Programming Interface Information:
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PIDAWBK
Control Block Contents
PIDAWBK DSECT
Cross Reference (Contains links to field and bit definitions)
PIDAWBK Prolog
Name : HCPPIDAW Description: Paging I/O Format 2 IDAW for paging channel programs DSECT : PIDAWBK Function : A PIDAW contains one Format 2 IDAW for allowing paging channel programs to do I/O to 64 bit host absolute addresses. Located by : PIORDWRA - Contains the pointer to the PIDAW for that PIOBK. For devices on which CKD channel programs are used, PIORDWRA in the first PIOBK in a PIOBK area points to a separate PIDAW area. For ECKD and FBA devices, PIORDWRA points to a PIDAW contained *within* the PIOBK itself. Created by : HCPRDAAT As part of initialization or during ATTACH time for CP-owned volumes (explicitly, separately from the PIOBK, for devices on which CKD channel programs are used, or implicitly, as part of the PIOBK, for ECKD and FBA devices). Deleted by : HCPRDDDT Released if the CP owned volume is DETACHed Comments :
PIDAWBK Control Block Content
PIDAWBK DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure PIDAWBK Paging I/O Format 2 IDAW for paging 0000 0 Dbl-Word 8 PIDAW One paging IDAW (format 2) 0008 8 Dbl-Word 8 PIDAWNXT (0) Next PIDAW 00000008 PIDAWLEN *-PIDAW Size of one PIDAW in bytes 00000001 PIDAWSIZ ((*-PIDAW)+7)/8 Size of one PIDAW in dws End of PIDAW definitions
PIDAWBK Storage Layout
*** PIDAWBK - Paging I/O Format 2 IDAW for paging * * +-------------------------------------------------------+ * 0 | PIDAW | * +-------------------------------------------------------+ * *** PIDAWBK - Paging I/O Format 2 IDAW for paging
PIDAWBK Cross Reference
Symbol Dspl Value -------------- ---- ----- PIDAW 0000 PIDAWLEN 0008 00000008 PIDAWNXT 0008 PIDAWSIZ 0008 00000001
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