Altera RapidIO II MegaCore Function - Manual (Page 147)

Chapter 6: Software Interface 6–9
Physical Layer Registers
August 2014 Altera Corporation RapidIO II MegaCore Function
User Guide
DISCOVER [29] RW
This device has been located by the processing element responsible for system
configuration.
1'b0 - The device has not been previously discovered
1'b1 - The device has been discovered by another processing element
This field is for software use only. Its value has no effect on hardware.
(1)
RSRV [28:0] RO Reserved 29'b0
Note to Table 6–9 :
(1) The reset value of this field is set in the RapidIO II parameter editor.
Table 6–9. Port General Control—Offset: 0x13C (Part 2 of 2)
Field Bits Access Function Default
Table 6–10. Port 0 Link Maintenance Request CSR—Offset: 0x140
Field Bits Access Function Default
RSRV [31:3] RO Reserved 29'b0
COMMAND [2:0] RW
Command to be sent in a link-request control symbol. When a
valid value is written to this field, the RapidIO II IP core generates a
link-request
control symbol with the specified command. The IP
core does not generate a link-request control symbol when an
invalid value is written.
The following values are valid:
3’b011: reset-device
3’b100: input-status
3'b000
Table 6–11. Port 0 Link Maintenance Response CSR—Offset: 0x144
Field Bits Access Function Default
RESPONSE_VALID [31] RO,RC
Value is the status of the most recent link-request control symbol
this RapidIO II IP core sent on the RapidIO link. If the link-request
control symbol is a link-request input-status control symbol,
this bit, if set, indicates that the link-response control symbol has
been received and the status fields in this register are valid. If the
link-request
control symbol is a link-request reset-device
control symbol, this bit, if set, indicates that the link-request was
transmitted.
This bit automatically clears in response to a read operation.
1’b0
RSRV [30:11] RO Reserved 20’b0
ACKID_STATUS [10:5] RO
Value of the ackID_status field in the link-response control
symbol. This field holds the value of the next expected ackID. Refer to
Table 3-3 in the RapidIO Interconnect Specification v2.2 Part 6:
LP-Serial Physical Layer Specification.
6'b0
PORT_STATUS [4:0] RO
Value of the port-status field in the link-response control
symbol. Refer to Table 3-6 in the RapidIO Interconnect Specification
v2.2 Part 6: LP-Serial Physical Layer Specification.
5'b0