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Re: Linux on LSI EZ4102

Subject: Re: Linux on LSI EZ4102
From: Quinn Jensen <jensenq@Lineo.COM>
Date: Wed, 18 Apr 2001 10:24:02 -0600
Organization: Lineo, Inc.
References: <15062.17293.403963.722517@valen.metzler>
User-agent: Mozilla/5.0 (X11; U; Linux 2.2.16-9mdk i686; en-US; m18) Gecko/20010131 Netscape6/6.01
Are the caches two-way (or more)?  If so, check
to see if the way select bit(s) are contiguous
with the offset for indexed cache operations.
If there is a hole, you have to flush in two
parts, or flush as if the cache was big enough
to span the hole.

Quinn wrote:


does anybody have experience with the LSI EZ41XX line of MIPS cores
and Linux, especially regarding the cache handling?
They have a R3000-like MMU architecture and most of the MIPS2 command
set but a totally different cache.
Without cache enabled the Linux port I did works fine but with cache
the ethernet driver and the MMU behave badly. I thought I implemented
the flushing routines correctly but it seems I missed something.
If somebody already did work on this architecture please let me know.



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