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Re: [PATCH] Enable AT_PLATFORM for Loongson 2F CPU

To: David Daney <>
Subject: Re: [PATCH] Enable AT_PLATFORM for Loongson 2F CPU
From: Robert Millan <>
Date: Tue, 9 Nov 2010 00:02:39 +0100
Cc: Aurelien Jarno <>, Ralf Baechle <>,
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2010/11/8 David Daney <>:
> Look at the description of the register in this document:
> On page 49, it says that bits 0-3 contain the minor version number and bits
> 4-7 are the major version number (according to a workmate that reads
> Chinese).
> I don't know for certain, but it seems plausible that the 2E and 2F will
> differ in bits 4-7, and bits 0-3 can be ignored.

Thanks for investigating, but ignoring bits 0-3 doesn't
really change anything.  Our problem was that bits 0-7
are the same on 2E and 2F (0x02).  If we ignore bits 0-3,
then our problem is that bits 4-7 are the same on 2E
and 2F (0x2).

Robert Millan

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