[U-Boot] ZynqMP multiple cores loading kernel in EL1

[Kevin Peeters]

Dear U-boot mailing list,

We are currently trying to boot a linux kernel on a custom Zynq Ultrascale+ based board. Our goal is to run a 32-bit linux kernel on the 64-bit FPGA. In order to do this, we want to boot all (4) the CPU's in Exception Level 1 (EL1). We already found a flag called CONFIG_ARMV8_SWITCH_TO_EL1 in include/configs/xilinx_zynqmp.h (which is normally commented out). When we enable this flag, it successfully switches one CPU (the one running U-boot) to EL1, but it leaves the others untouched. Is there anything else we need to set so all of the CPU's will switch to EL1?

Met vriendelijke groet / Kind regards,

Kevin Peeters
Designer

[Prodrive B.V.]<http://www.prodrive-technologies.com/>
Mobile

+31 62 57 28 374

Phone

+31 40 26 76 200

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Science Park Eindhoven 5501


5692 EM SON, The Netherlands


www.prodrive-technologies.com<http://www.prodrive-technologies.com>

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