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Reset PDC devices before enabling iova space if we're not on a serial console.

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Makes glass console on four-digit B/C/J-class systems work.
This commit is contained in:
kettenis 2007-07-01 12:53:52 +00:00
parent b68e6d7799
commit 3f96c3e5ca
1 changed files with 13 additions and 1 deletions
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14
sys/arch/hppa/dev/astro.c
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@ -1,4 +1,4 @@
/* $OpenBSD: astro.c,v 1.6 2007/07/01 11:13:41 kettenis Exp $ */
/* $OpenBSD: astro.c,v 1.7 2007/07/01 12:53:52 kettenis Exp $ */
/*
* Copyright (c) 2007 Mark Kettenis
@ -292,6 +292,18 @@ astro_attach(struct device *parent, struct device *self, void *aux)
pmap_update(pmap_kernel());
memset(sc->sc_pdir, 0, size);
/*
* The PDC might have set up some devices to do DMA. It will do
* this for the onboard USB controller if an USB keyboard is used
* for console input. In that case, bad things will happen if we
* enable iova space. So reset the PDC devices before we do that.
* Don't do this if we're using a serial console though, since it
* will stop working if we do. This is fine since the serial port
* doesn't do DMA.
*/
if (PAGE0->mem_cons.pz_class != PCL_DUPLEX)
pdc_call((iodcio_t)pdc, 0, PDC_IO, PDC_IO_RESET_DEVICES);
/* Enable iova space. */
r->tlb_ibase = htole32(1);