Non-I/O CSR space

Non-I/O CSRs reside within the PA-8200, EPAC, EMAC, and EPIC.

Figure 2-11 Non-I/O CSR space format

The bits and fields of the CSR space address are as follows:

Local EPAC access bit (bit 14)—Indicates that the access is to the local EPAC space within the associated EPAC ASIC.
DXbr field (bits 18:19)—Specifies which of the eight Hyperplane crossbar ports the request is to be routed.
Chip field (bits 21:23)—Routes the packet to the appropriate chip at a Hyperplane crossbar port.
Page field (bits 28:36)—Separates groups of CSRs into similar usage spaces.
Register field (bits 28:36)—Specifies the register number.

Technical documentation