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rewritten mmu_map_page() and put into production

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This commit is contained in:
Markus Fröschle
2014-09-07 19:01:19 +00:00
parent cd341c499a
commit 87bd9eb2c6
5 changed files with 132 additions and 186 deletions
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44
BaS_gcc/sys/exceptions.S
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@@ -547,12 +547,10 @@ irq6: // MFP interrupt from FPGA
lea MCF_EPORT_EPFR,a5 // clear int6 from edge port
bset #6,(a5)
// there was a potential bug here before: would also clear all other edge port interrupts that might have happened...
// move.b #0x40,(a5) // clear int6 from edge port
// screen adr change timed out?
// screen adr change timed out?
move.l _video_sbt,d0
beq irq6_non_sca // nothing to do if 0
sub.l #0x70000000,d0 // substract 14 seconds
lea MCF_SLT0_SCNT,a5
cmp.l (a5),d0 // time reached?
@@ -588,7 +586,7 @@ irq6: // MFP interrupt from FPGA
add.l #copyback_mmudr,d1 // sonst page cb
bra irq6_sca_pn1c
irq6_sca_pn0:
add.l #writethrough_mmudr|MCF_MMU_MMUDR_LK,d1 // page wt and locked
add.l #writethrough_mmudr/*|MCF_MMU_MMUDR_LK*/,d1 // page wt and locked
irq6_sca_pn1c:
mvz.w #0x10b,d2 // MMU update
move.l d0,MCF_MMU_MMUTR
@@ -649,11 +647,6 @@ irq6_1:
lea MCF_GPIO_PODR_FEC1L,a5
bset.b #4,(a5) // led off
irq6_2:
// test auf protect mode ---------------------
move.b DIP_SWITCHa,d0
btst #7,d0
bne irq6_3 // ja->
// -------------------------------------------
move.l 0xF0020000,a5 // vector holen
add.l _rt_vbr,a5 // basis
move.l (a5),d0 // vector holen
@@ -662,33 +655,6 @@ irq6_2:
move.l (a7)+,d0 // d0 zurück
move #0x2600,sr
rts
irq6_3:
move.l usp,a5 // usp holen
tst.b _rt_mod // supervisor?
bne sev_sup6 // ja ->
mov3q.l #-1,_rt_mod // auf supervisor setzen
move.l a5,_rt_usp // rt_usp speichern
move.l _rt_ssp,a5 // rt_ssp holen
move.l 12(a7),-(a5) // pc transferieren
move.l 8(a7),-(a5) // sr transferieren
move.l a5,usp // usp setzen
move.l 0xF0020000,a5 // vector holen: intack routine
add.l _rt_vbr,a5 // virtuelle VBR des Systems
move.l (a5),12(a7) // hier gehts weiter
movem.l (a7),d0/a5 // register zurück
addq.l #8,a7
move.b #6,2(a7) // intmaske setzen
rte // und weg
sev_sup6:
move.l 12(a7),-(a5) // pc transferieren
move.l 8(a7),-(a5) // sr,vec
bset #5,2(a5) // auf super setzen
move.l a5,usp // usp setzen
move.l 0xF0020000,a5 // vector holen: intack routine
add.l _rt_vbr,a5 // virtuelle VBR des Systems
move.l (a5),12(a7) // hier gehts weiter
movem.l (a7),d0/a5 // register zurück
rts
.data
blinker:.long 0
@@ -844,7 +810,7 @@ video_copy_data_loop:
bne video_copy_data_loop
// eintrag suchen
move.l d0,MCF_MMU_MMUAR // adress
move.l d0,MCF_MMU_MMUAR // address
move.l #0x106,d4
move.l d4,MCF_MMU_MMUOR // search -> new one will be offered if not found
nop
@@ -854,7 +820,7 @@ video_copy_data_loop:
move.l d4,MCF_MMU_MMUAR
move.l d0,d1
add.l #MCF_MMU_MMUTR_ID(sca_page_ID)|std_mmutr,d0
add.l #0x60000000|writethrough_mmudr|MCF_MMU_MMUDR_LK,d1
add.l #0x60000000|writethrough_mmudr /* |MCF_MMU_MMUDR_LK */,d1
mvz.w #0x10b,d2 // MMU update
move.l d0,MCF_MMU_MMUTR
move.l d1,MCF_MMU_MMUDR