PSIBK

Prolog  

Control Block Contents  
   PSIBK DSECT

Storage Layout  

Cross Reference (Contains links to field and bit definitions)  

PSIBK Prolog

 NAME       : HCPPSIBK
 DESCRIPTION: Previous System Image block
 DSECT      : PSIBK
 FUNCTION   : Defines a mapping for an area of storage that
              contains information saved over a bounce when
              the new image is not same version, release,
              modification level, and architecture as the
              previous running system.
 LOCATED BY : Entry Point HCPLODPS is where it exists.
              Temporarily exists in HCPBOU's work page during
              bounce processing.
 CREATED BY : HCPBOU  Creates a PSIBK with information about the
              system that was running.
              HCPLOD  Creates a PSIBK from the one passed by HCPBOU
              or creates a PSIBK on its own if
              HCPBOU does not pass one (bounce from old
              version of CP).
 DELETED BY : Never deleted. Storage is located within HCPLOD.
 SERIALIZED : Used only during single-threaded
              initialization and termination processing.
 RELOCATION CONSIDERATIONS : None
 COMMENTS   : If PSINAME is not "HCPPSIBK", the rest of the block
              is not valid, which means that this was a system IPL
              from the system console.
              If PSIABEND is zero, the restart was because of a
              SHUTDOWN REIPL command.

PSIBK Control Block Content

PSIBK DSECT

Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      PSIBK          Previous System Image block
0000    0 Character    8 PSINAME        Eyecatcher for PSI block; equal
                                        to "HCPPSIBK"
0008    8 Character    6 PSIVERSN       PRLVERSN from previous system
000E   14 Bitstring    2 PSIRSV1        Reserved for IBM use
0010   16 Bitstring    4 PSIABEND       PFXABEND from previous system
0014   20 Signed       4 PSISDTIM       Previous system shutdown time
0018   24 Bitstring   11 PSIDPID        Previous system path group ID
0023   35 Bitstring   17 PSIRSV2        Reserved for IBM use
          00000034       PSISIZEB       *-PSIBK Length of PSIBK in bytes
          00000007       PSISIZED       (*-PSIBK+7)/8 Length of PSIBK in
                                        DWs

PSIBK Storage Layout

          
*** PSIBK - Previous System Image block
*
*     +-------------------------------------------------------+
*   0 |                       PSINAME                         |
*     +-----------------------------------------+-------------+
*   8 |                PSIVERSN                 |  PSIRSV1    |
*     +---------------------------+-------------+-------------+
*  10 |         PSIABEND          |         PSISDTIM          |
*     +---------------------------+---------------------------+
*  18 |                       PSIDPID                         |
*     |                    +----------------------------------+
*  20 |                    |                                  |
*     +--------------------+                                  |
*     |                       PSIRSV2                         |
*     |                           +---------------------------+
*     |                           | 34
*     +---------------------------+
*
*** PSIBK - Previous System Image block

PSIBK Cross Reference

Symbol         Dspl Value
-------------- ---- -----
PSIABEND       0010
PSIDPID        0018
PSINAME        0000
PSIRSV1        000E
PSIRSV2        0023
PSISDTIM       0014
PSISIZEB       0023 00000034
PSISIZED       0023 00000007
PSIVERSN       0008