A2osX/SYS/KERNEL.S.DEV.txt

319 lines
5.1 KiB
Plaintext
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

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