mirror of
https://github.com/A2osX/A2osX.git
synced 2024-11-23 07:35:19 +00:00
558 lines
12 KiB
Plaintext
558 lines
12 KiB
Plaintext
PR#3
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PREFIX /A2OSX.BUILD
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LOMEM $A00
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INC 1
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AUTO 6
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*--------------------------------------
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* !!!!!! DO NOT USE ZPPtrs !!!!!
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*--------------------------------------
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ZPMemMgrSPtr .EQ ZPMEMMGR Pointer To Slot selected
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ZPMemMgrTmp1 .EQ ZPMEMMGR+2
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ZPMemMgrSrcPtr .EQ ZPMEMMGR+4
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ZPMemMgrDstPtr .EQ ZPMEMMGR+6
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*--------------------------------------
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MemMgr.ReqSize .EQ ZPMEMMGR+8 store requested Size
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MemMgr.ReqFlags .EQ ZPMEMMGR+10 store requested Flags
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*--------------------------------------
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* TODO :
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* - Create a 256 bytes table
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* mapping hMem's to real memory blocks to help
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* Garbage collector move blocks
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* - mem.ID=0 always used! useful to test if hMem=0
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*--------------------------------------
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* PUBLIC
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*/--------------------------------------
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* # GetMem
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* ## In:
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* PUSHW = Size Requested
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* PUSHB = Options
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* S.MEM.F.INIT0 : init memory with 00
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* S.MEM.F.ALIGN : page aligned
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* ## Out:
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* CC : success
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* YA = PTR to Mem
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* X = hMem
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* CS :
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* A = EC
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*\--------------------------------------
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K.GetMem >PULLB MemMgr.ReqFlags store requested flags
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and #S.MEM.F.AUX
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beq .1
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sta SETREADAUX Aux Mem requested,switch to AUX
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sta SETWRITEAUX
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.1 >PULLAX get requested size
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bit #$0F 16 bytes aligned ?
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beq .2 yes, request it
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and #$F0 align on 16 bytes
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clc
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adc #$10
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bcc .2
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inx
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.2 >STAX MemMgr.ReqSize
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jsr K.GetMem.I
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bit MemMgr.ReqFlags S.MEM.F.AUX ?
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bpl .9
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sta CLRREADAUX
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sta CLRWRITEAUX
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.9 rts
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*/--------------------------------------
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* # GetMem0.YA
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* ## In:
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* Y,A = Size Requested
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* ## Out:
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* CC : success
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* YA = PTR to Mem (ZERO Initialised)
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* X = hMem
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* CS :
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* A = EC
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*\--------------------------------------
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K.GetMem0.YA ldx #S.MEM.F.INIT0
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stx MemMgr.ReqFlags
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.HS 2C bit abs
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*/--------------------------------------
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* # GetMem.YA
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* ## In:
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* Y,A = Size Requested
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* ## Out:
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* CC : success
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* YA = PTR to Mem (Uninitialised)
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* X = hMem
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* CS :
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* A = EC
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*\--------------------------------------
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K.GetMem.YA stz MemMgr.ReqFlags
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sta MemMgr.ReqSize+1
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tya
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bit #$0F 16 bytes aligned ?
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beq .1 yes, request it
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and #$F0 align on 16 bytes
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clc
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adc #$10
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bcc .1
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inc MemMgr.ReqSize+1
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.1 sta MemMgr.ReqSize
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K.GetMem.I >LDYAI MemMgr.Table
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>STYA ZPMemMgrSPtr
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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
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jsr MemMgr.NextSlot
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lda (ZPMemMgrSPtr) Get Flags
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bmi .4 in use ?
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.2 lda MemMgr.ReqFlags Found an empty slot
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and #S.MEM.F.ALIGN is request needs a page align ?
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beq .3
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ldy #S.MEM.PTR
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lda (ZPMemMgrSPtr),y get LO of PTR
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bne .4 not page-aligned
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.3 ldy #S.MEM.LEN
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lda (ZPMemMgrSPtr),y get LEN of this block
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cmp MemMgr.ReqSize compare with requested size
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bne .4
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iny
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lda (ZPMemMgrSPtr),y
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cmp MemMgr.ReqSize+1
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beq .7 requested size matches slot size !!!
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.4 cpx MemMgr.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
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lda MemMgr.ReqFlags
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and #S.MEM.F.ALIGN is request needs a page align ?
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beq .6
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lda MemMgr.Free target PTR will be page aligned ?
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sec
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sbc MemMgr.ReqSize
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beq .6 yes, allocate
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tay no, reserve a free slot to fill gap
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lda #0
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jsr MemMgr.AddSlot X = new slot
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bcs .9
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.6 >LDYA MemMgr.ReqSize
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jsr MemMgr.AddSlot X = new slot
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bcs .9
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*-------------- Reuse this SLOT
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.7 lda MemMgr.ReqFlags get requested flags
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ora #S.MEM.F.INUSE mark as in use
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sta (ZPMemMgrSPtr)
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and #S.MEM.F.INIT0
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beq .8
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jsr MemMgr.Init0 X not modified
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.8 lda #0
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ldy #S.MEM.BIN
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sta (ZPMemMgrSPtr),y
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inc Mark this slot used by one process
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ldy #S.MEM.REFCNT
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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
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sta (ZPMemMgrSPtr),y
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ldy #S.MEM.PTR
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lda (ZPMemMgrSPtr),y
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pha
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iny
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lda (ZPMemMgrSPtr),y A = HI PTR
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ply Y = LO PTR
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clc X = Current hMem
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.9 rts
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*--------------------------------------
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* MemMgr.AddSlot
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* In:
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* Y,A = Requested size
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* Out:
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*--------------------------------------
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MemMgr.AddSlot >STYA ZPMemMgrTmp1 save req size
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ldx MemMgr.LastSlot
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inx
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beq .99 > 255 ERR:OUT OF SLOT
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lda MemMgr.Free Compute base PTR=FREE-REQ size
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sec
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sbc ZPMemMgrTmp1
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tay save new MemMgr.Free LO
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lda MemMgr.Free+1
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sbc ZPMemMgrTmp1+1
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pha save new MemMgr.Free HI
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cpy MemMgr.LoMem
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sbc MemMgr.LoMem+1
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bcc .98 ERR out of mem
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jsr MemMgr.NextSlot X,Y unmodified
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tya get back MemMgr.Free LO
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ldy #S.MEM.PTR
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sta MemMgr.Free set as system MemMgr.Free value
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sta (ZPMemMgrSPtr),y store is as base address of new slot
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iny
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pla get back MemMgr.Free HI
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sta MemMgr.Free+1
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sta (ZPMemMgrSPtr),y
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iny
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lda ZPMemMgrTmp1 get requested size
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sta (ZPMemMgrSPtr),y setup slot LEN
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iny
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lda ZPMemMgrTmp1+1
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sta (ZPMemMgrSPtr),y
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stx MemMgr.LastSlot mark this slot allocated
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clc
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rts
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.98 pla discard new MemMgr.Free HI
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lda #MemMgr.ERROOM
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sec
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rts
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.99 lda #MemMgr.ERROOH
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sec
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rts
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*--------------------------------------
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MemMgr.NextSlot lda ZPMemMgrSPtr
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clc
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adc #S.MEM
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sta ZPMemMgrSPtr
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bcc .8
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inc ZPMemMgrSPtr+1
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.8 rts
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*--------------------------------------
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MemMgr.Init0 ldy #S.MEM.PTR
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lda (ZPMemMgrSPtr),y ZPMemMgrSPtr already set
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sta .2+1
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iny
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lda (ZPMemMgrSPtr),y
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sta .2+2
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ldy #S.MEM.LEN
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lda (ZPMemMgrSPtr),y
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eor #$ff
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pha
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iny
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lda (ZPMemMgrSPtr),y
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eor #$ff a=not hi count
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ply y=not lo count
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phx
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ldx #0
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.1 iny
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bne .2
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inc
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beq .8
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.2 stz $ffff,x
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inx
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bne .1
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inc .2+2
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bne .1
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.8 plx
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rts
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*/--------------------------------------
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* # FreeMem.A
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* ## In:
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* A = hMem To Free
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* ## Out:
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* none.
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* (X,Y unmodified)
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*\--------------------------------------
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K.FreeMem.A phy
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tay
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beq * Slot=0, reserved by Kernel
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jsr K.GetMemByID.A X unmodified
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lda (ZPMemMgrSPtr)
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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
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dec only one left ?
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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
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sta (ZPMemMgrSPtr)
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ldy #S.MEM.BIN
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lda (ZPMemMgrSPtr),y Any BINPATH to discard ?
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beq .1
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jsr K.GetMemByID.A 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)
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.1 lda MemMgr.LastSlot
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beq .8
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jsr K.GetMemByID.A X unmodified
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lda (ZPMemMgrSPtr)
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bmi .8
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ldy #S.MEM.LEN
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lda (ZPMemMgrSPtr),y give back LEN bytes
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clc
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adc MemMgr.Free to MemMgr.Free
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sta MemMgr.Free
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iny
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lda (ZPMemMgrSPtr),y
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adc MemMgr.Free+1
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sta MemMgr.Free+1
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dec MemMgr.LastSlot discard last slot
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bne .1 no slot left, exit
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.8 ply
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clc
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rts
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*--------------------------------------
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.9 ply discard saved Y
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lda $D000
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sta .91+1
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bit RRAMWRAMBNK2
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bit RRAMWRAMBNK2
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>LDYAI TskMgr.Table Delect PS0 for proper In/out devices
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>STYA pPs
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jsr DevMgr.SYS.Control
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pla Get PC and sub 2 for calling address
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sec
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sbc #2
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tay
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pla
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sbc #0
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>PUSHYA
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>LDYAI K.FreeMem.A.ERR
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jsr K.PrintF.YA
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.91 ldx #$ff
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bit $C000,x
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bit $C000,x
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bra *
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*--------------------------------------
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K.FreeMem.A.ERR >CSTR "***MemMgr:Attempt to Free an already freed hMem at $%H"
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*/--------------------------------------
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* # GetMemPtr.A
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* ## In:
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* A = hMem
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* ## Out:
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* Y,A = PTR to MemBlock
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* (X unmodified)
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*\--------------------------------------
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K.GetMemPtr.A jsr K.GetMemByID.A
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ldy #S.MEM.PTR
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lda (ZPMemMgrSPtr),y
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pha
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iny
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lda (ZPMemMgrSPtr),y
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ply
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rts
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*/--------------------------------------
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* # GetMemByID.A
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* ## In:
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* A = hMem
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* ## Out:
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* Y,A = ZPMemMgrSPtr = PTR to S.MEM
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* X unmodified
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*\--------------------------------------
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* Optimized for :
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* MemMgr.Table is page aligned at $1800
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* S.MEM is 8 bytes
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*--------------------------------------
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.DO MemMgr.Table=$1800
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.ELSE
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!!!!!WARNING!!!!!
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.FIN
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.DO S.MEM=8
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.ELSE
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!!!!!WARNING!!!!!
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.FIN
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*--------------------------------------
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K.GetMemByID.A sta ZPMemMgrSPtr
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lda /MemMgr.Table/8
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asl ZPMemMgrSPtr
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rol
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asl ZPMemMgrSPtr
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rol
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asl ZPMemMgrSPtr
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rol
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sta ZPMemMgrSPtr+1
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ldy ZPMemMgrSPtr
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rts
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*--------------------------------------
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* OLD CODE
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*--------------------------------------
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* stz ZPMemMgrSPtr+1
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* asl
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* rol ZPMemMgrSPtr+1
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* asl
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* rol ZPMemMgrSPtr+1
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* asl
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* rol ZPMemMgrSPtr+1
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** clc IMPLICIT
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* adc #MemMgr.Table
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* tay
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* lda ZPMemMgrSPtr+1
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* adc /MemMgr.Table
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* sty ZPMemMgrSPtr
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* sta ZPMemMgrSPtr+1
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* rts
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*--------------------------------------
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K.LoadStkObj.YA
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*--------------------------------------
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K.GetStkObj.A
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*--------------------------------------
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K.FreeStkObj.A
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*--------------------------------------
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K.SetLoMem
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clc
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rts
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*/--------------------------------------
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* # GetMemStat.YA
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* ## In:
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* Y,A = 24 bytes buffer
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* ## Out:
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* Buffer filled with memory stats
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*\--------------------------------------
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K.GetMemStat.YA >STYA ZPMemMgrDstPtr
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ldy #6
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.1 lda MemMgr.Table,y
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sta (ZPMemMgrDstPtr),y
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dey
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bpl .1
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ldx #6
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ldy #14
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sta SETREADAUX
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.2 lda MemMgr.Table,x
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sta (ZPMemMgrDstPtr),y
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dey
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dex
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bpl .2
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sta CLRREADAUX
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ldx #6
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ldy #22
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.3 lda DevMgr.Stat,x
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sta (ZPMemMgrDstPtr),y
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dey
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dex
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bpl .3
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rts
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*--------------------------------------
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* In:
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* Y,A = BINPATH (PSTR)
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* Out:
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* Y,A = ZPMemMgrSPtr = PTR to S.MEM
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* X = hMem
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*--------------------------------------
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MEM.GetMemByNameYA
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ldx MemMgr.LastSlot
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beq .9
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>STYA ZPMemMgrSrcPtr SAVE BINPATH
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>LDYAI MemMgr.Table
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>STYA ZPMemMgrTmp1
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ldx #0
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.1 lda (ZPMemMgrTmp1)
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bpl .6 In Use?
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ldy #S.MEM.BIN any BIN PATH in this slot?
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lda (ZPMemMgrTmp1),y
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beq .6
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jsr K.GetMemPtr.A get pathname
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>STYA ZPMemMgrDstPtr
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lda (ZPMemMgrSrcPtr)
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cmp (ZPMemMgrDstPtr)
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bne .6
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tay
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.2 lda (ZPMemMgrSrcPtr),y
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cmp (ZPMemMgrDstPtr),y
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bne .6
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dey
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bne .2
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>LDYA ZPMemMgrTmp1
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clc
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rts
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.6 lda ZPMemMgrTmp1
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clc
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adc #S.MEM
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sta ZPMemMgrTmp1
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bcc .7
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inc ZPMemMgrTmp1+1
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.7 inx
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cpx MemMgr.LastSlot
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bne .1
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.9 sec
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rts
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*--------------------------------------
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MEM.GarbageCollector
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clc
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rts
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*--------------------------------------
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MAN
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SAVE /A2OSX.SRC/SYS/KERNEL.S.MEM
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LOAD /A2OSX.SRC/SYS/KERNEL.S
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ASM
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