Linux Headquarters
[ Register ]
[ About us ] [ Home Page ]

[ Kernel ] [ Documentation ] [ Links ] [ Books ]

Advertisement

Kernel v2.6.25-git2 /Documentation/debugging-via-ohci1394.txt

Filename:/Documentation/debugging-via-ohci1394.txt
Lines Added:10
Lines Deleted:6
Also changed in: (Previous) 2.6.25-git1  2.6.25  2.6.25-rc9  2.6.25-rc8  2.6.25-rc7  2.6.25-rc6 
(Following) 2.6.25-git3  2.6.25-git4  2.6.25-git5  2.6.25-git6  2.6.25-git7  2.6.25-git8 

Location
[  2.6.25-git2
  [  Documentation
     o  debugging-via-ohci1394.txt

Patch

diff --git a/Documentation/debugging-via-ohci1394.txt b/Documentation/debugging-via-ohci1394.txt
index c360d4e..59a91e5 100644
--- a/Documentation/debugging-via-ohci1394.txt
+++ b/Documentation/debugging-via-ohci1394.txt
@@ -41,15 +41,19 @@ to a working state and enables physical DMA by default for all remote nodes.
 This can be turned off by ohci1394's module parameter phys_dma=0.
 
 The alternative firewire-ohci driver in drivers/firewire uses filtered physical
-DMA, hence is not yet suitable for remote debugging.
+DMA by default, which is more secure but not suitable for remote debugging.
+Compile the driver with CONFIG_FIREWIRE_OHCI_REMOTE_DMA (Kernel hacking menu:
+Remote debugging over FireWire with firewire-ohci) to get unfiltered physical
+DMA.
 
-Because ohci1394 depends on the PCI enumeration to be completed, an
-initialization routine which runs pretty early (long before console_init()
-which makes the printk buffer appear on the console can be called) was written.
+Because ohci1394 and firewire-ohci depend on the PCI enumeration to be
+completed, an initialization routine which runs pretty early has been
+implemented for x86.  This routine runs long before console_init() can be
+called, i.e. before the printk buffer appears on the console.
 
 To activate it, enable CONFIG_PROVIDE_OHCI1394_DMA_INIT (Kernel hacking menu:
-Provide code for enabling DMA over FireWire early on boot) and pass the
-parameter "ohci1394_dma=early" to the recompiled kernel on boot.
+Remote debugging over FireWire early on boot) and pass the parameter
+"ohci1394_dma=early" to the recompiled kernel on boot.
 
 Tools
 -----


Comments: webmaster (at) linuxhq.com.
Advertising: banners (at) linuxhq.com.
Compilation ©1998-2008 Linux Headquarters, Inc.