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authorFinn Thain <fthain@telegraphics.com.au>2014-04-12 23:48:56 +1000
committerGeert Uytterhoeven <geert@linux-m68k.org>2014-05-28 10:10:04 +0200
commit7913ad1ad83409e7f9ed5758bb4324bf64c95a73 (patch)
tree562d7acf6b0ab016a1c7ca3cbfe9cd4ed9f8f9ab /arch/m68k/Kconfig.debug
parent97f3f68c21fb5edaf4503b9aef6beefddf316d76 (diff)
downloadop-kernel-dev-7913ad1ad83409e7f9ed5758bb4324bf64c95a73.zip
op-kernel-dev-7913ad1ad83409e7f9ed5758bb4324bf64c95a73.tar.gz
m68k: Multi-platform EARLY_PRINTK
Make the boot console available to more m68k platforms by leveraging the head.S debug console. The boot console is enabled by the "earlyprintk" command line argument which is how most other architectures do this. This is a change of behaviour for the Mac but does not negatively impact the common use-case which is not debugging. This is also a change of behaviour for other platforms because it means the serial port stays quiet when CONFIG_EARLY_PRINTK is not enabled. This is also an improvement for the common use-case. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Tested-by: Stephen N Chivers <schivers@csc.com.au> [Geert: CONSOLE_DEBUG should depend on CONFIG_FONT_SUPPORT] Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'arch/m68k/Kconfig.debug')
-rw-r--r--arch/m68k/Kconfig.debug9
1 files changed, 7 insertions, 2 deletions
diff --git a/arch/m68k/Kconfig.debug b/arch/m68k/Kconfig.debug
index 2296827..64776d7 100644
--- a/arch/m68k/Kconfig.debug
+++ b/arch/m68k/Kconfig.debug
@@ -12,12 +12,17 @@ config BOOTPARAM_STRING
config EARLY_PRINTK
bool "Early printk"
- depends on MVME16x || MAC
+ depends on !(SUN3 || M68360 || M68000 || COLDFIRE)
help
Write kernel log output directly to a serial port.
+ Where implemented, output goes to the framebuffer as well.
+ PROM console functionality on Sun 3x is not affected by this option.
+
+ Pass "earlyprintk" on the kernel command line to get a
+ boot console.
This is useful for kernel debugging when your machine crashes very
- early before the console code is initialized.
+ early, i.e. before the normal console driver is loaded.
You should normally say N here, unless you want to debug such a crash.
if !MMU
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