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load image into cache and execute it in cache

Note: This was originally posted on 31st January 2013 at http://forums.arm.com

Hi Experts:

    i have heard that some ARM platform providers load their bootloader into L2 cache, and execute the bootloader in L2 cache directly.

    how can this work? do they add some logic inside silicon to make this work?

    as my understanding, cache has differnt architecture from normal sram, how can CPU recognize the L2 cache as a normal sram and execute image in it directly?

Best Regards

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Peter Harris over 12 years ago

Note: This was originally posted on 1st February 2013 at http://forums.arm.com

You can play some tricks using cache lockdown of some ways in the L2 cache, but it is increasingly an option not implemented in newer Cortex-A profile cores so not always available.

Cortex-R profile cores tend to have better alternatives available - such as TCM.
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Peter Harris over 12 years ago

Note: This was originally posted on 1st February 2013 at http://forums.arm.com

You can play some tricks using cache lockdown of some ways in the L2 cache, but it is increasingly an option not implemented in newer Cortex-A profile cores so not always available.

Cortex-R profile cores tend to have better alternatives available - such as TCM.
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