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added irq handler stubs (intended for calling C routines) for M5484 PCI interrupts INTA-INTD (mapped to Coldfire interrupts #5 and #7)

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Markus Fröschle
2013-12-16 13:06:03 +00:00
parent 0b3ce22164
commit 41582c0381
1 changed files with 62 additions and 7 deletions
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69
sources/exceptions.S
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@@ -637,17 +637,72 @@ irq3:
irq4: // vbl
irq 0x70,4,0x10
irq5: // irq5 is tied to PCI INTC# and PCI INTD# on the M5484LITE
irq 0x74,5,0x20
#if MACHINE_M5484LITE // handlers for M5484LITE
irq5: // irq5 is tied to PCI INTC# and PCI INTD# on the M5484LITE
move.w #0x2700,sr // disable interrupts
lea -8(sp),sp // make room
movem.l d0/a5,(sp) // save registers
lea MCF_EPORT_EPFR,a5
bset #5,(a5) // clear int5 from edge port
lea -4*4(sp),sp // save gcc scratch registers
movem.l d0-d1/a0-a1,(sp)
pea irq5text
jsr _xprintf
addq.l #4,sp // fix stack
// jsr _irq5_handler // call C handler routine
movem.l (sp),d0-d1/a0-a2 // restore registers
lea 4*4(sp),sp
movem.l (sp),d0/a5 // restore registers
lea 8(sp),sp // adjust stack
rte // return from exception
irq5text:
.ascii "IRQ5!"
.dc.b 13,10,0
#if MACHINE_M5484LITE // install "standard" handlers for M5484LITE
irq6:
irq 0x74,5,0x20
irq7: // irq7 is tied to PCI INTA# and PCI INTB# on the M5484LITE
irq 0x74,5,0x20
irq7: // irq7 is tied to PCI INTA# and PCI INTB# on the M5484LITE
move.w #0x2700,sr // disable interrupts
lea -8(sp),sp // make room
movem.l d0/a5,(sp) // save registers
lea MCF_EPORT_EPFR,a5
bset #7,(a5) // clear int5 from edge port
lea -4*4(sp),sp // save gcc scratch registers
movem.l d0-d1/a0-a1,(sp)
pea irq7text
jsr _xprintf
addq.l #4,sp // fix stack
// jsr _irq7_handler // call C handler routine
movem.l (sp),d0-d1/a0-a2 // restore registers
lea 4*4(sp),sp
movem.l (sp),d0/a5 // restore registers
lea 8(sp),sp // adjust stack
rte // return from exception
irq7text:
.ascii "IRQ7!"
.dc.b 13,10,0
#elif MACHINE_FIREBEE /* these handlers are only meaningful for the Firebee */
irq5: // irq5 is tied to PCI INTC# and PCI INTD# on the M5484LITE
irq 0x74,5,0x20
irq6: // MFP interrupt from FPGA
move.w #0x2700,sr // disable interrupt
subq.l #8,a7
@@ -1001,9 +1056,9 @@ handler_gpt0:
sca_other:
lsl.l #8,d0 // build new screen start address from Atari register contents
move.b 0xffff8203,d0 // mid byt
move.b 0xffff8203,d0 // mid byte
lsl.l #8,d0
move.b 0xffff820d,d0 // low byt
move.b 0xffff820d,d0 // low byte
move.l d0,d3
video_chg_1page: