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Date: Fri, 28 Sep 2001 10:51:54 -0700
From: Jun Sun <jsun@mvista.com>
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To: Mike Manchip <michael.manchip@s3group.com>
CC: linux-mips <linux-mips@oss.sgi.com>
Subject: Re: having trouble installing exceptions
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Mike Manchip wrote:
> 
> Hi all
> 
> I'm currently trying to get the mips port to work on a galileo gt64115 board
> with a rm5231 chip.
> 
> I'm OK right until the point when I'm installing exceptions into
> non-cacheable space in arch/mips/kernel/traps.c
> 
What do you mean by "non-cachable space"?  KSEG0 is cacheable by default.

> as soon as I memcpy except_vec3_generic to KSEG0 + 0x180 and flush the
> instruction cache, my machine hangs, and I can't see why!
>

Most likely it hangs in flush_icache_range().  Put some printk there.

Jun