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Resource forks are included only for .rsrc files. These are DeRezzed into their data fork. 'ckid' resources, from the Projector VCS, are not included. The Tools directory, containing mostly junk, is also excluded.
192 lines
5.9 KiB
Plaintext
192 lines
5.9 KiB
Plaintext
;
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; File: BootItt.a
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;
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; Contains: Code to stuff d5 with a scsi id and jump to a driver
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;
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; Author: Clinton Bauder
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;
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; Copyright: © 1992-1993 by Apple Computer, Inc., All rights reserved.
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;
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; Change History (most recent first):
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;
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; <SM14> 10/14/93 pdw <MC> roll-in.
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; <MC2> 10/12/93 pdw Added support for Synchronous data transfers, rewrote State
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; Machine, message handling etc.
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; <SM13> 9/9/93 pdw Lots of little changes. Name changes, temporary cache_bug
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; stuff.
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; <SM12> 8/23/93 pdw Added support for LimitPRAMClear, IgnoreCmdOptShDel,
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; LoadDefaultOnly - three options required for AIX security,
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; enabled by setting bits in PRAM $76.
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; <SM11> 7/8/93 pdw Added LdD- and -LdD events to trace when drivers are being
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; called.
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; <SM10> 6/29/93 pdw Massive checkins: Change asynchronicity mechanism to CallMachine
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; stack switching mechanism. Adding support for Cold Fusion.
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; Rearranging HW/SW Init code. Some code optimizations.
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; <SM9> 5/29/93 PW Added line to change TheZone as well as AppZone after driver is
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; run.
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; <SM8> 5/5/93 PW Converted names to meanies-friendly names. Updated with latest
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; from Ludwig stuff.
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; <LW2> 2/2/93 DCB Saved registers around call to driver install to fix Radar bug
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; #1063405
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; <SM6> 2/1/93 PW Update from the latest of Ludwig. Also changes required for PDM
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; (will update Ludwig with these as needed myself).
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; <SM5> 12/1/92 PW Added applZone/sysZone stuff after returning from driver to fix
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; multiple drives not mounting bug.
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; <SM4> 10/30/92 DCB Changed to reflect new name for scsi.a
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; <SM3> 8/20/92 DCB Fixed a checksum problem
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; <SM2> 7/28/92 PW Added comment.
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; <0> 6/5/92 DCB New today.
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;
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;==========================================================================
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MACHINE MC68020 ; '020-level
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BLANKS ON ; assembler accepts spaces & tabs in operand field
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PRINT OFF ; do not send subsequent lines to the listing file
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; don't print includes
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CASE OBJECT ; preserve case in object file
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IMPORT RecordEvent
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;--------------------------------------------------------------------------
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LOAD 'StandardEqu.d'
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INCLUDE 'Debug.a' ; for NAME macro
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INCLUDE 'SCSI.a' ; <SM4>
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INCLUDE 'ACAM.a'
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;--------------------------------------------------------------------------
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JmpToDrvr PROC EXPORT
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MOVE.L D5,-(SP) ; Save d5
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MOVE.L D7,-(SP) ; Save d7
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move.l 12(sp), D5 ; get the SCSI ID or Device Ident
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MOVE.L 20(SP),A0 ; Get Block zero
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MOVE.L SBData(A0),D7 ; save the default data area (Does anybody use this ?)
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MOVE.L 24(SP),A0 ; Get the partition map entry
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MOVE.l 16(SP),A1 ; get the driver
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IF RECORD_ON THEN
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pea 'LdD-'
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move.l D5, -(SP)
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bsr RecordEvent
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addq.l #8, sp
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ENDIF
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MOVEM.L A0-A6/D1-D7,-(SP) ; save everything dammit! <LW2>
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JSR (A1) ; install it
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MOVEM.L (SP)+,A0-A6/D1-D7 ; restore everything. <LW2>
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IF RECORD_ON THEN
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pea '-LdD'
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move.l A1, -(SP)
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bsr RecordEvent
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addq.l #8, sp
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ENDIF
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; Make the System Heap growable by making the App Heap and TheZone the same zone as the System.
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MOVE.L SysZone,A0 ; which zone is the system zone
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MOVE.L A0,TheZone ; make THE REAL zone that zone
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MOVE.L A0,ApplZone ; good-bye to the app zone (make it same zone)
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MOVE.L bkLim(A0),HeapEnd ; end of System heap is now end of App Heap.
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MOVE.L (SP)+,D7 ; restore d7
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MOVE.L (SP)+,D5 ; restore d5
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RTS ; adios
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NAME 'JmpToDrvr'
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CheckSumDrvr PROC EXPORT
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MOVE.L D7,-(SP) ; save D7
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MOVE.L 12(SP),D1 ; the size of the driver in bytes
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MOVE.L 8(SP),a0 ; the driver itself
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;
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; Checksum routine added <A311/31Oct86>. It uses the algorithm in the
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; partition design document. On entry, a0 points to the driver and d1
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; has the size in bytes (word quantity).
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;
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; Returns 16-bit checksum in d0. Destroys d1,d7,a0.
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;
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DoCksum
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moveq.l #0,d0 ; initialize sum register
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moveq.l #0,d7 ; zero-extended byte
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bra.s CkDecr ; handle 0 bytes <A349/04Nov86>
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CkLoop
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move.b (a0)+,d7 ; get a byte
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add.w d7,d0 ; add to checksum
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rol.w #1,d0 ; and rotate
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CkDecr
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dbra d1,CkLoop ; next byte
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tst.w d0 ; convert a checksum of 0
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bne.s @1 ; into $FFFF (as per
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subq.w #1,d0 ; algorithm description).
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@1
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MOVE.L (SP)+,D7 ; restore D7
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rts
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NAME 'CheckSumDrvr'
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;________________________________________________________________________________________
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;
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; Routine: Ck4IgnoreCmdShOptDel
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;
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; Inputs: none
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;
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; Outputs: Z: NE = ignore
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; EQ = don't ignore
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; D0: NE = ignore
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; EQ = don't ignore
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;
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; Trashes: D0, A0
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;
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;________________________________________________________________________________________
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Ck4IgnoreCmdShOptDel PROC EXPORT
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subq.w #2,sp ; allocate buffer on stack
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movea.l sp, A0 ; get buffer ptr
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MOVE.L #$00010076, D0 ; Read 1 bytes starting at loc $76
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_ReadXPRam
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move.b (sp)+, D0
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and.b #4, D0 ; bit 2
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rts
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NAME 'Ck4IgnoreCmdShOptDel'
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ENDPROC
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;________________________________________________________________________________________
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;
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; Routine: Ck4OnlyLoadFromDefault
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;
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; Inputs: none
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;
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; Outputs: Z: NE = only load/boot from Default device
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; EQ = boot from Floppy or Default
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; D0: NE = only load/boot from Default device
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; EQ = boot from Floppy or Default
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;
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; Trashes: D0, A0
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;
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;________________________________________________________________________________________
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Ck4OnlyLoadFromDefault PROC EXPORT
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subq.w #2,sp ; allocate buffer on stack
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movea.l sp, A0 ; get buffer ptr
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MOVE.L #$00010076, D0 ; Read 1 bytes starting at loc $76
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_ReadXPRam
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move.b (sp)+, D0
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and.b #2, D0 ; bit 1
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rts
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NAME 'Ck4OnlyLoadFromDefault'
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ENDPROC
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END
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