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Clear the DMA pointer reload interrupt bits in the IOASIC_INTR 

register to prevent interrups from looping on the Alpha.

From Izumi Tsutsui <tsutsui@ceres.dti.ne.jp>.
This commit is contained in:
thorpej 2000-07-17 17:43:16 +00:00
parent ec726f07ca
commit 5e275d7012
1 changed files with 4 additions and 1 deletions
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5
sys/dev/tc/bba.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: bba.c,v 1.9 2000/07/17 04:37:27 thorpej Exp $ */ /* $NetBSD: bba.c,v 1.10 2000/07/17 17:43:16 thorpej Exp $ */
/* /*
* Copyright (c) 2000 The NetBSD Foundation, Inc. * Copyright (c) 2000 The NetBSD Foundation, Inc.
@ -599,6 +599,7 @@ bba_intr(addr)
mask = bus_space_read_4(sc->sc_bst, sc->sc_bsh, IOASIC_INTR); mask = bus_space_read_4(sc->sc_bst, sc->sc_bsh, IOASIC_INTR);
if (mask & IOASIC_INTR_ISDN_TXLOAD) { if (mask & IOASIC_INTR_ISDN_TXLOAD) {
mask &= ~IOASIC_INTR_ISDN_TXLOAD;
d = &sc->sc_tx_dma_state; d = &sc->sc_tx_dma_state;
d->curseg = (d->curseg+1) % d->dmam->dm_nsegs; d->curseg = (d->curseg+1) % d->dmam->dm_nsegs;
nphys = (tc_addr_t)d->dmam->dm_segs[d->curseg].ds_addr; nphys = (tc_addr_t)d->dmam->dm_segs[d->curseg].ds_addr;
@ -608,6 +609,7 @@ bba_intr(addr)
(*d->intr)(d->intr_arg); (*d->intr)(d->intr_arg);
} }
if (mask & IOASIC_INTR_ISDN_RXLOAD) { if (mask & IOASIC_INTR_ISDN_RXLOAD) {
mask &= ~IOASIC_INTR_ISDN_RXLOAD;
d = &sc->sc_rx_dma_state; d = &sc->sc_rx_dma_state;
d->curseg = (d->curseg+1) % d->dmam->dm_nsegs; d->curseg = (d->curseg+1) % d->dmam->dm_nsegs;
nphys = (tc_addr_t)d->dmam->dm_segs[d->curseg].ds_addr; nphys = (tc_addr_t)d->dmam->dm_segs[d->curseg].ds_addr;
@ -616,6 +618,7 @@ bba_intr(addr)
if (d->intr != NULL) if (d->intr != NULL)
(*d->intr)(d->intr_arg); (*d->intr)(d->intr_arg);
} }
bus_space_write_4(sc->sc_bst, sc->sc_bsh, IOASIC_INTR, mask);
splx(s); splx(s);