(FILECREATED "20-Jun-86 16:22:30" {ERIS}<LISPCORE>SOURCES>LLFAULT.;71 464442Q
changes to: (VARS LLFAULTCOMS)
previous date: "16-Jun-86 11:32:36" {ERIS}<LISPCORE>SOURCES>LLFAULT.;70)
(* Copyright (c) 1982, 1983, 1984, 1985, 1986 by Xerox Corporation. All rights reserved.)
(PRETTYCOMPRINT LLFAULTCOMS)
(RPAQQ LLFAULTCOMS
[(FNS \FAULTHANDLER)
(VARS (FAULTTEST T))
(FNS \FAULTINIT \D01.FAULTINIT \D01.ASSIGNBUFFERS)
(FNS \DOVE.FAULTINIT \DL.FAULTINIT \DL.NEWFAULTINIT \DL.UNMAPPAGES \DL.MARK.PAGES.UNAVAILABLE
\DL.ASSIGNBUFFERS \CHAIN.UP.RPT)
(FNS \PAGEFAULT \INVALIDADDR \INVALIDVP \FLUSHPAGE \LOADVMEMPAGE \MOVEREALPAGE \LOOKUPPAGEMAP
\VALIDADDRESSP \LOCKEDPAGEP \SELECTREALPAGE \SPECIALRP \TRANSFERPAGE \UPDATECHAIN)
(FNS \NEWPAGE \DONEWPAGE \ASSURE.FPTOVP.PAGE \MAKESPACEFORLOCKEDPAGE \MOVEVMEMFILEPAGE
\NEWEPHEMERALPAGE \DONEWEPHEMERALPAGE \LOCKPAGES \DOLOCKPAGES \TEMPLOCKPAGES
\DOTEMPLOCKPAGES \TEMPUNLOCKPAGES \UNLOCKPAGES \FLUSHVM \LOGOUT0 \DOFLUSHVM
\RELEASEWORKINGSET \WRITEDIRTYPAGE \WRITEDIRTYPAGE1 \COUNTREALPAGES)
(FNS \DOCOMPRESSVMEM VMEM.PURE.STATE)
(FNS 32MBADDRESSABLE \SET.VMEM.FULL.STATE \DOVMEMFULLINTERRUPT \FLUSHVMOK?)
(INITVARS (\UPDATECHAINFREQ 100)
(\PAGEFAULTCOUNTER 0)
(\DIRTYPAGECOUNTER 0)
(\DIRTYPAGEHINT 0)
(\LASTACCESSEDVMEMPAGE 0)
(\MAXSHORTSEEK 1000)
(\MINSHORTSEEK 20)
(\MAXCLEANPROBES 20)
(\VMEM.INHIBIT.WRITE)
(\VMEM.PURE.LIMIT)
(\VMEM.FULL.STATE)
(\GUARDVMEMFULL 500)
(VMEM.COMPRESS.FLG)
(\DOFAULTINIT 0)
(\VMEMACCESSFN)
(\SYSTEMCACHEVARS)
(\MAXSWAPBUFFERS 1)
(\EXTENDINGVMEMFILE)
(\MaxScreenPage 0)
(\NEWVMEMPAGEADDED))
(INITVARS (\LASTDIRTYCNT)
(\LASTDIRTYFOUND)
(\LASTDIRTYSCANPTR)
(\DIRTYSEEKMAX 50))
(COMS (* Errors)
(FNS \MP.ERROR))
(COMS (* Debugging)
(FNS \ACTONVMEMFILE \SHOWPAGETABLE CHECKPAGEMAP CHECKFPTOVP CHECKFPTOVP1 \PRINTFPTOVP
\PRINTVP))
(E (RESETSAVE (RADIX 8)))
(DECLARE: EVAL@COMPILE DONTCOPY (MACROS \ACTONVMEMFILE .VMEM.CONSISTENTP. .LOCKABLERP.)
(COMS (* Virtual page flags)
(CONSTANTS \VMAP.DIRTY \VMAP.CLEAN \VMAP.REF \VMAP.VACANT \VMAP.FLAGS
\VMAP.NOTFLAGS)
(RECORDS VMEMFLAGS)
(MACROS LOGNOT16))
(COMS (* RPT constants)
(CONSTANTS \RPT.EMPTY \RPT.UNAVAILABLE \PAGETABLESTOPFLG \RPTENTRYLENGTH)
(RECORDS RPT RPT1)
(MACROS RPFROMRPT RPTFROMRP NPAGESMACRO))
(COMS (* Virtual to file pagemap)
(EXPORT (CONSTANTS \MAXFILEPAGE))
(CONSTANTS \EMPTYPMTENTRY)
(RECORDS VP)
(MACROS .PAGEMAPBASE.))
(COMS (* FP to VP stuff)
(RECORDS FPTOVP)
(CONSTANTS \NO.VMEM.PAGE)
(MACROS DLRPFROMFP DLFPFROMRP))
(PROP DOPVAL \TOUCHPAGE TIMES3)
(COMS (* Locked page table)
(MACROS .LOCKEDVPBASE. .LOCKEDVPMASK.))
(CONSTANTS \MAXDIRTYSCANCOUNT \MINVMEMSPAREPAGES \DLBUFFERPAGES)
(CONSTANTS 2MBPAGES)
(GLOBALVARS \UPDATECHAINFREQ \REALPAGETABLE \RPTLAST \RPOFFSET \RPTSIZE
\LOCKEDPAGETABLE \EMBUFBASE \EMBUFVP \EMBUFRP \PAGEFAULTCOUNTER \LASTDIRTYCNT
\LASTDIRTYFOUND \LASTDIRTYSCANPTR \MACHINETYPE \LASTACCESSEDVMEMPAGE
\MAXSHORTSEEK \MAXCLEANPROBES \MINSHORTSEEK \DIRTYSEEKMAX \DIRTYPAGECOUNTER
\DIRTYPAGEHINT \VMEM.INHIBIT.WRITE \VMEM.PURE.LIMIT \VMEM.FULL.STATE
\GUARDVMEMFULL VMEM.COMPRESS.FLG \KBDSTACKBASE \MISCSTACKBASE \DOFAULTINIT
\FPTOVP \VMEMACCESSFN \SYSTEMCACHEVARS \LASTVMEMFILEPAGE \EXTENDINGVMEMFILE
\MaxScreenPage \NEWVMEMPAGEADDED)
(GLOBALVARS \#SWAPBUFFERS \#EMUBUFFERS \#DISKBUFFERS \MAXSWAPBUFFERS \EMUSWAPBUFFERS
\EMUBUFFERS \TELERAIDBUFFER \EMUDISKBUFFERS \EMUDISKBUFEND)
(MACROS RWMufMan)
(CONSTANTS (DOLOCKCHECKS NIL)))
[COMS (* * MAKEINIT stuff)
(FNS ADDPME CHECKIFPAGE DUMPINITPAGES MAKEROOMFORPME MAPPAGES READPAGEMAP
READPAGEMAPBLOCK SETUPPAGEMAP)
(DECLARE: DONTCOPY (MACROS CHECKIF)
(ADDVARS (INEWCOMS (FNS DUMPINITPAGES)
(VARS INITCONSTANTS)
(FNS SETUPPAGEMAP ADDPME MAKEROOMFORPME MAPPAGES))
(RDCOMS (FNS READPAGEMAP READPAGEMAPBLOCK CHECKIFPAGE \LOCKEDPAGEP
\LOOKUPPAGEMAP CHECKPAGEMAP CHECKFPTOVP CHECKFPTOVP1
\SHOWPAGETABLE \PRINTFPTOVP))
(EXPANDMACROFNS CHECKIF .LOCKEDVPBASE. .LOCKEDVPMASK. .PAGEMAPBASE.)
(MKI.SUBFNS (\NEWPAGE . MKI.NEWPAGE)
(\LOCKPAGES . MKI.LOCKPAGES))
(RD.SUBFNS (\NEWPAGE . VNEWPAGE)
(\LOCKPAGES . VLOCKPAGES))
(RDPTRS (\REALPAGETABLE))
(RDVALS (\RPTSIZE)))
EVAL@COMPILE
(ADDVARS (DONTCOMPILEFNS DUMPINITPAGES SETUPPAGEMAP ADDPME MAKEROOMFORPME
MAPPAGES READPAGEMAP READPAGEMAPBLOCK CHECKIFPAGE]
(FNS \LOCKFN \LOCKCODE \LOCKVAR \LOCKCELL \LOCKWORDS)
[DECLARE: DONTCOPY
(ADDVARS (INEWCOMS (FNS \LOCKFN \LOCKVAR \LOCKCELL \LOCKWORDS \LOCKCODE)
(ALLOCAL (ADDVARS (LOCKEDFNS \FAULTHANDLER \FAULTINIT \DOVE.FAULTINIT
\D01.FAULTINIT \DL.FAULTINIT \CHAIN.UP.RPT
\MAKESPACEFORLOCKEDPAGE \PAGEFAULT \WRITEMAP
\LOOKUPPAGEMAP \LOCKEDPAGEP \LOADVMEMPAGE
\MOVEREALPAGE \INVALIDADDR \INVALIDVP
\SELECTREALPAGE \TRANSFERPAGE \SPECIALRP
\UPDATECHAIN \MARKPAGEVACANT \FLUSHPAGE
\CLEARWORDS \FLUSHVM \DONEWPAGE
\ASSURE.FPTOVP.PAGE \DONEWEPHEMERALPAGE
\WRITEDIRTYPAGE1 \COPYSYS0 \COPYSYS0SUBR
\RELEASEWORKINGSET \DOFLUSHVM \DOLOCKPAGES
\DOTEMPLOCKPAGES \TEMPUNLOCKPAGES \MP.ERROR
RAID \DL.NEWFAULTINIT
\DL.MARK.PAGES.UNAVAILABLE \DL.UNMAPPAGES
\DL.ASSIGNBUFFERS \D01.ASSIGNBUFFERS
\DOCOMPRESSVMEM \MOVEVMEMFILEPAGE
\SET.VMEM.FULL.STATE \HINUM \LONUM \ATOMCELL
SETTOPVAL)
(LOCKEDVARS \REALPAGETABLE \RPTLAST \PAGEFAULTCOUNTER
\UPDATECHAINFREQ \RPOFFSET \RPTSIZE
\LOCKEDPAGETABLE \EMBUFBASE \EMBUFVP \EMBUFRP
\LASTACCESSEDVMEMPAGE \MAXSHORTSEEK
\MAXCLEANPROBES \MINSHORTSEEK \DIRTYPAGECOUNTER
\DIRTYPAGEHINT \VMEM.INHIBIT.WRITE
\VMEM.PURE.LIMIT \VMEM.FULL.STATE
\GUARDVMEMFULL VMEM.COMPRESS.FLG \KBDSTACKBASE
\MISCSTACKBASE \DOFAULTINIT \FPTOVP
\MACHINETYPE \VMEMACCESSFN \TELERAIDBUFFER
\EMUDISKBUFFERS \EMUDISKBUFEND \MAXSWAPBUFFERS
\EMUBUFFERS \#EMUBUFFERS \#SWAPBUFFERS
\#DISKBUFFERS \RCLKSECOND \RCLKMILLISECOND
\VALSPACE \EMUSWAPBUFFERS \EM.CURSORBITMAP
\PAGEMAP \PageMapTBL \IOCBPAGE \IOPAGE
\MISCSTATS \DEFSPACE \InterfacePage
\LASTVMEMFILEPAGE \DoveIORegion \MaxScreenPage
\NEWVMEMPAGEADDED]
(DECLARE: DONTEVAL@LOAD DOEVAL@COMPILE DONTCOPY COMPILERVARS (ADDVARS (NLAMA)
(NLAML)
(LAMA VMEM.PURE.STATE])
(DEFINEQ
(\FAULTHANDLER
[LAMBDA NIL (* bvm: "31-MAR-83 17:34")
(PROG NIL
LP [OR (AND \DOFAULTINIT (\FAULTINIT))
(\PAGEFAULT (\VAG2 (fetch (IFPAGE FAULTHI) of \InterfacePage)
(fetch (IFPAGE FAULTLO) of \InterfacePage]
(\CONTEXTSWITCH \FAULTFXP)
(GO LP])
)
(RPAQQ FAULTTEST T)
(DEFINEQ
(\FAULTINIT
[LAMBDA NIL (* ejs: "11-Nov-85 20:44")
(* * retrieves some constants from Interface page for the swapper and performs
other initialization that must happen immediately.
Called when starting up, and also when \FAULTHANDLER context starts, in case
init hasn't happened yet, as e.g. from MAKEINIT)
(OR (NEQ (fetch FPTOVPStart of \InterfacePage)
0)
(\MP.ERROR \MP.OBSOLETEVMEM "No FPTOVP"))
(SETQ \MACHINETYPE (fetch MachineType of \InterfacePage))
(COND
((AND (NEQ 0 (fetch (IFPAGE FullSpaceUsed) of \InterfacePage))
(SELECTC \MACHINETYPE
(\DORADO NIL)
(\DANDELION (EQ 0 (fetch (IFPAGE DL24BitAddressable) of \InterfacePage)))
(\DAYBREAK NIL)
T))
(\MP.ERROR \MP.32MBINUSE "Sysout contains virtual pages not addressable by machine")))
(SETQ \LASTDIRTYSCANPTR)
(SELECTC \MACHINETYPE
(\DANDELION (\DL.FAULTINIT))
(\DAYBREAK (\DOVE.FAULTINIT))
(\D01.FAULTINIT)) (* Have to set \EM.CURSORBITMAP before
faults can happen)
(* But you can't call \SETIOPOINTERS
on a Daybreak until after the Dove IO
Region is mapped, which happens in
\DL.NEWFAULTINIT)
(\SETIOPOINTERS)
(COND
((IGREATERP (fetch (IFPAGE NActivePages) of \InterfacePage)
(IDIFFERENCE \LASTVMEMFILEPAGE \GUARDVMEMFULL))
(* Vmem getting full!)
(\SET.VMEM.FULL.STATE)))
(COND
((EQ (PROG1 \DOFAULTINIT (SETQ \DOFAULTINIT NIL))
T) (* true after \FLUSHVM.
Need to rebuild some contexts)
(replace (IFPAGE KbdFXP) of \InterfacePage with (\MAKEFRAME (COND
((fetch (LITATOM CCODEP)
of (QUOTE \KEYHANDLER))
(FUNCTION \KEYHANDLER))
(T (QUOTE \DUMMYKEYHANDLER)))
\KBDSTACKBASE
(IPLUS \KBDSTACKBASE \StackAreaSize)
0 0))
(replace (IFPAGE MiscFXP) of \InterfacePage with (\MAKEFRAME (FUNCTION \DOMISCAPPLY)
\MISCSTACKBASE
(IPLUS \MISCSTACKBASE \StackAreaSize)
0 0))
T])
(\D01.FAULTINIT
[LAMBDA NIL (* bvm: " 5-Feb-85 12:42")
(SETQ \VMEMACCESSFN (FUNCTION \M44ACTONVMEMFILE))
(SETQ \REALPAGETABLE (fetch (IFPAGE REALPAGETABLEPTR) of \InterfacePage))
(* Note: these SETQ's do not reference
count, since the values are all
smallp's and emulator addresses
(in atom space))
(SETQ \RPOFFSET (SIGNED (fetch (IFPAGE RPOFFSET) of \InterfacePage)
BITSPERWORD))
(SETQ \RPTSIZE (fetch (IFPAGE RPTSIZE) of \InterfacePage))
(* Initialize the software clocks from
alto emulator)
(\BLT (LOCF (fetch SECONDSCLOCK of \MISCSTATS))
(EMADDRESS \RTCSECONDS)
(UNFOLD 3 WORDSPERCELL))
[SETQ \RCLKMILLISECOND (CONSTANT (OR (SMALLP \ALTO.RCLKMILLISECOND)
(ERROR \ALTO.RCLKMILLISECOND
"\ALTO.RCLKMILLISECOND isn't a SMALLP???"]
(* * \ALTO.RCLKMILLISECOND must be a SMALLP here so as not to cause any refcnt
or pagefault activity. \RCLKSECOND is large and has to live on \MISCSTATS,
since there is no convenient way to lock a random cell.)
(SETQ.NOREF \RCLKSECOND (LOCF (fetch RCLKSECOND of \MISCSTATS)))
(* * Note the SETQ.NOREF for \RCLKSECOND in order to guarantee no refcnt'ing
(which might pagefault) Note that these LOADBYTE expressions are compiled as
constants)
(replace (FIXP HINUM) of \RCLKSECOND with (LOADBYTE \ALTO.RCLKSECOND 16 16))
(replace (FIXP LONUM) of \RCLKSECOND with (LOADBYTE \ALTO.RCLKSECOND 0 16))
[if (AND (EQ \MACHINETYPE \DORADO)
(ILEQ 5124 (fetch RVersion of \InterfacePage)))
then (replace NSHost0 of \InterfacePage with 0)
(replace NSHost1 of \InterfacePage with 21898)
(replace NSHost2 of \InterfacePage
with (IPLUS (MASK.1'S 15 1)
(for I (N ← 0) from 1168 to 1175
do (* Mufflers "2220Q" thru "2227Q" hold
the bits of the basic serial number)
(SETQ N (IPLUS (LLSH N 1)
(if (BITTEST (RWMufMan I)
(MASK.1'S 15 1))
then 0
else 1))) finally (RETURN N]
(\CHAIN.UP.RPT)
(\D01.ASSIGNBUFFERS])
(\D01.ASSIGNBUFFERS
[LAMBDA NIL (* bvm: "12-JUL-83 18:25")
(PROGN (* Assign swap buffer)
(SETQ \EMBUFVP (fetch (IFPAGE EMBUFVP) of \InterfacePage))
(SETQ \EMBUFBASE (EMPOINTER (UNFOLD \EMBUFVP WORDSPERPAGE)))
(SETQ \EMBUFRP (\READRP \EMBUFVP)))
(PROG ((EMBUF (fetch (IFPAGE EMUBUFFERS) of \InterfacePage))
(EMLEN (fetch (IFPAGE EMUBUFLENGTH) of \InterfacePage))
EXTRALEN NPAGES)
[add EMLEN (IDIFFERENCE EMBUF (SETQ EMBUF (CEIL EMBUF WORDSPERPAGE]
(* Round up to a page boundary and
throw out the excess)
(SETQ EXTRALEN (IMOD EMLEN WORDSPERPAGE))
(add EXTRALEN (COND
((ILESSP EXTRALEN 100)
(TIMES 2 WORDSPERPAGE))
(T WORDSPERPAGE)))
(SETQ NPAGES (FOLDLO (SETQ EMLEN (IDIFFERENCE EMLEN EXTRALEN))
WORDSPERPAGE))
(OR (IGEQ NPAGES 4)
(RAID "No swap buffer space"))
(SETQ \TELERAIDBUFFER (EMPOINTER EMBUF))
(SETQ \EMUBUFFERS (\ADDBASE \TELERAIDBUFFER WORDSPERPAGE))
(SETQ \#EMUBUFFERS (SETQ NPAGES (SUB1 NPAGES)))
(SETQ \#SWAPBUFFERS (IMIN \MAXSWAPBUFFERS (IQUOTIENT NPAGES 2)))
(SETQ \#DISKBUFFERS (IDIFFERENCE \#EMUBUFFERS \#SWAPBUFFERS))
(SETQ \EMUDISKBUFFERS \EMUBUFFERS)
(SETQ \EMUDISKBUFEND (\ADDBASE \EMUDISKBUFFERS (UNFOLD \#DISKBUFFERS WORDSPERPAGE)))
(SETQ \EMUSWAPBUFFERS \EMUDISKBUFEND)
(\INITBFS (\ADDBASE \EMUBUFFERS (UNFOLD NPAGES WORDSPERPAGE))
EXTRALEN T])
)
(DEFINEQ
(\DOVE.FAULTINIT
[LAMBDA NIL (* ejs: "14-Oct-85 00:37")
(DECLARE (GLOBALVARS \RCLKMILLISECOND \RCLKSECOND))
(SETQ \VMEMACCESSFN (FUNCTION \DOVE.ACTONVMEMFILE))
(SETQ \IOCBPAGE (create POINTER
PAGE# ← \VP.IOCBS))
(COND
((NOT (.VMEM.CONSISTENTP.))
(\MP.ERROR \MP.INVALIDVMEM)))
(SETMAINTPANEL 1188)
(\DL.NEWFAULTINIT)
(SETMAINTPANEL 1189)
(SETQ \RCLKMILLISECOND \DOVE.RCLKMILLISECOND)
(SETQ.NOREF \RCLKSECOND (LOCF (fetch RCLKSECOND of \MISCSTATS)))
(* Unfortunately, \DOVE.RCLKSECOND is
not smallp)
(replace (FIXP HINUM) of \RCLKSECOND with (CONSTANT (\HINUM \DOVE.RCLKSECOND)))
(replace (FIXP LONUM) of \RCLKSECOND with (CONSTANT (\LONUM \DOVE.RCLKSECOND)))
(\RCLK (LOCF (fetch BASECLOCK of \MISCSTATS))) (* Reset base clock)
(\DoveMisc.ReadGMT (LOCF (fetch SECONDSCLOCK of \MISCSTATS)))
(SETMAINTPANEL 1190)
(\PUTBASEPTR (LOCF (fetch MILLISECONDSCLOCK of \MISCSTATS))
0 NIL) (* Clear the milliseconds timer)
(\DoveMisc.ReadHostID (LOCF (fetch NSHost0 of \InterfacePage)))
(SETMAINTPANEL 1191)
(SETQ \LASTVMEMFILEPAGE (fetch (IFPAGE DLLastVmemPage) of \InterfacePage))
(\DoveDisk.Init)
(SETMAINTPANEL 1192)
(\DoveDisplay.TurnOn])
(\DL.FAULTINIT
[LAMBDA NIL (* mpl "20-Jun-85 11:37")
(SETQ \VMEMACCESSFN (FUNCTION \DL.ACTONVMEMFILE))
(SETQ \IOCBPAGE (create POINTER
PAGE# ← \VP.IOCBS))
(COND
((NOT (.VMEM.CONSISTENTP.))
(\MP.ERROR \MP.INVALIDVMEM)))
(\DL.NEWFAULTINIT)
(SETQ \RCLKMILLISECOND \DLION.RCLKMILLISECOND) (* These are fortunately both small)
(SETQ \RCLKSECOND \DLION.RCLKSECOND)
(\RCLK (LOCF (fetch BASECLOCK of \MISCSTATS))) (* Reset base clock)
[COND
((EQ (fetch DLTODVALID of \IOPAGE)
0) (* Time not valid, so store zero in
the clock)
(\PUTBASEPTR (LOCF (fetch SECONDSCLOCK of \MISCSTATS))
0 NIL))
(T (bind TMP (BASE ← (LOCF (fetch SECONDSCLOCK of \MISCSTATS)))
do (* Loop until clock reads the same as
we wrote, in case it was being updated)
(\PUTBASE BASE 1 (SETQ TMP (fetch DLTODLO of \IOPAGE)))
(\PUTBASE BASE 0 (fetch DLTODHI of \IOPAGE))
repeatuntil (EQ (fetch DLTODLO of \IOPAGE)
TMP]
(\PUTBASEPTR (LOCF (fetch MILLISECONDSCLOCK of \MISCSTATS))
0 NIL) (* Clear the milliseconds timer)
(repeatwhile (IGEQ (fetch DLPROCESSORCMD of \IOPAGE)
\DL.PROCESSORBUSY)) (* Wait for IOP readiness)
(replace DLPROCESSORCMD of \IOPAGE with \DL.READPID) (* Ask it to give the processor ID
(3 words))
(repeatwhile (IGEQ (fetch DLPROCESSORCMD of \IOPAGE)
\DL.PROCESSORBUSY))
(replace NSHost0 of \InterfacePage with (fetch DLPROCESSOR0 of \IOPAGE))
(replace NSHost1 of \InterfacePage with (fetch DLPROCESSOR1 of \IOPAGE))
(replace NSHost2 of \InterfacePage with (fetch DLPROCESSOR2 of \IOPAGE))
(SETQ \LASTVMEMFILEPAGE (fetch (IFPAGE DLLastVmemPage) of \InterfacePage))
(\DL.DISKINIT T])
(\DL.NEWFAULTINIT
[LAMBDA NIL (* bvm: " 7-Nov-85 23:32")
(* We have just started up on a DLion or Daybreak.
Boot code has loaded the first n pages of the sysout into pages 2 thru n-3,
except for the area covered by the map and IO page, and has built the map
accordingly. Our principal task is to build \REALPAGETABLE)
(PROG ((NREALPAGES (fetch (IFPAGE NRealPages) of \InterfacePage))
(FIRSTBUFFERRP \RP.STARTBUFFERS)
(SCRATCHVP \VP.INITSCRATCH)
(SCRATCHBASE (create POINTER
PAGE# ← \VP.INITSCRATCH))
FIRSTUSEFULRP IFPAGERP IOCBRP RPTBASE VP RPTPAGES FIRSTRP NDISPLAYPAGES)
[do (COND
((for I from 0 to (SUB1 \DLBUFFERPAGES) as (FPBASE ← (\ADDBASE \FPTOVP (DLFPFROMRP
FIRSTBUFFERRP
)))
by (\ADDBASE FPBASE 1) do (COND
([OR (NOT (fetch FPOCCUPIED of FPBASE))
(\LOCKEDPAGEP (SETQ VP (fetch FPVIRTUALPAGE
of FPBASE]
(* Can't use as buffer.
This is just a check for consistency;
you should pick \RP.STARTBUFFERS so
that this isn't a problem)
(RETURN T)))
(* Unmap this page so we can use it
for buffers)
(\WRITEMAP VP 0 \VMAP.VACANT))
(* Bad starting place, try again)
(add FIRSTBUFFERRP 1))
(T (RETURN]
(SETQ FIRSTUSEFULRP (IPLUS FIRSTBUFFERRP \DLBUFFERPAGES))
(PROGN (* Copy vital info that booting left
in page 1)
[COND
((EQ \MACHINETYPE \DAYBREAK)
(* Use first buffer page for IOCB page. Used to have to place this in a real
page whose page-in-segment number was the same as that of \VP.IOCBS, but that
constraint is now lifted for Daybreak.)
(SETQ IOCBRP FIRSTBUFFERRP)
(add FIRSTBUFFERRP 1))
(T (SETQ IOCBRP (IPLUS (LOGAND (SUB1 (IMIN NREALPAGES 3072))
65280)
\VP.IOCBS))
(* Put IOCB page near the end of memory, but in the first 1.5 mb so that
Burdock can see it. Temporary until Steve fixes swap code to not care what RP
contains IOCB's)
[SETQ VP (fetch FPVIRTUALPAGE of (\ADDBASE \FPTOVP (DLFPFROMRP IOCBRP]
(COND
((\LOCKEDPAGEP VP)
(\MP.ERROR \MP.IOCBPAGE))
(T (* Unmap whoever lived in our target
page)
(\WRITEMAP VP 0 \VMAP.VACANT]
(\WRITEMAP \VP.IOCBS IOCBRP \VMAP.CLEAN)
(\WRITEMAP SCRATCHVP 1 \VMAP.CLEAN)
(\BLT \IOCBPAGE SCRATCHBASE WORDSPERPAGE))
(PROGN (* Copy InterfacePage out of segment
zero)
(\WRITEMAP SCRATCHVP FIRSTBUFFERRP \VMAP.CLEAN)
(\BLT SCRATCHBASE \InterfacePage WORDSPERPAGE)
(\WRITEMAP \VP.IFPAGE (SETQ IFPAGERP FIRSTBUFFERRP)
\VMAP.CLEAN)
(add FIRSTBUFFERRP 1))
[PROGN (* Unmap everything that fell
somewhere we can't use)
(\DL.UNMAPPAGES (ADD1 \FP.IFPAGE)
(DLFPFROMRP \RP.IOPAGE)) (* real segment zero, map or IOPAGE)
(COND
((EQ \MACHINETYPE \DANDELION)
(for NEXTBANK0 from 2MBPAGES by 2MBPAGES until (IGREATERP NEXTBANK0 NREALPAGES)
do (* All the "shadows of the display bank"
in higher memory have restricted use;
take them out of commission for now)
(\DL.UNMAPPAGES NEXTBANK0 (IPLUS NEXTBANK0 PAGESPERSEGMENT -1]
(PROGN (* Copy Display into segment zero)
[SETQ NDISPLAYPAGES (COND
((EQ \MACHINETYPE \DANDELION)
(* Only lock the standard screen's worth of pages on DLion, even if there are
more because the sysout came from wide Daybreak.
Only this many need to be in the display bank, besides which there is a cursor
bank after the display; the rest can be vanilla locked pages.)
\NP.DISPLAY)
(T (IMAX \NP.DISPLAY (ADD1 \MaxScreenPage]
(* Number of display pages in use in
this image)
(for I from 0 to (SUB1 NDISPLAYPAGES) do (\WRITEMAP (IPLUS SCRATCHVP I)
(IPLUS \RP.DISPLAY I)
\VMAP.CLEAN))
(* Point scratch area at real segment
zero)
(\BLT SCRATCHBASE (create POINTER
PAGE# ← \VP.DISPLAY)
(UNFOLD NDISPLAYPAGES WORDSPERPAGE)) (* Copy display from wherever boot put
it)
(for I from 0 to (SUB1 NDISPLAYPAGES) do (\WRITEMAP (IPLUS SCRATCHVP I)
0 \VMAP.VACANT)
(\WRITEMAP (IPLUS \VP.DISPLAY I)
(IPLUS \RP.DISPLAY I)
\VMAP.CLEAN))
(* Display is now where hardware wants
it, so enable display)
(replace (IOPAGE DLDISPCONTROL) of \IOPAGE with 0))
(COND
((EQ \MACHINETYPE \DAYBREAK) (* If on a daybreak, map the I/O
region. Have to do this before calling
\DoveDisplay.ScreenWidth)
(for I from 0 to (SUB1 \DOVEIORGNSIZE) do (\WRITEMAP (IPLUS \VP.DOVEIORGN I)
(IPLUS \RP.DOVEIORGN I)
\VMAP.CLEAN))
(\DoveIO.InitializeIORegionPtrs)))
[PROG ((RPSIZE (IDIFFERENCE NREALPAGES (SETQ \RPOFFSET -1)))
(FIRSTVP \VP.RPT))
(SETQ FIRSTRP (COND
((OR (IGREATERP NDISPLAYPAGES \NP.DISPLAY)
(AND (EQ \MACHINETYPE \DAYBREAK)
(EQ (\DoveDisplay.ScreenWidth)
\WIDEDOVEDISPLAYWIDTH)))
(* Sysout was made on a large screen daybreak, or is now being run on one.
Need to make sure there is space for all that display)
\RP.AFTERDOVEDISPLAY)
(T \RP.AFTERDISPLAY))) (* Construct real page table in
segment zero after the display)
(SETQ RPTPAGES (FOLDHI (TIMES3 RPSIZE)
WORDSPERPAGE))
(COND
((IGREATERP (IPLUS RPTPAGES FIRSTRP)
PAGESPERSEGMENT)
(* No space in bank zero, so put RPT in first segment after 2 megabytes, where
the first "shadow" display bank lives. No shadow bank on Daybreak, but this is
as good a place as any)
(SETQ FIRSTRP (IMIN 2MBPAGES (IDIFFERENCE NREALPAGES RPTPAGES)))
(* IMIN because we could be on a
wide-display Daybreak with small
memory)
[COND
((IGREATERP (IPLUS FIRSTVP RPTPAGES)
\VP.BUFFERS) (* Move virtual assignment backwards
if necessary)
(SETQ FIRSTVP (IDIFFERENCE \VP.BUFFERS RPTPAGES]
(\DL.UNMAPPAGES (DLFPFROMRP FIRSTRP)
(DLFPFROMRP (IPLUS FIRSTRP RPTPAGES -1)))
(* Unmap the pages in which RPT lives.
This was already done on DLion, but
can't hurt to do it again)
))
(for I from 0 to (SUB1 RPTPAGES) do (* Assign pages to real page table now)
(\WRITEMAP (IPLUS FIRSTVP I)
(IPLUS FIRSTRP I)
\VMAP.CLEAN))
(SETQ \REALPAGETABLE (create POINTER
PAGE# ← FIRSTVP))
(\CLEARWORDS \REALPAGETABLE (TIMES3 RPSIZE))
(SETQ \RPTSIZE RPSIZE)
(COND
[(EQ \MACHINETYPE \DANDELION)
(for NEXTBANK0 from 2MBPAGES by 2MBPAGES until (IGREATERP NEXTBANK0 NREALPAGES)
do (* Mark the shadow display bank pages
unavailable)
(\DL.MARK.PAGES.UNAVAILABLE NEXTBANK0 (IPLUS NEXTBANK0 PAGESPERSEGMENT -1]
(T (* RPT itself occupies unavailable
pages; on DLion these were marked
unavailable either in segment zero
after display or as part of shadow
bank)
(\DL.MARK.PAGES.UNAVAILABLE FIRSTRP (IPLUS FIRSTRP RPTPAGES -1))
(* Also, Dove IO region is unavailable)
(\DL.MARK.PAGES.UNAVAILABLE \RP.DOVEIORGN (SUB1 (IPLUS \RP.DOVEIORGN
\DOVEIORGNSIZE]
(PROGN
(* Fill in special cases in RPT -- the display, which is not where FPTOVP says
it is, and all the pages that are unavailable for one reason or another.
Note: any page marked unavailable here MUST be unmapped by now, either because
booting never put it where FPTOVP says it would be, there's no page there to
begin with, or there's an explicit call to \WRITEMAP or \DL.UNMAPPAGES to unmap
it above)
(SETQ RPTBASE \REALPAGETABLE)
[for I from 0 to (SUB1 NDISPLAYPAGES) do (SETQ RPTBASE (\ADDBASE RPTBASE
\RPTENTRYLENGTH))
(* Fill in Display pages)
(replace (RPT VP) of RPTBASE
with (IPLUS \VP.DISPLAY I))
(replace (RPT FILEPAGE) of RPTBASE
with (DLFPFROMRP (IPLUS \RP.TEMPDISPLAY
I]
(\DL.MARK.PAGES.UNAVAILABLE NDISPLAYPAGES \RP.IOPAGE)
(* Mark rest of segment zero plus Map
and IOPAGE unavailable)
)
[PROGN (* fill in main part of RPT by reading
FPTOVP)
(for I from (ADD1 \RP.IOPAGE) to (SUB1 NREALPAGES)
as [FPBASE ← (\ADDBASE \FPTOVP (DLFPFROMRP (ADD1 \RP.IOPAGE]
by (\ADDBASE FPBASE 1) as [RPTBASE ← (fetch RPTRBASE of (RPTFROMRP (ADD1
\RP.IOPAGE
]
by (\ADDBASE RPTBASE \RPTENTRYLENGTH)
bind (LASTREALPAGE ← (DLRPFROMFP (fetch (IFPAGE NActivePages) of \InterfacePage))
)
do
(* Fill in rest of RPT from \FPTOVP. Could optimize this a little by special
casing the area occupied by the display, but this is simpler)
(COND
((fetch (RPT UNAVAILABLE) of RPTBASE))
((AND (ILEQ I LASTREALPAGE)
(fetch FPOCCUPIED of FPBASE)
[NOT (fetch (VMEMFLAGS VACANT) of (\READFLAGS (SETQ VP
(fetch FPVIRTUALPAGE
of FPBASE]
(EQ I (\READRP VP)))
(* There is a VP assigned to this filepage, and it is still there.
False for display that got moved and any real pages that didn't get filled.
LASTREALPAGE is in case the real memory is larger than the sysout --
FPTOVP does not exist all the way)
(replace (RPT VP) of RPTBASE with VP)
(replace (RPT FILEPAGE) of RPTBASE with (DLFPFROMRP I)))
(T (replace (RPT EMPTY) of RPTBASE with T]
(PROGN (* Touch up RPT with the exceptions)
(SETQ RPTBASE (fetch RPTRBASE of (RPTFROMRP IFPAGERP)))
(* Interface Page)
(replace (RPT VP) of RPTBASE with \VP.IFPAGE)
(replace (RPT FILEPAGE) of RPTBASE with \FP.IFPAGE)
(replace (RPT UNAVAILABLE) of (fetch RPTRBASE of (RPTFROMRP IOCBRP)) with T)
(* \IOCBPAGE)
(\DL.MARK.PAGES.UNAVAILABLE FIRSTBUFFERRP (SUB1 FIRSTUSEFULRP))
(* buffer pages unavailable to swapper)
)
(\CHAIN.UP.RPT)
(PROG ((NBUFFERS (IDIFFERENCE FIRSTUSEFULRP FIRSTBUFFERRP)))
(* Allocate buffers)
(for I from 0 to (SUB1 NBUFFERS) do (\WRITEMAP (IPLUS \VP.BUFFERS I)
(IPLUS FIRSTBUFFERRP I)
\VMAP.CLEAN))
(\DL.ASSIGNBUFFERS (create POINTER
PAGE# ← \VP.BUFFERS)
NBUFFERS])
(\DL.UNMAPPAGES
[LAMBDA (FIRSTFP LASTFP) (* bvm: "14-Jan-84 14:20")
(* * At initialization time, unmap anything that originally lived in filepages
FIRSTFP thru LASTFP)
(for FP from FIRSTFP to LASTFP as (FPBASE ← (\ADDBASE \FPTOVP FIRSTFP))
by (\ADDBASE FPBASE 1) when (fetch FPOCCUPIED of FPBASE)
do (\WRITEMAP (fetch FPVIRTUALPAGE of FPBASE)
0 \VMAP.VACANT])
(\DL.MARK.PAGES.UNAVAILABLE
[LAMBDA (FIRSTRP LASTRP) (* bvm: "14-Jan-84 14:32")
(for I from FIRSTRP to LASTRP as (RPTBASE ← (fetch RPTRBASE of (RPTFROMRP FIRSTRP)))
by (\ADDBASE RPTBASE \RPTENTRYLENGTH) do (replace (RPT UNAVAILABLE) of RPTBASE with T])
(\DL.ASSIGNBUFFERS
[LAMBDA (BASE NPAGES) (* bvm: "29-Jan-85 19:05")
(PROGN (* Allocate a page to hold name and
password, and perhaps other ephemeral
things)
(\CLEARWORDS BASE WORDSPERPAGE)
(replace (IFPAGE UserNameAddr) of \InterfacePage with (\LOLOC (\ADDBASE BASE 1)))
(replace (IFPAGE UserPswdAddr) of \InterfacePage with (\LOLOC (\ADDBASE BASE 33)))
(SETQ BASE (\ADDBASE BASE WORDSPERPAGE))
(add NPAGES -1))
(PROGN (* Assign swap buffer)
(SETQ \EMBUFBASE BASE)
(SETQ \EMBUFVP (fetch (POINTER PAGE#) of BASE))
(SETQ \EMBUFRP (\READRP \EMBUFVP))
(SETQ BASE (\ADDBASE BASE WORDSPERPAGE))
(add NPAGES -1))
(PROGN (* Assign ether buffers)
(replace (IFPAGE MDSZoneLength) of \InterfacePage with (UNFOLD 2 WORDSPERPAGE))
(replace (IFPAGE MDSZone) of \InterfacePage with (\LOLOC BASE))
(SETQ BASE (\ADDBASE BASE (UNFOLD 2 WORDSPERPAGE)))
(SETQ \TELERAIDBUFFER BASE)
(SETQ BASE (\ADDBASE BASE WORDSPERPAGE))
(add NPAGES -3))
(PROGN (* Divvy up buffer space)
(SETQ \#SWAPBUFFERS (SETQ \#EMUBUFFERS NPAGES))
(SETQ \#DISKBUFFERS 0)
(SETQ \EMUSWAPBUFFERS (SETQ \EMUBUFFERS BASE])
(\CHAIN.UP.RPT
[LAMBDA NIL (* bvm: "18-Dec-84 16:07")
(* * Maps over the Real Page Table as constructed so far and fleshes it out.
Assumes that the table is built, has all its VP and FILEPAGE entries set, and
that the empty and unavailable entries are so marked.
Finishes the job by chaining together the available pages and setting the
LOCKED bits)
(PROG ((RPTBASE \REALPAGETABLE)
(LASTEMPTY \REALPAGETABLE)
(LASTUSED (\ADDBASE \REALPAGETABLE 1))
FIRSTUSED)
(SETQ FIRSTUSED LASTUSED)
(* The "entry" \REALPAGETABLE is a dummy that points to the least recently used
entry. We use the second word of that dummy as a temporary chain head for the
used pages, so that we can put all the empty pages at the front of the queue.)
[for I from 1 to (SUB1 \RPTSIZE) do (SETQ RPTBASE (\ADDBASE RPTBASE \RPTENTRYLENGTH))
(COND
((fetch (RPT UNAVAILABLE) of RPTBASE))
((fetch (RPT EMPTY) of RPTBASE)
(replace (RPT NEXTRP) of LASTEMPTY with I)
(replace (RPT LOCKED) of RPTBASE with NIL)
(SETQ LASTEMPTY RPTBASE))
(T (replace (RPT NEXTRP) of LASTUSED with I)
(replace (RPT LOCKED) of RPTBASE
with (\LOCKEDPAGEP (fetch (RPT VP)
of RPTBASE)))
(SETQ LASTUSED RPTBASE]
(* Finally, link the end of empty
chain to front of in use chain)
(replace (RPT NEXTRP) of LASTEMPTY with (fetch (RPT NEXTRP) of FIRSTUSED))
(replace (RPT NEXTRP) of (SETQ \RPTLAST LASTUSED) with \PAGETABLESTOPFLG)
(replace (RPT UNAVAILABLE) of \REALPAGETABLE with T)
(* Dummy first entry)
])
)
(DEFINEQ
(\PAGEFAULT
[LAMBDA (PTR) (* bvm: "13-Aug-85 16:38")
(\CLOCK0 (LOCF (fetch SWAPTEMP0 of \MISCSTATS))) (* Note time of start)
(PROG ((VP (fetch (POINTER PAGE#) of PTR))
FLAGS FILEPAGE)
(COND
((fetch (VP INVALID) of VP) (* Map out of bounds on Dolphin always
produces -1 as the vp.
Don't know about other machines)
(\MP.ERROR \MP.MOB "Page Fault: Map out of bounds" (AND (NEQ VP 65535)
PTR)
T))
([NOT (fetch (VMEMFLAGS VACANT) of (SETQ FLAGS (\READFLAGS VP]
(\MP.ERROR \MP.RESIDENT "Fault on resident page" PTR T))
((EQ (SETQ FILEPAGE (\LOOKUPPAGEMAP VP))
0)
(\INVALIDADDR PTR))
(T (COND
((EQ (\HILOC PTR)
\STACKHI) (* should never happen.
For debugging)
(\MP.ERROR \MP.STACKFAULT "Fault on stack" PTR T)))
(\LOADVMEMPAGE VP FILEPAGE)))
(COND
(\NEWVMEMPAGEADDED (* Only happens if VMEM.PURE.STATE on)
(\ASSURE.FPTOVP.PAGE)))
[\BOXIPLUS (LOCF (fetch SWAPWAITTIME of \MISCSTATS))
(\BOXIDIFFERENCE (\CLOCK0 (LOCF (fetch SWAPTEMP1 of \MISCSTATS)))
(LOCF (fetch SWAPTEMP0 of \MISCSTATS](* Count the time used.)
(RETURN PTR])
(\INVALIDADDR
[LAMBDA (ADDR) (* bvm: " 6-AUG-83 22:25")
(\MP.ERROR \MP.INVALIDADDR "Invalid address" ADDR T])
(\INVALIDVP
[LAMBDA (VP) (* bvm: " 6-AUG-83 22:25")
(\MP.ERROR \MP.INVALIDVP "Invalid VP" VP])
(\FLUSHPAGE
[LAMBDA (RPTINDEX FROMFLUSHVM) (* bvm: "13-Aug-85 16:35")
(* * Write out real page RPTINDEX if it is dirty.)
(PROG ((RPTR (fetch RPTRBASE of RPTINDEX))
VP FP NEWFP)
(COND
([AND (fetch (RPT OCCUPIED) of RPTR)
(fetch (VMEMFLAGS DIRTY) of (\READFLAGS (SETQ VP (fetch (RPT VP) of RPTR]
(* Yes, page is dirty)
(SETQ FP (fetch (RPT FILEPAGE) of RPTR))
[COND
[(AND \VMEM.PURE.LIMIT (NOT FROMFLUSHVM)) (* Don't sully vmem;
write page out beyond the original end
of vmem)
(COND
((ILEQ FP \VMEM.PURE.LIMIT)
(COND
((fetch (RPT LOCKED) of RPTR)
(\MP.ERROR \MP.WRITING.LOCKED.PAGE)))
(SETQ NEWFP (add (fetch NActivePages of \InterfacePage)
1))
(COND
((IGREATERP NEWFP (IDIFFERENCE \LASTVMEMFILEPAGE \GUARDVMEMFULL))
(\SET.VMEM.FULL.STATE)))
(SETQ \NEWVMEMPAGEADDED T)
(\PUTBASE (.PAGEMAPBASE. VP)
0 NEWFP)
(\PUTBASE \FPTOVP NEWFP VP)
(\PUTBASE \FPTOVP FP \NO.VMEM.PAGE)
(replace (RPT FILEPAGE) of RPTR with (SETQ FP NEWFP]
((.VMEM.CONSISTENTP.)
(replace (IFPAGE Key) of \InterfacePage with (LOGNOT16 \IFPValidKey))
(* Invalidate vmem and write out the
Interface page)
(SETQ \DIRTYPAGEHINT 0) (* So that the dirty page background
writer wakes up)
(PROG ((IFVP (fetch (POINTER PAGE#) of \InterfacePage)))
(\TRANSFERPAGE IFVP \FirstVmemBlock (RPTFROMRP (\READRP IFVP))
T NIL] (* Write it out)
(COND
((IGREATERP \DIRTYPAGEHINT 0)
(add \DIRTYPAGEHINT -1)))
(\TRANSFERPAGE VP FP RPTINDEX T NIL])
(\LOADVMEMPAGE
[LAMBDA (VPAGE FILEPAGE NEWPAGEFLG LOCK? DONTMOVETOPFLG) (* bvm: "10-Aug-85 18:08")
(* Fault in virtual page VPAGE known to live in FILEPAGE on the vmem.
NEWPAGEFLG is true if the page is new, so should just be cleared, not loaded
from vmem file. If LOCK? is true, locks down the page as well.
In this case, if on Dandelion, we also check for page wanting to live in a
particular real page. If DONTMOVETOPFLG is true, the real page we put this page
in is not promoted to the front of the LRU queue of pages)
(COND
((IGREATERP \PAGEFAULTCOUNTER \UPDATECHAINFREQ)
(\UPDATECHAIN)))
(add \PAGEFAULTCOUNTER 1)
(PROG ((RPTINDEX (\SELECTREALPAGE FILEPAGE LOCK? DONTMOVETOPFLG))
RPTBASE SPECIALRP)
(SETQ RPTBASE (fetch RPTRBASE of RPTINDEX))
[COND
((AND LOCK? (OR (EQ \MACHINETYPE \DANDELION)
(EQ \MACHINETYPE \DAYBREAK))
(SETQ SPECIALRP (\SPECIALRP VPAGE))) (* Must actually put FILEPAGE into
special RP, and thus move old contents
of SPECIALRP into RPTINDEX)
(LET* ((SRINDEX (RPTFROMRP SPECIALRP))
(SRPTR (fetch RPTRBASE of SRINDEX)))
(\MOVEREALPAGE SRINDEX SRPTR RPTINDEX RPTBASE)
(SETQ RPTINDEX SRINDEX)
(SETQ RPTBASE SRPTR] (* Fill in new RPTINDEX with
appropriate data)
(replace (RPT VP) of RPTBASE with VPAGE)
(replace (RPT FILEPAGE) of RPTBASE with FILEPAGE)
(replace (RPT LOCKED) of RPTBASE with LOCK?)
(COND
([AND DOLOCKCHECKS (NOT LOCK?)
(EQ (LRSH VPAGE 8)
(CONSTANT (\HILOC \PAGEMAP]
(\MP.ERROR \MP.MAPNOTLOCKED "Page of page map being loaded but not locked" VPAGE)))
(\TRANSFERPAGE VPAGE FILEPAGE RPTINDEX NIL NEWPAGEFLG])
(\MOVEREALPAGE
[LAMBDA (SOURCEINDEX SOURCERPT DESTINDEX DESTRPT) (* bvm: "14-Aug-85 13:53")
(* * Moves the page, if any, currently living in real page table SOURCEINDEX &
SOURCERPT into the page indicated by DESTINDEX & DESTRPT.
The destination is assumed to have been vacated)
(CHECK (NOT (fetch (RPT LOCKED) of SOURCERPT)))
(replace (RPT LOCKED) of DESTRPT with NIL)
[COND
((fetch (RPT OCCUPIED) of SOURCERPT) (* Page was not vacant to start with)
(LET* ((SOURCEVP (fetch (RPT VP) of SOURCERPT))
(SOURCEFLAGS (\READFLAGS SOURCEVP)))
(replace (RPT VP) of DESTRPT with SOURCEVP)
(replace (RPT FILEPAGE) of DESTRPT with (fetch (RPT FILEPAGE) of SOURCERPT))
(\WRITEMAP \EMBUFVP (RPFROMRPT DESTINDEX)
0) (* Map buffer to target page)
(\BLT \EMBUFBASE (create POINTER
PAGE# ← SOURCEVP)
WORDSPERPAGE) (* move data to buffer page)
(\WRITEMAP \EMBUFVP \EMBUFRP 0) (* Restore buffer to its proper page)
(\WRITEMAP SOURCEVP (RPFROMRPT DESTINDEX)
SOURCEFLAGS) (* Set flags and new RP for page)
]
DESTINDEX])
(\LOOKUPPAGEMAP
[LAMBDA (VP) (* bvm: "13-OCT-82 15:21")
(* Returns the pagemap entry for VP,
which is expected to be in bounds.
High bit of result is the lock bit.
Zero denotes absence)
(PROG [(PRIMENTRY (\GETBASE \PageMapTBL (fetch (VP PRIMARYKEY) of VP]
(RETURN (COND
((EQ PRIMENTRY \EMPTYPMTENTRY)
0)
(T (\GETBASE \PAGEMAP (IPLUS PRIMENTRY (fetch (VP SECONDARYKEY) of VP])
(\VALIDADDRESSP
[LAMBDA (BASE) (* bvm: "16-Jun-86 11:30")
(NEQ 0 (\LOOKUPPAGEMAP (fetch (POINTER PAGE#) of BASE])
(\LOCKEDPAGEP
[LAMBDA (VP TEMP) (* bvm: "18-Feb-85 18:08")
(* * True if VP is locked. If TEMP is NIL consults only the locked page table;
otherwise, also checks for "temporary" locked page)
(OR (NEQ 0 (LOGAND (.LOCKEDVPMASK. VP)
(\GETBASE (.LOCKEDVPBASE. VP)
0)))
(UNLESSRDSYS (AND TEMP (NOT (fetch (VMEMFLAGS VACANT) of (\READFLAGS VP)))
(fetch (RPT LOCKED) of (fetch RPTRBASE of (RPTFROMRP (\READRP VP])
(\SELECTREALPAGE
[LAMBDA (NEWFP LOCK? DONTMOVETOPFLG) (* bvm: "10-Aug-85 18:08")
(* Selects a real page, flushing it if necessary, and returns the RPT index of
the page. NEWFP, if supplied, is the filepage that will be read into here.
This might influence page choice by minimizing seek time.
LOCK? means caller intends to lock the page, which constrains which real pages
it can fall into. The selected page is moved to the back of the LRU queue, so
that it won't be selected again soon, unless DONTMOVETOPFLG is true.
If DONTMOVETOPFLG is REMOVE then the page is spliced out of the chain forever.)
(PROG ((TRIES 0)
(CNTR \MAXCLEANPROBES)
(DISTANCE \MINSHORTSEEK)
PREVRPT PREVINDEX RPTINDEX RPTBASE FP FLAGS)
RETRY
(SETQ PREVRPT \REALPAGETABLE)
(until (EQ (SETQ RPTINDEX (fetch (RPT NEXTRP) of PREVRPT))
\PAGETABLESTOPFLG)
do (SETQ RPTBASE (fetch RPTRBASE of RPTINDEX))
[COND
((fetch (RPT EMPTY) of RPTBASE)
(RETURN PREVRPT))
((NOT (fetch (RPT OCCUPIED) of RPTBASE))
(\MP.ERROR \MP.CHAIN.UNAVAIL "UNAVAILABLE page on Chain"))
([AND (NOT (fetch (RPT LOCKED) of RPTBASE))
[NOT (fetch (VMEMFLAGS REFERENCED) of (SETQ FLAGS (\READFLAGS
(fetch (RPT VP)
of RPTBASE]
(OR (NOT LOCK?)
(.LOCKABLERP. (RPFROMRPT RPTINDEX]
(* Page is unlocked and unreferenced, so is good candidate for flushing.
LOCK? check is to avoid locking a page into a real page that might be desired
by code that cares about real pages)
(COND
([OR (NOT (fetch (VMEMFLAGS DIRTY) of FLAGS))
(PROGN (SETQ FP (fetch (RPT FILEPAGE) of RPTBASE))
(COND
((SELECTQ \VMEM.INHIBIT.WRITE
(NIL [SELECTQ \VMEM.FULL.STATE
(NIL (* Normal, can write anything)
T)
(T (* Vmem is full and clean, don't write
anything)
NIL)
(PROGN (* Vmem is full, but sullied, so might
as well write anything for which there
is space)
(AND (ILEQ FP \LASTVMEMFILEPAGE)
(OR (NULL \VMEM.PURE.LIMIT)
(IGREATERP FP \VMEM.PURE.LIMIT])
(NEW (* Only allowed to write old pages,
since new pages might just have to get
moved a second time)
(ILEQ FP \VMEM.PURE.LIMIT))
(PROGN (* We are forbidden from writing any
page)
NIL))
(COND
((OR (ILEQ CNTR 0)
(NULL NEWFP)
(ILESSP (IABS (IDIFFERENCE FP NEWFP))
DISTANCE))
(* Page is near replacement, or we
have given up trying for closeness)
T)
(T (* Page is too far away from
replacement page)
(SETQ CNTR (SUB1 CNTR))
[COND
((ILESSP DISTANCE \MAXSHORTSEEK)
(* Get more liberal)
(SETQ DISTANCE (LLSH DISTANCE 1]
NIL]
[COND
(DOLOCKCHECKS (COND
((fetch (RPT LOCKED) of RPTBASE)
(\MP.ERROR \MP.FLUSHLOCKED
"Attempt to displace locked page" RPTBASE))
((EQ (fetch (RPT VPSEG) of RPTBASE)
(CONSTANT (\HILOC \PAGEMAP)))
(\MP.ERROR \MP.MAPNOTLOCKED
"A page of the page map is not locked" RPTBASE]
(\FLUSHPAGE RPTINDEX)
(\WRITEMAP (fetch (RPT VP) of RPTBASE)
0 \VMAP.VACANT)
(replace (RPT EMPTY) of RPTBASE with T)
(RETURN PREVRPT]
(SETQ PREVRPT RPTBASE)
(SETQ PREVINDEX RPTINDEX) finally (* Couldn't find an unreffed page
because all pages were touched since
last \UPDATECHAIN. Do another, which
clears ref bits, and try again)
(COND
((EQ TRIES 0)
(SETQ TRIES 1)
(\UPDATECHAIN))
[(AND (EQ TRIES 1)
\VMEM.INHIBIT.WRITE)
(SETQ \VMEM.INHIBIT.WRITE)
(COND
((AND (NEQ \MACHINETYPE \DANDELION)
(NEQ \MACHINETYPE \DAYBREAK))
(* Don't call RAID on a DLion, since
the interface is so bad.
Dorado user might want to know that
we're smashing \VMEM.INHIBIT.WRITE)
(RAID
"No clean vmem pages to reuse, must write one. ↑N to continue"
]
(T (\MP.ERROR \MP.SELECTLOOP
"Loop in \SELECTREALPAGE")))
(GO RETRY))
(SELECTQ DONTMOVETOPFLG
(NIL (* Move this page to head of chain, so
that it won't be picked again soon)
(replace (RPT NEXTRP) of PREVRPT with (fetch (RPT NEXTRP) of RPTBASE))
(* Splice RPTINDEX out of chain)
(replace (RPT NEXTRP) of \RPTLAST with RPTINDEX)
(* Put new page at end of chain)
(replace (RPT NEXTRP) of (SETQ \RPTLAST RPTBASE) with \PAGETABLESTOPFLG))
(REMOVE (* Splice this page out of chain
altogether)
(replace (RPT NEXTRP) of PREVRPT with (fetch (RPT NEXTRP) of RPTBASE))
(replace (RPT NEXTRP) of RPTBASE with \PAGETABLESTOPFLG))
NIL)
(RETURN RPTINDEX])
(\SPECIALRP
[LAMBDA (VP) (* edited: " 9-Aug-85 17:14")
(* for \DANDELION, some virtual pages
must be mapped into special real
pages. This function returns the
corresponding real page)
(SELECTC (FOLDLO VP PAGESPERSEGMENT)
((FOLDLO \VP.STACK PAGESPERSEGMENT)
(IPLUS VP (IDIFFERENCE \RP.STACK \VP.STACK)))
((FOLDLO \VP.DISPLAY PAGESPERSEGMENT)
(IPLUS VP (IDIFFERENCE \RP.DISPLAY \VP.DISPLAY)))
NIL])
(\TRANSFERPAGE
[LAMBDA (VP FILEPAGE RPTINDEX WRITE? NEWPAGE?) (* MPL "27-Jul-85 21:28")
(* Transfers virtual page VP between page FILEPAGE of the vmem and real page
RPTINDEX. WRITE? indicates direction of transfer.
If NEWPAGE?, then page does not exist on file, and is simply cleared)
(PROG (NEWFLAGS)
(COND
(WRITE? (FLIPCURSORBAR 15))
(T (FLIPCURSORBAR 0)))
(SETQ NEWFLAGS (COND
(NEWPAGE? \VMAP.DIRTY)
(WRITE? (LOGAND (\READFLAGS VP)
(LOGNOT16 \VMAP.DIRTY)))
(T 0)))
(COND
((AND WRITE? (fetch (RPT LOCKED) of (fetch RPTRBASE of RPTINDEX)))
(* Writing a locked page: can't diddle
map, because others might die, so do
this in the straightforward way)
(\BLT \EMBUFBASE (create POINTER
PAGE# ← VP)
WORDSPERPAGE) (* Copy page into buffer, then write
the buffer out)
(\ACTONVMEMFILE FILEPAGE \EMBUFBASE 1 T)
(SETQ \LASTACCESSEDVMEMPAGE FILEPAGE))
((NOT NEWPAGE?) (* Map the buffer page into the target
real page, read/write the page, then
set the map back)
(\WRITEMAP VP 0 \VMAP.VACANT) (* Unmap VP so that we don't have two
virtual pages pointing at same real
page)
(\WRITEMAP \EMBUFVP (RPFROMRPT RPTINDEX)
0) (* Map buffer to target page)
(\ACTONVMEMFILE FILEPAGE \EMBUFBASE 1 WRITE?) (* Do the i/o)
(\WRITEMAP \EMBUFVP \EMBUFRP 0) (* Restore buffer to its proper page)
(SETQ \LASTACCESSEDVMEMPAGE FILEPAGE)))
(\WRITEMAP VP (RPFROMRPT RPTINDEX)
NEWFLAGS) (* Set flags for page)
(COND
(NEWPAGE? (* Not on file yet, so clear it.
Couldn't do this sooner because the
flags weren't set)
(\CLEARWORDS (create POINTER
PAGE# ← VP)
WORDSPERPAGE)))
(COND
(WRITE? (FLIPCURSORBAR 15)
(\BOXIPLUS (LOCF (fetch SWAPWRITES of \MISCSTATS))
1))
(T (FLIPCURSORBAR 0)
(\BOXIPLUS (LOCF (fetch PAGEFAULTS of \MISCSTATS))
1])
(\UPDATECHAIN
[LAMBDA NIL (* bvm: "30-Jul-85 15:20")
(* Sorts the page chain by reference
bit)
(CHECK (NOT \INTERRUPTABLE))
(PROG ((RPTINDEX (fetch (RPT NEXTRP) of \REALPAGETABLE))
(CHAIN0 \REALPAGETABLE)
(CHAIN1 (\ADDBASE \REALPAGETABLE 2))
RPTR VP FLAGS HEAD1)
(SETQ HEAD1 CHAIN1)
(* HEAD1 = CHAIN1 is just a holding cell for the second Chain we temporarily
create inside here. Use the unused third word of the dummy header entry of
\REALPAGETABLE)
(replace (RPT NEXTRP) of CHAIN0 with \PAGETABLESTOPFLG)
(replace (RPT NEXTRP) of CHAIN1 with \PAGETABLESTOPFLG)
(do (SETQ RPTR (fetch RPTRBASE of RPTINDEX))
(SETQ VP (fetch (RPT VP) of RPTR))
[SETQ FLAGS (COND
((fetch (RPT EMPTY) of RPTR)
0)
(T (\READFLAGS VP]
(COND
((OR (fetch (RPT LOCKED) of RPTR)
(PROGN (COND
([AND DOLOCKCHECKS (EQ (fetch (RPT VPSEG) of RPTR)
(CONSTANT (\HILOC \PAGEMAP]
(\MP.ERROR \MP.MAPNOTLOCKED "A page of the page map is not locked"
RPTR)))
(fetch (VMEMFLAGS REFERENCED) of FLAGS)))
(* Page referenced or locked, put on
CHAIN1)
(\WRITEMAP VP (RPFROMRPT RPTINDEX)
(LOGAND FLAGS (LOGNOT16 \VMAP.REF)))(* Turn off ref bit)
(replace (RPT NEXTRP) of CHAIN1 with RPTINDEX)
(SETQ CHAIN1 RPTR))
(T (* Page was not referenced recently,
put on CHAIN0)
(replace (RPT NEXTRP) of CHAIN0 with RPTINDEX)
(SETQ CHAIN0 RPTR)))
(SETQ RPTINDEX (fetch (RPT NEXTRP) of RPTR)) (* Look at next page in old chain)
repeatuntil (EQ RPTINDEX \PAGETABLESTOPFLG))
(replace (RPT NEXTRP) of CHAIN1 with \PAGETABLESTOPFLG)
(* End of the line)
(replace (RPT NEXTRP) of CHAIN0 with (fetch (RPT NEXTRP) of HEAD1))
(* Link end of CHAIN0 to beginning of
CHAIN1)
(SETQ \RPTLAST (COND
((EQ HEAD1 CHAIN1) (* Nothing on CHAIN1 ??!!)
CHAIN0)
(T CHAIN1))) (* Pointer to end of complete chain)
(SETQ \DIRTYPAGECOUNTER (SETQ \PAGEFAULTCOUNTER 0])
)
(DEFINEQ
(\NEWPAGE
[LAMBDA (BASE NOERROR LOCK?) (* bvm: "13-Feb-85 16:48")
(* * Creates and returns a new page located at virtual addr BASE)
(UNINTERRUPTABLY
(COND
[(NOT (\MISCAPPLY* (FUNCTION \DONEWPAGE)
BASE LOCK?)) (* Failed, page exists)
(COND
((NOT NOERROR)
(\MP.ERROR \MP.NEWPAGE "Attempt to allocate already existing page" BASE T)))
(COND
(LOCK? (\LOCKPAGES BASE 1]
((IGREATERP (fetch (IFPAGE NActivePages) of \InterfacePage)
(IDIFFERENCE \LASTVMEMFILEPAGE \GUARDVMEMFULL))
(* Vmem getting full!)
(\SET.VMEM.FULL.STATE)))
BASE)])
(\DONEWPAGE
[LAMBDA (BASE LOCK? INTERNALFLG) (* bvm: "13-Aug-85 16:32")
(* * Allocates new page at BASE, locking it if LOCK? is true.
Returns vmemfile page# on success, NIL if page already exists.
Must be run in safe context! because it can cause vmem activity)
(AND \DOFAULTINIT (\FAULTINIT)) (* Only an issue when INIT.SYSOUT
starts. Perhaps there is a better
place to put this)
(PROG ((VP (fetch (POINTER PAGE#) of BASE))
MAPBASE LOCKBASE FILEPAGE NEXTPM ERRCODE)
(RETURN (COND
((fetch (VP INVALID) of VP)
(\INVALIDVP VP)
NIL)
(T (SETQ MAPBASE (\GETBASE \PageMapTBL (fetch (VP PRIMARYKEY) of VP)))
(COND
((EQ MAPBASE \EMPTYPMTENTRY) (* Need to create a new second-level
block)
(SETQ NEXTPM (fetch (IFPAGE NxtPMAddr) of \InterfacePage))
[COND
((EVENP NEXTPM WORDSPERPAGE)
(* Need a new secondary pagemap page. This recursion is ok, because we know
that SETUPPAGEMAP assures that the pagemap pages for all the pages in secondary
map space were created at MAKEINIT time)
(OR (\DONEWPAGE (\ADDBASE \PAGEMAP NEXTPM)
T T)
(RETURN (\MP.ERROR \MP.NEWMAPPAGE
"\DONEWPAGE failed to allocate new map page"]
(\PUTBASE \PageMapTBL (fetch (VP PRIMARYKEY) of VP)
NEXTPM)
(replace (IFPAGE NxtPMAddr) of \InterfacePage with (IPLUS NEXTPM
\PMblockSize))
(SETQ MAPBASE NEXTPM)))
[SETQ MAPBASE (\ADDBASE \PAGEMAP (IPLUS MAPBASE (fetch (VP SECONDARYKEY)
of VP]
(COND
((NEQ (\GETBASE MAPBASE 0)
0) (* Page exists)
(RETURN NIL)))
(SETQ FILEPAGE (add (fetch (IFPAGE NActivePages) of \InterfacePage)
1))
(replace (IFPAGE NDirtyPages) of \InterfacePage with FILEPAGE)
(* Currently a redundant field)
[COND
(LOCK? (SETQ FILEPAGE (\MAKESPACEFORLOCKEDPAGE VP FILEPAGE))
(\PUTBASE (SETQ LOCKBASE (.LOCKEDVPBASE. VP))
0
(LOGOR (.LOCKEDVPMASK. VP)
(\GETBASE LOCKBASE 0]
(\PUTBASE \FPTOVP FILEPAGE VP)
(\PUTBASE MAPBASE 0 FILEPAGE)
(\LOADVMEMPAGE VP FILEPAGE T LOCK?)
(COND
(INTERNALFLG (SETQ \NEWVMEMPAGEADDED T))
(T (* Make sure \FPTOVP extended if
necessary)
(\ASSURE.FPTOVP.PAGE)))
FILEPAGE])
(\ASSURE.FPTOVP.PAGE
[LAMBDA NIL (* bvm: "13-Aug-85 16:29")
(* Called at the end of some swapping operation that added one or more pages to
the vmem file, setting \NEWVMEMPAGEADDED true.
If we're going to need a new page of \FPTOVP soon, do it now while there's
still maneuvering room. The allowance below is for the worst case, which can
happen when VMEM.PURE.STATE is on and \NEWPAGE was called needing a new pagemap
page as well, in which case we could have as many as the following new vmem
pages before we're home safe -
1: \NEWPAGE added a page -
2: a page was displaced by the new page and written to the end of the vmem -
3: a new pagemap page was needed -
4: it displaced a page to end of vmem -
5: the new \FPTOVP page below -
6: a page displaced by same. -
-
Alternatively, it could have been the new \FPTOVP page that needed a new
pagemap block. Will never have both needing a new pagemap block, since there
are several pagemap blocks per page)
(LET ((FILEPAGE (fetch (IFPAGE NActivePages) of \InterfacePage)))
(COND
((IGREATERP (IMOD FILEPAGE WORDSPERPAGE)
(IDIFFERENCE WORDSPERPAGE 7)) (* This is a no-op if the page has
already been allocated)
(\DONEWPAGE (\ADDBASE \FPTOVP (CEIL FILEPAGE WORDSPERPAGE))
T T)))
(SETQ \NEWVMEMPAGEADDED NIL])
(\MAKESPACEFORLOCKEDPAGE
[LAMBDA (VP FILEPAGE) (* bvm: "12-Aug-85 18:34")
(* VP is a page to be locked, FILEPAGE its home.
Returns a possibly new file page where VP will now live, after having kicked
the former resident of the new file page into VP's old FILEPAGE)
(PROG (DESIREDFP OLDVP FPBASE)
[SETQ DESIREDFP (SELECTC (FOLDLO VP PAGESPERSEGMENT)
((FOLDLO \VP.STACK PAGESPERSEGMENT)
(IPLUS VP (IDIFFERENCE (DLFPFROMRP \RP.STACK)
\VP.STACK)))
((FOLDLO \VP.DISPLAY PAGESPERSEGMENT)
(* Display lives in a fixed place in
file, but does not land there
initially)
(IPLUS VP (IDIFFERENCE (DLFPFROMRP \RP.TEMPDISPLAY)
\VP.DISPLAY)))
((FOLDLO \VP.FPTOVP PAGESPERSEGMENT)
(* A new page of FPTOVP has to be
continguous on file with other such
pages)
(IPLUS VP (IDIFFERENCE (DLFPFROMRP \RP.FPTOVP)
\VP.FPTOVP)))
(COND
((AND (ILEQ FILEPAGE (fetch LastLockedFilePage of \InterfacePage))
(IGREATERP FILEPAGE (DLFPFROMRP \RP.TYPETABLE)))
(* Page is in a good place already.
It probably was once locked, then
unlocked)
(RETURN FILEPAGE))
(T (* Put it after all the other locked
pages)
(add (fetch LastLockedFilePage of \InterfacePage)
1]
(COND
((AND (fetch FPOCCUPIED of (SETQ FPBASE (\ADDBASE \FPTOVP DESIREDFP)))
(NEQ (SETQ OLDVP (fetch FPVIRTUALPAGE of FPBASE))
VP)) (* Someone else lives here, so move it
out)
(\MOVEVMEMFILEPAGE OLDVP DESIREDFP FILEPAGE)))
(RETURN DESIREDFP])
(\MOVEVMEMFILEPAGE
[LAMBDA (VP OLDFP NEWFP) (* bvm: "18-Nov-84 14:14")
(PROG ((FLAGS (\READFLAGS VP))
RP)
(COND
((fetch (VMEMFLAGS VACANT) of FLAGS) (* Page not resident, so pull it in)
(\LOADVMEMPAGE VP OLDFP)
(SETQ FLAGS \VMAP.CLEAN))
((\LOCKEDPAGEP VP)
(\MP.ERROR \MP.BADLOCKED "Locked page is in the way" VP)))
(\WRITEMAP VP (SETQ RP (\READRP VP))
(LOGOR FLAGS \VMAP.DIRTY)) (* Mark page dirty, so that it will
eventually be written to its new home)
(replace (RPT FILEPAGE) of (fetch RPTRBASE of (RPTFROMRP RP)) with NEWFP)
(* Tell RPT where VP now lives)
(\PUTBASE (.PAGEMAPBASE. VP)
0 NEWFP) (* Tell \PAGEMAP about it)
(\PUTBASE \FPTOVP NEWFP VP) (* ... and \FPTOVP)
])
(\NEWEPHEMERALPAGE
[LAMBDA (BASE NOERROR) (* bvm: "26-NOV-82 15:40")
(* * Creates and returns a new page located at virtual addr BASE, mapping it
permanently into some real page but leaving it out of the vmem file)
(\MISCAPPLY* (FUNCTION \DONEWEPHEMERALPAGE)
BASE NOERROR])
(\DONEWEPHEMERALPAGE
[LAMBDA (BASE NOERROR) (* bvm: "13-Aug-85 16:42")
(* * Creates and returns a new page located at virtual addr BASE, mapping it
permanently into some real page but leaving it out of the vmem file)
(PROG ((VP (fetch (POINTER PAGE#) of BASE))
MAPBASE PREVRP RPTINDEX RPTR)
(RETURN (COND
((fetch (VP INVALID) of VP)
(\INVALIDVP VP)
NIL)
(T (SETQ MAPBASE (\GETBASE \PageMapTBL (fetch (VP PRIMARYKEY) of VP)))
(* First check that the page doesn't
exist)
(COND
([OR (AND (NEQ MAPBASE \EMPTYPMTENTRY)
(NEQ (\GETBASE \PAGEMAP (IPLUS MAPBASE (fetch (VP SECONDARYKEY)
of VP)))
0))
(NOT (fetch (VMEMFLAGS VACANT) of (\READFLAGS VP]
(* Page is in the vmem already, so no
hope)
(COND
((NOT NOERROR)
(\MP.ERROR \MP.NEWPAGE "Page already exists " BASE T)))
(RETURN BASE)))
(COND
((IGREATERP \PAGEFAULTCOUNTER \UPDATECHAINFREQ)
(\UPDATECHAIN)))
(add \PAGEFAULTCOUNTER 1)
(SETQ RPTINDEX (\SELECTREALPAGE NIL T (QUOTE REMOVE)))
(* Find a page to put this in)
(SETQ RPTR (fetch RPTRBASE of RPTINDEX))
(* Fill in new RPTINDEX with
appropriate data)
(replace (RPT VP) of RPTR with \RPT.UNAVAILABLE)
(replace (RPT FILEPAGE) of RPTR with VP)
(* For debugging only)
(FLIPCURSORBAR 0)
(\WRITEMAP VP (RPFROMRPT RPTINDEX)
\VMAP.DIRTY) (* Set flags for page)
(\CLEARWORDS (create POINTER
PAGE# ← VP)
WORDSPERPAGE) (* Clear new page)
(FLIPCURSORBAR 0)
(\BOXIPLUS (LOCF (fetch PAGEFAULTS of \MISCSTATS))
1)
(COND
(\NEWVMEMPAGEADDED (\ASSURE.FPTOVP.PAGE)))
BASE])
(\LOCKPAGES
[LAMBDA (BASE NPAGES) (* bvm: "26-NOV-82 15:17")
(* Needs to be done in safe stack
context because might cause vmem
transfer)
(\MISCAPPLY* (FUNCTION \DOLOCKPAGES)
BASE NPAGES)
BASE])
(\DOLOCKPAGES
[LAMBDA (BASE NPAGES) (* bvm: "16-Aug-85 05:41")
(for I from 0 to (SUB1 NPAGES) bind (VP ← (fetch (POINTER PAGE#) of BASE))
FILEPAGE MAPBASE RPTBASE RPINDEX RP MASK LOCKBASE
do [COND
((fetch (VP INVALID) of VP)
(\INVALIDVP VP))
[(EQ (SETQ MAPBASE (\GETBASE \PageMapTBL (fetch (VP PRIMARYKEY) of VP)))
\EMPTYPMTENTRY)
(\INVALIDADDR (ADDBASE BASE (UNFOLD I WORDSPERPAGE]
(T [SETQ MAPBASE (\ADDBASE \PAGEMAP (IPLUS MAPBASE (fetch (VP SECONDARYKEY) of VP]
(SETQ FILEPAGE (\GETBASE MAPBASE 0))
(COND
((EQ 0 (LOGAND (SETQ MASK (.LOCKEDVPMASK. VP))
(\GETBASE (SETQ LOCKBASE (.LOCKEDVPBASE. VP))
0))) (* Not locked yet)
(COND
((fetch VACANT of (\READFLAGS VP)) (* Bring locked page into core so we
can move it if necessary)
(\LOADVMEMPAGE VP FILEPAGE NIL T)))
[SETQ RPTBASE (fetch RPTRBASE of (SETQ RPINDEX (RPTFROMRP (SETQ RP (\READRP
VP]
[COND
((AND (NOT (.LOCKABLERP. RP))
(NOT (\SPECIALRP VP)))
(* Page already swapped in, but lives in a real page that might need to get
bumped (e.g., for stack)%, so move it now.
If \SPECIALRP is true then we know that the page got swapped into the right
place, so no need to move it.)
(LET* ((NEWINDEX (\SELECTREALPAGE NIL T))
(NEWRPT (fetch RPTRBASE of NEWINDEX)))
(\MOVEREALPAGE RPINDEX RPTBASE NEWINDEX NEWRPT)
(replace (RPT EMPTY) of RPTBASE with T)
(* Mark vacated RPT entry empty)
(SETQ RPTBASE NEWRPT)
(SETQ RP (RPFROMRPT NEWINDEX]
(COND
((NEQ FILEPAGE (SETQ FILEPAGE (\MAKESPACEFORLOCKEDPAGE VP FILEPAGE)))
(* Moving to a new page, so have to
mark this locked page dirty so that it
will eventually get written to its new
home)
(\WRITEMAP VP RP (LOGOR \VMAP.DIRTY \VMAP.REF))
(replace (RPT FILEPAGE) of RPTBASE with FILEPAGE)
(\PUTBASE \FPTOVP FILEPAGE VP)
(\PUTBASE MAPBASE 0 FILEPAGE)))
(\PUTBASE LOCKBASE 0 (LOGOR MASK (\GETBASE LOCKBASE 0)))
(* Set lock bit in page map)
(replace (RPT LOCKED) of RPTBASE with T]
(add VP 1) finally (COND
(\NEWVMEMPAGEADDED (* If we had to load or rearrange
pages, vmem could have gotten bigger
if VMEM.PURE.STATE on)
(\ASSURE.FPTOVP.PAGE])
(\TEMPLOCKPAGES
[LAMBDA (BASE NPAGES) (* bvm: "10-Aug-85 18:17")
(* * "Temporarily" locks BASE for NPAGES, i.e.
ensures that the swapper will not move the pages.
Information vanishes at logout etc.)
(\MISCAPPLY* (FUNCTION \DOTEMPLOCKPAGES)
BASE NPAGES])
(\DOTEMPLOCKPAGES
[LAMBDA (BASE NPAGES) (* bvm: "10-Aug-85 18:26")
(* "Temporarily" locks BASE for NPAGES, i.e.
ensures that the swapper will not move the pages.
Information vanishes at logout etc. This function must be locked because it
manipulates the page table table. Runs in MISC context)
(to NPAGES as VP from (fetch (POINTER PAGE#) of BASE) bind RPTBASE RPINDEX RP
do (\TOUCHPAGE BASE) (* Touch page in case not resident)
[SETQ RPTBASE (fetch RPTRBASE of (SETQ RPINDEX (RPTFROMRP (SETQ RP (\READRP VP]
[COND
((NOT (.LOCKABLERP. RP))
(* Page already swapped in, but lives in a real page that might need to get
bumped (e.g., for stack)%, so move it now)
(LET* ((NEWINDEX (\SELECTREALPAGE NIL T))
(NEWRPT (fetch RPTRBASE of NEWINDEX)))
(\MOVEREALPAGE RPINDEX RPTBASE NEWINDEX NEWRPT)
(replace (RPT EMPTY) of RPTBASE with T) (* Mark vacated RPT entry empty)
(SETQ RPTBASE NEWRPT]
(replace (RPT LOCKED) of RPTBASE with T)
(SETQ BASE (\ADDBASE BASE WORDSPERPAGE])
(\TEMPUNLOCKPAGES
[LAMBDA (BASE NPAGES) (* bvm: "30-Jul-85 16:58")
(* Unlocks pages that were locked by
\TEMPLOCKPAGES. This function must be
locked because it manipulates the page
table)
(while (IGREATERP NPAGES 0) bind (VP ← (fetch (POINTER PAGE#) of BASE))
RPTR
do (UNINTERRUPTABLY
(\TOUCHPAGE BASE) (* Touch page in case not resident.
Should only happen if page wasn't
locked to begin with)
(COND
((AND (NEQ (SETQ RPTR (\READRP VP))
0)
(EQ [fetch (RPT VP) of (SETQ RPTR (fetch RPTRBASE of (RPTFROMRP RPTR]
VP))
(COND
([AND DOLOCKCHECKS (EQ (LRSH VP 8)
(CONSTANT (\HILOC \PAGEMAP]
(\MP.ERROR \MP.UNLOCKINGMAP "Attempt to unlock map page" VP)))
(replace (RPT LOCKED) of RPTR with NIL))
(T (HELP "Page table changed out from under me!" VP))))
(add VP 1)
(add NPAGES -1)
(SETQ BASE (\ADDBASE BASE WORDSPERPAGE])
(\UNLOCKPAGES
[LAMBDA (BASE NPAGES) (* bvm: "30-Jul-85 16:58")
(* * Unlocks NPAGES virtual pages from BASE onward)
(UNINTERRUPTABLY
(for I from 0 to (SUB1 NPAGES) bind (VP ← (fetch (POINTER PAGE#) of BASE))
MASK LOCKBASE
do (COND
((fetch (VP INVALID) of VP)
(\INVALIDVP VP))
((NEQ 0 (LOGAND (SETQ MASK (.LOCKEDVPMASK. VP))
(\GETBASE (SETQ LOCKBASE (.LOCKEDVPBASE. VP))
0))) (* Yes, page was locked, so turn the
bit off now)
(COND
([AND DOLOCKCHECKS (EQ (LRSH VP 8)
(CONSTANT (\HILOC \PAGEMAP]
(\MP.ERROR \MP.UNLOCKINGMAP "Attempt to unlock map page" VP)))
(\PUTBASE LOCKBASE 0 (LOGXOR MASK (\GETBASE LOCKBASE 0)))
(* Update pagemap, then update real
page table)
(replace (RPT LOCKED) of (fetch RPTRBASE of (RPTFROMRP (\READRP VP))) with NIL)))
(add VP 1)))])
(\FLUSHVM
[LAMBDA NIL (* bvm: "13-Feb-85 19:55")
(* Writes out all dirty pages to vmem,
making it consistent.
Returns NIL now, T if Bcpl starts up
the vmem)
(COND
((\FLUSHVMOK?)
(UNINTERRUPTABLY
(* Write stuff out from a safe place)
(PROG1 (COND
((\MISCAPPLY* (FUNCTION \DOFLUSHVM)) (* Return from Bcpl startup.
Need to rebuild the context, since it
was not written out consistently)
(SETQ \DOFAULTINIT T) (* Tell pagefault handler to
initialize itself. Want the
initialization to happen in Fault
context to avoid stack overflow
messiness)
(\CONTEXTSWITCH \FAULTFXP)
(for VAR in \SYSTEMCACHEVARS do (SET VAR NIL))
T))
(SETQ \DIRTYPAGEHINT 32767)))])
(\LOGOUT0
[LAMBDA (FAST) (* bvm: "13-Feb-85 20:11")
[COND
((OR (EQ (fetch MachineType of \InterfacePage)
\DORADO)
(EQ (fetch MachineType of \InterfacePage)
\DOLPHIN))
(* * If we're running on a Dolphin or Dorado, we update the alto's clock.
Note that Dandelions and Daybreaks don't have alto clocks, so this wouldn't
work on them)
(\BLT (EMADDRESS \RTCSECONDS)
(LOCF (fetch SECONDSCLOCK of \MISCSTATS))
(UNFOLD 3 WORDSPERCELL]
(UNINTERRUPTABLY
(OR (AND [OR (NOT FAST)
(AND (EQ FAST (QUOTE ?))
(NOT (.VMEM.CONSISTENTP.]
(\FLUSHVM))
(SELECTC (fetch MachineType of \InterfacePage)
(\DAYBREAK (\DoveMisc.BootButton))
(\LISPFINISH))))])
(\DOFLUSHVM
[LAMBDA NIL (* bvm: " 8-Jul-85 20:52")
(* * Write everything out in a resumable way.
Value is NIL if returned from directly, T if from saved state.
Always invoked via \MISCAPPLY*)
(CHECK (NOT \INTERRUPTABLE)) (* NOTE: need stats gathering off in
here. Also avoid touching pages)
(PROG ((IFPVP (fetch (POINTER PAGE#) of \InterfacePage))
(SCRATCHBUF \EMUSWAPBUFFERS)
IFPRPT)
(replace (IFPAGE MISCSTACKRESULT) of \InterfacePage with T)
(* This will make it look like we have
returned from BCPL if caller gets
control from the saved state)
[COND
((OR (EQ \MACHINETYPE \DANDELION)
(EQ \MACHINETYPE \DAYBREAK)) (* Mark all active stack pages dirty,
since the microcode doesn't)
(for VP from \VP.STACK to (IPLUS \VP.STACK (fetch HIBYTE of (fetch EndOfStack
of \InterfacePage)))
as RP from \RP.STACK do (\WRITEMAP VP RP (LOGOR \VMAP.REF \VMAP.DIRTY)))
(* Similarly, the GC table does not
get marked dirty)
(for VP from \VP.GCTABLE to (IPLUS \VP.GCTABLE (SUB1 \NP.GCTABLE)) as RP from
\RP.GCTABLE
do (\WRITEMAP VP RP (LOGOR \VMAP.REF \VMAP.DIRTY]
[COND
(\VMEM.PURE.LIMIT (* Maintaining file consistency: move
high water mark up)
(COND
(VMEM.COMPRESS.FLG (\DOCOMPRESSVMEM)))
(SETQ \VMEM.PURE.LIMIT (fetch (IFPAGE NActivePages) of \InterfacePage]
(COND
((.VMEM.CONSISTENTP.)
(replace (IFPAGE Key) of \InterfacePage with (LOGNOT16 \IFPValidKey))
(* Invalidate vmem and write out the
Interface page)
(\TRANSFERPAGE IFPVP \FirstVmemBlock (RPTFROMRP (\READRP IFPVP))
T NIL)))
(SETQ IFPRPT (RPTFROMRP (\READRP IFPVP)))
(for RPTINDEX from 1 to (SUB1 \RPTSIZE) do (\FLUSHPAGE RPTINDEX T)
unless (EQ RPTINDEX IFPRPT))
(replace (IFPAGE Key) of \InterfacePage with \IFPValidKey)
(\BLT SCRATCHBUF \InterfacePage WORDSPERPAGE) (* Make its current fx point at user
context, i.e. the \FLUSHVM frame)
(replace (IFPAGE CurrentFXP) of SCRATCHBUF with (fetch (IFPAGE MiscFXP) of \InterfacePage))
(\ACTONVMEMFILE (\LOOKUPPAGEMAP IFPVP)
SCRATCHBUF 1 T) (* Write the page out from a safe
place)
(RETURN NIL])
(\RELEASEWORKINGSET
[LAMBDA NIL (* bvm: "29-Nov-84 10:56")
(COND
((\FLUSHVM) (* Returning from Lisp startup)
T)
(T (* Unmap any unlocked page)
(for RPTINDEX from 1 to (SUB1 \RPTSIZE) bind RPTR
when (AND (fetch (RPT OCCUPIED) of (SETQ RPTR (fetch RPTRBASE of RPTINDEX)))
(NOT (fetch (RPT LOCKED) of RPTR))) do (\WRITEMAP (fetch (RPT VP) of RPTR)
(RPFROMRPT RPTINDEX)
\VMAP.VACANT)
(replace (RPT EMPTY) of RPTR
with T])
(\WRITEDIRTYPAGE
[LAMBDA (MINDIRTY) (* bvm: "13-Aug-85 17:51")
(COND
((OR (NOT (.VMEM.CONSISTENTP.))
(AND \VMEM.PURE.LIMIT (NEQ \VMEM.PURE.LIMIT -1)
(NOT \VMEM.FULL.STATE)))
(PROG ((RPTR (OR \LASTDIRTYSCANPTR \REALPAGETABLE))
(NUMDIRTY (OR \LASTDIRTYCNT 0))
(CNT \MAXDIRTYSCANCOUNT)
RP FP FLAGS)
[COND
((AND (NULL \LASTDIRTYSCANPTR)
(IGREATERP (IPLUS (add \DIRTYPAGECOUNTER 1)
\PAGEFAULTCOUNTER)
\UPDATECHAINFREQ)) (* Take this time to update the page
chain instead)
(RETURN (UNINTERRUPTABLY
(\MISCAPPLY* (FUNCTION \UPDATECHAIN)))]
(OR MINDIRTY (SETQ MINDIRTY 1))
LP [COND
[(EQ (SETQ RP (fetch (RPT NEXTRP) of RPTR))
\PAGETABLESTOPFLG) (* Hit end of chain.
Write out what we found if enough were
dirty)
(COND
((AND (IGEQ NUMDIRTY MINDIRTY)
(NEQ NUMDIRTY 0)
(SETQ RP \LASTDIRTYFOUND))
(GO GOTPAGE))
(T (SETQ \LASTDIRTYSCANPTR (SETQ \LASTDIRTYCNT (SETQ \LASTDIRTYFOUND NIL)))
[COND
((AND (NEQ NUMDIRTY 0)
(ILESSP \DIRTYSEEKMAX (LRSH MAX.SMALL.INTEGER 1)))
(* Failed because page not close
enough, so widen the tolerance)
(SETQ \DIRTYSEEKMAX (LLSH \DIRTYSEEKMAX 1]
(RETURN]
((fetch (RPT EMPTY) of (SETQ RPTR (fetch RPTRBASE of RP)))
(* Page is empty. Should never happen
if key is valid)
(RETURN))
((NOT (fetch (RPT LOCKED) of RPTR)) (* Don't bother writing out locked
pages, since they don't help us in our
swapping quest)
(SETQ FLAGS (\READFLAGS (fetch (RPT VP) of RPTR)))
(COND
((NOT (fetch (VMEMFLAGS DIRTY) of FLAGS))
(* Page not dirty; skip)
)
[(PROGN (SETQ FP (fetch (RPT FILEPAGE) of RPTR))
(IGREATERP (IABS (IDIFFERENCE (COND
((AND \VMEM.PURE.LIMIT (ILESSP FP
\VMEM.PURE.LIMIT
))
(* We'd have to write page to a new
place, not here)
(fetch (IFPAGE NActivePages)
of \InterfacePage))
(T FP))
\LASTACCESSEDVMEMPAGE))
\DIRTYSEEKMAX)) (* Page too far away, don't write it)
(COND
((fetch (VMEMFLAGS REFERENCED) of FLAGS)
(* but still count it)
(add NUMDIRTY 1]
((IGREATERP FP \LASTVMEMFILEPAGE) (* Can't write it)
)
((fetch (VMEMFLAGS REFERENCED) of FLAGS)(* Page dirty but referenced.
Note it, but keep looking for a better
one)
(COND
((EQ NUMDIRTY 0)
(SETQ \LASTDIRTYFOUND RP)))
(add NUMDIRTY 1))
(T (* Dirty, not referenced: do it)
(GO GOTPAGE]
(COND
((EQ (add CNT -1)
0) (* Scanned for long enough;
don't lock user out)
(SETQ \LASTDIRTYSCANPTR RPTR)
(SETQ \LASTDIRTYCNT NUMDIRTY)
(RETURN)))
(GO LP)
GOTPAGE
(UNINTERRUPTABLY
(SETQ \LASTDIRTYSCANPTR (SETQ RPTR (fetch RPTRBASE of RP)))
(* Keep traveling pointer)
(SETQ \LASTDIRTYCNT (SETQ \LASTDIRTYFOUND NIL))
(COND
((ILEQ (IABS (IDIFFERENCE (fetch (RPT FILEPAGE) of RPTR)
\LASTACCESSEDVMEMPAGE))
\DIRTYSEEKMAX) (* Could fail if swapping since the
selection has moved the disk arm too
far)
(\MISCAPPLY* (FUNCTION \WRITEDIRTYPAGE1)
RP RPTR)))
(SETQ \DIRTYSEEKMAX \MAXSHORTSEEK))
(RETURN T])
(\WRITEDIRTYPAGE1
[LAMBDA (RP RPTR) (* bvm: "13-Aug-85 16:41")
(* Write out buffer RP.
This fn is locked and called in the
misc context)
(COND
([AND (NOT (fetch (RPT LOCKED) of RPTR))
(fetch (VMEMFLAGS DIRTY) of (\READFLAGS (fetch (RPT VP) of RPTR]
(* Verify that the page is still a
candidate, so previous loop could be
interruptable)
(\FLUSHPAGE RP)
(COND
(\NEWVMEMPAGEADDED (\ASSURE.FPTOVP.PAGE])
(\COUNTREALPAGES
[LAMBDA (TYPE) (* bvm: "18-Dec-84 15:31")
(SELECTQ TYPE
((DIRTY REF)
[PROG [(FLAGBITS (COND
((EQ TYPE (QUOTE DIRTY))
\VMAP.DIRTY)
(T \VMAP.REF]
(RETURN (NPAGESMACRO (NEQ (LOGAND (\READFLAGS VP)
FLAGBITS)
0])
(LOCKED (NPAGESMACRO (fetch (RPT LOCKED) of RPTR)))
(OCCUPIED (NPAGESMACRO T))
(\ILLEGAL.ARG TYPE])
)
(DEFINEQ
(\DOCOMPRESSVMEM
[LAMBDA NIL (* bvm: " 7-Apr-84 17:53")
(* * Called underneath \DOFLUSHVM to write the pages above the high water mark
back to the places vacated below that mark)
(PROG ((EMPTYFP (DLFPFROMRP \RP.GCTABLE))
(LASTFP (fetch NActivePages of \InterfacePage))
(OLDVIW \VMEM.INHIBIT.WRITE)
VP)
[COND
((NULL OLDVIW) (* Encourage \SELECTREALPAGE to select
only "old" file pages for
displacement, so that we don't
needlessly write the same page twice)
(SETQ \VMEM.INHIBIT.WRITE (QUOTE NEW]
LP (COND
((IGEQ EMPTYFP LASTFP)
(SETQ \VMEM.INHIBIT.WRITE OLDVIW)
(RETURN)))
[COND
((EQ (\GETBASE \FPTOVP EMPTYFP)
\NO.VMEM.PAGE)
(while (EQ (SETQ VP (\GETBASE \FPTOVP LASTFP))
\NO.VMEM.PAGE) do (SETQ LASTFP (SUB1 LASTFP)))
(\MOVEVMEMFILEPAGE VP LASTFP EMPTYFP)
(replace NActivePages of \InterfacePage with (SETQ LASTFP (SUB1 LASTFP]
(add EMPTYFP 1)
(GO LP])
(VMEM.PURE.STATE
[LAMBDA FLG (* bvm: " 7-Apr-84 16:59")
(PROG1 (NOT (NULL \VMEM.PURE.LIMIT))
(COND
((IGREATERP FLG 0)
(* Set \VMEM.PURE.LIMIT appropriately. If turning on, and it wasn't on before,
set it to -1 so that it takes effect only at the next FLUSHVM)
(SETQ \VMEM.PURE.LIMIT (AND (ARG FLG 1)
(OR \VMEM.PURE.LIMIT (SETQ \VMEM.PURE.LIMIT -1])
)
(DEFINEQ
(32MBADDRESSABLE
[LAMBDA NIL (* mpl "20-Jun-85 11:08")
(SELECTC \MACHINETYPE
(\DORADO T)
(\DOLPHIN NIL)
(\DAYBREAK T)
(NEQ 0 (fetch (IFPAGE DL24BitAddressable) of \InterfacePage])
(\SET.VMEM.FULL.STATE
[LAMBDA NIL (* bvm: "13-Feb-85 20:12")
(* We are running out of vmem, try to
extend file. Do this at next
convenient time)
(COND
((NOT \VMEM.FULL.STATE) (* Get an interrupt to handle this)
(replace VMEMFULL of \INTERRUPTSTATE with T)
(SETQ \PENDINGINTERRUPT T)))
(SETQ \VMEM.FULL.STATE (COND
((ILESSP (fetch (IFPAGE NActivePages) of \InterfacePage)
\LASTVMEMFILEPAGE) (* Not completely full, allow normal
things to happen)
0)
((.VMEM.CONSISTENTP.)
T)
(T (QUOTE DIRTY])
(\DOVMEMFULLINTERRUPT
[LAMBDA NIL (* bvm: "15-Feb-85 00:08")
(* * Called while interruptable when vmem is full or nearly so.
Tries to extend vmem file, or gives error if it can't)
(COND
(\EXTENDINGVMEMFILE
(* Another interrupt happened while we are extending file.
Don't try to do this one twice, but repost the interrupt in the hopes that it
will happen after vmem extension is finished)
(SETQ \PENDINGINTERRUPT T))
(T (RESETVARS ((\EXTENDINGVMEMFILE T))
(COND
((NULL (SELECTC \MACHINETYPE
((LIST \DOLPHIN \DORADO)
(\M44EXTENDVMEMFILE (IPLUS (IMAX \LASTVMEMFILEPAGE
(fetch (IFPAGE NActivePages)
of \InterfacePage))
\GUARDVMEMFULL 1)))
T)) (* Disk declines to do it now, try
later)
(SETQ \PENDINGINTERRUPT T))
((IGREATERP (IDIFFERENCE \LASTVMEMFILEPAGE \GUARDVMEMFULL)
(fetch (IFPAGE NActivePages) of \InterfacePage))
(SETQ \VMEM.FULL.STATE NIL) (* All is okay, dismiss alarm.
Can't disable interrupt until now to
assure consistent value for
\VMEM.FULL.STATE)
(replace VMEMFULL of \INTERRUPTSTATE with NIL))
(T (PROG ((HELPFLAG (QUOTE BREAK!)))
(replace VMEMFULL of \INTERRUPTSTATE with NIL)
(* Very slight chance of losing the
break if ↑E right here.
Don't know how to fix this)
(ERROR (CONCAT "Your virtual memory backing file is "
(COND
((IGEQ (fetch (IFPAGE NActivePages) of
\InterfacePage
)
\LASTVMEMFILEPAGE)
"complete")
(T "near"))
"ly full.")
"Save your work & reload a.s.a.p."])
(\FLUSHVMOK?
[LAMBDA (TYPE NOERROR) (* bvm: " 7-Sep-85 10:48")
(* * Called before any attempt to do a \FLUSHVM to make sure it's ok)
(LET [(MSG (COND
((SELECTQ \VMEM.FULL.STATE
((T DIRTY)
T)
NIL)
"-- virtual memory backing file too small")
((AND \VMEM.PURE.LIMIT (NEQ \VMEM.PURE.LIMIT -1)
(NOT VMEM.COMPRESS.FLG))
" while VMEM.PURE.STATE is on."]
(COND
((NOT MSG)
T)
(T [COND
((NOT NOERROR)
(ERROR [CONCAT "Can't " (OR TYPE (SETQ TYPE (QUOTE LOGOUT]
MSG
(COND
((EQ TYPE (QUOTE LOGOUT))
"
You may (LOGOUT T), which quits without saving state.")
(T ""]
NIL])
)
(RPAQ? \UPDATECHAINFREQ 100)
(RPAQ? \PAGEFAULTCOUNTER 0)
(RPAQ? \DIRTYPAGECOUNTER 0)
(RPAQ? \DIRTYPAGEHINT 0)
(RPAQ? \LASTACCESSEDVMEMPAGE 0)
(RPAQ? \MAXSHORTSEEK 1000)
(RPAQ? \MINSHORTSEEK 20)
(RPAQ? \MAXCLEANPROBES 20)
(RPAQ? \VMEM.INHIBIT.WRITE )
(RPAQ? \VMEM.PURE.LIMIT )
(RPAQ? \VMEM.FULL.STATE )
(RPAQ? \GUARDVMEMFULL 500)
(RPAQ? VMEM.COMPRESS.FLG )
(RPAQ? \DOFAULTINIT 0)
(RPAQ? \VMEMACCESSFN )
(RPAQ? \SYSTEMCACHEVARS )
(RPAQ? \MAXSWAPBUFFERS 1)
(RPAQ? \EXTENDINGVMEMFILE )
(RPAQ? \MaxScreenPage 0)
(RPAQ? \NEWVMEMPAGEADDED )
(RPAQ? \LASTDIRTYCNT )
(RPAQ? \LASTDIRTYFOUND )
(RPAQ? \LASTDIRTYSCANPTR )
(RPAQ? \DIRTYSEEKMAX 50)
(* Errors)
(DEFINEQ
(\MP.ERROR
[LAMBDA (CODE STRING ARG1 ARG2) (* mpl "20-Jun-85 11:09")
(COND
((OR (EQ \MACHINETYPE \DANDELION)
(EQ \MACHINETYPE \DAYBREAK))
((OPCODES RAID)
CODE))
(T (RAID STRING ARG1 ARG2])
)
(* Debugging)
(DEFINEQ
(\ACTONVMEMFILE
[LAMBDA (FILEPAGE BUFFER NPAGES WRITEFLAG) (* MPL "22-Jun-85 20:18")
(COND
((EQ \MACHINETYPE \DANDELION)
(\DL.ACTONVMEMFILE FILEPAGE BUFFER NPAGES WRITEFLAG))
((EQ \MACHINETYPE \DAYBREAK)
(\DOVE.ACTONVMEMFILE FILEPAGE BUFFER NPAGES WRITEFLAG))
(T (\M44ACTONVMEMFILE FILEPAGE BUFFER NPAGES WRITEFLAG])
(\SHOWPAGETABLE
[LAMBDA (MODE FILE) (* bvm: "19-Feb-85 14:47")
(RESETLST (RESETSAVE (OUTPUT FILE))
(RESETSAVE (RADIX 8))
(PROG ((RPTR \REALPAGETABLE)
(RP 0)
FLAGS VP STATE FIRSTONE LASTONE)
(printout NIL " RP VP FilePage Status" T)
(until (SELECTQ MODE
(CHAIN (EQ (SETQ RP (fetch (RPT NEXTRP) of RPTR))
\PAGETABLESTOPFLG))
(NIL (add RP 1)
(IGEQ RP \RPTSIZE))
(\ILLEGAL.ARG MODE))
do (SETQ RPTR (fetch RPTRBASE of RP))
(SETQ VP (fetch (RPT VP) of RPTR))
(COND
((AND (NULL MODE)
(EQ VP STATE))
(SETQ LASTONE RP))
(T (COND
(LASTONE (printout NIL "ditto thru " LASTONE T)
(SETQ LASTONE NIL)))
(SETQ FIRSTONE RP)
(SETQ STATE VP)
(printout NIL .I7.8 (RPFROMRPT RP))
[COND
((fetch (RPT EMPTY) of RPTR)
(PRIN1 " Empty"))
((NOT (fetch (RPT OCCUPIED) of RPTR))
(PRIN1 " Unavailable"))
(T (printout NIL .I8.8 VP %, # (\PRINTVP VP)
28 .I6.8 (fetch (RPT FILEPAGE) of RPTR)
%,,)
(COND
((fetch (RPT LOCKED) of RPTR)
(COND
((NOT (\LOCKEDPAGEP VP))
(* not permanently locked)
(PRIN1 "Temp")))
(PRIN1 "Locked ")))
(UNLESSRDSYS (PROGN (COND
((fetch (VMEMFLAGS REFERENCED)
of (SETQ FLAGS (\READFLAGS VP)))
(PRIN1 "Ref ")))
(COND
((fetch (VMEMFLAGS DIRTY) of FLAGS)
(PRIN1 "Dirty"]
(TERPRI])
(CHECKPAGEMAP
[LAMBDA NIL (* bvm: "10-Dec-84 12:40")
(RESETFORM (RADIX 8)
(PROG ((NUMOCCUPIED 0)
(NUMLOCKED 0)
(CHAINOCCUPIED 0)
(CHAINLOCKED 0)
RPTR FPBASE FP VP RP)
(CHECKFPTOVP)
[for RPTINDEX from 1 to (SUB1 \RPTSIZE) when (fetch (RPT OCCUPIED)
of (SETQ RPTR (fetch RPTRBASE
of RPTINDEX)))
do (add NUMOCCUPIED 1)
(SETQ VP (fetch (RPT VP) of RPTR))
(SETQ FP (fetch (RPT FILEPAGE) of RPTR))
(COND
((CHECKFPTOVP1 FP VP RPTINDEX))
([NEQ VP (fetch FPVIRTUALPAGE of (SETQ FPBASE (\ADDBASE \FPTOVP FP]
(printout T "RPT for RP " (RPFROMRPT RPTINDEX)
" says VP ")
(\PRINTVP VP T)
(printout T " lives in FP " FP "; but FP Map says that FP contains ")
(\PRINTVP (fetch FPVIRTUALPAGE of FPBASE)
T)
(printout T T))
((\LOCKEDPAGEP VP)
(add NUMLOCKED 1)
(COND
((NOT (fetch (RPT LOCKED) of RPTR))
(printout T "VP " VP ", living in RP " (RPFROMRPT RPTINDEX)
" should be locked but isn't." T))
((IGREATERP FP (DLRPFROMFP (fetch (IFPAGE LastLockedFilePage)
of \InterfacePage)))
(printout T "VP " VP " is locked, but living in FP " FP
", which is not in the locked page area" T]
(PROGN (SETQ RPTR \REALPAGETABLE) (* Check pagetable chain)
[while (NEQ (SETQ RP (fetch (RPT NEXTRP) of RPTR))
\PAGETABLESTOPFLG) when (fetch (RPT OCCUPIED)
of (SETQ RPTR (fetch RPTRBASE
of RP)))
do (add CHAINOCCUPIED 1)
(COND
((fetch (RPT LOCKED) of RPTR)
(add CHAINLOCKED 1]
(COND
((ILESSP CHAINOCCUPIED NUMOCCUPIED)
(printout T NUMOCCUPIED " occupied pages, but only " CHAINOCCUPIED
" are on page chain. " NUMLOCKED
" pages are permanently locked; " CHAINLOCKED
" pages on chain are locked somehow." T])
(CHECKFPTOVP
[LAMBDA NIL (* bvm: "10-Dec-84 12:39")
(for FP from 1 to (fetch NActivePages of \InterfacePage) as (FPBASE ← (\ADDBASE \FPTOVP 1))
by (\ADDBASE FPBASE 1) when (fetch FPOCCUPIED of FPBASE)
do (CHECKFPTOVP1 FP (fetch FPVIRTUALPAGE of FPBASE])
(CHECKFPTOVP1
[LAMBDA (FP VP RPTINDEX) (* bvm: "10-Dec-84 12:36")
(PROG ((FP2 (\LOOKUPPAGEMAP VP)))
(RETURN (COND
((NEQ FP2 FP)
(COND
((UNLESSRDSYS RPTINDEX)
(printout T "RPT for RP " (RPFROMRPT RPTINDEX)))
(T (printout T "FP map")))
(printout T " says FP " FP " contains VP ")
(\PRINTVP VP T)
(printout T "; but PageMap says that page is in FP " FP2 T)
T])
(\PRINTFPTOVP
[LAMBDA (BASE NWORDS STREAM) (* bvm: "19-Feb-85 13:10")
(SETQ STREAM (GETSTREAM STREAM (QUOTE OUTPUT)))
(OR BASE (SETQ BASE \FPTOVP))
(OR NWORDS (SETQ NWORDS (fetch (IFPAGE NActivePages) of \InterfacePage)))
(RESETFORM (RADIX 8)
(PROG ((LASTVP -2)
(NEXTFP 0)
FIRSTFP FIRSTVP NEXTVP LOCKEDP NEXTLOCKED)
(while (IGEQ NWORDS 0) do (add NEXTFP 1)
[COND
((EQ NWORDS 0)
(SETQ NEXTVP -1))
((NEQ (SETQ NEXTVP (\GETBASE (SETQ BASE
(\ADDBASE BASE 1))
0))
\NO.VMEM.PAGE)
(SETQ NEXTLOCKED (\LOCKEDPAGEP NEXTVP]
[COND
([COND
((EQ NEXTVP \NO.VMEM.PAGE)
(NEQ LASTVP \NO.VMEM.PAGE))
(T (OR (NEQ NEXTVP (ADD1 LASTVP))
(NEQ NEXTLOCKED LOCKEDP]
[COND
((IGEQ LASTVP 0)
(COND
(FIRSTFP (printout STREAM FIRSTFP "-")))
(printout STREAM (SUB1 NEXTFP)
12)
(COND
((EQ LASTVP \NO.VMEM.PAGE)
(printout STREAM "empty"))
(T (COND
(FIRSTFP (\PRINTVP FIRSTVP STREAM)
(PRIN1 "-" STREAM)))
(\PRINTVP LASTVP STREAM)
(COND
(LOCKEDP (PRIN1 (QUOTE *)
STREAM]
(SETQ FIRSTFP)
(TERPRI STREAM)
(SETQ FIRSTVP NEXTVP))
(T (* in a run)
(OR FIRSTFP (SETQ FIRSTFP (SUB1 NEXTFP]
(SETQ LASTVP NEXTVP)
(SETQ LOCKEDP NEXTLOCKED)
(add NWORDS -1])
(\PRINTVP
[LAMBDA (VP STREAM) (* bvm: "28-MAR-83 12:40")
(printout STREAM "{" (LRSH VP 8)
","
(LOGAND VP 255)
"}"])
)
(DECLARE: EVAL@COMPILE DONTCOPY
(DECLARE: EVAL@COMPILE
(PUTPROPS \ACTONVMEMFILE MACRO ((X . Y)
(SPREADAPPLY* \VMEMACCESSFN X . Y)))
(PUTPROPS .VMEM.CONSISTENTP. MACRO (NIL (EQ (fetch (IFPAGE Key)
of \InterfacePage)
\IFPValidKey)))
[PUTPROPS .LOCKABLERP. MACRO ((RP)
(* It's okay to lock a vp into this RP)
(OR (NEQ (FOLDLO RP PAGESPERSEGMENT)
(FOLDLO \RP.STACK PAGESPERSEGMENT))
(NOT (OR (EQ \MACHINETYPE \DANDELION)
(EQ \MACHINETYPE \DAYBREAK]
)
(* Virtual page flags)
(DECLARE: EVAL@COMPILE
(RPAQQ \VMAP.DIRTY 10000Q)
(RPAQQ \VMAP.CLEAN 0)
(RPAQQ \VMAP.REF 100000Q)
(RPAQQ \VMAP.VACANT 30000Q)
(RPAQQ \VMAP.FLAGS 170000Q)
(RPAQQ \VMAP.NOTFLAGS 7777Q)
(CONSTANTS \VMAP.DIRTY \VMAP.CLEAN \VMAP.REF \VMAP.VACANT \VMAP.FLAGS \VMAP.NOTFLAGS)
)
[DECLARE: EVAL@COMPILE
(ACCESSFNS VMEMFLAGS ((VACANT (EQ (LOGAND DATUM \VMAP.VACANT)
\VMAP.VACANT))
(DIRTY (NEQ (LOGAND DATUM \VMAP.DIRTY)
0))
(REFERENCED (NEQ (LOGAND DATUM \VMAP.REF)
0))))
]
(DECLARE: EVAL@COMPILE
(PUTPROPS LOGNOT16 MACRO ((X)
(LOGXOR X 177777Q)))
)
(* RPT constants)
(DECLARE: EVAL@COMPILE
(RPAQQ \RPT.EMPTY 177776Q)
(RPAQQ \RPT.UNAVAILABLE 177777Q)
(RPAQQ \PAGETABLESTOPFLG 0)
(RPAQQ \RPTENTRYLENGTH 3)
(CONSTANTS \RPT.EMPTY \RPT.UNAVAILABLE \PAGETABLESTOPFLG \RPTENTRYLENGTH)
)
[DECLARE: EVAL@COMPILE
(BLOCKRECORD RPT ((LOCKED FLAG)
(NEXTRP BITS 17Q) (* rp of next entry in page chain)
(VP WORD) (* Virtual page number occupying this
real page)
(FILEPAGE WORD) (* Page in Lisp.VirtualMem)
)
(BLOCKRECORD RPT ((NIL BITS 20Q)
(VPSEG BYTE)
(VPPAGEINSEG BYTE)))
[ACCESSFNS RPT ([EMPTY (EQ (fetch (RPT VP)
of DATUM)
\RPT.EMPTY)
(COND
(NEWVALUE (replace (RPT VP)
of DATUM with \RPT.EMPTY))
(T (ERROR "Invalid replace of RPT.EMPTY" DATUM]
[UNAVAILABLE (EQ (fetch (RPT VP)
of DATUM)
\RPT.UNAVAILABLE)
(COND
(NEWVALUE (replace (RPT VP)
of DATUM with \RPT.UNAVAILABLE))
(T (ERROR "Invalid replace of RPT.UNAVAILABLE" DATUM]
(OCCUPIED (ILESSP (fetch (RPT VP)
of DATUM)
\RPT.EMPTY])
(ACCESSFNS RPT1 (RPTRBASE (\ADDBASE \REALPAGETABLE (TIMES3 DATUM)))
(* Given a RP, RPTRBASE produces a
pointer to its entry in the real page
table)
)
]
(DECLARE: EVAL@COMPILE
(PUTPROPS RPFROMRPT MACRO ((RPTINDEX)
(IPLUS RPTINDEX \RPOFFSET)))
(PUTPROPS RPTFROMRP MACRO ((RP)
(IDIFFERENCE RP \RPOFFSET)))
[PUTPROPS NPAGESMACRO MACRO ((FORM)
(PROG ((RESULT 0)
(CNTR \RPTSIZE)
(RPTR \REALPAGETABLE)
VP)
(* Note order of loop: \REALPAGETABLE is dummy entry, so don't
look at it, start at next entry)
LP
(COND ((NEQ (SETQ CNTR (SUB1 CNTR))
0)
(SETQ RPTR (\ADDBASE RPTR \RPTENTRYLENGTH))
(COND ((AND (fetch (RPT OCCUPIED)
of RPTR)
(PROGN (SETQ VP (fetch (RPT VP)
of RPTR))
FORM))
(add RESULT 1)))
(GO LP)))
(RETURN RESULT]
)
(* Virtual to file pagemap)
(* FOLLOWING DEFINITIONS EXPORTED)
(DECLARE: EVAL@COMPILE
(RPAQQ \MAXFILEPAGE 177776Q)
(CONSTANTS \MAXFILEPAGE)
)
(* END EXPORTED DEFINITIONS)
(DECLARE: EVAL@COMPILE
(RPAQQ \EMPTYPMTENTRY 177777Q)
(CONSTANTS \EMPTYPMTENTRY)
)
[DECLARE: EVAL@COMPILE
(ACCESSFNS VP ((PRIMARYKEY (LRSH DATUM 5))
(SECONDARYKEY (LOGAND DATUM 37Q))
(INVALID (PROGN NIL))))
]
(DECLARE: EVAL@COMPILE
[PUTPROPS .PAGEMAPBASE. MACRO (OPENLAMBDA (VPAGE)
(\ADDBASE \PAGEMAP (IPLUS (\GETBASE \PageMapTBL
(fetch (VP PRIMARYKEY)
of VPAGE))
(fetch (VP SECONDARYKEY)
of VPAGE]
)
(* FP to VP stuff)
[DECLARE: EVAL@COMPILE
(BLOCKRECORD FPTOVP ((FPVIRTUALPAGE WORD))
[ACCESSFNS FPTOVP ((FPOCCUPIED (NEQ (\GETBASE DATUM 0)
\NO.VMEM.PAGE])
]
(DECLARE: EVAL@COMPILE
(RPAQQ \NO.VMEM.PAGE 177777Q)
(CONSTANTS \NO.VMEM.PAGE)
)
(DECLARE: EVAL@COMPILE
(PUTPROPS DLRPFROMFP MACRO ((FP)
(ADD1 FP)))
(PUTPROPS DLFPFROMRP MACRO ((RP)
(SUB1 RP)))
)
(PUTPROPS \TOUCHPAGE DOPVAL (1 GETBASE.N 0))
(PUTPROPS TIMES3 DOPVAL (1 COPY LLSH1 IPLUS2))
(* Locked page table)
(DECLARE: EVAL@COMPILE
[PUTPROPS .LOCKEDVPBASE. MACRO ((VP)
(\ADDBASE \LOCKEDPAGETABLE (FOLDLO VP BITSPERWORD]
[PUTPROPS .LOCKEDVPMASK. MACRO ((VP)
(LLSH 1 (IMOD VP BITSPERWORD]
)
(DECLARE: EVAL@COMPILE
(RPAQQ \MAXDIRTYSCANCOUNT 144Q)
(RPAQQ \MINVMEMSPAREPAGES 144Q)
(RPAQQ \DLBUFFERPAGES 20Q)
(CONSTANTS \MAXDIRTYSCANCOUNT \MINVMEMSPAREPAGES \DLBUFFERPAGES)
)
(DECLARE: EVAL@COMPILE
(RPAQQ 2MBPAGES 10000Q)
(CONSTANTS 2MBPAGES)
)
(DECLARE: DOEVAL@COMPILE DONTCOPY
(GLOBALVARS \UPDATECHAINFREQ \REALPAGETABLE \RPTLAST \RPOFFSET \RPTSIZE \LOCKEDPAGETABLE \EMBUFBASE
\EMBUFVP \EMBUFRP \PAGEFAULTCOUNTER \LASTDIRTYCNT \LASTDIRTYFOUND \LASTDIRTYSCANPTR
\MACHINETYPE \LASTACCESSEDVMEMPAGE \MAXSHORTSEEK \MAXCLEANPROBES \MINSHORTSEEK \DIRTYSEEKMAX
\DIRTYPAGECOUNTER \DIRTYPAGEHINT \VMEM.INHIBIT.WRITE \VMEM.PURE.LIMIT \VMEM.FULL.STATE
\GUARDVMEMFULL VMEM.COMPRESS.FLG \KBDSTACKBASE \MISCSTACKBASE \DOFAULTINIT \FPTOVP
\VMEMACCESSFN \SYSTEMCACHEVARS \LASTVMEMFILEPAGE \EXTENDINGVMEMFILE \MaxScreenPage
\NEWVMEMPAGEADDED)
)
(DECLARE: DOEVAL@COMPILE DONTCOPY
(GLOBALVARS \#SWAPBUFFERS \#EMUBUFFERS \#DISKBUFFERS \MAXSWAPBUFFERS \EMUSWAPBUFFERS \EMUBUFFERS
\TELERAIDBUFFER \EMUDISKBUFFERS \EMUDISKBUFEND)
)
(DECLARE: EVAL@COMPILE
(PUTPROPS RWMufMan DMACRO ((X)
(* Note that this is the MISC1 opcode with 11Q as the alpha byte.)
((OPCODES 170Q 11Q)
X)))
)
(DECLARE: EVAL@COMPILE
(RPAQQ DOLOCKCHECKS NIL)
(CONSTANTS (DOLOCKCHECKS NIL))
)
)
(* * MAKEINIT stuff)
(DEFINEQ
(ADDPME
[LAMBDA (VP NEWPAGEOK) (* bvm: " 6-Dec-84 14:07")
(* add an entry for VP to the PAGEMAP.
Called only under MAKEINIT)
(PROG (PX PMP LOCKBASE)
[COND
((IEQ (SETQ PMP (\GETBASE \PageMapTBL (fetch (VP PRIMARYKEY) of VP)))
\EmptyPMTEntry) (* empty entries in the PageMapTBL
have 177777q as their value)
(COND
((EVENP NEXTPM WORDSPERPAGE) (* must add a new page map page)
(SETQ PX (\ADDBASE \PAGEMAP NEXTPM))
(OR NEWPAGEOK (IGREATERP (PAGELOC PX)
VP)
(HELP "page map needs new page after page map written out"))
(\NEWPAGE PX NIL T)))
(\PUTBASE \PageMapTBL (fetch (VP PRIMARYKEY) of VP)
(SETQ PMP NEXTPM))
(SETQ NEXTPM (IPLUS NEXTPM \PMblockSize]
(SETQ PX (IPLUS PMP (fetch (VP SECONDARYKEY) of VP)))
(COND
((NEQ (\GETBASE \PAGEMAP PX)
0)
(HELP "page already in pagemap" VP))
(T (\PUTBASE \PAGEMAP PX NEXTVMEM)
[COND
((LOCKEDPAGEP VP) (* Set lock bit in locked page table)
(\PUTBASE (SETQ LOCKBASE (.LOCKEDVPBASE. VP))
0
(LOGOR (.LOCKEDVPMASK. VP)
(\GETBASE LOCKBASE 0]
(SETQ NEXTVMEM (ADD1 NEXTVMEM])
(CHECKIFPAGE
[LAMBDA NIL (* mjs "19-Jul-84 13:24")
(CHECKIF Key EQUAL \IFPValidKey "Interface page key"])
(DUMPINITPAGES
[LAMBDA (CODEFIRSTPAGE CODENEXTPAGE VERSIONS) (* bvm: "14-Jan-85 12:51")
(* called only under MAKEINIT)
(ADDPME (PAGELOC \InterfacePage)
T) (* THE INTERFACE PAGE MUST BE THE
FIRST PAGE)
(for I from CODEFIRSTPAGE to (SUB1 CODENEXTPAGE) do (* add the pagemap entries for the
pages which were written directly to
the file)
(ADDPME I T))
(MAPPAGES 0 (ADD1 \MAXVMPAGE)
(FUNCTION MAKEROOMFORPME))
(MAPPAGES 0 (ADD1 \MAXVMPAGE)
(FUNCTION ADDPME))
(PROGN (* set interface page locations -
stack pointers already set up IN
SETUPSTACK)
(replace (IFPAGE NxtPMAddr) of \InterfacePage with NEXTPM)
(replace (IFPAGE NActivePages) of \InterfacePage with (SUB1 NEXTVMEM))
(replace (IFPAGE NDirtyPages) of \InterfacePage with (SUB1 NEXTVMEM))
(replace (IFPAGE filePnPMP0) of \InterfacePage with (\GETBASE \PAGEMAP 0))
(replace (IFPAGE filePnPMT0) of \InterfacePage with (\GETBASE (.PAGEMAPBASE. (PAGELOC
\PageMapTBL)
)
0))
[COND
(VERSIONS (replace (IFPAGE LVersion) of \InterfacePage with (CAR VERSIONS))
(replace (IFPAGE MinBVersion) of \InterfacePage with (CADDR VERSIONS))
(replace (IFPAGE MinRVersion) of \InterfacePage with (CADR VERSIONS]
(replace (IFPAGE Key) of \InterfacePage with \IFPValidKey))
(MAPPAGES 0 (ADD1 \MAXVMPAGE)
(FUNCTION DUMPVP))
(ALLOCAL (PROG ((FILE (OUTPUT)))
[COND
((NOT (RANDACCESSP FILE)) (* SYSOUT file is sequential;
have to get it random access for this)
(OUTPUT (SETQ FILE (OPENFILE (CLOSEF FILE)
(QUOTE BOTH]
(SETFILEPTR FILE MKI.Page0Byte)))
(DUMPVP (PAGELOC \InterfacePage])
(MAKEROOMFORPME
[LAMBDA (VP) (* bvm: "29-MAR-83 17:11")
(* make sure that the pagemap-page for
page VP exists; we later will want to
add it to the pagemap)
(COND
((IEQ (\GETBASE \PageMapTBL (fetch (VP PRIMARYKEY) of VP))
\EmptyPMTEntry) (* empty entries in the PageMapTBL
have 177777q as their value)
(COND
((EVENP NEXTPM WORDSPERPAGE) (* must add a new page map page)
(\NEWPAGE (\ADDBASE \PAGEMAP NEXTPM)
NIL T)))
(\PUTBASE \PageMapTBL (fetch (VP PRIMARYKEY) of VP)
NEXTPM)
(SETQ NEXTPM (IPLUS NEXTPM \PMblockSize])
(MAPPAGES
[LAMBDA (BOT TOP FN) (* lmm "26-MAR-81 12:23")
(PROG ((VP BOT)
(IVP (PAGELOC \InterfacePage)))
LP (COND
((AND (SETQ VP (MKI.NEXTPAGE VP))
(IGREATERP TOP VP))
(COND
((NOT (IEQ VP IVP))
(APPLY* FN VP)))
(SETQ VP (ADD1 VP))
(GO LP])
(READPAGEMAP
[LAMBDA NIL (* bvm: "10-Dec-84 21:54")
(* called only under READSYS --
reads in pagemap so that SETVMPTR can
work)
(PROG (D)
(LOCAL (MAPVMPAGE (fetch (POINTER PAGE#) of \InterfacePage)
1)) (* Install interface page by magic)
(* PROGN (SETQ FPSTART (fetch (IFPAGE LastDominoFilePage) of \InterfacePage))
(SETQ NPAGES (fetch (IFPAGE NActivePages) of \InterfacePage))
(* Note: have to do these fetches before the SETFILEPTR since they indirectly
do SETFILEPTR themselves) (SETFILEPTR VMEMFILE
(IPLUS (UNFOLD (SUB1 (fetch (IFPAGE FPTOVPStart) of \InterfacePage))
BYTESPERPAGE) (UNFOLD FPSTART BYTESPERWORD)))
(for I from FPSTART to NPAGES bind VP when
(NEQ (SETQ VP (VBIN2)) \NO.VMEM.PAGE) do
(* Read in all of FPTOVP) (MAPVMPAGE VP (SUB1 I))))
[LOCAL (MAPVMPAGE (PAGELOC \PAGEMAP)
(SUB1 (fetch (IFPAGE filePnPMP0) of \InterfacePage]
(* map in first page of secondary page
map, which is where all the secondary
map pages themselves live)
(LOCAL (SETVMPTR \PAGEMAP))
(for I from 0 to (SUB1 (FOLDHI PAGESPERSEGMENT \PMblockSize)) as VP
from (PAGELOC \PAGEMAP) by \PMblockSize do (* Have to read all the addresses of
secondary map pages themselves before
we can read their contents)
(READPAGEMAPBLOCK VP))
(for J from 0 to (SUB1 \NumPMTpages) as FP from (SUB1 (fetch (IFPAGE filePnPMT0)
of \InterfacePage))
do (* read in all the primary map table
pages)
(LOCAL (MAPVMPAGE (IPLUS (PAGELOC \PageMapTBL)
J)
FP)))
(for I from 0 to (SUB1 (UNFOLD \NumPMTpages WORDSPERPAGE))
do (COND
((IEQ (SETQ D (GETBASE \PageMapTBL I))
\EmptyPMTEntry))
(T (LOCAL (SETVMPTR (ADDBASE \PAGEMAP D)))
(READPAGEMAPBLOCK (UNFOLD I \PMblockSize])
(READPAGEMAPBLOCK
[LAMBDA (VP) (* lmm " 4-MAY-82 21:12")
(PROG ((B VP)
P)
(FRPTQ \PMblockSize [COND
((NEQ (SETQ P (VBIN2))
0)
(LOCAL (MAPVMPAGE B (SUB1 P]
(SETQ B (ADD1 B])
(SETUPPAGEMAP
[LAMBDA NIL (* bvm: " 8-Dec-84 14:52")
(* called only from MAKEINIT to
initialize the page map)
(PROG NIL (* set up page map)
(\NEWPAGE \PAGEMAP NIL T)
(CREATEPAGES \PageMapTBL \NumPMTpages NIL T) (* init PageMapTBL pages to 177777q)
(for I from 0 to (SUB1 (UNFOLD \NumPMTpages WORDSPERPAGE))
do (\PUTBASE \PageMapTBL I \EmptyPMTEntry))
(SETQ NEXTPM 0)
(for I from 0 to (SUB1 (fetch (VP PRIMARYKEY) of \NumPageMapPages))
bind (PAGEMAPKEY ← (fetch (VP PRIMARYKEY) of (PAGELOC \PAGEMAP)))
do
(* Assign pagemap pages to cover all pagemap pages, so that \DONEWPAGE can
guarantee that when it needs to allocate a new pagemap page, that the pagemap
page for the new page already exists)
(\PUTBASE \PageMapTBL (IPLUS PAGEMAPKEY I)
NEXTPM)
(SETQ NEXTPM (IPLUS NEXTPM \PMblockSize)))
(SETQ NEXTVMEM \FirstVmemBlock) (* add entry for InterfacePage which
must be on FirstVMemBlock)
(CREATEPAGES \LOCKEDPAGETABLE \NumLPTPages NIL T])
)
(DECLARE: DONTCOPY
(DECLARE: EVAL@COMPILE
[PUTPROPS CHECKIF MACRO ((FLD COMPARISON VALUE STR)
(COND ((NOT (COMPARISON VALUE (fetch (IFPAGE FLD)
of \InterfacePage)))
(printout T "Warning: " STR "= " (PROGN VALUE)
", but \InterfacePage says "
(fetch (IFPAGE FLD)
of \InterfacePage)
T]
)
(ADDTOVAR INEWCOMS (FNS DUMPINITPAGES)
(VARS INITCONSTANTS)
(FNS SETUPPAGEMAP ADDPME MAKEROOMFORPME MAPPAGES))
(ADDTOVAR RDCOMS (FNS READPAGEMAP READPAGEMAPBLOCK CHECKIFPAGE \LOCKEDPAGEP \LOOKUPPAGEMAP
CHECKPAGEMAP CHECKFPTOVP CHECKFPTOVP1 \SHOWPAGETABLE \PRINTFPTOVP))
(ADDTOVAR EXPANDMACROFNS CHECKIF .LOCKEDVPBASE. .LOCKEDVPMASK. .PAGEMAPBASE.)
(ADDTOVAR MKI.SUBFNS (\NEWPAGE . MKI.NEWPAGE)
(\LOCKPAGES . MKI.LOCKPAGES))
(ADDTOVAR RD.SUBFNS (\NEWPAGE . VNEWPAGE)
(\LOCKPAGES . VLOCKPAGES))
(ADDTOVAR RDPTRS (\REALPAGETABLE))
(ADDTOVAR RDVALS (\RPTSIZE))
EVAL@COMPILE
(ADDTOVAR DONTCOMPILEFNS DUMPINITPAGES SETUPPAGEMAP ADDPME MAKEROOMFORPME MAPPAGES READPAGEMAP
READPAGEMAPBLOCK CHECKIFPAGE)
)
(DEFINEQ
(\LOCKFN
[LAMBDA (FN) (* bvm: "22-NOV-82 17:39")
[\LOCKCELL (SETQ FN (fetch (LITATOM DEFINITIONCELL) of (EVQ FN]
(COND
((fetch (DEFINITIONCELL CCODEP) of FN)
(\LOCKCODE (fetch (DEFINITIONCELL DEFPOINTER) of FN])
(\LOCKCODE
[LAMBDA (CODEBLOCK) (* rmk: "15-Aug-84 13:35")
(\LOCKWORDS CODEBLOCK (UNFOLD (\#BLOCKDATACELLS CODEBLOCK)
WORDSPERCELL])
(\LOCKVAR
[LAMBDA (VAR) (* lmm " 5-APR-82 00:43")
(\LOCKCELL (fetch (LITATOM VCELL) of (EVQ VAR])
(\LOCKCELL
[LAMBDA (X NPGS) (* bvm: "22-NOV-82 17:54")
(\LOCKPAGES (PAGEBASE X)
(OR NPGS 1])
(\LOCKWORDS
[LAMBDA (BASE NWORDS) (* bvm: "22-NOV-82 17:35")
(\LOCKPAGES (PAGEBASE BASE)
(COND
(NWORDS (FOLDHI (IPLUS (fetch (POINTER WORDINPAGE) of BASE)
NWORDS)
WORDSPERPAGE))
(T 1])
)
(DECLARE: DONTCOPY
(ADDTOVAR INEWCOMS
(FNS \LOCKFN \LOCKVAR \LOCKCELL \LOCKWORDS \LOCKCODE)
(ALLOCAL (ADDVARS (LOCKEDFNS \FAULTHANDLER \FAULTINIT \DOVE.FAULTINIT \D01.FAULTINIT
\DL.FAULTINIT \CHAIN.UP.RPT \MAKESPACEFORLOCKEDPAGE \PAGEFAULT
\WRITEMAP \LOOKUPPAGEMAP \LOCKEDPAGEP \LOADVMEMPAGE \MOVEREALPAGE
\INVALIDADDR \INVALIDVP \SELECTREALPAGE \TRANSFERPAGE \SPECIALRP
\UPDATECHAIN \MARKPAGEVACANT \FLUSHPAGE \CLEARWORDS \FLUSHVM
\DONEWPAGE \ASSURE.FPTOVP.PAGE \DONEWEPHEMERALPAGE
\WRITEDIRTYPAGE1 \COPYSYS0 \COPYSYS0SUBR \RELEASEWORKINGSET
\DOFLUSHVM \DOLOCKPAGES \DOTEMPLOCKPAGES \TEMPUNLOCKPAGES
\MP.ERROR RAID \DL.NEWFAULTINIT \DL.MARK.PAGES.UNAVAILABLE
\DL.UNMAPPAGES \DL.ASSIGNBUFFERS \D01.ASSIGNBUFFERS
\DOCOMPRESSVMEM \MOVEVMEMFILEPAGE \SET.VMEM.FULL.STATE \HINUM
\LONUM \ATOMCELL SETTOPVAL)
(LOCKEDVARS \REALPAGETABLE \RPTLAST \PAGEFAULTCOUNTER \UPDATECHAINFREQ
\RPOFFSET \RPTSIZE \LOCKEDPAGETABLE \EMBUFBASE \EMBUFVP \EMBUFRP
\LASTACCESSEDVMEMPAGE \MAXSHORTSEEK \MAXCLEANPROBES \MINSHORTSEEK
\DIRTYPAGECOUNTER \DIRTYPAGEHINT \VMEM.INHIBIT.WRITE
\VMEM.PURE.LIMIT \VMEM.FULL.STATE \GUARDVMEMFULL VMEM.COMPRESS.FLG
\KBDSTACKBASE \MISCSTACKBASE \DOFAULTINIT \FPTOVP \MACHINETYPE
\VMEMACCESSFN \TELERAIDBUFFER \EMUDISKBUFFERS \EMUDISKBUFEND
\MAXSWAPBUFFERS \EMUBUFFERS \#EMUBUFFERS \#SWAPBUFFERS \#DISKBUFFERS
\RCLKSECOND \RCLKMILLISECOND \VALSPACE \EMUSWAPBUFFERS
\EM.CURSORBITMAP \PAGEMAP \PageMapTBL \IOCBPAGE \IOPAGE \MISCSTATS
\DEFSPACE \InterfacePage \LASTVMEMFILEPAGE \DoveIORegion
\MaxScreenPage \NEWVMEMPAGEADDED))))
)
(DECLARE: DONTEVAL@LOAD DOEVAL@COMPILE DONTCOPY COMPILERVARS
(ADDTOVAR NLAMA )
(ADDTOVAR NLAML )
(ADDTOVAR LAMA VMEM.PURE.STATE)
)
(PUTPROPS LLFAULT COPYRIGHT ("Xerox Corporation" 3676Q 3677Q 3700Q 3701Q 3702Q))
(DECLARE: DONTCOPY
(FILEMAP (NIL (23237Q 24101Q (\FAULTHANDLER 23251Q . 24077Q)) (24133Q 44630Q (\FAULTINIT 24145Q .
32667Q) (\D01.FAULTINIT 32671Q . 41060Q) (\D01.ASSIGNBUFFERS 41062Q . 44626Q)) (44631Q 132574Q (
\DOVE.FAULTINIT 44643Q . 47752Q) (\DL.FAULTINIT 47754Q . 54677Q) (\DL.NEWFAULTINIT 54701Q . 120311Q) (
\DL.UNMAPPAGES 120313Q . 121332Q) (\DL.MARK.PAGES.UNAVAILABLE 121334Q . 122077Q) (\DL.ASSIGNBUFFERS
122101Q . 125443Q) (\CHAIN.UP.RPT 125445Q . 132572Q)) (132575Q 220032Q (\PAGEFAULT 132607Q . 136332Q)
(\INVALIDADDR 136334Q . 136613Q) (\INVALIDVP 136615Q . 137057Q) (\FLUSHPAGE 137061Q . 144266Q) (
\LOADVMEMPAGE 144270Q . 150665Q) (\MOVEREALPAGE 150667Q . 153665Q) (\LOOKUPPAGEMAP 153667Q . 155315Q)
(\VALIDADDRESSP 155317Q . 155612Q) (\LOCKEDPAGEP 155614Q . 156761Q) (\SELECTREALPAGE 156763Q . 201214Q
) (\SPECIALRP 201216Q . 202625Q) (\TRANSFERPAGE 202627Q . 211315Q) (\UPDATECHAIN 211317Q . 220030Q)) (
220033Q 334125Q (\NEWPAGE 220045Q . 221622Q) (\DONEWPAGE 221624Q . 231467Q) (\ASSURE.FPTOVP.PAGE
231471Q . 235022Q) (\MAKESPACEFORLOCKEDPAGE 235024Q . 242716Q) (\MOVEVMEMFILEPAGE 242720Q . 245141Q) (
\NEWEPHEMERALPAGE 245143Q . 245736Q) (\DONEWEPHEMERALPAGE 245740Q . 254161Q) (\LOCKPAGES 254163Q .
255100Q) (\DOLOCKPAGES 255102Q . 264546Q) (\TEMPLOCKPAGES 264550Q . 265335Q) (\DOTEMPLOCKPAGES 265337Q
. 270131Q) (\TEMPUNLOCKPAGES 270133Q . 273365Q) (\UNLOCKPAGES 273367Q . 276261Q) (\FLUSHVM 276263Q .
301431Q) (\LOGOUT0 301433Q . 303372Q) (\DOFLUSHVM 303374Q . 312656Q) (\RELEASEWORKINGSET 312660Q .
314614Q) (\WRITEDIRTYPAGE 314616Q . 331035Q) (\WRITEDIRTYPAGE1 331037Q . 332701Q) (\COUNTREALPAGES
332703Q . 334123Q)) (334126Q 340101Q (\DOCOMPRESSVMEM 334140Q . 337044Q) (VMEM.PURE.STATE 337046Q .
340077Q)) (340102Q 353130Q (32MBADDRESSABLE 340114Q . 340550Q) (\SET.VMEM.FULL.STATE 340552Q . 342663Q
) (\DOVMEMFULLINTERRUPT 342665Q . 351075Q) (\FLUSHVMOK? 351077Q . 353126Q)) (354536Q 355176Q (
\MP.ERROR 354550Q . 355174Q)) (355225Q 403007Q (\ACTONVMEMFILE 355237Q . 356042Q) (\SHOWPAGETABLE
356044Q . 363605Q) (CHECKPAGEMAP 363607Q . 372141Q) (CHECKFPTOVP 372143Q . 372747Q) (CHECKFPTOVP1
372751Q . 374143Q) (\PRINTFPTOVP 374145Q . 402466Q) (\PRINTVP 402470Q . 403005Q)) (423750Q 452134Q (
ADDPME 423762Q . 427431Q) (CHECKIFPAGE 427433Q . 427711Q) (DUMPINITPAGES 427713Q . 435445Q) (
MAKEROOMFORPME 435447Q . 437450Q) (MAPPAGES 437452Q . 440320Q) (READPAGEMAP 440322Q . 446304Q) (
READPAGEMAPBLOCK 446306Q . 447102Q) (SETUPPAGEMAP 447104Q . 452132Q)) (455000Q 457362Q (\LOCKFN
455012Q . 455520Q) (\LOCKCODE 455522Q . 456063Q) (\LOCKVAR 456065Q . 456341Q) (\LOCKCELL 456343Q .
456612Q) (\LOCKWORDS 456614Q . 457360Q)))))
STOP