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supermario/base/SuperMarioProj.1994-02-09/OS/SCSIMgr4pt3/SCSIGlue.a
Elliot Nunn 2e16381318 Bring in sources, and document
2019-06-29 23:17:50 +08:00

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;==========================================================================
;
; File: SCSIGlue.a
;
; Contains: Entry glue for A089 trap and other misc.
;
; Written by: Paul Wolf
;
; Copyright: © 1991-1994 by Apple Computer, Inc., All rights reserved.
;
; Change History (most recent first):
;
; <SM28> 1/31/94 DCB Added a semaphore around the call to jSCSIFreeHook so we don't
; do a trap to DeferUserFn every time sync safe becomes zero.
; <ML4> 1/5/94 pdw (DCB) Added calling of SCSIFreeHook from VMEnableUserCode when we go
; sync-safe and old API is not busy.
; <SM26> 12/19/93 DCB Call jSCSIFreeHook from VMEnableUserCode if syncUnsafe is zero
; and if our SCSIBusy patch was called when syncUnsafe was
; non-zero.
; <SM25> 11/22/93 pdw Rolling in from <MCxx>.
; <MC6> 11/8/93 pdw Changed recording criteria.
; <SM24> 11/21/93 pdw Removed IllegalInstruction and UnimplentedATrap procedures.
; <SM23> 11/19/93 chp Hacked some more on TestFor_GrandCentralExists. The TestFor
; macro looks in DecoderInfo, so I use DecoderInfoVers to validate
; 96-bit Universal info rather than ProductInfoVers.
; <SM22> 11/17/93 DCB Changing TestFor_GrandCentralExists so that it works on
; pre-SuperMario ROMs. This is necessary for the INIT version of
; the code.
; <SMG3> 9/22/93 chp Implement a TestFor for Grand Central.
; <SM20> 10/29/93 DCB <MC> roll-in.
; <MC4> 10/28/93 pdw Changed recording.
; <SM19> 10/15/93 pdw Added the tst.b -300(sp) to the SCSIAtomic call glue to avoid
; any stack paged out problems.
; <SM18> 10/14/93 pdw Added support for Synchronous data transfers, rewrote State
; Machine, message handling etc.
; <SM17> 9/9/93 pdw Lots of little changes. Name changes, temporary cache_bug
; stuff.
; <SM16> 8/23/93 DCB Fixing TestFor_djMEMCExists to so that uses UnivROMFlags.
; <SM15> 8/13/93 pdw Added -exists to TestFor_Orwell.
; <SM14> 7/17/93 pdw Added VMRunning routine.
; <SM13> 6/29/93 pdw Massive checkins: Change asynchronicity mechanism to CallMachine
; stack switching mechanism. Adding support for Cold Fusion.
; Rearranging HW/SW Init code. Some code optimizations.
; <SM12> 5/25/93 DCB Rollin from Ludwig. (The next item below)
; <LW11> 5/21/93 PW Changing VM-ON check to use $B78<0 instead of $CF0=-1.
; <SM11> 5/5/93 PW Adding IllegalInstr() function.
; <SM10> 5/5/93 PW Converted names to meanies-friendly names. Updated with latest
; from Ludwig stuff.
; <LW10> 5/1/93 PW Got rid of RECORD_ON and RECORD_rCMD definitions (should only be
; in Debug.a now.
; <LW9> 4/30/93 DCB Changing default RECORD_ON to 0 for final Candidate
; <LW7> 4/14/93 DCB Added the CallOldXPT function to facillitate switching from one
; XPT to another.
; <LW6> 3/8/93 PW Recording EnVM and DsVM again.
; <LW5> 2/17/93 PW Added TestFor_HMCDecoder for PDM support.
; <SM9> 4/8/93 DCB Added TestForDJMEMC and TestForOrwell to identify Wombats
; <SM8> 1/31/93 PW Update from the latest of Ludwig. Also changes required for PDM
; (will update Ludwig with these as needed myself).
; <LW4> 1/27/93 PW Changed values for 'EnVM' and 'DsVM' events to include VM's
; UserCodeDisabled value. Removed EnV0 check and event. Made EnVM
; return void again.
; <LW3> 1/12/93 DCB Changed ifdefs for RECORD_ON so that the makefile will turn them
; on and off correctly.
; <LW2> 12/18/92 PW Added general SyncRequestsEnabled counter support to fix
; SCSIGets at VBL time bug.
; <SM7> 12/5/92 PW Changed to default to recording A089 traps.
; <SM6> 12/5/92 PW Changed the record_event for A089.
; <SM5> 11/20/92 DCB Moved the VM stuff here where it belongs
; <SM4> 10/30/92 DCB Changed the record data for 'AO89' tape entry
; <SM3> 8/24/92 PN Take out CycloneboxEVT1 stuff
; <SM2> 7/28/92 PW Added onEVT1 check routine so that InitItt can choose not to
; install Itt if on an EVT1.
; <SM1> 7/25/92 PW New Today.
;
;==========================================================================
MACHINE MC68020 ; '020-level
BLANKS ON ; assembler accepts spaces & tabs in operand field
PRINT OFF ; do not send subsequent lines to the listing file
; don't print includes
CASE OBJECT ; preserve case in object file
LOAD 'StandardEqu.d' ; from StandardEqu.a and for building ROMs
INCLUDE 'HardwarePrivateEqu.a'
INCLUDE 'SysPrivateEqu.a'
INCLUDE 'UniversalEqu.a' ; for TestFor
INCLUDE 'Debug.a' ; for NAME macro
INCLUDE 'ACAM.a'
INCLUDE 'SCSI.a' ; for scsiBPhysical
INCLUDE 'XPTEqu.a'
IMPORT RecordEvent
VMGlobals EQU $B78 ;!!! until I update InternalOnlyEqu.a
VMVectors EQU $CF0 ; pointer to VM vector table
;--------------------------------------------------------------------------
******** Entry point from A089 Trap *************
SCSIAtomic PROC EXPORT
IMPORT SCSITrap: CODE
IF CALL_RECORD_ON THEN
pea 'A089'
move.l SCSI_IO.scsiDevice(A0), -(sp)
move.b SCSI_IO.scsiFunctionCode(A0), (sp) ;into diReserved
bsr RecordEvent
addq.l #8, sp
move.l A0, -(sp)
move.l sp, -(sp)
bsr RecordEvent
addq.l #8, sp
ENDIF
; let's make sure that there's enough stack space paged in for us to use.
; this is desired because of the enormous number of non-driver clients
; that don't hold the stack when making SCSI calls
tst.b -$300(sp)
; push parameters and call SCSITrap
move.l A0, -(sp) ; store SCSI_PB argument on the stack
move.l D0, -(sp) ; store scsiSelector argument on the stack
bsr.w SCSITrap ; call the SCSITrap in the SCSI manager
; result in D0.L
add.l #8, sp ; pop-off arguments
rts
NAME 'SCSIAtomic'
ENDPROC
;———————————————————————————————————————————————————————————————————————
TestFor_SCSI96_1Exists PROC EXPORT
;———————————————————————————————————————————————————————————————————————
;
moveq.l #0, D0
TestFor SCSI96_1Exists
sne D0
rts
NAME 'TestFor_SCSI96_1Exists'
;———————————————————————————————————————————————————————————————————————
TestFor_SCSI96_2Exists PROC EXPORT
;———————————————————————————————————————————————————————————————————————
;
moveq.l #0, D0
TestFor SCSI96_2Exists
sne D0
rts
NAME 'TestFor_SCSI96_2Exists'
;———————————————————————————————————————————————————————————————————————
TestFor_PSCExists PROC EXPORT
;———————————————————————————————————————————————————————————————————————
;
moveq.l #0, D0
TestFor PSCExists
sne D0
rts
NAME 'TestFor_PSCExists'
ENDP
;———————————————————————————————————————————————————————————————————————
TestFor_HMCDecoder PROC EXPORT
;———————————————————————————————————————————————————————————————————————
;
moveq.l #0, D0
TestFor HMCDecoder ; are we PDM ?
sne D0
rts
NAME 'TestFor_HMCDecoder'
ENDP
;———————————————————————————————————————————————————————————————————————
TestFor_OrwellExists PROC EXPORT
;———————————————————————————————————————————————————————————————————————
;
moveq.l #0, D0
TestFor OrwellExists ; are we Quadra ?
sne D0
rts
NAME 'TestFor_OrwellExists'
ENDP
;———————————————————————————————————————————————————————————————————————
TestFor_djMEMCExists PROC EXPORT
;———————————————————————————————————————————————————————————————————————
;
move.l UnivROMFlags, D0
btst.l #ProductInfo.djMEMCChipBit, D0
sne D0
rts
NAME 'TestFor_djMEMCExists'
ENDP
;———————————————————————————————————————————————————————————————————————
TestFor_GrandCentralExists PROC EXPORT
;———————————————————————————————————————————————————————————————————————
;
; First make sure the ROM has 96-bit AddrMapFlags.
;
moveq #0,d0
movea.l UnivInfoPtr,a0
adda.l ProductInfo.DecoderInfoPtr(a0),a0
tst.b DecoderInfo.DecoderInfoVers(a0)
beq.b @exit
TestFor GrandCentralExists
sne d0
@exit rts
NAME 'TestFor_GrandCentralExists'
ENDP
;**************************************************************************
;
; VMEnableUserCode, VMDisableUserCode -
;
;==========================================================================
; Pointer to V_UserCode is stored at *VMVECTORS + 0x48;
; Pointer to userCodeDisabled is stored at *VMG + 0x48;
; Pointer to pageFaultFatal is stored at *VMG + 0x4a;
;———————————————————————————————————————————————————————————————————————
VMEnableUserCode PROC EXPORT
move.l ([SCSIGlobals],SCSIGlobalsRec.xptGlobals), A0
subq.w #1, XPTglobals.syncUnsafeCount(A0)
bhs.s @cool
moveq.l #0, D0
move.w D0, XPTglobals.syncUnsafeCount(A0)
IF 1 AND RECORD_ON THEN ; <SM3>
pea 'EnV0'
pea 0
move.w XPTglobals.syncUnsafeCount(A0), 2(sp)
tst.l VMGlobals
bmi.s @10
move.l VMGlobals, A0
move.b $49(A0), (sp)
move.b $4b(A0), 1(sp)
@10
bsr RecordEvent
addq.l #8, sp
ENDIF
IfDebugStr 'syncUnsafeCount gone negative'
bra.s @exitVMEn
@cool
IF 0 AND RECORD_ON THEN ; <SM3>
pea 'EnVM'
pea 0
move.w XPTglobals.syncUnsafeCount(A0), 2(sp)
tst.l VMGlobals
bmi.s @11
move.l VMGlobals, A0
move.b $49(A0), (sp)
move.b $4b(A0), 1(sp)
@11
bsr RecordEvent
addq.l #8, sp
ENDIF
tst.l VMGlobals
bmi.s @1
move.l #1, -(sp)
move.l VMVECTORS, a0
move.l $48(a0), A0
jsr (a0)
addq.l #4, sp
@1
tst.l XPTglobals.syncUnsafeCount(A0) ; Safe?
bne.b @2
btst #kbOldAPIBusy, XPTglobals.flags(A0) ; old API clear?
bne.b @2
IF 0 AND RECORD_ON THEN
pea 'Free'
pea 0
move.w ([SCSIGlobals],XPTglobals.syncUnsafeCount), 2(sp)
tst.l VMGlobals
bmi.s @12
move.l VMGlobals, A0
move.b $49(A0), (sp)
move.b $4b(A0), 1(sp)
@12
bsr RecordEvent
addq.l #8, sp
ENDIF
jsr callFreeHook ; Tell File Mgr what's up
@2
moveq.l #1, D0
@exitVMEn
rts
NAME 'VMEnableUserCode'
callFreeHook
move.l SCSIGlobals, a0 ; aquire our globals
bclr.b #0,SCSIGlobalsRec.ciWasBusy(a0); do we need to call the free hook?
beq.b @Done ; nope
bset.b #1,SCSIGlobalsRec.ciBusyPending(a0) ; test and set the freehook pending flag
bne.s @Done ; one already pending - done
lea PostFreeHook,a0 ; get addr of routine to execute
_DeferUserFn ; execute deferred
@Done
rts
NAME 'callFreeHook'
PostFreeHook
movea.l ExpandMem,a0 ; a0 = ptr to expand mem
move.l ExpandMemRec.jSCSIFreeHook(a0),d0 ; d0 = SCSI free vector
beq.s @Done ; no freehook to execute
movea.l d0,a0
jsr (a0) ; execute "jSCSIFreeHook"
@Done
move.l SCSIGlobals, a0 ; aquire our globals
clr.b SCSIGlobalsRec.ciBusyPending(a0) ; clear pending flag
rts
NAME 'PostFreeHook'
ENDP
;———————————————————————————————————————————————————————————————————————
VMDisableUserCode PROC EXPORT
IF 0 AND RECORD_ON THEN
pea 'DsVM'
pea 0
move.w XPTglobals.syncUnsafeCount(A0), 2(sp)
tst.l VMGlobals
bmi.s @12
move.l VMGlobals, A0
move.b $49(A0), (sp)
move.b $4b(A0), 1(sp)
@12
bsr RecordEvent
addq.l #8, sp
ENDIF
tst.l VMGlobals
bmi.s @1
clr.l -(sp)
move.l VMVECTORS, a0
move.l $48(a0), A0
jsr (a0)
addq.l #4, sp
@1
move.l ([SCSIGlobals],SCSIGlobalsRec.xptGlobals), A0
addq.w #1, XPTglobals.syncUnsafeCount(A0)
bcc.s @cool
IfDebugStr 'syncUnsafeCount gone big!'
moveq #dsIOCoreErr, D0
_SysError
@cool
rts
NAME 'VMDisableUserCode'
ENDP
;———————————————————————————————————————————————————————————————————————
CallOldXPT PROC EXPORT
;———————————————————————————————————————————————————————————————————————
;
move.l 12(sp),a1 ; get the XPT
move.l 8(sp),d0 ; get the scsiSelector
move.l 4(sp),a0 ; get the parameter block
jmp (a1) ; jump to it
RTSNAME 'CallOldXPT'
ENDP
;———————————————————————————————————————————————————————————————————————
VMRunning PROC EXPORT
;———————————————————————————————————————————————————————————————————————
tst.l VMGlobals
spl D0 ; if plus, D0 gets set (i.e. VM is on)
rts
NAME 'VMRunning'
ENDP
END
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