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A2osX/SYS/KERNEL.S.CORE.txt
burniouf 1e404b5bcf KERNEL:IRQ mode for IIgs (not yet preemptive) 
CC:most of it working, many bugs remain
DAN2ETH.DRV:broken, lot of debug code included
2023-01-11 19:34:34 +01:00

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NEW
AUTO 3,1
*--------------------------------------
CORE.Run ldx #1
bra .80 Skip PS0
.1 stx CORE.PSIndex
lda PS.Table.hPS,x
beq .8
jsr K.GetMemPtr
>STYA pPs
lda (pPS) get S.PS.F
* bit #S.PS.F.HOLD Waiting for Another Task to Terminate?
* beq .2
bpl .2
ldy #S.PS.CPID
lda (pPS),y
jsr CORE.GetPS
bcc .8 yes, still running....
lda (pPS) get S.PS.F again
eor #S.PS.F.HOLD unmark as HOLD
sta (pPS)
.2 jsr CORE.PSSelect Restore ZP & Ptrs
.3 jsr CORE.PSExec INIT/RUN/QUIT/RESUME
dec IRQ.InKernel
bcc .4 INIT/RUN Exit ?
jsr CORE.UpdPPS Yes, go Update Parent PS
ldy #S.PS.S
lda #S.PS.S.QUIT
sta (pPS),y
bra .3 try executing QUIT now...
.4 lda (pPS)
bit #S.PS.F.SLEEP
bne .7
ldy #S.PS.S
lda (pPS),y
bne .5
lda #S.PS.S.RUN go from INIT to RUN
sta (pPS),y
bra .7
.5 cmp #S.PS.S.QUIT
bne .7
ldy #S.PS.PID
lda (pPS),y
cmp #1 INITD ?
bne .6
jmp CORE.Quit
.6 >PUSHA PID
>PUSHBI 2 SIG
>SYSCALL2 Kill
bra .8
.7 jsr CORE.PSLeave Save ZP & Ptrs
.8 ldx CORE.PSIndex
inx
.80 cpx CORE.PSCount
bne .1
*--------------------------------------
CORE.Events jsr CORE.GetEvents
bcs .4 CS=no event
jsr CORE.Dispatch
bcc .4 CC=All Events Dispatched
lda PS.Table.PID Select PS0
jsr K.GetMemPtr
>STYA pPs
>LDYAI K.STACKTOP
>STYA pStack
lda #Evt.Table
sta pEvent
.1 lda (pEvent)
beq .3
bpl .3
jsr CORE.DestroyEvent Discard any timer event
.3 lda pEvent
clc
adc #S.EVT
sta pEvent
lda CORE.EvtCount
bne .1
*--------------------------------------
.4 bit OPENAPPLE
bpl .8
lda KBD
bpl .8
cmp #"0"
bcc .8
cmp #"9"+1
bcs .8
sta KBDSTROBE
and #$0F
cmp A2osX.ASCREEN Same as active screen...nothing to do
beq .8
tax
lda A2osX.SCRNDEVS,x Get DevID
beq .8 No device claimed this screen
>PUSHA
>PUSHBI IOCTL.CONTROL request
>PUSHWZ Param
>SYSCALL2 IOCTL
.8 jmp CORE.Run
*--------------------------------------
CORE.Quit php
sei
jsr CORE.IRQOff
plp
lda IRQ.INTNUM
sta K.MLI.PARAMS+1
>MLICALL MLIDEALLOCIRQ
bit RDIOUDIS
sta SETIOUDIS
sta CLRDHIRES
bmi .1
sta CLRIOUDIS
.1 ldx #5
.2 stz K.MLI.PARAMS+1,x
dex
bpl .2
lda #4
ldx #MLIQUIT
jmp GP.MLICall
*--------------------------------------
CORE.UpdPPS tax save RC From INIT or RUN
ldy #S.PS.PPID Notify Parent Process for exit code...
lda (pPS),y
beq .8 no parent process
jsr CORE.GetPSByID X unmodified
bcs .8 parent is dead.....skipping...
>STYA ZPPtr1
lda (ZPPtr1) Parent PS is HOLD?
* bit #S.PS.F.HOLD
* beq .8 no...
bpl .8
ldy #S.PS.CPID
lda (ZPPtr1),y
dey #S.PS.PID
cmp (pPS),y
bne .8 Hold, but not waiting this PS
txa waiting for this PS to terminate....
ldy #S.PS.RC give it RC
sta (ZPPtr1),y
lda (ZPPtr1)
eor #S.PS.F.HOLD release Parent PS HOLD...
sta (ZPPtr1)
* clc
.8 rts
*--------------------------------------
* CORE.GetEvents :
* IN :
* OUT :
* CS = no event, A = ERROR
* CC * event in YA
* (pEvent)
*--------------------------------------
CORE.GetEvents lda #Evt.Table
sta pEvent point to start of event list
stz CORE.EvtCount reset Size
bit A2osX.IRQMode do we have IRQ enabled for Ticks ?
bpl .1 no, regular poll
lda IRQ.Tick a Tick ?
beq .8 no, no event
dec IRQ.Tick
bra .2
.1 lda VBL get VLINE status
tax
eor CORE.VBLState
bpl .8 no change,no tick
txa
sta CORE.VBLState save new
bpl .8 Up2down transition,no tick
.2 lda #0
dec CORE.TickSec
bne .3 not yet One Sec
lda IRQ.Mode
eor #$C0
sta IRQ.Mode
ldx A2osX.ASCREEN /DEV/CONSOLE
bne .22
sta SYS.BASL0+38
.22 ldx CORE.TickPerSec
stx CORE.TickSec
lda #S.EVT.F.T1SEC
bra .4 Force Resync T1 & T10...
.3 dec CORE.Tick10t
bne .6
.4 inc DevMgr.Timer
inc A2osX.TIMER16
bne .5
inc A2osX.TIMER16+1
.5 ldx CORE.TickPer10t
stx CORE.Tick10t
ora #S.EVT.F.T10TH
.6 tax Finally, do we have an event ?
beq .8 no....
sta (pEvent)
inc CORE.EvtCount Add one event to Queue
* lda pEvent
* clc
* adc #S.EVT
* sta pEvent if CS, EVT queue full!!! ($100)
* MORE EVENT PROCESSING HERE
.8 lda CORE.EvtCount if 0, exit with CS (from cmp), and A=0 "no event"
beq .9
clc
rts
.9 sec
rts
*--------------------------------------
* CORE.Dispatch
* IN:
* OUT:
* CS: Not Dispatched
* CC: Event Cleared
*--------------------------------------
CORE.Dispatch ldx #1 skip PS0
bra .80
.1 stx CORE.PSIndex
lda PS.Table.hPS,x
beq .5
jsr K.GetMemPtr
>STYA pPS
lda (pPS)
bit #S.PS.F.EVENT Accept Events ?
beq .5
ldy #S.PS.S
lda (pPS),y
cmp #S.PS.S.RUN
bne .5
lda #S.PS.S.DOEVENT Flag this PS for IRQ Mgr
sta (pPS),y
jsr CORE.PSSelect
lda #Evt.Table
sta pEvent Select first event in list
lda CORE.EvtCount
sta CORE.EvtIndex
.2 lda (pEvent) Empty event, select next
beq .3
ldx #S.PS.S.DOEVENT
jsr CORE.PSExecX
dec IRQ.InKernel
bcs .3 not for this PS, try next event in list
jsr CORE.DestroyEvent this PS handled the EVT, destroy it...
lda CORE.EvtCount
beq .4 no more event, exit
.3 dec CORE.EvtIndex
beq .4 all EVT submitted to this PS, try other PS
lda pEvent try next EVT to this PS
clc
adc #S.EVT
sta pEvent
bra .2
.4 ldy #S.PS.S
lda #S.PS.S.RUN
sta (pPS),y
jsr CORE.PSLeave
.5 ldx CORE.PSIndex
inx
.80 cpx CORE.PSCount
bne .1
* sec
rts
*--------------------------------------
* X unmodified
*--------------------------------------
CORE.GetPSByID jsr CORE.GetPS
bcs .9
lda PS.TABLE.hPS,y
jmp K.GetMemPtr
.9 rts
*--------------------------------------
* X,A unmodified
*--------------------------------------
CORE.GetPS tay
beq .8 PS0 requested
ldy #0
bra .2 Skip PS0
.1 cmp PS.Table.PID,y
beq .8
.2 iny
cpy CORE.PSCount
bne .1
.9 lda #E.NSP
* sec
rts
.8 clc
rts
*--------------------------------------
CORE.DestroyEvent
lda (pEvent)
beq .9
bit #S.EVT.F.hMEM1
beq .1
pha
ldy #S.EVT.B1
lda (pEvent),y
jsr K.FreeMem
pla
.1 bit #S.EVT.F.hMEM2
beq .2
ldy #S.EVT.B2
lda (pEvent),y
jsr K.FreeMem
.2 lda #0
sta (pEvent)
dec CORE.EvtCount
.9 rts
*--------------------------------------
CORE.PSSelect ldy #S.PS.ZP.CODE+PSCTX.SIZE-1
ldx #PSCTX.SIZE-1
.1 lda (pPS),y
sta pCode,x
dey
dex
bpl .1
rts
*--------------------------------------
CORE.PSLeave ldx #PSCTX.SIZE-1
ldy #S.PS.ZP.CODE+PSCTX.SIZE-1
.1 lda pCode,x
sta (pPS),y
dey
dex
bpl .1
rts
*--------------------------------------
CORE.PSExec lda (pPS)
bit #S.PS.F.SLEEP
bne CORE.PSResume
ldy #S.PS.S
lda (pPS),y
tax
CORE.PSExecX lda pCode+1
pha
lda pCode
pha
php
sei
inc IRQ.InKernel
rti
*--------------------------------------
CORE.PSResume sei
eor #S.PS.F.SLEEP unmark as SLEEP
sta (pPS)
>PULLA Get !BC
tax
beq .2
.1 >PULLA
pha
inx
bne .1
.2 ldy #S.PS.PC+1
lda (pPS),y
pha
dey #S.PS.PC
lda (pPS),y
pha
dey #S.PS.P
lda (pPS),y
pha
dey #S.PS.Y
lda (pPS),y
pha
dey #S.PS.X
lda (pPS),y
tax
dey #S.PS.A
lda (pPS),y
ply
inc IRQ.InKernel
rti
*--------------------------------------
CORE.VBLState .BS 1
CORE.TickPerSec .BS 1
CORE.TickPer10t .BS 1
CORE.TickSec .BS 1
CORE.Tick10t .BS 1
CORE.CPUStatCnt .DA #100
CORE.LastPSID .DA #0
*--------------------------------------
CORE.EvtIndex .BS 1
CORE.EvtCount .BS 1
*--------------------------------------
* Called by IIgs formware, Native Mode, 8bits
*--------------------------------------
CORE.IRQGS .OP 65816
pha
phb
phx
phy
phk
plb
stz IO.IIGS.CLRVBLINT
jsr CORE.IRQ.Switch
ply
plx
plb
pla
* clc
rtl
* bra CORE.IRQ.Switch
.OP 65C02
*--------------------------------------
* Called by :
* - Kernel IRQ Manager (AuxLC)
* - ProDOS IRQ Manager (GP)
*--------------------------------------
CORE.IRQTK ldy IRQ.n0
lda $c080,y
and #$20
beq CORE.IRQ.DEV
lda $c088,y
lda $c080,y
bra CORE.IRQ.Switch
*--------------------------------------
CORE.IRQM jsr $FFFF SELF MODIFIED,SERVEMOUSE
bcs CORE.IRQ.DEV Not From Mouse
ldx IRQ.0n
lda MOUSESTSx,x
and #MOUSESTSx.INTVBL IRQ was caused by VBL ?
beq CORE.IRQ.DEV
ldx CORE.IRQM.2+2 $Cn
ldy IRQ.n0
CORE.IRQM.2 jsr $FFFF SELF MODIFIED,READMOUSE
*--------------------------------------
CORE.IRQ.Switch inc IRQ.Tick
dec CORE.CPUStatCnt
bne .2
lda #100
sta CORE.CPUStatCnt
ldx #K.PS.MAX-1
.1 lda PS.Table.Hits,x
stz PS.Table.Hits,x
sta PS.Table.Stats,x
dex
bpl .1
.2 lda IRQ.InKernel
bpl .3
inc PS.Table.Hits
.9 clv
clc
rts
.3 ldx CORE.PSIndex
inc PS.Table.Hits,x
bit A2osX.F A2osX.F.PMODE .EQ %01000000
bvc .8
ldy #S.PS.S
lda (pPS),y
eor #S.PS.S.RUN
bne .9
lda IRQ.InLib
bmi .9 we are in LIB, no switching
.8 clc exit with V flag set
rts
*--------------------------------------
CORE.IRQ.DEV ldx #0
.1 lda IRQ.Vectors+1,x
beq .9
sta .10+2
lda IRQ.Vectors,x
sta .10+1
phx
.10 jsr $ffff SELF MODIFIED
plx
bcc .8 CC, IRQ cleared by device
.2 inx
inx
.3 cpx #K.IRQDEV.MAX*2
bne .1
.9 sec
.8 clv clear V (no task switching)
rts
*--------------------------------------
CORE.IRQGSOff .OP 65816
clc
xce go to native mode
rep #$30 long M,X
pea $0003 Disable vertical blanking interrupts
>TKCALL IntSource
bcs *
pea $000C Vertical blanking interrupt handler
lda IRQ.GSVect+2
pha
lda IRQ.GSVect
pha
>TKCALL SetVector
bcs *
sep #$30 short M,X
sec
xce back to emulation mode
.OP 65C02
rts
*--------------------------------------
CORE.IRQTKOff ldx IRQ.n0
stz $c080,x
lda $c088,x
lda $c080,x
ldx IRQ.0n
stz $478,x
stz $7f8,x
*--------------------------------------
CORE.IRQOff rts
*--------------------------------------
CORE.IRQMOff ldy CORE.IRQMOff.1+2 Cn
ldy IRQ.n0
lda #0
CORE.IRQMOff.1 jmp $ffff SELF MODIFIED
*--------------------------------------
IRQ.InKernel .BS 1
IRQ.InLib .BS 1
IRQ.Skip .BS 1
IRQ.GSVect .BS 4
IRQ.IntNum .BS 1
IRQ.n0 .BS 1
IRQ.0n .BS 1
IRQ.Mode .BS 1
IRQ.Tick .BS 1
*--------------------------------------
IRQ.Vectors .BS K.IRQDEV.MAX*2
*--------------------------------------
MAN
SAVE usr/src/sys/kernel.s.core
LOAD usr/src/sys/kernel.s
ASM
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