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Correct the documentation to reflect the fact that BUS_DMA_NOCACHE is a

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flag to bus_dmamem_alloc() rather than bus_dmamap_load();

Discussed with:	kib
MFC after:	3 days
This commit is contained in:
Robert Noland 2009-03-22 21:00:58 +00:00
parent 746871c800
commit ba0b16188e
1 changed files with 9 additions and 9 deletions
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18
share/man/man9/bus_dma.9
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@ -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