dmagrp_receive_descriptor_list_address 

         <b>Register 3 (Receive Descriptor List Address Register) </b>

The Receive Descriptor List Address register points to the start of the Receive Descriptor List. The descriptor lists reside in the host's physical memory space and must be Word, Dword, or Lword-aligned (for 32-bit, 64-bit, or 128-bit data bus). The DMA internally converts it to bus width aligned address by making the corresponding LS bits low. Writing to this register is permitted only when reception is stopped. When stopped, this register must be written to before the receive Start command is given.

You can write to this register only when Rx DMA has stopped, that is, Bit 1 (SR) is set to zero in Register 6 (Operation Mode Register). When stopped, this register can be written with a new descriptor list address. When you set the SR bit to 1, the DMA takes the newly programmed descriptor base address.

If this register is not changed when the SR bit is set to 0, then the DMA takes the descriptor address where it was stopped earlier.
Module Instance Base Address Register Address
i_emac_emac0 0xFF800000 0xFF80100C
i_emac_emac1 0xFF802000 0xFF80300C
i_emac_emac2 0xFF804000 0xFF80500C

Size: 32

Offset: 0x100C

Access: RW

Important: The value of a reserved bit must be maintained in software. When you modify registers containing reserved bit fields, you must use a read-modify-write operation to preserve state and prevent indeterminate system behavior.
Bit Fields
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

rdesla_32bit

RW 0x0

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

rdesla_32bit

RW 0x0

Reserved

dmagrp_receive_descriptor_list_address Fields

Bit Name Description Access Reset
31:2 rdesla_32bit 
This field contains the base address of the first descriptor in the Receive Descriptor list. The LSB bits (1:0) are ignored (32-bit wide bus) and internally taken as all-zero by the DMA. Therefore, these LSB bits are read-only (RO).
 RW 0x0