From 7913ad1ad83409e7f9ed5758bb4324bf64c95a73 Mon Sep 17 00:00:00 2001 From: Finn Thain Date: Sat, 12 Apr 2014 23:48:56 +1000 Subject: 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 Tested-by: Stephen N Chivers [Geert: CONSOLE_DEBUG should depend on CONFIG_FONT_SUPPORT] Reported-by: kbuild test robot Signed-off-by: Geert Uytterhoeven --- arch/m68k/Kconfig.debug | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) (limited to 'arch/m68k/Kconfig.debug') diff --git a/arch/m68k/Kconfig.debug b/arch/m68k/Kconfig.debug index 229682721240..64776d7ac199 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 -- cgit