From 07ac84eaaa5daeae4a56ff70649a3e50fc470db5 Mon Sep 17 00:00:00 2001
From: Bin Meng <bmeng.cn@gmail.com>
Date: Sat, 7 May 2016 07:46:13 -0700
Subject: [PATCH] x86: irq: Reserve IRQ9 for ACPI in PIC mode
Reserve IRQ9 which is to be used as SCI interrupt number
for ACPI in PIC mode.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Tested-by: Stefan Roese <sr@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
---
arch/x86/cpu/irq.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/x86/cpu/irq.c b/arch/x86/cpu/irq.c
index 2950783055e..7586fc2b0cc 100644
--- a/arch/x86/cpu/irq.c
+++ b/arch/x86/cpu/irq.c
@@ -121,6 +121,11 @@ static int create_pirq_routing_table(struct udevice *dev)
priv->irq_mask = fdtdec_get_int(blob, node,
"intel,pirq-mask", PIRQ_BITMAP);
+ if (IS_ENABLED(CONFIG_GENERATE_ACPI_TABLE)) {
+ /* Reserve IRQ9 for SCI */
+ priv->irq_mask &= ~(1 << 9);
+ }
+
if (priv->config == PIRQ_VIA_IBASE) {
int ibase_off;
--
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