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Hex Dec Type/Val Lng Label (dup) Comments
---- ---- --------- ---- -------------- --------
0000 0 Structure REFBK Page References Services Parameter Block
0000 0 Signed 2 REFDIAGC Diagnose number.
0002 2 Signed 2 REFFCODE Diagnose function code.
0004 4 Signed 2 REFDWLEN Size of block in doublewords
0006 6 Signed 2 REFVERSN Version number of this REFBK
.... ...1 REFVER1 1 REFVER1 Indicates REFBK is
version 1
.... ..1. REFVER2 2 REFVER2 Indicates REFBK is
version 2
0008 8 Dbl-Word 8 * (0)
0008 8 Address 8 REFGADDR For version 2, fcn code 0, PFAULT
TOKEN, this field contains the
guest real addr of the token to
be assoc. with version 2 page
fault handshaking.
0008 8 Signed 4 REFALET For function code 03, BLOCK form
of INFORM function, this field
contains the ALET of the address
space containing the pages about
to be referenced.
000C 12 Address 4 REFADDR (0) For version 1, fcn code 0, PFAULT
TOKEN, this field contains the
guest real address of the token
to be associated with
AR-specified page fault
handshaking.
For function code 02, LIST
form of INFORM function, this
field contains the guest real
address of the page list. The
page list is a set of
ALET/page numbers.
For function code 03, BLOCK
form of INFORM function, this
field contains the starting
absolute page address of a
range of pages.
000C 12 Bitstring 3 * First part of address.
000F 15 Bitstring 1 REFADDR3 Used to check last byte.
0010 16 Signed 8 REFSELMK For version 2, fcn code 0, PFAULT
TOKEN, this field contains the
selection mask to be associated
with version 2 page fault
handshaking. Note: When not in
z/Architecture bits 33-63 are
ignored.
0010 16 Signed 4 REFCOUNT For function code 02, LIST form
of INFORM function, this field
contains the count of ALET/page
number pairs in the list pointed
to by REFADDR.
00000002 REFCTMIN 2 Minimum number of entries for
list form.
00004000 REFCTMAX 16384 Maximum number of entries
for list form.
00000010 REFGROUP REFCOUNT For function code 03,
BLOCK form of INFORM function,
this field contains the count of
the number of span of pages that
are about to be referenced.
00040000 REFGRPMX 262144 Maximum number of groups
for block form.
0014 20 Signed 4 REFSBGRP For function code 03, BLOCK form
of INFORM function, this field
contains the count of the number
of subgroup that are about to be
referenced.
00040000 REFSGPMX REFGRPMX Maximum number of
subgroups for block form.
0018 24 Signed 8 REFCMPMK For version 2, fcn code 0, PFAULT
TOKEN, this field contains the
compare mask to be associated
with version 2 page fault
handshaking. Note: When not in
z/Architecture bits 33-63 are
ignored.
0018 24 Signed 4 REFSPAN For function code 03, BLOCK form
of INFORM function, this field
contains the number of
consecutive pages that should be
condisered as a single span of
pages within the range of pages.
00040000 REFSPNMX REFGRPMX Maximum number of spans
for block form.
001C 28 Signed 4 REFSKIP For function code 03, BLOCK form
of INFORM function, this field
contains the number of pages that
should be considered as a gap
between each block. This value is
number of pages calculated by
subtracting any block ending
address (plus one) from the next
block starting address.
00020000 REFSKPMX 131072 Maximum number of skips
for block form.
0020 32 Bitstring 1 REFV2FLG Version 2 flag byte
1... .... REFZARCH X'80' REFZARCH When set, the vCPU
must be running in z/Architecture
mode. When not set, the vCPU must
be running in non z/Architecture
mode.
0021 33 Bitstring 1 * (3) Reserved for IBM use
0024 36 Signed 4 * Reserved for IBM use
0020 32 Bitstring 1 REFDIREC Byte used to indicate ascending
and descending order. It also
indicates whether REFADDR is the
lowest address or the highest.
This should be 1 (ascending) or
descending (-1), but the value is
not validated. Bit 0 is check to
see if it is ascending (0) or
descending (1).
1111 1111 REFDESCD X'FF' Minus one to indicate
descending order.
0021 33 Bitstring 1 * (3) Reserved for IBM use.
0024 36 Signed 4 * Reserved for IBM use.
00000004 REFNZTKL 4 Token area is 4 bytes when
guest is not in z/Architecture
mode.
00000008 REFZTKNL 8 Token area is 8 bytes when
guest is in z/Architecture mode.
00000028 REFLEN *-REFBK REFBK length in bytes.
00000005 REFSIZE (REFLEN+7)/8 REFBK size in
doublewords
This DSECT used to reference the list form of
REFPAGE.
Hex Dec Type/Val Lng Label (dup) Comments
---- ---- --------- ---- -------------- --------
0000 0 Structure REFENTRY Page References Services Parameter Block
0000 0 Dbl-Word 8 REFCUREN (0) Current entry.
0000 0 Address 4 REFCALET Current ALET entry.
0004 4 Address 4 REFCADDR Current address to block.
00000008 REFLSTSZ *-REFENTRY Size of entry.
0008 8 Dbl-Word 8 REFNXTEN (0) Next entry.
0008 8 Address 4 REFNALET Next ALET entry.
000C 12 Address 4 REFNADDR Next address to block.
The following is used to get count of entries per
page.
00000200 REFENPPG (*-*+4096)/(REFNXTEN-REFCUREN)
The number of entries per page.
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