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>
diff --git a/arch/x86/cpu/irq.c b/arch/x86/cpu/irq.c
index 295078305..7586fc2 100644
--- a/arch/x86/cpu/irq.c
+++ b/arch/x86/cpu/irq.c
@@ -121,6 +121,11 @@
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;