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Implement bus_dmamem_mmap().

This commit is contained in:
thorpej 1997-09-05 02:05:37 +00:00
parent c80051ee4e
commit 55800b610a
1 changed files with 23 additions and 3 deletions
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26
sys/arch/alpha/common/bus_dma.c
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@ -1,4 +1,4 @@
/* $NetBSD: bus_dma.c,v 1.5 1997/09/02 20:37:23 thorpej Exp $ */
/* $NetBSD: bus_dma.c,v 1.6 1997/09/05 02:05:37 thorpej Exp $ */
/*-
* Copyright (c) 1997 The NetBSD Foundation, Inc.
@ -39,7 +39,7 @@
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: bus_dma.c,v 1.5 1997/09/02 20:37:23 thorpej Exp $");
__KERNEL_RCSID(0, "$NetBSD: bus_dma.c,v 1.6 1997/09/05 02:05:37 thorpej Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -464,6 +464,26 @@ _bus_dmamem_mmap(t, segs, nsegs, off, prot, flags)
bus_dma_segment_t *segs;
int nsegs, off, prot, flags;
{
int i;
panic("_bus_dmamem_mmap: not implemented");
for (i = 0; i < nsegs; i++) {
#ifdef DIAGNOSTIC
if (off & PGOFSET)
panic("_bus_dmamem_mmap: offset unaligned");
if (segs[i].ds_addr & PGOFSET)
panic("_bus_dmamem_mmap: segment unaligned");
if (segs[i].ds_len & PGOFSET)
panic("_bus_dmamem_mmap: segment size not multiple"
" of page size");
#endif
if (off >= segs[i].ds_len) {
off -= segs[i].ds_len;
continue;
}
return (alpha_btop((caddr_t)segs[i].ds_addr + off));
}
/* Page not found. */
return (-1);
}