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authorJason Wessel <jason.wessel@windriver.com>2010-05-20 22:04:24 -0400
committerJason Wessel <jason.wessel@windriver.com>2010-05-20 22:04:24 -0400
commitada64e4c98eb5f04a9ca223c5ff9e7ac22ce6404 (patch)
tree48e284cf69157cf54302dcceb01ad7a07b889206 /Documentation/kernel-parameters.txt
parenta0de055cf61338549b13079a5677ef2e1b6472ef (diff)
kgdboc,keyboard: Keyboard driver for kdb with kgdb
This patch adds in the kdb PS/2 keyboard driver. This was mostly a direct port from the original kdb where I cleaned up the code against checkpatch.pl and added the glue to stitch it into kgdb. This patch also enables early kdb debug via kgdbwait and the keyboard. All the access to configure kdb using either a serial console or the keyboard is done via kgdboc. If you want to use only the keyboard and want to break in early you would add to your kernel command arguments: kgdboc=kbd kgdbwait If you wanted serial and or the keyboard access you could use: kgdboc=kbd,ttyS0 You can also configure kgdboc as a kernel module or at run time with the sysfs where you can activate and deactivate kgdb. Turn it on: echo kbd,ttyS0 > /sys/module/kgdboc/parameters/kgdboc Turn it off: echo "" > /sys/module/kgdboc/parameters/kgdboc Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'Documentation/kernel-parameters.txt')
-rw-r--r--Documentation/kernel-parameters.txt8
1 files changed, 5 insertions, 3 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index b12bacd252fc..3845e3a84a52 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1121,9 +1121,11 @@ and is between 256 and 4096 characters. It is defined in the file
1121 zone if it does not. 1121 zone if it does not.
1122 1122
1123 kgdboc= [HW] kgdb over consoles. 1123 kgdboc= [HW] kgdb over consoles.
1124 Requires a tty driver that supports console polling. 1124 Requires a tty driver that supports console polling,
1125 (only serial supported for now) 1125 or a supported polling keyboard driver (non-usb).
1126 Format: <serial_device>[,baud] 1126 Serial only format: <serial_device>[,baud]
1127 keyboard only format: kbd
1128 keyboard and serial format: kbd,<serial_device>[,baud]
1127 1129
1128 kmac= [MIPS] korina ethernet MAC address. 1130 kmac= [MIPS] korina ethernet MAC address.
1129 Configure the RouterBoard 532 series on-chip 1131 Configure the RouterBoard 532 series on-chip