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Re: [Q] enabling FPU for vpe1

To: "Kevin D. Kissell" <kevink@paralogos.com>
Subject: Re: [Q] enabling FPU for vpe1
From: Deng-Cheng Zhu <dengcheng.zhu@gmail.com>
Date: Wed, 4 Aug 2010 18:14:27 +0800
Cc: linux-mips@linux-mips.org
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Thanks for looking into this.

I did do that. But the CU1 bit of TC#1 (in VPE#1) can not be set by
TC#0 or itself. Looks like VPE#1 is not seeing the FPU at all...


Deng-Cheng


2010/8/4 Kevin D. Kissell <kevink@paralogos.com>:
> Check the MIPS MT spec.  If I recall correctly, it's possible to enable
> access to the FPU by either VPE by setting the right bits while the
> processor is in the MT configuration mode.
>
> Deng-Cheng Zhu wrote:
>> Hi,
>>
>>
>> I'm working on a 34Kf CPU. I understand that only one TC can use the
>> FPU at any given time.
>>
>> My question is: If a TC is attached to the 2nd VPE (i.e. VPE1), can I
>> enable FPU for it?
>>
>> I experimented on this, but failed to do it. Am I missing something?
>>
>>
>> Thanks
>>
>> Deng-Cheng
>>
>>
>
>

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