[U-Boot] [U-Boot,v2] spl: implement CRC check on U-Boot uImage

[Tom Rini]

On Wed, Nov 28, 2018 at 09:52:45PM +0100, Simon Goldschmidt wrote:

> SPL currently does not check uImage CRCs when loading U-Boot.
> 
> This patch adds checking the uImage CRC when SPL loads U-Boot. It does
> this by reusing the existing config option SPL_CRC32_SUPPORT to allow
> leaving out the CRC check on boards where the additional code size or
> boot time is a problem (adding the CRC check currently adds ~1.4 kByte
> to flash).
> 
> The SPL_CRC32_SUPPORT config option now gets enabled by default if SPL
> support for legacy images is enabled to check the CRC on all boards
> that don't actively take countermeasures.
> 
> Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt at gmail.com>
> Reviewed-by: Simon Glass <sjg at chromium.org>

Really sorry for the delay on this, especially as I've found one or two
problems.  The first problem is that with this vyasa-rk3288 and a few
others fail to build due to a number of errors such as:
../common/spl/spl.c:269:12: error: 'struct spl_image_info' has no member
named 'dcrc_data'

Second, I believe this is causing a number of platforms with very tight
SPL constraints, namely all of 64bit sunxi, to fail to link as they
overflow SRAM now.  This can be fixed at least by making the new
behavior opt-in, but I would fix the vyasa-rk3288 problem first.  Thanks
in advance!

-- 
Tom
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