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Hex Dec Type/Val Lng Label (dup) Comments
---- ---- --------- ---- -------------- --------
0000 0 Structure HXPBK Hyperpav paging IO block
Define the entire HXPBK to be a power of 2 in length,
and a multiple of cache size.
0000 0 Bitstring 1 HXPCACH1 (256)
0100 256 Bitstring 1 HXPCACH2 (256)
0200 512 Bitstring 1 HXPCACH3 (256)
0300 768 Bitstring 1 HXPCACH4 (256)
0400 1024 Bitstring 1 HXPCACH5 (256)
0500 1280 Bitstring 1 HXPCACH6 (256)
0600 1536 Bitstring 1 HXPCACH7 (256)
0700 1792 Bitstring 1 HXPCACH8 (256)
0800 2048 Bitstring 1 HXPBKEND (0)
1st cache line - PHDBK
0000 0 Dbl-Word 8 HXPPHDBK (22) Header area mapped by PHDBK
The following fields are used to implement a doubly linked
chain of HXPBKs that have mapped minidisk extents. The
chain is used by monitor to provide information for
HXPBK spin locks.
The chain is anchored at HCPPGDMX. It is serialized by the
formal defer lock, HCPPGDMH.
HXPBKs are added at the chain anchor when a minidisk pool is
first identified for this HXPBK. The chain is not circular
and is terminated by zero in the pointer fields.
00B0 176 Bitstring 1 HXPMMFLG Mapped minidisk HXPBK chain flag
byte.
1... .... HXPMMONQ X'80' HXPBK is on the chain
00B1 177 Bitstring 1 * (3) Reserved for IBM use
00B4 180 Signed 4 HXPMMFWD Forward pointer to next HXPBK
associated with a mapped
minidisk. Field is zero if no
association exists or the HXPBK
is the last one on the chain.
00B8 184 Signed 4 HXPMMBCK Backward pointer to previous
HXPBK associated with a mapped
minidisk. Field is zero if no
association exists or the HXPBK
is the first one on the chain.
00000044 HXPCA1 ((256)-(*-HXPCACH1)) Nbr
available bytes
00BC 188 Bitstring 1 * (68) Reserved for IBM use
2nd cache line - HXPBK
0100 256 Dbl-Word 8 HXPC1LCK (6) Formal spin lock used for all I/O
driver non queue fields. These
are mostly in cache line 2.
0130 304 Signed 4 * Reserved for IBM use
0134 308 Bitstring 1 HXPSTATE State of HCPPAIIO routine
1111 111. HXPSTOPD 255-HXPACTIV HXPSTOPD HCPPAIIO
not active
.... ...1 HXPACTIV x'01' HXPACTIV HCPPAIIO active
.... ..1. HXPQADD x'02' HXPQADD HCPPAI QueueFrm
added to a queue
0135 309 Bitstring 1 HXPNOHPF HPF failure flags. Usage of HPF
(transport mode) has been
suspended. HXPNOHPF, HXPRTYFT,
and HXPRTYOT are used by monitor.
If changes are made here,
corresponding changes are needed
in the monitor record.
1... .... HXPNPROG X'80' An unexpected error other
than HPF feature no longer
available has occurred
.1.. .... HXPNFEAT X'40' An error occurred because
the HPF feature is no longer
available
0136 310 Signed 1 HXPRTYFT Retry count for feature lost
0137 311 Signed 1 HXPRTYOT Retry count for other failure
0138 312 Address 4 HXPtask SAVBK stacked for HCPPAIIO
013C 316 Address 4 *
0140 320 Address 4 HXPFIOR First IORBK of available list
0144 324 Address 4 HXPLIOR Last IORBK of available list
0148 328 Address 4 * Reserved
014C 332 Signed 4 HXPIORCU Current number of allocated
IORBKS
0150 336 Signed 4 HXPIORMA Maximum number of active IORBKS
0154 340 Signed 4 HXPIORAC Number of IORBKS queued to IOS
0158 344 Signed 4 HXPIORAV Number of available IORBKs
015C 348 Signed 4 HXPCURQC Cardinal count of all outstanding
paging/spooling reads/writes for
this device. Used directly by
Perfkit. Do not change offset.
0160 352 Signed 8 HXPACTFR Count of frames queued to IOS
0168 360 Signed 4 HXPPAIOC Cumulative count of times
HCPPAIIO started
016C 364 Signed 4 HXPRDEV RDEV address
00000090 HXPCA2 ((256)-(*-HXPCACH2)) Nbr
available bytes
0170 368 Bitstring 1 * (144) Reserved for IBM use
3rd and 4th cache line
- Read queue anchors, queues, lock
f-c-m means forced command mode
0200 512 Dbl-Word 8 HXPC2LCK (6) Input read queues formal spin
lock
0230 560 Address 8 HXPnrsA Queue of normal read SVGBK
0238 568 Address 8 HXPnrsL Last normal read SVGBK
0240 576 Signed 4 HXPnrsC Count of normal read SVGBK
0244 580 Signed 4 * Reserved
0248 584 Signed 8 * Reserved
0250 592 Address 8 HXPnrfA Queue of normal read FRMTE
0258 600 Address 8 HXPnrfL Last normal read FRMTE
0260 608 Signed 4 HXPnrfC Count of normal read FRMTE
0264 612 Signed 4 * Reserved
0268 616 Signed 8 * Reserved
These following queues are for I/Os forced to Command Mode
even if HPF Transport Mode is supported/allowed
0270 624 Address 8 HXPfrsA Queue of f-c-m read SVGBK
0278 632 Address 8 HXPfrsL Last f-c-m read SVGBK
0280 640 Signed 4 HXPfrsC Count of f-c-m read SVGBK
0284 644 Signed 4 * Reserved
0288 648 Signed 8 * Reserved
0290 656 Address 8 HXPfrfA Queue of f-c-m read FRMTE
0298 664 Address 8 HXPfrfL Last f-c-m read FRMTE
02A0 672 Signed 4 HXPfrfC Count of f-c-m read FRMTE
02A4 676 Signed 4 * Reserved
02A8 680 Signed 8 * Reserved
End of cache line
00000150 HXPCA3 ((512)-(*-HXPCACH3)) Nbr
available bytes
02B0 688 Bitstring 1 * (336) Reserved for IBM use
5th and 6th cache lines
- Write queue anchors, counts, lock
f-c-m means forced command mode
0400 1024 Dbl-Word 8 HXPC3LCK (6) Input write queues formal spin
lock
0430 1072 Address 8 HXPnwsA Queue of normal write SVGBK
0438 1080 Address 8 HXPnwsL Last normal write SVGBK
0440 1088 Signed 4 HXPnwsC Count of normal write SVGBK
0444 1092 Signed 4 * Reserved
0448 1096 Signed 8 * Reserved
0450 1104 Address 8 HXPnwfA Queue of normal write FRMTE
0458 1112 Address 8 HXPnwfL Last normal write FRMTE
0460 1120 Signed 4 HXPnwfC Count of normal write FRMTE
0464 1124 Signed 4 * Reserved
0468 1128 Signed 8 * Reserved
These following queues are for I/Os forced to Command Mode
even if HPF Transport Mode is supported/allowed
0470 1136 Address 8 HXPfwsA Queue of f-c-m write SVGBK
0478 1144 Address 8 HXPfwsL Last f-c-m write SVGBK
0480 1152 Signed 4 HXPfwsC Count of f-c-m write SVGBK
0484 1156 Signed 4 * Reserved
0488 1160 Signed 8 * Reserved
0490 1168 Address 8 HXPfwfA Queue of f-c-m write FRMTE
0498 1176 Address 8 HXPfwfL Last f-c-m write FRMTE
04A0 1184 Signed 4 HXPfwfC Count of f-c-m write FRMTE
04A4 1188 Signed 4 * Reserved
04A8 1192 Signed 8 * Reserved
End of cache line
00000150 HXPCA5 ((512)-(*-HXPCACH5)) Nbr
available bytes
04B0 1200 Bitstring 1 * (336) Reserved for IBM use
7th and 8th cache lines
- Task serialized queue pointers and counts
0600 1536 Address 8 HXPnrsAL Queue of normal read SVGBK Local
0608 1544 Address 8 HXPnrsLL Last normal read SVGBK Local
0610 1552 Address 8 HXPnrfAL Queue of normal read FRMTE Local
0618 1560 Address 8 HXPnrfLL Last normal read FRMTE Local
0620 1568 Address 8 HXPnwsAL Queue of normal write SVGBK Local
0628 1576 Address 8 HXPnwsLL Last normal write SVGBK Local
0630 1584 Address 8 HXPnwfAL Queue of normal write FRMTE Local
0638 1592 Address 8 HXPnwfLL Last normal write FRMTE Local
0640 1600 Address 8 HXPfrsAL Queue of f-c-m read SVGBK Local
0648 1608 Address 8 HXPfrsLL Last f-c-m read SVGBK Local
0650 1616 Address 8 HXPfrfAL Queue of f-c-m read FRMTE Local
0658 1624 Address 8 HXPfrfLL Last f-c-m read FRMTE Local
0660 1632 Address 8 HXPfwsAL Queue of f-c-m write SVGBK Local
0668 1640 Address 8 HXPfwsLL Last f-c-m write SVGBK Local
0670 1648 Address 8 HXPfwfAL Queue of f-c-m write FRMTE Local
0678 1656 Address 8 HXPfwfLL Last f-c-m write FRMTE Local
0680 1664 Signed 4 HXPnrsCL Count of normal read SVGBK Local
0684 1668 Signed 4 HXPnrfCL Count of normal read FRMTE Local
0688 1672 Signed 4 HXPnwsCL Count of normal write SVGBK Local
068C 1676 Signed 4 HXPnwfCL Count of normal write FRMTE Local
0690 1680 Signed 4 HXPfrsCL Count of f-c-m read SVGBK Local
0694 1684 Signed 4 HXPfrfCL Count of f-c-m read FRMTE Local
0698 1688 Signed 4 HXPfwsCL Count of f-c-m write SVGBK Local
069C 1692 Signed 4 HXPfwfCL Count of f-c-m write FRMTE Local
06A0 1696 Bitstring 1 HXPFLAGC Capability flags This field is
used by monitor. If changes are
made here, corresponding changes
are needed in the monitor record.
1... .... HXPHPAV X'80' The last I/O to this volume
requested alias use. HyperPav is
enabled and the device is a
HyperPav base. The I/O subsystem
determines if the I/O is executed
on an alias device
.1.. .... HXPHPF X'40' The last I/O to this volume
was a transport mode channel
program. HPF is enabled and the
device and channel are HPF
capable
..1. .... HXPFCMD X'20' The last I/O to this volume
was a command mode channel
program because it was directed
to a minidisk on the volume or
was a retry from an HPF error
06A1 1697 Bitstring 1 HXPIFLAG Internal processing flags
1... .... HXPCPHPF X'80' HXPCPHPF This channel
program is using HPF
06A2 1698 Bitstring 1 * (2) Reserved for IBM use
0000015C HXPCA7 ((512)-(*-HXPCACH7)) Nbr
available bytes
06A4 1700 Bitstring 1 * (348) Reserved for IBM use
End of HXPBK
00000800 HXPBSIZE *-HXPBK Size of this DSECT in
Bytes
00000100 HXPSIZE (((*-HXPBK)+7)/8) Size in
double-words
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