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Re: [PATCH 3/16] Kconfig update for lemote fulong mini-PC

To: Ralf Baechle <ralf@linux-mips.org>
Subject: Re: [PATCH 3/16] Kconfig update for lemote fulong mini-PC
From: Fuxin Zhang <fxzhang@ict.ac.cn>
Date: Wed, 18 Apr 2007 21:32:18 +0800
Cc: tiansm@lemote.com, linux-mips@linux-mips.org, Fuxin Zhang <zhangfx@lemote.com>
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+

Is there anything in implementation of this option Loongson2-specific?
Yes. Most 64bit MIPS processors cannot access 64bit content of registers when it is in 32bit mode.

Loongson2 has no 32/64 mode bit in fact.

And the usage arise from Loongson2's multimedia extension, which is also uniq.
If not then I suggest we make this option loook like:

   bool "Save 64bit integer registers" if CPU_SUPPORTS_64BIT_KERNEL && 32BIT

Somebody else might have a use for it!

  Ralf





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