linux-kernel - Re: [PATCH v2 2/9] MIPS: debug: Implement low-level debugging functions

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Date: Mon, 8 Apr 2024 08:48:14 +0200
From: Philippe Mathieu-Daudé <philmd@...aro.org>
To: Jiaxun Yang <jiaxun.yang@...goat.com>,
 Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc: linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/9] MIPS: debug: Implement low-level debugging
 functions

On 26/3/24 21:35, Jiaxun Yang wrote:
> Currently we have three sets of early debugging functions
> for MIPS: zboot putc/puts, cps-vec-ns16550, and prom_putc.
> 
> This is a attempt to bring them all to one by providing
> a interface similar to arm's debug_ll, which is very portable
> and allows you to support new platforms easily.
> 
> Two examples of output interfaces are provided, including
> 8250 uart and MIPS UHI semihosting, which already covered
> most of the platforms.
> 
> Signed-off-by: Jiaxun Yang <jiaxun.yang@...goat.com>
> ---
>   arch/mips/Kconfig.debug        |  80 +++++++++++++++++++++++++
>   arch/mips/include/debug/8250.S |  60 +++++++++++++++++++
>   arch/mips/include/debug/uhi.S  |  48 +++++++++++++++
>   arch/mips/kernel/Makefile      |   2 +
>   arch/mips/kernel/debug.S       | 130 +++++++++++++++++++++++++++++++++++++++++
>   5 files changed, 320 insertions(+)

Reviewed-by: Philippe Mathieu-Daudé <philmd@...aro.org>