Re: [PATCH] powerpc 8xx: Loading kernels over 8Mbytes withoutCONFIG_PIN_TLB

[Scott Wood]

On Wed, 2013-11-27 at 12:04 +0100, Christophe Leroy wrote:
> Today, the only way to load kernels whose size is greater than 8Mbytes is to
> activate CONFIG_PIN_TLB. Otherwise, the physical memory initially mapped is
> limited to 8Mbytes. This patch sets up 24 Mbytes of initial memory regardless
> of whether CONFIG_PIN_TLB is active or not. It allows to load "big" kernels
> (for instance when activating CONFIG_LOCKDEP_SUPPORT) without having
> to activate CONFIG_PIN_TLB.

So, what happens on boards with less than 24M memory present?  Even if
you avoid explicitly referencing those addresses, what if there is a
speculative access -- or does 8xx not do that?

-Scott



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