Texas Instruments TMS320TCI648x - Manual (Page 164)

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5.41 Queue n Transmit DMA Head Descriptor Pointer Register (QUEUEn_TXDMA_HDP)
SRIO Registers
There are sixteen of these registers (see Table 104 ). QUEUEn_TXDMA_HDP is shown in Figure 103 and
described in Table 105 . For additional programming information, see Section 2.3.4.2 .
Table 104. QUEUEn_TXDMA_HDP Registers
Register Address Offset
QUEUE0_TXDMA_HDP 0500h
QUEUE1_TXDMA_HDP 0504h
QUEUE2_TXDMA_HDP 0508h
QUEUE3_TXDMA_HDP 050Ch
QUEUE4_TXDMA_HDP 0510h
QUEUE5_TXDMA_HDP 0514h
QUEUE6_TXDMA_HDP 0518h
QUEUE7_TXDMA_HDP 051Ch
QUEUE8_TXDMA_HDP 0520h
QUEUE9_TXDMA_HDP 0524h
QUEUE10_TXDMA_HDP 0528h
QUEUE11_TXDMA_HDP 052Ch
QUEUE12_TXDMA_HDP 0530h
QUEUE13_TXDMA_HDP 0534h
QUEUE14_TXDMA_HDP 0538h
QUEUE15_TXDMA_HDP 053Ch
Figure 103. Queue n Transmit DMA Head Descriptor Pointer Register (QUEUEn_TXDMA_HDP)
31 0
TX_HDP
R/W-00000000h
LEGEND: R/W = Read/Write; -n = Value after reset
Table 105. Queue n Transmit DMA Head Descriptor Pointer Register (QUEUEn_TXDMA_HDP) Field
Descriptions
Bit Field Value Description
31–0 TX_HDP 00000000h This field is the memory address for the first buffer descriptor in the transmit
to queue. This field is written by the DSP core to initiate queue transmit operations
FFFFFFFCh and is zeroed by the port when all packets in the queue have been transmitted.
An error condition results if the DSP core writes this field when the current field
value is nonzero. The address must be 32-bit word aligned (the 2 LSBs must be
0s).
Serial RapidIO (SRIO) 164 SPRUE13A – September 2006
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