8260 + L2 Cache

Hello all, a few questions if I may..

We have a custom board with an MPC8260 and 1MB of L2 cache. The cache is controlled (flushed, invalidated, inhibited, and locked) by 4 signals which are tied to GPIOs on the 8260. We are booting with PPCBoot 1.1.2 and are using version 2.4.17 of the Linux kernel.

At boot time the L2 inhibit signal is asserted and remains so until we toggle a bit in the Port D register. Doing so manually results in Linux crashing (no big surprise). So the question is:
where in Linux should we be enabling the cache? At the same time the L1 cache is enabled? Or should it be done before Linux boots? I would think it should be done in Linux since that is where the data cache is turned on, but I could be wrong.

Any help is greatly appreciated.

Thanks!
Kevin Fry

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Hi,

I have a Motorola MPC8260ADS Board with a CopRaven JTag cable. I would like to load PPC Boot on our flash board but I can't find the process to achieve that.

Has anybody already done this and could give a desciption of how to do this.

Thanks in advance,
Bruno Coudoin.

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