A2osX/SYS/KERNEL.S.MEM.txt

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NEW
PREFIX /A2OSX.BUILD
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AUTO 4,1
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*--------------------------------------
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ZPMemMgrSPtr .EQ ZPMEMMGR Pointer To Slot selected
ZPMemMgrTmp1 .EQ ZPMEMMGR+2
ZPMemMgrSize .EQ ZPMEMMGR+4
ZPSListID .EQ ZPMEMMGR+6
ZPSListIBlkPtr .EQ ZPMEMMGR+8
ZPSListDBlkPtr .EQ ZPMEMMGR+10
ZPSListKeyPtr .EQ ZPMEMMGR+12
ZPSListDataPtr .EQ ZPMEMMGR+14
*/--------------------------------------
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* # GetMem0
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* **In:**
* Y,A = Size Requested
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* **Out:**
* CC : success
* YA = PTR to Mem (ZERO Initialised)
* X = hMem
* CS :
* A = EC
*\--------------------------------------
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K.GetMem0 ldx #S.MEM.F.INIT0
.HS 2C bit abs
*/--------------------------------------
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* # GetMem
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* **In:**
* Y,A = Size Requested
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* **Out:**
* CC : success
* YA = PTR to Mem (Uninitialised)
* X = hMem
* CS :
* A = EC
*\--------------------------------------
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K.GetMem ldx #0
MEM.GetMem.YAX stx Mem.ReqFlags
sta ZPMemMgrSize+1
tya
bit #$0F 16 bytes aligned ?
beq .10 yes, request it
and #$F0 align on 16 bytes
clc
adc #$10
bcc .10
inc ZPMemMgrSize+1
.10 sta ZPMemMgrSize
>LDYAI Mem.Table
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>STYA ZPMemMgrSPtr
ldx #0 Current slot=0
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bra .4 skip slot 0, Check if some free slot to reuse first
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.1 inx move to next slot
jsr Mem.NextSlot
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lda (ZPMemMgrSPtr) Get Flags
bmi .4 in use ?
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.2 lda Mem.ReqFlags Found an empty slot
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and #S.MEM.F.ALIGN is request needs a page align ?
beq .3
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ldy #S.MEM.PTR
lda (ZPMemMgrSPtr),y get LO of PTR
bne .4 not page-aligned
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.3 ldy #S.MEM.LEN
lda (ZPMemMgrSPtr),y get LEN of this block
cmp ZPMemMgrSize compare with requested size
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bne .4
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iny
lda (ZPMemMgrSPtr),y
cmp ZPMemMgrSize+1
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beq .7 requested size matches slot size !!!
.4 cpx Mem.LastSlot any other slot to check?
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bne .1 last one, create a new slot
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*-------------- Create a New SLOT
lda Mem.ReqFlags
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and #S.MEM.F.ALIGN is request needs a page align ?
beq .6
lda Mem.Free target PTR will be page aligned ?
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sec
sbc ZPMemMgrSize
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beq .6 yes, allocate
tay no, reserve a free slot to fill gap
lda #0
jsr Mem.AddSlot X = new slot
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bcs .9
.6 >LDYA ZPMemMgrSize
jsr Mem.AddSlot X = new slot
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bcs .9
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*-------------- Reuse this SLOT
.7 lda Mem.ReqFlags get requested flags
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ora #S.MEM.F.INUSE mark as in use
sta (ZPMemMgrSPtr)
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and #S.MEM.F.INIT0
beq .8
ldy #S.MEM.PTR
lda (ZPMemMgrSPtr),y ZPMemMgrSPtr already set
sta .12+1
iny
lda (ZPMemMgrSPtr),y
sta .12+2
lda ZPMemMgrSize
eor #$ff
tay y=not lo count
lda ZPMemMgrSize+1
eor #$ff a=not hi count
phx
ldx #0
.11 iny
bne .12
inc
beq .13
.12 stz $ffff,x
inx
bne .11
inc .12+2
bra .11
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.13 plx
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.8 lda #0
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ldy #S.MEM.BIN
sta (ZPMemMgrSPtr),y
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inc Mark this slot used by one process
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ldy #S.MEM.REFCNT
sta (ZPMemMgrSPtr),y
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ldy #S.PS.PID
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lda (pPs),y
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ldy #S.MEM.OWNERPID
sta (ZPMemMgrSPtr),y
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ldy #S.MEM.PTR
lda (ZPMemMgrSPtr),y
pha
iny
lda (ZPMemMgrSPtr),y A = HI PTR
ply Y = LO PTR
clc X = Current hMem
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.9 rts
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*--------------------------------------
Mem.ReqFlags .BS 1 store requested Flags
*--------------------------------------
* Mem.AddSlot
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* In:
* Y,A = Requested size
* Out:
*--------------------------------------
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Mem.AddSlot >STYA ZPMemMgrTmp1 save req size
ldx Mem.LastSlot
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inx
beq .99 > 255 ERR:OUT OF SLOT
lda Mem.Free Compute base PTR=FREE-REQ size
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sec
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sbc ZPMemMgrTmp1
tay save new Mem.Free LO
lda Mem.Free+1
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sbc ZPMemMgrTmp1+1
pha save new Mem.Free HI
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cpy Mem.LoMem
sbc Mem.LoMem+1
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bcc .98 ERR out of mem
jsr Mem.NextSlot X,Y unmodified
tya get back Mem.Free LO
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ldy #S.MEM.PTR
sta Mem.Free set as system Mem.Free value
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sta (ZPMemMgrSPtr),y store is as base address of new slot
iny
pla get back Mem.Free HI
sta Mem.Free+1
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sta (ZPMemMgrSPtr),y
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iny
lda ZPMemMgrTmp1 get requested size
sta (ZPMemMgrSPtr),y setup slot LEN
iny
lda ZPMemMgrTmp1+1
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sta (ZPMemMgrSPtr),y
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stx Mem.LastSlot mark this slot allocated
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clc
rts
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.98 pla discard new Mem.Free HI
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.99 lda #K.E.OOM
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sec
rts
*--------------------------------------
Mem.NextSlot lda ZPMemMgrSPtr
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clc
adc #S.MEM
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sta ZPMemMgrSPtr
bcc .8
inc ZPMemMgrSPtr+1
.8 rts
*/--------------------------------------
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* # FreeMem
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* **In:**
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* A = hMem To Free
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* **Out:**
* none.
* (X,Y unmodified)
*\--------------------------------------
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K.FreeMem phy
tay
beq * Slot=0, reserved by Kernel
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jsr K.GetMemByID X unmodified
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lda (ZPMemMgrSPtr)
bpl .9 In use ?
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ldy #S.MEM.REFCNT
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lda (ZPMemMgrSPtr),y Get count of those referencing this hMem
dec only one left ?
sta (ZPMemMgrSPtr),y
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bne .8 no, must be a code segment loaded several times
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lda #0 mark this slot as free
sta (ZPMemMgrSPtr)
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ldy #S.MEM.BIN
lda (ZPMemMgrSPtr),y Any BINPATH to discard ?
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beq .1
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jsr K.GetMemByID X unmodified
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lda (ZPMemMgrSPtr)
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bpl * ***MUST BE ALLOCATED***
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lda #0 mark BINPATH slot as free
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sta (ZPMemMgrSPtr)
.1 lda Mem.LastSlot
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beq .8
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jsr K.GetMemByID X unmodified
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lda (ZPMemMgrSPtr)
bmi .8 used, exit
.2 dec Mem.LastSlot free! get previous....
beq .3 empty list: go set Mem.Free=Mem.HiMem
lda Mem.LastSlot
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jsr K.GetMemByID X unmodified
lda (ZPMemMgrSPtr)
bpl .2 free again! loop
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ldy #S.MEM.PTR
lda (ZPMemMgrSPtr),y set Mem.Free...
sta Mem.Free
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iny
lda (ZPMemMgrSPtr),y
sta Mem.Free+1
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.8 ply
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clc
rts
.3 >LDYA Mem.HiMem
>STYA Mem.Free
bra .8
*--------------------------------------
.9 ply discard saved Y
lda $D000
sta .91+1
bit RRAMWRAMBNK2
bit RRAMWRAMBNK2
jsr CORE.PSSelect0 Select PS0 for proper I/O devices
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jsr DRV.SYS.Control
pla Get PC and sub 2 for calling address
sec
sbc #2
tay
pla
sbc #0
>PUSHYA
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>LDYAI K.FreeMem.ERR
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>SYSCALL printf
.91 ldx #$ff
bit $C000,x
bit $C000,x
bra *
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*--------------------------------------
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K.FreeMem.ERR .AZ "FreeMem:%H:hMem already freed."
*/--------------------------------------
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* # GetMemPtr
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* **In:**
* A = hMem
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* **Out:**
* Y,A = PTR to MemBlock
* (X unmodified)
*\--------------------------------------
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K.GetMemPtr jsr K.GetMemByID
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ldy #S.MEM.PTR
lda (ZPMemMgrSPtr),y
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pha
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iny
lda (ZPMemMgrSPtr),y
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ply
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rts
*/--------------------------------------
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* # GetMemByID
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* **In:**
* A = hMem
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* **Out:**
* Y,A = ZPMemMgrSPtr = PTR to S.MEM
* X unmodified
*\--------------------------------------
* Optimized for :
* Mem.Table is page aligned at $1800
* S.MEM is 8 bytes
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*--------------------------------------
.DO Mem.Table=$1800
.ELSE
!!!!!WARNING!!!!!
.FIN
.DO S.MEM=8
.ELSE
!!!!!WARNING!!!!!
.FIN
*--------------------------------------
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K.GetMemByID sta ZPMemMgrSPtr
lda /Mem.Table/8
asl ZPMemMgrSPtr
rol
asl ZPMemMgrSPtr
rol
asl ZPMemMgrSPtr
rol
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sta ZPMemMgrSPtr+1
ldy ZPMemMgrSPtr
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rts
*--------------------------------------
* OLD CODE
*--------------------------------------
* stz ZPMemMgrSPtr+1
* asl
* rol ZPMemMgrSPtr+1
* asl
* rol ZPMemMgrSPtr+1
* asl
* rol ZPMemMgrSPtr+1
** clc IMPLICIT
* adc #Mem.Table
* tay
* lda ZPMemMgrSPtr+1
* adc /Mem.Table
* sty ZPMemMgrSPtr
* sta ZPMemMgrSPtr+1
* rts
*/--------------------------------------
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* # NewStr
* Create a new copy of this C-String
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* **In:**
* Y,A = Ptr to source C-String
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* **Out:**
* CC : success
* Y,A = PTR to String
* X = hMem (PSTR)
* CS : error
* A = SYS error code
*\--------------------------------------
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K.NewStr >STYA .1+1
>STYA .4+1
ldy #0
lda #0
.1 ldx $ffff,y
beq .2
iny
bne .1
inc
inc .1+2
bne .1
.2 iny Add one for ending 0
bne .3
inc
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.3 jsr K.GetMem
bcs .9
>STYA .5+1
phy
pha
ldy #0
.4 lda $ffff,y
.5 sta $ffff,y
beq .8
iny
bne .4
inc .4+2
inc .5+2
bne .4
.8 pla
ply
clc
.9 rts
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*/--------------------------------------
* # SListGetByID
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* **In:**
* PUSHB = hSList
* PUSHW = KeyID
* PUSHW = Data Ptr
* PUSHW = Key Ptr
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* **Out:**
* X,Y = Next KeyID
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*\--------------------------------------
K.SListGetByID >PULLW ZPSListKeyPtr
*/--------------------------------------
* # SListUpdateByID
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* **In:**
* PUSHB = hSList
* PUSHW = KeyID
* PUSHW = Data Ptr
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* **Out:**
* A = Key Length
* X,Y = KeyID
*\--------------------------------------
K.SListUpdateByID
>PULLW ZPSListDataPtr
>PULLW ZPSListID
bra K.SListPullH
*/--------------------------------------
* # SListAdd
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* **In:**
* PUSHB = hSList
* PUSHW = Key Ptr
* PUSHW = Data Ptr
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* **Out:**
* A = Key Length
* X,Y = KeyID
*\--------------------------------------
K.SListAdd
*/--------------------------------------
* # SListLookup
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* **In:**
* PUSHB = hSList
* PUSHW = Key Ptr
* PUSHW = Data Ptr
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* **Out:**
* A = Key Length
* X,Y = KeyID
*\--------------------------------------
K.SListLookup
*--------------------------------------
>PULLW ZPSListDataPtr
>PULLW ZPSListKeyPtr
K.SListPullH >PULLA
*/--------------------------------------
* # SListNew
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* **In:**
* **Out:**
* A=hSList
*\--------------------------------------
K.SListNew
*/--------------------------------------
* # SListFree
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* **In:**
* A=hSList
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* **Out:**
*\--------------------------------------
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K.SListFree
*--------------------------------------
sta SETREADAUX
sta SETWRITEAUX
jsr X.SLIST
sta CLRREADAUX
sta CLRWRITEAUX
rts
*/--------------------------------------
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* # GetStkObjProp
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* **In:**
* A = hObject (AUX Memory)
* Y = Property Index
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* **Out:**
* Y,A = Property Value
*\--------------------------------------
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K.GetStkObjProp phy
sta SETREADAUX
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jsr K.GetMemPtr
>STYA ZPMemMgrTmp1
ply
lda (ZPMemMgrTmp1),y
pha
iny
lda (ZPMemMgrTmp1),y
ply
sta CLRREADAUX
rts
*/--------------------------------------
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* # NewStkObj
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* **In:**
* Y,A = Size Requested
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* **Out:**
* CC : success
* YA = PTR to Mem (Uninitialised)
* X = hMem
* CS :
* A = EC
*\--------------------------------------
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K.NewStkObj ldx #SYS.GetMem
.HS 2C BIT ABS
*/--------------------------------------
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* # FreeStkObj
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* **In:**
* A = hMem To Free (AUX Memory)
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* **Out:**
* none.
* (X,Y unmodified)
*\--------------------------------------
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K.FreeStkObj ldx #SYS.FreeMem
MEM.GoStkObj sta SETREADAUX
sta SETWRITEAUX
jsr .1
sta CLRREADAUX
sta CLRWRITEAUX
rts
.1 jmp (SYS.Kernel.JMP,x)
*/--------------------------------------
* # LoadStkObj
* Load a file in AUX memory (Stock Objects)
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* **In:**
* PUSHW = AUXTYPE (Handled by....
* PUSHB = TYPE ...
* PUSHB = MODE ...
* PUSHW = PATH ...FOpen)
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* **Out:**
* Y,A = File Length
* X = hMem of Loaded Object in AUX mem
*\--------------------------------------
K.LoadStkObj >SYSCALL LoadFile
bcs .99
stx .8+1 Save MAIN hMem
>STYA A2L Save LEN temporarly
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jsr K.NewStkObj
bcs .9
stx .80+1
>STYA A4L Save Destination Address in AUX
lda .8+1
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jsr K.GetMemPtr
>STYA A1L Save MAIN base Ptr
pha Add Allocated LEN
tya
clc
adc A2L
sta A2L
pla
adc A2L+1
sta A2L+1 to get End address in A2L/H
sec Main To Aux
jsr AuxMove
.8 lda #$ff SELF MODIFIED
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jsr K.FreeMem release MAIN memory
.80 lda #$ff Returns AUX hMem
rts
.9 pha
jsr .8
pla
sec
.99 rts
*--------------------------------------
MEM.GetKeyCharY sta CLRREADAUX
lda (ZPSListKeyPtr),y
sta SETREADAUX
beq MEM.IsDigit.9
MEM.IsIDValid cmp #'.'
beq MEM.IsDigit.8
cmp #'_'
beq MEM.IsDigit.8
MEM.IsDigitOrL cmp #'z'+1
bcs MEM.IsDigit.RTS
cmp #'a'
bcs MEM.IsDigit.8
MEM.IsDigitOrUC cmp #'Z'+1
bcs MEM.IsDigit.RTS
cmp #'A'
bcs MEM.IsDigit.8
MEM.IsDigit cmp #'9'+1
bcs MEM.IsDigit.RTS
cmp #'0'
bcs MEM.IsDigit.8
MEM.IsDigit.9 sec
MEM.IsDigit.RTS rts
MEM.IsDigit.8 clc
rts
*--------------------------------------
MEM.IsHexDigit jsr MEM.IsDigit
bcc .8
cmp #'A'
bcc MEM.IsDigit.9
cmp #'F'+1
bcc .1
cmp #'a'
bcc MEM.IsDigit.9
cmp #'f'+1
bcs MEM.IsDigit.RTS
eor #$20
.1
* clc
sbc #'A'-11 cc so A->10 (11-CC)
clc
.8 and #$0F
rts
*--------------------------------------
MEM.SetKeyCharY sta CLRWRITEAUX
sta (ZPSListKeyPtr),y
sta SETWRITEAUX
rts
*--------------------------------------
MEM.GetDataByte sta CLRREADAUX
lda (ZPSListDataPtr)
sta SETREADAUX
bra MEM.SetDataByte.1
*--------------------------------------
MEM.SetDataByte sta CLRWRITEAUX
sta (ZPSListDataPtr)
sta SETWRITEAUX
MEM.SetDataByte.1
inc ZPSListDataPtr
bne .8
inc ZPSListDataPtr+1
.8 rts
*--------------------------------------
MEM.TXTPTR.GetNext
sta CLRREADAUX
lda (TXTPTR)
sta SETREADAUX
beq .9
inc TXTPTR
bne .9
inc TXTPTR+1
.9 rts
*--------------------------------------
MEM.PullP1P2P3 sec
.HS 90 bcc
MEM.PullP1P2 clc
>PULLW ZPPtr1
>PULLW ZPPtr2
bcc .9
>PULLW ZPPtr3
.9 rts
*--------------------------------------
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MAN
SAVE /A2OSX.SRC/SYS/KERNEL.S.MEM
LOAD /A2OSX.SRC/SYS/KERNEL.S
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ASM