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25da6e3113
Booting using "Direct Kernel Boot" for PolarFire SoC & skipping u-boot entirely is probably not advisable, but it does at least show signs of life. Recent Linux kernel versions make use of peripherals that are missing definitions in QEMU and lead to kernel panics. These issues almost certain rear their head for other methods of booting, but I was unable to figure out a suitable HSS version that is recent enough to support these peripherals & works with QEMU. With these peripherals added, booting a kernel with the following hangs hangs waiting for the system controller's hwrng, but the kernel no longer panics. With the Linux driver for hwrng disabled, it boots to console. qemu-system-riscv64 -M microchip-icicle-kit \ -m 2G -smp 5 \ -kernel $(vmlinux_bin) \ -dtb $(dtb)\ -initrd $(initramfs) \ -display none -serial null \ -serial stdio More peripherals are added than strictly required to fix the panics in the hopes of avoiding a replication of this problem in the future. Some of the peripherals which are in the device tree for recent kernels are implemented in the FPGA fabric. The eMMC/SD mux, which exists as an unimplemented device is replaced by a wider entry. This updated entry covers both the mux & the remainder of the FPGA fabric connected to the MSS using Fabric Interrconnect (FIC) 3. Link: https://github.com/polarfire-soc/icicle-kit-reference-design#fabric-memory-map Link: https://ww1.microchip.com/downloads/aemDocuments/documents/FPGA/ProductDocuments/SupportingCollateral/V1_4_Register_Map.zip Signed-off-by: Conor Dooley <conor.dooley@microchip.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-Id: <20220813135127.2971754-1-mail@conchuod.ie> Signed-off-by: Alistair Francis <alistair.francis@wdc.com> |
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