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List:       uclinux-dev
Subject:    Re: [uClinux-dev] machine_arch_type in head-nommu.S?
From:       Greg Ungerer <gerg () snapgear ! com>
Date:       2007-01-29 6:36:18
Message-ID: 45BD95E2.5010705 () snapgear ! com
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Hi Brandon,

Brandon Fosdick wrote:
> The kernel file arch/arm/kernel/head-nommu.S calls 
> __lookup_machine_type, which requires r1 to be set to MACH_TYPE_XXXX. 
> The current version of the file just uses MACH_TYPE_ARMEL, but it really 
> should be a bit more intelligent. It already includes asm/mach-types.h, 
> which #define's machine_arch_type, but for some reason machine_arch_type 
> isn't actually set to a valid type.
> 
> Anybody know how this is supposed to be done?

I recall hacking that in to get the ARMulator working again.

The way this is normally handled on ARM platforms where bootloaders
don't pass in the machine number is to have a code shim that is
prepended to the kernel. And it puts the machine number into r1
and then jumps into the kernel.

Regards
Greg



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Greg Ungerer  --  Chief Software Dude       EMAIL:     gerg@snapgear.com
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