From: Niklaus Giger <Niklaus.Giger@netstal.com>
To: u-boot@lists.denx.de
Subject: [U-Boot-Users] icache/dcache not working on PPC440
Date: Fri, 2 Mar 2007 16:51:53 +0100 [thread overview]
Message-ID: <es9h6q$2gp$1@sea.gmane.org> (raw)
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
next reply other threads:[~2007-03-02 15:51 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-02 15:51 Niklaus Giger [this message]
2007-03-02 16:49 ` [U-Boot-Users] icache/dcache not working on PPC440 Stefan Roese
2007-03-02 16:54 ` Wolfgang Denk
2007-03-02 17:51 ` Stefan Roese
2007-03-04 21:33 ` [U-Boot-Users] Understanding imw & inm Charles Krinke
2007-03-02 16:50 ` [U-Boot-Users] icache/dcache not working on PPC440 Wolfgang Denk
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