On Tue, 17 Jan 2023 at 15:54, Jonas Karlman jonas@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@kwiboo.se
arch/arm/dts/rockchip-u-boot.dtsi | 1 + 1 file changed, 1 insertion(+)
Reviewed-by: Simon Glass sjg@chromium.org