AppleEHCIsitdMemoryBlock.cpp [plain text]
#include <IOKit/usb/IOUSBLog.h>
#include "AppleEHCIsitdMemoryBlock.h"
#define super IOBufferMemoryDescriptor
OSDefineMetaClassAndStructors(AppleEHCIsitdMemoryBlock, IOBufferMemoryDescriptor);
AppleEHCIsitdMemoryBlock*
AppleEHCIsitdMemoryBlock::NewMemoryBlock(void)
{
AppleEHCIsitdMemoryBlock *me = new AppleEHCIsitdMemoryBlock;
IOByteCount len;
if (!me)
USBError(1, "AppleEHCIsitdMemoryBlock::NewMemoryBlock, constructor failed!");
if (me && !me->initWithOptions(kIOMemorySharingTypeMask, kEHCIPageSize, kEHCIPageSize))
{
USBError(1, "AppleEHCIsitdMemoryBlock::NewMemoryBlock, initWithOptions failed!");
me->release();
return NULL;
}
me->prepare();
me->_sharedLogical = (EHCISplitIsochTransferDescriptorSharedPtr)me->getBytesNoCopy();
me->_sharedPhysical = me->getPhysicalSegment(0, &len);
return me;
}
UInt32
AppleEHCIsitdMemoryBlock::NumTDs(void)
{
return SITDsPerBlock;
}
IOPhysicalAddress
AppleEHCIsitdMemoryBlock::GetPhysicalPtr(UInt32 index)
{
IOPhysicalAddress ret = NULL;
if (index < SITDsPerBlock)
ret = _sharedPhysical + (index * sizeof(EHCISplitIsochTransferDescriptorShared));
return ret;
}
EHCISplitIsochTransferDescriptorSharedPtr
AppleEHCIsitdMemoryBlock::GetLogicalPtr(UInt32 index)
{
EHCISplitIsochTransferDescriptorSharedPtr ret = NULL;
if (index < SITDsPerBlock)
ret = &_sharedLogical[index];
return ret;
}
AppleEHCIsitdMemoryBlock*
AppleEHCIsitdMemoryBlock::GetNextBlock(void)
{
return _nextBlock;
}
void
AppleEHCIsitdMemoryBlock::SetNextBlock(AppleEHCIsitdMemoryBlock* next)
{
_nextBlock = next;
}