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Change-Id: I0b49ff8b6275fdde326c79ec21c34faa03094f9e
Signed-off-by: Elyes Haouas <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83160
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
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Trying to probe RAM space to figure out top of memory causes an
exception on RISC-V virtual machines with recent versions of QEMU, but
we temporarily enable exception handlers for that and use it to help
detect if a RAM address is usable or not. However, QEMU docs recommend
reading device information from the device-tree blob it provides us at
the start of RAM.
A previous commit adds a library function to parse device-tree blob that
QEMU provides us. Use it to determine top of memory in RISC-V QEMU
virtual machines, but still fall back to the RAM probing approach as a
last-ditch effort.
Change-Id: I9e4a95f49ad373675939329eef40d7423a4132ab
Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80363
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Maximilian Brune <maximilian.brune@9elements.com>
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Change-Id: Ib1a8fc50217c84e835080c70269ff50fc001392c
Signed-off-by: Elyes Haouas <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/81811
Reviewed-by: Varshit Pandya <pandyavarshit@gmail.com>
Reviewed-by: Jonathon Hall <jonathon.hall@puri.sm>
Reviewed-by: Yidi Lin <yidilin@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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This changes the virt target so that it can be run with the -bios option
and a pflash backend for the flash. QEMU can now be run as follows:
qemu -M virt -m 1G -nographic -bios build/coreboot.rom \
-drive if=pflash,file=./build/coreboot.rom,format=raw
coreboot will start in DRAM, but still have a flash to put CBFS onto and
to load subsequent stages and payload from.
Tested bootflow:
coreboot -> OpenSBI -> Linux -> u-root
Signed-off-by: Maximilian Brune <maximilian.brune@9elements.com>
Change-Id: I009d97fa3e13068b91c604e987e50a65e525407d
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80746
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: ron minnich <rminnich@gmail.com>
Reviewed-by: Philipp Hug <philipp@hug.cx>
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