
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
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