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author | rnoland <rnoland@FreeBSD.org> | 2009-03-22 21:00:58 +0000 |
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committer | rnoland <rnoland@FreeBSD.org> | 2009-03-22 21:00:58 +0000 |
commit | 372b71c71052f117abe52e6826cc68caff123083 (patch) | |
tree | 8bb0a6349d7d0ba78b3929197e4a93e7ccc02ca0 /share/man/man9/bus_dma.9 | |
parent | adefdc48e52fbaa1b6f4cf1f49518c586ffdfa41 (diff) | |
download | FreeBSD-src-372b71c71052f117abe52e6826cc68caff123083.zip FreeBSD-src-372b71c71052f117abe52e6826cc68caff123083.tar.gz |
Correct the documentation to reflect the fact that BUS_DMA_NOCACHE is a
flag to bus_dmamem_alloc() rather than bus_dmamap_load();
Discussed with: kib
MFC after: 3 days
Diffstat (limited to 'share/man/man9/bus_dma.9')
-rw-r--r-- | share/man/man9/bus_dma.9 | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/share/man/man9/bus_dma.9 b/share/man/man9/bus_dma.9 index 5850db6..dc5ae4b 100644 --- a/share/man/man9/bus_dma.9 +++ b/share/man/man9/bus_dma.9 @@ -561,15 +561,6 @@ Are as follows: .It Dv BUS_DMA_NOWAIT The load should not be deferred in case of insufficient mapping resources, and instead should return immediately with an appropriate error. -.It Dv BUS_DMA_NOCACHE -The allocated memory will not be cached in the processor caches. -All memory accesses appear on the bus and are executed -without reordering. -On the amd64 and i386 architectures this flag results in the -Strong Uncacheable PAT to be set for the allocated virtual address range. -The -.Dv BUS_DMA_NOCACHE -flag is currently implemented on amd64, i386 and sparc64. .El .El .Pp @@ -785,6 +776,15 @@ the flag is currently implemented on arm and sparc64. .It Dv BUS_DMA_ZERO Causes the allocated memory to be set to all zeros. +.It Dv BUS_DMA_NOCACHE +The allocated memory will not be cached in the processor caches. +All memory accesses appear on the bus and are executed +without reordering. +On the amd64 and i386 architectures this flag results in the +Strong Uncacheable PAT to be set for the allocated virtual address range. +The +.Dv BUS_DMA_NOCACHE +flag is currently implemented on amd64, i386 and sparc64. .El .It Fa mapp Pointer to a |