TPH Requester Control Register @0x27c

This register can be used by the software to enable the TPH Requester Capability of the Function and to select the mode of generation of Steering Tags.

Table 1. i_TPH_req_ctrl_reg
Bits SW Name Description Reset
2:0 R/W ST Mode [CSM] This field selects the ST mode (000 = No Steering Tag Mode, 001 = Interrupt Vector Mode, 010 = Device-Specific Mode, other values are reserved). The TPH_ST_MODE output of the Controller reflects the setting of this register field. This field can also be written from the local management bus. 0x0
7:3 R RSVD RSVD 5'h00
9:8 R/W TPH Requester Enable [CRE] When set , the Function is allowed to generate requests with Transaction Processing Hints. Defined Encodings are:
  • 00b: Function operating as a Requester is not permitted to issue Requests with TPH or Extended TPH.
  • 01b: Function operating as a Requester is permitted to issue Requests with TPH and is not permitted to issue Requests with Extended TPH.
  • 10b: Reserved.
  • 11b: Function operating as a Requester is permitted to issue Requests with TPH and Extended TPH.
 0x00
31:10 R Reserved [R10] Reserved 0x0