arm64/imx9: add imx93-evk ddr training #14787
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This performs the DDR training for imx93-evk. In addition to the source code, it downloads binaries which are included in the final image. The bootloader must be ARCH_CORTEX_A53 instead of A55 due to atomic instructions that don't work with the OCRAM / EL3 combination. Signed-off-by: Eero Nurkkala <[email protected]>
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This performs the DDR training for imx93-evk. In addition to the source code, it downloads binaries which are included in the final image. The bootloader must be ARCH_CORTEX_A53 instead of A55 due to atomic instructions that don't work with the OCRAM / EL3 combination.
Summary
This add DDR training so that the system may use the external DDR memory.
Impact
All imx93 bootloaders will now also initialize the DDR memory present.
Testing
imx93-evk with SD-card boot (bootloader on SD-card), with NSH used for simple manual tests; mw command enabled for direct memory access.