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arch/riscv/boot.c: Comment OpenSBI Supervisor mode switch

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It simply adds a comment to indicate to the reader that the
RISCV_PAYLOAD_MODE_S parameter causes OpenSBI to switch to Supervisor
mode. Otherwise it could be interpreted that coreboot switches to
Supervisor mode before starting OpenSBI (which is not the case)

Signed-off-by: Maximilian Brune <maximilian.brune@9elements.com>
Change-Id: Ib62be0c2ff59361200df4c65f9aca5f7456a0ada
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79949
Reviewed-by: ron minnich <rminnich@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Philipp Hug <philipp@hug.cx>
This commit is contained in:
Maximilian Brune 2024-01-14 09:24:43 +06:00 committed by Lean Sheng Tan
parent 0452d0939e
commit 2d26e9bdce
1 changed files with 4 additions and 2 deletions
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6
src/arch/riscv/boot.c
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@ -31,10 +31,12 @@ static void do_arch_prog_run(struct arch_prog_run_args *args)
fdt = prog_entry_arg(prog);
if (ENV_RAMSTAGE && prog_type(prog) == PROG_PAYLOAD) {
if (CONFIG(RISCV_OPENSBI))
if (CONFIG(RISCV_OPENSBI)) {
// tell OpenSBI to switch to Supervisor mode before jumping to payload
run_payload_opensbi(prog, fdt, args->opensbi, RISCV_PAYLOAD_MODE_S);
else
} else {
run_payload(prog, fdt, RISCV_PAYLOAD_MODE_S);
}
} else {
void (*doit)(int hart_id, void *fdt, void *arg) = prog_entry(prog);
doit(hart_id, fdt, prog_entry_arg(prog));