...
...
Word# | BITS | Name | Description | Note | ||||
---|---|---|---|---|---|---|---|---|
0 | [7:0] | Version[7:0] | SRP Version number | |||||
0 | [9:8] | OpCode[1:0] | Operation Code |
| ||||
0 | [1523:10] | SPARE[513:0] | Unused, spare bits | |||||
0[23:16] | RetryCnt[7:0] | Retry Counter | 0 | [31:24] | TimeoutCnt[7:0] | Timeout Counter |
| |
1 | [31:0] | TID[31:0] | Transaction ID | |||||
2 | [31:0] | Addr[31:0] | Register Address | In units of bytes | ||||
3 | [31:0] | Addr[63:32] | Register Address | In units of bytes | ||||
4 | [31:0] | ReqSize[31:0] | Request Size |
| ||||
5 | [31:0] | WriteData[31:0] | Write Data | Only used for write operations | ||||
... | ... | ... | ... | Only used for write operations | ||||
4+CEIL((ReqSize+1)/4) | [31:0] | WriteData[31:0] | Write Data | Only used for write operations |
...
Word# | BITS | Name | Description | Note | |||||
---|---|---|---|---|---|---|---|---|---|
0 | [7:0] | Version[7:0] | SRP Version number | Always respond with local version | |||||
0 | [9:8] | OpCode[1:0] | Operation Code | Echoed back | |||||
0 | [1523:10] | SPARE[513:0] | Unused, spare bits | Echoed back | 0 | [23:16] | RetryCnt[7:0] | Retry Counter | Echoed back |
0 | [31:24] | TimeoutCnt[7:0] | Timeout Counter | Echoed back | |||||
1 | [31:0] | TID[31:0] | Transaction ID | Echoed back | |||||
2 | [31:0] | Addr[31:0] | Register Address | Echoed back | |||||
3 | [31:0] | Addr[63:32] | Register Address | Echoed back | |||||
4 | [31:0] | ReqSize[31:0] | Request Size | Echoed back | |||||
5 | [31:0] | MemData[31:0] | Memory Data | Only used for non-posted operations | |||||
... | ... | ... | ... | Only used for non-posted operations | |||||
4+CEIL((ReqSize+1)/4) | [31:0] | MemData[31:0] | Memory Data | Only used for non-posted operations | |||||
5+CEIL((ReqSize+1)/4) | [7:0] | MemResp[7:0] | Memory Bus Response | Footer :
| |||||
5+CEIL((ReqSize+1)/4) | [8] | timeout | timeout error | Footer | |||||
5+CEIL((ReqSize+1)/4) | [9] | eofe | End of Frame with Error | Footer | |||||
5+CEIL((ReqSize+1)/4) | [10] | frameError | Framing error detected | Footer | |||||
5+CEIL((ReqSize+1)/4) | [11] | verMismatch | Version Mismatch Error | Footer | |||||
5+CEIL((ReqSize+1)/4) | [12] | reqSizeError | Request Size Error | Footer | |||||
5+CEIL((ReqSize+1)/4) | [31:13] | Reserved | Always zeros | Footer |