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Re: running purely uncached ..

To: ashish anand <>
Subject: Re: running purely uncached ..
From: Ralf Baechle <>
Date: Thu, 1 May 2003 21:26:25 +0200
In-reply-to: <>; from on Thu, May 01, 2003 at 02:32:41PM -0000
Original-recipient: rfc822;
References: <>
User-agent: Mutt/
On Thu, May 01, 2003 at 02:32:41PM -0000, ashish  anand wrote:

> in my kernel source tree i observed in arch/mips/mm/r4xx0.c though
> there are other support routines for flush , invalidate and maintain
> the cache consistency ..but there is no mention of running purely 
> uncached using the old style code CONFIG_MIPS_UNCACHED or otherwise.

CONFIG_MIPS_UNCACHED still exists but it's only selectable when SMP
support is disabled.

Usual warning applies - running uncached is not well supported and is
extremly slow.  It is mostly intended for hardware people who need to
observe all actions of the processor externally.


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