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ECPS:MVS
~·
ECPS:MVS is a standard facility in 4381 uniprocessor model groups. It provides
13 privileged instructions and the Page Fault Assist function that are required to
execute MVS with the MYS/System Product-JES2 or MYS/System Product-JES3
program product installed in a 4381 Processor. The provided instructions are the
following:
•
ADD FRR*
FIX PAGE
•
SVC ASSIST*
•
OBTAIN LOCAL LOCK*
•
RELEASE LOCAL LOCK*
•
OBTAIN CMS LOCK*
•
RELEASE CMS LOCK*
•
TRACE SVC INTERRUPTION
•
TRACE PROGRAM INTERRUPTION
•
TRACE INITIAL SRB DISPATCH
•
TRACE
1/0
INTERRUPTION
•
TRACE TASK DISPATCH
TRACE SVC RETURN
All 13 instructions listed above and the Page Fault Assist function can be utilized
when System/370 mode is in effect. For System/370-XA mode, only the
instructions identified by an asterisk are utilized. The facilities of ECPS:MVS are
discussed in IBM System/ 3 70 Assists for MVS (GA22-7079).
Virtual Machine Extended Facility Assist is also standard to enable the ECPS:MVS
instructions to be executed directly by an MVS virtual machine without an
interruption and simulation by the VM/370 CP (Control Program).
ECPS:MVS and ECPS:VM/370 (described below) can be used concurrently to
improve performance when MVS/370 executes in a virtual machine in a VM/370
environment in a 4381 Processor.
Section 20: 4381 Processor Uniprocessor Model Groups
33
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