L2 Cache enable on i.MX5

[Robert Daniels]

​I recently discovered an issue with an i.MX53 based product where we had an older version of Das U-Boot which disabled the L2 cache on startup but in a later version would re-enable it once the L2 cache was configured. Since we had the version that did not re-enable it, we run our Linux kernel with the L2 cache disabled.

I'd like to have the Linux kernel enable the L2 cache on initialization - where is the correct place to do this? Currently, I've added it to the initialization assembly in arch/arm/boot/compressed/head.S for the decompress kernel loader to get the cache enabled as soon as possible but I wonder if there's a better place.

Once I get things squared away, I can submit this patch to the list to have it added to the kernel.

Thanks,

Robert Daniels



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