From mboxrd@z Thu Jan  1 00:00:00 1970
From: Niklaus Giger <Niklaus.Giger@netstal.com>
Date: Fri, 2 Mar 2007 16:51:53 +0100
Subject: [U-Boot-Users] icache/dcache not working on PPC440
Message-ID: <es9h6q$2gp$1@sea.gmane.org>
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To: u-boot@lists.denx.de

Hi

Our HW engineers discovered that the U-Boot commands icache/dcache
do not work on PPC440x boards (at least yosemite and sequoia).

In my opinion icache/dcache work only on PPC40x processors where one
can alter the ICCR/DCCR registert. For the PPC440x register one should
tinker with the corresponding SA_I bit in the TLB.

Has somebody already solved this problem and would be willing to
share his patch?

If not I am willing to work on patch along the following lines:

a) add some C-callable routines to cpu/ppc4xx/start.S to use
the TLB Search Instruction and
b) to modify/setup a TLB from C
c) add in cpu/ppc4xx/cpu.c d/icache_dis/enable procedure
Any objections/comments?

Best regards

Niklaus Giger