BPLBK | Back to Index page |
Prolog Control Block Contents BPLBK DSECT Storage Layout Cross Reference (Contains links to field and bit definitions) |
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BPLBK Prolog | Top of page |
NAME : HCPBPLBK DESCRIPTION: *BLOCKIO parameter list dsect DSECT : BPLBK FUNCTION : This DSECT maps the input parameter list sent by the guest to CP when the guest requests a multiple block I/O operation from *BLOCKIO LOCATED BY : SNDPLADR in SNDBK CREATED BY : HCPBIMMS (who copies the guest's parameter list into host storage) DELETED BY : HCPBIMMS SERIALIZED : Unique task execution VMDBK dispatch lock. BLOCKIO lock RELOCATION CONSIDERATIONS : None NOTES : When the guest sends the address in guest storage of this parameter list, it may not be word-aligned. This DSECT assumes that before any fields are referenced, the parameter list has been moved into host storage and been word-aligned. References to address fields will cause an exception if this is not the case. |
BPLBK Control Block Content | Top of page |
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BPLBK Storage Layout | Top of page |
*** BPLBK - *BLOCKIO parameter list dsect * * +------+------+-------------+---------------------------+ * 0 |:RQCOD|:RETCD|/////////////| BPLBUFAD | * +------+------+-------------+---------------------------+ * 8 | BPLBKNUM |///////////////////////////| * +---------------------------+---------------------------+ * *** BPLBK - *BLOCKIO parameter list dsect |
BPLBK Cross Reference | Top of page |
Symbol Dspl Value -------------- ---- ----- BPLBKNUM 0008 BPLBUFAD 0004 BPLNXENT 0010 BPLREAD 0000 00000002 BPLRETCD 0001 BPLRQCOD 0000 BPLSIZE 0010 00000002 BPLWRITE 0000 00000001 |
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