gtpi1m24System Installation Support Reference

Suspend ECB

User exit routine UCCSUSE is called whenever an ECB that is marked as a suspendable ECB (by means of the LODIC or TMSLC macros) will be suspended during CPU loop dispatch time. Exit point SUSE is located in copy segment CLHL of CSECT CCCLHR.

General Conditions at Entry

The registers at entry to UCCSUSE are:

R1
Address of the SWB that will be placed on the suspend list.

R9
SVM address of the ECB.

R11-R15
See User Exit Routines - Common Entry Conditions.

System Conditions at Entry

System state
Supervisor

System mask
Masked for I/O and external interrupts

Protect key
0

Address Space
SVM.

Programming Considerations at Entry

Programming Considerations on Return

See User Exit Routines - Common Return Conditions.

General Conditions on Return

None.