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Re: How to configure the cache size in r4000

To: karthikeyan natarajan <>
Subject: Re: How to configure the cache size in r4000
From: "Maciej W. Rozycki" <>
Date: Mon, 12 Jan 2004 13:51:55 +0100 (CET)
In-reply-to: <>
Organization: Technical University of Gdansk
Original-recipient: rfc822;
References: <>
On Sun, 11 Jan 2004, [iso-8859-1] karthikeyan natarajan wrote:

>     The cache size is modified by setting the IC/DC
> bits in the 'config' register. Seems they are set only
> by the hardware during the processor reset. And also,
> those bits are mentioned as read only bits..

 You cannot modify the size of the primary caches -- the values are
hardwired to the amount of cache available in the processor (8kB+8kB for
the original R4000).  However, if you take appropriate precautions, you
can alter the line sizes of the caches by modifying appropriate bits of

+  Maciej W. Rozycki, Technical University of Gdansk, Poland   +
+        e-mail:, PGP key available        +

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