Altera RapidIO MegaCore Function - Manual (Page 139)

Chapter 6: Software Interface 6–7
Physical Layer Registers
August 2014 Altera Corporation RapidIO MegaCore Function
User Guide
Table 6–9. Port 0 Local AckID CSR—Offset: 0x148
Field Bits Access Function Default
RSRV [31:29] RO Reserved 3'b0
INBOUND_ACKID [28:24] RO Next expected packet ackID. 5’b0
RSRV [23:13] RO Reserved 11’b0
OUTSTANDING_
ACKID
[12:8] RO Next expected acknowledge control-symbol ackID. 5'b0
RSRV [7:5] RO Reserved 3'b0
OUTBOUND_ACKID [4:0] RO Next transmitted packet ackID. 5'b0
Table 6–10. Port 0 Error and Status CSR—Offset: 0x158 (1) (Part 1 of 3)
Field Bits Access Function Default
RSRV [31:21] RO Reserved 11'b0
OUT_RTY_ENC [20] RW1C
Output port has encountered a retry condition. In all cases, this
condition is caused by the port receiving a packet-retry control
symbol. This bit is set if the OUT_RTY_STOP bit is set.
1'b0
OUT_RETRIED [19] RO
Output port has received a packet-retry control symbol and cannot
make forward progress. This bit is cleared when a packet-accepted
or packet-not-accepted control symbol is received.
1'b0
OUT_RTY_STOP [18] RO
Output port has been stopped due to a retry and is trying to recover.
When a port receives a packet_retry control symbol, it enters the
Output Retry Stopped state. In this state, the port transmits a
restart-from-retry
control symbol to its link partner. The link
partner exits the Input Retry Stopped state and normal operation
resumes. The port exits the Output Retry Stopped state.
1'b0
OUT_ERR_ENC [17] RW1C
Output port has encountered a transmission error and has possibly
recovered from it. This bit is set when the OUT_ERR_STOP bit is set.
1'b0
OUT_ERR_STOP [16] RO
Output port has been stopped due to a transmission error and is trying
to recover. The output port is in the Output Error Stopped state. The port
enters into this state when it receives a packet-not-accepted control
symbol. To exit from this state, the port issues an input-status
link-request/input-status
(restart-from-error) control symbol.
The port waits for the link-response control symbol and exits the
Output Error Stopped state.
1'b0
RSRV [15:11] RO Reserved 5'b0
IN_RTY_STOP [10] RO
Input port is stopped due to a retry. When the receiver issues a
packet-retry
control symbol to its link partner, it enters the Input
Retry Stopped state. The receiver issues a packet-retry when
sufficient buffer space is not available to accept the packet for that
specific priority. The receiver continues in the Input Retry Stopped state
until it receives a restart-from-retry control symbol.
1'b0
IN_ERR_ENC [9] RW1C
Input port has encountered a transmission error. This bit is set if the
IN_ERR_STOP
bit is set.
1'b0