The input is a parameter list mapped by the macro EDGLCSUP, shown in OAM interface: EDGLCSUP. The parameter list describes the OAM installation exit calling EDGLCSUX and provides the address of the information passed to the exit.

In the EDGLCSUP macro, the field LCSUP_LCSPL must contain the pointer to the OAM installation exit parameter list, which is the value in register 1 on entry to the OAM exit. The OAM installation exit parameter list macros are used to map this data. See z/OS DFSMS OAM Planning, Installation, and Storage Administration Guide for Tape Libraries for more information about CBRUXCPL, CBRUXEPL, CBRUXJPL, and CBRUXNPL.

Complete the LCSUP_FUNCTION field each time EDGLCSUX is called to indicate which OAM exit is calling it. Select from LCSUP_CUA, LCSUP_EJC, LCSUP_ENT, LCSUP_VNL, and LCSUP_ACTVNL.

The parameter list EDGLCSUP includes output fields for the OAM return code LCSUP_LCSRC and the DFSMSrmm reason code LCSUP_LCSRS. The fields LCSUP_LCSRC and LCSUP_LCSRS contain a reason code from DFSMSrmm and a return code to pass back to OAM. The LCSUP_LCSRC field contains the value that is recommended by DFSMSrmm to be returned for this OAM request. The supplied DFSMSrmm OAM installation exits pass back these values. For example, if the LCSUP_LCSRC value is 4, DFSMSrmm has updated the OAM parameter list during processing. You can also use the return and reason codes set in register 15 and register 0 after the call to EDGLCSUX to determine the processing you might want to perform.

On entry, register 13 contains the address of a standard 18 word save area and register 14 contains the return address.