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| SRIO Registers | |
| Table 149. Port Control CSR n (SPn_CTL) Field Descriptions (continued) |
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Bit | Field | Value | Description |
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PORT_WIDTH_OVERRIDE |
| Port width override. This | ||
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| means to override the hardware width. |
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| 000b | No override |
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| 001b | Reserved |
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| 010b | Force single lane, lane 0 |
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| 011b | Force single lane, lane 2 |
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| Reserved |
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23 | PORT_DISABLE |
| Port disable |
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| 0 | Port receivers/drivers are enabled. |
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| 1 | Port receivers/drivers are disabled and are unable to |
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| receive/transmit any packets or control symbols. |
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22 | OUTPUT_PORT_ENABLE |
| Output port enable |
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| 0 | The port is stopped and not enabled to issue any packets except | |
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| to route or respond to I/O logical maintenance packets, |
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| depending upon the functionality of the processing element. |
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| Control symbols are not affected and are sent normally. |
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| 1 | The port is enabled to issue any packets. |
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21 | INPUT_PORT_ENABLE |
| Input port receive enable |
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| 0 | The port is stopped and only enabled to route or respond I/O |
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| logical maintenance packets, depending upon the functionality of | |
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| the processing element. Other packets generate |
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| to be signaled by the sending device. Control symbols are not |
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| affected and are received and handled normally. |
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| 1 | Port is enabled to respond to any packet. |
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20 | ERROR_CHECK_DISABLE |
| Error check disable |
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| 0 | RapidIO transmission error checking and recovery are enabled. | |
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| 1 | RapiIO transmission error checking and recovery are disabled. If | |
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| an error condition occurs, device behavior is undefined. |
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19 | MULTICAST_PARTICIPANT | 0 |
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| indicate that | |
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| by this port. |
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Reserved | 0 | These |
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3 | STOP_PORT_FLD_ENC_ENABLE |
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| 0 | Even when the Output |
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| continues to attempt to transmit packets to the connected device. | |
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| 1 | When the Output | |
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| Port Error bit in the Port n Error and Status CSR and stops |
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| attempting to send packets to the connected device. Packets are | |
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| discarded if the Drop Packet Enable bit is set. |
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2 | DROP_PACKET_ENABLE |
| Drop packet enable |
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| 0 | The output port continues to try to transmit packets that have |
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| been rejected due to transmission errors. |
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| 1 | The output port drops packets that are acknowledged with a |
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| threshold is exceeded. If the port "heals", and the current error |
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| rate falls below the failed threshold, the output no longer drops |
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| packets. (switch devices only) |
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1 | PORT_LOCKOUT |
| Port lockout |
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| 0 | The port is enabled to issue any packets. |
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| 1 | The port is stopped and is not enabled to issue or receive any |
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| packets. The input port can still follow the training procedure and | |
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| can still send and respond to | |
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| return |
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| condition to be signaled by the sending device. |
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SPRUE13A |
| Serial RapidIO (SRIO) | 207 | |
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