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Lars Brinkhoff 6e18f5ebef Extract files from tape images. 
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This file contains invisible Unicode characters
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;TITLE MAP - DECsystem-10 page mapper
SUBTTL D. P. Mastrovito /DPM
;COPYRIGHT (C) 1980,1981,1982,1983,1984,1985,1986 BY
;DIGITAL EQUIPMENT CORPORATION, MAYNARD, MASS.
;
;
;THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY BE USED AND COPIED
;ONLY IN ACCORDANCE WITH THE TERMS OF SUCH LICENSE AND WITH THE
;INCLUSION OF THE ABOVE COPYRIGHT NOTICE. THIS SOFTWARE OR ANY OTHER
;COPIES THEREOF MAY NOT BE PROVIDED OR OTHERWISE MADE AVAILABLE TO ANY
;OTHER PERSON. NO TITLE TO AND OWNERSHIP OF THE SOFTWARE IS HEREBY
;TRANSFERRED.
;
;THE INFORMATION IN THIS SOFTWARE IS SUBJECT TO CHANGE WITHOUT NOTICE
;AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY DIGITAL EQUIPMENT
;CORPORATION.
;
;DIGITAL ASSUMES NO RESPONSIBILITY FOR THE USE OR RELIABILITY OF ITS
;SOFTWARE ON EQUIPMENT WHICH IS NOT SUPPLIED BY DIGITAL.
; Version numbers
;
MAPMAJ==2 ;MAJOR VERSION
MAPMIN==0 ;MINOR VERSION
MAPEDT==57 ;EDIT NUMBER
MAPWHO==0 ;WHO DID IT
%%MAP==<BYTE(3)MAPWHO(9)MAPMAJ(6)MAPMIN(18)MAPEDT>
MAPDAY=="20" ;BUILD DAY
MAPMON=="Mar" ;BUILD MONTH
MAPYER=="86" ;BUILD YEAR
SALL ;FOR CLEAN LISTINGS
.DIRECT FLBLST ;FOR CLEANER LISTINGS
SUBTTL Table of Contents
; Table of Contents for MAP %2(35)
;
;
; Section Page
; 1. Table of contents. . . . . . . . . . . . . . . . . . . 2
; 2. Revision history . . . . . . . . . . . . . . . . . . . 3
; 3. Compiler interface setup . . . . . . . . . . . . . . . 5
; 4. Program interface definitions. . . . . . . . . . . . . 8
; 5. Internal definitions . . . . . . . . . . . . . . . . . 9
; 6. .MAPD - Deposit. . . . . . . . . . . . . . . . . . . . 11
; 7. .MAPE - Examine. . . . . . . . . . . . . . . . . . . . 12
; 8. .MAPG - GETTAB UUO simulation. . . . . . . . . . . . . 13
; 9. .MAPI - Initialization . . . . . . . . . . . . . . . . 18
; 10. .MAPJ - JOBPEK UUO simulation. . . . . . . . . . . . . 25
; 11. Address mapping
; 11.1. Compute a mapped address. . . . . . . . . . . 27
; 11.2. Convert virtual to physical addresses . . . . 28
; 11.3. Copy a block of mapped data . . . . . . . . . 30
; 11.4. KA relocation and protection. . . . . . . . . 31
; 11.5. KI paging . . . . . . . . . . . . . . . . . . 32
; 11.6. KL paging . . . . . . . . . . . . . . . . . . 33
; 11.7. Dispatch tables . . . . . . . . . . . . . . . 35
; 11.8. Monitor . . . . . . . . . . . . . . . . . . . 36
; 11.9. Job . . . . . . . . . . . . . . . . . . . . . 38
; 11.10. File. . . . . . . . . . . . . . . . . . . . . 40
; 12. Cache management
; 12.1. Clear out the cache . . . . . . . . . . . . . 42
; 12.2. Map the cache . . . . . . . . . . . . . . . . 43
; 12.3. Set up the hash tables and links. . . . . . . 45
; 12.4. Set cache size. . . . . . . . . . . . . . . . 46
; 12.5. Allocate a chunk for the cache. . . . . . . . 47
; 12.6. Deallocate a page from the cache. . . . . . . 48
; 12.7. Find an entry in the cache. . . . . . . . . . 49
; 12.8. Insert (replace) a new page in the cache. . . 50
; 12.9. Move entry to top of list . . . . . . . . . . 51
; 13. Text I/O
; 13.1. Character . . . . . . . . . . . . . . . . . . 52
; 13.2. ASCIZ . . . . . . . . . . . . . . . . . . . . 53
; 13.3. Sixbit. . . . . . . . . . . . . . . . . . . . 54
; 13.4. Octal . . . . . . . . . . . . . . . . . . . . 55
; 13.5. Filespec. . . . . . . . . . . . . . . . . . . 56
; 13.6. Miscellaneous . . . . . . . . . . . . . . . . 57
; 14. Paging
; 14.1. Check accessibility . . . . . . . . . . . . . 58
; 14.2. Create/Destroy. . . . . . . . . . . . . . . . 59
; 14.3. SPY page creation . . . . . . . . . . . . . . 60
; 15. File I/O
; 15.1. Open a file . . . . . . . . . . . . . . . . . 61
; 15.2. Close a file. . . . . . . . . . . . . . . . . 63
; 15.3. Position a file . . . . . . . . . . . . . . . 64
; 15.4. Input/Output. . . . . . . . . . . . . . . . . 65
; 15.5. Scan a filespec . . . . . . . . . . . . . . . 66
; 16. EXE file routines
; 16.1. Load and validate directory . . . . . . . . . 69
; 16.2. Find a file page. . . . . . . . . . . . . . . 71
; 16.3. Find a directory block. . . . . . . . . . . . 72
; 17. FORTRAN interface. . . . . . . . . . . . . . . . . . . 73
; 18. Context switch . . . . . . . . . . . . . . . . . . . . 74
; 19. Error handling . . . . . . . . . . . . . . . . . . . . 75
; 20. AC save routines . . . . . . . . . . . . . . . . . . . 82
; 21. Literals . . . . . . . . . . . . . . . . . . . . . . . 84
; 22. Data storage . . . . . . . . . . . . . . . . . . . . . 85
; 23. End. . . . . . . . . . . . . . . . . . . . . . . . . . 86
SUBTTL Revision history
; 1 Creation. Map virtual monitor addresses.
;
; 2 Map physical monitor addresses.
;
; 3 Add job mapping.
;
; 4 Start adding code for file mapping.
;
; 5 Change calling conventions to always use a single AC. Add
; FORTRAN interface.
;
; 6 More work on file mapping. Accept ASCIZ filespecs.
;
; 7 Handle multiple directory page EXE files.
;
; 10 Implement new page caching routines.
;
; 11 Add TITLE. macro.
;
; 12 Shuffle lots of code into a more logical organization. Start
; to clean up initialization code.
;
; 13 Begin adding intelligent error handling.
;
; 14 Edit 10 broke file mapping badly. Make it work again. Remove
; all references to AC 'I' as well as the old paralell mapping
; tables.
;
; 15 Finally add code to handle GETTAB immediate of the range table.
;
; 16 Add support for pathological names.
;
; 17 Attempt to close off old channel from previous call early
; in the .MAPI routine.
;
; 20 Rewrite the FORTRAN interface. /WSM
;
; 21 Finish adding error handling for all non-I/O errors.
;
; 22 Store the CPU and paging type in the data block.
;
; 23 Add support for KL paging shared and indirect pointers.
;
; 24 Avoid an extra GETTAB simulation by reading low core location 22
; to get paging type and APR serial number. Then convert serial
; number to CPU type. Always use physical addressing when looking
; at low core.
;
; 25 Redefine all FL.??? and FR.??? flags as 18 bit quantities. Fix
; bug in testing for physical pages that caused CSHFND to never
; find a page in the cache sometimes. Add AC save co-routines.
; 26 Remove .MPCOR mapping code and add code to handle virtual vs.
; physical memory addressing correctly. If the first 112K of the
; monitor is mapped one for one virtual to physical, remember this
; so subsequent address calculations can bypass expensive exec
; page mapping code.
;
; 27 Enhance the FORTRAN interface again by making it type out errors
; if the caller doesn't setup a return address. /WSM
;
; 30 Don't terminate text blocks with a NUL. This confuses FORTRAN.
; Zero the blocks instead. Don't use the caller's stack, set up
; an internal one. Invent a flag word in the data block which is
; non-zero if SPYing. Add flag MP.SPY to require SPYing if so
; requested. Remove the 20 page restriction on cache size. The
; sky's the limit or CORMAX (which ever comes first). Return the
; sixbit prefix so a superior program can do intelligent things.
;
; 31 Add support for reading funny space. Also fix bugs associated
; with KL paging indirect pointers.
;
; 32 GETTAB values for start and end of funny space, and the highest
; unmapped exec address. Remove code to compute these values and
; associated flags.
;
; 33 Speed up JOBPEK simulation by doing either a MOVE and MOVEM,
; DMOVE and DMOVEM, or a BLT to transfer data from mapped pages
; to user pages. Remove COUNT. macro.
;
; 34 Fix up filespec defaulting and better handle sixbit PPNs.
; Remove last references to ACs P1 and P2.
;
; 35 Incorporate the FORTRAN INCLUDE file in the MACRO sources.
;
; 36 Make hardware KI paging work. It's about time!
;
; 37 Make use of new FILOP. function to return the filespec of crash file.
;
; 40 Speed up initialization by a factor of two.
;
; 41 Edit 15 didn't quite make it. Teach OCTOUT about negative numbers.
; Type negative GETTAB tables as -n.
;
; 42 Rework GTBINI extensively by removing old BOOTWD hack to determine
; the CPU and paging type. Use the Exec Data Vector if we can.
;
; 43 Rewrite the TITLE. macro, add build string for WSM. Add symbolic
; offsets for initialization block. Add routine .MAPC to clear
; out the mapper statistics block. Don't set a PATH. block pointer
; if there's no directory (default [-] correctly).
;
; 44 Add crock to check for monitor's high segment being mapped. This
; will allow GETTABs of values in the high segment to work on unrun
; monitors.
;
; 45 In file mode, get the returned filespec with one FILOP. UUO, not
; two. Replace MPIFF% (Initialization Failed for File mapping) with
; a the more general code MPMIP% (Mapper Initialization failure).
;
; 46 Add .MAPI argument .MPDSN to specify the default section number to
; use if an address of 400000,,n is given. This will normally be set
; to zero to things don't break. Also, add an internal argument block
; so programs have to assemble in the argument block length.
;
; 47 Include cosmetic improvements and KL paging patch supplied by
; Joe Smith of the Colorado School of Mines. The KL paging stuff
; fixes an old WHO bug that caused address calculations to fail while
; trying to examine non-zero section addresses in a crash file.
;
; 50 Add copyrights to .MAC, .REL, and .FOR files.
;
; MAP %2(50) released with 7.02
;
; 51 Add counter .MPJPU to tally up the number of JOBPEK UUOs executed.
;
; 52 Remove references to PAGADR. It's not needed.
;
; 53 During GETTAB initialization, if the highest unmapped exec address
; is known, use it instead of defaulting it to DEFUEA.
;
; 54 Correct FORTRAN definition of .MPJPU (JOBPEK UUOs executed).
;
; 55 Fix typo in error message. Update copyrights.
;
; 56 (RDH) Fix to handle extended/PSECTed monitors - use %CNSUP system
; uptime as "mapped" flag for .EXE files.
;
; 57 Process entry vector blocks in .EXE directories.
SUBTTL Macros
; Macros to accumulate text
;
DEFINE INIT. (ARG),<
DEFINE ARG'.. (TEXT),<
DEFINE APPND. (X,Y,Z),<ARG'.. (<TEXT''X'Y'Z>)>
DEFINE ARG'.,<TEXT>
> ;END ARG'..
ARG'..
> ;END INIT.
; Macro to build a byte pointer to a masked quantity
;
DEFINE POINTR (A,M),<POINT <^L<-<<M>_<^L<M>>>-1>>,A,<<^L<<M>&<-<M>>>>>>
; Macro to generate calls to the error handler
;
DEFINE ERR. (COD,RET),<
PUSHJ P,[PUSHJ P,ERROR
IFNB <COD>,<MP'COD'%>,,RET]
>
; Macro to generate mapping error table entries
;
DEFINE MERR. (SYM,TXT),<
.XCREF ...ERR, MP'SYM'%
...ERR==...ERR+1
MP'SYM'%==:...ERR
''SYM'',,[ASCIZ |TXT|]
>
; Macro to generate a TITLE, build, and version text
;
DEFINE TITLE. (NAM,ABV,TXT),<
MN1==<ABV'MIN/^D26>
IFE MN1,<MN2==ABV'MIN>
IFG MN1,<MN2=ABV'MIN-<^D26*MN1>>
IFE ABV'MIN-^D26,<MN2==<ABV'MIN+<MN1==0>>>
IFE ABV'MIN-^D52,<MN2==<<^D26-1>+<MN1==1>>>
IFN MN1,<MN1==MN1+"@">
IFN MN2,<MN2==MN2+"@">
MNV==<<MN1_7>!MN2>
;; Generate TITLE
INIT. (TTL)
APPND. (<TITLE 'NAM %>,\ABV'MAJ,)
IFN MNV,<APPND. (,\"MNV,)>
APPND. (<(>,\ABV'EDT,<)>)
IFN ABV'WHO,<APPND. (<->,\ABV'WHO,)>
APPND. (< >,'TXT,)
TTL.
;; Generate PRINTX
INIT. (PTX)
APPND. (<PRINTX ['NAM %>,\ABV'MAJ,)
IFN MNV,<APPND. (,\"MNV,)>
APPND. (<(>,\ABV'EDT,<)>)
IFN ABV'WHO,<APPND. (<->,\ABV'WHO,)>
APPND. (< >,'TXT,)
IFN FTFORTRAN,<APPND. (< FORTRAN interface>,,)>
appnd. (<]>,,)
IF2,<PTX.>
;; Generate build date
INIT. (BLD)
APPND. (<ASCIZ |'NAM version >,\ABV'MAJ,)
IFN MNV,<APPND. (,\"MNV,)>
APPND. (<(>,\ABV'EDT,<)>)
IFN ABV'WHO,<APPND. (<->,\ABV'WHO,)>
APPND. (< built on >,\"ABV'DAY,<->)
APPND. (\"ABV'MON,<->,\"ABV'YER)
APPND. (<|>,,)
;; Generate program version
INIT. (VER)
APPND. (<ASCIZ |'NAM %>,\ABV'MAJ,)
IFN MNV,<APPND. (,\"MNV,)>
APPND. (<(>,\ABV'EDT,<)>)
IFN ABV'WHO,<APPND. (<->,\ABV'WHO,)>
APPND. (<|>,,)
;; Generate copyright text
INIT. (CPY)
IFE COMPILER,<
APPND. (<ASCIZ |>,\"15,\"12)
APPND. (<'NAM %>,\ABV'MAJ,)
IFN MNV,<APPND. (,\"MNV,)>
APPND. (<(>,\ABV'EDT,<)>)
IFN ABV'WHO,<APPND. (<->,\ABV'WHO,)>
APPND. (< 'TXT>,\"15,\"12)
>
IFN COMPILER,<
APPND. (<ASCIZ |>,,)
>
APPND. (<COPYRIGHT (C) DIGITAL EQUIPMENT CORPORATION >,,)
APPND. (<1980,1986. ALL RIGHTS RESERVED.>,,)
APPND. (\"15,\"12,<|>)
>
TITLE. (MAP,MAP,<DECsystem-10 page mapper>)
DEFINE STR (TEXT),<IFN COMPILER,<ASCIZ |TEXT|>>
DEFINE CRLF,<IFN COMPILER,<BYTE(7)15,12>>
DEFINE BLK% (MAC,FOR,WDS),<
MAC==:<FOR==:OFFSET>
CRLF
STR < PARAMETER 'FOR = ">
STR (\OFFSET)
OFFSET==OFFSET+WDS
> ;END DEFINE BLK%
DEFINE SYM% (MAC,FOR,VAL),<
IFDIF <None><MAC>,<MAC==:VAL>
IFDIF <None><FOR>,<
CRLF
STR < PARAMETER 'FOR = "'VAL>
> ;END IFDIF
> ;END DEFINE SYM%
SUBTTL MACRO-10/compiler interface setup
OFF==0 ;TURNS A FEATURE TEST OFF
ON==1 ;TURNS A FEATURE TEST ON
COMPILER==0 ;INITIALLY NO COMPILER CODE
HGHORG==400000 ;HIGH SEGMENT ORIGIN
DEFINE FT (FTS,VAL),<
IFNDEF FT'FTS,FT'FTS==VAL ;;SET DEFAULT VALUE
IFN FT'FTS,<FT'FTS==FT'FTS&1> ;;NORMALIZE SETTING
COMPILER==COMPILER+<IFN FT'FTS,<1>> ;;MAYBE TURN ON COMPILER CODE
> ;END DEFINE FT
FT FORTRAN,OFF ;FORTRAN INTERFACE
IFG COMPILER-1,<
PRINTX ? Multiple interfaces selected
PASS2
END
>
IFE COMPILER,<
SEARCH UUOSYM ;FOR TOPS-10 UUO SYMBOLS
TWOSEG ;MAKE US SHARABLE
RELOC HGHORG ;START LOADING HERE
.MAP:: ENTRY .MAP,.MAPI,MAPI ;LOAD IF LIBRARY SEARCH
COPYRI: CPY. ;GENERATE COPYRIGHT TEXT
BUILD: BLD. ;GENERATE BUILD TEXT
VERSIO: VER. ;GENERATE VERSION TEXT
> ;END IFE COMPILER
IFN COMPILER,<RIM10>
SUBTTL Program interface definitions
STR <
! >
IFN COMPILER,<VER.>
STR <
! Definitions for the FORTRAN interface
!
!>
IFN COMPILER,<CPY.>
STR <!
! This file should be INCLUDEd any FORTRAN program
! wanting to use the MAP subroutine. Only flag,
! constants, and offset definitions are in this
! file. Read MAP.MAC for a complete discription of
! the calling sequences for the FORTRAN and MACRO
! interfaces to MAP.
>
OFFSET==0
STR <
! Initialization block offsets
>
BLK% .MPFNC, MPIFNC, 1 ; Flag and function code word
BLK% .MPNPC, MPINPC, 1 ; Number of pages to cache
BLK% .MPSPN, MPISPN, 1 ; Starting page number
BLK% .MPDSN, MPIDSN, 1 ; Default section number
BLK% .MPARG, MPIARG, 1 ; Function dependant argument
; zero for .MPMON
; job number for .MPJOB
; address of filespec for .MPFIL
BLK% .MPMAX, MPDMAX, 0 ; Length of argument block
STR <
! Initialization flags
>
SYM% MP.PPM, MPFPPM, 200000000000 ; Physical page mapping
SYM% MP.PAT, MPFPAT, 100000000000 ; Enable patching
SYM% MP.EXE, MPFEXE, 040000000000 ; EXE file mapping
SYM% MP.PIO, MPFPIO, 020000000000 ; Physical-only OPEN/LOOKUP on file
SYM% MP.RTM, MPFRTM, 010000000000 ; Return run time statistics
SYM% MP.SIO, MPFSIO, 004000000000 ; Super I/O
SYM% MP.JRM, MPFJRM, 002000000000 ; Use JOBPEK UUOs instead of simulation
SYM% MP.SPY, MPFSPY, 001000000000 ; Job needs to SPY
STR <
! Mapping functions
>
SYM% .MPMON, MPFMON, 0 ; Map the running monitor (PEEK)
SYM% .MPJOB, MPFJOB, 1 ; Map a job in the running monitor (JOBPEK)
SYM% .MPFIL, MPFFIL, 2 ; Map a data or EXE file (FILDDT)
SYM% .MPFMX, MPFFMX, 2 ; Highest known mapping code
STR <
! CPU type codes
>
SYM% .PDP6, PDP6, 1 ; CP166 processor
SYM% .KA10, KA10, 2 ; KA10 processor
SYM% .KI10, KI10, 3 ; KI10 processor
SYM% .KL10, KL10, 4 ; KL10 processor
SYM% .KS10, KS10, 5 ; KS10 processor
SYM% .KC10, KC10, 6 ; KC10 processor
STR <
! Paging codes
>
SYM% .KARPR, KARPR, 1 ; KA Relocation & Protection Registers
SYM% .KIPAG, KIPAG, 2 ; KI paging on a KI10, KL10, or KS10
SYM% .KLPAG, KLPAG, 3 ; KL paging on a KL10 or KS10
SYM% .KCPAG, KCPAG, 4 ; KL paging on a KC10
STR <
! Random constants
>
SYM% .AP, None, 1 ; MACRO AC for argument passing
SYM% .MPEWD, MPFEWD, 30 ; Length of ASCIZ error buffers
SYM% .MPFWD, MPFFWD, 21 ; Length of ASCIZ filespec in words
OFFSET==0
STR <
! Data block offsets
>
BLK% .MPDAT, MPDDAT, 1 ; Count of words in data block
BLK% .MPVER, MPDVER, 1 ; MAP version number
BLK% .MPSPY, MPDSPY, 1 ; Non-zero if SPYing
BLK% .MPCPU, MPDCPU, 1 ; CPU type
BLK% .MPPAG, MPDPAG, 1 ; Paging type
BLK% .MPPGS, MPDPGS, 1 ; Number of pages availble for mapping
BLK% .MPCPC, MPDCPC, 1 ; Cached page count
BLK% .MPCPN, MPDCPN, 1 ; Starting cached page number
BLK% .MPSEC, MPDSEC, 1 ; Default section number
Z.BSTS==OFFSET
BLK% .MPPGC, MPDPGC, 1 ; Count of mapped page creates
BLK% .MPPGD, MPDPGD, 1 ; Count of mapped page destroys
BLK% .MPADR, MPDADR, 1 ; Count of mapped address computations
BLK% .MPEXM, MPDEXM, 1 ; Count of mapped examines
BLK% .MPDEP, MPDDEP, 1 ; Count of mapped deposits
BLK% .MPGTB, MPDGTB, 1 ; Count of mapped GETTABs
BLK% .MPGTU, MPDGTU, 1 ; Count of GETTAB UUOs executed
BLK% .MPJPK, MPDJPK, 1 ; Count of mapped JOBPEK UUOs
BLK% .MPJPU, MPDJPU, 1 ; Count of JOBPEK UUOs executed
BLK% .MPRTM, MPDRTM, 1 ; Run time
BLK% .MPHSF, MPDHSF, 1 ; Count of hash table searches
Z.ESTS==OFFSET
BLK% .MPHSC, MPDHSC, 1 ; Count of hash table collisions
BLK% .MPAFS, MPDAFS, .MPFWD ; Actual filespec
BLK% .MPECD, MPDECD, 1 ; Mapping error code
BLK% .MPPFX, MPDPFX, 1 ; Right justified sixbit prefix
BLK% .MPMET, MPDMET, .MPEWD ; Mapping error text
BLK% .MPXET, MPDXET, .MPEWD ; Extended error text
BLK% .MPLEN, MPDLEN, 0 ; Length of data block
IFN COMPILER,<END>
SUBTTL Internal definitions
; Accumulators
;
T1==1 ;FOUR
T2==2 ; TEMPORARY
T3==3 ; ACS
T4==4 ; ...
A1==5 ;4 ACS USED FOR
A2==6 ; MAPPED ADDRESS
A3==7 ; CALCULATIONS &
A4==10 ; CACHE HANDLING
VMA==11 ;VIRTUAL MEMORY ADDRESS
PMA==12 ;PHYSICAL MEMORY ADDRESS
SPT==13 ;SPT BASE ADDRESS
F==14 ;FLAGS
P==17 ;PDL
.AP==T1 ;USER COMMUMICATES THROUGH THIS AC
; Random values
;
PDLSIZ==50 ;INTERNAL PDL SIZE
PAGSIZ==1000 ;SIZE OF A PAGE IN WORDS
PAGNUM==^D20 ;DEFAULT NUMBER OF PAGES TO MAP
HGHPAG==700 ;HIGHEST PAGE NUMBER +1 TO USE
DEFPAG==HGHPAG-PAGNUM ;DEFAULT STARTING PAGE NUMBER
ABSTAB==410 ;ADDRESS OF POINTER TO NUMTAB
DEFEPT==1000 ;DEFAULT EPT ADDRESS
DEFUEA==<<^D112*^D1024>-1> ;DEFAULT HIGHEST UNMAPPED EXEC ADDRESS
DEFPBA==<^D112*^D1024> ;DEFAULT PER-PROCESS BEGINNING ADDRESS
DEFPEA==<<^D112+^D16>*^D1024> ;DEFAULT PER-PROCESS ENDING ADDRESS
DEFORG==400000 ;DEFAULT MONITOR'S HIGH SEGMENT ORIGIN
FOPSIZ==.FOMAX ;SIZE OF A FILOP. UUO BLOCK
LERSIZ==.RBMAX ;SIZE OF A LOOKUP/ENTER UUO BLOCK
PTHSIZ==.PTLEL ;SIZE OF A PATH. UUO BLOCK
FILSIZ==.FOFMX ;SIZE OF A RETURNED FILESPEC BLOCK
; Cache blocks
;
...X==.
PHASE 0
.CBNHB:! BLOCK 1 ;NEXT HASH BLOCK
.CBPHB:! BLOCK 1 ;PREVIOUS HASH BLOCK
.CBNAB:! BLOCK 1 ;NEXT ACCESSED BLOCK
.CBPAB:! BLOCK 1 ;PREVIOUS ACCESS BLOCK
.CBPRC:! BLOCK 1 ;PROCESS PAGE NUMBER
.CBUSR:! BLOCK 1 ;USER PAGE NUMBER
.CBFLG:! BLOCK 1 ;FLAGS
CB.AVA==1B0 ;CHUNK IS FREE
CB.CRE==1B1 ;USER PAGE HAS BEEN CREATED
CB.PHY==1B2 ;PHYSICAL PAGE (NOT VIRTUAL)
CB.UPD==1B3 ;UPDATE PAGE ON NEXT REPLACE
.CBLEN:! ;LENGTH
DEPHASE
; RELOC ...X
PURGE ...X
; Copy block offsets
;
...X==.
PHASE 0
.CBWCT:! BLOCK 1 ;WORD COUNT
.CBRAD:! BLOCK 1 ;READ ADDRESS (SOURCE)
.CBWAD:! BLOCK 1 ;WRITE ADDRESS (DESTINATION)
.CBXLN:! ;LENGTH
DEPHASE
; RELOC ...X
PURGE ...X
SECTAB==540 ;OFFSET IN EPT OR UPT OF FIRST SECTION MAP POINTER
MXSECN==37 ;MAXIMUM NUMBER OF SECTIONS ON A KL10
; Flags in AC 'F'
;
FL.XXX==400000 ;RESERVED
FL.PPM==200000 ;.MAPI FLAG - PHYSICAL PAGE MAPPING
FL.PAT==100000 ;.MAPI FLAG - PATCH
FL.EXE== 40000 ;.MAPI FLAG - .EXE FILE MAPPING
FL.PIO== 20000 ;.MAPI FLAG - PHYSICAL FILE I/O
FL.RTM== 10000 ;.MAPI FLAG - RETURN RUNTIM STATISTICS
FL.SIO== 4000 ;.MAPI FLAG - SUPER I/O
FL.JRM== 2000 ;.MAPI FLAG - JOBPEK UUOS ON MONITOR
FL.SPY== 1000 ;.MAPI FLAG - JOB NEEDS SPY/WE CAN SPY
FL.INI==377000 ;.MAPI FLAGS
FL.EPM== 100 ;EXEC PHYSICAL PAGE MAPPING
FL.TPP== 40 ;TEMPORARY PHYSICAL PAGE MAPPING
FL.GTS== 20 ;GETTAB SIMULATION SETUP
FL.DEV== 10 ;FILESPEC SCANNER - DEVICE
FL.NAM== 4 ;FILESPEC SCANNER - FILE NAME
FL.EXT== 2 ;FILESPEC SCANNER - EXTENSION
FL.DIR== 1 ;FILESPEC SCANNER - DIRECTORY
FR.TYP==777777 ;MAPPING TYPE
SUBTTL .MAPC - Clear out mapper statistics
; Routine to clear out the mapper statistics block
; Call: PUSHJ P,.MAPC
; <NON-SKIP>
; <SKIP>
;
.MAPC:: PUSHJ P,CONTXT ;CONTEXT SWITCH
MOVEI T1,MAPDAT ;POINT TO START OF MAPPER DATA
SETZM Z.BSTS(T1) ;CLEAR FIRST WORD
MOVSI T2,Z.BSTS(T1) ;GET START ADDRESS
HRRI T2,Z.BSTS+1(T1) ;MAKE A BLT POINTER
BLT T2,Z.ESTS-1(T1) ;CLEAR THE BLOCK
JRST CPOPJ1 ;AND RETURN
SUBTTL .MAPD - Deposit
; Deposit into a mapped location
; Call: MOVE .AP, ADDR
; PUSHJ P,.MAPD
; <NON-SKIP> ;FAILED
; <SKIP> ;SUCEEDED, ACS UNCHANGED
;
; ADDR: address to deposit into
; old contents
; new contents
;
.MAPD:: PUSHJ P,CONTXT ;CONTEXT SWITCH
MOVEI T1,3 ;3 WORDS IN BLOCK
MOVE T2,USRACS+.AP ;GET ARG POINTER
MOVE T1,0(T2) ;GET WORD 0
MOVEM T1,POKBLK+0 ;SAVE
MOVE T1,1(T2) ;GET WORD 1
MOVEM T1,POKBLK+1 ;SAVE
MOVE T1,2(T2) ;GET WORD 2
MOVEM T1,POKBLK+2 ;SAVE
MOVE T1,POKBLK+0 ;GET ADDRESS TO DESPOSIT INTO
PUSHJ P,ADDRESS ;COMPUTE A MAPPED ADDRESS
ERR. (DAF,CPOPJ) ;DEPOSIT ADDRESS FAILURE
MOVE T2,(T1) ;GET CONTENTS
CAME T2,POKBLK+1 ;WHAT THE USER THINKS IT SHOULD BE?
ERR. (DVM,CPOPJ) ;DEPOSIT VALUE DOESN'T MATCH
CAMN T2,POKBLK+2 ;OLD CONTENTS SAME AS NEW CONTENTS?
JRST CPOPJ1 ;YES - THEN NOTHING TO DO
MOVE T3,POKBLK+2 ;GET WORD TO DEPOSIT
PUSHJ P,@DEPTAB(F) ;DO IT
POPJ P, ;FAILED
AOS MAPDAT+.MPDEP ;COUNT THE DEPOSIT
JRST CPOPJ1 ;RETURN
SUBTTL .MAPE - Examine
; Examine a mapped location
; Call: MOVE T1, address
; PUSHJ P,.MAPE
; <NON-SKIP> ;FAILED
; <SKIP> ;SUCEEDED, T1:= C(ADDR)
;
.MAPE:: PUSHJ P,CONTXT ;CONTEXT SWITCH
MOVE T1,USRACS+.AP ;GET REAL T1
PUSHJ P,EXAMINE ;DO THE EXAMINE
POPJ P, ;CAN'T
MOVEM T1,USRACS+.AP ;STORE IN REAL T1
JRST CPOPJ1 ;RETURN
PEXAMINE:TLOA F,FL.TPP ;ALLOW PHYSICAL PAGE MAPPING
VEXAMINE:TLZ F,FL.TPP ;ALLOW VIRTUAL PAGE MAPPING
EXAMINE:PUSHJ P,ADDRESS ;COMPUTE MAPPED ADDRESS
ERR. (EAF,CPOPJ) ;EXAMINE ADDRESS FAILURE
MOVE T1,(T1) ;GET CONTENTS
AOS MAPDAT+.MPEXM ;COUNT THE EXAMINE
JRST CPOPJ1 ;AND RETURN
SUBTTL .MAPG - GETTAB UUO simulation
; This routine will simulate a GETTAB UUO. The calling sequence is exactly
; like a GETTAB UUO. If the simulation fails, and monitor mapping is being
; done, a GETTAB UUO will be tried. A skip return implies the requested
; monitor information has been retrieved. A non-skip return means the GETTAB
; arguments are illegal.
;
; Historical note:
; The GETTAB UUO (CALLI 41) is new with the 3.19 monitor release. The UUO was
; implemented to allow unprivileged programs to examine various monitor tables.
; CALL: HRROI AC, MONITOR JOB TABLE NUMBER ;NEG. TABLES FOR CUSTOMER
; HRLI AC, JOB NUMBER ;LH .EQ. -1 CURRENT JOB
; ;LH .EQ. -2 CURRENT HIGH-SEG
; CALL AC, [SIXBIT /GETTAB/] ;OR CALLI AC,41
;
.MAPG:: PUSHJ P,CONTXT ;CONTEXT SWITCH
MOVE T1,USRACS+.AP ;GET REAL T1
PUSHJ P,GTBSIM ;DO THE GETTAB SIMULATION
SKIPA ;FAILED
AOS (P) ;SKIP
MOVEM T1,USRACS+.AP ;STORE IN REAL T1
POPJ P, ;AND RETURN
GTBSIM: MOVEM T1,GTBARG ;SAVE THE ARGUMENT
HRRES T1 ;GET THE TABLE NUMBER
CAIN T1,.GTIDX ;RANGE TABLE?
HLRE T1,GTBARG ;YES--GET INDEX (TABLE NUMBER)
ADD T1,NUMTAB ;OFFSET INTO NUMTAB
PUSHJ P,EXAMINE ;READ NUMTAB ENTRY
JRST GTBS.1 ;MAYBE NO PRIVS
MOVEM T1,GTBNUM ;STORE FOR LATER
LDB T1,GTBTYP ;GET TABLE TYPE CODE
TLNE F,FL.GTS ;GETTAB SIMULATION SETUP?
CAIL T1,GTBLEN ;DO WE KNOW ABOUT THIS TABLE?
GTBS.1: MOVEI T1,0 ;NO--INDEX ZERO TO ATTEMPT GETTAB UUO
MOVEM T1,GTBIDX ;SAVE INDEX FOR LATER
HRRZ T2,GTBARG ;GET THE TABLE NUMBER
CAIN T2,.GTIDX ;THE RANGE TABLE?
MOVEI T1,.SLIXR ;YES
PUSHJ P,@GTBTAB(T1) ;DO SOMETHING
SKIPA T1,GTBIDX ;GET INDEX IF SIMULATION FAILED
JRST GTBS.2 ;GOT IT
JUMPN T1,GTBS.1 ;TRY THE UUO IF WE CAN
MOVE T1,GTBARG ;LOST AGAIN--RELOAD THE ARGUMENT
ERR. (GUF,CPOPJ) ;GETTAB UUO/SIMULATION FAILED
GTBS.2: AOS MAPDAT+.MPGTB ;COUNT THE GETTAB
JRST CPOPJ1 ;RETURN
; GETTAB simulator dispatch table
;
GTBTAB: EXP UNKNTB ;UNKNOWN TABLE
EXP ITEMTB ;ITEM NUMBER
EXP JOBNTB ;JOB NUMBER
EXP SEGNTB ;SEGMENT NUMBER
EXP JPDBTB ;JOB NUMBER (DATA IN PDB)
EXP RNGETB ;NEGATIVE AND POSITIVE NUMBERS
GTBLEN==.-GTBTAB ;LENGTH OF TABLE
; Byte pointers to parts of GETTAB arguments.
;
GTBMAX: POINTR (GTBNUM,SL.MAX) ;MAXIMUM ITEM NUMBER IN TABLE
GTBTYP: POINTR (GTBNUM,SL.TYP) ;TYPE OF TABLE IDENTIFIER
GTBMAC: POINTR (GTBNUM,SL.MAC) ;A MONITOR AC NUMBER
GTBADR: POINTR (GTBNUM,SL.ADR) ;EXECUTIVE MODE ADDRESS OF TABLE IF
; SL.TYP=1,2,3 OR OFFSET TO PDB IF
; SL.TYP=4
; GETTAB table types. The values here MUST correspond to the order of
; GTBTAB. They are included for documentation purposes and to force
; them into the symbol table, but are never referenced directly.
;
.SLNIC==.SLNIC ;(0) NOT INCLUDED IN THIS CONFIGURATION
.SLIXI==.SLIXI ;(1) INDEX BY ITEM NUMBER
.SLIXJ==.SLIXJ ;(2) INDEX BY JOB NUMBER
.SLIXS==.SLIXS ;(3) INDEX BY JOB NUMBER OR SEGMENT NUMBER
.SLIXP==.SLIXP ;(4) INDEX BY JOB NUMBER (DATA IN PDB)
.SLIXR==.SLIXR ;(5) INDEX BY NEGATIVE AND POSITIVE OFFSETS
; BITS 12,13 RESERVED FOR DEC
; Masks of low and high ranges of GETTAB tables indexed by negative and
; positive numbers (table type SL.IXR). These are never referenced but
; are included for documantaion and to force the symbols into the symbol
; table.
;
ID.MIN==ID.MIN ;LOW RANGE OF TABLE
ID.MAX==ID.MAX ;HIGH RANGE OF TABLE
; Unknown table type
;
UNKNTB: MOVE T1,GTBARG ;PICK UP USER ARGUMENTS
HRRZ T2,F ;GET JUST THE MAPPING TYPE
CAIN T2,.MPMON ;MAPPING A RUNNING MONITOR?
GETTAB T1, ;YES - TRY THE GETTAB UUO
SOS (P) ;LOSE
AOS MAPDAT+.MPGTU ;COUNT NUMBER OF GETTAB UUOS EXECUTED
JRST CPOPJ1 ;RETURN
; Item table type
;
ITEMTB: HLRE T1,GTBARG ;GET REQUESTED ITEM NUMBER
LDB T2,GTBMAX ;GET MAXIMUM LENGTH OF THE TABLE
SKIPL T1 ;NEGATIVE INDEX IS ILLEGAL
CAMLE T1,T2 ;WITHIN LEGAL RANGE?
POPJ P, ;NOPE
LDB T2,GTBADR ;GET TABLE BASE ADDRESS
ADD T1,T2 ;OFFSET INTO TABLE
PUSHJ P,EXAMINE ;GET C(T1)
POPJ P, ;CAN'T
JRST CPOPJ1 ;RETURN SUCESSFUL
; Job table type
;
JOBNTB: HLRE T1,GTBARG ;GET JOB NUMBER
CAMN T1,[-1] ;OUR JOB?
MOVE T1,USRJOB ;YES - GET IT
SKIPL T1 ;CAN'T HAVE A NEGATIVE JOB NUMBER
CAMLE T1,JOBN ;WITHIN LEGAL RANGE?
POPJ P, ;NOPE
LDB T2,GTBADR ;GET TABLE BASE ADDRESS
ADD T1,T2 ;INDEX INTO TABLE
PUSHJ P,EXAMINE ;GET C(T1)
POPJ P, ;CAN'T
JRST CPOPJ1 ;RETURN SUCESSFUL
; Segment table type
;
SEGNTB: HLRE T1,GTBARG ;GET SEGMENT NUMBER
CAMN T1,[-1] ;OUR JOB NUMBER?
MOVE T1,USRJOB ;YES - LOAD OUR JOB NUMBER
CAME T1,[-2] ;OUR SEGMENT NUMBER?
JRST SEGN.1 ;NO
MOVE T1,JBTSGN ;GET JOB TO SEG TRANSLATION
ADD T1,USRJOB ;ADD IN OUR JOB NUMBER
PUSHJ P,EXAMINE ;GET C(T1)
POPJ P, ;CAN'T
HRRZS T1 ;KEEP JUST THE SEGMENT NUMBER
JUMPE T1,CPOPJ ;RETURN IF NO HIGH SEGMENT
SEGN.1: SKIPL T1 ;CAN'T HAVE NEGATIVE JOB OR SEG NUMBERS
CAMLE T1,SEGN ;WITHIN LEGAL RANGE?
POPJ P, ;NOPE
LDB T2,GTBADR ;GET TABLE BASE ADDRESS
ADD T1,T2 ;OFFSET INTO TABLE
PUSHJ P,EXAMINE ;GET C(T1)
POPJ P, ;CAN'T
JRST CPOPJ1 ;RETURN SUCESSFUL
; PDB table type
;
JPDBTB: HLRE T1,GTBARG ;GET INDEX
CAMN T1,[-1] ;IS IT OUR JOB?
MOVE T1,USRJOB ;YES - LOAD JOB NUMBER
SKIPL T1 ;CAN'T HAVE NEGATIVE JOB NUMBERS
CAMLE T1,JOBN ;WITHIN LEGAL RANGE?
POPJ P, ;NOPE
ADD T1,JBTPDB ;OFFSET INTO JBTPDB
PUSHJ P,EXAMINE ;GET C(T1)
POPJ P, ;CAN'T
JUMPE T1,CPOPJ ;A PDB FOR REQUESTED JOB?
HRRZS T1 ;KEEP JUST THE ADDRESS
LDB T2,GTBADR ;GET INDEX INTO THE PDB
ADD T1,T2 ;OFFSET INTO THE PDB
PUSHJ P,EXAMINE ;GET C(T1)
POPJ P, ;CAN'T
JRST CPOPJ1 ;RETURN SUCESSFUL
RNGETB: LDB T1,GTBMAX ;GET MAXIMUM LENGTH OF THE TABLE
LDB T2,GTBTYP ;GET TABLE TYPE?
CAIE T2,.SLIXR ;INDEXED BY RANGE?
JRST CPOPJ1 ;NO--FAKED OUT BY GTBSIM
ADD T1,RNGTAB ;INDEX INTO RNGTAB
PUSHJ P,EXAMINE ;GET RANGE OF GETTAB TABLE
POPJ P, ;CAN'T
MOVEM T1,GTBRNG ;SAVE RANGE
HLRE T2,T1 ;GET LOWER LIMIT
HRRE T3,T1 ;GET UPPER LIMIT
HLRE T1,GTBARG ;GET USER SUPPLIED INDEX
CAMG T1,T3 ;GREATER THAN UPPER LIMIT?
CAMGE T1,T2 ;GREATER THAN OR EQUAL TO LOWER LIMIT?
POPJ P, ;NOPE
HRRE T2,GTBARG ;GET SUPPLIED TABLE NUMBER
CAIN T2,.GTIDX ;RANGE TABLE?
JRST RNGE.1 ;YES
LDB T2,GTBADR ;GET THE BASE ADDRESS OF THE TABLE
ADD T1,T2 ;ADD OFFSET
PUSHJ P,EXAMINE ;GET C(T1)
POPJ P, ;CAN'T
JRST CPOPJ1 ;RETURN SUCESSFUL
RNGE.1: MOVE T1,GTBRNG ;GET LOWER,,UPPER LIMITS
JRST CPOPJ1 ;AND RETURN
SUBTTL .MAPI - Initialization
; This routine MUST be called before all others
; Call: MOVE .AP, flags + argument
; PUSHJ P,.MAPI
; <NON-SKIP> ;FAILED
; <SKIP> ;SUCEEDED
;
.MAPI:: PUSH P,T1 ;SAVE T1
PUSH P,FILCHN ;SAVE OLD CHANNEL NUMBER
MOVE T1,[ZBEG,,ZBEG+1] ;SET UP BLT
SETZM ZBEG ;CLEAR FIRST WORD
BLT T1,ZEND-1 ;CLEAR OUR DATA STORAGE
POP P,FILCHN ;RESTORE OLD CHANNEL NUMBER
POP P,T1 ;RESTORE T1
SETOM CTXFLG ;INIT CONTEXT FLAG
PUSHJ P,CONTXT ;SAVE THE WORLD
PUSHJ P,DATINI ;GET INITIALIZE DATA
JRST MAPI.E ;CAN'T
PUSHJ P,CSHCLR ;CLEAR OUT THE CACHE
PUSHJ P,CSHMAP ;MAP THE HASH TABLE AND CHUNK PAGES
JRST MAPI.E ;FAILED
PUSHJ P,FILCLS ;CLOSE OFF CHANNEL FROM PREVIOUS CALL
PUSHJ P,@INITAB(F) ;SETUP MAPPING
JRST MAPI.E ;FAILED
PUSHJ P,CSHINI ;SET UP HASH TABLE CHUNKS AND LINKS
MOVE A1,PAGCNT ;GET COUNT OF AVAILABLE PAGES
SETZM PAGCNT ;SO WE DON'T CONFUSE THINGS
PUSHJ P,CSHSIZ ;SET UP CACHE SIZE
JRST MAPI.E ;CAN'T
PUSHJ P,SPYCHK ;SEE IF WE NEED TO SPY
JRST MAPI.E ;NEED TO BUT CAN'T DO IT
PUSHJ P,GTBINI ;INITIALIZE GETTAB STUFF
AOS (P) ;SKIP
MAPI.E: MOVEI T1,MAPDAT ;GET ADDRESS OF DATA BLOCK
MOVEM T1,USRACS+.AP ;GIVE IT TO THE CALLER
POPJ P, ;RETURN
; Data block setup
;
DATINI: MOVEI T1,.MPLEN ;GET LENGTH OF DATA BLOCK
MOVEM T1,MAPDAT+.MPDAT ;SAVE IT
MOVE T1,[%%MAP] ;GET OUR VERSION
MOVEM T1,MAPDAT+.MPVER ;SAVE IT
MOVE T2,USRACS+.AP ;GET ARG POINTER
MOVE F,.MPFNC(T2) ;GET FLAGS AND MAPPING TYPE
AND F,[FL.INI,,FR.TYP] ;MAKE SURE THERE'S NO JUNK
HRRZ T1,F ;JUST THE MAPPING TYPE
CAILE T1,.MPFMX ;A GOOD NUMBER?
ERR. (IMC,CPOPJ) ;ILLEGAL MAPPING TYPE
DATI.1: SKIPN T1,.MPNPC(T2) ;GET NUMBER OF PAGES TO USE
MOVEI T1,PAGNUM ;NONE--LOAD DEFAULT
SKIPE T3,.MPSPN(T2) ;GET STARTING PAGE NUMBER
JRST DATI.2 ;GOT SOMETHING
MOVEI T3,HGHPAG ;GET HIGHEST PAGE TO USE
SUBI T3,(T1) ;T2:= STARTING PAGE NUMBER
DATI.2: MOVEM T1,MAPDAT+.MPPGS ;SAVE FOR CURIOUS PROGRAMS
MOVEM T1,PAGCNT ;SAVE PAGE COUNT
MOVEM T3,MAPDAT+.MPCPN ;SAVE FOR CURIOUS PROGRAMS
SKIPGE T1,.MPDSN(T2) ;GET DEFAULT SECTION NUMBER
MOVEI T1,0 ;ASSUME ZERO IF CALLER IS STUPID
MOVEM T1,MAPDAT+.MPSEC ;SAVE IT
JRST CPOPJ1 ;RETURN
; See if we can SPY and if it's required
;
SPYCHK: MOVEM F,MAPFLG ;SAVE THE FLAGS
AOS MAPDAT+.MPSPY ;ASSUME IT'S ALL GONNA WORK
TLO F,FL.SPY ;CHEAT AND PRETEND WE CAN SPY
MOVEI T1,0 ;AN ADDRESS TO LOOK AT
PUSHJ P,PADDRESS ;LOAD IT INTO THE CACHE
SKIPA F,MAPFLG ;CAN'T
JRST CPOPJ1 ;GUESS WE CAN SPY
SETZM MAPDAT+.MPSPY ;SO THE CALLER KNOW WHATS GOING ON
TLZE F,FL.SPY ;DO WE NEED TO SPY?
ERR. (ECS,CPOPJ) ;YES--AND WE CAN'T DO IT!
JRST CPOPJ1 ;RETURN
; Determine the environment for GETTABing. This routine will try
; to figure out the CPU and paging type by looking at the Exec Data
; Vector and other data. If sucessful, some basic GETTABs will be
; performed for use later during GETTAB simulation.
;
GTBINI: TLNE F,FL.PPM ;PHYSICAL PAGE MAPPING?
POPJ P, ;THEN GETTABS ARE MEANINGLESS
SETZM HGHUEA ;DON'T KNOW THIS ONE YET
PJOB T1, ;GET OUR JOB NUMBER
MOVEM T1,USRJOB ;SAVE IT
SETZ T2, ;INIT INDEX
GTBI.1: MOVE T1,GTBEXT+0(T2) ;GET LOCATION
SKIPE GTBEXT+1(T2) ;HAVE AN OFFSET?
ADD T1,@GTBEXT+1(T2) ;YES--ADD IT IN
PUSHJ P,PEXAMINE ;GET C(T1)
JRST GTBI.2 ;CAN'T
MOVEM T1,@GTBEXT+2(T2) ;STORE RESULT
ADDI T2,3 ;ACCOUNT FOR THREE WORD ENTRIES
CAIGE T2,GTBEXL ;OFF THE END OF THE TABLE?
JRST GTBI.1 ;NO--LOOP
HLRZ T1,EDVCNT ;GET EDV CODE
HRRZ T2,EDVCNT ;GET WORD COUNT
CAIN T1,'EDV' ;LOOKING AT AN EDV?
CAIGE T2,.EDEPT ;AND DOES THIS EDV CONTAIN NEEDED DATA?
JRST GTBI.2 ;NO
MOVE T1,EDVDAT ;GET FLAGS AND CPU DATA
TLNE T1,(ED.KLP) ;THIS A KL PAGING MACHING?
SETOM KLPFLG ;YES
HRRZM T1,MAPDAT+.MPCPU ;SAVE CPU TYPE
JRST GTBI.3 ;GO CHECKOUT THE PAGING
; Determine the CPU type. Here if the EDV contains junk or unreasonable
; data. We know at this point that the monitor is pre-702 because the EDV
; is invalid. This implies that the first 112K of the monitor is unmapped
; (KA10 or KI10), or mapped one-for-one virtual-to-physical (KL10).
;
GTBI.2: MOVE T1,[%CCTYP] ;ARGUMENT TO RETURN CPU TYPE
PUSHJ P,GTBFRC ;TRY THE BRUTE FORCE METHOD
POPJ P, ;CAN'T
MOVEM T1,MAPDAT+.MPCPU ;SAVE IT
SETZM EPTADR ;DON'T BELEIVE THE EPT ADDRESS
SETZM KLPFLG ;CLEAR THE KL PAGING FLAG
; Get the paging type
;
GTBI.3: SKIPN T1,MAPDAT+.MPCPU ;GET CPU TYPE CODE
POPJ P, ;UNKNOWN CPU TYPE
MOVEI T2,.KARPR ;KA RELOCATION AND PROTECTION REGISTERS
CAIE T1,.PDP6 ;CP166 CPU?
CAIN T1,.KA10 ;KA10 CPU?
JRST GTBI.4 ;YES TO EITHER
CAIE T1,.KI10 ;A KI10 CPU?
SKIPN KLPFLG ;WHAT KIND OF PAGING?
SKIPA T2,[.KIPAG] ;KI10
MOVEI T2,.KLPAG ;KL10
CAIN T1,.KC10 ;KC10 CPU?
MOVEI T2,.KCPAG ;A DIFFERENT FLAVOR OF KL PAGING
GTBI.4: MOVEM T2,MAPDAT+.MPPAG ;SAVE PAGING TYPE
SKIPLE EPTADR ;HAVE AN EDV?
JRST GTBI.5 ;YES--MUST ASSUME THE EPT IS OK
MOVE T1,[%CCTOS] ;ARGUMENT TO RETURN THE EPT ADDRESS
PUSHJ P,GTBFRC ;TRY TO GET IT
POPJ P, ;LOSE
MOVEM T1,EPTADR ;SET IT
JRST GTBI.5 ;GO DO SOME BASIC GETTABS
; Do some basic GETTABs needed later for GETTAB simulation
;
GTBI.5: TLO F,FL.GTS ;LET GTBSIM DO IT'S STUFF
SETZ T4, ;CLEAR INDEX
GTBI.6: MOVE T1,GTBGTT+0(T4) ;GET A GETTAB ARGUMENT
PUSHJ P,GTBSIM ;SIMULATE A GETTAB
XCT GTBGTT+1(T4) ;DEFAULT VALUE OR RETURN
XCT GTBGTT+2(T4) ;SAVE VALUE
ADDI T4,2 ;ACCOUNT FOR THREE WORD ENTRIES
CAIGE T4,GTBGTL-1 ;END OF THE TABLE?
AOJA T4,GTBI.6 ;NO--LOOP
MOVMS SEGN ;MAKE SEGN POSITIVE
MOVE T1,JOBN ;GET THE NUMBER OF JOBS
ADDM T1,SEGN ;ADD TO TOTAL OF SEGMENTS
; Here to see if the monitor's high segment is mapped yet. We GETTAB
; the system uptime. If it's not equal to zero, then the monitor
; probably ran for some amount of time and the high segment must have
; been mapped.
;
GTBI.7: MOVE T1,[%CNSUP] ;SYSTEM UPTIME IN TICS
PUSHJ P,GTBFRC ;READ FROM MONITOR/.EXE FILE
SETZ T1, ;CAN'T READ, ASSUME NOT "MAPPED"
MOVEM T1,HIFLAG ;IF .NE. 0 THEN "HISEG MAPPED"
POPJ P, ;RETURN
; Here to do a GETTAB by the brute force method
;
GTBFRC: SKIPE HGHUEA ;KNOW THIS ADDR YET?
JRST GTBF.1 ;YES
MOVEI T2,DEFUEA ;GET DEFAULT HIGHEST UNMAPPED ADDR
MOVEM T2,HGHUEA ;SAVE TO WE DON'T DO PHYSICAL MAPPING
PUSHJ P,GTBF.1 ;DO THE GETTAB
SKIPA ;FAILED
AOS (P) ;SKIP
SETZM HGHUEA ;PUT BACK THE WAY WE FOUND IT
POPJ P, ;AND RETURN
GTBF.1: TLO F,FL.GTS ;ALLOW GTBSIM TO DO ITS STUFF
PUSHJ P,GTBSIM ;TRY THE GETTAB
POPJ P, ;FAILED
JRST CPOPJ1 ;RETURN
; Here when we can't determine how to do GETTABs
;
GTBI.E: TLZ F,FL.GTS ;COULDN'T SETUP GETTAB SIMULATION
POPJ P, ;RETURN
; Table of locations, offsets, and storage words
;
GTBEXT: EXP ABSTAB,000000,NUMTAB ;TABLE OF GETTAB TABLE POINTERS
EXP .JBEDV,000000,EDVADR ;EDV ADDRESS
EXP .EDCNT,EDVADR,EDVCNT ;EDV CODE AND WORD COUNT
EXP .EDDAT,EDVADR,EDVDAT ;FLAGS AND CPU DATA
EXP .EDEPT,EDVADR,EPTADR ;EPT ADDRESS
EXP .EDSPT,EDVADR,SPTADR ;SPT ADDRESS
GTBEXL==<.-GTBEXT> ;LENGTH OF TABLE
; Table of GETTAB arguments, defaults, and storage words
;
GTBGTT:
EXP <%VMHUA>,<MOVEI T1,DEFUEA>,<MOVEM T1,HGHUEA>;HIGHEST UNMAPPED EXEC ADDRESS
EXP <%VMPPB>,<MOVEI T1,DEFPBA>,<MOVEM T1,PPABEG>;BEGINING PER-PROCESS ADDRESS
EXP <%VMPPE>,<MOVEI T1,DEFPEA>,<MOVEM T1,PPAEND>;END PER-PROCESS ADDRESS
EXP <%CNSJN>,<POPJ P,>,<HRRZM T1,JOBN> ;HIGHEST LEGAL JOB
EXP <%CNSJN>,<POPJ P,>,<HLREM T1,SEGN> ;HIGHEST LEGAL SEGMENT
EXP <%CNPDB>,<POPJ P,>,<HRRZM T1,JBTPDB> ;JBTPDB POINTER
EXP <%CNVSH>,<MOVEI T1,DEFORG>,<MOVEM T1,HIORG> ;HIGH SEGMENT ORIGIN
EXP <.GTSGN,,.GTSLF>,<POPJ P,>,<HRRZM T1,JBTSGN>;JBTSGN POINTER
EXP <.GTIDX,,.GTSLF>,<POPJ P,>,<HRRZM T1,RNGTAB>;RNGTAB POINTER
EXP <.GTADR,,.GTSLF>,<POPJ P,>,<HRRZM T1,JBTADR>;JBTADR POINTER
EXP <.GTUPM,,.GTSLF>,<POPJ P,>,<HRRZM T1,JBTUPM>;JBTUPM POINTER
GTBGTL==.-GTBGTT ;LENGTH OF TABLE
SUBTTL .MAPJ - JOBPEK UUO simulation
; Simulate the JOBPEK UUO by by actually tracing down section and
; page maps for all types of paging.
; Call: MOVE .AP, argument address
; PUSHJ P,.MAPJ
; <NON-SKIP> ;FAILED
; <SKIP> ;SUCEEDED
;
; Arg + 0/ <flags>B9+<job>B17+<wordcount>B35
; Arg + 1/ read address,,write address
;
; All legal JOBPEK flags are valid
;
.MAPJ:: PUSHJ P,CONTXT ;CONTEXT SWITCH
MOVE T2,USRACS+.AP ;GET ARG POINTER
HRRZ T3,F ;GET MAPPING CODE
CAIN T3,.MPMON ;MAPPING THE RUNNING MONITOR?
TLNN F,FL.JRM ;JOBPEK UUOS ON THE RUNNING MONITOR?
SKIPA T1,.MPFNC(T2) ;NO--GET FLAG WORD
JRST [JOBPEK T2, ;DO THE UUO
ERR. (JRW,CPOPJ) ;JOBPEK FAILED TO READ/WRITE JOB
AOS MAPDAT+.MPJPU ;COUNT THE JOBPEK UUO EXECUTION
JRST CPOPJ1] ;RETURN
MOVEM T1,JPKFLG ;SAVE
HRRZM T1,CPYBLK+.CBWCT ;SAVE WORD COUNT
HLRZ T1,1(T2) ;GET THE READ ADDRESS
MOVEM T1,CPYBLK+.CBRAD ;SAVE IT
HRRZ T1,1(T2) ;GET THE WRITE ADDRESS
MOVEM T1,CPYBLK+.CBWAD ;SAVE IT
PUSHJ P,JPKSIM ;SIMULATE A JOBPEK UUO
POPJ P, ;CAN'T
JRST CPOPJ1 ;AND RETURN
; Here on internal calls
;
JPKSIM: MOVE T1,JPKFLG ;GET FLAG WORD
TLNE T1,(JK.UPM) ;READ A UPMP?
JRST JPKUPM ;YES
TLNE T1,(JK.EVA) ;READ EVM?
JRST JPKEVA ;YES
JRST JPKRED ;GO READ
; All sucessful JOBPEK code should exit through here
;
JPKXIT: AOS MAPDAT+.MPJPK ;COUNT THE JOBPEK SIMULATION
JRST CPOPJ1 ;RETURN
; JOBPEK read
;
JPKRED: LDB T1,[POINT 9,JPKFLG,17] ;GET JOB NUMBER
PUSHJ P,PHYUPT ;GET UPT ADDRESS
POPJ P, ;CAN'T
MOVE VMA,CPYBLK+.CBRAD ;GET READ ADDRESS
PUSHJ P,PHYADR ;MAKE IT ADDRESSIBLE
ERR. (JNA,CPOPJ) ;JOB NOT ADDRESSABLE
MOVEM PMA,CPYBLK+.CBRAD ;SAVE READ ADDRESS
MOVEI T1,CPYBLK ;POINT TO COPY BLOCK
PUSHJ P,ADRCPY ;MOVE SOME DATA
SKIPE .CBWCT(T1) ;MORE WORDS TO PROCESS?
JRST JPKRED ;YES--LOOP BACK FOR MORE
JRST JPKXIT ;FINISH UP
; JOBPEK UPMP read
;
JPKUPM: TLNE T1,(JK.WRT) ;WANT TO WRITE THE UPMP?
ERR. (IWU,CPOPJ) ;ILLEGAL TO WRITE THE UPMP
HLRZS T1 ;GET HALF WORD WITH JOB NUMBER
ANDI T1,777 ;KEEP JUST THE JOB NUMBER
PUSHJ P,PHYUPT ;GET THE UPT ADDRESS
POPJ P, ;CAN'T
MOVE T1,PMA ;GET UPMP ADDRESS
PUSHJ P,PADDRESS ;MAKE IT ADDRESSABLE
ERR. (JNA,CPOPJ) ;JOB NOT ADDRESSABLE
MOVEM T1,CPYBLK+.CBRAD ;SAVE READ ADDRESS
MOVEI T1,CPYBLK ;POINT TO COPY BLOCK
PUSHJ P,ADRCPY ;MOVE SOME DATA
SKIPE .CBWCT(T1) ;MORE WORDS TO PROCESS?
JRST JPKUPM ;YES--LOOP BACK FOR MORE
JRST JPKXIT ;FINISH UP
; JOBPEK exec virtual address read
;
JPKEVA: TLNE T1,(JK.WRT) ;WANT TO WRITE EVM?
ERR. (IWE,CPOPJ) ;ILLEGAL TO WRITE EVM
JPKE.1: LDB T1,[POINT 9,JPKFLG,17] ;GET JOB WE'RE GONNA LOOK AT
PUSHJ P,PHYUPT ;GET IT'S UPT ADDRESS
POPJ P, ;CAN'T
MOVE VMA,CPYBLK+.CBRAD ;GET ADDRESS TO CONVERT
PUSHJ P,PHYFUN ;COMPUTE MAPPED PHYSICAL FUNNY ADDRESS
POPJ P, ;CAN'T
MOVEM PMA,CPYBLK+.CBRAD ;SAVE READ ADDRESS
MOVEI T1,CPYBLK ;POINT TO COPY BLOCK
PUSHJ P,ADRCPY ;MOVE SOME DATA
SKIPE .CBWCT(T1) ;MORE WORDS TO PROCESS?
JRST JPKE.1 ;YES--LOOP BACK FOR MORE
JRST JPKXIT ;FINISH UP
SUBTTL Address mapping -- Compute a mapped address
; Call: MOVE T1, address
; PUSHJ P,ADDRESS
; <return>
;
PADDRESS:TLOA F,FL.TPP ;ALLOW PHYSICAL PAGE MAPPING
VADDRESS:TLZ F,FL.TPP ;ALLOW VIRTUAL PAGE MAPPING
ADDRESS:TLZE T1,400000 ;CLEAR "SECTION RELATIVE" REFERENCES
HRL T1,MAPDAT+.MPSEC ;LOAD DEFAULT SECTION NUMBER
TLNN F,FL.SPY ;CAN WE SPY?
ERR. (ECS,CPOPJ) ;NO
TLNN F,FL.PPM!FL.TPP ;PHYSICAL PAGE MAPPING?
PUSHJ P,@CVTTAB(F) ;SEE IF NECESSARY TO CONVERT ADDRESS
JRST ADDR.1 ;NO ADDRESS FIXUP NECESSARY
PUSHJ P,SAVEF ;SAVE F
PUSHJ P,PHYEPT ;GET PHYSICAL EPT ADDRESS
POPJ P, ;CAN'T
MOVE VMA,T1 ;GET ADDRESS TO CONVERT
PUSHJ P,PHYADR ;COMPUTE MAPPED PHYSICAL ADDRESS
POPJ P, ;CAN'T
MOVE T1,PMA ;GET ADDRESS OF MAPPED PHYSICAL ADDRESS
AOS MAPDAT+.MPADR ;COUNT ADDRESS COMPUTATIONS
JRST CPOPJ1 ;AND RETURN
ADDR.1: MOVE A1,T1 ;GET ADDRESS TO MAP
LSH A1,-11 ;CONVERT TO A PAGE NUMBER
PUSHJ P,CSHFND ;SEE IF PAGE IN CACHE
JRST ADDR.2 ;NOT FOUND
PUSHJ P,CSHMRU ;MOVE TO TOP OF LIST
JRST ADDR.4 ;ONWARD
ADDR.2: PUSHJ P,CSHINS ;INSERT PAGE IN CACHE
MOVSI A3,(CB.CRE) ;GET A BIT
TDNN A3,.CBFLG(A2) ;PAGE ALREADY EXIST?
JRST ADDR.3 ;NO
PUSHJ P,@DESTAB(F) ;DESTROY THE PAGE
POPJ P, ;CAN'T
AOS MAPDAT+.MPPGD ;COUNT PAGE DESTROY
ADDR.3: MOVE A1,T1 ;GET ADDRESS WE'RE GOING TO MAP
LSH A1,-11 ;KEEP JUST THE PAGE NUMBER
MOVEM A1,.CBPRC(A2) ;STORE NEW PROCESS PAGE NUMBER
PUSHJ P,@CRETAB(F) ;CREATE THE PAGE
POPJ P, ;CAN'T
AOS MAPDAT+.MPPGC ;COUNT PAGE CREATE
ADDR.4: MOVE A1,.CBUSR(A2) ;GET USER PAGE NUMBER
LSH A1,11 ;CONVERT TO AN ADDRESS
ANDI T1,PAGSIZ-1 ;KEEP JUST THE OFFSET INTO THE PAGE
IOR T1,A1 ;FORM THE MAPPED ADDRESS
AOS MAPDAT+.MPADR ;COUNT ADDRESS COMPUTATIONS
JRST CPOPJ1 ;AND RETURN
SUBTTL Address mapping -- Convert virtual to physical addresses
; Convert an exec virtual "funny" address to a mapped physical address
; Call: MOVE PMA, physcial address of UPT
; MOVE VMA, exec virtual "funny" address
; PUSHJ P,PHYFUN
; <NON-SKIP> ;FAILED
; <SKIP> ;PMA:= MAPPED PHYSICAL ADDRESS
;
PHYFUN: CAML VMA,PPABEG ;RANGE CHECK IT
CAML VMA,PPAEND ;MUST BE A "FUNNY PAGE" ADDRESS
ERR. (IAD,CPOPJ) ;ILLEGAL ADDRESS
MOVEM T1,PAGFUN ;SAVE T1
MOVE T1,MAPDAT+.MPPAG ;GET PAGING TYPE
MOVE T1,FUNTAB-1(T1) ;GET FUNNY PAGE POINTER OFFSET IN UPT
EXCH T1,PAGFUN ;SAVE IT AND RESTORE T1
JRST PHYCOM ;ENTER COMMON PHYSICAL ADDRESS CODE
; KA rel/prot: No per-process space to map.
; KI paging: The pointer to the first age of funny space (340) comes
; immediately after the pointer for the user's page 777.
; KL paging: The ADDI T1,SECTAB(T4) has to be cancelled, since
; the pointer to page 340 is the 340th word in the
; UPT. TOPS-10 changes the first (and only) word of
; the SPT to contain the address of the UPT whenever
; a context switch occurs.
FUNTAB: EXP 0 ;KA RELOCATION AND PROTECTION REGISTERS
EXP <777+1>-340 ;KI PAGING ON A KI10, KL10 OR KS10
EXP -SECTAB ;KL PAGING ON A KL10 OR KS10
EXP -SECTAB ;KL PAGING ON A KC10
; Convert a virtual address to a mapped physical address
; Call: MOVE PMA, physical address of EPT or UPT
; MOVE VMA, virtual address
; PUSHJ P,PHYADR
; <NON-SKIP> ;FAILED
; <SKIP> ;PMA:= MAPPED PHYSICAL ADDRESS
;
PHYADR: SETZM PAGFUN ;CLEAR FUNNY PAGE UPT OFFSET
PHYCOM: PUSHJ P,SAVT4 ;SAVE T1, T2, T3, AND T4
MOVE T1,PMA ;GET EPT OR UPT ADDRESS
MOVE T2,VMA ;GET VIRTUAL ADDRESS TO CONVERT
MOVE T3,T2 ;COPY ADDRESS
LSH T3,-11 ;CONVERT TO PAGE NUMBER
MOVE T4,MAPDAT+.MPPAG ;GET PAGING TYPE
PUSHJ P,@PHYTAB-1(T4) ;DISPATCH TO THE PROPER PAGING ROUTINES
POPJ P, ;CAN'T CONVERT VRT TO PHY ADDRESS
MOVE PMA,T1 ;GET PHYSICAL ADDRESS
JRST CPOPJ1 ;AND RETURN
PHYTAB: EXP KARPR ;KA RELOCATION AND PROTECTION REGISTERS
EXP KIPAG ;KI PAGING ON A KI10, KL10 OR KS10
EXP KLPAG ;KL PAGING ON A KL10 OR KS10
; EXP KCPAG ;KL PAGING ON A KC10
; Return the physical address of the boot CPU's EPT
; Call: PUSHJ P,PHYEPT
; <NON-SKIP> ;FAILED
; <SKIP> ;PMA:= PHYSICAL ADDRESS, SPT:= SPT BASE
;
PHYEPT: MOVE PMA,EPTADR ;GET THE EPT ADDRESS
MOVE SPT,PMA ;HACK FOR TOPS-10 ONE WORD SPT
TLO F,FL.EPM ;FLAG EXEC MAPPING TO TAKE PLACE
JRST CPOPJ1 ;RETURN
; Return the physical address of a UPT
; Call: MOVE T1, job number
; PUSHJ P,PHYUPT
; <NON-SKIP> ;FAILED
; <SKIP> ;PMA:= PHYSICAL ADDRESS, SPT:= SPT BASE
;
PHYUPT: CAMLE T1,JOBN ;RANGE CHECK
ERR. (IJN,CPOPJ) ;ILLEGAL JOB NUMBER
PUSHJ P,SAVT1 ;SAVE T1
ADD T1,JBTUPM ;OFFSET TO THE JOB'S UPMP ENTRY
PUSHJ P,EXAMINE ;READ IT
ERR. (JNA,CPOPJ) ;JOB NOT ADDRESSABLE
HRRZ PMA,T1 ;UPMP PAGE NUMBER IS A RH QUANTITY
JUMPE PMA,[ERR. (JSO,CPOPJ)] ;JOB SWAPPED OUT
LSH PMA,11 ;CONVERT TO AN ADDRESS
MOVE SPT,PMA ;HACK FOR TOPS-10 ONE WORD SPT
JRST CPOPJ1 ;AND RETURN
SUBTTL Address mapping -- Copy a block of mapped data
; Copy a mapped block of data
; Call: MOVE T1, copy-block-address
; PUSHJ P,ADRCPY
;
ADRCPY: SKIPN A1,.CBWCT(T1) ;GET NUMBER OF WORDS TO MOVE
POPJ P, ;NOTHING TO DO
CAIG A1,2 ;MOVING A WORD OR TWO?
JRST @[EXP ADRC.1 ;1 WORD
EXP ADRC.2]-1(A1) ;2 WORDS
JRST ADRC.3 ;MORE THAN 2 WORDS
ADRC.1: MOVE A2,@.CBRAD(T1) ;GET A WORD
MOVEM A2,@.CBWAD(T1) ;PUT A WORD
JRST ADRC.4 ;UPDATE ADDRESSES AND RETURN
ADRC.2: MOVE A2,.CBRAD(T1) ;GET ADDRESS
ADDI A2,1 ;PLUS ONE
TRNN A2,PAGSIZ-1 ;OVERFLOW TO THE NEXT PAGE?
SOJA A1,ADRC.1 ;YES--JUST MOVE A SINGLE WORD
DMOVE A2,@.CBRAD(T1) ;GET TWO WORDS
DMOVEM A2,@.CBWAD(T1) ;PUT TWO WORDS
JRST ADRC.4 ;UPDATE ADDRESSES AND RETURN
ADRC.3: HRLZ A2,.CBRAD(T1) ;GET READ ADDRESS
HRR A2,.CBWAD(T1) ;GET WRITE ADDRESS
MOVE A3,.CBRAD(T1) ;GET READ ADDRESS AGAIN
ADDI A3,PAGSIZ ;ROUND UP A PAGE
TRZ A3,PAGSIZ-1 ; BUT NOT BEYOND A PAGE BOUNDRY
SUB A3,.CBRAD(T1) ;GET MAXIMUM WORDS WE CAN BLT
CAMLE A3,A1 ;TRYING TO MOVE TOO MANY WORDS?
SKIPA A3,A1 ;YES--ONLY COPY AS MANY AS REQUESTED
MOVE A1,A3 ;MAKE SURE THE COUNTS AGREE
ADD A3,.CBWAD(T1) ;COMPUTE LAST ADDRESS +1
BLT A2,-1(A3) ;COPY DATA
ADRC.4: EXCH A1,.CBWCT(T1) ;SWAP WORDS XFERED AND REQUESTED NUMBER
SUBM A1,.CBWCT(T1) ;UPDATE COUNT
ADDM A1,.CBRAD(T1) ;ADJUST SOURCE ADDRESS
ADDM A1,.CBWAD(T1) ;ADJUST DESTINATION ADDRESS
POPJ P, ;RETURN
SUBTTL Address mapping -- KA relocation and protection
KARPR: MOVE T3,T1 ;SAVE THE JOB NUMBER
ADD T1,JBTADR ;OFFSET INTO THE RELOC AND PROT TABLE
TLNN T2,777777 ;256K ADDRESS LIMITATION ON A KA10
PUSHJ P,EXAMINE ;READ THE ENTRY FOR JOB'S LOW SEGMENT
ERR. (JNA,CPOPJ) ;JOB NOT ADDRESSABLE
HLRZ T4,T1 ;GET PROTECTION
CAMG T2,T4 ;WITHIN THE LOW SEGMENT?
JRST KARPR3 ;YES
KARPR1: SKIPN T1,JBTUPM ;HAVE THIS TABLE?
JRST KARPR2 ;NO
ADD T1,T3 ;INDEX TO THE LOW SEG ENTRY
ADD T1,JOBN ;INDEX TO THE HIGH SEG ENTRY
PUSHJ P,EXAMINE ;READ THAT WORD
SETZ T1, ;CAN'T
JUMPE T1,[ERR. (JNA,CPOPJ)] ;JOB NOT ADDRESSABLE
HLRZ T4,T1 ;GET THE HIGH SEGMENT ORIGIN
TRZA T4,PAGSIZ-1 ;CLEAR ANY JUNK
KARPR2: MOVEI T4,400000 ;USE DEFAULT HIGH SEG ORIGIN
MOVE T1,T3 ;GET THE JOB NUMBER BACK AGAIN
ADD T1,JBTADR ;OFFSET INTO THE RELOC AND PROT TABLE
ADD T1,JOBN ;PLUS JOBN TO GET SEGMENT ENTRY
PUSHJ P,EXAMINE ;READ THE ENTRY FOR JOB'S HIGH SEGMENT
ERR. (JNA,CPOPJ) ;JOB NOT ADDRESSABLE
HLRZ T3,T1 ;GET HIGH SEGMENT LENGTH (PROTECTION)
ADDI T3,(T4) ;COMPUTE THE END OF THE SEGMENT
CAMG T2,T3 ;ADDRESS WITHIN THE BOUNDS
CAMGE T2,T4 ; OF THE HIGH SEGMENT?
ERR. (IAD,CPOPJ) ;ILLEGAL ADDRESS
SKIPA ;JOIN COMMON CODE
KARPR3: MOVEI T4,0 ;LOW SEG ORIGIN IS ZERO
TLZ T1,777777 ;KEEP ONLY PHYSICAL RELOCATION ADDRESS
SUB T2,T4 ;SUBTRACT SEGMENT ORIGIN
ADDI T1,(T2) ;OFFSET TO DESIRED VIRTUAL ADDRESS
PUSHJ P,PADDRESS ;MAKE IT ADDRESSIBLE
ERR. (JNA,CPOPJ) ;JOB NOT ADDRESSABLE
JRST CPOPJ1 ;AND RETURN
SUBTTL Address mapping -- KI paging
KIPAG: TLZN F,FL.EPM ;DOING EXEC PHYSICAL MAPPING?
JRST KIPAG1 ;NO--UPMP DECODING
CAIGE T2,^D112*^D1024 ;IS THE ADDRESS IN THE LOWER 112K?
JRST KIPAG2 ;YES--THAT'S EASY
CAIGE T2,^D128*^D1024 ;BETTER NOT BE IN FUNNY SPACE
ERR. (IAD,CPOPJ) ;BECAUSE THATS AN ILLEGAL ADDRESS
KIPAG1: LDB T3,[POINT 9,T2,26] ;GET THE TARGET PAGE NUMBER
ADD T3,PAGFUN ;INCLUDE FUNNY PAGE OFFSET (IF ANY)
LSHC T3,-1 ;DIVIDE BY TWO
ADDI T1,(T3) ;COMPUTE UPMP INDEX
PUSHJ P,PEXAMINE ;READ THE UPMP ENTRY FOR THAT PAGE
ERR. (JNA,CPOPJ) ;JOB NOT ADDRESSABLE
TLNN T4,400000 ;ODD PAGE?
MOVSS T1 ;NO--SWAP HALVES SO LDB GETS RIGHT PAGE
LDB T1,[POINT 13,T1,35] ;GET PAGE NUMBER OF TARGET PAGE
LSH T1,11 ;CONVERT TO AN ADDRESS
TDZA T2,[-1-<PAGSIZ-1>] ;GET OFFSET INTO THE PAGE
KIPAG2: SKIPA T1,T2 ;GET PHYSICAL EXEC ADDRESS
ADDI T1,(T2) ;COMPUTE PHYSICAL TARGET ADDRESS
PUSHJ P,PADDRESS ;MAKE IT ADDRESSIBLE
ERR. (IAD,CPOPJ) ;ILLEGAL ADDRESS
JRST CPOPJ1 ;AND RETURN
SUBTTL Address mapping -- KL paging
KLPAG: MOVNI T4,2 ;GET INITIAL VALUE FOR POINTER FLAG
MOVEM T4,PAGFLG ;SET IT
HLRZ T4,T2 ;GET SECTION NUMBER
CAILE T4,MXSECN ;RANGE CHECK SECTION NUMBER
ERR. (IAD,CPOPJ) ;ILLEGAL ADDRESS
ADDI T1,SECTAB(T4) ;INDEX INTO SECTION MAP POINTERS
SKIPN T4,PAGFUN ;HAVE A FUNNY PAGE OFFSET?
JRST KLPAGM ;NO--ONWARD
ADD T1,PAGFUN ;INCLUDE FUNNY PAGE OFFSET (IF ANY)
ADDI T1,(T3) ;AND OFFSET BY THE FUNNY PAGE NUMBER
SETZ T3, ;SO WE DON'T DO USE IT TWICE
AOS PAGFLG ;SAY WE'RE POINTING TO A PAGE MAP NOW
; Decode a map entry
; If PAGFLG = -2, T1 has addr in the section map part of EPT/UPT
; If PAGFLG = -1, T1 has addr of entry in the page map for this section
; If PAGFLG = 0, T1 had the mapping for the page in question
;
; T2 has virtual address
; T3 has virtual page number
;
KLPAGM: PUSHJ P,PADDRESS ;COMPUTE THE ADDRESS OF A MAP ENTRY
ERR. (JNA,CPOPJ) ;JOB NOT ADDRESSABLE
AOSLE PAGFLG ;FLAG WHAT WE'RE LOOKING AT
JRST KLPAGX ;FOUND THE PAGE WE'RE LOOKING FOR
LDB T4,[POINT 3,(T1),2] ;GET THE ENTRY TYPE
JRST @KLPAGT(T4) ;DISPATCH BASED ON POINTER TYPE
KLPAGT: EXP KLPAG0 ;(0) NO ACCESS
EXP KLPAG1 ;(1) IMMEDIATE
EXP KLPAG2 ;(2) SHARED
EXP KLPAG3 ;(3) INDIRECT
EXP KLPAGE ;(4) ILLEGAL
EXP KLPAGE ;(5) ILLEGAL
EXP KLPAGE ;(6) ILLEGAL
EXP KLPAGE ;(7) ILLEGAL
KLPAGX: ANDI T2,PAGSIZ-1 ;GET JUST THE INDEX INTO THE PAGE
ADDI T1,(T2) ;GET TARGET ADDRESS TO EXAMINE
JRST CPOPJ1 ;RETURN
KLPAGE: ERR. (UPC,CPOPJ) ;UNIMPLEMENTED KL PAGING CODE
; KL paging code 0 - No access
;
KLPAG0: ERR. (NAP,CPOPJ) ;NO ACCESS TO REQUESTED PAGE
; KL paging code 1 - Immediate
;
KLPAG1: MOVE T1,(T1) ;GET POINTER
TLNE T1,77 ;STORAGE MEDIUM NON-ZERO? (TOPS20)
ERR. (PNC,CPOPJ) ;PAGE NOT IN CORE
ANDI T1,17777 ;KEEP JUST THE PAGE MAP PAGE NUMBER
LSH T1,11 ;CONVERT TO AN ADDRESS
SKIPN PAGFLG ;POINTING TO A PAGE MAP FOR A SECTION?
JRST KLPAGM ;NO--LOOP BACK AND DECODE MAP POINTER
ANDI T3,777 ;KEEP ONLY RELATIVE PAGE # IN SECTION
ADDI T1,(T3) ;INDEX INTO PAGE MAP FOR TARGET PAGE
SETZ T3, ;CLEAR FOR NEXT TIME
JRST KLPAGM ;LOOP BACK AND DECODE MAP POINTER
; KL paging code 2 - Shared
;
KLPAG2: HRRZ T1,(T1) ;GET INDEX INTO THE SPT
CAIE T1,0 ;RANGE CHECK
ERR. (SIR,CPOPJ) ;SPT INDEX OUT OF RANGE
ADD T1,SPT ;OFFSET
SETOM PAGFLG ;STILL LOOKING AT A PAGE MAP
JRST KLPAGM ;LOOP BACK AND DECODE MAP POINTER
; KL paging code 3 - Indirect
;
KLPAG3: LDB T4,[POINT 9,(T1),17] ;GET INDEX INTO SECONDARY PAGE MAP
HRRZ T1,(T1) ;GET INDEX INTO THE SPT
CAIE T1,0 ;RANGE CHECK
ERR. (SIR,CPOPJ) ;SPT INDEX OUT OF RANGE
ADD T1,SPT ;OFFSET
ADDI T1,(T4) ;OFFSET INTO THE SECONDARY PAGE MAP
SETOM PAGFLG ;STILL LOOKING AT A PAGE MAP
JRST KLPAGM ;LOOP BACK AND DECODE MAP POINTER
SUBTTL Address mapping -- Dispatch tables
; Initialization
;
INITAB: EXP MONINI ;MONITOR
EXP JOBINI ;JOB
EXP FILINI ;FILE
; Page creation
;
CRETAB: EXP MONCRE ;MONITOR
EXP JOBCRE ;JOB
EXP FILCRE ;FILE
; Page destruction
;
DESTAB: EXP MONDES ;MONITOR
EXP JOBDES ;JOB
EXP FILDES ;FILE
; Deposit
;
DEPTAB: EXP MONDEP ;MONITOR
EXP JOBDEP ;JOB
EXP FILDEP ;FILE
; Mapping code names
;
CODTAB: [ASCIZ |monitor|] ;MONITOR
[ASCIZ |job|] ;JOB
[ASCIZ |file|] ;FILE
; Convert virtual to physical address
;
CVTTAB: EXP MONCVT ;MONITOR
EXP JOBCVT ;JOB
EXP FILCVT ;FILE
SUBTTL Address mapping -- Monitor
; Here at initialization to setup the page tables
;
MONINI: TLNE F,FL.EXE ;CHECK FOR ILLEGAL FLAGS
ERR. (CMF,CPOPJ) ;CONFLICTING MAPPING CODE AND FLAGS
JRST CPOPJ1 ;RETURN
; Here to create a SPY page
; Call: MOVE A2, cache chunk address
; PUSHJ P,MONCRE
; <NON-SKIP> ;SPY PAGE CREATE FAILED
; <SKIP> ;PAGE CREATED
;
MONCRE: PUSHJ P,SAVT2 ;SAVE T1 AND T2
MOVE T1,.CBPRC(A2) ;GET PROCESS PAGE NUMBER TO MAP
MOVE T2,.CBUSR(A2) ;GET USER PAGE NUMBER TO MAP INTO
PUSHJ P,PAGSPY ;CREATE A SPY PAGE
POPJ P, ;CAN'T
MOVE T1,.CBFLG(A2) ;GET FLAGS
TLO T1,(CB.CRE) ;PAGE WAS JUST CREATED
TLNE F,FL.PPM!FL.TPP ;PHYSICAL PAGE MAPPING?
TLO T1,(CB.PHY) ;YES
MOVEM T1,.CBFLG(A2) ;UPDATE FLAGS
JRST CPOPJ1 ;RETURN
; Here to destroy a page
; Call: MOVE A2, cache chunk address
; PUSHJ P,MONDES
; <NON-SKIP> ;DESTROY FAILED
; <SKIP> ;USER PAGE DESTROYED
;
MONDES: PUSHJ P,SAVT2 ;VE T1 AND T2
MOVSI T2,(CB.CRE) ;GET PAGE CREATED BIT
TDNN T2,.CBFLG(A2) ;HAVE A PAGE THERE?
POPJ P, ;NO
MOVE T1,.CBUSR(A2) ;GET THE USER PAGE NUMBER
PUSHJ P,PAGDES ;DESTROY IT
POPJ P, ;CAN'T
MOVSI T2,(CB.CRE!CB.PHY) ;GET SOME BITS
ANDCAM T2,.CBFLG(A2) ;CLEAR THEM
JRST CPOPJ1 ;RETURN
; Here to deposit a word in the running monitor. The arguments are
; nicely setup for the POKE. UUO and validity checking has already
; been done, so there's little to do.
; Call: MOVE T1, mapped address
; MOVE T2, old contents
; MOVE T3, new contents
; PUSHJ P,MONDEP
;
MONDEP:
; *** TURN OFF PHYSICAL POKE FOR NOW ***
; TLNN F,FL.PPM ;PHYSICAL PAGE MAPPING?
TDZA T2,T2 ;MONITOR VIRTUAL ADDRESSING
MOVEI T2,UU.PHY ;PHYSICAL CORE ADDRESSING
MOVE T1,[3,,POKBLK] ;SET UP UUO
TLNE F,FL.PAT ;PATCHING?
POKE. T1,(T2) ;WRITE A WORD
ERR. (,CPOPJ) ;POKE. UUO FAILURE
JRST CPOPJ1 ;RETURN
; Test if conversion from virtual to physical address is needed
; Call: PUSHJ P,MONCVT
; <NON-SKIP> ;NO CONVERSION NECESSARY
; <SKIP> ;CONVERT
;
MONCVT: POPJ P, ;NEVER CONVERT
SUBTTL Address mapping -- Job
; Here at initialization to validate arguments and pick up the
; job number.
;
JOBINI: TLNN F,FL.PPM!FL.EXE ;CHECK FOR ILLEGAL FLAGS
ERR. (CMF,CPOPJ) ;CONFLICTING MAPPING CODE AND FLAGS
MOVE T1,USRACS+.AP ;GET ARGUMENT
SKIPG T1,.MPARG(T1) ;GET JOB NUMBER
ERR. (IJN,CPOPJ) ;ILLEGAL JOB NUMBER
MOVEM T1,USRJOB ;WHICH IS THE JOB NUMBER FOR JOB MODE
JRST CPOPJ1 ;RETURN
; Here to create a page and map in one page from the target job
; Call: MOVE A2, index into page tables
; PUSHJ P,JOBCRE
; <NON-SKIP> ;COULDN'T MAP PAGE
; <SKIP> ;PAGE MAPPED
;
JOBCRE: TLNE F,FL.PPM!FL.TPP ;PHYSICAL PAGE MAPPING?
POPJ P, ;CAN'T DO THAT FOR A JOB
PUSHJ P,SAVT2 ;SAVE T1 AND T2
MOVSI T1,(CB.CRE) ;GET A BIT
TDNE T1,.CBFLG(A2) ;HAS A PAGE BEEN CREATED?
JRST JOBC.1 ;YES
MOVE T1,.CBUSR(A2) ;GET A OUR PAGE NUMBER
PUSHJ P,PAGACC ;CHECK PAGE ACCESSIBILITY
SKIPA ;NOT THERE
JRST JOBC.1 ;ONWARD
PUSHJ P,PAGCRE ;DO IT
POPJ P, ;CAN'T
JOBC.1: MOVSI T2,(CB.CRE) ;GET A BIT
IORM T2,.CBFLG(A2) ;MARK PAGE AS BEING CREATED
JOBC.2: HRLZ T1,USRJOB ;GET JOB NUMBER
HRRI T1,PAGSIZ ;WANT A WHOLE PAGE
MOVEM T1,UUOARG+0 ;SAVE IT
MOVE T1,.CBUSR(A2) ;GET OUR PAGE NUMBER
HRL T1,.CBPRC(A2) ;GET PAGE WE'RE MAPPING
LSH T1,11 ;CONVERT TO MAPPED ADDR,,USER ADDR
MOVEM T1,UUOARG+1 ;SAVE IT
MOVEI T1,UUOARG ;SET UP UUO
JOBPEK T1, ;MAP THE JOB'S PAGE INTO OURS
ERR. (,CPOPJ) ;JOBPEK UUO FAILURE
PUSHJ P,JOBDES ;ZAP THE PAGE TABLE ENTRIES
JFCL ;CAN'T FAIL
JRST CPOPJ1 ;RETURN
; All that is needed to invalidate a mapped job page is to
; zap a couple of entries. It would be counterproductive
; to actually destroy the pages in question.
;
JOBDES: PUSHJ P,SAVT1 ;SAVE T1
MOVSI T1,(CB.CRE) ;GET THE CREATED BIT
ANDCAM T1,.CBFLG(A2) ;CLEAR IT
JRST CPOPJ1 ;RETURN
JOBDEP: TLNN F,FL.PAT ;PATCHING?
POPJ P, ;NO
HRLZ T4,USRJOB ;GET THE JOB NUMBER
TLO T4,(JK.WRT) ;LITE THE WRITE BIT
HRRI T4,1 ;WRITE ONLY ONE WORD
MOVEM T4,UUOARG+0 ;SAVE FLAG WORD
MOVSI T4,POKBLK+2 ;WORD TO WRITE IS IN POKBLK+2
HRR T4,POKBLK+0 ;GET USER VIRTUAL ADDRESS FOR JOB
MOVEM T4,UUOARG+1 ;SAVE IT
MOVEI T4,UUOARG ;SET UP UUO
JOBPEK T4, ;WRITE THAT JOB'S CORE IMAGE
ERR. (,CPOPJ) ;JOBPEK UUO FAILURE
JRST JOBDES ;INVALIDATE THAT PAGE AND RETURN
; Test if conversion from virtual to physical address is needed
; Call: PUSHJ P,JOBCVT
; <NON-SKIP> ;NO CONVERSION NECESSARY
; <SKIP> ;CONVERT
;
JOBCVT: POPJ P, ;NEVER CONVERT
SUBTTL Address mapping -- File
FILINI: MOVE T1,USRACS+.AP ;GET USER'S ARG POINTER
MOVE T1,.MPARG(T1) ;GET ADDRESS OF FILESPEC
PUSHJ P,FILOPN ;OPEN THE FILE
ERR. (MIF,CPOPJ) ;MAPPER INITIALIZATION FAILURE
TLNN F,FL.EXE ;EXE FILE MAPPING?
JRST CPOPJ1 ;NO - ALL DONE
PUSHJ P,EXEDIR ;LOAD .EXE DIRECTORY INTO CORE
ERR. (MIF,CPOPJ) ;MAPPER INITIALIZATION FAILURE
JRST CPOPJ1 ;RETURN
; Here to create a page and map in one page from a file
; Call: MOVE A2, index into page tables
; PUSHJ P,FILCRE
; <NON-SKIP> ;COULDN'T MAP PAGE
; <SKIP> ;PAGE MAPPED
;
FILCRE: PUSHJ P,SAVT4 ;SAVE T1, T2, T3, AND T4
MOVSI T1,(CB.PHY) ;GET PHYSICAL BIT
TLNE F,FL.PPM!FL.TPP ;DOING SOME FLAVOR OF PHYSICAL MAPPING?
IORM T1,.CBFLG(A2) ;YES
TLZ F,FL.TPP ;CLEAR TEMPORARY PHYSICAL PAGE MAPPING
MOVE T1,.CBUSR(A2) ;GET PAGE IN QUESTION
PUSHJ P,PAGCHK ;DOES IT EXIST
POPJ P, ;NO--AND WE CAN'T CREATE IT
MOVSI T1,(CB.CRE) ;GET A BIT
IORM T1,.CBFLG(A2) ;REMEMBER WE JUST CREATED THE PAGE
MOVE T1,.CBPRC(A2) ;GET PROCESS PAGE NUMBER
PUSHJ P,EXEPAG ;FIND THE FILE PAGE NUMBER
POPJ P, ;CAN'T
LSH T1,2 ;MULTIPLY TIMES 4 TO GET BLOCK NUMBER
TLNN F,FL.SIO ;SUPER I/O?
ADDI T1,1 ;NO - ADJUST BLOCK NUMBER
PUSHJ P,FILIPS ;POSITION FOR INPUT
POPJ P, ;CAN'T
MOVE T1,.CBUSR(A2) ;GET OUR PAGE NUMBER
LSH T1,11 ;COMVERT TO AN ADDRESS
SUBI T1,1 ;-1
HRLI T1,-PAGSIZ ;MAKE AN IOWD
MOVEM T1,IOLIST ;SAVE IT
PUSHJ P,FILRED ;READ THE PAGE
POPJ P, ;CAN'T
JRST CPOPJ1 ;RETURN
; Here to destroy a page
; Call: MOVE A2, index into page tables
; PUSHJ P,MONDES
; <NON-SKIP> ;DESTROY FAILED
; <SKIP> ;USER PAGE DESTROYED
;
FILDES: PUSHJ P,SAVT1 ;SAVE T1
MOVSI T1,(CB.CRE) ;GET A BIT
TDNN T1,.CBFLG(A2) ;PAGE MUST EXIST
POPJ P, ;LOSE
MOVE T1,.CBUSR(A2) ;GET OUR PAGE NUMBER
PUSHJ P,PAGDES ;DESTROY IT
POPJ P, ;CAN'T
MOVSI T1,(CB.CRE) ;GET THE CREATED BIT
ANDCAM T1,.CBFLG(A2) ;CLEAR IT
JRST CPOPJ1 ;RETURN
FILDEP: TLNN F,FL.PAT ;PATCHING?
POPJ P, ;NO
HALT .
; Test if conversion from virtual to physical address is needed
; Call: PUSHJ P,FILCVT
; <NON-SKIP> ;NO CONVERSION NECESSARY
; <SKIP> ;CONVERT
;
FILCVT: TLNN F,FL.GTS ;GETTABS SETUP?
POPJ P, ;NOT A MONITOR IF NO GETTABS SIMULATION
SKIPE HIORG ;SKIP IF WE DON'T KNOW THE HISEG ORIGIN
CAMGE T1,HIORG ;BELOW THE HIGH SEG ORIGIN?
JRST FILC.1 ;YES
SKIPE HIFLAG ;HIGH SEGMENT MAPPED?
AOS (P) ;YES--DECODE PAGE MAP
POPJ P, ;ELSE TREAT AS A PHYSICAL REFERENCE
FILC.1: CAMLE T1,HGHUEA ;BEYOND HIGHEST UNMAPPED EXEC ADDRESS?
AOS (P) ;NEED TO CONVERT
POPJ P, ;RETURN
SUBTTL Cache management -- Clear out the cache
; This routine must be called at the start of cache initialization.
; It will attempt to destroy any pages available for caching so
; we can get a fresh start.
;
CSHCLR: MOVE A1,MAPDAT+.MPCPN ;GET FIRST PAGE NUMBER
MOVE A2,PAGCNT ;GET COUNT OF AVAILABLE PAGES
CSHC.1: MOVE T1,A1 ;LOAD A PAGE NUMBER
PUSHJ P,PAGACC ;DOES THE PAGE EXIST?
SKIPA ;NO
PUSHJ P,PAGDES ;DESTROY IT
JFCL ;MAYBE THE PAGE WASN'T THERE
ADDI A1,1 ;ADVANCE PAGE NUMBER
SOJG A2,CSHC.1 ;LOOP FOR ALL PAGES
POPJ P, ;AND RETURN
SUBTTL Cache management -- Map the cache
; This routine will dynamically allocate the hash table
; and chunks out of the pages allotted for mapping. It is
; also responsible for setting and/or adjusting the count
; of available pages for caching and the starting page to
; cache.
;
CSHMAP: MOVE A1,MAPDAT+.MPCPN ;GET FIRST PAGE NUMBER TO USE
LSH A1,11 ;CONVERT TO AN ADDRESS
MOVEM A1,HASHTA ;SAVE HASH TABLE ADDRESS
MOVE A1,PAGCNT ;GET NUMBER OF PAGES TO CACHE
LSH A1,2 ;MULTIPLY BY 4 TO GET HASH TABLE SIZE
MOVEM A1,HASHTL ;SAVE LENGTH OF HASH TABLE
ADD A1,HASHTA ;GET LAST ADDRESS IN HASH TABLE
MOVEM A1,HASHCA ;SAVE AS ADDRESS OF FIRST CHUNK
MOVE A2,PAGCNT ;GET NUMBER OF PAGES TO CACHE
IMULI A2,.CBLEN ;GET WORDS NEEDED FOR CHUNKS
ADDI A1,(A2) ;TOTAL UP WORDS NEEDED
MOVE A2,A1 ;COPY NUMBER OF WORDS
SUB A1,HASHCA ;GET LENGTH OF CHUNK AREA
MOVEM A1,HASHCL ;SAVE IT
TRZE A2,PAGSIZ-1 ;ON A PAGE BOUNDRY?
ADDI A2,PAGSIZ ;ROUND UP
LSH A2,-11 ;GET FIRST AVAILABLE PAGE FOR MAPPING
MOVEM A2,CSHPAG ;SAVE IT
SUB A2,MAPDAT+.MPCPN ;GET PAGES USED FOR TABLE AND CHUNKS
MOVN A3,A2 ;GET NEGATIVE COUNT
CAML A2,PAGCNT ;HAVE ENOUGH AVAILABLE?
ERR. (HAF,CPOPJ) ;HASH TABLE ALLOCATION FAILURE
EXCH A2,PAGCNT ;SWAP
SUBM A2,PAGCNT ;UPDATE NEW NUMBER OF PAGES AVAILABLE
IMULI A3,.CBLEN ;GET WORDS TO TRIM
ADDM A3,HASHCL ;ADJUST LENGTH OF CHUNK AREA
MOVE A1,HASHTA ;GET ADDRESS OF HASH TABLE
LSH A1,-11 ;CONVERT TO A PAGE NUMBER
MOVE A2,CSHPAG ;GET FIRST PAGE TO CACHE
SUB A2,A1 ;GET NUMBER OF PAGES TO CREATE
CSHM.1: MOVE T1,A1 ;GET A PAGE NUMBER
PUSHJ P,PAGACC ;DOES THE PAGE ALREADY EXIST?
SKIPA ;NOT THERE
JRST CSHM.2 ;ON TO THE NEXT PAGE
PUSHJ P,PAGCRE ;CREATE IT
ERR. (HAF,CPOPJ) ;HASH TABLE ALLOCATION FAILURE
CSHM.2: ADDI A1,1 ;POINT TO NEXT PAGE
SOJG A2,CSHM.1 ;LOOP FOR ALL PAGES
JRST CPOPJ1 ;RETURN
SUBTTL Cache management -- Set up the hash tables and links
;Call: PUSHJ P,CSHINI
; <return>
;
CSHINI: MOVE A1,HASHTA ;GET STARTING ADDRESS OF HASH TABLE
SKIPA A2,HASHTL ;GET LENGTH OF HASH TABLE
; Link all hash entries to themselves
CSHI.1: ADDI A1,2 ;ADDRESS OF SELF
MOVEM A1,.CBNHB(A1) ;STORE NEXT
MOVEM A1,.CBPHB(A1) ;AND PREVIOUS TO SELF
SUBI A2,1 ;ADVANCE TO NEXT
SOJG A2,CSHI.1 ;AND LOOP FOR ALL
; Link header entry links to themselves
MOVEI A1,CBHEAD ;ADDRESS OF HEADER
MOVEM A1,CBHEAD+.CBNAB ;STORE NEXT
MOVEM A1,CBHEAD+.CBPAB ;AND PREVIOUS TO SELF
MOVEM A1,CBHEAD+.CBNHB ;STORE NEXT IN INVALID LIST
MOVEM A1,CBHEAD+.CBPHB ;AND PREVIOUS TO SELF
MOVE A1,HASHCA ;POINT TO START OF CHUNKS
MOVE A2,CSHPAG ;GET STARTING PAGE FOR CACHING
MOVE A3,PAGCNT ;GET COUNT OF PAGES TO CACHE
MOVSI A4,(CB.AVA) ;GET CHUNK AVAILABLE BIT
CSHI.2: MOVEM A2,.CBUSR(A1) ;SAVE PAGE NUMBER FOR THIS CHUNK
MOVEM A4,.CBFLG(A1) ;MARK CHUNK AVAILABLE
MOVE T1,.CBUSR(A1) ;GET A PAGE NUMBER
ADDI A1,.CBLEN ;POINT TO NEXT CHUNK
ADDI A2,1 ;ADVANCE TO NEXT PAGE NUMBER
SOJG A3,CSHI.2 ;LOOP
POPJ P, ;RETURN
SUBTTL Cache management -- Set cache size
; Change the cache size. This routine will increase
; or decrease the size of the cache on the fly.
; Call: MOVE A1, size of cache
; PUSHJ P,CSHSIZ
; <error> ;Cant allocate more space
; <normal> ;cache expanded/contracted
;
CSHSIZ: SKIPGE A1 ;NEGATIVE SIZE IS BAD
ERR. (ICS,CPOPJ) ;ILLEGAL CACHE SIZE REQUESTED
PUSHJ P,SAVT1 ;SAVE T1
MOVE T1,A1 ;COPY SIZE
SUB T1,PAGCNT ;MINUS CURRENT SIZE
JUMPE T1,CPOPJ1 ;RETURN IF NO CHANGE
JUMPG T1,CSHS.2 ;EXPAND CACHE
CSHS.1: PUSHJ P,CSHDEA ;DEALLOCATE A CHUNK
AOJL T1,CSHS.1 ;LOOP FOR ALL
JRST CSHS.3 ;AND EXIT
CSHS.2: PUSHJ P,CSHALC ;ALLOCATE A CHUNK
ERR. (NFC,CPOPJ) ;NO FREE CHUNKS FOR CACHE
SOJG T1,CSHS.2 ;LOOP FOR ALL
CSHS.3: MOVE T1,PAGCNT ;GET UPDATED CACHED PAGE COUNT
MOVEM T1,MAPDAT+.MPCPC ;TELL THE CALLER
JRST CPOPJ1 ;RETURN
SUBTTL Cache management -- Allocate a chunk for the cache
; Call: PUSHJ P,CSHALC
; <error> ;Cant allocate another chunk
; <normal> ;another chunk allocated
;
CSHALC: MOVE A2,HASHCA ;POINT TO START OF CHUNKS
MOVE A3,HASHCL ;GET LENGTH OF CHUNK AREA
MOVSI A4,(CB.AVA) ;GET THE AVAILABLE CHUNK BIT
CSHA.1: TDNE A4,.CBFLG(A2) ;CHUNK FREE?
JRST CSHA.2 ;YES
ADDI A2,.CBLEN ;POINT TO NEXT CHUNK
SUBI A3,.CBLEN ;COUNT
JUMPG A3,CSHA.1 ;LOOP 'TIL WE FIND ONE
POPJ P, ;LOSE
CSHA.2: ANDCAM A4,.CBFLG(A2) ;NO LONGER FREE
AOS PAGCNT ;COUNT CHUNKS INSERTED
;Link new chunk at beginning of "free" hash list
MOVE A3,CBHEAD+.CBNHB ;GET FORWARD FROM HEADER
MOVE A4,.CBPHB(A3) ;AND PREVIOUS FROM TOP
MOVEM A2,CBHEAD+.CBNHB ;INSERT US AT THE TOP
MOVEM A2,.CBPHB(A3) ;PREVIOUS OF OLD TOP IS US
MOVEM A3,.CBNHB(A2) ;NEXT OF US IS OLD TOP
MOVEM A4,.CBPHB(A2) ;PREVIOUS OF US IS HEADER
;Clear out any trash
SETZM .CBPRC(A2) ;CLEAR PROCESS PAGE NUMBER
;Link new chunk at end of accessed list
MOVE A3,CBHEAD+.CBPAB ;GET FORWARD FROM HEADER
MOVE A4,.CBNAB(A3) ;AND NEXT FROM TOP
MOVEM A2,CBHEAD+.CBPAB ;INSERT US AT THE TOP
MOVEM A2,.CBNAB(A3) ;NEXT OF OLD TOP IS US
MOVEM A3,.CBPAB(A2) ;PREVIOUS OF US IS OLD TOP
MOVEM A4,.CBNAB(A2) ;NEXT OF US IS HEADER
JRST CPOPJ1 ;AND SKIP RETURN
SUBTTL Cache management -- Deallocate a page from the cache
; Call: PUSHJ P,CSHDEA
; <return>
;
CSHDEA:
; Delete from access chunk chain
MOVE A2,CBHEAD+.CBPAB ;LAST CHUNK IN CACHE
MOVE A3,.CBNAB(A2) ;GET NEXT
MOVE A4,.CBPAB(A2) ;GET PREVIOUS
MOVEM A3,.CBNAB(A4) ;REMOVE FROM FORWARD CHAIN
MOVEM A4,.CBPAB(A3) ;REMOVE FROM PREVIOUS CHAIN
;Delete from hash chain
MOVE A3,.CBNHB(A2) ;GET NEXT
MOVE A4,.CBPHB(A2) ;GET PREVIOUS
MOVEM A3,.CBNHB(A4) ;REMOVE FROM FORWARD CHAIN
MOVEM A4,.CBPHB(A3) ;REMOVE FROM PREVIOUS CHAIN
;Return core, fix up cache size
MOVE A3,.CBFLG(A2) ;GET THE FLAG WORD
TLZE A3,(CB.CRE) ;PAGE REALLY EXIST?
PUSHJ P,@DESTAB(F) ;YES--DESTROY IT
JFCL
TLO A3,(CB.AVA) ;MARK CHUNK AVAILABLE
MOVEM A3,.CBFLG(A2) ;UPDATE FLAG WORD
SOS PAGCNT ;CACHE IS 1 CHUNK SMALLER
POPJ P, ;AND RETURN
SUBTTL Cache management -- Find an entry in the cache
; Call: MOVE A1, page number
; PUSHJ P,CSHFND
; <error> ;page not in cache T2/ address to insert
; <normal> ;page in cache T2/ address of entry
;
CSHFND:
; Hash page number to initial entry in table
MOVE A4,HASHTL ;GET HASH TABLE LENGTH
LSH A4,-1 ;DIVIDE BY 2
MOVE A2,A1 ;COPY PAGE NUMBER
IDIV A2,A4 ;HASH INTO TABLE
LSH A3,1 ;DOUBLE REMAINDER
MOVE A4,HASHTA ;GET HASH TABLE ADDRESS
ADDI A4,(A3) ;INDEX INTO IT
MOVE A2,A4 ;COPY POINTER TO START
AOS MAPDAT+.MPHSF ;COUNT HASH TABLE SEARCHES
TLNN F,FL.PPM!FL.TPP ;PHYSICAL PAGE MAPPING?
SKIPA A3,[TDNN A3,.CBFLG(A2)] ;GET TEST IF PHYSICAL BIT MUST BE OFF
MOVE A3,[TDNE A3,.CBFLG(A2)] ;GET TEST IF PHYSICAL BIT MUST BE ON
MOVEM A3,CSHXCT ;SAVE IT
MOVSI A3,(CB.PHY) ;GET THE PHYSICAL BIT
; Loop through hash chain from initial probe
;
CSHF.1: CAMN A4,.CBNHB(A2) ;SEE IF LOOPED AROUND
POPJ P, ;YES--NOT IN TABLE
MOVE A2,.CBNHB(A2) ;COPY CURRENT PAGE
XCT CSHXCT ;TEST FOR PHYSICAL PAGE
CAME A1,.CBPRC(A2) ;MATCH THE PROCESS PAGE NUMBER?
SKIPA
JRST CPOPJ1 ;FOUND IT--RETURN
AOS MAPDAT+.MPHSC ;WRONG PAGE--COUNT COLLISIONS
JRST CSHF.1 ;AND LOOP
SUBTTL Cache management -- Insert (replace) a new page in the cache
; Call: MOVE A1, page number
; MOVE A2, entry to add after
; PUSHJ P,CSHINS
; <return>
;
CSHINS: CAMN A2,CBHEAD+.CBPAB ;SAME AS ENTRY WE FIDDLE
JRST [MOVEM A1,.CBPRC(A2) ;SAVE NEW PROCESS PAGE NUMBER
JRST CSHMRU] ;AND MOVE TO TOP
; Store page number, replace last page in access chain
PUSH P,A2 ;SAVE ENTRY TO ADD
MOVE A2,CBHEAD+.CBPAB ;GET LAST IN CHAIN
;Unlink from old hash chain
MOVE A3,.CBNHB(A2) ;GET NEXT
MOVE A4,.CBPHB(A2) ;GET PREVIOUS
MOVEM A3,.CBNHB(A4) ;REMOVE FROM FORWARD CHAIN
MOVEM A4,.CBPHB(A3) ;REMOVE FROM PREVIOUS CHAIN
;Link this chunk into correct hash chain
MOVE A1,A2
POP P,A2 ;RESTORE ENTRY TO ADD
MOVE A4,.CBNHB(A2) ;AND NEXT LINK
MOVEM A1,.CBNHB(A2) ;INSERT AFTER PREVIOUS
MOVEM A1,.CBPHB(A4) ;AND AS PREVIOUS OF OLD
MOVEM A2,.CBPHB(A1) ;STORE PREVIOUS OF OLD AS OURS
MOVEM A4,.CBNHB(A1) ;STORE NEXT OF OLD AS OURS
MOVE A2,A1
JRST CSHMRU ;AND MOVE ENTRY TO TOP OF LIST
SUBTTL Cache management -- Move entry to top of list
; Call: MOVE A2, entry to move
; PUSHJ P,CSHMRU
; <return>
;
CSHMRU: CAMN A2,CBHEAD+.CBNAB ;WE AT THE TOP?
POPJ P, ;YES--SAVE SOME WORK
; Delete from current access chain position
MOVE A3,.CBNAB(A2) ;GET NEXT
MOVE A4,.CBPAB(A2) ;GET PREVIOUS
MOVEM A3,.CBNAB(A4) ;REMOVE FROM FORWARD CHAIN
MOVEM A4,.CBPAB(A3) ;REMOVE FROM PREVIOUS CHAIN
; Relink into "most recently used" position
MOVE A3,CBHEAD+.CBNAB ;GET FORWARD FROM HEADER
MOVE A4,.CBPAB(A3) ;AND PREVIOUS FROM TOP
MOVEM A2,CBHEAD+.CBNAB ;INSERT US AT THE TOP
MOVEM A2,.CBPAB(A3) ;PREVIOUS OF OLD TOP IS US
MOVEM A3,.CBNAB(A2) ;NEXT OF US IS OLD TOP
MOVEM A4,.CBPAB(A2) ;PREVIOUS OF US IS HEADER
POPJ P, ;AND RETURN
SUBTTL Text I/O -- Character
; Input a character converting tabs to spaces and lower to upper case
; Call: PUSHJ P,TYI
; <RETURN> ;T1:= CHARACTER
;
TYI: ILDB T1,BYTPTR ;GET A CHARACTER
CAIN T1,"I"-100 ;TAB?
MOVEI T1," " ;YES - CONVERT TO A SPACE
CAIG T1,"Z"+40 ;CHECK FOR A LOWER CASE
CAIGE T1,"A"+40 ; CHARACTER THAT NEEDS TO BE
SKIPA ; CONVERTED TO AN UPPER CASE
TRZ T1," " ; CHARACTER
POPJ P, ;RETURN
; Output a character
; Call: MOVE T1, character
; PUSHJ P,TYO
; <RETURN>
;
TYO: SKIPN BYTPTR ;OUTPUT TO TTY?
JRST [OUTCHR T1 ;YES
POPJ P,] ;RETURN
SOSLE BYTCNT ;COUNT CHARACTERS
IDPB T1,BYTPTR ;SAVE CHARACTER
POPJ P, ;RETURN
SUBTTL Text I/O -- ASCIZ
; Output an ASCIZ string
; Call: MOVE T1, string address
; PUSHJ P,TSTRG
; <RETURN>
;
TSTRG: HRLI T1,(POINT 7,) ;MAKE A BYTE POINTER
PUSH P,T1 ;SAVE IT
TSTR.1: ILDB T1,(P) ;GET A CHARACTER
JUMPE T1,TSTR.2 ;DONE?
PUSHJ P,TYO ;TYPE IT
JRST TSTR.1 ;LOOP
TSTR.2: POP P,T1 ;PHASE STACK
POPJ P, ;RETURN
SUBTTL Text I/O -- Sixbit
; Input a possibly quoted sixbit word
; Call: PUSHJ P,SIXIN
; <RETURN> ;T1:= WORD, T2:= TERMINATING CHARACTER
;
SIXIN: MOVE T2,[POINT 6,T3] ;GET BYTE POINTER TO ATOM BUFFER
PUSH P,[0] ;RESERVE A WORD
SETZ T3, ;CLEAR RESULT
PUSHJ P,FLUSH ;FLUSH LEADING SPACES AND TABS
CAIN T1,"#" ;WANTS TO INPUT IN OCTAL?
JRST OCTIN ;YES
SKIPA ;ANALYZE CHARACTER
SIXI.1: PUSHJ P,TYI ;GET A CHARACTER
CAIN T1,"""" ;QUOTE CHARACTER?
JRST SIXI.2 ;YES
SKIPE (P) ;QUOTING?
JUMPN T1,SIXI.4 ;ALL CHARACTERS ARE LEGAL
JRST SIXI.3 ;NO
SIXI.2: PUSHJ P,TYI ;GET NEXT CHARACTER
CAIN T1,"""" ;ANOTHER QUOTE?
JRST SIXI.4 ;SAVE IT
SETCMM (P) ;NO - TOGGLE QUOTE FLAG
SKIPE (P) ;QUOTING?
JRST SIXI.4 ;YES
SIXI.3: CAIL T1,"0" ;RANGE
CAILE T1,"9" ; CHECK
CAIL T1,"A" ; THE
CAILE T1,"Z" ; CHARACTER
JRST SIXI.5 ;NOT A GOOD CHARACTER
SIXI.4: TLNE T2,77 ;WORD FULL YET?
JRST SIXI.1 ;YES - IGNORE CHARACTER
SUBI T1," " ;CONVERT ASCII TO SIXBIT
IDPB T1,T2 ;SAVE THE CHARACTER
JRST SIXI.1 ;GET ANOTHER ONE
SIXI.5: MOVE T2,T1 ;GET TERMINATING CHARACTER
MOVE T1,T3 ;GET RESULT
POP P,(P) ;TRIM STACK
POPJ P, ;RETURN
; Output a sixbit word
; Call: MOVE T1, word
; PUSHJ P,SIXOUT
; <RETURN>
;
SIXOUT: SKIPN T2,T1 ;COPY WORD TO OUTPUT
POPJ P, ;NOTHING TO DO
SIXO.1: LSHC T1,6 ;SHIFT IN A CHARACTER
ANDI T1,77 ;NO JUNK
ADDI T1," " ;CONVERT TO ASCII
PUSHJ P,TYO ;OUTPUT IT
JUMPN T2,SIXO.1 ;LOOP
POPJ P, ;RETURN
SUBTTL Text I/O -- Octal
; Input an octal word
; Call: PUSHJ P,OCTIN
; <RETURN> ;T1:= WORD, T2:= TERMINATING CHARACTER
;
OCTIN: SETZ T2, ;CLEAR RESULT AND MASK
PUSHJ P,FLUSH ;EAT LEADING SPACES AND TABS
CAIL T1,"A" ;CHECK FOR
CAILE T1,"Z" ; A LETTER
JRST OCTI.2 ;ASSUME A DIGIT
PUSHJ P,BACKUP ;BACKUP THE BYTE POINTER
JRST SIXIN ;GO INPUT SIXBIT
OCTI.1: PUSHJ P,TYI ;GET A CHARACTER
OCTI.2: CAIL T1,"0" ;RANGE CHECK
CAILE T1,"7" ; FOR AN OCTAL DIGIT
JRST OCTI.3 ;NO GOOD - FINISH UP
LSH T2,3 ;SHIFT RESULT
SUBI T1,"0" ;CONVERT ASCII TO OCTAL
IOR T2,T1 ;INCLUDE THE DIGIT
JRST OCTI.1 ;LOOP
OCTI.3: EXCH T1,T2 ;SWAP RESULT AND TERMINATING CHARACTER
POPJ P, ;RETURN
; Output an octal word
; Call: MOVE T1, word
; PUSHJ P,OCTOUT
;
OCTOUT: SKIPL T1 ;NEGATIVE?
JRST OCTO.1 ;NO
PUSH P,T1 ;SAVE NUMBER
MOVEI T1,"-" ;GET MINUS SIGN
PUSHJ P,TYO ;OUTPUT IT
POP P,T1 ;GET NUMBER
MOVMS T1 ;MAKE IT POSITIVE
OCTO.1: IDIVI T1,10 ;DIVIDE BY RADIX
PUSH P,T2 ;SAVE REMAINDER
SKIPE T1 ;DONE?
PUSHJ P,OCTO.1 ;RECURSE
POP P,T1 ;GET A DIGIT
ADDI T1,"0" ;CONVERT TO ASCII
JRST TYO ;OUTPUT CHARACTER AND RETURN
; Output a CRLF
; Call: PUSHJ P,TCRLF
;
TCRLF: MOVEI T1,15 ;GET A <CR>
PUSHJ P,TYO ;TYPE IT
MOVEI T1,12 ;GET A <LF>
JRST TYO ;TYPE IT AND RETURN
; Output a PC
; Call: MOVE T1, PC
; PUSHJ P,PCOUT
;
PCOUT: TLNN T1,-1 ;A SECTION NUMBER?
JRST PCOU.1 ;NO
PUSH P,T1 ;SAVE PC
HLRZS T1 ;GET SECTION
PUSHJ P,OCTOUT ;TYPE IT
MOVEI T1,"," ;GET SEPARATOR
PUSHJ P,TYO ;TYPE IT
PUSHJ P,TYO ;AGAIN
POP P,T1 ;RESTORE PC
HRRZS T1 ;GET RELATIVE PC
PCOU.1: HRLO T2,T1 ;MAKE IT PC,,-1
PCOU.2: LSHC T1,3 ;SHIFT IN A DIGIT
ANDI T1,7 ;STRIP OFF JUNK
ADDI T1,"0" ;MAKE IT ASCII
PUSHJ P,TYO ;TYPE IT
TRNE T2,-1 ;DONE SIX DIGITS YET?
JRST PCOU.2 ;NO--LOOP
POPJ P, ;RETURN
SUBTTL Text I/O -- Filespec
; Output a filespec
; Call: PUSHJ P,FILOUT
; <RETURN>
;
FILOUT: MOVE T1,FOPBLK+.FODEV ;GET DEVICE
PUSHJ P,SIXOUT ;OUTPUT IT
MOVEI T1,":" ;GET SEPARATOR
PUSHJ P,TYO ;TYPE COLON
MOVE T1,LERBLK+.RBNAM ;GET NAME
PUSHJ P,SIXOUT ;OUTPUT IT
MOVEI T1,"." ;GET SEPARATOR
PUSHJ P,TYO ;OUTPUT PERIOD
HLLZ T1,LERBLK+.RBEXT ;GET EXTENSION
PUSHJ P,SIXOUT ;OUTPUT IT
MOVEI T1,"[" ;GET PATH DELIMITER
PUSHJ P,TYO ;OUTPUT
SKIPGE T1,PTHBLK+.PTPPN ;GET PPN
JRST FILO.1 ;IT'S SIXBIT
HLRZS T1 ;GET PROJECT NUMBER
PUSHJ P,OCTOUT ;OUTPUT IT
MOVEI T1,"," ;GET SEPARATOR
PUSHJ P,TYO ;OUTPUT IT
HRRZ T1,PTHBLK+.PTPPN ;GET PROGRAMMER NUMBER
PUSHJ P,OCTOUT ;OUTPUT
JRST FILO.2 ;ONWARD
FILO.1: PUSHJ P,SIXOUT ;OUTPUT IT
FILO.2: MOVEI T3,PTHBLK+.PTSFD ;POINT TO START OF SFDS
FILO.3: SKIPN (T3) ;HAVE AN SFD
JRST FILO.4 ;END OF PATH
MOVEI T1,"," ;GET SEPARATOR
PUSHJ P,TYO ;OUTPUT IT
MOVE T1,(T3) ;GET AN SFD
PUSHJ P,SIXOUT ;OUTPUT IT
AOJA T3,FILO.3 ;LOOP
FILO.4: MOVEI T1,"]" ;GET END OF PATH
JRST TYO ;OUTPUT IT AND RETURN
SUBTTL Text I/O -- Miscellaneous
; Set up byte pointer and count
; Call: MOVE T1, address to store text or 0 for TTY output
; MOVE T2, character count
; PUSHJ P,TXTSET
;
TXTSET: SKIPE T1 ;OUTPUT TO TTY?
HRLI T1,(POINT 7,) ;NO--MAKE A BYTE POINTER
MOVEM T1,BYTPTR ;SAVE IT
MOVEM T2,BYTCNT ;SAVE CHARACTER COUNT
POPJ P, ;RETURN
; Flush leading spaces and tabs
; Call: PUSHJ P,FLUSH
; <RETURN> ;T1:= FIRST NON-BLANK CHARACTER
;
FLUSH: PUSHJ P,TYI ;GET A CHARACTER
CAIN T1," " ;A SPACE?
JRST FLUSH ;YES - EAT IT
POPJ P, ;RETURN
; Back up the text byte pointer 1 character
; Call: PUSHJ P,BACKUP
;
; On return, T1 has been updated with the current character
;
BACKUP: MOVE T1,BYTPTR ;GET THE BYTE POINTER
ADD T1,[70000,,0] ;BACKUP 1 CHARACTER
SKIPG T1 ;OVER A WORD BOUNDRY?
SUB T1,[430000,,1] ;YES - BACKUP A WORD
MOVEM T1,BYTPTR ;SAVE UPDATED POINTER
LDB T1,BYTPTR ;LOAD THE PREVIOUS CHARACTER
POPJ P, ;RETURN
SUBTTL Paging -- Check accessibility
; Check accessibility of a page in our address space
; Call: MOVE T1, page number
; PUSHJ P,PAGACC
; <NON-SKIP> ;PAGE DOES NOT EXIST
; <SKIP> ;PAGE EXISTS
;
PAGACC: MOVEM T1,UUOARG ;SAVE PAGE NUMBER
HRLI T1,.PAGCA ;LOAD A FUNCTION CODE
PAGE. T1, ;READ ACCESS BITS
SETO T1, ;ASSUME PAGE NOT THERE
TLNN T1,(PA.GNE) ;NON-EXISTANT PAGE?
AOS (P) ;NO
MOVE T1,UUOARG ;RELOAD PAGE NUMBER
POPJ P, ;RETURN
; Check to see if the a reference to a page will cause
; an illegal memory reference. If so, create it.
; Call: MOVE T1, page number
; PUSHJ P,PAGCHK
; <NON-SKIP> ;PAGE CREATE FAILED
; <SKIP> ;PAGE EXISTS
;
PAGCHK: PUSHJ P,PAGACC ;CHECK ACCESSIBILITY
JRST PAGCRE ;CREATE IT AND RETURN
JRST CPOPJ1 ;IT ALREADY EXISTS
SUBTTL Paging -- Create/Destroy
; Create or destroy a page in our address space
; Call: MOVE T1, page number
; PUSHJ P,PAGCRE/PAGDES
; <NON-SKIP> ;FAILED
; <SKIP> ;SUCEEDED
;
PAGDES: TLO T1,(PA.GAF) ;LITE THE DESTROY BIT
PAGCRE: MOVEM T1,UUOARG+1 ;SAVE IT
MOVEI T1,1 ;ONE WORD
MOVEM T1,UUOARG+0 ;SAVE WORD COUNT
MOVE T1,[.PAGCD,,UUOARG] ;SET UP UUO
PAGE. T1, ;CREATE OR DESTROY A PAGE
ERR. (,.+2) ;CAN'T
AOS (P) ;FORCE SKIP RETURN
MOVE T1,UUOARG+1 ;RELOAD THE PAGE NUMBER
TLZ T1,(PA.GAF) ;TURN OFF THE ALTERNATE FUNCTION BIT
POPJ P, ;RETURN
SUBTTL Paging -- SPY page creation
; Create a SPY page using physical or virtual mapping
; Call: MOVE T1, monitor page
; MOVE T2, user page
; PUSHJ P,PAGSPY
; <NON-SKIP> ;FAILED
; <SKIP> ;SUCEEDED
;
PAGSPY: HRLZM T1,UUOARG+1 ;SAVE MONITOR PAGE NUMBER
HRRM T2,UUOARG+1 ;SAVE USER PAGE NUMBER
MOVEI T1,1 ;ONE WORD
MOVEM T1,UUOARG+0 ;SAVE WORD COUNT
MOVE T1,[.PAGSP,,UUOARG] ;SET UP UUO
TLNN F,FL.PPM!FL.TPP ;PHYSICAL PAGE MAPPING?
TDZA T2,T2 ;NO
MOVEI T2,UU.PHY ;YES
PAGE. T1,(T2) ;CREATE A SPY PAGE
ERR. (,.+2) ;CAN'T
AOS (P) ;FORCE SKIP RETURN
TLZ F,FL.TPP ;CLEAR TEMPORARY PHYSICAL PAGE MAPPING
HLRZ T1,UUOARG+1 ;RELOAD MONITOR PAGE NUMBER
HRRZ T2,UUOARG+2 ;RELOAD USER PAGE NUMBER
POPJ P, ;RETURN
SUBTTL File I/O -- Open a file
; Open a file pointer to by the calling program
; Call: MOVE T1, address of ASCIZ filespec
; PUSHJ P,FILOPN
;
FILOPN: PUSHJ P,SCAN ;SCAN FILESPEC AND LOAD UUO BLOCKS
POPJ P, ;CAN'T
TLNE F,FL.SIO ;SUPER I/O?
TLNN F,FL.EXE ;AND .EXE FILE?
SKIPA ;OK
ERR. (CMF,CPOPJ) ;CONFLICTING MAPPING CODE AND FLAGS
MOVEI T1,.FORED ;ASSUME ONLY READING
TLNE F,FL.PAT ;PATCHING?
MOVEI T1,.FOSAU ;YES - USE UPDATE MODE
TLNE F,FL.SIO ;SUPER I/O?
MOVEI T1,.FOSIO ;YES - USE SUPER I/O MODE
TLO T1,(FO.ASC) ;ASSIGN A CHANNEL
MOVEM T1,FOPBLK+.FOFNC ;SAVE FUNCTION WORD
MOVEI T1,.IODMP ;DUMP MODE
TLNE F,FL.PIO ;PHYSICAL ONLY LOOKUP/ENTER?
TLO T1,(UU.PHS) ;YES
MOVEM T1,FOPBLK+.FOIOS ;SAVE IT
MOVEI T1,LERBLK ;GET LOOKUP/ENTER BLOCK ADDRESS
MOVEM T1,FOPBLK+.FOLEB ;SAVE IT
MOVEI T1,LERSIZ ;GET SIZE OF LOOKUP/ENTER BLOCK
MOVEM T1,LERBLK+.RBCNT ;SAVE IT
MOVE T1,[PTHSIZ,,PTHBLK] ;GET PATH BLOCK ADDRESS
MOVEM T1,FOPBLK+.FOPAT ;SAVE FOR READING PATH BACK
SKIPE PTHBLK+.PTPPN ;HAVE A DIRECTORY?
HRRZM T1,LERBLK+.RBPPN ;YES--SAVE FOR LOOKUP/ENTER
MOVE T1,[FILSIZ,,FILBLK] ;POINT TO THE BLOCK
MOVEM T1,FOPBLK+.FOFSP ;SAVE RETURNED FILESPEC POINTER
MOVE T1,[FOPSIZ,,FOPBLK] ;SET UP UUO
FILOP. T1, ;OPEN THE FILE
ERR. (,CPOPJ) ;FILOP. UUO FAILURE
MOVE T1,FOPBLK+.FOFNC ;GET FUNCTION CODE WORD
AND T1,[FO.CHN] ;KEEP JUST THE CHANNEL NUMBER
MOVEM T1,FILCHN ;SAVE IT
PUSHJ P,FILXTR ;EXTRACT THE FULL FILESPEC
JRST CPOPJ1 ;RETURN
; Here to extract the actual filespec and return it
; to the caller.
;
FILXTR: MOVE T1,PTHBLK+.PTSTR ;GET DEVICE NAME
MOVEM T1,FOPBLK+.FODEV ;SET IT JUST INCASE PATH. UUO FAILS
MOVEI T1,FILTAB ;POINT TO TABLE
SKIPE FILBLK+.FOFDV ;HAVE A RETURNED FILESPEC?
FILX.1: SKIPN (T1) ;END OF TABLE?
JRST FILX.2 ;YES
HLRZ T2,(T1) ;GET SOURCE ADDRESS
HRRZ T3,(T1) ;GET DESTINATION ADDRESS
SKIPE T4,(T2) ;GET A WORD
MOVEM T4,(T3) ;PUT A WORD
AOJA T1,FILX.1 ;LOOP
FILX.2: SETZM MAPDAT+.MPAFS ;CLEAR FIRST WORD
MOVE T1,[MAPDAT+.MPAFS,,MAPDAT+.MPAFS+1] ;SET UP BLT
BLT T1,MAPDAT+.MPAFS+.MPFWD ;CLEAR BLOCK
MOVEI T1,MAPDAT+.MPAFS ;POINT TO ACTUAL FILESPEC STORAGE
MOVEI T2,<.MPFWD*5>-1 ;GET MAXIMUM BYTE COUNT
PUSHJ P,TXTSET ;SETUP BYTE POINTER AND COUNT
PUSHJ P,FILOUT ;OUTPUT FILESPEC
POPJ P, ;RETURN
; Translation table
;
FILTAB: FILBLK+.FOFDV,,FOPBLK+.FODEV ;DEVICE
FILBLK+.FOFFN,,LERBLK+.RBNAM ;FILE NAME
FILBLK+.FOFEX,,LERBLK+.RBEXT ;EXTENSION
FILBLK+.FOFPP,,PTHBLK+.PTPPN ;PPN
FILBLK+.FOFSF+0,,PTHBLK+.PTSFD+0;SFD #1
FILBLK+.FOFSF+1,,PTHBLK+.PTSFD+1;SFD #2
FILBLK+.FOFSF+2,,PTHBLK+.PTSFD+2;SFD #3
FILBLK+.FOFSF+3,,PTHBLK+.PTSFD+3;SFD #4
FILBLK+.FOFSF+4,,PTHBLK+.PTSFD+4;SFD #5
EXP 0 ;TERMINATE TABLE
SUBTTL File I/O -- Close a file
; Close a file
; Call: PUSHJ P,FILCLS
;
FILCLS: SKIPN T1,FILCHN ;WE ONLY USE EXTENDED CHANNELS
POPJ P, ;DON'T ZAP CHANNEL ZERO
IORI T1,.FOREL ;INCLUDE THE FUNCTION CODE
MOVEM T1,FOPBLK+.FOFNC ;SAVE IT
MOVE T1,[1,,FOPBLK] ;SET UP UUO
FILOP. T1, ;CLOSE THE FILE
JFCL ;IGNORE ERRORS
SETZM FILCHN ;SO WE DON'T TRY THIS AGAIN
POPJ P, ;RETURN
SUBTTL File I/O -- Position a file
; Position file for input or output
; Call: MOVE T1, block number
; PUSHJ P,FILIPS ;INPUT
; PUSHJ P,FILOPS ;OUTPUT
;
FILIPS: MOVEM T1,FOPBLK+.FOIOS ;SAVE BLOCK NUMBER
MOVEI T1,.FOUSI ;USETI FUNCTION
JRST FILPOS ;CONTINUE
FILOPS: MOVEM T1,FOPBLK+.FOIOS ;SAVE BLOCK NUMBER
MOVEI T1,.FOUSO ;USETO FUNCTION
FILPOS: IOR T1,FILCHN ;INCLUDE THE CHANNEL NUMBER
MOVEM T1,FOPBLK+.FOFNC ;SAVE FUNCTION WORD
MOVE T1,[2,,FOPBLK] ;SET UP UUO
FILOP. T1, ;POSITION FOR INPUT OR OUTPUT
POPJ P, ;CAN'T
JRST CPOPJ1 ;RETURN
SUBTTL File I/O -- Input/Output
FILRED: SKIPA T1,[.FOINP] ;INPUT FUNCTION
FILWRT: MOVEI T1,.FOOUT ;OUTPUT FUNCTION
SETZM IOLIST+1 ;TERMINATE LIST
IOR T1,FILCHN ;INCLUDE THE CHANNEL NUMBER
MOVEM T1,FOPBLK+.FOFNC ;SAVE FUNCTION WORD
MOVEI T1,IOLIST ;POINT TO THE I/O COMMAND LIST
MOVEM T1,FOPBLK+.FOIOS ;TELL THE MONITOR
MOVE T1,[2,,FOPBLK] ;SET UP UUO
FILOP. T1, ;READ OR WRITE THE FILE
POPJ P, ;CAN'T
JRST CPOPJ1 ;RETURN
SUBTTL File I/O -- Scan a filespec
; This routine will scan off a filespec and load the appropriate
; locations in the FILOP., LOOKUP/ENTER and PATH. UUO blocks
; Call: MOVE T1, address of ASCIZ filespec
; PUSHJ P,SCAN
;
SCAN: HRLOI T2,377777 ;A LARGE NUMBER
PUSHJ P,TXTSET ;SET UP FOR TEXT I/O
SETZM FOPBLK ;CLEAR THE FIRST WORD
MOVE T1,[FOPBLK,,FOPBLK+1] ;SET UP BLT
BLT T1,FOPBLK+FOPSIZ-1 ;CLEAR THE FILOP. UUO BLOCK
SETZM LERBLK ;CLEAR THE FIRST WORD
MOVE T1,[LERBLK,,LERBLK+1] ;SET UP BLT
BLT T1,LERBLK+LERSIZ-1 ;CLEAR THE LOOKUP/ENTER UUO BLOCK
SETZM PTHBLK ;CLEAR THE FIRST WORD
MOVE T1,[PTHBLK,,PTHBLK+1] ;SET UP BLT
BLT T1,PTHBLK+PTHSIZ-1 ;CLEAR THE PATH. UUO BLOCK
GETPPN T1, ;GET OUR PPN
JFCL ;INCASE OF JACCT
MOVEM T1,FILPPN ;SAVE IT
TLZ F,FL.DEV!FL.NAM!FL.EXT!FL.DIR ;CLEAR SCANNER FLAGS
SCAN.1: PUSHJ P,SIXIN ;GET A FILESPEC PART
JUMPN T1,SCAN.4 ;SEE WHAT WE GOT
SCAN.2: CAIN T2,"." ;AN EXTENSION?
JRST SCAN.5 ;YES
CAIE T2,"[" ;A PATH?
CAIN T2,"<" ;2741 STYLE?
JRST SCAN.6 ;YES TO EITHER
CAIN T2," " ;SPACE?
JRST SCAN.1 ;KEEP SCANNING
PUSHJ P,BACKUP ;BACKUP TO THE TERMINATING CHARACTER
JRST SCNDEF ;CHECK LEGALITY AND DO DEFAULTING
; Device
;
SCAN.3: TLOE F,FL.DEV ;ALREADY HAVE A DEVICE?
ERR. (DDI,CPOPJ) ;DOUBLE DEVICE ILLEGAL
MOVEM T1,FOPBLK+.FODEV ;SAVE DEVICE
JRST SCAN.1 ;KEEP SCANNING
; File name
;
SCAN.4: CAIN T2,":" ;A DEVICE?
JRST SCAN.3 ;YES
TLOE F,FL.NAM ;ALREADY HAVE A FILE NAME?
ERR. (DFI,CPOPJ) ;DOUBLE FILE NAME ILLEGAL
MOVEM T1,LERBLK+.RBNAM ;SAVE FILE NAME
JRST SCAN.2 ;GO EXAMINE TERMINATOR
; Extension
;
SCAN.5: TLOE F,FL.EXT ;ALREADY HAVE AN EXTENSION
ERR. (DEI,CPOPJ) ;DOUBLE EXTENSION ILLEGAL
PUSHJ P,SIXIN ;GET A WORD
HLLZM T1,LERBLK+.RBEXT ;SAVE EXTENSION
JRST SCAN.2 ;GO EXAMINE TERMINATOR
; Path
;
SCAN.6: TLOE F,FL.DIR ;ALREADY HAVE A DIRECTORY?
ERR. (DPI,CPOPJ) ;DOUBLE PATH ILLEGAL
PUSHJ P,SCNPTH ;SCAN A PATH
POPJ P, ;FAILED
CAIE T2,"]" ;END OF PATH?
CAIN T2,">" ;2741 STYLE?
JRST SCAN.1 ;YES - LOOP BACK FOR MORE
JRST SCAN.2 ;NO - CHECK OTHER TERMINATORS
; Scan a path
;
SCNPTH: PUSHJ P,FLUSH ;EAT LEADING SPACES AND TABS
CAIN T1,"-" ;WANT DEFAULT PATH?
JRST SCNP.4 ;YES
PUSHJ P,BACKUP ;BACKUP THE BYTE POINTER
PUSHJ P,OCTIN ;GET PROJECT NUMBER
TLNN T1,777777 ;SIXBIT PPN?
HRLZS T1 ;NO
TLNN T1,777777 ;HAVE A PROJECT NUMBER?
HLL T1,FILPPN ;NO
IORM T1,PTHBLK+.PTPPN ;SAVE IT
TRNE T1,777777 ;SIXBIT PPN?
JRST SCNP.1 ;YES
CAIE T2,"," ;MUST HAVE A COMMA HERE
ERR. (PSE,CPOPJ) ;PATH SYNTAX ERROR
PUSHJ P,OCTIN ;GET PROGRAMMER NUMBER
TLNE T1,777777 ;SIXBIT PPN?
HLRZS T1 ;YES--TRUNCATE TO 18 BITS
TRNN T1,777777 ;HAVE A PROGRAMMER NUMBER?
HRR T1,FILPPN ;NO
IORM T1,PTHBLK+.PTPPN ;SAVE IT
SCNP.1: MOVEI T4,PTHBLK+.PTSFD ;POINT TO START OF SFDS
HRLI T4,-<PTHSIZ-.PTSFD-1> ;MAKE AN AOBJN POINTER
SCNP.2: CAIE T2,"," ;LEGAL SEPARATOR?
JRST CPOPJ1 ;NO--DONE
PUSHJ P,SIXIN ;GET AN SFD
JUMPE T1,[ERR. (NSI,CPOPJ)] ;NULL SFDS ARE ILLEGAL
MOVEM T1,0(T4) ;SAVE IT
AOBJN T4,SCNP.2 ;LOOP
ERR. (SND,CPOPJ) ;SFDS NESTED TOO DEEP
SCNP.4: SETOM PTHBLK+.PTFCN ;SET FUNCTION CODE
MOVE T1,[PTHSIZ,,PTHBLK] ;SET UP UUO
PATH. T1, ;READ OUR DEFAULT PATH
ERR. (CRP,CPOPJ) ;UUO FAILED--CAN'T READ PATH
PUSHJ P,FLUSH ;EAT SPACES AND TABS
JRST CPOPJ1 ;AND RETURN
; Check for a legal filespec and do extension defaulting
;
SCNDEF: MOVSI T1,'DSK' ;GET A DEVICE
TLNN F,FL.DEV ;ONE SPECIFIED?
MOVEM T1,FOPBLK+.FODEV ;DEFAULT TO DSK
TLNN F,FL.NAM!FL.EXT!FL.DIR ;ANY FILESPEC PARTS?
JRST CPOPJ1 ;NO
TLNN F,FL.EXE ;.EXE FILE?
JRST CPOPJ1 ;A DATA FILE
MOVSI T1,'EXE' ;GET AN EXTENSION
TLNN F,FL.EXT ;EXTENSION SPECIFIED?
MOVEM T1,LERBLK+.RBEXT ;DEFAULT IT
JRST CPOPJ1 ;RETURN
SUBTTL EXE file routines -- Load and validate directory
; Read an .EXE file directory into core
; Call: PUSHJ P,EXEDIR
; <NON-SKIP> ;BAD DIRECTORY OR I/O ERROR
; <SKIP> ;DIRECTORY IN CORE
;
EXEDIR: MOVEI T1,1 ;GET STARTING BLOCK NUMBER OF DIRECTORY
PUSHJ P,FILIPS ;POSITION FOR INPUT
POPJ P, ;CAN'T
MOVE T2,CSHPAG ;GET STARTING PAGE NUMBER IN CACHE
LSH T2,11 ;CONVERT TO AN ADDRESS
MOVEM T2,DIRADR ;SAVE IT
MOVE T3,T2 ;COPY IT
SETZM DIRPGS ;CLEAR COUNT OF DIRECTORY PAGES
EXED.1: MOVE T1,DIRADR ;GET DIRECTORY BASE ADDRESS
MOVE T4,DIRPGS ;GET EXISTING COUNT OF DIRECTORY PAGES
CAIL T4,PAGCNT ;ENOUGH FREE PAGES LEFT FOR MAPPING?
ERR. (NRE,CPOPJ) ;NO ROOM TO CACHE .EXE FILE DIRECTORY
LSH T4,-11 ;CONVERT TO ADDRESS OFFSET
ADDI T1,-1(T4) ;GET ADDRESS OF AVAILABLE BUFFER
HRLI T1,-PAGSIZ ;MAKE AN IOWD
MOVEM T1,IOLIST ;SAVE IT
MOVEI T1,1(T1) ;GET ADDRESS ON NEW PAGE
LSH T1,-11 ;CONVERT TO A PAGE NUMBER
PUSHJ P,PAGCHK ;MAKE SURE THE PAGE IS THERE
POPJ P, ;CAN'T CREATE IT
PUSHJ P,FILRED ;READ A PAGE
ERR. (EIE,CPOPJ) ;.EXE FILE DIRECTORY INPUT ERROR
AOS DIRPGS ;COUNT DIRECTORY PAGES READ INTO CORE
TRZ T3,PAGSIZ-1 ;STRIP OFF INDEX INDEX INTO PAGE
ADDI T3,PAGSIZ ;ROUND UP A PAGE
EXED.2: SKIPE T1,(T2) ;END OF DIRECTORY?
JRST EXED.3 ;NO
MOVN T1,DIRPGS ;GET -NUMBER OF DIRECTORY PAGES
ADDM T1,PAGCNT ;ADJUST COUNT OF FREE PAGES
MOVNS T1 ;GET +NUMBER OF DIRECTORY PAGES
ADDM T1,CSHPAG ;UPDATE FIRST FREE PAGE FOR CACHING
JRST CPOPJ1 ;AND RETURN
EXED.3: HLRZS T1 ;KEEP JUST THE BLOCK TYPE
MOVE T4,[-EXELEN,,EXETAB] ;AOBJN POINTER TO EXE BLOCK TYPES
CAME T1,(T4) ;A MATCH?
AOBJN T4,.-1 ;LOOP
JUMPGE T4,[ERR. (BED,CPOPJ)] ;BAD EXE FILE DIRECTORY
HRRZ T1,(T2) ;GET OFFSET TO NEXT BLOCK
ADD T2,T1 ;POINT TO IT
CAMGE T2,T3 ;NEED ANOTHER DIRECTORY PAGE?
JRST EXED.2 ;CHECK OUT ALL BLOCKS
JRST EXED.1 ;GO READ ANOTHER PAGE INTO CORE
SUBTTL EXE file routines -- Find a file page
; Search a directory for a page
; Call: MOVE T1, page number
; PUSHJ P,EXEPAG
; <NON-SKIP> ;PAGE NOT FOUND, I/O ERROR
; <SKIP> ;PAGE FOUND, T1:= FILE PAGE NUMBER
;
EXEPAG: TLNN F,FL.EXE ;MAPPING AN .EXE FILE?
JRST CPOPJ1 ;NO - THEN ITS A DATA FILE
MOVE T4,T1 ;SAVE PAGE NUMBER
MOVEI T1,.SVDIR ;GET DESIRED BLOCK TYPE
PUSHJ P,EXEBLK ;SEARCH FOR IT
ERR. (BED,CPOPJ) ;BAD EXE FILE DIRECTORY
MOVE T1,T4 ;GET PAGE NUMBER BACK AGAIN
ADDI T2,1 ;POINT TO NEXT WORD
EXEP.1: HLRZ T3,.SVFPF(T2) ;GET POSSIBLE BLOCK TYPE
CAIN T3,.SVEND ;END OF DIRECTORY?
ERR. (NXA,CPOPJ) ;NON-EXISTANT ADDRESS IN FILE
LDB T3,EXEREP ;GET REPEAT COUNT
LDB T4,EXEPPN ;GET PROCESS PAGE NUMBER
ADD T4,T3 ;GET ENDING PAGE NUMBER
CAMGE T4,T1 ;HIGH PAGE LESS THAN TARGET PAGE?
JRST EXEP.3 ;YES
EXEP.2: CAMN T4,T1 ;FOUND THE PAGE WE WANT?
JRST EXEP.4 ;YES
SUBI T4,1 ;DECREMENT PAGE NUMBER
SOJGE T3,EXEP.2 ;LOOP
EXEP.3: ADDI T2,2 ;POINT TO NEXT DIRECTORY PAGE ENTRY
JRST EXEP.1 ;TRY AGAIN
EXEP.4: LDB T1,EXEFPN ;GET FILE PAGE NUMBER
ADD T1,T3 ;ADD REPEAT COUNT
JRST CPOPJ1 ;AND RETURN
; Byte pointers to directory entry parts
;
EXEREP: POINTR (.SVPPC(T2),SV%REP) ;REPEAT COUNT
EXEPPN: POINTR (.SVPPC(T2),SV%PPN) ;PROCESS PAGE NUMBER
EXEFPN: POINTR (.SVFPF(T2),SV%FPN) ;FILE PAGE NUMBER
SUBTTL EXE file routines -- Find a directory block
; Find a block in an .EXE directory
; Call: MOVE T1, block type
; PUSHJ P,EXEBLK
; <NON-SKIP> ;CAN'T FIND IT
; <SKIP> ;BLOCK FOUND
;
; On sucessful return, T1:= block type,,length and T2:= directory address
;
EXEBLK: MOVE T2,[-EXELEN,,EXETAB] ;AOBJN POINTER TO EXE BLOCK TYPES
CAME T1,(T2) ;A MATCH?
AOBJN T2,.-1 ;LOOP
JUMPGE T2,[ERR. (BED,CPOPJ)] ;BAD EXE FILE DIRECTORY
MOVE T2,DIRADR ;GET STARTING ADDRESS OF DIRECTORY
EXEB.1: SKIPN T3,(T2) ;END OF DIRECTORY?
ERR. (BED,CPOPJ) ;BAD EXE FILE DIRECTORY
HLRZS T3 ;PUT IN RH
CAMN T3,T1 ;A MATCH?
JRST EXEB.2 ;YES
HRRZ T3,(T2) ;GET LENGTH
ADD T2,T3 ;POINT TO NEXT BLOCK
JRST EXEB.1 ;LOOP
EXEB.2: MOVE T1,(T2) ;GET BLOCK TYPE,,LENGTH
JRST CPOPJ1 ;AND RETURN
; Table of legal .EXE file directory block types
;
EXETAB: EXP .SVDIR ;START OF FILE TO CORE MAP
EXP .SVEND ;END OF EXE FILE DIRECTORY
EXP .SVSTA ;ENTRY VECTOR
EXELEN==.-EXETAB ;LENGTH OF TABLE
SUBTTL FORTRAN interface
MAPD:: MOVEI .AP,@0(16) ;GET ARGUMENT POINTER
PUSHJ P,.MAPD ;DO A DEPOSIT
JRST MAPFER ;ERROR
POPJ P, ;AND RETURN
MAPE:: MOVE .AP,@0(16) ;GET ARG
PUSHJ P,.MAPE ;EXAMINE
JRST MAPFER ;ERROR
MOVE 0,.AP ;INTO 0 FOR FORTRAN FUNCTION
POPJ P, ;AND RETURN
MAPG:: MOVE .AP,@0(16) ;GET ARG
PUSHJ P,.MAPG ;GETTAB SIMULATION
JRST MAPFER
MOVE 0,.AP ;INTO 0 FOR FORTRAN FUNCTION
POPJ P, ;AND RETURN
MAPI:: MOVEI .AP,@0(16) ;ADDRESS OF ARG BLOCK
PUSHJ P,.MAPI ;INITIALIZE
JRST MAPFER ;ERROR
POPJ P, ;AND RETURN
MAPJ:: MOVEI .AP,@0(16) ;ADDRESS OF ARG BLOCK
PUSHJ P,.MAPJ ;DO A JOBPEK
JRST MAPFER ;ERROR
POPJ P, ;AND RETURN
; Here on an error. See if error dispatch provided on call
;
MAPFER: HLRE T1,-1(16) ;GET ARG COUNT
CAMLE T1,[-2] ;TWO OR MORE?
JRST MAPFE1 ;NO
MOVEI T1,@1(16) ;YES--GET DISPATCH
HRRM T1,(P) ;STUFF ON STACK
POPJ P, ;AND DISPATCH
MAPFE1: OUTSTR [ASCIZ/?Unhandled MAP error: /]
OUTSTR MAPDAT+.MPMET
OUTSTR [BYTE(7) 15,12,0]
OUTSTR MAPDAT+.MPXET
EXIT
SUBTTL Context switch
; Here to save the user's ACs and set up a new stack. This is a
; co-routine that may NOT be called recursively to save 'n' sets
; of ACs. Skip returns are handled.
; Call: PUSHJ P,CONTXT
;
CONTXT: AOSE CTXFLG ;ALREADY CONTEXT SWITCHED?
POPJ P, ;YES - THEN DO NOTHING
MOVEM 0,USRACS+0 ;SAVE AC 0
MOVE 0,[1,,USRACS+1] ;SET UP BLT
BLT 0,USRACS+17 ;SAVE ACS 1 - 17
MOVE P,[IOWD PDLSIZ,MAPPDL] ;SETUP INTERNAL PDL
MOVE F,MAPFLG ;GET MAPPING FLAGS
TLNE F,FL.RTM ;WANT TO ACCUMLATE RUNTIME?
PUSHJ P,GETRTM ;YES
SETZM MAPDAT+.MPECD ;CLEAR OUT ANY OLD ERROR CODE
SETZM MAPDAT+.MPMET ;INSURE NO JUNK MAPPING ERROR TEXT
SETZM MAPDAT+.MPXET ;INSURE NO JUNK EXTENDED ERROR TEXT
MOVE T2,USRACS+P ;GET OLD PDL POINTER
MOVEI T2,@0(T2) ;GET CALLER'S ADDRESS
PUSHJ P,(T2) ;CALL THE CALLER
TDZA T1,T1 ;INDICATE NON-SKIP RETURN
HRROI T1,-1 ;INDICATE SKIP RETURN
MOVEM T1,TFFLAG ;SET TRUE OR FALSE
TLNE F,FL.RTM ;WANT TO ACCUMLATE RUNTIME?
PUSHJ P,GETRTM ;YES
MOVEM F,MAPFLG ;UPDATE MAPPING FLAGS
MOVE 0,[USRACS+1,,1] ;SET UP BLT
BLT 0,17 ;RESTORE THE ACS
MOVE 0,USRACS+0 ;RELOAD AC 0
POP P,(P) ;PRUNE STACK
SETOM CTXFLG ;RESET CONTEXT FLAG
SKIPGE TFFLAG ;FUNCTION FAIL?
CPOPJ1: AOS (P) ;NO - THEN SKIP
CPOPJ: POPJ P, ;RETURN
GETRTM: MOVSI T2,(RN.PCN) ;RETURN PRECISION RUNTIME
RUNTIM T2, ;GET IT
EXCH T2,CPUTIM ;SAVE IT AND GET PREVIOUS
JUMPE T2,CPOPJ ;RETURN IF CALLED AT CONTEXT ENTRY
SETZ T3, ;CLEAR FOR NEXT TIME
EXCH T3,CPUTIM ;AND GET OUR RUNTIME NOW
SUB T3,T2 ;COMPUTE IMCREMENTAL
ADDM T3,MAPDAT+.MPRTM ;ACCUMULATE IT
POPJ P, ;AND RETURN
SUBTTL Error handling
ERROR: DMOVEM T1,ERRACS+0 ;SAVE T1 & T2
DMOVEM T3,ERRACS+2 ;SAVE T3 & T4
MOVEI T1,@(P) ;GET ADDRESS OF ARGUMENTS
MOVE T1,(T1) ;GET ERROR CODE,,RETURN ADDRESS
POP P,(P) ;TRIM STACK
SKIPN MAPDAT+.MPECD ;NESTED ERRORS?
HLRZM T1,MAPDAT+.MPECD ;STORE NEW ERROR CODE
HLL T1,(P) ;GET PC FLAGS OR SECTION NUMBER
EXCH T1,(P) ;SET RETURN PC AND GET PC OF ERROR
MOVEI T1,@T1 ;EXTRACT JUST THE PC
SUBI T1,2 ;POINT TO OFFENDING INSTRUCTION
MOVEM T1,ERRPC ;SAVE IT
LDB T1,[POINT 9,@ERRPC,8] ;GET THE OPCODE
SKIPE T1 ;OPCODE ZERO IS MEANINGLESS
CAILE T1,100 ;A UUO?
SKIPA
PUSHJ P,ERRUUO ;GENERATE UUO ERROR TEXT
PUSHJ P,ERRMAP ;DO THE MAPPING ERROR
DMOVE T1,ERRACS+0 ;RESTORE T1 & T2
DMOVE T3,ERRACS+2 ;RESTORE T3 & T4
POPJ P, ;AND RETURN
; Here to type specific mapping errors
;
ERRMAP: SETZM MAPDAT+.MPMET ;CLEAR THE FIRST WORD
MOVE T1,[MAPDAT+.MPMET,,MAPDAT+.MPMET+1] ;SET UP BLT
BLT T1,MAPDAT+.MPMET+.MPEWD-1 ;CLEAR ENTIRE BLOCK
SKIPN T3,MAPDAT+.MPECD ;HAVE AN ERROR?
POPJ P, ;NO
HLLZ T1,MAPERR-1(T3) ;GET PREFIX
HLRZM T1,MAPDAT+.MPPFX ;SAVE FOR CALLER
MOVEI T1,MAPDAT+.MPMET ;STORE TEXT HERE
MOVEI T2,<.MPEWD*5>-1 ;MAX NUMBER OF CHARACTERS
PUSHJ P,TXTSET ;SET IT UP
HRRZ T1,MAPERR-1(T3) ;GET ASSOCIATED ERROR TEXT
PUSHJ P,TSTRG ;TYPE IT
ERRM.1: CAIE T3,MPGUF% ;GETTAB UUO FAILURE?
JRST ERRM.2 ;NO
MOVEI T1,[ASCIZ |; table = |] ;GET TEXT
PUSHJ P,TSTRG ;TYPE IT
HRRE T1,USRACS+.AP ;GET TABLE NUMBER
PUSHJ P,OCTOUT ;TYPE IT
MOVEI T1,[ASCIZ |, index = |] ;GET TEXT
PUSHJ P,TSTRG ;TYPE IT
HLRE T1,USRACS+.AP ;GET INDEX
PUSHJ P,OCTOUT ;TYPE IT
JRST ERRM.X ;FINISH UP
ERRM.2: CAIE T3,MPDAF% ;DEPOSIT ADDRESS FAILURE?
CAIN T3,MPEAF% ;EXAMINE ADDRESS FAILURE?
SKIPA T1,USRACS+.AP ;YES--GET ARGUMENT
JRST ERRM.3 ;NO
CAIN T3,MPDAF% ;DEPOSIT?
MOVE T1,0(T1) ;GET ADDRESS
PUSH P,T1 ;SAVE IT
MOVEI T1,[ASCIZ |; address = |] ;GET TEXT
PUSHJ P,TSTRG ;TYPE IT
POP P,T1 ;RESTORE ADDRESS
PUSHJ P,PCOUT ;TYPE IT
JRST ERRM.X ;FINISH UP
ERRM.3: CAIE T3,MPMIF% ;MAPPER INITIALIZATION FAILURE
JRST ERRM.X ;NO
HRRZ T3,F ;GET MAPPING CODE
CAIE T3,.MPFIL ;FILE MODE?
JRST ERRM.X ;NO
MOVEI T1,[ASCIZ |; file = |] ;GET TEXT
PUSHJ P,TSTRG ;TYPE IT
MOVE T1,USRACS+.AP ;GET ARGUMENT ADDRESS
MOVE T1,.MPARG(T1) ;GET ADDRESS OF FILESPEC ADDRESS
SKIPE MAPDAT+.MPAFS ;HAVE ACTUAL FILESPEC YET?
MOVEI T1,MAPDAT+.MPAFS ;YES--USE THAT
PUSHJ P,TSTRG ;TYPE IT
JRST ERRM.X ;FINISH UP
ERRM.X: POPJ P, ;AND RETURN
; Table of mapping errors
;
...ERR==0
MAPERR: MERR. (BED,<Bad EXE file directory>)
MERR. (CMF,<Conflicting mapping code and flags>)
MERR. (CRP,<Cannot read default path>)
MERR. (DAF,<Deposit address failure>)
MERR. (DDI,<Double device illegal>)
MERR. (DEI,<Double extension illegal>)
MERR. (DFI,<Double file name illegal>)
MERR. (DPI,<Double path illegal>)
MERR. (DVM,<Deposit value doesn't match existing word>)
MERR. (EAF,<Examine address failure>)
MERR. (ECS,<Left eye can't SPY>)
MERR. (EIE,<EXE file directory input error>)
MERR. (GUF,<GETTAB UUO/simulation failure>)
MERR. (HAF,<Hash table/chunk allocation failure>)
MERR. (IAD,<Illegal address>)
MERR. (ICS,<Illegal cache size requested>)
MERR. (IJN,<Illegal job number>)
MERR. (IMC,<Illegal mapping code>)
MERR. (IWE,<Illegal to write Exec Virtual Memory>)
MERR. (IWU,<Illegal to write the UPMP>)
MERR. (JNA,<Job not addressable>)
MERR. (JRW,<JOBPEK UUO failed to read/write another job>)
MERR. (JSO,<Job swapped out>)
MERR. (MIF,<Mapper initialization failure>)
MERR. (NAP,<No access to requested page>)
MERR. (NEB,<No EPT for boot CPU>)
MERR. (NFC,<No free chunks for cache>)
MERR. (NRE,<No room to cache EXE file directory>)
MERR. (NSI,<Null SFD illegal>)
MERR. (NXA,<Non-existant address in file>)
MERR. (PNC,<Page not in core>)
MERR. (PSE,<Path syntax error>)
MERR. (SIR,<SPT index out of range>)
MERR. (SND,<SFDs nested too deep>)
MERR. (UPC,<Unimplemented KL paging code>)
; Here to type specific UUO error text
;
ERRUUO: PUSHJ P,UUOERR ;TRANSLATE ERROR CODE
SETZM MAPDAT+.MPXET ;CLEAR THE FIRST WORD
MOVE T1,[MAPDAT+.MPXET,,MAPDAT+.MPXET+1] ;SET UP BLT
BLT T1,MAPDAT+.MPXET+.MPEWD-1 ;CLEAR ENTIRE BLOCK
MOVEI T1,MAPDAT+.MPXET ;STORE TEXT HERE
MOVEI T2,<.MPEWD*5>-1 ;MAX NUMBER OF CHARACTERS
PUSHJ P,TXTSET ;SET IT UP
MOVEI T1,11 ;GET A <TAB>
PUSHJ P,TYO ;TYPE IT
MOVE T1,ERRNAM ;GET UUO NAME
PUSHJ P,SIXOUT ;TYPE IT
MOVEI T1,[ASCIZ | UUO error |] ;GET TEXT
PUSHJ P,TSTRG ;TYPE IT
LDB T1,[POINT 4,@ERRPC,12] ;GET UUO AC
CAIG T1,T4 ;WITHIN THE RANGE
CAIGE T1,T1 ;OF T1 - T4?
SKIPA T1,(T1) ;NO--GET THE ERROR CODE
MOVE T1,ERRACS-T1(T1) ;YES--RELOCATE AND GET THE CODE
PUSHJ P,OCTOUT ;TYPE IT
MOVEI T1,[ASCIZ | at PC |] ;GET TEXT
PUSHJ P,TSTRG ;TYPE IT
MOVE T1,ERRPC ;GET PC WHERE UUO FAILED
PUSHJ P,PCOUT ;TYPE IT
MOVEI T1,[ASCIZ |; |] ;GET SEPARATOR
PUSHJ P,TSTRG ;TYPE IT
MOVE T1,ERRTXT ;GET ADDRESS OF TEXT FOR THIS ERROR
PUSHJ P,TSTRG ;TYPE IT
PUSHJ P,TCRLF ;TYPE A CRLF
MOVEI T1,11 ;GET A TAB
PUSHJ P,TYO ;TYPE IT
MOVEI T1,VERSIO ;POINT TO OUR VERSION
PUSHJ P,TSTRG ;TYPE IT
MOVEI T1,[ASCIZ | called from PC |]
PUSHJ P,TSTRG ;TYPE TEXT
MOVE T1,USRACS+P ;GET CALLER'S STACK POINTER
MOVEI T1,@-1(T1) ;GET CALLER'S PC +1
SUBI T1,1 ;ADJUST IT
PUSHJ P,PCOUT ;TYPE THE PC
MOVEI T1,[ASCIZ |, Mode = |] ;GET TEXT
PUSHJ P,TSTRG ;TYPE IT
MOVE T1,CODTAB(F) ;GET MAPPING CODE NAME
PUSHJ P,TSTRG ;TYPE IT
MOVEI T1,[ASCIZ | (physical)|] ;MORE CHATTER
TLNE F,FL.PPM ;PHYSICAL PAGE MAPPING?
PUSHJ P,TSTRG ;YES
POPJ P, ;RETURN
; Translate UUO error code to text
; Note: GETTAB failures are not trapped here
;
UUOERR: MOVE T1,[-UUOTSZ,,UUOTAB] ;AOBJN POINTER
MOVE T2,@ERRPC ;GET UUO IN QUESTION
TDZ T2,[Z 17,@UU.PHY(17)] ;CLEAR OUT JUNK
UUOE.1: CAMN T2,0(T1) ;A MATCH?
JRST UUOE.2 ;YES
ADD T1,[2,,2] ;ACCOUNT FOR THREE WORD ENTRIES
AOBJN T1,UUOE.1 ;TRY THE NEXT ONE
MOVE T2,['??????'] ;DON'T KNOW THAT ONE
JRST UUOE.4 ;STRANGE
UUOE.2: MOVE T2,1(T1) ;GET UUO NAME
MOVE T1,2(T1) ;AOBJN POINTER TO UUO SPECIFIC TABLE
LDB T3,[POINT 4,@ERRPC,12] ;GET UUO AC
CAIG T3,T4 ;WITHIN THE RANGE
CAIGE T3,T1 ;OF T1 - T4?
SKIPA T3,(T3) ;NO--GET THE ERROR CODE
MOVE T3,ERRACS-T1(T3) ;YES--RELOCATE AND GET THE CODE
UUOE.3: HLRZ T4,(T1) ;GET AN ERROR CODE
CAMN T3,T4 ;A MATCH?
JRST UUOE.5 ;YES
AOBJN T1,UUOE.3 ;LOOP
UUOE.4: SKIPA T3,[[ASCIZ |Unknown UUO error code|]]
UUOE.5: HRRZ T3,(T1) ;GET ERROR TEXT
MOVEM T2,ERRNAM ;SAVE UUO NAME
MOVEM T3,ERRTXT ;SAVE ERROR TEXT
POPJ P, ;RETURN
UUOTAB: EXP <FILOP.>,<SIXBIT /FILOP./>,<-FOPESZ,,FOPERR>
EXP <JOBPEK>,<SIXBIT /JOBPEK/>,<-JPKESZ,,JPKERR>
EXP <PAGE. >,<SIXBIT /PAGE. />,<-PAGESZ,,PAGERR>
EXP <PATH. >,<SIXBIT /PATH. />,<-PATESZ,PATERR>
EXP <POKE. >,<SIXBIT /POKE. />,<-POKESZ,,POKERR>
UUOTSZ==.-UUOTAB
; FILOP. UUO errors
;
FOPERR: ERFNF%,,[ASCIZ |File not found|]
ERIPP%,,[ASCIZ |Incorrect PPN|]
ERPRT%,,[ASCIZ |Protection failure|]
ERFBM%,,[ASCIZ |File being modified|]
ERDNA%,,[ASCIZ |Device not available|]
ERNSD%,,[ASCIZ |No such device|]
ERWLK%,,[ASCIZ |Write-locked|]
ERSNF%,,[ASCIZ |SFD not found|]
ERSLE%,,[ASCIZ |Search list empty|]
ERLVL%,,[ASCIZ |SFD nest level too deep|]
ERNCE%,,[ASCIZ |No-creates allowed in search list|]
ERFCU%,,[ASCIZ |Can't update file|]
ERENQ%,,[ASCIZ |File has outstanding locks set|]
ERDDU%,,[ASCIZ |Device "down" and unusable|]
ERDRS%,,[ASCIZ |Device is restricted|]
ERDCM%,,[ASCIZ |Device controlled by MDA|]
ERDAJ%,,[ASCIZ |Device allocated to another job|]
ERIDM%,,[ASCIZ |Illegal I/O data mode|]
ERNPC%,,[ASCIZ |No per-process space for extended channel|]
ERNFC%,,[ASCIZ |No free channels available|]
ERACR%,,[ASCIZ |Address check reading arguments|]
ERACS%,,[ASCIZ |Address check storing answer|]
FOPESZ==.-FOPERR
; JOBPEK UUO errors
;
JPKERR: JKNPV%,,[ASCIZ |No privileges|]
JKIJN%,,[ASCIZ |Illegal job number|]
JKSWP%,,[ASCIZ |Job swapped out or in transit|]
JKIAD%,,[ASCIZ |Illegal address|]
JKDNA%,,[ASCIZ |Data not addressable|]
JKPNC%,,[ASCIZ |Page not in core|]
JKIOE%,,[ASCIZ |I/O error|]
JKABZ%,,[ASCIZ |Allocated but zero page|]
JPKESZ==.-JPKERR
; PAGE. UUO errors
;
PAGERR: PAGUF%,,[ASCIZ |Unimplemented function|]
PAGIA%,,[ASCIZ |Illegal argument|]
PAGIP%,,[ASCIZ |Illegal page number|]
PAGCE%,,[ASCIZ |Page can't exist but does|]
PAGME%,,[ASCIZ |Page must exist but doesn't|]
PAGMI%,,[ASCIZ |Page must be in core but isn't|]
PAGCI%,,[ASCIZ |Page can't be in core but is|]
PAGSH%,,[ASCIZ |Page is in a sharable high segment|]
PAGIO%,,[ASCIZ |Paging I/O error|]
PAGNS%,,[ASCIZ |No swapping space available|]
PAGLE%,,[ASCIZ |Core limit exceeded|]
PAGIL%,,[ASCIZ |Illegal if locked|]
PAGNX%,,[ASCIZ |Cannot create allocated but zero page|]
PAGNP%,,[ASCIZ |Not privileged|]
PAGESZ==.-PAGERR
; PATH. UUO errors
;
PATERR: PTNSJ%,,[ASCIZ |No such job|]
PTNAI%,,[ASCIZ |Number of arguments illegal|]
PATESZ==.-PATERR
; POKE. UUO errors
;
POKERR: PKNPV%,,[ASCIZ |No privileges|]
PKDIF%,,[ASCIZ |Old value doesn't match existing word|]
PKBAD%,,[ASCIZ |Illegal address|]
POKESZ==.-POKERR
SUBTTL AC save routines
; Save T1
;
SAVT1: PUSH P,T1 ;SAVE T1
PUSHJ P,@-1(P) ;CALL THE CALLER
SKIPA ;NON-SKIP RETURN
AOS -2(P) ;ADJUST RETURN PC
POP P,T1 ;RESTORE T1
SUB P,[1,,1] ;ADJUST STACK
POPJ P, ;RETURN
; Save T1 and T2
;
SAVT2: ADD P,[2,,2] ;ADJUST STACK
DMOVEM T1,-1(P) ;SAVE T1 AND T2
PUSHJ P,@-2(P) ;CALL THE CALLER
SKIPA ;NON-SKIP RETURN
AOS -3(P) ;ADJUST RETURN PC
DMOVE T1,-1(P) ;RESTORE T1 AND T2
SUB P,[3,,3] ;ADJUST STACK
POPJ P, ;RETURN
; Save T1, T2, and T3
;
SAVT3: ADD P,[3,,3] ;ADJUST STACK
DMOVEM T1,-2(P) ;SAVE T1 AND T2
MOVEM T3,0(P) ;SAVE T3
PUSHJ P,@-3(P) ;CALL THE CALLER
SKIPA ;NON-SKIP RETURN
AOS -4(P) ;ADJUST RETURN PC
DMOVE T1,-2(P) ;RESTORE T1 AND T2
MOVE T3,0(P) ;RESTORE T3
SUB P,[4,,4] ;ADJUST STACK
POPJ P, ;RETURN
; Save T1, T2, T3, and T4
;
SAVT4: ADD P,[4,,4] ;ADJUST STACK
DMOVEM T1,-3(P) ;SAVE T1 AND T2
DMOVEM T3,-1(P) ;SAVE T3 AND T4
PUSHJ P,@-4(P) ;CALL THE CALLER
SKIPA ;NON-SKIP RETURN
AOS -5(P) ;ADJUST RETURN PC
DMOVE T1,-3(P) ;RESTORE T1 AND T2
DMOVE T3,-1(P) ;RESTORE T3 AND T4
SUB P,[5,,5] ;ADJUST STACK
POPJ P, ;RETURN
; Save F
;
SAVEF: PUSH P,F ;SAVE F
PUSHJ P,@-1(P) ;CALL THE CALLER
SKIPA ;NON-SKIP RETURN
AOS -2(P) ;ADJUST RETURN PC
POP P,F ;RESTORE F
SUB P,[1,,1] ;ADJUST STACK
POPJ P, ;RETURN
SUBTTL Literals
LIT
MPHEND::! ;END OF THE HIGH SEGMENT
HGHSIZ==MPHEND-HGHORG ;LENGTH OF THE HIGH SEGMENT
SUBTTL Data storage
RELOC 0 ;LOW SEGMENT
MAPARG::BLOCK .MPMAX ;PLACE FOR PEOPLE TO PUT ARG BLOCKS
ZBEG:! ;START OF DATA TO ZERO
MAPDAT::BLOCK .MPLEN ;DATA TABLE
CTXFLG: BLOCK 1 ;CONTEXT FLAG
USRACS: BLOCK 20 ;USER'S ACS
MAPPDL: BLOCK PDLSIZ ;INTERNAL PDL
TFFLAG: BLOCK 1 ;TRUE/FALSE FLAG
CPUTIM: BLOCK 1 ;USED FOR RUNTIM ACCUMULATION
ERRACS: BLOCK 4 ;ERROR ACS (T1 - T4)
ERRPC: BLOCK 1 ;ERROR PC
ERRNAM: BLOCK 1 ;NAME OF UUO
ERRTXT: BLOCK 1 ;ADDRESS OF UUO ERROR TEXT
POKBLK: BLOCK 3 ;POKE. UUO BLOCK
CPYBLK: BLOCK .CBXLN ;COPY BLOCK
JPKFLG: BLOCK 1 ;JOBPEK FLAG WORD
MAPFLG: BLOCK 1 ;MAPPING FLAGS
USRJOB: BLOCK 1 ;USER JOB NUMBER
UUOARG: BLOCK 2 ;UUO ARGUMENTS
HASHTA: BLOCK 1 ;HASH TABLE ADDRESS
HASHTL: BLOCK 1 ;HASH TABLE LENGTH
HASHCA: BLOCK 1 ;ADDRESS OF FIRST CHUNK
HASHCL: BLOCK 1 ;LENGTH OF CHUNK AREA
PAGCNT: BLOCK 1 ;COUNT OF AVAILABLE PAGES FOR MAPPING
CSHXCT: BLOCK 1 ;INSTRUCTION TO TEST PHYSICAL PAGE BIT
CSHPAG: BLOCK 1 ;FIRST PAGE NUMBER FOR MAPPING
CBHEAD: BLOCK .CBLEN ;CACHE BLOCK LIST HEADER
PAGFUN: BLOCK 1 ;FUNNY PAGE UPT OFFSET
PAGFLG: BLOCK 1 ;PAGE MAP ENTRY FLAG
PAGIDX: BLOCK 1 ;SECONDARY PAGE MAP INDEX
JOBN: BLOCK 1 ;NUMBER OF JOBS IN THE SYSTEM
SEGN: BLOCK 1 ;NUMBER OF SEGMENTS IN THE SYSTEM
KLPFLG: BLOCK 1 ;KL PAGING FLAG
EDVADR: BLOCK 1 ;EDV ADDRESS
EDVCNT: BLOCK 1 ;EDV COUNT WORD
EDVDAT: BLOCK 1 ;EDV FLAGS AND CPU DATA WORD
EPTADR: BLOCK 1 ;EPT ADDRESS
SPTADR: BLOCK 1 ;SPT ADDRESS
NUMTAB: BLOCK 1 ;POINTER TO NUMTAB IN THE MONITOR
RNGTAB: BLOCK 1 ;POINTER TO RNGTAB IN THE MONITOR
JBTSGN: BLOCK 1 ;POINTER TO JBTSGN IN THE MONITOR
JBTPDB: BLOCK 1 ;POINTER TO JBTPDB IN THE MONITOR
JBTADR: BLOCK 1 ;POINTER TO JBTADR IN THE MONITOR
JBTUPM: BLOCK 1 ;POINTER TO JBTUPM IN THE MONITOR
HIORG: BLOCK 1 ;MONITOR'S HIGH SEGMENT ORIGIN
HIFLAG: BLOCK 1 ;HIGH SEGMENT MAPPED FALG
HGHUEA: BLOCK 1 ;HIGHEST UNMAPPED EXEC ADDRESS
PPABEG: BLOCK 1 ;BEGINING PER-PROCESS ADDRESS
PPAEND: BLOCK 1 ;ENDING PER-PROCESS ADDRESS +1
GTBARG: BLOCK 1 ;GETTAB ARGUMENT
GTBNUM: BLOCK 1 ;NUMTAB ENTRY FOR CURRENT GETTAB
GTBIDX: BLOCK 1 ;INDEX INTO GETTAB DISPATCH TABLE
GTBRNG: BLOCK 1 ;LOWER,,UPPER LIMIT FOR RANGE
BYTPTR: BLOCK 1 ;BYTE POINTER
BYTCNT: BLOCK 1 ;BYTE COUNT
FILCHN: BLOCK 1 ;FILE CHANNEL NUMBER
IOLIST: BLOCK 2 ;IOWD
DIRADR: BLOCK 1 ;.EXE DIRECTORY ADDRESS
DIRPGS: BLOCK 1 ;NUMBER OF PAGES IN .EXE DIRECTORY
FOPBLK: BLOCK FOPSIZ ;FILOP. UUO BLOCK
LERBLK: BLOCK LERSIZ ;LOOKUP/ENTER UUO BLOCK
PTHBLK: BLOCK PTHSIZ ;PATH. UUO BLOCK
FILBLK: BLOCK FILSIZ ;BLOCK TO RETURN FULL FILESPEC
FILPPN: BLOCK 1 ;DEFAULT PPN
ZEND:! ;END OF DATA TO ZERO
SUBTTL End
END
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