ARM Technical Support Knowledge Articles

Changing PL330 AXI transaction IDs

Applies to: PL330 AXI DMA Controller

Scenario

According to PL330 TRM page 2-7, AXI identification tags of transactions that are issued by PL330 are defined as follows:
  - DMA channel thread access
     -> the same number as DMA channel
  - DMA manager thread
     -> the same number as the number of DMA channels that DMAC provides

Is it possible for user to change these identification tags as they like?

Answer

Unfortunately, no. These values are fixed by the rtl and are not
available as a user-configurable option. Both the Channel and Manager
threads rely on the IDs being known values - ID = Channel number for the
Channel thread and ID = Total number of channels for the Manager thread.

Rate this article

[Bad]
|
|
[Good]
Disagree? Move your mouse over the bar and click

Did you find this article helpful? Yes No

How can we improve this article?

Link to this article
Copyright © 2011 ARM Limited. All rights reserved. External (Open), Non-Confidential