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-rw-r--r--src/southbridge/amd/sb700/sm.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/src/southbridge/amd/sb700/sm.c b/src/southbridge/amd/sb700/sm.c
index 5f6d20e688..6d93b172f1 100644
--- a/src/southbridge/amd/sb700/sm.c
+++ b/src/southbridge/amd/sb700/sm.c
@@ -308,9 +308,11 @@ static void sm_init(device_t dev)
dword |= 0x1;
pci_write_config32(dev, SB_MMIO_CFG_REG, dword);
}
- //ACPI_DISABLE_TIMER_IRQ_ENHANCEMENT_FOR_8254_TIMER
byte = pci_read_config8(dev, 0xAE);
- byte |= 1 << 5;
+ if (IS_ENABLED(CONFIG_ENABLE_APIC_EXT_ID))
+ byte |= 1 << 4;
+ byte |= 1 << 5; /* ACPI_DISABLE_TIMER_IRQ_ENHANCEMENT_FOR_8254_TIMER */
+ byte |= 1 << 6; /* Enable arbiter between APIC and PIC interrupts */
pci_write_config8(dev, 0xAE, byte);
/* 4.11:Programming Cycle Delay for AB and BIF Clock Gating */