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5.51QueueReceiveDMAHeadDescriptorPointerRegisters(QUEUEn_RXDMA_HDP)
SRIORegisters
Therearesixteenoftheseregisters.
Figure107.QueueReceiveDMAHeadDescriptorPointerRegisters(QUEUEn_RXDMA_HDP)
31-16
RX_HDP
RW-0x00
LEGEND:R=Readonly;-n=valueafterreset
15-0
RX_HDP
RW-0x00
LEGEND:R=Readonly;-n=valueafterreset
Table81.QueueReceiveDMAHeadDescriptorPointerRegisters(QUEUEn_RXDMA_HDP)Field
Descriptions
BitFieldValueDescription
31-0RX_HDPRxQueueHeadDescriptorPointer:Thisfieldisthehostmemoryaddressforthefirstbuffer
descriptorinthechannelreceivequeue.Thisfieldiswrittenbythehosttoinitiatequeuereceive
operationsandiszeroedbytheportwhenallfreebuffershavebeenused.Anerrorcondition
resultsifthehostwritesthisfieldwhenthecurrentfieldvalueisnonzero.Theaddressmustbe
32-bitwordaligned.
SerialRapidIO(SRIO) 152SPRU976–March2006
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