svn commit: r194009 - stable/6/share/man/man9

[Marius Strobl]

Author: marius
Date: Thu Jun 11 15:50:25 2009
New Revision: 194009
URL: http://svn.freebsd.org/changeset/base/194009

Log:
  MFC: r190283, r192026
  
  Correct the documentation of BUS_DMA_NOCACHE for amd64 and i386,
  it's a flag to bus_dmamem_alloc(9) rather than bus_dmamap_load(9)
  there.

Modified:
  stable/6/share/man/man9/   (props changed)
  stable/6/share/man/man9/bus_dma.9

Modified: stable/6/share/man/man9/bus_dma.9
==============================================================================
--- stable/6/share/man/man9/bus_dma.9	Thu Jun 11 15:49:45 2009	(r194008)
+++ stable/6/share/man/man9/bus_dma.9	Thu Jun 11 15:50:25 2009	(r194009)
@@ -60,7 +60,7 @@
 .\" $FreeBSD$
 .\" $NetBSD: bus_dma.9,v 1.25 2002/10/14 13:43:16 wiz Exp $
 .\"
-.Dd November 16, 2008
+.Dd May 12, 2009
 .Dt BUS_DMA 9
 .Os
 .Sh NAME
@@ -561,14 +561,12 @@ Are as follows:
 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
+The generated transactions to and from the virtual page are non-cacheable.
+For
+.Fn bus_dmamap_load ,
+the
 .Dv BUS_DMA_NOCACHE
-flag is currently implemented on amd64, i386 and sparc64.
+flag is currently implemented on sparc64.
 .El
 .El
 .Pp
@@ -784,6 +782,16 @@ 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.
+For
+.Fn bus_dmamem_alloc ,
+the
+.Dv BUS_DMA_NOCACHE
+flag is currently implemented on amd64 and i386 where it results in the
+Strong Uncacheable PAT to be set for the allocated virtual address range.
 .El
 .It Fa mapp
 Pointer to a