[U-Boot] [PATCH 3/3] arm: K3: Clean and invalidate Linux Image before jumping to Linux

Tom Rini trini at konsulko.com
Sat Oct 26 00:05:58 UTC 2019

On Mon, Oct 07, 2019 at 01:52:17PM +0530, Lokesh Vutla wrote:

> U-Boot cleans and invalidate L1 and L2 caches before jumping to Linux
> by set/way in cleanup_before_linux(). Additionally there is a custom
> hook provided to clean and invalidate L3 cache.
> Unfortunately on K3 devices(having a coherent architecture), there is no
> easy way to quickly clean all the cache lines for L3. The entire address
> range needs to be cleaned and invalidated by Virtual Address. This can
> be implemented using the L3 custom hook but it take lot of time to clean
> the entire address range. In the interest of boot time this might not be
> a viable solution.
> The best hit is to make sure the loaded Linux image is flushed so that
> the entire image is written to DDR from L3. When Linux starts running with
> caches disabled the full image is available from DDR.
> Reported-by: Andrew F. Davis <afd at ti.com>
> Reported-by: Faiz Abbas <faiz_abbas at ti.com>
> Signed-off-by: Lokesh Vutla <lokeshvutla at ti.com>

Applied to u-boot/master, thanks!

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