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Zero PLIC threshold value at startup

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The PLIC threshold value must be zeroed at startup to permit
all interrupt priorities. Fixes #1128.
This commit is contained in:
Yannis Huber
2020-06-07 11:23:14 +02:00
committed by Ron Evans
parent c5a896771d
commit d61d5d7ab1
1 changed files with 3 additions and 0 deletions
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src/runtime/runtime_fe310.go
+3
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@@ -24,6 +24,9 @@ func main() {
sifive.PLIC.ENABLE[0].Set(0)
sifive.PLIC.ENABLE[1].Set(0)
// Zero the threshold value to allow all priorities of interrupts.
sifive.PLIC.THRESHOLD.Set(0)
// Set the interrupt address.
// Note that this address must be aligned specially, otherwise the MODE bits
// of MTVEC won't be zero.