53 lines
907 B
ArmAsm
53 lines
907 B
ArmAsm
/*
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** gint:dma:inth - Interrupt handler for the DMA
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** An easy one, just clears some flags and marks all transfers as finished.
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*/
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.global _inth_dma_te
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.global _inth_dma_ae
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.section .gint.blocks, "ax"
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.align 4
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/* DMA TRANSFER ENDED INTERRUPT HANDLER - 32 BYTES */
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_inth_dma_te:
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/* Clear the TE flag and DMA Enable in CHCR */
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mov.l 1f, r1
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mov.l @r1, r0
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mov #-4, r2
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and r2, r0
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mov.l r0, @r1
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/* Clear the AE and NMIF flags in OR */
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mov.l 2f, r1
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mov.w @r1, r0
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mov #-7, r2
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and r2, r0
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mov.w r0, @r1
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rte
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nop
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1: .long 0 /* CHCR, set dynamically */
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2: .long 0xfe008060 /* DMA.OR */
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/* DMA ADDRESS ERROR INTERRUPT HANDLER - 18 BYTES */
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_inth_dma_ae:
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/* Manually RTE into the panic routine, preserving SPC */
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mov.l 2f, r4
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ldc r4, r4_bank
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/* This instruction changes register bank! */
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stc ssr, r1
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ldc r1, sr
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mov.l 1f, r0
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jmp @r0
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nop
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.zero 10
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1: .long _gint_panic
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2: .long 0x1020
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