mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-04 01:49:36 +00:00
![Tobias Klauser](/assets/img/avatar_default.png)
Enable generic earlycon support for nios2. This e.g. allows to use a 8250/16650 UART as earlycon. In order to get the earlycon, we just need to call parse_early_param() in early_init_devtree() as soon as the device tree is initially scanned. By adding an stdout-path property to the dts (done in this patch for 10m50_devboard), the earlycon can be used. In order to provide early printk support, we need to provide a dummy implementation of early_console_write(), so that arch/nios2/kernel/early_printk.c can still be compiled if neither SERIAL_ALTERA_JTAGUART_CONSOLE nor SERIAL_ALTERA_UART_CONSOLE is selected. As soon as the altera_uart and altera_jtaguart support earlycon, the entire file can be removed. Tested-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Acked-by: Ley Foon Tan <ley.foon.tan@intel.com>
27 lines
741 B
Text
27 lines
741 B
Text
menu "Kernel hacking"
|
|
|
|
config TRACE_IRQFLAGS_SUPPORT
|
|
def_bool y
|
|
|
|
source "lib/Kconfig.debug"
|
|
|
|
config DEBUG_STACK_USAGE
|
|
bool "Enable stack utilization instrumentation"
|
|
depends on DEBUG_KERNEL
|
|
help
|
|
Enables the display of the minimum amount of free stack which each
|
|
task has ever had available in the sysrq-T and sysrq-P debug output.
|
|
|
|
This option will slow down process creation somewhat.
|
|
|
|
config EARLY_PRINTK
|
|
bool "Activate early kernel debugging"
|
|
default y
|
|
select SERIAL_CORE_CONSOLE
|
|
help
|
|
Enable early printk on console
|
|
This is useful for kernel debugging when your machine crashes very
|
|
early before the console code is initialized.
|
|
You should normally say N here, unless you want to debug such a crash.
|
|
|
|
endmenu
|