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Re: kexec on mips - anyone has it working?

To: Tomasz Chmielewski <>
Subject: Re: kexec on mips - anyone has it working?
From: Simon Horman <>
Date: Wed, 28 May 2008 09:31:49 +1000
Cc: Nicolas Schichan <>,, Kexec Mailing List <>
In-reply-to: <>
Original-recipient: rfc822;
References: <> <> <> <> <>
User-agent: Mutt/1.5.17+20080114 (2008-01-14)
On Tue, May 27, 2008 at 08:14:11PM +0200, Tomasz Chmielewski wrote:
> Nicolas Schichan schrieb:
> > On Tuesday 27 May 2008 14:40:21 you wrote:
> >>> Could you try to add the following line in machine_kexec.c, just before
> >>> jumping to the trampoline:
> >>>
> >>>        change_c0_config(CONF_CM_CMASK, CONF_CM_UNCACHED);
> >> And machine_kexec.c file is in where? It's not in the above one, it's
> >> not in kexec-tools-testing-20080324?
> > 
> > 
> > machine_kexec.c is in the kernel not in the kexec userland tools.
> Aah, I see.
> Anyway, it doesn't work - with or without this slight change in 
> machine_kexec.c, with kexec compiled from the sources in the link you 
> gave or with kexec-tools-testing-20080324, it just doesn't work on 
> BCM43XX with OpenWRT patches. At least on Asus WL-500gP.


MIPS support was merged into kexec-tools-testing-20080324.
However, as far as I could tell it only supports one of the
many boot protocols that are used by various MIPS machines.

If things aren't working for a particular peice of hardware, I would
start by looking into what boot protocol the kernel uses on that
machine, and making sure that kexec-tools understands it.

As always if there are any patches for MIPS for kexec-tools, please send
them to me and this list.


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