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CIT Build Routine z/OS V1R7.0-V1R12.0 MVS Device Validation Support SA22-7586-01 |
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To build the CITs, HCD or IPL calls the UIMs for initialization. For each control unit type that a UIM defines, it must build control unit information parameters (CIP) and call the CIT BUILD Routine. A separate CIT is built for each control unit type. A UIM invokes the CIT build routine, in 31-bit addressing mode, by using a BALR instruction. Use the standard register save area conventions. The address of the CIT build routine is in the field UCACITP in the UCA. CIT Build Routine Input Parameters A UIM provides the input to the CIT build routine in the control unit information parameters (CIP). The CIP resides in the UIM and is mapped by CBDZCIP. Registers on Entry to the CIT Build Routine
Registers on Exit from the CIT Build Routine
Return Codes
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