Broadcom BCM5722 - Only; Table 276: Standard Receive BD Producer Ring Replenish Threshold Register (Offset 0 X2 C18)-BCM5722, BCM5755, BCM5755 M, BCM5756 M, BCM5757, BCM5754, BCM5787 Only; Table 277: Standard Receive BD Producer Ring Replenish Threshold Register (Offset 0 X2 C18)-BCM5906

Programmer’s Guide BCM5722
10/15/07
Broadcom Corporation
Document 5722-PG101-R Receive BD Initiator Control Registers Page 290
RECEIVE BD INITIATOR LOCAL NIC RECEIVE BD PRODUCER INDEX REGISTER (OFFSET
0X2C0C–0X2C0F)
This register is used to keep track of the current DMAs queued to move receive BDs from the host to the NIC.
STANDARD RECEIVE BD PRODUCER RING REPLENISH THRESHOLD REGISTER (OFFSET
0
X2C18–0X2C1B)—BCM5722, BCM5755, BCM5755M, BCM5756M, BCM5757,
BCM5754, BCM5787 O
NLY
The value programmed in this register indicates the number of buffer descriptors that must be indicated before a DMA is
initiated.
STANDARD RECEIVE BD PRODUCER RING REPLENISH THRESHOLD REGISTER (OFFSET
0
X2C18–0X2C1B)—BCM5906 ONLY
The value programmed in this register indicates the number of buffer descriptors that must be indicated before a DMA is
initiated.
Table 276: Standard Receive BD Producer Ring Replenish Threshold Register (Offset 0x2C18)—BCM5722,
BCM5755, BCM5755M, BCM5756M, BCM5757, BCM5754, BCM5787 Only
Bit Field Description Init Access
31:0 BD Num Number of buffer descriptors indicated by the receive
producer index for the DMA engine to initiate a transfer of
buffer descriptors for replenishing the ring.
00000000h R/W
Table 277: Standard Receive BD Producer Ring Replenish Threshold Register (Offset 0x2C18)—BCM5906 Only
Bit Field Description Init Access
31:10 Reserved – 0 RO
9:0 BD Num Number of buffer descriptors indicated by the receive producer
index for the DMA engine to initiate a transfer of buffer
descriptors for replenishing the ring.
000h R/W