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smp: fix IRQs on secondary CPUs

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Seems one of the registers is some kind of system-level CPU spinup flag,
without which the CPU runs but the rest of the system thinks it's still
dead.

Signed-off-by: Hector Martin <marcan@marcan.st>
This commit is contained in:
Hector Martin 2021-02-03 19:18:57 +09:00
parent cb7e7f7918
commit e35ef6eb8c
1 changed files with 5 additions and 0 deletions
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5
src/smp.c
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@ -68,6 +68,11 @@ static void smp_start_cpu(int index, int cluster, int core, u64 rvbar, u64 cpu_s
write64(rvbar, (u64)_vectors_start); write64(rvbar, (u64)_vectors_start);
// Some kind of system level startup/status bit
// Without this, IRQs don't work
write32(cpu_start_base + 0x4, 1 << index);
// Actually start the core
if (cluster == 0) { if (cluster == 0) {
write32(cpu_start_base + 0x8, 1 << core); write32(cpu_start_base + 0x8, 1 << core);
} else { } else {