Re: [U-Boot] [PATCH 0/4] Introduce low-level debug for ARM architecture

On 08/16/2014 11:16 PM, Masahiro Yamada wrote:

I have been in trouble for a while to debug some nasty problem where neighter a debugger nor printf() function is available.

I found the lowlevel debug feature in ARM Linux can be used as is in U-Boot too.

I tested this series on our SoCs (32bit ARM, specificly Coretex-A9). Because I was not sure about aarch64, I have this feature depend on "! ARM64".

1/4 and 2/4 refactor a bit and move CONFIG_ARM64 to Kconfig.

3/4 imports some source files from Linux 3.16 and 4/4 adds the Kconfig menu.

Dear Masahiro,

How do you use this debug facility? Do you print to memory?

I don't know enough to comment on the patch. I don't see CP15 co-process in the SoC I am debugging.

York