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From:	Arnaud Patard <apatard@mandriva.com>
To:	wuzhangjin@gmail.com
Cc:	linux-mips@linux-mips.org, ralf@linux-mips.org,
	Wu Zhangjin <wuzj@lemote.com>, Yan Hua <yanh@lemote.com>,
	Philippe Vachon <philippe@cowpig.ca>,
	Zhang Le <r0bertz@gentoo.org>,
	Zhang Fuxin <zhangfx@lemote.com>,
	loongson-dev <loongson-dev@googlegroups.com>,
	Liu Junliang <liujl@lemote.com>,
	Erwan Lerale <erwan@thiscow.com>
Subject: Re: [loongson-PATCH-v3 17/25] add a machtype kernel command line argument
References: <cover.1244120575.git.wuzj@lemote.com>
	<d1f4caa360114f843459dc71827b1175232a24be.1244120575.git.wuzj@lemote.com>
Organization: Mandriva
Date:	Thu, 04 Jun 2009 15:51:18 +0200
In-Reply-To: <d1f4caa360114f843459dc71827b1175232a24be.1244120575.git.wuzj@lemote.com> (wuzhangjin@gmail.com's message of "Thu,  4 Jun 2009 21:08:03 +0800")
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wuzhangjin@gmail.com writes:

Hi,

> From: Wu Zhangjin <wuzj@lemote.com>
>
> the difference between yeeloong-7inch and yeeloong-8.9inch is very
> small, only including the screen size and shutdown logic. so, it's very
> important to share the same kernel image file between them instead of
> adding some new kernel config options. benefit from this, the
> distribution developers only have a need to compile the kernel one time.
>
> to share the same kernel image file between yeelooong-7inch and
> yeeloong-8.9inch, there is a need to add a kernel command line, here I
> name is machtype, it works like this:
>
> 	machtype=lemote-yeeloong-2f-7inch
> 	      company - product - cpu revision - size

I'm curious. Why can't you use the boot monitor to pass the right
machine type instead ? iirc, you're using pmon and pmon has a variable
called "systype". If the systype variable is not designed for that, I'll
be happy to know its use :)


Arnaud