NEW AUTO 3,1 */-------------------------------------- * # GetDevByName * Y,A = Ptr to device name (C-String) * ## RETURN VALUE * CC = OK, CS = ERROR * Y,A = FD * X = hDev *\-------------------------------------- K.GetDevByName >STYA ZPPtr1 requested dev name ldx #1 .1 lda Dev.Table,x beq .4 sta pFD+1 pha lda Dev.Table-1,x sta pFD clc adc #S.FD.DEV tay pla adc /S.FD.DEV jsr .8 bcs .3 jsr DEV.GetPDrv >LDYA pFD X = hDevNod * clc rts .3 inx no....loop inx cpx #K.DEV.MAX*2+1 bne .1 .4 ldx #2 .5 lda Nod.Table.hFD-2,x beq .7 lda Nod.Table.hName-2,x beq .7 jsr K.GetMemPtr jsr .8 bcs .7 lda Nod.Table.hFD-2,x jsr K.GetMemPtr Y,A = pPD, X = hDevNod >STYA pFD for UNISTD.Open * clc rts .7 inx inx cpx #K.NOD.MAX*2+2 bne .5 .9 lda #MLI.E.NODEV sec rts *-------------------------------------- .8 >STYA ZPPtr2 ldy #$ff .80 iny lda (ZPPtr1),y cmp (ZPPtr2),y bne .89 eor #0 bne .80 clc rts .89 sec K.GetDev.9 rts */-------------------------------------- * # GetDevStatus * ## C * `int getdevstatus(short int DevID, S.DIB *dstat);` * ## ASM * `>PUSHB DevID` * `>PUSHW S.DIB` * `>SYSCALL GetDevStatus` * ## RETURN VALUE *\-------------------------------------- K.GetDevStatus >PULLW K.S.IOCTL+S.IOCTL.BUFPTR >PULLA jsr DEV.GetPFD bcs K.GetDev.9 lda #S.IOCTL.STATCODE.GETDIB *-------------------------------------- DEV.GetDevStatus sta K.S.IOCTL+S.IOCTL.STATCODE ldy #S.FD.DEV.DEVID lda (pFD),y sta K.S.IOCTL+S.IOCTL.UNITNUM >LDYAI K.S.IOCTL ldx #IOCTL.STATUS *-------------------------------------- DEV.pDrvJmp jmp (pDrv) */-------------------------------------- * # MKDev * Create a hDEV * ## C * `hDEV mkdev (S.FD *fd, const char *devname)` * ## ASM * `>PUSHW fd` * `>PUSHW devname` * `>SYSCALL mkdev` * ## RETURN VALUE * A = hDEV *\-------------------------------------- K.MKDev >PULLW ZPPtr2 ptr2=name >PULLW ZPPtr1 ptr1=fd ldx #1 .10 lda Dev.Table,x beq .11 inx inx cpx #K.DEV.MAX*2+1 bne .10 bra .9 .11 stx IO.hDevNod ldy #$ff ldx #S.FD.DEV .1 iny Get DEV name length inx compute FD+NAME+\0 in X lda (ZPPtr2),y bne .1 txa tay lda #0 jsr MEM.GetKrnlBuf bcs .99 >STYA pFD >STYA .4+1 ldx IO.hDevNod sta Dev.Table,x tya sta Dev.Table-1,x ldy #S.FD.DEV-1 .2 lda (ZPPtr1),y sta (pFD),y dey bpl .2 ldy #$ff ldx #S.FD.DEV-1 .3 iny inx lda (ZPPtr2),y .4 sta $ffff,x bne .3 >LDYAI K.IOBuf >STYA K.S.IOCTL+S.IOCTL.BUFPTR jsr DEV.GetPDrv lda #S.IOCTL.STATCODE.STATUS jsr DEV.GetDevStatus bcs .99 lda K.IOBuf Get Status byte bit #S.DIB.S.IRQ beq .8 ldx #0 .5 lda IRQ.Vectors+1,x beq .7 inx inx cpx #K.IRQDEV.MAX*2+1 bne .5 .9 lda #E.OOH * sec .99 rts .7 ldy #IOCTL.IRQ+4 lda (pDRV),y sta IRQ.Vectors,x iny lda (pDRV),y sta IRQ.Vectors+1,x .8 lda IO.hDevNod * clc rts */-------------------------------------- * # IOCTL * ## C * `int ioctl(short int DevID, short int request, void *param);` * ## ASM * `>PUSHB hDEV` * `>PUSHB request` * `>PUSHW param` * `>SYSCALL IOCTL` * ## RETURN VALUE * Y,A = ... *\-------------------------------------- K.IOCTL ldy #3 hDev lda (pStack),y jsr DEV.GetPFD bcs .9 ldy #2 request lda (pStack),y tax >PULLYA param inc pStack inc pStack jmp (pDrv) .9 >RET 4 *-------------------------------------- DEV.GetPFD sta IO.hDevNod tax lsr bcs .1 lda Nod.Table.hFD-2,x empty slot ? beq DEV.GetPFD.9 sta IO.hFD jsr K.GetMemPtr >STYA pFD * clc rts .1 stz IO.hFD ldy Dev.Table-1,x lda Dev.Table,x beq DEV.GetPFD.9 >STYA pFD DEV.GetPDrv ldy #S.FD.DEV.DRVPTR lda (pFD),y sta pDRV iny lda (pFD),y sta pDRV+1 clc rts DEV.GetPFD.9 lda #E.INVH sec rts *-------------------------------------- * X = 0 > REG * X = 1 > DIR * X = 2 > PIPE *-------------------------------------- DEV.MkFD stx .8+1 ldy DEV.MkFD.Y,x lda #0 ldx #S.MEM.F.INIT0+S.MEM.F.FD jsr MEM.GetMem.YAX bcs .9 >STYA pFD stx IO.hFD .8 ldx #$ff SELF MODIFIED lda DEV.MkFD.T,x sta (pFD) X = hFD, A = T * clc .9 rts DEV.MkFD.Y .DA #S.FD.REG,#S.FD.DIR,#S.FD.PIPE DEV.MkFD.T .DA #S.FD.T.REG,#S.FD.T.DIR,#S.FD.T.PIPE *-------------------------------------- DEV.Destroy ldx IO.hDevNod lda Nod.Table.hName-2,x beq .1 stz Nod.Table.hName-2,x jsr K.FreeMem ldx IO.hDevNod .1 lda Nod.Table.hFD-2,x stz Nod.Table.hFD-2,x jmp K.FreeMem *-------------------------------------- MAN SAVE usr/src/sys/kernel.s.dev LOAD usr/src/sys/kernel.s ASM