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Add an "sw_options" patchable global so that folks can still live life

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on the edge (of sw DMA uncertainty) with pre-built kernels.
This commit is contained in:
thorpej 1996-02-23 16:29:34 +00:00
parent 568f862aeb
commit 1a5d5e25c6
1 changed files with 11 additions and 12 deletions
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23
sys/arch/sparc/dev/si.c
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@ -1,4 +1,4 @@
/* $NetBSD: si.c,v 1.14 1996/02/23 07:24:45 thorpej Exp $ */
/* $NetBSD: si.c,v 1.15 1996/02/23 16:29:34 thorpej Exp $ */
/*
* Copyright (c) 1995 Jason R. Thorpe
@ -179,6 +179,11 @@ struct si_softc {
* Alternatively, you can patch your kernel with DDB or some other
* mechanism. The sc_options member of the softc is OR'd with
* the value in si_options.
*
* On the "sw", interrupts (and thus) reselection don't work, so they're
* disabled by default. DMA is still a little dangerous, too.
*
* Note, there's a separate sw_options to make life easier.
*/
#define SI_ENABLE_DMA 0x01 /* Use DMA (maybe polled) */
#define SI_DMA_INTR 0x02 /* DMA completion interrupts */
@ -186,6 +191,7 @@ struct si_softc {
#define SI_OPTIONS_MASK (SI_ENABLE_DMA|SI_DMA_INTR|SI_DO_RESELECT)
#define SI_OPTIONS_BITS "\10\3RESELECT\2DMA_INTR\1DMA"
int si_options = SI_ENABLE_DMA;
int sw_options = 0;
/* How long to wait for DMA before declaring an error. */
int si_dma_intr_timo = 500; /* ticks (sec. X 100) */
@ -329,17 +335,10 @@ si_attach(parent, self, args)
int i;
/* Pull in the options flags. */
if (ca->ca_bustype == BUS_OBIO) {
/*
* XXX Interrupts and reselect don't work on the "sw".
* I don't know why (yet). Disable DMA by default, too.
* It's still a little dangerous.
*/
sc->sc_options = ncr_sc->sc_dev.dv_cfdata->cf_flags &
SI_OPTIONS_MASK;
} else
sc->sc_options =
((ncr_sc->sc_dev.dv_cfdata->cf_flags | si_options) & SI_OPTIONS_MASK);
sc->sc_options =
((ncr_sc->sc_dev.dv_cfdata->cf_flags |
(ca->ca_bustype == BUS_OBIO) ? sw_options : si_options) &
SI_OPTIONS_MASK);
/* Map the controller registers. */
regs = (struct si_regs *)mapiodev(ra->ra_reg, 0,