[PATCH 2/4] rockchip: Align FIT image data to SD/MMC block length

[Simon Glass]

On Tue, 17 Jan 2023 at 15:54, Jonas Karlman <jonas at kwiboo.se> wrote:
>
> SPL load FIT images by reading the data aligned to block length.
> Block length aligned image data is read directly to the load address.
> Unaligned image data is written to an offset of the load address and
> then the data is memcpy to the load address.
>
> This adds a small overhead of having to memcpy unaligned data, something
> that normally is not an issue.
>
> However, TF-A may have a segment that should be loaded into SRAM, e.g.
> vendor TF-A for RK3568 has a 8KiB segment that should be loaded into the
> 8KiB PMU SRAM. Having the image data for such segment unaligned result
> in segment being written to and memcpy from beyond the SRAM boundary, in
> the end this results in invalid data in SRAM.
>
> Aligning the FIT and its external data to MMC block length to work
> around such issue.
>
> Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
> ---
>  arch/arm/dts/rockchip-u-boot.dtsi | 1 +
>  1 file changed, 1 insertion(+)
>

Reviewed-by: Simon Glass <sjg at chromium.org>