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Re: need help on unaligned loads,stores!

To: "Liu Hongming (Alan)" <alanliu@trident.com.cn>, linux-mips@linux-mips.org
Subject: Re: need help on unaligned loads,stores!
From: Thomas Horsten <thomas@horsten.com>
Date: Mon, 13 Oct 2003 19:27:07 +0100
In-reply-to: <15F9E1AE3207D6119CEA00D0B7DD5F6801AC0B85@TMTMS>
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References: <15F9E1AE3207D6119CEA00D0B7DD5F6801AC0B85@TMTMS>
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On Monday 13 October 2003 02:44, Liu Hongming (Alan) wrote:

> I am porting linux for a cpu that doesnt support unaligned loads/stores
> instructions.
>
> when using memcpy in arch/mips/memcpy.S,it will not work on these
> instructions.
>
> Any one could help me to deal with this? Have you ever ported linux for
> this kind cpu?
>
> And anyone could tell me which cpu doesnt support these instructions
> either,and has
>
> been ported for linux?

Almost all MIPS CPU's are like this, and don't support unaligned accesses.

The memcpy in arch/mips/lib/memcpy.S already handles this (by copying the end 
and beginning using byte-accesses if not aligned).

Best regards,

Thomas


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