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author | wkoszek <wkoszek@FreeBSD.org> | 2008-06-09 22:13:14 +0000 |
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committer | wkoszek <wkoszek@FreeBSD.org> | 2008-06-09 22:13:14 +0000 |
commit | 407d56cbcfa6ec0869c28bf403f2674560cc3321 (patch) | |
tree | 4dd48c70af84e8a368ed2f25e79eb8a961b661ef /share/man/man9/bus_dma.9 | |
parent | 5a286929e41642d75ff6b11b84f4adda4c3530d7 (diff) | |
download | FreeBSD-src-407d56cbcfa6ec0869c28bf403f2674560cc3321.zip FreeBSD-src-407d56cbcfa6ec0869c28bf403f2674560cc3321.tar.gz |
Mark "highaddr" and "lowaddr" appropriately. Change "dma" to "DMA".
Fix spelling mistage found by rodrigc@.
Reviewed by: rodrigc, danger
Diffstat (limited to 'share/man/man9/bus_dma.9')
-rw-r--r-- | share/man/man9/bus_dma.9 | 27 |
1 files changed, 18 insertions, 9 deletions
diff --git a/share/man/man9/bus_dma.9 b/share/man/man9/bus_dma.9 index b081cf4..b2ab769 100644 --- a/share/man/man9/bus_dma.9 +++ b/share/man/man9/bus_dma.9 @@ -283,7 +283,7 @@ Client specified lock/mutex manipulation method. This will be called from within busdma whenever a client lock needs to be manipulated. In its current form, the function will be called immediately before -the callback for a dma load operation that has been deferred with +the callback for a DMA load operation that has been deferred with .Dv BUS_DMA_LOCK and immediately after with .Dv BUS_DMA_UNLOCK . @@ -364,17 +364,26 @@ indicates that there are no boundary restrictions. Bounds of the window of bus address space that .Em cannot be directly accessed by the device. -The window contains all addresses greater than lowaddr and -less than or equal to highaddr. -For example, a device incapable of DMA above 4GB, would specify -a highaddr of +The window contains all addresses greater than +.Fa lowaddr +and less than or equal to +.Fa highaddr . +For example, a device incapable of DMA above 4GB, would specify a +.Fa highaddr +of .Dv BUS_SPACE_MAXADDR -and a lowaddr of +and a +.Fa lowaddr +of .Dv BUS_SPACE_MAXADDR_32BIT . -Similarly a device that can only dma to addresses bellow 16MB would -specify a highaddr of +Similarly a device that can only perform DMA to addresses below +16MB would specify a +.Fa highaddr +of .Dv BUS_SPACE_MAXADDR -and a lowaddr of +and a +.Fa lowaddr +of .Dv BUS_SPACE_MAXADDR_24BIT . Some implementations requires that some region of device visible address space, overlapping available host memory, be outside the |