
- // Now add the iopl 1st page offset.
- offset += ioplInfo.fPageOffset;
-
- // For external UPLs the fPageInfo field points directly to
- // the upl's upl_page_info_t array.
- if (ioplInfo.fFlags & kIOPLExternUPL)
- pageList = (upl_page_info_t *) ioplInfo.fPageInfo;
- else
- pageList = &pageList[ioplInfo.fPageInfo];
-
- // Check for direct device non-paged memory
- if ( ioplInfo.fFlags & kIOPLOnDevice ) {
- address = ptoa_32(pageList->phys_addr) + offset;
- continue;
- }
-
- // Now we need compute the index into the pageList
- ind = atop_32(offset);
- offset &= PAGE_MASK;
-
- IOPhysicalAddress pageAddr = pageList[ind].phys_addr;
- address = ptoa_32(pageAddr) + offset;
-
- // Check for the remaining data in this upl being longer than the
- // remainder on the current page. This should be checked for
- // contiguous pages
- if (length > PAGE_SIZE - offset) {
- // See if the next page is contiguous. Stop looking when we hit
- // the end of this upl, which is indicated by the
- // contigLength >= length.
- IOByteCount contigLength = PAGE_SIZE - offset;
-
- // Look for contiguous segment
- while (contigLength < length
- && ++pageAddr == pageList[++ind].phys_addr) {
- contigLength += PAGE_SIZE;
- }
- if (length > contigLength)
- length = contigLength;
- }
-
- assert(address);
- assert(length);
-
- } while (0);
-
- if (!address)
- length = 0;
- }
-
- if (lengthOfSegment)
- *lengthOfSegment = length;
-
- return address;
-}
-
-addr64_t IOMemoryDescriptor::getPhysicalSegment64
- (IOByteCount offset, IOByteCount *lengthOfSegment)
-{
- IOPhysicalAddress phys32;
- IOByteCount length;
- addr64_t phys64;
-
- phys32 = getPhysicalSegment(offset, lengthOfSegment);
- if (!phys32)
- return 0;
-
- if (gIOSystemMapper)
- {
- IOByteCount origLen;
-
- phys64 = gIOSystemMapper->mapAddr(phys32);
- origLen = *lengthOfSegment;
- length = page_size - (phys64 & (page_size - 1));
- while ((length < origLen)
- && ((phys64 + length) == gIOSystemMapper->mapAddr(phys32 + length)))
- length += page_size;
- if (length > origLen)
- length = origLen;
-
- *lengthOfSegment = length;
- }
+ /* Compute the largest contiguous physical length possible, within range. */
+ IOPhysicalAddress physicalPage = trunc_page(physicalAddress);
+
+ while (physicalLength < virtualLength)
+ {
+ physicalPage += page_size;
+ virtualPage += page_size;
+ _cachedVirtualAddress = virtualPage;
+ _cachedPhysicalAddress = virtualPMap ?
+ pmap_extract(virtualPMap, virtualPage) :
+ virtualPage;
+ if (!_cachedPhysicalAddress && _task)
+ {
+ _cachedPhysicalAddress =
+ vm_map_get_phys_page(get_task_map(_task), virtualPage);
+ }
+
+ if (_cachedPhysicalAddress != physicalPage) break;
+
+ physicalLength += page_size;
+ }
+
+ /* Clip contiguous physical length at the end of this range. */
+ if (physicalLength > virtualLength)
+ physicalLength = virtualLength;
+
+ if( lengthOfSegment)
+ *lengthOfSegment = physicalLength;
+
+ return physicalAddress;
+}
+
+
+/*
+ * getVirtualSegment:
+ *
+ * Get the virtual address of the buffer, relative to the current position.
+ * If the memory wasn't mapped into the caller's address space, it will be
+ * mapped in now. If the current position is at the end of the buffer, a
+ * null is returned.
+ */
+void * IOGeneralMemoryDescriptor::getVirtualSegment(IOByteCount offset,
+ IOByteCount * lengthOfSegment)
+{
+ if( offset != _position)
+ setPosition( offset );
+
+ assert(_position <= _length);
+
+ /* Fail gracefully if the position is at (or past) the end-of-buffer. */
+ if (_position >= _length)
+ {
+ *lengthOfSegment = 0;
+ return 0;
+ }
+
+ /* Compute the relative length to the end of this virtual segment. */
+ *lengthOfSegment = _ranges.v[_positionAtIndex].length - _positionAtOffset;
+
+ /* Compute the relative address of this virtual segment. */
+ if (_task == kernel_task)
+ return (void *)(_ranges.v[_positionAtIndex].address + _positionAtOffset);
else
- phys64 = (addr64_t) phys32;
-
- return phys64;
-}
-
-IOPhysicalAddress IOGeneralMemoryDescriptor::
-getSourceSegment(IOByteCount offset, IOByteCount *lengthOfSegment)
-{
- IOPhysicalAddress address = 0;
- IOPhysicalLength length = 0;
- IOOptionBits type = _flags & kIOMemoryTypeMask;
-
- assert(offset <= _length);
-
- if ( type == kIOMemoryTypeUPL)
- return super::getSourceSegment( offset, lengthOfSegment );
- else if ( offset < _length ) // (within bounds?)
- {
- unsigned rangesIndex = 0;
- Ranges vec = _ranges;
- user_addr_t addr;
-
- // Find starting address within the vector of ranges
- for (;;) {
- getAddrLenForInd(addr, length, type, vec, rangesIndex);
- if (offset < length)
- break;
- offset -= length; // (make offset relative)
- rangesIndex++;
- }
-
- // Now that we have the starting range,
- // lets find the last contiguous range
- addr += offset;
- length -= offset;
-
- for ( ++rangesIndex; rangesIndex < _rangesCount; rangesIndex++ ) {
- user_addr_t newAddr;
- IOPhysicalLength newLen;
-
- getAddrLenForInd(newAddr, newLen, type, vec, rangesIndex);
- if (addr + length != newAddr)
- break;
- length += newLen;
- }
- if (addr)
- address = (IOPhysicalAddress) addr; // Truncate address to 32bit
- else
- length = 0;
- }
-
- if ( lengthOfSegment ) *lengthOfSegment = length;
-
- return address;
-}
-
-/* DEPRECATED */ /* USE INSTEAD: map(), readBytes(), writeBytes() */
-/* DEPRECATED */ void * IOGeneralMemoryDescriptor::getVirtualSegment(IOByteCount offset,
-/* DEPRECATED */ IOByteCount * lengthOfSegment)
-/* DEPRECATED */ {
- if (_task == kernel_task)
- return (void *) getSourceSegment(offset, lengthOfSegment);
- else
- panic("IOGMD::getVirtualSegment deprecated");
-
- return 0;
-/* DEPRECATED */ }
-/* DEPRECATED */ /* USE INSTEAD: map(), readBytes(), writeBytes() */
-
-
-
-IOReturn IOMemoryDescriptor::setPurgeable( IOOptionBits newState,
- IOOptionBits * oldState )
-{
- IOReturn err = kIOReturnSuccess;
- vm_purgable_t control;
- int state;
-
- do
- {
- if (!_memEntry)
- {
- err = kIOReturnNotReady;
- break;
- }
-
- control = VM_PURGABLE_SET_STATE;
- switch (newState)
- {
- case kIOMemoryPurgeableKeepCurrent:
- control = VM_PURGABLE_GET_STATE;
- break;
-
- case kIOMemoryPurgeableNonVolatile:
- state = VM_PURGABLE_NONVOLATILE;
- break;
- case kIOMemoryPurgeableVolatile:
- state = VM_PURGABLE_VOLATILE;
- break;
- case kIOMemoryPurgeableEmpty:
- state = VM_PURGABLE_EMPTY;
- break;
- default:
- err = kIOReturnBadArgument;
- break;
- }
-
- if (kIOReturnSuccess != err)
- break;
-
- err = mach_memory_entry_purgable_control((ipc_port_t) _memEntry, control, &state);
-
- if (oldState)
- {
- if (kIOReturnSuccess == err)
- {
- switch (state)
- {
- case VM_PURGABLE_NONVOLATILE:
- state = kIOMemoryPurgeableNonVolatile;
- break;
- case VM_PURGABLE_VOLATILE:
- state = kIOMemoryPurgeableVolatile;
- break;
- case VM_PURGABLE_EMPTY:
- state = kIOMemoryPurgeableEmpty;
- break;
- default:
- state = kIOMemoryPurgeableNonVolatile;
- err = kIOReturnNotReady;
- break;
- }
- *oldState = state;
- }
- }
- }
- while (false);
-
- return (err);
-}
-
-extern "C" void dcache_incoherent_io_flush64(addr64_t pa, unsigned int count);
-extern "C" void dcache_incoherent_io_store64(addr64_t pa, unsigned int count);
-
-IOReturn IOMemoryDescriptor::performOperation( IOOptionBits options,
- IOByteCount offset, IOByteCount length )
-{
- IOByteCount remaining;
- void (*func)(addr64_t pa, unsigned int count) = 0;
-
- switch (options)
- {
- case kIOMemoryIncoherentIOFlush:
- func = &dcache_incoherent_io_flush64;
- break;
- case kIOMemoryIncoherentIOStore:
- func = &dcache_incoherent_io_store64;
- break;
- }
-
- if (!func)
- return (kIOReturnUnsupported);
-
- remaining = length = min(length, getLength() - offset);
- while (remaining)
- // (process another target segment?)
- {
- addr64_t dstAddr64;
- IOByteCount dstLen;
-
- dstAddr64 = getPhysicalSegment64(offset, &dstLen);
- if (!dstAddr64)
- break;
-
- // Clip segment length to remaining
- if (dstLen > remaining)
- dstLen = remaining;
-
- (*func)(dstAddr64, dstLen);
-
- offset += dstLen;
- remaining -= dstLen;
- }
-
- return (remaining ? kIOReturnUnderrun : kIOReturnSuccess);
-}
-
-#ifdef __ppc__
-extern vm_offset_t static_memory_end;
-#define io_kernel_static_end static_memory_end
-#else
-extern vm_offset_t first_avail;
-#define io_kernel_static_end first_avail
-#endif
-
-static kern_return_t
-io_get_kernel_static_upl(
- vm_map_t /* map */,
- vm_address_t offset,
- vm_size_t *upl_size,
- upl_t *upl,
- upl_page_info_array_t page_list,
- unsigned int *count)
-{
- unsigned int pageCount, page;
- ppnum_t phys;
-
- pageCount = atop_32(*upl_size);
- if (pageCount > *count)
- pageCount = *count;
-
- *upl = NULL;
-
- for (page = 0; page < pageCount; page++)
- {
- phys = pmap_find_phys(kernel_pmap, ((addr64_t)offset) + ptoa_64(page));
- if (!phys)
- break;
- page_list[page].phys_addr = phys;
- page_list[page].pageout = 0;
- page_list[page].absent = 0;
- page_list[page].dirty = 0;
- page_list[page].precious = 0;
- page_list[page].device = 0;
- }
-
- return ((page >= pageCount) ? kIOReturnSuccess : kIOReturnVMError);
-}
-
-IOReturn IOGeneralMemoryDescriptor::wireVirtual(IODirection forDirection)
-{
- IOOptionBits type = _flags & kIOMemoryTypeMask;
- IOReturn error = kIOReturnNoMemory;
- ioGMDData *dataP;
- ppnum_t mapBase = 0;
- IOMapper *mapper;
- ipc_port_t sharedMem = (ipc_port_t) _memEntry;
-
- assert(!_wireCount);
- assert(kIOMemoryTypeVirtual == type || kIOMemoryTypeUIO == type);
-
- if (_pages >= gIOMaximumMappedIOPageCount)
- return kIOReturnNoResources;
-
- dataP = getDataP(_memoryEntries);
- mapper = dataP->fMapper;
- if (mapper && _pages)
- mapBase = mapper->iovmAlloc(_pages);
-
- // Note that appendBytes(NULL) zeros the data up to the
- // desired length.
- _memoryEntries->appendBytes(0, dataP->fPageCnt * sizeof(upl_page_info_t));
- dataP = 0; // May no longer be valid so lets not get tempted.
-
- if (forDirection == kIODirectionNone)
- forDirection = _direction;
-
- int uplFlags; // This Mem Desc's default flags for upl creation
- switch (forDirection)
- {
- case kIODirectionOut:
- // Pages do not need to be marked as dirty on commit
- uplFlags = UPL_COPYOUT_FROM;
- _flags |= kIOMemoryPreparedReadOnly;
- break;
-
- case kIODirectionIn:
- default:
- uplFlags = 0; // i.e. ~UPL_COPYOUT_FROM
- break;
- }
- uplFlags |= UPL_SET_IO_WIRE | UPL_SET_LITE;
-
- // Find the appropriate vm_map for the given task
- vm_map_t curMap;
- if (_task == kernel_task && (kIOMemoryBufferPageable & _flags))
- curMap = 0;
- else
- { curMap = get_task_map(_task); }
-
- // Iterate over the vector of virtual ranges
- Ranges vec = _ranges;
- unsigned int pageIndex = 0;
- IOByteCount mdOffset = 0;
- for (UInt range = 0; range < _rangesCount; range++) {
- ioPLBlock iopl;
- user_addr_t startPage;
- IOByteCount numBytes;
-
- // Get the startPage address and length of vec[range]
- getAddrLenForInd(startPage, numBytes, type, vec, range);
- iopl.fPageOffset = (short) startPage & PAGE_MASK;
- numBytes += iopl.fPageOffset;
- startPage = trunc_page_64(startPage);
-
- if (mapper)
- iopl.fMappedBase = mapBase + pageIndex;
- else
- iopl.fMappedBase = 0;
-
- // Iterate over the current range, creating UPLs
- while (numBytes) {
- dataP = getDataP(_memoryEntries);
- vm_address_t kernelStart = (vm_address_t) startPage;
- vm_map_t theMap;
- if (curMap)
- theMap = curMap;
- else if (!sharedMem) {
- assert(_task == kernel_task);
- theMap = IOPageableMapForAddress(kernelStart);
- }
- else
- theMap = NULL;
-
- upl_page_info_array_t pageInfo = getPageList(dataP);
- int ioplFlags = uplFlags;
- upl_page_list_ptr_t baseInfo = &pageInfo[pageIndex];
-
- vm_size_t ioplSize = round_page_32(numBytes);
- unsigned int numPageInfo = atop_32(ioplSize);
-
- if (theMap == kernel_map && kernelStart < io_kernel_static_end) {
- error = io_get_kernel_static_upl(theMap,
- kernelStart,
- &ioplSize,
- &iopl.fIOPL,
- baseInfo,
- &numPageInfo);
- }
- else if (sharedMem) {
- error = memory_object_iopl_request(sharedMem,
- ptoa_32(pageIndex),
- &ioplSize,
- &iopl.fIOPL,
- baseInfo,
- &numPageInfo,
- &ioplFlags);
- }
- else {
- assert(theMap);
- error = vm_map_create_upl(theMap,
- startPage,
- &ioplSize,
- &iopl.fIOPL,
- baseInfo,
- &numPageInfo,
- &ioplFlags);
- }
-
- assert(ioplSize);
- if (error != KERN_SUCCESS)
- goto abortExit;
-
- error = kIOReturnNoMemory;
-
- if (baseInfo->device) {
- numPageInfo = 1;
- iopl.fFlags = kIOPLOnDevice;
- // Don't translate device memory at all
- if (mapper && mapBase) {
- mapper->iovmFree(mapBase, _pages);
- mapBase = 0;
- iopl.fMappedBase = 0;
- }
- }
- else {
- iopl.fFlags = 0;
- if (mapper)
- mapper->iovmInsert(mapBase, pageIndex,
- baseInfo, numPageInfo);
- }
-
- iopl.fIOMDOffset = mdOffset;
- iopl.fPageInfo = pageIndex;
-
- if ((_flags & kIOMemoryAutoPrepare) && iopl.fIOPL)
- {
- upl_commit(iopl.fIOPL, 0, 0);
- upl_deallocate(iopl.fIOPL);
- iopl.fIOPL = 0;
- }
-
- if (!_memoryEntries->appendBytes(&iopl, sizeof(iopl))) {
- // Clean up partial created and unsaved iopl
- if (iopl.fIOPL) {
- upl_abort(iopl.fIOPL, 0);
- upl_deallocate(iopl.fIOPL);
- }
- goto abortExit;
- }
-
- // Check for a multiple iopl's in one virtual range
- pageIndex += numPageInfo;
- mdOffset -= iopl.fPageOffset;
- if (ioplSize < numBytes) {
- numBytes -= ioplSize;
- startPage += ioplSize;
- mdOffset += ioplSize;
- iopl.fPageOffset = 0;
- if (mapper)
- iopl.fMappedBase = mapBase + pageIndex;
- }
- else {
- mdOffset += numBytes;
- break;
- }
- }
- }
-
- return kIOReturnSuccess;
-
-abortExit:
- {
- dataP = getDataP(_memoryEntries);
- UInt done = getNumIOPL(_memoryEntries, dataP);
- ioPLBlock *ioplList = getIOPLList(dataP);
-
- for (UInt range = 0; range < done; range++)
- {
- if (ioplList[range].fIOPL) {
- upl_abort(ioplList[range].fIOPL, 0);
- upl_deallocate(ioplList[range].fIOPL);
- }
- }
- (void) _memoryEntries->initWithBytes(dataP, sizeof(ioGMDData)); // == setLength()
-
- if (mapper && mapBase)
- mapper->iovmFree(mapBase, _pages);
- }
-
- return error;
+ {
+ vm_offset_t off;
+
+ mapIntoKernel(_positionAtIndex);
+
+ off = _ranges.v[_kernPtrAtIndex].address;
+ off -= trunc_page(off);
+
+ return (void *) (_kernPtrAligned + off + _positionAtOffset);
+ }
}
/*
@@ -1648,21 +776,137 @@
* the memory after the I/O transfer finishes. This method needn't
* called for non-pageable memory.
*/
-IOReturn IOGeneralMemoryDescriptor::prepare(IODirection forDirection)
-{
- IOReturn error = kIOReturnSuccess;
- IOOptionBits type = _flags & kIOMemoryTypeMask;
-
- if (!_wireCount
- && (kIOMemoryTypeVirtual == type || kIOMemoryTypeUIO == type) ) {
- error = wireVirtual(forDirection);
- if (error)
- return error;
- }
-
+IOReturn IOGeneralMemoryDescriptor::prepare(
+ IODirection forDirection = kIODirectionNone)
+{
+ UInt rangeIndex = 0;
+
+ if((_wireCount == 0) && (kIOMemoryRequiresWire & _flags)) {
+ kern_return_t rc;
+
+ if(forDirection == kIODirectionNone)
+ forDirection = _direction;
+
+ vm_prot_t access = VM_PROT_DEFAULT; // Could be cleverer using direction
+
+ //
+ // Check user read/write access to the data buffer.
+ //
+
+ for (rangeIndex = 0; rangeIndex < _rangesCount; rangeIndex++)
+ {
+ vm_offset_t checkBase = trunc_page(_ranges.v[rangeIndex].address);
+ vm_size_t checkSize = round_page(_ranges.v[rangeIndex].length );
+
+ while (checkSize)
+ {
+ vm_region_basic_info_data_t regionInfo;
+ mach_msg_type_number_t regionInfoSize = sizeof(regionInfo);
+ vm_size_t regionSize;
+
+ if ( (vm_region(
+ /* map */ getMapForTask(_task, checkBase),
+ /* address */ &checkBase,
+ /* size */ ®ionSize,
+ /* flavor */ VM_REGION_BASIC_INFO,
+ /* info */ (vm_region_info_t) ®ionInfo,
+ /* info size */ ®ionInfoSize,
+ /* object name */ 0 ) != KERN_SUCCESS ) ||
+ ( (forDirection & kIODirectionIn ) &&
+ !(regionInfo.protection & VM_PROT_WRITE) ) ||
+ ( (forDirection & kIODirectionOut) &&
+ !(regionInfo.protection & VM_PROT_READ ) ) )
+ {
+ return kIOReturnVMError;
+ }
+
+ assert((regionSize & PAGE_MASK) == 0);
+
+ regionSize = min(regionSize, checkSize);
+ checkSize -= regionSize;
+ checkBase += regionSize;
+ } // (for each vm region)
+ } // (for each io range)
+
+ for (rangeIndex = 0; rangeIndex < _rangesCount; rangeIndex++) {
+
+ vm_offset_t srcAlign = trunc_page(_ranges.v[rangeIndex].address);
+ IOByteCount srcAlignEnd = trunc_page(_ranges.v[rangeIndex].address +
+ _ranges.v[rangeIndex].length +
+ page_size - 1);
+
+ vm_map_t taskVMMap = getMapForTask(_task, srcAlign);
+
+ rc = vm_map_wire(taskVMMap, srcAlign, srcAlignEnd, access, FALSE);
+ if (KERN_SUCCESS != rc) {
+ IOLog("IOMemoryDescriptor::prepare vm_map_wire failed: %d\n", rc);
+ goto abortExit;
+ }
+
+ // If this I/O is for a user land task then protect ourselves
+ // against COW and other vm_shenanigans
+ if (_task && _task != kernel_task) {
+ // setup a data object to hold the 'named' memory regions
+ // @@@ gvdl: If we fail to allocate an OSData we will just
+ // hope for the best for the time being. Lets not fail a
+ // prepare at this late stage in product release.
+ if (!_memoryEntries)
+ _memoryEntries = OSData::withCapacity(16);
+ if (_memoryEntries) {
+ vm_object_offset_t desiredSize = srcAlignEnd - srcAlign;
+ vm_object_offset_t entryStart = srcAlign;
+ ipc_port_t memHandle;
+
+ do {
+ vm_object_offset_t actualSize = desiredSize;
+
+ rc = mach_make_memory_entry_64
+ (taskVMMap, &actualSize, entryStart,
+ forDirection, &memHandle, NULL);
+ if (KERN_SUCCESS != rc) {
+ IOLog("IOMemoryDescriptor::prepare mach_make_memory_entry_64 failed: %d\n", rc);
+ goto abortExit;
+ }
+
+ _memoryEntries->
+ appendBytes(&memHandle, sizeof(memHandle));
+ desiredSize -= actualSize;
+ entryStart += actualSize;
+ } while (desiredSize);
+ }
+ }
+ }
+ }
_wireCount++;
-
return kIOReturnSuccess;
+
+abortExit:
+ UInt doneIndex;
+
+
+ for(doneIndex = 0; doneIndex < rangeIndex; doneIndex++) {
+ vm_offset_t srcAlign = trunc_page(_ranges.v[doneIndex].address);
+ IOByteCount srcAlignEnd = trunc_page(_ranges.v[doneIndex].address +
+ _ranges.v[doneIndex].length +
+ page_size - 1);
+
+ vm_map_unwire(getMapForTask(_task, srcAlign), srcAlign,
+ srcAlignEnd, FALSE);
+ }
+
+ if (_memoryEntries) {
+ ipc_port_t *handles, *handlesEnd;
+
+ handles = (ipc_port_t *) _memoryEntries->getBytesNoCopy();
+ handlesEnd = (ipc_port_t *)
+ ((vm_address_t) handles + _memoryEntries->getLength());
+ while (handles < handlesEnd)
+ ipc_port_release_send(*handles++);
+ _memoryEntries->release();
+ _memoryEntries = 0;
+ }
+
+ return kIOReturnVMError;
}
/*
@@ -1674,40 +918,52 @@
* before and after an I/O transfer involving pageable memory.
*/
-IOReturn IOGeneralMemoryDescriptor::complete(IODirection /* forDirection */)
+IOReturn IOGeneralMemoryDescriptor::complete(
+ IODirection forDirection = kIODirectionNone)
{
assert(_wireCount);
- if (!_wireCount)
+ if(0 == _wireCount)
return kIOReturnSuccess;
_wireCount--;
- if (!_wireCount) {
- IOOptionBits type = _flags & kIOMemoryTypeMask;
-
- if (kIOMemoryTypePhysical == type) {
- /* kIOMemoryTypePhysical */
- // DO NOTHING
+ if((_wireCount == 0) && (kIOMemoryRequiresWire & _flags)) {
+ UInt rangeIndex;
+ kern_return_t rc;
+
+ if(forDirection == kIODirectionNone)
+ forDirection = _direction;
+
+ for(rangeIndex = 0; rangeIndex < _rangesCount; rangeIndex++) {
+
+ vm_offset_t srcAlign = trunc_page(_ranges.v[rangeIndex].address);
+ IOByteCount srcAlignEnd = trunc_page(_ranges.v[rangeIndex].address +
+ _ranges.v[rangeIndex].length +
+ page_size - 1);
+
+ if(forDirection == kIODirectionIn)
+ pmap_modify_pages(get_task_pmap(_task), srcAlign, srcAlignEnd);
+
+ rc = vm_map_unwire(getMapForTask(_task, srcAlign), srcAlign,
+ srcAlignEnd, FALSE);
+ if(rc != KERN_SUCCESS)
+ IOLog("IOMemoryDescriptor::complete: vm_map_unwire failed: %d\n", rc);
}
- else {
- ioGMDData * dataP = getDataP(_memoryEntries);
- ioPLBlock *ioplList = getIOPLList(dataP);
- UInt count = getNumIOPL(_memoryEntries, dataP);
-
- if (dataP->fMapper && _pages && ioplList[0].fMappedBase)
- dataP->fMapper->iovmFree(ioplList[0].fMappedBase, _pages);
-
- // Only complete iopls that we created which are for TypeVirtual
- if (kIOMemoryTypeVirtual == type || kIOMemoryTypeUIO == type) {
- for (UInt ind = 0; ind < count; ind++)
- if (ioplList[ind].fIOPL) {
- upl_commit(ioplList[ind].fIOPL, 0, 0);
- upl_deallocate(ioplList[ind].fIOPL);
- }
- }
-
- (void) _memoryEntries->initWithBytes(dataP, sizeof(ioGMDData)); // == setLength()
- }
+
+ if (_memoryEntries) {
+ ipc_port_t *handles, *handlesEnd;
+
+ handles = (ipc_port_t *) _memoryEntries->getBytesNoCopy();
+ handlesEnd = (ipc_port_t *)
+ ((vm_address_t) handles + _memoryEntries->getLength());
+ while (handles < handlesEnd)
+ ipc_port_release_send(*handles++);
+
+ _memoryEntries->release();
+ _memoryEntries = 0;
+ }
+
+ _cachedVirtualAddress = 0;
}
return kIOReturnSuccess;
}
@@ -1716,142 +972,66 @@
vm_map_t addressMap,
IOVirtualAddress * atAddress,
IOOptionBits options,
- IOByteCount sourceOffset,
- IOByteCount length )
+ IOByteCount sourceOffset = 0,
+ IOByteCount length = 0 )
{
kern_return_t kr;
- ipc_port_t sharedMem = (ipc_port_t) _memEntry;
-
- IOOptionBits type = _flags & kIOMemoryTypeMask;
- Ranges vec = _ranges;
-
- user_addr_t range0Addr = 0;
- IOByteCount range0Len = 0;
-
- if (vec.v)
- getAddrLenForInd(range0Addr, range0Len, type, vec, 0);
// mapping source == dest? (could be much better)
- if( _task
- && (addressMap == get_task_map(_task)) && (options & kIOMapAnywhere)
- && (1 == _rangesCount) && (0 == sourceOffset)
- && range0Addr && (length <= range0Len) ) {
- if (sizeof(user_addr_t) > 4 && ((UInt64) range0Addr) >> 32)
- return kIOReturnOverrun; // Doesn't fit in 32bit return field
- else {
- *atAddress = range0Addr;
+ if( _task && (addressMap == get_task_map(_task)) && (options & kIOMapAnywhere)
+ && (1 == _rangesCount) && (0 == sourceOffset)
+ && (length <= _ranges.v[0].length) ) {
+ *atAddress = _ranges.v[0].address;
return( kIOReturnSuccess );
- }
- }
-
- if( 0 == sharedMem) {
-
- vm_size_t size = ptoa_32(_pages);
-
- if( _task) {
-#ifndef i386
- memory_object_size_t actualSize = size;
- kr = mach_make_memory_entry_64(get_task_map(_task),
- &actualSize, range0Addr,
- VM_PROT_READ | VM_PROT_WRITE, &sharedMem,
- NULL );
-
- if( (KERN_SUCCESS == kr) && (actualSize != round_page_32(size))) {
-#if IOASSERT
- IOLog("mach_make_memory_entry_64 (%08llx) size (%08lx:%08x)\n",
- range0Addr, (UInt32) actualSize, size);
-#endif
+ }
+
+ if( _task && _memEntry && (_flags & kIOMemoryRequiresWire)) {
+
+ do {
+
+ if( (1 != _rangesCount)
+ || (kIOMapDefaultCache != (options & kIOMapCacheMask)) ) {
+ kr = kIOReturnUnsupported;
+ continue;
+ }
+
+ if( 0 == length)
+ length = getLength();
+ if( (sourceOffset + length) > _ranges.v[0].length) {
+ kr = kIOReturnBadArgument;
+ continue;
+ }
+
+ ipc_port_t sharedMem = (ipc_port_t) _memEntry;
+ vm_prot_t prot = VM_PROT_READ
+ | ((options & kIOMapReadOnly) ? 0 : VM_PROT_WRITE);
+
+ // vm_map looks for addresses above here, even when VM_FLAGS_ANYWHERE
+ if( options & kIOMapAnywhere)
+ *atAddress = 0;
+
+ if( 0 == sharedMem)
kr = kIOReturnVMError;
- ipc_port_release_send( sharedMem );
- }
-
- if( KERN_SUCCESS != kr)
-#endif /* !i386 */
- sharedMem = MACH_PORT_NULL;
-
- } else do {
-
- memory_object_t pager;
- unsigned int flags = 0;
- addr64_t pa;
- IOPhysicalLength segLen;
-
- pa = getPhysicalSegment64( sourceOffset, &segLen );
-
- if( !reserved) {
- reserved = IONew( ExpansionData, 1 );
- if( !reserved)
- continue;
- }
- reserved->pagerContig = (1 == _rangesCount);
- reserved->memory = this;
-
- /*What cache mode do we need*/
- switch(options & kIOMapCacheMask ) {
-
- case kIOMapDefaultCache:
- default:
- flags = IODefaultCacheBits(pa);
- 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;
-
- case kIOMapWriteCombineCache:
- flags = DEVICE_PAGER_CACHE_INHIB |
- DEVICE_PAGER_COHERENT;
- break;
- }
-
- flags |= reserved->pagerContig ? DEVICE_PAGER_CONTIGUOUS : 0;
-
- pager = device_pager_setup( (memory_object_t) 0, (int) reserved,
- size, flags);
- assert( pager );
-
- if( pager) {
- 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) {
- device_pager_deallocate( pager );
- pager = MACH_PORT_NULL;
- sharedMem = MACH_PORT_NULL;
- }
- }
- if( pager && sharedMem)
- reserved->devicePager = pager;
- else {
- IODelete( reserved, ExpansionData, 1 );
- reserved = 0;
- }
-
+ else
+ kr = KERN_SUCCESS;
+
+ if( KERN_SUCCESS == kr)
+ kr = vm_map( addressMap,
+ atAddress,
+ length, 0 /* mask */,
+ (( options & kIOMapAnywhere ) ? VM_FLAGS_ANYWHERE : VM_FLAGS_FIXED)
+ | VM_MAKE_TAG(VM_MEMORY_IOKIT),
+ sharedMem, sourceOffset,
+ false, // copy
+ prot, // cur
+ prot, // max
+ VM_INHERIT_NONE);
+
} while( false );
- _memEntry = (void *) sharedMem;
- }
-
-
-#ifndef i386
- if( 0 == sharedMem)
- kr = kIOReturnVMError;
- else
-#endif
- kr = super::doMap( addressMap, atAddress,
+ } else
+ kr = super::doMap( addressMap, atAddress,
options, sourceOffset, length );
-
return( kr );
}
@@ -1861,28 +1041,90 @@
IOByteCount length )
{
// could be much better
- if( _task && (addressMap == get_task_map(_task)) && (1 == _rangesCount)) {
-
- IOOptionBits type = _flags & kIOMemoryTypeMask;
- user_addr_t range0Addr;
- IOByteCount range0Len;
-
- getAddrLenForInd(range0Addr, range0Len, type, _ranges, 0);
- if (logical == range0Addr && length <= range0Len)
+ if( _task && (addressMap == getMapForTask(_task, _ranges.v[0].address)) && (1 == _rangesCount)
+ && (logical == _ranges.v[0].address)
+ && (length <= _ranges.v[0].length) )
return( kIOReturnSuccess );
- }
return( super::doUnmap( addressMap, logical, length ));
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-OSDefineMetaClassAndAbstractStructors( IOMemoryMap, OSObject )
-
-/* inline function implementation */
-IOPhysicalAddress IOMemoryMap::getPhysicalAddress()
- { return( getPhysicalSegment( 0, 0 )); }
-
+extern "C" {
+// osfmk/device/iokit_rpc.c
+extern kern_return_t IOMapPages( vm_map_t map, vm_offset_t va, vm_offset_t pa,
+ vm_size_t length, unsigned int mapFlags);
+};
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+static IORecursiveLock * gIOMemoryLock;
+
+#define LOCK IORecursiveLockLock( gIOMemoryLock)
+#define UNLOCK IORecursiveLockUnlock( gIOMemoryLock)
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+OSDefineMetaClass( IOMemoryMap, OSObject )
+OSDefineAbstractStructors( IOMemoryMap, OSObject )
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+class _IOMemoryMap : public IOMemoryMap
+{
+ OSDeclareDefaultStructors(_IOMemoryMap)
+
+ IOMemoryDescriptor * memory;
+ IOMemoryMap * superMap;
+ IOByteCount offset;
+ IOByteCount length;
+ IOVirtualAddress logical;
+ task_t addressTask;
+ vm_map_t addressMap;
+ IOOptionBits options;
+
+public:
+ virtual void free();
+
+ // IOMemoryMap methods
+ virtual IOVirtualAddress getVirtualAddress();
+ virtual IOByteCount getLength();
+ virtual task_t getAddressTask();
+ virtual IOMemoryDescriptor * getMemoryDescriptor();
+ virtual IOOptionBits getMapOptions();
+
+ virtual IOReturn unmap();
+ virtual void taskDied();
+
+ virtual IOPhysicalAddress getPhysicalSegment(IOByteCount offset,
+ IOByteCount * length);
+
+ // for IOMemoryDescriptor use
+ _IOMemoryMap * isCompatible(
+ IOMemoryDescriptor * owner,
+ task_t intoTask,
+ IOVirtualAddress toAddress,
+ IOOptionBits options,
+ IOByteCount offset,
+ IOByteCount length );
+
+ bool init(
+ IOMemoryDescriptor * memory,
+ IOMemoryMap * superMap,
+ IOByteCount offset,
+ IOByteCount length );
+
+ bool init(
+ IOMemoryDescriptor * memory,
+ task_t intoTask,
+ IOVirtualAddress toAddress,
+ IOOptionBits options,
+ IOByteCount offset,
+ IOByteCount length );
+};
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#undef super
#define super IOMemoryMap
@@ -1891,7 +1133,7 @@
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-bool _IOMemoryMap::initCompatible(
+bool _IOMemoryMap::init(
IOMemoryDescriptor * _memory,
IOMemoryMap * _superMap,
IOByteCount _offset,
@@ -1921,7 +1163,7 @@
return( true );
}
-bool _IOMemoryMap::initWithDescriptor(
+bool _IOMemoryMap::init(
IOMemoryDescriptor * _memory,
task_t intoTask,
IOVirtualAddress toAddress,
@@ -1929,29 +1171,21 @@
IOByteCount _offset,
IOByteCount _length )
{
- bool ok;
- bool redir = ((kIOMapUnique|kIOMapReference) == ((kIOMapUnique|kIOMapReference) & _options));
-
- if ((!_memory) || (!intoTask))
+ bool ok;
+
+ if( (!_memory) || (!intoTask) || !super::init())
return( false);
if( (_offset + _length) > _memory->getLength())
return( false);
- if (!redir)
- {
- if (!super::init())
- return(false);
- addressMap = get_task_map(intoTask);
- if( !addressMap)
- return( false);
- vm_map_reference(addressMap);
- addressTask = intoTask;
- logical = toAddress;
- options = _options;
- }
+ addressMap = get_task_map(intoTask);
+ if( !addressMap)
+ return( false);
+ kernel_vm_map_reference(addressMap);
_memory->retain();
+ memory = _memory;
offset = _offset;
if( _length)
@@ -1959,377 +1193,116 @@
else
length = _memory->getLength();
+ addressTask = intoTask;
+ logical = toAddress;
+ options = _options;
+
if( options & kIOMapStatic)
ok = true;
else
- ok = (kIOReturnSuccess == _memory->doMap( addressMap, &toAddress,
- _options, offset, length ));
- if (ok || redir)
- {
- if (memory)
- memory->release();
- memory = _memory;
- logical = toAddress;
- }
- else
- {
+ ok = (kIOReturnSuccess == memory->doMap( addressMap, &logical,
+ options, offset, length ));
+ if( !ok) {
+ logical = 0;
_memory->release();
- if (!redir)
- {
- logical = 0;
- memory = 0;
- vm_map_deallocate(addressMap);
- addressMap = 0;
- }
- }
-
+ vm_map_deallocate(addressMap);
+ addressMap = 0;
+ }
return( ok );
}
-
-/* LP64todo - these need to expand */
-struct IOMemoryDescriptorMapAllocRef
-{
- ipc_port_t sharedMem;
- vm_size_t size;
- vm_offset_t mapped;
- IOByteCount sourceOffset;
- IOOptionBits options;
-};
-
-static kern_return_t IOMemoryDescriptorMapAlloc(vm_map_t map, void * _ref)
-{
- IOMemoryDescriptorMapAllocRef * ref = (IOMemoryDescriptorMapAllocRef *)_ref;
- IOReturn err;
-
- do {
- if( ref->sharedMem) {
- vm_prot_t prot = VM_PROT_READ
- | ((ref->options & kIOMapReadOnly) ? 0 : VM_PROT_WRITE);
-
- // set memory entry cache
- vm_prot_t memEntryCacheMode = prot | MAP_MEM_ONLY;
- switch (ref->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;
- }
-
- vm_size_t unused = 0;
-
- err = mach_make_memory_entry( NULL /*unused*/, &unused, 0 /*unused*/,
- memEntryCacheMode, NULL, ref->sharedMem );
- if (KERN_SUCCESS != err)
- IOLog("MAP_MEM_ONLY failed %d\n", err);
-
- err = vm_map( map,
- &ref->mapped,
- ref->size, 0 /* mask */,
- (( ref->options & kIOMapAnywhere ) ? VM_FLAGS_ANYWHERE : VM_FLAGS_FIXED)
- | VM_MAKE_TAG(VM_MEMORY_IOKIT),
- ref->sharedMem, ref->sourceOffset,
- false, // copy
- prot, // cur
- prot, // max
- VM_INHERIT_NONE);
-
- if( KERN_SUCCESS != err) {
- ref->mapped = 0;
- continue;
- }
-
- } else {
-
- err = vm_allocate( map, &ref->mapped, ref->size,
- ((ref->options & kIOMapAnywhere) ? VM_FLAGS_ANYWHERE : VM_FLAGS_FIXED)
- | VM_MAKE_TAG(VM_MEMORY_IOKIT) );
-
- if( KERN_SUCCESS != err) {
- ref->mapped = 0;
- continue;
- }
-
- // we have to make sure that these guys don't get copied if we fork.
- err = vm_inherit( map, ref->mapped, ref->size, VM_INHERIT_NONE);
- assert( KERN_SUCCESS == err );
- }
-
- } while( false );
-
- return( err );
-}
-
IOReturn IOMemoryDescriptor::doMap(
vm_map_t addressMap,
IOVirtualAddress * atAddress,
IOOptionBits options,
- IOByteCount sourceOffset,
- IOByteCount length )
+ IOByteCount sourceOffset = 0,
+ IOByteCount length = 0 )
{
IOReturn err = kIOReturnSuccess;
- memory_object_t pager;
+ vm_size_t ourSize;
+ vm_size_t bytes;
+ vm_offset_t mapped;
vm_address_t logical;
IOByteCount pageOffset;
- IOPhysicalAddress sourceAddr;
- IOMemoryDescriptorMapAllocRef ref;
-
- ref.sharedMem = (ipc_port_t) _memEntry;
- ref.sourceOffset = sourceOffset;
- ref.options = options;
-
- do {
-
- if( 0 == length)
- length = getLength();
-
- sourceAddr = getSourceSegment( sourceOffset, NULL );
- pageOffset = sourceAddr - trunc_page_32( sourceAddr );
-
- ref.size = round_page_32( length + pageOffset );
-
- if ((kIOMapReference|kIOMapUnique) == ((kIOMapReference|kIOMapUnique) & options))
- {
- upl_t redirUPL2;
- vm_size_t size;
- int flags;
-
- _IOMemoryMap * mapping = (_IOMemoryMap *) *atAddress;
- ref.mapped = mapping->getVirtualAddress();
-
- if (!_memEntry)
- {
- err = kIOReturnNotReadable;
- continue;
- }
-
- size = length;
- flags = UPL_COPYOUT_FROM | UPL_SET_INTERNAL
- | UPL_SET_LITE | UPL_SET_IO_WIRE | UPL_BLOCK_ACCESS;
-
- if (KERN_SUCCESS != memory_object_iopl_request((ipc_port_t) _memEntry, 0, &size, &redirUPL2,
- NULL, NULL,
- &flags))
- redirUPL2 = NULL;
-
- err = upl_transpose(redirUPL2, mapping->redirUPL);
- if (kIOReturnSuccess != err)
- {
- IOLog("upl_transpose(%x)\n", err);
- err = kIOReturnSuccess;
- }
-
- if (redirUPL2)
- {
- upl_commit(redirUPL2, NULL, 0);
- upl_deallocate(redirUPL2);
- redirUPL2 = 0;
- }
- {
- // swap the memEntries since they now refer to different vm_objects
- void * me = _memEntry;
- _memEntry = mapping->memory->_memEntry;
- mapping->memory->_memEntry = me;
- }
- }
- else
- {
-
- logical = *atAddress;
- if( options & kIOMapAnywhere)
- // vm_map looks for addresses above here, even when VM_FLAGS_ANYWHERE
- ref.mapped = 0;
- else {
- ref.mapped = trunc_page_32( logical );
- if( (logical - ref.mapped) != pageOffset) {
- err = kIOReturnVMError;
- continue;
- }
- }
-
- if( ref.sharedMem && (addressMap == kernel_map) && (kIOMemoryBufferPageable & _flags))
- err = IOIteratePageableMaps( ref.size, &IOMemoryDescriptorMapAlloc, &ref );
- else
- err = IOMemoryDescriptorMapAlloc( addressMap, &ref );
- }
-
- if( err != KERN_SUCCESS)
- continue;
-
- if( reserved)
- pager = (memory_object_t) reserved->devicePager;
- else
- pager = MACH_PORT_NULL;
-
- if( !ref.sharedMem || pager )
- err = handleFault( pager, addressMap, ref.mapped, sourceOffset, length, options );
-
- } while( false );
-
+ IOPhysicalLength segLen;
+ IOPhysicalAddress physAddr;
+
+ if( 0 == length)
+ length = getLength();
+
+ physAddr = getPhysicalSegment( sourceOffset, &segLen );
+ assert( physAddr );
+
+ pageOffset = physAddr - trunc_page( physAddr );
+ ourSize = length + pageOffset;
+ physAddr -= pageOffset;
+
+ logical = *atAddress;
+ if( 0 == (options & kIOMapAnywhere)) {
+ mapped = trunc_page( logical );
+ if( (logical - mapped) != pageOffset)
+ err = kIOReturnVMError;
+ }
+ if( kIOReturnSuccess == err)
+ err = vm_allocate( addressMap, &mapped, ourSize,
+ ((options & kIOMapAnywhere) ? VM_FLAGS_ANYWHERE : VM_FLAGS_FIXED)
+ | VM_MAKE_TAG(VM_MEMORY_IOKIT) );
+
+ if( err) {
+#ifdef DEBUG
+ kprintf("IOMemoryDescriptor::doMap: vm_allocate() "
+ "returned %08x\n", err);
+#endif
+ return( err);
+ }
+
+ // we have to make sure that these guys don't get copied if we fork.
+ err = vm_inherit( addressMap, mapped, ourSize, VM_INHERIT_NONE);
if( err != KERN_SUCCESS) {
- if( ref.mapped)
- doUnmap( addressMap, ref.mapped, ref.size );
- *atAddress = NULL;
- } else
- *atAddress = ref.mapped + pageOffset;
-
- return( err );
-}
-
-enum {
- kIOMemoryRedirected = 0x00010000
-};
-
-IOReturn IOMemoryDescriptor::handleFault(
- void * _pager,
- vm_map_t addressMap,
- IOVirtualAddress address,
- IOByteCount sourceOffset,
- IOByteCount length,
- IOOptionBits options )
-{
- IOReturn err = kIOReturnSuccess;
- memory_object_t pager = (memory_object_t) _pager;
- vm_size_t size;
- vm_size_t bytes;
- vm_size_t page;
- IOByteCount pageOffset;
- IOByteCount pagerOffset;
- IOPhysicalLength segLen;
- addr64_t physAddr;
-
- if( !addressMap) {
-
- if( kIOMemoryRedirected & _flags) {
-#ifdef DEBUG
- IOLog("sleep mem redirect %p, %lx\n", this, sourceOffset);
-#endif
- do {
- SLEEP;
- } while( kIOMemoryRedirected & _flags );
- }
-
- return( kIOReturnSuccess );
- }
-
- physAddr = getPhysicalSegment64( sourceOffset, &segLen );
- assert( physAddr );
- pageOffset = physAddr - trunc_page_64( physAddr );
- pagerOffset = sourceOffset;
-
- size = length + pageOffset;
- physAddr -= pageOffset;
+ doUnmap( addressMap, mapped, ourSize); // back out
+ return( err);
+ }
+
+ logical = mapped;
+ *atAddress = mapped + pageOffset;
segLen += pageOffset;
- bytes = size;
+ bytes = ourSize;
do {
// in the middle of the loop only map whole pages
if( segLen >= bytes)
segLen = bytes;
- else if( segLen != trunc_page_32( segLen))
+ else if( segLen != trunc_page( segLen))
err = kIOReturnVMError;
- if( physAddr != trunc_page_64( physAddr))
+ if( physAddr != trunc_page( physAddr))
err = kIOReturnBadArgument;
#ifdef DEBUG
if( kIOLogMapping & gIOKitDebug)
- IOLog("_IOMemoryMap::map(%p) %08lx->%08qx:%08lx\n",
- addressMap, address + pageOffset, physAddr + pageOffset,
+ kprintf("_IOMemoryMap::map(%x) %08x->%08x:%08x\n",
+ addressMap, mapped + pageOffset, physAddr + pageOffset,
segLen - pageOffset);
#endif
-
-
-
-
-#ifdef i386
- /* i386 doesn't support faulting on device memory yet */
- if( addressMap && (kIOReturnSuccess == err))
- err = IOMapPages( addressMap, address, (IOPhysicalAddress) physAddr, segLen, options );
- assert( KERN_SUCCESS == err );
+ if( kIOReturnSuccess == err)
+ err = IOMapPages( addressMap, mapped, physAddr, segLen, options );
if( err)
break;
-#endif
-
- if( pager) {
- if( reserved && reserved->pagerContig) {
- IOPhysicalLength allLen;
- addr64_t allPhys;
-
- allPhys = getPhysicalSegment64( 0, &allLen );
- assert( allPhys );
- err = device_pager_populate_object( pager, 0, allPhys >> PAGE_SHIFT, round_page_32(allLen) );
-
- } else {
-
- for( page = 0;
- (page < segLen) && (KERN_SUCCESS == err);
- page += page_size) {
- err = device_pager_populate_object(pager, pagerOffset,
- (ppnum_t)((physAddr + page) >> PAGE_SHIFT), page_size);
- pagerOffset += page_size;
- }
- }
- assert( KERN_SUCCESS == err );
- 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,
- (vm_map_offset_t)address,
- VM_PROT_READ|VM_PROT_WRITE,
- FALSE, THREAD_UNINT, NULL,
- (vm_map_offset_t)0);
- }
-
- /* *** Temporary Workaround *** */
- /* *** ALERT *** */
-#endif
+
sourceOffset += segLen - pageOffset;
- address += segLen;
+ mapped += segLen;
bytes -= segLen;
pageOffset = 0;
} while( bytes
- && (physAddr = getPhysicalSegment64( sourceOffset, &segLen )));
+ && (physAddr = getPhysicalSegment( sourceOffset, &segLen )));
if( bytes)
err = kIOReturnBadArgument;
+ if( err)
+ doUnmap( addressMap, logical, ourSize );
+ else
+ mapped = true;
return( err );
}
@@ -2347,97 +1320,10 @@
addressMap, logical, length );
#endif
- if( true /* && (addressMap == kernel_map) || (addressMap == get_task_map(current_task()))*/) {
-
- if( _memEntry && (addressMap == kernel_map) && (kIOMemoryBufferPageable & _flags))
- addressMap = IOPageableMapForAddress( logical );
-
+ if( (addressMap == kernel_map) || (addressMap == get_task_map(current_task())))
err = vm_deallocate( addressMap, logical, length );
-
- } else
+ else
err = kIOReturnSuccess;
-
- return( err );
-}
-
-IOReturn IOMemoryDescriptor::redirect( task_t safeTask, bool doRedirect )
-{
- IOReturn err = kIOReturnSuccess;
- _IOMemoryMap * mapping = 0;
- OSIterator * iter;
-
- LOCK;
-
- if( doRedirect)
- _flags |= kIOMemoryRedirected;
- else
- _flags &= ~kIOMemoryRedirected;
-
- do {
- if( (iter = OSCollectionIterator::withCollection( _mappings))) {
- while( (mapping = (_IOMemoryMap *) iter->getNextObject()))
- mapping->redirect( safeTask, doRedirect );
-
- iter->release();
- }
- } while( false );
-
- if (!doRedirect)
- {
- WAKEUP;
- }
-
- UNLOCK;
-
- // temporary binary compatibility
- IOSubMemoryDescriptor * subMem;
- if( (subMem = OSDynamicCast( IOSubMemoryDescriptor, this)))
- err = subMem->redirect( safeTask, doRedirect );
- else
- err = kIOReturnSuccess;
-
- return( err );
-}
-
-IOReturn IOSubMemoryDescriptor::redirect( task_t safeTask, bool doRedirect )
-{
- return( _parent->redirect( safeTask, doRedirect ));
-}
-
-IOReturn _IOMemoryMap::redirect( task_t safeTask, bool doRedirect )
-{
- IOReturn err = kIOReturnSuccess;
-
- if( superMap) {
-// err = ((_IOMemoryMap *)superMap)->redirect( safeTask, doRedirect );
- } else {
-
- LOCK;
- if( logical && addressMap
- && (!safeTask || (get_task_map(safeTask) != addressMap))
- && (0 == (options & kIOMapStatic)))
- {
- IOUnmapPages( addressMap, logical, length );
- if(!doRedirect && safeTask
- && ((memory->_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical))
- {
- err = vm_deallocate( addressMap, logical, length );
- err = memory->doMap( addressMap, &logical,
- (options & ~kIOMapAnywhere) /*| kIOMapReserve*/,
- offset, length );
- } else
- err = kIOReturnSuccess;
-#ifdef DEBUG
- IOLog("IOMemoryMap::redirect(%d, %p) %x:%lx from %p\n", doRedirect, this, logical, length, addressMap);
-#endif
- }
- UNLOCK;
- }
-
- if (((memory->_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical)
- && safeTask
- && (doRedirect != (0 != (memory->_flags & kIOMemoryRedirected))))
- memory->redirect(safeTask, doRedirect);
return( err );
}
@@ -2474,17 +1360,6 @@
}
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) const
-{
- LOCK;
- super::taggedRelease(tag, 2);
UNLOCK;
}
@@ -2499,20 +1374,8 @@
memory->release();
}
- if (owner && (owner != memory))
- {
- LOCK;
- owner->removeMapping(this);
- UNLOCK;
- }
-
if( superMap)
superMap->release();
-
- if (redirUPL) {
- upl_commit(redirUPL, NULL, 0);
- upl_deallocate(redirUPL);
- }
super::free();
}
@@ -2545,7 +1408,7 @@
return( memory );
}
-_IOMemoryMap * _IOMemoryMap::copyCompatible(
+_IOMemoryMap * _IOMemoryMap::isCompatible(
IOMemoryDescriptor * owner,
task_t task,
IOVirtualAddress toAddress,
@@ -2555,14 +1418,9 @@
{
_IOMemoryMap * mapping;
- if( (!task) || (!addressMap) || (addressMap != get_task_map(task)))
+ if( (!task) || (task != getAddressTask()))
return( 0 );
- if( options & kIOMapUnique)
- return( 0 );
- if( (options ^ _options) & kIOMapReadOnly)
- return( 0 );
- if( (kIOMapDefaultCache != (_options & kIOMapCacheMask))
- && ((options ^ _options) & kIOMapCacheMask))
+ if( (options ^ _options) & (kIOMapCacheMask | kIOMapReadOnly))
return( 0 );
if( (0 == (_options & kIOMapAnywhere)) && (logical != toAddress))
@@ -2583,7 +1441,7 @@
} else {
mapping = new _IOMemoryMap;
if( mapping
- && !mapping->initCompatible( owner, this, _offset, _length )) {
+ && !mapping->init( owner, this, _offset, _length )) {
mapping->release();
mapping = 0;
}
@@ -2593,12 +1451,12 @@
}
IOPhysicalAddress _IOMemoryMap::getPhysicalSegment( IOByteCount _offset,
- IOPhysicalLength * _length)
+ IOPhysicalLength * length)
{
IOPhysicalAddress address;
LOCK;
- address = memory->getPhysicalSegment( offset + _offset, _length );
+ address = memory->getPhysicalSegment( offset + _offset, length );
UNLOCK;
return( address );
@@ -2615,9 +1473,6 @@
{
if( 0 == gIOMemoryLock)
gIOMemoryLock = IORecursiveLockAlloc();
-
- IORegistryEntry::getRegistryRoot()->setProperty(kIOMaximumMappedIOByteCountKey,
- ptoa_64(gIOMaximumMappedIOPageCount), 64);
}
void IOMemoryDescriptor::free( void )
@@ -2631,30 +1486,30 @@
IOMemoryMap * IOMemoryDescriptor::setMapping(
task_t intoTask,
IOVirtualAddress mapAddress,
- IOOptionBits options )
-{
- _IOMemoryMap * newMap;
-
- newMap = new _IOMemoryMap;
+ IOOptionBits options = 0 )
+{
+ _IOMemoryMap * map;
+
+ map = new _IOMemoryMap;
LOCK;
- if( newMap
- && !newMap->initWithDescriptor( this, intoTask, mapAddress,
+ if( map
+ && !map->init( this, intoTask, mapAddress,
options | kIOMapStatic, 0, getLength() )) {
- newMap->release();
- newMap = 0;
- }
-
- addMapping( newMap);
+ map->release();
+ map = 0;
+ }
+
+ addMapping( map);
UNLOCK;
- return( newMap);
+ return( map);
}
IOMemoryMap * IOMemoryDescriptor::map(
- IOOptionBits options )
+ IOOptionBits options = 0 )
{
return( makeMapping( this, kernel_task, 0,
@@ -2666,76 +1521,13 @@
task_t intoTask,
IOVirtualAddress toAddress,
IOOptionBits options,
- IOByteCount offset,
- IOByteCount length )
+ IOByteCount offset = 0,
+ IOByteCount length = 0 )
{
if( 0 == length)
length = getLength();
return( makeMapping( this, intoTask, toAddress, options, offset, length ));
-}
-
-IOReturn _IOMemoryMap::redirect(IOMemoryDescriptor * newBackingMemory,
- IOOptionBits options,
- IOByteCount offset)
-{
- IOReturn err = kIOReturnSuccess;
- IOMemoryDescriptor * physMem = 0;
-
- LOCK;
-
- if (logical && addressMap) do
- {
- if ((memory->_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical)
- {
- physMem = memory;
- physMem->retain();
- }
-
- if (!redirUPL)
- {
- vm_size_t size = length;
- int flags = UPL_COPYOUT_FROM | UPL_SET_INTERNAL
- | UPL_SET_LITE | UPL_SET_IO_WIRE | UPL_BLOCK_ACCESS;
- if (KERN_SUCCESS != memory_object_iopl_request((ipc_port_t) memory->_memEntry, 0, &size, &redirUPL,
- NULL, NULL,
- &flags))
- redirUPL = 0;
-
- if (physMem)
- {
- IOUnmapPages( addressMap, logical, length );
- physMem->redirect(0, true);
- }
- }
-
- if (newBackingMemory)
- {
- if (newBackingMemory != memory)
- {
- if (this != newBackingMemory->makeMapping(newBackingMemory, addressTask, (IOVirtualAddress) this,
- options | kIOMapUnique | kIOMapReference,
- offset, length))
- err = kIOReturnError;
- }
- if (redirUPL)
- {
- upl_commit(redirUPL, NULL, 0);
- upl_deallocate(redirUPL);
- redirUPL = 0;
- }
- if (physMem)
- physMem->redirect(0, false);
- }
- }
- while (false);
-
- UNLOCK;
-
- if (physMem)
- physMem->release();
-
- return (err);
}
IOMemoryMap * IOMemoryDescriptor::makeMapping(
@@ -2746,126 +1538,49 @@
IOByteCount offset,
IOByteCount length )
{
- IOMemoryDescriptor * mapDesc = 0;
_IOMemoryMap * mapping = 0;
OSIterator * iter;
LOCK;
- do
- {
- if (kIOMapUnique & options)
- {
- IOPhysicalAddress phys;
- IOByteCount physLen;
-
- if (owner != this)
- continue;
-
- if ((_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical)
- {
- phys = getPhysicalSegment(offset, &physLen);
- if (!phys || (physLen < length))
- continue;
-
- mapDesc = IOMemoryDescriptor::withPhysicalAddress(
- phys, length, _direction);
- if (!mapDesc)
- continue;
- offset = 0;
- }
- else
- {
- mapDesc = this;
- mapDesc->retain();
- }
-
- if (kIOMapReference & options)
- {
- mapping = (_IOMemoryMap *) toAddress;
- mapping->retain();
-
-#if 1
- uint32_t pageOffset1 = mapDesc->getSourceSegment( offset, NULL );
- pageOffset1 -= trunc_page_32( pageOffset1 );
-
- uint32_t pageOffset2 = mapping->getVirtualAddress();
- pageOffset2 -= trunc_page_32( pageOffset2 );
-
- if (pageOffset1 != pageOffset2)
- IOLog("::redirect can't map offset %x to addr %x\n",
- pageOffset1, mapping->getVirtualAddress());
-#endif
-
-
- if (!mapping->initWithDescriptor( mapDesc, intoTask, toAddress, options,
- offset, length ))
- {
-#ifdef DEBUG
- IOLog("Didn't redirect map %08lx : %08lx\n", offset, length );
-#endif
- }
-
- if (mapping->owner)
- mapping->owner->removeMapping(mapping);
- continue;
- }
- }
- else
- {
- // look for an existing mapping
- if( (iter = OSCollectionIterator::withCollection( _mappings))) {
-
- while( (mapping = (_IOMemoryMap *) iter->getNextObject())) {
-
- if( (mapping = mapping->copyCompatible(
- owner, intoTask, toAddress,
- options | kIOMapReference,
- offset, length )))
- break;
- }
- iter->release();
- }
-
-
- if (mapping)
- mapping->retain();
-
- if( mapping || (options & kIOMapReference))
- continue;
-
- mapDesc = owner;
- mapDesc->retain();
- }
+ do {
+ // look for an existing mapping
+ if( (iter = OSCollectionIterator::withCollection( _mappings))) {
+
+ while( (mapping = (_IOMemoryMap *) iter->getNextObject())) {
+
+ if( (mapping = mapping->isCompatible(
+ owner, intoTask, toAddress,
+ options | kIOMapReference,
+ offset, length )))
+ break;
+ }
+ iter->release();
+ if( mapping)
+ continue;
+ }
+
+
+ if( mapping || (options & kIOMapReference))
+ continue;
+
owner = this;
mapping = new _IOMemoryMap;
if( mapping
- && !mapping->initWithDescriptor( mapDesc, intoTask, toAddress, options,
+ && !mapping->init( owner, intoTask, toAddress, options,
offset, length )) {
-#ifdef DEBUG
+
IOLog("Didn't make map %08lx : %08lx\n", offset, length );
-#endif
mapping->release();
mapping = 0;
}
- if (mapping)
- mapping->retain();
-
} while( false );
- if (mapping)
- {
- mapping->owner = owner;
- owner->addMapping( mapping);
- mapping->release();
- }
+ owner->addMapping( mapping);
UNLOCK;
-
- if (mapDesc)
- mapDesc->release();
return( mapping);
}
@@ -2876,16 +1591,19 @@
if( mapping) {
if( 0 == _mappings)
_mappings = OSSet::withCapacity(1);
- if( _mappings )
- _mappings->setObject( mapping );
+ if( _mappings && _mappings->setObject( mapping ))
+ mapping->release(); /* really */
}
}
void IOMemoryDescriptor::removeMapping(
IOMemoryMap * mapping )
{
- if( _mappings)
+ if( _mappings) {
+ mapping->retain();
+ mapping->retain();
_mappings->removeObject( mapping);
+ }
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
@@ -2899,38 +1617,22 @@
bool IOSubMemoryDescriptor::initSubRange( IOMemoryDescriptor * parent,
IOByteCount offset, IOByteCount length,
- IODirection direction )
-{
+ IODirection withDirection )
+{
+ if( !super::init())
+ return( false );
+
if( !parent)
return( false);
if( (offset + length) > parent->getLength())
return( false);
-
- /*
- * We can check the _parent instance variable before having ever set it
- * to an initial value because I/O Kit guarantees that all our instance
- * variables are zeroed on an object's allocation.
- */
-
- if( !_parent) {
- if( !super::init())
- return( false );
- } else {
- /*
- * An existing memory descriptor is being retargeted to
- * point to somewhere else. Clean up our present state.
- */
-
- _parent->release();
- _parent = 0;
- }
parent->retain();
_parent = parent;
_start = offset;
_length = length;
- _direction = direction;
+ _direction = withDirection;
_tag = parent->getTag();
return( true );
@@ -2967,49 +1669,32 @@
return( address );
}
-
-IOReturn IOSubMemoryDescriptor::doMap(
- vm_map_t addressMap,
- IOVirtualAddress * atAddress,
- IOOptionBits options,
- IOByteCount sourceOffset,
- IOByteCount length )
-{
- if( sourceOffset >= _length)
- return( kIOReturnOverrun );
- return (_parent->doMap(addressMap, atAddress, options, sourceOffset + _start, length));
-}
-
-IOPhysicalAddress IOSubMemoryDescriptor::getSourceSegment( IOByteCount offset,
- IOByteCount * length )
-{
- IOPhysicalAddress address;
- IOByteCount actualLength;
+void * IOSubMemoryDescriptor::getVirtualSegment(IOByteCount offset,
+ IOByteCount * lengthOfSegment)
+{
+ return( 0 );
+}
+
+IOByteCount IOSubMemoryDescriptor::readBytes(IOByteCount offset,
+ void * bytes, IOByteCount withLength)
+{
+ IOByteCount byteCount;
assert(offset <= _length);
-
- if( length)
- *length = 0;
if( offset >= _length)
return( 0 );
- address = _parent->getSourceSegment( offset + _start, &actualLength );
-
- if( address && length)
- *length = min( _length - offset, actualLength );
-
- return( address );
-}
-
-void * IOSubMemoryDescriptor::getVirtualSegment(IOByteCount offset,
- IOByteCount * lengthOfSegment)
-{
- return( 0 );
-}
-
-IOByteCount IOSubMemoryDescriptor::readBytes(IOByteCount offset,
- void * bytes, IOByteCount length)
+ LOCK;
+ byteCount = _parent->readBytes( _start + offset, bytes,
+ min(withLength, _length - offset) );
+ UNLOCK;
+
+ return( byteCount );
+}
+
+IOByteCount IOSubMemoryDescriptor::writeBytes(IOByteCount offset,
+ const void* bytes, IOByteCount withLength)
{
IOByteCount byteCount;
@@ -3019,63 +1704,15 @@
return( 0 );
LOCK;
- byteCount = _parent->readBytes( _start + offset, bytes,
- min(length, _length - offset) );
+ byteCount = _parent->writeBytes( _start + offset, bytes,
+ min(withLength, _length - offset) );
UNLOCK;
return( byteCount );
}
-IOByteCount IOSubMemoryDescriptor::writeBytes(IOByteCount offset,
- const void* bytes, IOByteCount length)
-{
- IOByteCount byteCount;
-
- assert(offset <= _length);
-
- if( offset >= _length)
- return( 0 );
-
- LOCK;
- byteCount = _parent->writeBytes( _start + offset, bytes,
- min(length, _length - offset) );
- UNLOCK;
-
- return( byteCount );
-}
-
-IOReturn IOSubMemoryDescriptor::setPurgeable( IOOptionBits newState,
- IOOptionBits * oldState )
-{
- IOReturn err;
-
- LOCK;
- err = _parent->setPurgeable( newState, oldState );
- UNLOCK;
-
- return( err );
-}
-
-IOReturn IOSubMemoryDescriptor::performOperation( IOOptionBits options,
- IOByteCount offset, IOByteCount length )
-{
- IOReturn err;
-
- assert(offset <= _length);
-
- if( offset >= _length)
- return( kIOReturnOverrun );
-
- LOCK;
- err = _parent->performOperation( options, _start + offset,
- min(length, _length - offset) );
- UNLOCK;
-
- return( err );
-}
-
IOReturn IOSubMemoryDescriptor::prepare(
- IODirection forDirection)
+ IODirection forDirection = kIODirectionNone)
{
IOReturn err;
@@ -3087,7 +1724,7 @@
}
IOReturn IOSubMemoryDescriptor::complete(
- IODirection forDirection)
+ IODirection forDirection = kIODirectionNone)
{
IOReturn err;
@@ -3106,22 +1743,15 @@
IOByteCount offset,
IOByteCount length )
{
- IOMemoryMap * mapping = 0;
-
- if (!(kIOMapUnique & options))
- mapping = (IOMemoryMap *) _parent->makeMapping(
+ IOMemoryMap * mapping;
+
+ mapping = (IOMemoryMap *) _parent->makeMapping(
_parent, intoTask,
toAddress - (_start + offset),
options | kIOMapReference,
_start + offset, length );
if( !mapping)
- mapping = (IOMemoryMap *) _parent->makeMapping(
- _parent, intoTask,
- toAddress,
- options, _start + offset, length );
-
- if( !mapping)
mapping = super::makeMapping( owner, intoTask, toAddress, options,
offset, length );
@@ -3132,17 +1762,17 @@
bool
IOSubMemoryDescriptor::initWithAddress(void * address,
- IOByteCount length,
- IODirection direction)
+ IOByteCount withLength,
+ IODirection withDirection)
{
return( false );
}
bool
IOSubMemoryDescriptor::initWithAddress(vm_address_t address,
- IOByteCount length,
- IODirection direction,
- task_t task)
+ IOByteCount withLength,
+ IODirection withDirection,
+ task_t withTask)
{
return( false );
}
@@ -3150,8 +1780,8 @@
bool
IOSubMemoryDescriptor::initWithPhysicalAddress(
IOPhysicalAddress address,
- IOByteCount length,
- IODirection direction )
+ IOByteCount withLength,
+ IODirection withDirection )
{
return( false );
}
@@ -3160,9 +1790,9 @@
IOSubMemoryDescriptor::initWithRanges(
IOVirtualRange * ranges,
UInt32 withCount,
- IODirection direction,
- task_t task,
- bool asReference)
+ IODirection withDirection,
+ task_t withTask,
+ bool asReference = false)
{
return( false );
}
@@ -3170,164 +1800,19 @@
bool
IOSubMemoryDescriptor::initWithPhysicalRanges( IOPhysicalRange * ranges,
UInt32 withCount,
- IODirection direction,
- bool asReference)
+ IODirection withDirection,
+ bool asReference = false)
{
return( false );
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-bool IOGeneralMemoryDescriptor::serialize(OSSerialize * s) const
-{
- OSSymbol const *keys[2];
- OSObject *values[2];
- struct SerData {
- user_addr_t address;
- user_size_t length;
- } *vcopy;
- unsigned int index, nRanges;
- bool result;
-
- IOOptionBits type = _flags & kIOMemoryTypeMask;
-
- 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 = (SerData *) IOMalloc(sizeof(SerData) * 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) {
- Ranges vec = _ranges;
- for (index = 0; index < nRanges; index++) {
- user_addr_t addr; IOByteCount len;
- getAddrLenForInd(addr, len, type, vec, index);
- vcopy[index].address = addr;
- vcopy[index].length = len;
- }
- } else {
- // The descriptor changed out from under us. Give up.
- UNLOCK;
- result = false;
- goto bail;
- }
- UNLOCK;
-
- for (index = 0; index < nRanges; index++)
- {
- user_addr_t addr = vcopy[index].address;
- IOByteCount len = (IOByteCount) vcopy[index].length;
- values[0] =
- OSNumber::withNumber(addr, (((UInt64) addr) >> 32)? 64 : 32);
- if (values[0] == 0) {
- result = false;
- goto bail;
- }
- values[1] = OSNumber::withNumber(len, sizeof(len) * 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");
-}
-
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-
-OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 0);
-OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 1);
-OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 2);
-OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 3);
-OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 4);
+OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 0);
+OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 1);
+OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 2);
+OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 3);
+OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 4);
OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 5);
OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 6);
OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 7);
@@ -3339,7 +1824,3 @@
OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 13);
OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 14);
OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 15);
-
-/* ex-inline function implementation */
-IOPhysicalAddress IOMemoryDescriptor::getPhysicalAddress()
- { return( getPhysicalSegment( 0, 0 )); }