mirror of
https://github.com/A2osX/A2osX.git
synced 2024-11-04 03:05:43 +00:00
446 lines
9.5 KiB
Plaintext
446 lines
9.5 KiB
Plaintext
PR#3
|
||
PREFIX /A2OSX.SRC
|
||
NEW
|
||
INC 1
|
||
AUTO 6
|
||
.LIST OFF
|
||
*--------------------------------------
|
||
* !!!!!!!! DO NOT USE VCPU16 !!!!!!!!
|
||
* !!!!!! DO NOT USE ZPQuickPTRs !!!!!
|
||
*--------------------------------------
|
||
ZPMemMgrSPtr .EQ ZPMemMgr Pointer To Slot selected
|
||
ZPMemMgrTmp1 .EQ ZPMemMgr+2
|
||
ZPMemMgrTmp2 .EQ ZPMemMgr+4
|
||
ZPMemMgrTmp3 .EQ ZPMemMgr+6
|
||
*--------------------------------------
|
||
* TODO :
|
||
* - Create a 256 bytes table
|
||
* mapping hMem's to real memory blocks to help
|
||
* Garbage collector move blocks
|
||
* - mem.ID=0 always used! useful to test if hMem=0
|
||
*--------------------------------------
|
||
S.MemMgrInit >LDYAI MemMgr.MHiMem
|
||
>STYA MemMgr.HiMem
|
||
>STYA MemMgr.Free
|
||
|
||
>LDYAI MemMgr.MLoMem
|
||
>STYA MemMgr.LoMem
|
||
|
||
stz MemMgr.LastSlot Reserve Slot #0
|
||
|
||
sta SETREADAUX
|
||
sta SETWRITEAUX
|
||
|
||
>LDYAI MemMgr.XHiMem
|
||
>STYA MemMgr.HiMem
|
||
>STYA MemMgr.Free
|
||
|
||
>LDYAI MemMgr.XLoMem
|
||
>STYA MemMgr.LoMem
|
||
|
||
stz MemMgr.LastSlot Reserve Slot #0
|
||
|
||
sta CLRREADAUX
|
||
sta CLRWRITEAUX
|
||
|
||
clc
|
||
rts
|
||
*--------------------------------------
|
||
* PUBLIC
|
||
*--------------------------------------
|
||
* S.GetMem
|
||
* In:
|
||
* PULLB = FLAGS
|
||
* PULLW = Size Requested
|
||
* Out:
|
||
* YA = PTR to Mem
|
||
* X = S.MEM.ID
|
||
* CS on err
|
||
*--------------------------------------
|
||
S.GetMem >PULLB MemMgr.ReqFlags store requested flags
|
||
and #S.MEM.F.AUX
|
||
beq .11
|
||
|
||
sta SETREADAUX Aux Mem requested,switch to AUX
|
||
sta SETWRITEAUX
|
||
|
||
.11 >PULLW MemMgr.ReqSize Store requested size
|
||
lda MemMgr.ReqSize align REQS to 16 bytes
|
||
and #$0F
|
||
beq .10
|
||
|
||
lda MemMgr.ReqSize
|
||
and #$F0
|
||
clc
|
||
adc #$10
|
||
sta MemMgr.ReqSize
|
||
bcc .10
|
||
inc MemMgr.ReqSize+1
|
||
|
||
.10 >LDYAI MemMgr.Table
|
||
>STYA ZPMemMgrSPtr
|
||
|
||
ldx #0 Current slot=0
|
||
|
||
lda MemMgr.LastSlot Check if some free slot to reuse first
|
||
beq .41
|
||
|
||
sta MemMgr.SlotCnt
|
||
|
||
.1 inx move to next slot
|
||
jsr MemMgr.NextSlot
|
||
lda (ZPMemMgrSPtr) Get Flags
|
||
bmi .4 in use ?
|
||
|
||
.2 lda MemMgr.ReqFlags Found an empty slot
|
||
and #S.MEM.F.ALIGN is request needs a page align ?
|
||
beq .3
|
||
|
||
ldy #S.MEM.PTR
|
||
lda (ZPMemMgrSPtr),y get LO of PTR
|
||
bne .4 not page-aligned
|
||
|
||
.3 ldy #S.MEM.LEN
|
||
lda (ZPMemMgrSPtr),y get LEN of this block
|
||
cmp MemMgr.ReqSize compare with requested size
|
||
bne .4
|
||
|
||
iny
|
||
lda (ZPMemMgrSPtr),y
|
||
cmp MemMgr.ReqSize+1
|
||
beq .7 requested size matches slot size !!!
|
||
|
||
.4 dec MemMgr.SlotCnt any other slot to check?
|
||
bne .1 last one, create a new slot
|
||
*-------------- Create a New SLOT
|
||
.41 lda MemMgr.ReqFlags
|
||
and #S.MEM.F.ALIGN is request needs a page align ?
|
||
beq .6
|
||
|
||
lda MemMgr.Free target PTR will be page aligned ?
|
||
sec
|
||
sbc MemMgr.ReqSize
|
||
beq .6 yes, allocate
|
||
|
||
tay no, reserve a free slot to fill gap
|
||
lda #0
|
||
jsr MemMgr.AddSlot X = new slot
|
||
bcs .9
|
||
|
||
.6 >LDYA MemMgr.ReqSize
|
||
jsr MemMgr.AddSlot X = new slot
|
||
bcs .9
|
||
*-------------- Reuse this SLOT
|
||
.7 lda MemMgr.ReqFlags get requested flags
|
||
ora #S.MEM.F.INUSE mark as in use
|
||
sta (ZPMemMgrSPtr)
|
||
|
||
and #S.MEM.F.INIT0
|
||
beq .8
|
||
|
||
jsr MemMgr.Init0
|
||
|
||
.8 lda #0
|
||
ldy #S.MEM.BIN
|
||
sta (ZPMemMgrSPtr),y
|
||
|
||
inc Mark this slot used by one process
|
||
ldy #S.MEM.REFCNT
|
||
sta (ZPMemMgrSPtr),y
|
||
|
||
ldy #S.PS.ID
|
||
lda (pPs),y
|
||
ldy #S.MEM.OWNERPID
|
||
sta (ZPMemMgrSPtr),y
|
||
|
||
ldy #S.MEM.PTR
|
||
lda (ZPMemMgrSPtr),y
|
||
pha
|
||
iny
|
||
lda (ZPMemMgrSPtr),y A = HI PTR
|
||
ply Y = LO PTR
|
||
clc X = Current hMem
|
||
|
||
.9 bit MemMgr.ReqFlags
|
||
bpl .99
|
||
|
||
sta CLRREADAUX
|
||
sta CLRWRITEAUX
|
||
|
||
.99 rts
|
||
*--------------------------------------
|
||
* MemMgr.AddSlot
|
||
* In:
|
||
* Y,A = Requested size
|
||
* Out:
|
||
*--------------------------------------
|
||
MemMgr.AddSlot >STYA ZPMemMgrTmp1 save req size
|
||
ldx MemMgr.LastSlot
|
||
inx
|
||
beq .99 > 255 ERR:OUT OF SLOT
|
||
|
||
lda MemMgr.Free Compute base PTR=FREE-REQ size
|
||
sec
|
||
sbc ZPMemMgrTmp1
|
||
sta ZPMemMgrTmp2 store new MemMgr.Free in ZPMemMgrTmp2
|
||
lda MemMgr.Free+1
|
||
sbc ZPMemMgrTmp1+1
|
||
sta ZPMemMgrTmp2+1
|
||
|
||
lda ZPMemMgrTmp2 ensure new MemMgr.Free is not lower
|
||
sec than LoMem
|
||
sbc MemMgr.LoMem
|
||
lda ZPMemMgrTmp2+1
|
||
sbc MemMgr.LoMem+1
|
||
bcc .98 ERR out of mem
|
||
|
||
jsr MemMgr.NextSlot
|
||
|
||
ldy #S.MEM.PTR
|
||
lda ZPMemMgrTmp2 get new MemMgr.Free
|
||
sta MemMgr.Free set as system MemMgr.Free value
|
||
sta (ZPMemMgrSPtr),y store is as base address of new slot
|
||
iny
|
||
lda ZPMemMgrTmp2+1
|
||
sta MemMgr.Free+1
|
||
sta (ZPMemMgrSPtr),y
|
||
|
||
iny
|
||
lda ZPMemMgrTmp1 get requested size
|
||
sta (ZPMemMgrSPtr),y setup slot LEN
|
||
iny
|
||
lda ZPMemMgrTmp1+1
|
||
sta (ZPMemMgrSPtr),y
|
||
|
||
stx MemMgr.LastSlot mark this slot allocated
|
||
clc
|
||
rts
|
||
|
||
.98 lda #MemMgr.ERROOM
|
||
sec
|
||
rts
|
||
|
||
.99 lda #MemMgr.ERROOH
|
||
sec
|
||
rts
|
||
*--------------------------------------
|
||
MemMgr.NextSlot lda ZPMemMgrSPtr
|
||
clc
|
||
adc #S.MEM.SIZE
|
||
sta ZPMemMgrSPtr
|
||
bcc .8
|
||
inc ZPMemMgrSPtr+1
|
||
.8 rts
|
||
*--------------------------------------
|
||
MemMgr.Init0 ldy #S.MEM.PTR
|
||
lda (ZPMemMgrSPtr),y ZPMemMgrSPtr already set
|
||
sta ZPMemMgrTmp1 set ZPMemMgrTmp1 to Mem Ptr
|
||
iny
|
||
lda (ZPMemMgrSPtr),y
|
||
sta ZPMemMgrTmp1+1
|
||
|
||
ldy #S.MEM.LEN
|
||
lda (ZPMemMgrSPtr),y
|
||
sta ZPMemMgrTmp2 set ZPMemMgrTmp2 to mem size
|
||
iny
|
||
lda (ZPMemMgrSPtr),y
|
||
sta ZPMemMgrTmp2+1
|
||
|
||
lda #0
|
||
|
||
.1 ldy ZPMemMgrTmp2
|
||
bne .2
|
||
ldy ZPMemMgrTmp2+1
|
||
beq .3
|
||
dec ZPMemMgrTmp2+1
|
||
.2 dec ZPMemMgrTmp2
|
||
|
||
sta (ZPMemMgrTmp1)
|
||
inc ZPMemMgrTmp1
|
||
bne .1
|
||
inc ZPMemMgrTmp1+1
|
||
bra .1
|
||
|
||
.3 rts
|
||
*--------------------------------------
|
||
MemMgr.SlotCnt .BS 1
|
||
MemMgr.ReqFlags .BS 1 store requested Flags
|
||
MemMgr.ReqSize .BS 2 store requested Size
|
||
*--------------------------------------
|
||
* S.FreeMemA
|
||
* In:
|
||
* A = hMem To Free
|
||
* Out:
|
||
* X,Y unmodified
|
||
*--------------------------------------
|
||
S.FreeMemA phy
|
||
phx
|
||
tax
|
||
beq .8 Slot=0, reserved by Kernel
|
||
|
||
jsr S.GetMemByIDA
|
||
lda (ZPMemMgrSPtr)
|
||
bpl * In use ?
|
||
|
||
ldy #S.MEM.REFCNT
|
||
lda (ZPMemMgrSPtr),y Get count of those referencing this hMem
|
||
dec only one left ?
|
||
sta (ZPMemMgrSPtr),y
|
||
bne .8 no, must be a code segment loaded several times
|
||
|
||
ldy #S.MEM.BIN
|
||
lda (ZPMemMgrSPtr),y Any BINPATH to discard ?
|
||
beq .1
|
||
|
||
pha save hMem
|
||
>PUSHW ZPMemMgrSPtr
|
||
pla
|
||
jsr S.GetMemByIDA
|
||
lda (ZPMemMgrSPtr)
|
||
bpl * ***MUST BE ALLOCATED***
|
||
|
||
lda #0 mark BINPATH slot as free
|
||
sta (ZPMemMgrSPtr)
|
||
>PULLW ZPMemMgrSPtr
|
||
|
||
.1 lda #0 mark this slot as free
|
||
sta (ZPMemMgrSPtr)
|
||
|
||
.2 lda MemMgr.LastSlot
|
||
beq .8
|
||
|
||
jsr S.GetMemByIDA
|
||
lda (ZPMemMgrSPtr)
|
||
bmi .8
|
||
|
||
ldy #S.MEM.LEN
|
||
lda (ZPMemMgrSPtr),y give back LEN bytes
|
||
clc
|
||
adc MemMgr.Free to MemMgr.Free
|
||
sta MemMgr.Free
|
||
iny
|
||
lda (ZPMemMgrSPtr),y
|
||
adc MemMgr.Free+1
|
||
sta MemMgr.Free+1
|
||
|
||
dec MemMgr.LastSlot discard last slot
|
||
bne .2 no slot left, exit
|
||
|
||
.8 plx
|
||
ply
|
||
clc
|
||
rts
|
||
*--------------------------------------
|
||
* S.GetMemPtrA
|
||
* In:
|
||
* A = hMem
|
||
* Out:
|
||
* Y,A = PTR to MemBlock
|
||
* X unmodified
|
||
*--------------------------------------
|
||
S.GetMemPtrA jsr S.GetMemByIDA
|
||
ldy #S.MEM.PTR
|
||
lda (ZPMemMgrSPtr),y
|
||
pha
|
||
iny
|
||
lda (ZPMemMgrSPtr),y
|
||
ply
|
||
rts
|
||
*--------------------------------------
|
||
* S.GetMemByIDA
|
||
* In:
|
||
* A = hMem
|
||
* Out:
|
||
* Y,A = ZPMemMgrSPtr = PTR to S.MEM
|
||
* X unmodified
|
||
*--------------------------------------
|
||
S.GetMemByIDA stz ZPMemMgrSPtr+1
|
||
|
||
asl
|
||
rol ZPMemMgrSPtr+1
|
||
asl
|
||
rol ZPMemMgrSPtr+1
|
||
asl
|
||
rol ZPMemMgrSPtr+1
|
||
|
||
clc
|
||
adc #MemMgr.Table
|
||
sta ZPMemMgrSPtr
|
||
tay
|
||
lda ZPMemMgrSPtr+1
|
||
adc /MemMgr.Table
|
||
sta ZPMemMgrSPtr+1
|
||
rts
|
||
*--------------------------------------
|
||
* In:
|
||
* A = hMem to BINPATH (PSTR)
|
||
* Out:
|
||
* Y,A = ZPMemMgrSPtr = PTR to S.MEM
|
||
* X = hMem
|
||
*--------------------------------------
|
||
S.GetMemByNameA jsr S.GetMemPtrA
|
||
bcs *
|
||
S.GetMemByNameYA
|
||
>STYA ZPMemMgrTmp1 save BINPATH
|
||
>LDYAI MemMgr.Table
|
||
>STYA ZPMemMgrTmp2
|
||
ldx #0
|
||
|
||
.1 cpx MemMgr.LastSlot
|
||
beq .9
|
||
|
||
lda (ZPMemMgrTmp2)
|
||
bpl .6 In Use?
|
||
|
||
ldy #S.MEM.BIN any BIN PATH in this slot?
|
||
lda (ZPMemMgrTmp2),y
|
||
beq .6
|
||
|
||
jsr S.GetMemPtrA get pathname
|
||
bcs *
|
||
>STYA ZPMemMgrTmp3
|
||
|
||
lda (ZPMemMgrTmp1)
|
||
cmp (ZPMemMgrTmp3)
|
||
bne .6
|
||
|
||
tay
|
||
|
||
.2 lda (ZPMemMgrTmp1),y
|
||
cmp (ZPMemMgrTmp3),y
|
||
bne .6
|
||
dey
|
||
bne .2
|
||
|
||
>LDYA ZPMemMgrTmp2
|
||
|
||
clc
|
||
rts
|
||
|
||
.6 lda ZPMemMgrTmp2
|
||
clc
|
||
adc #S.MEM.SIZE
|
||
sta ZPMemMgrTmp2
|
||
bcc .7
|
||
inc ZPMemMgrTmp2+1
|
||
|
||
.7 inx
|
||
|
||
bra .1
|
||
|
||
.9 sec
|
||
rts
|
||
*--------------------------------------
|
||
S.SetLoMem
|
||
clc
|
||
rts
|
||
*--------------------------------------
|
||
S.GarbageCollector
|
||
clc
|
||
rts
|
||
*--------------------------------------
|
||
MAN
|
||
SAVE SYS/KERNEL.S.MEM
|
||
LOAD SYS/KERNEL.S
|
||
ASM
|