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-rw-r--r--src/soc/intel/alderlake/include/soc/pmc.h3
-rw-r--r--src/soc/intel/alderlake/lockdown.c3
2 files changed, 6 insertions, 0 deletions
diff --git a/src/soc/intel/alderlake/include/soc/pmc.h b/src/soc/intel/alderlake/include/soc/pmc.h
index 52cc0b5e1c..ca11ae933a 100644
--- a/src/soc/intel/alderlake/include/soc/pmc.h
+++ b/src/soc/intel/alderlake/include/soc/pmc.h
@@ -142,6 +142,9 @@ extern struct device_operations pmc_ops;
#define ACPI_EN (1 << 7)
#define SCI_IRQ_SEL (7 << 0)
+#define ST_PG_FDIS1 0x1e20
+#define ST_FDIS_LOCK (1 << 31)
+
#define SCIS_IRQ9 0
#define SCIS_IRQ10 1
#define SCIS_IRQ11 2
diff --git a/src/soc/intel/alderlake/lockdown.c b/src/soc/intel/alderlake/lockdown.c
index b0da51ffdd..5d012d8e1b 100644
--- a/src/soc/intel/alderlake/lockdown.c
+++ b/src/soc/intel/alderlake/lockdown.c
@@ -23,6 +23,9 @@ static void pmc_lockdown_cfg(int chipset_lockdown)
if (chipset_lockdown == CHIPSET_LOCKDOWN_COREBOOT)
setbits32(pmcbase + GEN_PMCON_B, SMI_LOCK);
+
+ if (!CONFIG(USE_FSP_NOTIFY_PHASE_POST_PCI_ENUM))
+ setbits32(pmcbase + ST_PG_FDIS1, ST_FDIS_LOCK);
}
void soc_lockdown_config(int chipset_lockdown)