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Add a pointer to an array of DMA ranges. DMA buffers must lie within

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a range, or else an error is returned when loading a map.  If the ranges
pointer is NULL, no range checks are performed.
This commit is contained in:
thorpej 1998-06-28 03:22:10 +00:00
parent fe00c5db7f
commit 3497ab9a8c
1 changed files with 10 additions and 1 deletions
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11
sys/arch/arm32/include/bus.h
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@ -1,4 +1,4 @@
/* $NetBSD: bus.h,v 1.11 1998/06/27 02:16:23 thorpej Exp $ */
/* $NetBSD: bus.h,v 1.12 1998/06/28 03:22:10 thorpej Exp $ */
/*-
* Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc.
@ -646,6 +646,15 @@ typedef struct arm32_bus_dma_segment bus_dma_segment_t;
*/
struct arm32_bus_dma_tag {
/*
* DMA range for this tag. If the page doesn't fall within
* one of these ranges, an error is returned. The caller
* may then decide what to do with the transfer. If the
* range pointer is NULL, it is ignored.
*/
bus_dma_segment_t *_ranges;
int _nranges;
/*
* DMA mapping methods.
*/