gint/src/dma/inth.s

50 lines
802 B
ArmAsm

/*
** gint:dma:inth - Interrupt handler for the DMA
** An easy one, just clears some flags and marks all transfers as finished.
*/
.global _inth_dma_te
.global _inth_dma_ae
.section .gint.blocks, "ax"
.align 4
/* DMA TRANSFER ENDED INTERRUPT HANDLER - 32 BYTES */
_inth_dma_te:
/* Clear the TE flag and DMA Enable in CHCR */
mov.l 1f, r1
mov.l @r1, r0
mov #-4, r2
and r2, r0
mov.l r0, @r1
/* Clear the AE and NMIF flags in OR */
mov.l 2f, r1
mov.w @r1, r0
mov #-7, r2
and r2, r0
mov.w r0, @r1
rte
nop
1: .long 0 /* CHCR, set dynamically */
2: .long 0xfe008060 /* DMA.OR */
/* DMA ADDRESS ERROR INTERRUPT HANDLER - 18 BYTES */
_inth_dma_ae:
/* Call a fixed function */
sts.l pr, @-r15
mov.l 1f, r1
jsr @r1
nop
lds.l @r15+, pr
rte
nop
.zero 14
1: .long _gint_dma_ae