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5.49QueueTransmitDMAHeadDescriptorPointerRegisters(QUEUEn_TXDMA_HDP)
SRIORegisters
Therearesixteenoftheseregisters.
Figure105.QueueTransmitDMAHeadDescriptorPointerRegisters(QUEUEn_TXDMA_HDP)
31-16
TX_HDP
RW-0x00
LEGEND:R=Readonly;-n=valueafterreset
15-0
TX_HDP
RW-0x00
LEGEND:R=Readonly;-n=valueafterreset
Table79.QueueTransmitDMAHeadDescriptorPointerRegisters(QUEUEn_TXDMA_HDP)Field
Descriptions
BitFieldValueDescription
31-0TX_HDPThisfieldisthehostmemoryaddressforthefirstbufferdescriptorinthetransmitqueue.Thisfield
iswrittenbythehosttoinitiatequeuetransmitoperationsandiszeroedbytheportwhenall
packetsinthequeuehavebeentransmitted.Anerrorconditionresultsifthehostwritesthisfield
whenthecurrentfieldvalueisnonzero.Theaddressmustbe32-bitwordaligned.
SerialRapidIO(SRIO) 150SPRU976–March2006
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