From: leo.yan@linaro.org (Leo Yan)
To: linux-arm-kernel@lists.infradead.org
Subject: Debug UART for arm64 ?
Date: Sat, 26 Sep 2015 15:02:16 +0800 [thread overview]
Message-ID: <20150926070216.GA14835@leoy-linaro> (raw)
In-Reply-To: <CAK7LNAQcBeQfRFf25HYOnN60rnb4uU=d=Ogas+-b1TCRMAxMJA@mail.gmail.com>
Hi,
On Sat, Sep 26, 2015 at 03:24:35PM +0900, Masahiro Yamada wrote:
> Forgive me if I am asking a silly question.
>
>
> I will have to port ARM64 Linux on our new SoC.
> This is my first work on ARM64 Linux,
> so I have no experience with it yet.
>
> When I worked on ARM32 Linux porting for the first time,
> lowlevel-debug UART (CONFIG_DEBUG_LL) was very useful for me.
>
> With my quick search under arch/arm64/ directory,
> I could not find an equivalent one for ARM64.
>
>
> Is debug UART available for ARM64?
> Or, is there any other recommended easy-to-use debug facility
> when something like a JTAG-debugger is unavailable.
drivers/tty/serial/earlycon.c is like what you are looking for.
Thanks,
Leo Yan
next prev parent reply other threads:[~2015-09-26 7:02 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-26 6:24 Debug UART for arm64 ? Masahiro Yamada
2015-09-26 7:02 ` Leo Yan [this message]
2015-09-27 7:49 ` Masahiro Yamada
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