EMSBK

Prolog  

Control Block Contents  
   EMSBK DSECT

Storage Layout  

Cross Reference (Contains links to field and bit definitions)  

EMSBK Prolog

 NAME       : HCPEMSBK
 DESCRIPTION: EMERGENCY SIGNAL SIGP TASK BLOCK
 DSECT      : EMSBK
 FUNCTION   : HCPEMSBK REPRESENTS A REQUEST MADE BY ONE PROCESSOR FOR
              ANOTHER PROCESSOR TO PERFORM A PARTICULAR FUNCTION.
 LOCATED BY : PFXEMSAN  FIELD OF HCPPFXPG (ANCHOR FOR EMSBK CHAIN)
              EMSFWDPT  FORWARD CHAINED
 CREATED BY : HCPSGP    WHEN ANOTHER PROCESSOR SHOULD PERFORM A FUNCTION
 DELETED BY : HCPSGP    WHEN THE TARGET PROCESSOR HAS RECEIVED THE REQUEST
              TO PERFORM THE FUNCTION
              HCPMPS    WHEN A PROCESSOR'S STORAGE IS RELEASED DURING
              VARY OFF OF THE PROCESSOR

EMSBK Control Block Content

EMSBK DSECT

Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      EMSBK          EMERGENCY SIGNAL SIGP TASK BLOCK
0000    0 Signed       4 EMSFWDPT       FORWARD POINTER TO NEXT EMSBK
0004    4 Signed       4 EMSCPUAD (0)   EMS TO AND FROM CPU ADDRESSES
0004    4 Signed       2 EMSCPUFR       CPU FROM -- SIGNALING PROCESSOR
0006    6 Signed       2 EMSCPUTO       CPU TO -- SIGNALLED PROCESSOR
0008    8 Signed       4 EMSCODES (0)   EMS CODES
0008    8 Bitstring    1 EMSFNCD        FUNCTION CODE
          00000002       EMSFNAPR       002 FUNCTION ALTERNATE PROC
                                        RECOVERY
          00000003       EMSFNLC        003 FUNCTION LOAD CONTROL
                                        REGISTER
          00000004       EMSFNSWM       004 FUNCTION SWITCH MASTER
                                        PROCESSOR
          00000005       EMSFNSWP       005 FUNCTION SWITCH PROCESSOR
0009    9 Bitstring    1 EMSINTF        EMSBK INTERRUPT STATUS FIELD
          00000000       EMSINTNR       000 INTERRUPT NOT YET RECEIVED DO
                                        NOT UNSTACK THE BLOCK
          000000FF       EMSINTR        255 INTERRUPT HAS BEEN RECEIVED
                                        UNSTACK THE BLOCK
000A   10 Bitstring    1 EMSPARM1       BYTE PARAMETER
000B   11 Bitstring    1 *              RESERVED FOR FUTURE IBM USE
000C   12 Signed       4 EMSSAVPT       POINTER TO SAVEAREA FOR RETURN
                                        ALSO USED TO HOLD CONTROL REG
                                        DATA FOR LOAD CNTL FUNCTION
0010   16 Signed       4 EMSMASK1       FOR LCTL FUNCTION: SGPLCORN -
                                        BITS TO TURN ON SGPLCOFF - BITS
                                        TO TURN OFF SGPLCREP - BITS TO BE
                                        REPLACED
0014   20 Signed       4 EMSMASK2       FOR LCTL FUNCTION: SGPLCREP -
                                        BITS FOR REPLACEMENT
          00000003       EMSSIZE        (*-EMSBK+7)/8 SIZE IN DOUBLE
                                        WORDS

EMSBK Storage Layout

          
*** EMSBK - EMERGENCY SIGNAL SIGP TASK BLOCK
*
*     +---------------------------+-------------+-------------+
*   0 |         EMSFWDPT          |  EMSCPUFR   |  EMSCPUTO   |
*     +------+------+------+------+-------------+-------------+
*   8 |:FNCD |:INTF |:PARM1|//////|         EMSSAVPT          |
*     +------+------+------+------+---------------------------+
*  10 |         EMSMASK1          |         EMSMASK2          |
*     +---------------------------+---------------------------+
*  18
*
*** EMSBK - EMERGENCY SIGNAL SIGP TASK BLOCK

EMSBK Cross Reference

Symbol         Dspl Value
-------------- ---- -----
EMSCODES       0008
EMSCPUAD       0004
EMSCPUFR       0004
EMSCPUTO       0006
EMSFNAPR       0008 00000002
EMSFNCD        0008
EMSFNLC        0008 00000003
EMSFNSWM       0008 00000004
EMSFNSWP       0008 00000005
EMSFWDPT       0000
EMSINTF        0009
EMSINTNR       0009 00000000
EMSINTR        0009 000000FF
EMSMASK1       0010
EMSMASK2       0014
EMSPARM1       000A
EMSSAVPT       000C
EMSSIZE        0014 00000003