From: Christoph Hellwig <hch@lst.de>
To: Palmer Dabbelt <palmer@sifive.com>
Cc: Nick Kossifidis <mick@ics.forth.gr>,
Atish Patra <atish.patra@wdc.com>,
linux-riscv@lists.infradead.org
Subject: [PATCH 05/11] riscv: clear all pending interrupts when booting
Date: Mon, 15 Apr 2019 11:14:36 +0200 [thread overview]
Message-ID: <20190415091442.19945-6-hch@lst.de> (raw)
In-Reply-To: <20190415091442.19945-1-hch@lst.de>
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>
---
arch/riscv/kernel/head.S | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/riscv/kernel/head.S b/arch/riscv/kernel/head.S
index fe884cd69abd..9e3840d84d3e 100644
--- a/arch/riscv/kernel/head.S
+++ b/arch/riscv/kernel/head.S
@@ -22,8 +22,9 @@
__INIT
ENTRY(_start)
- /* Mask all interrupts */
+ /* Mask and clear all interrupts */
csrw sie, zero
+ csrw sip, zero
/* Load the global pointer */
.option push
--
2.20.1
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next prev parent reply other threads:[~2019-04-15 9:15 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-15 9:14 misc cleanups v3 Christoph Hellwig
2019-04-15 9:14 ` [PATCH 01/11] riscv: use asm-generic/extable.h Christoph Hellwig
2019-04-15 9:14 ` [PATCH 02/11] riscv: turn mm_segment_t into a struct Christoph Hellwig
2019-04-15 9:14 ` [PATCH 03/11] riscv: remove unreachable big endian code Christoph Hellwig
2019-04-15 9:14 ` [PATCH 04/11] riscv: remove CONFIG_RISCV_ISA_A Christoph Hellwig
2019-04-15 9:14 ` Christoph Hellwig [this message]
2019-04-15 9:14 ` [PATCH 06/11] riscv: simplify the stack pointer setup in head.S Christoph Hellwig
2019-04-15 9:14 ` [PATCH 07/11] riscv: cleanup the parse_dtb calling conventions Christoph Hellwig
2019-04-15 9:14 ` [PATCH 08/11] riscv: remove unreachable !HAVE_FUNCTION_GRAPH_RET_ADDR_PTR code Christoph Hellwig
2019-04-15 9:14 ` [PATCH 09/11] riscv: remove duplicate macros from ptrace.h Christoph Hellwig
2019-04-15 9:14 ` [PATCH 10/11] riscv: print the unexpected interrupt cause Christoph Hellwig
2019-04-15 9:14 ` [PATCH 11/11] riscv: call pm_power_off from machine_halt / machine_power_off Christoph Hellwig
2019-04-23 8:23 ` misc cleanups v3 Christoph Hellwig
2019-04-25 21:58 ` Palmer Dabbelt
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