From owner-freebsd-mips@FreeBSD.ORG  Sun Oct 23 17:10:44 2011
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Date: Sun, 23 Oct 2011 22:40:43 +0530
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From: Rohit J <mipsjunkie@gmail.com>
To: Oleksandr Tymoshenko <gonzo@bluezbox.com>
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Cc: freebsd-mips <freebsd-mips@freebsd.org>
Subject: Re: Assembler complains about use of $at after ".set noat" on sd
	instr
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Thanks a ton Juli and Oleksandr. :)
I shall try the patch and let you know how it goes.
rohit

On Sun, Oct 23, 2011 at 10:17 PM, Oleksandr Tymoshenko
<gonzo@bluezbox.com> wrote:
>
> On 2011-10-21, at 3:27 PM, Juli Mallett wrote:
>
>> On Fri, Oct 21, 2011 at 14:56, Rohit J <mipsjunkie@gmail.com> wrote:
>>> the big picture story is that
>>> as a partial fix to using octeon specific very large mult instructions
>>> in our freebsd kernel
>>> (for crypto related ops), we had initially disabled
>>> interrupts=3D>context switches
>>
>> Assuming you're using the stuff in-tree, that's my fault :)
>>
>>> Need to see if there is a better way to do it.
>>> am now trying to see if it makes sense to save those registers and
>>> remove the disable interrupt constraint for running these large multipl=
ication
>>> instructions.
>>> will be adapting the (multiplication context save/restore)
>>> in the octeon HRM and will revert if i have any further questions.
>>
>> gonzo@ has incomplete patches, you may want to ask him. =A0Alternately,
>> look at how FPU context is lazily switched on other architectures.
>>
>
> Here is the latest version of my patch:
> http://people.freebsd.org/~gonzo/patches/cop2.diff
>
> context is saved for kernel threads only, usage of crypto stuff from user=
land is not supported.