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This commit is contained in:
Markus Fröschle
2014-09-18 20:13:54 +00:00
parent 0801adb0c0
commit 36a7a593d9
1 changed files with 536 additions and 536 deletions
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40
BaS_gcc/sys/exceptions.S
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@@ -538,8 +538,10 @@ irq7: // irq7 is tied to PCI INTA# and PCI INTB# on the M5484LITE
rte // return from exception rte // return from exception
irq7text: irq7text:
.data
.ascii "IRQ7!" .ascii "IRQ7!"
.dc.b 13,10,0 .dc.b 13,10,0
.text
#elif MACHINE_FIREBEE /* these handlers are only meaningful for the Firebee */ #elif MACHINE_FIREBEE /* these handlers are only meaningful for the Firebee */
irq5: // irq5 is tied to PCI INTC# and PCI INTD# on the M5484LITE irq5: // irq5 is tied to PCI INTC# and PCI INTD# on the M5484LITE
@@ -769,7 +771,6 @@ handler_gpt0:
lea -7 * 4(sp),sp // save registers lea -7 * 4(sp),sp // save registers
movem.l d0-d4/a0-a1,(sp) movem.l d0-d4/a0-a1,(sp)
mvz.b vbasehi,d0 // screen base address high mvz.b vbasehi,d0 // screen base address high
cmp.w #2,d0 // screen base lower than 0x20000? cmp.w #2,d0 // screen base lower than 0x20000?
blt video_chg_end // yes, do nothing blt video_chg_end // yes, do nothing
@@ -788,15 +789,14 @@ sca_other:
move.b 0xffff8203,d0 // mid byte move.b 0xffff8203,d0 // mid byte
lsl.l #8,d0 lsl.l #8,d0
move.b 0xffff820d,d0 // low byte move.b 0xffff820d,d0 // low byte
move.l d0,d3 move.l d0,d3 // d0 and d3 now contain the video memory start address
video_chg_1page: video_chg_1page:
// check if page is already marked as video page
moveq #20,d4 moveq #20,d4
move.l d0,d2 move.l d0,d2
lsr.l d4,d2 // new page lsr.l d4,d2 // shift right by 20 bit -> page number (MB pages)
move.l _video_tlb,d4 move.l _video_tlb,d4 // save to video pages bitmask
bset.l d2,d4 // set as changed bset.l d2,d4 // set as newly set
bne video_chg_2page // was it set already? bne video_chg_2page // was it set already?
move.l d4,_video_tlb move.l d4,_video_tlb
// jsr _flush_and_invalidate_caches FIXME: why should we need that? // jsr _flush_and_invalidate_caches FIXME: why should we need that?
@@ -807,10 +807,10 @@ video_copy_data:
move.l d0,a0 move.l d0,a0
move.l a0,a1 move.l a0,a1
add.l #0x60000000,a1 add.l #0x60000000,a1
move.l #0x10000,d4 // whole page move.l #0x10000,d4 // 16 bytes per copy -> 1 MB
video_copy_data_loop: video_copy_data_loop:
move.l (a0)+,(a1)+ // copy video page contents to real screen move.l (a0)+,(a1)+ // copy video page contents to FPGA memory
move.l (a0)+,(a1)+ move.l (a0)+,(a1)+
move.l (a0)+,(a1)+ move.l (a0)+,(a1)+
move.l (a0)+,(a1)+ move.l (a0)+,(a1)+
@@ -834,33 +834,33 @@ video_copy_data_loop:
move.l d1,MCF_MMU_MMUDR move.l d1,MCF_MMU_MMUDR
move.l d2,MCF_MMU_MMUOR // setzen vidoe maped to 60xxx only data move.l d2,MCF_MMU_MMUOR // setzen vidoe maped to 60xxx only data
nop nop
video_chg_2page: video_chg_2page:
// test of adjacent page is needed also // calculate screen memory size
move.l d3,d0 move.l d3,d0
mvz.w 0xffff8210,d4 // VWRAP: words per scanline mvz.w 0xffff8210,d4 // VWRAP: words per scanline
mvz.w 0xffff82aa,d2 // VDE: vertical display end mvz.w 0xffff82aa,d2 // VDE: vertical display end
mvz.w 0xffff82a8,d1 // VDB: vertical display begin mvz.w 0xffff82a8,d1 // VDB: vertical display begin
sub.l d1,d2 // number of lines sub.l d1,d2 // number of lines
mulu d2,d4 // times number of words per line mulu d2,d4 // times number of words per line
add.l d4,d0 // video memory end address add.l d4,d0 // calculate end address
cmp.l #__STRAM_END,d0 // start address > end of STRAM? cmp.l #__STRAM_END,d0 // > end of STRAM?
bge video_chg_end // yes - we're finished bge video_chg_end // yes - we're finished
moveq #20,d4 // shift right by 20 bit -> page number (MB pages)
moveq #20,d4
move.l d0,d2 move.l d0,d2
lsr.l d4,d2 // neue page lsr.l d4,d2 // calculate page number
move.l _video_tlb,d4 move.l _video_tlb,d4
bset.l d2,d4 // setzen als ge<EFBFBD>ndert bset.l d2,d4 // set as changed
beq video_copy_data // nein nochmal beq video_copy_data // was not set yet, copy
jsr _flush_and_invalidate_caches jsr _flush_and_invalidate_caches
video_chg_end: video_chg_end:
lea MCF_GPT0_GMS,a0 // disable and reenable timer lea MCF_GPT0_GMS,a0 // disable and reenable trigger
bclr.b #0,3(a0) // input capture bclr.b #0,3(a0)
nop nop
bset.b #0,3(a0) bset.b #0,3(a0)
movem.l (sp),d0-d4/a0-a1 // restore saved registers
movem.l (a7),d0-d4/a0-a1 // restore saved registers
lea 7 * 4(sp),a7 lea 7 * 4(sp),a7
rte rte
#endif /* MACHINE_FIREBEE */ #endif /* MACHINE_FIREBEE */