RE: [linuxsh-dev] SH7751R

[Bowers, A. <ant...@su...>]

> -----Original Message-----
> From: Matan Ziv-Av [mailto:ma...@sv...]
>
> For controlling the caches you need to implement functions to
> purge or flush parts of the caches, and those are different=20
> when the cache is larger and is associative (in the file=20
> arch/sh/mm/cache-sh4.c, and the .S files in that directory).

Attached is a patch against kernel 2.4.17-st1.0 that contains the =
necessary changes to arch/sh/mm/cache-sh4.c for the associative cache =
mode on the SH7751R. It introduces a new cpu subtype, =
CONFIG_CPU_SUBTYPE_SH7751R, which must be selected for the associative =
cache option to be available.

The modifications were made to the 2.4.17 SH4 kernel released by ST as =
beta 1.0, and the patch was generated against this kernel version. For =
various reasons, we have not been able to get this kernel to run on =
SH7751R silicon, so it is offered as a work-in-progress in the hope that =
it will be useful. At least, it can serve as a guide to anyone making =
the same changes to a more recent kernel.

The patch also contains some irrelevant changes related to DTF. These =
should not cause any problems.

   Tony

--
Antony Bowers, SuperH (UK), Ltd.