Programming Interface Information:
This information is NOT
intended to be
used as Programming Interfaces of VM/ESA. It is to be used for diagnosis only. |
PTTBK
Cross Reference (Contains links to field and bit definitions)
PTTBK Prolog
NAME : HCPPTTBK DESCRIPTION: HCPPTTMT parameter block DSECT : PTTBK FUNCTION : Describe the fixed parameters for a call to entry point HCPPTTMT, which is used to test for null pages (pages which have not been translated and are entirely zeroes) in a range of guest addresses. LOCATED BY : CREATED BY : HCPVCHCK - During VMDUMP processing DELETED BY : HCPVCHCK - During VMDUMP processing SERIALIZED : The PTTBK is created and deleted by a single invocation of HCPVCHCK and is not accessible to other processes. COMMENTS :
PTTBK Control Block Content
PTTBK DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure PTTBK HCPPTTMT parameter block 0000 0 Signed 4 PTTBEGIN FIRST ADDRESS IN THE RANGE 0004 4 Signed 4 PTTEND LAST ADDRESS IN THE RANGE 0008 8 Bitstring 1 PTTPGST (256) STATUS BYTES FOR EACH PAGE IN THE RANGE. MAXIMUM RANGE IS ONE MEG (I.E. ONE SEGMENT). 0108 264 Dbl-Word 8 PTTASIT ADDR SPACE ID TOKEN FOR REQUEST 1... .... PTTNULL X'80' Page is null (has not been translated and is entirely zeroes) 00000110 PTTBKLEN *-PTTBK LENGTH OF PPTBK IN BYTES 00000022 PTTSIZE (PTTBKLEN+7)/8 LENGTH OF PTTBK IN DWORDS
PTTBK Storage Layout
*** PTTBK - HCPPTTMT parameter block * * +---------------------------+---------------------------+ * 0 | PTTBEGIN | PTTEND | * +---------------------------+---------------------------+ * 8 | | * = PTTPGST = * | | * +-------------------------------------------------------+ * 108 | PTTASIT | * +-------------------------------------------------------+ * 110 * *** PTTBK - HCPPTTMT parameter block
PTTBK Cross Reference
(contains links to field and bit definitions)Symbol Dspl Value -------------- ---- -----PTTASIT 0108
PTTBEGIN 0000
PTTBKLEN 0108 00000110
PTTEND 0004
PTTNULL 0108 80
PTTPGST 0008
PTTSIZE 0108 00000022
Last updated on 3 Aug 1999 at 12:25:13 EDT.
Copyright IBM Corporation, 1990, 1999