diff options
| -rw-r--r-- | sys/arch/macppc/macppc/dma.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/sys/arch/macppc/macppc/dma.c b/sys/arch/macppc/macppc/dma.c index ef8c1a3291c..68acbec18f1 100644 --- a/sys/arch/macppc/macppc/dma.c +++ b/sys/arch/macppc/macppc/dma.c @@ -1,4 +1,4 @@ -/* $OpenBSD: dma.c,v 1.1 2001/09/01 15:44:20 drahn Exp $ */ +/* $OpenBSD: dma.c,v 1.2 2001/09/15 01:40:36 mickey Exp $ */ /* $NetBSD: machdep.c,v 1.214 1996/11/10 03:16:17 thorpej Exp $ */ /*- @@ -260,8 +260,28 @@ _dmamap_load_raw(t, map, segs, nsegs, size, flags) bus_size_t size; int flags; { + if (nsegs > map->_dm_segcnt || size > map->_dm_size) + return (EINVAL); - panic("_bus_dmamap_load_raw: not implemented"); + /* + * Make sure we don't cross any boundaries. + */ + if (map->_dm_boundary) { + bus_addr_t bmask = ~(map->_dm_boundary - 1); + int i; + + for (i = 0; i < nsegs; i++) { + if (segs[i].ds_len > map->_dm_maxsegsz) + return (EINVAL); + if ((segs[i].ds_addr & bmask) != + ((segs[i].ds_addr + segs[i].ds_len - 1) & bmask)) + return (EINVAL); + } + } + + bcopy(segs, map->dm_segs, nsegs * sizeof(*segs)); + map->dm_nsegs = nsegs; + return (0); } /* |