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Rename sc_hasiocache' => sc_cachecoherent'. Avoid the cache flush in

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dma_load() if we have coherency.
This commit is contained in:
pk 2004-04-28 12:38:19 +00:00
parent ff7821ed81
commit 84af51b7e0
1 changed files with 10 additions and 10 deletions
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20
sys/arch/sparc/sparc/iommu.c
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@ -1,4 +1,4 @@
/* $NetBSD: iommu.c,v 1.79 2004/03/28 19:35:13 pk Exp $ */
/* $NetBSD: iommu.c,v 1.80 2004/04/28 12:38:19 pk Exp $ */
/*
* Copyright (c) 1996
@ -37,7 +37,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: iommu.c,v 1.79 2004/03/28 19:35:13 pk Exp $");
__KERNEL_RCSID(0, "$NetBSD: iommu.c,v 1.80 2004/04/28 12:38:19 pk Exp $");
#include "opt_sparc_arch.h"
@ -68,7 +68,7 @@ struct iommu_softc {
u_int sc_range;
bus_addr_t sc_dvmabase;
iopte_t *sc_ptes;
int sc_hasiocache;
int sc_cachecoherent;
/*
* Note: operations on the extent map are being protected with
* splhigh(), since we cannot predict at which interrupt priority
@ -77,7 +77,6 @@ struct iommu_softc {
struct sparc_bus_dma_tag sc_dmatag;
struct extent *sc_dvmamap;
};
static int has_iocache;
/* autoconfiguration driver */
int iommu_print __P((void *, const char *));
@ -210,11 +209,10 @@ iommu_attach(parent, self, aux)
}
sc->sc_reg = (struct iommureg *)bh;
sc->sc_hasiocache = js1_implicit_iommu ? 0
sc->sc_cachecoherent = js1_implicit_iommu ? 0
: node_has_property(node, "cache-coherence?");
if (CACHEINFO.c_enabled == 0) /* XXX - is this correct? */
sc->sc_hasiocache = 0;
has_iocache = sc->sc_hasiocache; /* Set global flag */
sc->sc_cachecoherent = 0;
sc->sc_pagesize = js1_implicit_iommu ? PAGE_SIZE
: prom_getpropint(node, "page-size", PAGE_SIZE),
@ -412,7 +410,7 @@ iommu_enter(struct iommu_softc *sc, bus_addr_t dva, paddr_t pa)
pte = atop(pa) << IOPTE_PPNSHFT;
pte &= IOPTE_PPN;
pte |= IOPTE_V | IOPTE_W | (has_iocache ? IOPTE_C : 0);
pte |= IOPTE_V | IOPTE_W | (sc->sc_cachecoherent ? IOPTE_C : 0);
sc->sc_ptes[atop(dva - sc->sc_dvmabase)] = pte;
IOMMU_FLUSHPAGE(sc, dva);
}
@ -603,7 +601,8 @@ iommu_dmamap_load(t, map, buf, buflen, p, flags)
&dva, &sgsize)) != 0)
return (error);
cache_flush(buf, buflen); /* XXX - move to bus_dma_sync? */
if (sc->sc_cachecoherent == 0)
cache_flush(buf, buflen); /* XXX - move to bus_dma_sync? */
/*
* We always use just one segment.
@ -786,6 +785,7 @@ iommu_dmamem_map(t, segs, nsegs, size, kvap, flags)
caddr_t *kvap;
int flags;
{
struct iommu_softc *sc = t->_cookie;
struct vm_page *m;
vaddr_t va;
bus_addr_t addr;
@ -797,7 +797,7 @@ iommu_dmamem_map(t, segs, nsegs, size, kvap, flags)
if (nsegs != 1)
panic("iommu_dmamem_map: nsegs = %d", nsegs);
cbit = has_iocache ? 0 : PMAP_NC;
cbit = sc->sc_cachecoherent ? 0 : PMAP_NC;
align = dvma_cachealign ? dvma_cachealign : pagesz;
size = round_page(size);