Altera RapidIO II MegaCore Function User Manual
Page 158
6–20
Chapter 6: Software Interface
Physical Layer Registers
RapidIO II MegaCore Function
August 2014
Altera Corporation
User Guide
STOP_ON_PRT_FAIL_
ENCOUNTER_ENABLE
[3]
RW
Together with the DROP_PKT_ENABLE field, specifies the behavior of
the port when the failed error threshold in the Port 0 Error Rate
Threshold
register (offset 0x36C) has been reached or exceeded.
The RapidIO II IP core supports the following valid values for
{STOP_ON_PRT_FAIL_ENCOUNTER_ENABLE, DROP_PKT_ENABLE}:
2'b00—The port continues to attempt to transmit packets to the
RapidIO link partner.
2'b01—The port discards packets that receive a
packet-not-accepted
response. When the port discards a
packet, it sets the OUT_PKT_DROPD bit in the Port 0 Error and
Status
CSR (offset 0x158). The port resumes normal operation
when the value in the Error Rate Counter field of the Port 0
Error Rate
CSR (offset 0x368) falls below the failed error
threshold. This value is valid only for switch devices.
2’b10—The port stops trying to send packets to the link partner,
until software resets the OUT_FAIL_ENC field of the Port 0
Error and Status
CSR (offset 0x158). The IP core does apply
backpressure to ensure the queues do not overflow.
2’b11—The port discards all output packets, until software resets
the OUT_FAIL_ENC field of the Port 0 Error and Status CSR
(offset 0x158). When the port discards a packet, it sets the
OUT_PKT_DROPD
bit in the Port 0 Error and Status CSR.
1'b0
DROP_PKT_ENABLE
[2]
RW
Together with the STOP_ON_PRT_FAIL_ENCOUNTER_ENABLE field,
specifies the behavior of the port when the failed error threshold in
the Port 0 Error Rate Threshold register (offset 0x36C) has
been reached or exceeded.
Refer to the description of the
STOP_ON_PRT_FAIL_ENCOUNTER_ENABLE
field.
1'b0
PORT_LOCKOUT
[1]
RW
This bit indicates whether the port is stopped or the IN_PENA (bit
[21]) and OUT_PENA (bit [22]) register fields control the port:
1'b0—The Input Port Enable (IN_PENA) and Output Port Enable
(OUT_PENA) fields in this register control which packets the port
may receive and transmit on the RapidIO link.
1'b1—Port is stopped and is not enabled to issue or receive any
packets. The input port can still follow the training procedure and
can still send and respond to link-requests. All received packets
return packet-not-accepted control symbols to force an error
condition to be signaled by the sending device.
1'b0
PORT_TYPE
[0]
RO
Indicates the port type, parallel or serial.
1'b0—Parallel port.
1'b1—Serial port.
The RapidIO II IP core supports only serial ports, so this bit always
has the value of 1’b1.
1'b1
Note to
:
(1) Reflects the choice made in the RapidIO II parameter editor.
Table 6–15. Port 0 Control CSR—Offset: 0x15C (Part 4 of 4)
Field
Bits
Access
Function
Default