(DEFINE-FILE-INFO PACKAGE "INTERLISP" READTABLE "INTERLISP" BASE 10)

(FILECREATED "21-Mar-2021 21:33:01" {DSK}<home>larry>ilisp>medley>sources>LLFAULT.;10
 501717Q

      changes to%:  (VARS LLFAULTCOMS)

      previous date%: "16-Mar-2021 20:27:50" {DSK}<home>larry>ilisp>medley>sources>LLFAULT.;8)


(* ; "
Copyright (c) 1982-1993, 2021 by Venue & Xerox Corporation.
")

(PRETTYCOMPRINT LLFAULTCOMS)

(RPAQQ LLFAULTCOMS

       [(VARS (FAULTTEST T))
        (COMS                                                (* ; 

                                                 "Bootstrap code, run once when an image is booted")

              (FNS \FAULTINIT \D01.FAULTINIT \D01.ASSIGNBUFFERS \MAIKO.FAULTINIT \MAIKO.NEWFAULTINIT
                   \MAIKO.ASSIGNBUFFERS \M-VMEMSAVE \MAIKO.NEWPAGE)
              
              (* ;; "For setting up (and maybe eventually removing?) MAIKO-specific versions of the generic low-levle functions:")


              (FNS \MAIKO.DO.MOVDS)
              (ADDVARS (\MAIKO.MOVDS (TRUE \LOCKEDPAGEP)
                              (\MAIKO.NEWPAGE \NEWPAGE)
                              (\MAIKO.NEWPAGE \DONEWPAGE)
                              (NILL \LOCKPAGES)
                              (NILL \DOLOCKPAGES)
                              (NILL \DOTEMPLOCKPAGES)
                              (NILL \TEMPUNLOCKPAGES)
                              (NILL \UNLOCKPAGES)
                              (NILL \WRITEDIRTYPAGE)
                              (NILL \DIRTYBACKGROUND)
                              (ZERO \COUNTREALPAGES)
                              (NILL \SHOWPAGETABLE)
                              (NILL CHECKPAGEMAP)
                              (EVQ \PAGEFAULT)
                              (EVQ \LOADVMEMPAGE)
                              (NILL \LOADVMEMPAGE)
                              (TRUE \MOVEVMEMFILEPAGE)
                              (TRUE \VALIDADDRESSP)))
              (FNS \DOVE.FAULTINIT \DL.FAULTINIT \DL.NEWFAULTINIT \DL.UNMAPPAGES 
                   \DL.MARK.PAGES.UNAVAILABLE \DL.ASSIGNBUFFERS \CHAIN.UP.RPT))
        (COMS                                                (* ; "Pagefault handler")

              (FNS \FAULTHANDLER \PAGEFAULT \INVALIDADDR \INVALIDVP \FLUSHPAGE \LOADVMEMPAGE 
                   \MOVEREALPAGE \LOOKUPPAGEMAP \VALIDADDRESSP \LOCKEDPAGEP \SELECTREALPAGE 
                   \SPECIALRP \TRANSFERPAGE \UPDATECHAIN))
        (COMS                                                (* ; 

                                                           "Allocating and locking new pages")

              (FNS \NEWPAGE \DONEWPAGE \ASSURE.FPTOVP.PAGE \MAKESPACEFORLOCKEDPAGE \MOVEVMEMFILEPAGE
                   \NEWEPHEMERALPAGE \DONEWEPHEMERALPAGE \LOCKPAGES \DOLOCKPAGES \TEMPLOCKPAGES 
                   \DOTEMPLOCKPAGES \TEMPUNLOCKPAGES \UNLOCKPAGES))
        (COMS                                                (* ; "Writing out the vmem")

              (FNS \DOFLUSHVM \RELEASEWORKINGSET \WRITEDIRTYPAGE \WRITEDIRTYPAGE1 \COUNTREALPAGES))
        (COMS                                                (* ; "VMEM.PURE.STATE hack")

              (FNS \DOCOMPRESSVMEM VMEM.PURE.STATE))
        (COMS 
              (* ;; "Handling the backing store getting too full--keep running, but if we overflow, we can never \FLUSHVM because there is no place to write some pages")


              (FNS 32MBADDRESSABLE \SET.VMEM.FULL.STATE \SET.LASTVMEMFILEPAGE \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 signaled in the maintenance panel")

              (FNS \MP.ERROR))
        (COMS                                                (* ; 

                          "Debugging code.  Some of this also runs renamed for extra TeleRaid help")

              (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 CHECKPAGEMAP \SHOWPAGETABLE VMEM.PURE.STATE \COUNTREALPAGES 
                            \WRITEDIRTYPAGE \UNLOCKPAGES \TEMPUNLOCKPAGES \DOTEMPLOCKPAGES 
                            \DOLOCKPAGES \LOCKPAGES \LOADVMEMPAGE])

(RPAQQ FAULTTEST
 T)



(* ; "Bootstrap code, run once when an image is booted")


(DEFINEQ

(\FAULTINIT

  [LAMBDA NIL                                                (* ; "Edited 30-Mar-88 17:30 by Snow")


(* ;;; "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")


    (SETQ \MACHINETYPE (fetch
 MachineType of
 \InterfacePage))
    [PROG NIL
          (COND
             ((EQ \MACHINETYPE \MAIKO)
              (\MAIKO.FAULTINIT
)
              (RETURN NIL)))
          (OR (NEQ (fetch
 FPTOVPStart of
 \InterfacePage)
                   0)
              (\MP.ERROR
 \MP.OBSOLETEVMEM "No FPTOVP"))
          (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
 '\KEYHANDLER)
                                                                         (FUNCTION \KEYHANDLER))
                                                                        (T '\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%: "20-Oct-86 18:19")

    (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))
    [COND
       ((AND (EQ \MACHINETYPE \DORADO)
             (ILEQ 5124 (fetch
 RVersion of
 \InterfacePage)))
        (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)
                                                   (COND
                                                      ((BITTEST (RWMufMan I)
                                                              (MASK.1'S 15 1))
                                                       0)
                                                      (T 1] finally
 (RETURN N]
    (\CHAIN.UP.RPT
)
    (\D01.ASSIGNBUFFERS
])

(\D01.ASSIGNBUFFERS

  [LAMBDA NIL                                                (* bvm%: "20-Oct-86 18:21")

    (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])

(\MAIKO.FAULTINIT

  [LAMBDA NIL                                                (* ; "Edited  2-Jan-93 12:25 by jds")

    (SETQ \VMEMACCESSFN (FUNCTION NILL))                     (* ; "This variable must be the name of function that may be ACTONVMEMFILE that may write back  from VP to FP. But , in Katana type, this function may be required (by tt)")

    (SETQ \IOCBPAGE (create
 POINTER
                           PAGE# _ \VP.IOCBS))

    (* ;; "MOVD all the Maiko-specific low-level functions onto their generic counterparts:")


    (\MAIKO.DO.MOVDS
)
    (\MAIKO.NEWFAULTINIT
)
    (SETQ \RCLKMILLISECOND 1000)
    (SETQ \RCLKSECOND 1000000)
    (\RCLK (LOCF (fetch
 BASECLOCK of
 \MISCSTATS)))   (* ; "Reset base clock ")

    (\PUTBASEPTR (LOCF (fetch
 SECONDSCLOCK of
 \MISCSTATS))
           0 NIL)                                            (* ; "Clear the seconds timer (by tt)")

    (\PUTBASEPTR (LOCF (fetch
 MILLISECONDSCLOCK of
 \MISCSTATS))
           0 NIL)                                            (* ; "Clear the milliseconds timer")

                                                             (* SETQ \LASTVMEMFILEPAGE

                                                           (fetch (IFPAGE DLLastVmemPage) of 

                                                           \InterfacePage))

    (\SETIOPOINTERS])

(\MAIKO.NEWFAULTINIT

  [LAMBDA NIL                                                (* ; 

                                                         "Edited 26-Feb-88 14:07 by Osamu Nakamura")


    (* ;; "We have just started up on a Katana.  Boot code (SYSOUT Loader) may map FP to VP(VP is same map to RP). Therefore, in this function, only done the initialization of the gloval variables (particularly, the variables about Buffers). And, there is not /REALPAGETABLE in Katana.")


    (PROG ((NBUFFERS (IDIFFERENCE \DLBUFFERPAGES 2)))        (* ; "Allocate buffers")

          (\MAIKO.ASSIGNBUFFERS
 (create
 POINTER
                                           PAGE# _ \VP.BUFFERS)
                 NBUFFERS])

(\MAIKO.ASSIGNBUFFERS

  [LAMBDA (BASE NPAGES)                                      (* ; 

                                                           "Edited 14-May-88 18:31 by JMTurn")

    (PROGN                                                   (* ; 

                    "Allocate a page to hold name and password, and perhaps other ephemeral things")

           (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 \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])

(\M-VMEMSAVE

  [LAMBDA NIL                                                (* ; 

                                                           "Edited 20-Apr-88 10:28 by MASINTER")

    (PROG ((SCRATCHBUF \EMUSWAPBUFFERS))
          (replace
 (IFPAGE MISCSTACKRESULT) of
 \InterfacePage with
 T)
          [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")


              (* ;; "following form doesn't eval for KATANA (\TRANSFERPAGE IFPVP \FirstVmemBlock (RPTFROMRP (\READRP IFPVP)) T NIL)")


              ))
          (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))
          (SUBRCALL VMEMSAVE)
          (RETURN NIL])

(\MAIKO.NEWPAGE

  [LAMBDA (BASE NOERROR LOCK?)                               (* ; 

                                                           "Edited 20-Apr-88 10:28 by MASINTER")

    (SUBRCALL NEWPAGE BASE])
)



(* ;; 
"For setting up (and maybe eventually removing?) MAIKO-specific versions of the generic low-levle functions:"
)


(DEFINEQ

(\MAIKO.DO.MOVDS

  [LAMBDA NIL                                                (* ; 

                                                      "Edited  2-Nov-92 03:57 by sybalsky:mv:envos")


    (* ;; "MOVD all the Maiko-specific low-level functions onto their generic counterparts.  This function is called from \MAIKO.FAULTINIT when the system is started up, and called explicitly during the LOADUP process to get everything in a state to run the ethernet.")


    (* ;; "THIS IS WHERE CHANGES SHOULD HAPPEN TO MAKE SUN LOADUPS RUN ON D-MACHINES (BY ADDING A \MAIKO.UNDO.MOVDS CALL AT VMEM SAVING TIME, AND ADDING A SYBMOL TO SAVE THE GENERIC DEFINITION ON TO THE MOVDS LIST.")


    (FOR
 PAIR IN
 \MAIKO.MOVDS DO
 

                                 (* ;; "This is like MOVD, but absolutely no consing is done, frame names are not changed, etc.  So that no CONSING happens before all the MOVDs are finished -- prevents new-page allocation.")


                                            (LET [(FROMCELL (fetch
 (LITATOM DEFINITIONCELL)
                                                               of
 (CAR PAIR)))
                                                  (TOCELL (fetch
 (LITATOM DEFINITIONCELL)
                                                             of
 (CADR PAIR]
                                                 (UNINTERRUPTABLY
                                                     (replace
 (DEFINITIONCELL DEFPOINTER)
                                                        of
 TOCELL with
 (fetch

                                                                                (DEFINITIONCELL
                                                                                 DEFPOINTER)
                                                                                  of
 FROMCELL))
                                                     (replace
 (DEFINITIONCELL DEFCELLFLAGS)
                                                        of
 TOCELL with
 (fetch

                                                                                (DEFINITIONCELL
                                                                                 DEFCELLFLAGS)
                                                                                  of
 FROMCELL))
                                                     (replace
 (DEFINITIONCELL AUXDEFCELLFLAGS)
                                                        of
 TOCELL with
 (fetch

                                                                                (DEFINITIONCELL
                                                                                 AUXDEFCELLFLAGS)
                                                                                  of
 FROMCELL)))])
)

(ADDTOVAR \MAIKO.MOVDS

          (TRUE \LOCKEDPAGEP)
          (\MAIKO.NEWPAGE \NEWPAGE)
          (\MAIKO.NEWPAGE \DONEWPAGE)
          (NILL \LOCKPAGES)
          (NILL \DOLOCKPAGES)
          (NILL \DOTEMPLOCKPAGES)
          (NILL \TEMPUNLOCKPAGES)
          (NILL \UNLOCKPAGES)
          (NILL \WRITEDIRTYPAGE)
          (NILL \DIRTYBACKGROUND)
          (ZERO \COUNTREALPAGES)
          (NILL \SHOWPAGETABLE)
          (NILL CHECKPAGEMAP)
          (EVQ \PAGEFAULT)
          (EVQ \LOADVMEMPAGE)
          (NILL \LOADVMEMPAGE)
          (TRUE \MOVEVMEMFILEPAGE)
          (TRUE \VALIDADDRESSP))
(DEFINEQ

(\DOVE.FAULTINIT

  [LAMBDA NIL                                                (* ; "Edited 18-Sep-87 16:01 by bvm:")

    (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 (COND
                               (NIL                          (* ; "For now, don't assume vmem is any bigger than the part in use now.  Local file system init will set it to the truth.")

                                    (SETQ \VMEM.FULL.STATE 0)(* ; "Flag to keep pages from being written off the end.  Setting it now prevents bogus vmem full interrupt at startup time.")

                                    (fetch
 (IFPAGE NActivePages) of
 \InterfacePage))
                               (T                            (* ; 

                                                           "Microcode is supposed to fill this in")

                                  (fetch
 (IFPAGE DLLastVmemPage) of
 \InterfacePage]
    (\DoveDisk.Init)
    (SETMAINTPANEL 1192)
    (\DoveDisplay.TurnOn])

(\DL.FAULTINIT

  [LAMBDA NIL                                                (* bvm%: "20-Oct-86 18:22")

    (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                                                (* ; "Edited 21-Oct-87 15:40 by bvm:")


    (* ;; "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 (+ 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 (+ (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
 (> 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
                                                                        (+ 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 (+ SCRATCHVP I)
                                  (+ \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 (+ SCRATCHVP I)
                                  0 \VMAP.VACANT)
                          (\WRITEMAP (+ \VP.DISPLAY I)
                                 (+ \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 (+ \VP.DOVEIORGN I
                                                                                      )
                                                                               (+ \RP.DOVEIORGN I)
                                                                               \VMAP.CLEAN))
              (\DoveIO.InitializeIORegionPtrs)))
          [PROG ((RPSIZE (- NREALPAGES (SETQ \RPOFFSET -1)))
                 (FIRSTVP \VP.RPT))
                (SETQ FIRSTRP (COND
                                 ((OR (> 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")

                [COND
                   ((> RPSIZE (CONSTANT (EXPT 2 15)))        (* ; 

        "We only have 15 bits for real page table numbers, so have to sacrifice the rest of memory")

                    (SETQ RPSIZE (CONSTANT (EXPT 2 15]
                [SETQ RPTPAGES (PROGN 

                                 (* ;; "This is a way of computing (FOLDHI RPSIZE*3 WORDSPERPAGE) that won't overflow when memory exceeds 10.6MB -- the first term computes RPSIZE*3/256, the second performs the FOLDHI directly on the now much smaller remainder.")


                                      (+ (TIMES3 (FOLDLO RPSIZE WORDSPERPAGE))
                                         (FOLDHI (TIMES3 (IMOD RPSIZE WORDSPERPAGE))
                                                WORDSPERPAGE]
                (COND
                   ((> (+ 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 (- NREALPAGES RPTPAGES)))
                                                             (* ; 

                            "IMIN because we could be on a wide-display Daybreak with small memory")

                    [COND
                       ((> (+ FIRSTVP RPTPAGES)
                           \VP.BUFFERS)                      (* ; 

                                                   "Move virtual assignment backwards if necessary")

                        (SETQ FIRSTVP (COND
                                         ((< RPTPAGES \VP.BUFFERS)
                                          (- \VP.BUFFERS RPTPAGES))
                                         ((<= RPTPAGES PAGESPERSEGMENT)
                                                             (* ; 

                      "Can't fit real page table in display bank at all, so overlap smallneg space")

                                          (UNFOLD \SmallNegHi PAGESPERSEGMENT))
                                         (T                  (* ; 

                                    "Ack, more than 10.6 MB, have to slop over into smallpos space")

                                            (- (+ (UNFOLD \SmallNegHi PAGESPERSEGMENT)
                                                  PAGESPERSEGMENT)
                                               RPTPAGES]
                    (\DL.UNMAPPAGES
 (DLFPFROMRP FIRSTRP)
                           (DLFPFROMRP (+ 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 (+ FIRSTVP I)
                                                                          (+ FIRSTRP I)
                                                                          \VMAP.CLEAN))
                (SETQ \REALPAGETABLE (create
 POINTER
                                            PAGE# _ FIRSTVP))
                (\CLEARWORDS \REALPAGETABLE RPSIZE)
                (\CLEARWORDS (\ADDBASE \REALPAGETABLE RPSIZE)
                       RPSIZE)
                (\CLEARWORDS (\ADDBASE (\ADDBASE \REALPAGETABLE RPSIZE)
                                    RPSIZE)
                       RPSIZE)                               (* ; 

                                  "Clear table in three steps, since 3*RPSIZE overflows after 10MB")

                (SETQ \RPTSIZE RPSIZE)
                (COND
                   [(EQ \MACHINETYPE \DANDELION)
                    (for
 NEXTBANK0 from
 2MBPAGES by
 2MBPAGES
                       until
 (> NEXTBANK0 NREALPAGES) do
 
                                                             (* ; 

                                                   "Mark the shadow display bank pages unavailable")

                                                                (\DL.MARK.PAGES.UNAVAILABLE

                                                                 NEXTBANK0
                                                                 (+ 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 (+ FIRSTRP RPTPAGES -1))
                                                             (* ; 

                                                           "Also, Dove IO region is unavailable")

                      (\DL.MARK.PAGES.UNAVAILABLE
 \RP.DOVEIORGN (SUB1 (+ \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
 (+ \VP.DISPLAY I))
                          (replace
 (RPT FILEPAGE) of
 RPTBASE with
 (DLFPFROMRP
                                                                               (+ \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 (<= 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 (- FIRSTUSEFULRP FIRSTBUFFERRP))) (* ; "Allocate buffers")

                (for
 I from
 0 to
 (SUB1 NBUFFERS) do
 (\WRITEMAP (+ \VP.BUFFERS I)
                                                                           (+ 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")

      ])
)



(* ; "Pagefault handler")


(DEFINEQ

(\FAULTHANDLER

  [LAMBDA NIL                                                (* ; "Edited 27-Sep-88 00:47 by jds")

    (PROG NIL
      LP  [OR (AND \DOFAULTINIT (\FAULTINIT
))
              (\PAGEFAULT
 (\VAG2 (LOGAND 255 (fetch
 (IFPAGE FAULTHI) of
 \InterfacePage))
                                     (fetch
 (IFPAGE FAULTLO) of
 \InterfacePage]
          (\CONTEXTSWITCH \FAULTFXP)
          (GO LP])

(\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%: "20-Oct-86 18:26")


    (* ;; "Returns the pagemap entry for VP, which is expected to be in bounds.  High bit of result is the lock bit.  Zero denotes absence")


    (LET [(PRIMENTRY (\GETBASE \PageMapTBL (fetch
 (VP PRIMARYKEY) of
 VP]
         (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])
)



(* ; "Allocating and locking new pages")


(DEFINEQ

(\NEWPAGE

  [LAMBDA (BASE NOERROR LOCK?)                               (* ; 

                                                      "Edited 24-Oct-92 12:45 by sybalsky:mv:envos")


(* ;;; "Creates and returns a new page located at virtual addr BASE")


    (* ;; "If LOCK?, lock the page into real memory (A NOP on nonXerox machines!)")


    (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%: "29-Jun-86 17:44")


    (* ;; "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.MISCLOCKED)))
                                                             (* ; 

                     "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%: "30-Oct-86 16:47")


(* ;;; "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")


    (LET ((VP (fetch
 (POINTER PAGE#) of
 BASE))
          MAPBASE PREVRP RPTINDEX RPTR)
         (COND
            ((fetch
 (VP INVALID) of
 VP)
             (\INVALIDVP
 VP)
             NIL)
            ([OR (AND (NEQ (SETQ MAPBASE (\GETBASE \PageMapTBL (fetch
 (VP PRIMARYKEY)
                                                                  of
 VP)))
                           \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)))
             BASE)
            (T (COND
                  ((IGREATERP \PAGEFAULTCOUNTER \UPDATECHAINFREQ)
                   (\UPDATECHAIN
)))
               (add
 \PAGEFAULTCOUNTER 1)
               (SETQ RPTINDEX (\SELECTREALPAGE
 NIL T '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)                                      (* ; "Edited 21-Oct-87 15:49 by bvm:")

    (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 RPINDEX (RPTFROMRP (SETQ RP (\READRP VP]
                        (SETQ RPTBASE (fetch
 RPTRBASE of
 RPINDEX))
                        [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)                                      (* ; "Edited 21-Oct-87 15:49 by bvm:")


    (* ;; "`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 RPINDEX (RPTFROMRP (SETQ RP (\READRP VP]
             (SETQ RPTBASE (fetch
 RPTRBASE of
 RPINDEX))
             [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)))])
)



(* ; "Writing out the vmem")


(DEFINEQ

(\DOFLUSHVM

  [LAMBDA (MAIKO.SYSOUTFILE)
                             (* ; "Edited 10-Feb-2021 22:38 by lmm")

                                                             (* ; 

                                                           "Edited  6-Jan-89 19:23 by Hayata")


(* ;;; "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")


     (* ;; "update interface pge before writing out sysout")


          (replace
 (IFPAGE CurrentFXP) of
 \InterfacePage with
 (fetch
 (IFPAGE MiscFXP)
                                                                             of
 \InterfacePage))
          (RETURN (SUBRCALL VMEMSAVE MAIKO.SYSOUTFILE])

(\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 '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])
)



(* ; "VMEM.PURE.STATE hack")


(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 '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])])
)



(* ;; 
"Handling the backing store getting too full--keep running, but if we overflow, we can never \FLUSHVM because there is no place to write some pages"
)


(DEFINEQ

(32MBADDRESSABLE

  [LAMBDA NIL
                                         (* ; "Edited  2-May-88 22:03 by MASINTER")

    (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 'DIRTY])

(\SET.LASTVMEMFILEPAGE

  [LAMBDA (N)
                                            (* ; "Edited  6-Apr-87 14:09 by bvm:")


    (* ;; "Called by disk routines when they discover how long the physical vmem is.  Currently only used by Dove.")


    (COND
       ((IGREATERP (fetch
 (IFPAGE NActivePages) of
 \InterfacePage)
               (IDIFFERENCE (SETQ \LASTVMEMFILEPAGE N)
                      \GUARDVMEMFULL))                       (* ; "Vmem getting full!")

        (\SET.VMEM.FULL.STATE
))
       (T                                                    (* ; 

                                          "Vmem ok now (was earlier set to full for safety's sake)")

          (SETQ \VMEM.FULL.STATE NIL)))
    N])

(\DOVMEMFULLINTERRUPT

  [LAMBDA NIL
                                            (* ; "Edited 21-Oct-87 13:54 by bvm:")


(* ;;; "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))

           (* ;; "Used to have code here that tried to extend the vmem file, but even on those that support extension it's flaky, and rarely what you want--people allocate the vmem file to the desired size in the first place, don't want it extended further.")


                     (PROG ((HELPFLAG '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")

                           (CL:CERROR "Resume the interrupted computation"
                                  (CONCAT "Your virtual memory backing file is "
                                         (COND
                                            ((>= (fetch
 (IFPAGE NActivePages) of
 
                                                                                       \InterfacePage
                                                        )
                                                 \LASTVMEMFILEPAGE)
                                             "complete")
                                            (T "near"))
                                         "ly full.
Save your work & reload a.s.a.p."])

(\FLUSHVMOK?

  [LAMBDA (TYPE NOERROR)                                     (* ; 

                                                           "Edited 10-Feb-2021 21:49 by larry")

                                                             (* bvm%: " 7-Sep-85 10:48")


(* ;;; "Called before any attempt to do a \FLUSHVM to make sure it's ok")


    T])
)

(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 signaled in the maintenance panel")


(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 code.  Some of this also runs renamed for extra TeleRaid help")


(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%: "12-Jul-86 16:55")

    (PROG ((*PRINT-BASE* 8)
           (OUTSTREAM (GETSTREAM FILE 'OUTPUT))
           (RPTR \REALPAGETABLE)
           (RP 0)
           FLAGS VP STATE FIRSTONE LASTONE)
          (printout OUTSTREAM "     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 OUTSTREAM "ditto thru " LASTONE T)
                                   (SETQ LASTONE NIL)))
                         (SETQ FIRSTONE RP)
                         (SETQ STATE VP)
                         (printout OUTSTREAM |.I7.8| (RPFROMRPT RP))
                         [COND
                            ((fetch
 (RPT EMPTY) of
 RPTR)
                             (PRIN1 " Empty" OUTSTREAM))
                            ((NOT (fetch
 (RPT OCCUPIED) of
 RPTR))
                             (PRIN1 " Unavailable" OUTSTREAM))
                            (T (printout OUTSTREAM |.I8.8| VP %,)
                               (\PRINTVP
 VP OUTSTREAM)
                               (printout OUTSTREAM 28 |.I6.8| (fetch
 (RPT FILEPAGE) of
 RPTR)
                                      %,,)
                               (COND
                                  ((fetch
 (RPT LOCKED) of
 RPTR)
                                   (COND
                                      ((NOT (\LOCKEDPAGEP
 VP))
                                                             (* ; "not permanently locked")

                                       (PRIN1 "Temp" OUTSTREAM)))
                                   (PRIN1 "Locked " OUTSTREAM)))
                               (UNLESSRDSYS (PROGN (COND
                                                      ((fetch
 (VMEMFLAGS REFERENCED)
                                                          of
 (SETQ FLAGS (\READFLAGS VP)))
                                                       (PRIN1 "Ref " OUTSTREAM)))
                                                   (COND
                                                      ((fetch
 (VMEMFLAGS DIRTY) of
 FLAGS)
                                                       (PRIN1 "Dirty" OUTSTREAM]
                         (TERPRI OUTSTREAM])

(CHECKPAGEMAP

  [LAMBDA NIL
                                            (* bvm%: "12-Jul-86 16:56")

    (LET ((*PRINT-BASE* 8)
          (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 (FIRSTPAGE NWORDS TYPEFLG STREAM VPRAWFLG)
     (* bvm%: "24-Sep-86 11:44")

    (SETQ STREAM (GETSTREAM STREAM 'OUTPUT))
    (OR FIRSTPAGE (SETQ FIRSTPAGE 1))
    (OR NWORDS (SETQ NWORDS (fetch
 (IFPAGE NActivePages) of
 \InterfacePage)))
    (LET ((BASE (\ADDBASE \FPTOVP (SUB1 FIRSTPAGE)))
          (*PRINT-BASE* 8)
          (LASTVP -2)
          (NEXTFP (SUB1 FIRSTPAGE))
          FIRSTFP FIRSTVP NEXTVP LOCKEDP TYPE NEXTLOCKED NEXTTYPE)
         (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))
                      (if
 TYPEFLG
                          then
 (SETQ NEXTTYPE (TYPENAME (create
 POINTER
                                                                   PAGE# _ NEXTVP)))
                                (if
 (NULL NEXTTYPE)
                                    then
 (SETQ NEXTTYPE (SELECTC (LRSH NEXTVP 8)
                                                                ((LIST \PNAME.HI (CL:1+ \PNAME.HI)) 
                                                                     "Pnames")
                                                                ((LIST \DEF.HI (CL:1+ \DEF.HI)) 
                                                                     "Definitions")
                                                                ((LIST \VAL.HI (CL:1+ \VAL.HI)) 
                                                                     "Value cells")
                                                                ((LIST \PLIST.HI (CL:1+ \PLIST.HI)) 
                                                                     "Property lists")
                                                                ((\HILOC \FPTOVP) 
                                                                     "\FPTOVP")
                                                                (\STACKHI "Stack")
                                                                ((\HILOC \HTMAIN) 
                                                                     "GC Main table")
                                                                ((\HILOC \HTOVERFLOW) 
                                                                     "GC Overflow table")
                                                                NIL]
                  [COND
                     ([COND
                         ((EQ NEXTVP \NO.VMEM.PAGE)
                          (NEQ LASTVP \NO.VMEM.PAGE))
                         (T (OR (NEQ NEXTVP (ADD1 LASTVP))
                                (NEQ NEXTLOCKED LOCKEDP)
                                (NEQ TYPE NEXTTYPE]
                      [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 (if
 VPRAWFLG
                                                then
 (PRIN1 FIRSTVP STREAM)
                                              else
 (\PRINTVP
 FIRSTVP STREAM))
                                          (PRIN1 "-" STREAM)))
                                (if
 VPRAWFLG
                                    then
 (PRIN1 LASTVP STREAM)
                                  else
 (\PRINTVP
 LASTVP STREAM))
                                (COND
                                   (LOCKEDP (PRIN1 '* STREAM)))
                                (if
 TYPE
                                    then
 (printout STREAM 32 TYPE]
                      (SETQ FIRSTFP)
                      (TERPRI STREAM)
                      (SETQ FIRSTVP NEXTVP))
                     (T                                      (* ; "in a run")

                        (OR FIRSTFP (SETQ FIRSTFP (SUB1 NEXTFP]
                  (SETQ LASTVP NEXTVP)
                  (SETQ LOCKEDP NEXTLOCKED)
                  (SETQ TYPE NEXTTYPE)
                  (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)
                                      (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)
                      (VP WORD)
                      (FILEPAGE WORD))
                     (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 (\ADDBASE \REALPAGETABLE (LLSH DATUM 1))
                                     DATUM)))
)
(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)
                                       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 FIXP))
                        [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)
                                   ((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)
                                                 '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)
                        (* ; 

                                                "Edited  5-Nov-92 15:41 by sybalsky:mv:envos")


    (* ;; "Map thru all pages from BOT to TOP that exist, skipping the interface page, if it falls into that range.  Call FN on the page number.")


    (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
                                 (* ; 

                                                "Edited  5-Nov-92 16:03 by sybalsky:mv:envos")

                                                             (* ; 

                                             "called only from MAKEINIT to initialize the page map")

    (PROG NIL                                                (* ; "set up page map")

          (\NEWPAGE
 \PAGEMAP NIL T)                      (* ; 

                                                           "Create 1 page worth of real page table")

          (CREATEPAGES \PageMapTBL \NumPMTpages NIL T)       (* ; "And the segment table.")


     (* ;; "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
 CHECKPAGEMAP \SHOWPAGETABLE VMEM.PURE.STATE \COUNTREALPAGES \WRITEDIRTYPAGE 
                         \UNLOCKPAGES \TEMPUNLOCKPAGES \DOTEMPLOCKPAGES \DOLOCKPAGES \LOCKPAGES 
                         \LOADVMEMPAGE)
)
(PUTPROPS LLFAULT COPYRIGHT ("Venue & Xerox Corporation" 3676Q 3677Q 3700Q 3701Q 3702Q 3703Q 3704Q 
3705Q 3706Q 3707Q 3710Q 3711Q 3745Q))
(DECLARE%: DONTCOPY
  (FILEMAP (NIL (31106Q 65232Q (\FAULTINIT 31120Q . 40347Q) (\D01.FAULTINIT 40351Q . 45776Q) (
\D01.ASSIGNBUFFERS 46000Q . 51545Q) (\MAIKO.FAULTINIT 51547Q . 54334Q) (\MAIKO.NEWFAULTINIT 54336Q . 
55672Q) (\MAIKO.ASSIGNBUFFERS 55674Q . 61450Q) (\M-VMEMSAVE 61452Q . 64672Q) (\MAIKO.NEWPAGE 64674Q . 
65230Q)) (65432Q 73060Q (\MAIKO.DO.MOVDS 65444Q . 73056Q)) (74217Q 164677Q (\DOVE.FAULTINIT 74231Q . 
100624Q) (\DL.FAULTINIT 100626Q . 105717Q) (\DL.NEWFAULTINIT 105721Q . 152433Q) (\DL.UNMAPPAGES 
152435Q . 153423Q) (\DL.MARK.PAGES.UNAVAILABLE 153425Q . 154363Q) (\DL.ASSIGNBUFFERS 154365Q . 160106Q
) (\CHAIN.UP.RPT 160110Q . 164675Q)) (164742Q 251155Q (\FAULTHANDLER 164754Q . 165632Q) (\PAGEFAULT 
165634Q . 171373Q) (\INVALIDADDR 171375Q . 171651Q) (\INVALIDVP 171653Q . 172112Q) (\FLUSHPAGE 172114Q
 . 177255Q) (\LOADVMEMPAGE 177257Q . 203331Q) (\MOVEREALPAGE 203333Q . 206573Q) (\LOOKUPPAGEMAP 
206575Q . 207567Q) (\VALIDADDRESSP 207571Q . 210061Q) (\LOCKEDPAGEP 210063Q . 211265Q) (
\SELECTREALPAGE 211267Q . 233224Q) (\SPECIALRP 233226Q . 234243Q) (\TRANSFERPAGE 234245Q . 242106Q) (
\UPDATECHAIN 242110Q . 251153Q)) (251237Q 326030Q (\NEWPAGE 251251Q . 253267Q) (\DONEWPAGE 253271Q . 
263030Q) (\ASSURE.FPTOVP.PAGE 263032Q . 266004Q) (\MAKESPACEFORLOCKEDPAGE 266006Q . 273410Q) (
\MOVEVMEMFILEPAGE 273412Q . 276033Q) (\NEWEPHEMERALPAGE 276035Q . 276566Q) (\DONEWEPHEMERALPAGE 
276570Q . 304006Q) (\LOCKPAGES 304010Q . 304434Q) (\DOLOCKPAGES 304436Q . 314202Q) (\TEMPLOCKPAGES 
314204Q . 314713Q) (\DOTEMPLOCKPAGES 314715Q . 317730Q) (\TEMPUNLOCKPAGES 317732Q . 322614Q) (
\UNLOCKPAGES 322616Q . 326026Q)) (326076Q 350675Q (\DOFLUSHVM 326110Q . 330574Q) (\RELEASEWORKINGSET 
330576Q . 332366Q) (\WRITEDIRTYPAGE 332370Q . 346134Q) (\WRITEDIRTYPAGE1 346136Q . 347463Q) (
\COUNTREALPAGES 347465Q . 350673Q)) (350743Q 354272Q (\DOCOMPRESSVMEM 350755Q . 353273Q) (
VMEM.PURE.STATE 353275Q . 354270Q)) (354541Q 365050Q (32MBADDRESSABLE 354553Q . 355221Q) (
\SET.VMEM.FULL.STATE 355223Q . 357144Q) (\SET.LASTVMEMFILEPAGE 357146Q . 360517Q) (
\DOVMEMFULLINTERRUPT 360521Q . 364264Q) (\FLUSHVMOK? 364266Q . 365046Q)) (366524Q 367160Q (\MP.ERROR 
366536Q . 367156Q)) (367311Q 417121Q (\ACTONVMEMFILE 367323Q . 370122Q) (\SHOWPAGETABLE 370124Q . 
375625Q) (CHECKPAGEMAP 375627Q . 403511Q) (CHECKFPTOVP 403513Q . 404525Q) (CHECKFPTOVP1 404527Q . 
405716Q) (\PRINTFPTOVP 405720Q . 416603Q) (\PRINTVP 416605Q . 417117Q)) (437066Q 466564Q (ADDPME 
437100Q . 442447Q) (CHECKIFPAGE 442451Q . 442723Q) (DUMPINITPAGES 442725Q . 450343Q) (MAKEROOMFORPME 
450345Q . 452045Q) (MAPPAGES 452047Q . 453246Q) (READPAGEMAP 453250Q . 462425Q) (READPAGEMAPBLOCK 
462427Q . 463217Q) (SETUPPAGEMAP 463221Q . 466562Q)) (471673Q 474241Q (\LOCKFN 471705Q . 472410Q) (
\LOCKCODE 472412Q . 472754Q) (\LOCKVAR 472756Q . 473226Q) (\LOCKCELL 473230Q . 473474Q) (\LOCKWORDS 
473476Q . 474237Q)))))
STOP