riscv: clear all pending interrupts when booting

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Just in case an old interrupt is pending make sure we clear everything
asserted before this kernel started.  Based on similar M-mode code in
opensbi.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Nick Kossifidis <mick@ics.forth.gr>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>

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Christoph Hellwig 2019-04-15 11:14:36 +02:00 • committed by Palmer Dabbelt

parent 09afac77b6

commit df16c40cbf

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arch/riscv/kernel/head.S

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