1 files changed, 52 insertions, 0 deletions
diff --git a/src/soc/intel/skylake/lockdown.c b/src/soc/intel/skylake/lockdown.c
new file mode 100644
index 0000000000..ac138c20b3
--- /dev/null
+++ b/src/soc/intel/skylake/lockdown.c
@@ -0,0 +1,52 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2017 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <arch/io.h>
+#include <bootstate.h>
+#include <chip.h>
+#include <soc/lpc.h>
+#include <soc/pci_devs.h>
+#include <string.h>
+
+static void lpc_lockdown_config(void)
+{
+	static struct soc_intel_skylake_config *config;
+	struct device *dev;
+	uint8_t reg_mask = 0;
+
+	dev = PCH_DEV_LPC;
+	/* Check if LPC is enabled, else return */
+	if (dev == NULL || dev->chip_info == NULL)
+		return;
+
+	config = dev->chip_info;
+
+	/* Set Bios Interface Lock, Bios Lock */
+	if (config->chipset_lockdown == CHIPSET_LOCKDOWN_COREBOOT)
+		reg_mask |= LPC_BC_BILD | LPC_BC_LE;
+
+	pci_or_config8(dev, BIOS_CNTL, reg_mask);
+	/* Ensure an additional read back after performing lock down */
+	pci_read_config8(dev, BIOS_CNTL);
+}
+
+static void platform_lockdown_config(void *unused)
+{
+	/* LPC lock down configuration */
+	lpc_lockdown_config();
+}
+
+BOOT_STATE_INIT_ENTRY(BS_DEV_RESOURCES, BS_ON_EXIT, platform_lockdown_config,
+				NULL);