mirror of
https://github.com/A2osX/A2osX.git
synced 2024-11-25 05:32:20 +00:00
319 lines
5.1 KiB
Plaintext
319 lines
5.1 KiB
Plaintext
NEW
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AUTO 3,1
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*/--------------------------------------
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* # GetDevByName
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* Y,A = Ptr to device name (C-String)
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* ## RETURN VALUE
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* CC = OK, CS = ERROR
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* Y,A = FD
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* X = hFD
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*\--------------------------------------
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K.GetDevByName >STYA ZPPtr1 requested dev name
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ldx #1
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.1 lda hFDs-1,x
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beq .7
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sta IO.hFD
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jsr K.GetMemPtr
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>STYA pFD
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lda hFDs.hName-1,x
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bne .2
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jsr DEV.GetPDrv
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lda pFD
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clc
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adc #S.FD.DEV
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sta ZPPtr2
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lda pFD+1
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adc /S.FD.DEV
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sta ZPPtr2+1
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bra .3
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.2 jsr K.GetMemPtr
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>STYA ZPPtr2
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lda (ZPPtr2)
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cmp #'/' REG/DIR
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beq .7
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.3 ldy #$ff
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.4 iny
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lda (ZPPtr1),y
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cmp (ZPPtr2),y
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bne .7
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eor #0
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bne .4
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stx IO.hFILE
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>LDYA pFD
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ldx IO.hFD
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clc
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rts
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.7 inx no....loop
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cpx #K.hFD.MAX+1
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bne .1
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lda #MLI.E.NODEV
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* sec
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K.GetDev.9 rts
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*/--------------------------------------
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* # MkFD
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* ## C
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* `short int mkfd(short int type, );`
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* ## ASM
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* `>PUSHB DevID`
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* `>PUSHW S.DIB`
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* `>SYSCALL GetDevStatus`
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* ## RETURN VALUE
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*\--------------------------------------
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K.MkFD
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clc
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rts
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*/--------------------------------------
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* # MKDev
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* Create a hDEV
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* ## C
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* `hDEV mkdev (S.FD *fd, const char *devname)`
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* ## ASM
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* `>PUSHW fd`
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* `>PUSHW devname`
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* `>SYSCALL mkdev`
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* ## RETURN VALUE
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* A = hDEV
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*\--------------------------------------
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K.MKDev jsr SHARED.PullP2P1 ptr2=name,tr1=fd
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ldy #$ff
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ldx #S.FD.DEV
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.1 iny Get DEV name length
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inx compute FD+NAME+\0 in X
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lda (ZPPtr2),y
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bne .1
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txa
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tay
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lda #S.FD.T.CDEV
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jsr DEV.MkFDy
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bcs .9
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>STYA .4+1
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ldy #S.FD.DEV-1
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.2 lda (ZPPtr1),y
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sta (pFD),y
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dey
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bpl .2
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ldy #$ff
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ldx #S.FD.DEV-1
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.3 iny
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inx
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lda (ZPPtr2),y
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.4 sta $ffff,x
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bne .3
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>LDYAI K.IOBuf
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>STYA K.S.IOCTL+S.IOCTL.BUFPTR
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jsr DEV.GetPDrv
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lda #S.IOCTL.S.STATUS
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jsr DEV.GetStatus
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bcs .9
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lda K.IOBuf Get Status byte
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bit #S.DIB.S.IRQ
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beq .8
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ldx #0
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.5 lda IRQ.Vectors+1,x
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beq .7
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inx
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inx
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cpx #K.IRQDEV.MAX*2+1
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bne .5
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* sec
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.9 rts
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.7 ldy #IOCTL.IRQ+4
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lda (pDRV),y
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sta IRQ.Vectors,x
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iny
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lda (pDRV),y
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sta IRQ.Vectors+1,x
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.8 lda IO.hFD
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* clc
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rts
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*/--------------------------------------
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* # IOCTL
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* ## C
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* `int ioctl(short int hFD, short int request, void *param);`
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* ## ASM
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* `>PUSHB hDEV`
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* `>PUSHB request`
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* `>PUSHW param`
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* `>SYSCALL IOCTL`
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* ## RETURN VALUE
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* Y,A = ...
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*\--------------------------------------
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K.IOCTL ldy #3 hFD
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lda (pStack),y
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jsr DEV.GetPFD
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ldy #2 request
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lda (pStack),y
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tax
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>PULLYA param
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inc pStack
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inc pStack
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jmp (pDrv)
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*--------------------------------------
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DEV.OPEN ldx #IOCTL.OPEN
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lda IO.hFD
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jsr DEV.pDrvJmp
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bcs .9
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lda IO.hFD
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.9 rts
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*--------------------------------------
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DEV.CLOSE ldx #IOCTL.CLOSE
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lda IO.hFD
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jmp (pDrv)
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*--------------------------------------
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DEV.READ ldx #IOCTL.READ
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.HS 2C BIT ABS
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*--------------------------------------
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DEV.WRITE ldx #IOCTL.WRITE
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>PULLW K.S.IOCTL+S.IOCTL.BYTECNT
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>PULLW K.S.IOCTL+S.IOCTL.BUFPTR
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inc pStack pop hFD
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>LDYAI K.S.IOCTL
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jsr DEV.pDrvJmp
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bcs .9
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>LDYA K.S.IOCTL+S.IOCTL.BYTECNT
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.9 rts
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*--------------------------------------
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DEV.EOF lda #S.IOCTL.S.EOF
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*--------------------------------------
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DEV.GetStatus sta K.S.IOCTL+S.IOCTL.S
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ldy #S.FD.DEV.DEVID
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lda (pFD),y
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sta K.S.IOCTL+S.IOCTL.UNITNUM
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ldx #IOCTL.STATUS
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>LDYAI K.S.IOCTL
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*--------------------------------------
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DEV.pDrvJmp jmp (pDrv)
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*--------------------------------------
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DEV.GetPFD sta IO.hFD
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jsr K.GetMemPtr
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>STYA pFD
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DEV.GetPDrv ldy #S.FD.DEV.DRVPTR
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lda (pFD),y
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sta pDRV
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iny
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lda (pFD),y
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sta pDRV+1
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rts
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*--------------------------------------
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DEV.MkFD ldy #16 Y = Size, MAX=16 for S.FD.DIR
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DEV.MkFDy sta .8+1 A = S.FD.T
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jsr DEV.GetFreeFD
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bcs .9
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.2 stx IO.hFILE
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lda #0
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ldx #S.MEM.F.INIT0+S.MEM.F.FD
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jsr MEM.GetMem.YAX
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bcs .9
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>STYA pFD
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stx IO.hFD
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jsr Mem.SetOwnerPS0
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txa
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.7 ldx IO.hFILE
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sta hFDs-1,x
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stz hFDs.hName-1,x
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.8 lda #$ff SELF MODIFIED
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sta (pFD)
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>LDYA pFD Y,A = pFD, X = hFILE
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* clc
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.9 rts
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*--------------------------------------
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DEV.GetFreeFD lda #0
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DEV.GetFD ldx #1
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.1 cmp hFDs-1,x
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beq DEV.GetFD.8
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inx
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cpx #K.hFD.MAX+1
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bne .1
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tax
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beq DEV.GetFD.8
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lda #E.INVH
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.HS 2C BIT ABS
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.9 lda #E.OOH
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* sec
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rts
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DEV.GetFD.8 clc
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rts
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*--------------------------------------
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DEV.hFDFree lda IO.hFD
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beq DEV.GetFD.8
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jmp K.FreeMem
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*--------------------------------------
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MAN
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SAVE usr/src/sys/kernel.s.dev
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LOAD usr/src/sys/kernel.s
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ASM
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