1 files changed, 21 insertions, 0 deletions
diff --git a/src/mainboard/protectli/vault_bsw/mainboard.c b/src/mainboard/protectli/vault_bsw/mainboard.c
new file mode 100644
index 0000000000..1fd891918b
--- /dev/null
+++ b/src/mainboard/protectli/vault_bsw/mainboard.c
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* This file is part of the coreboot project. */
+
+#include <arch/mmio.h>
+#include <device/device.h>
+#include <soc/iomap.h>
+
+#define BIOS_CONTROL_REG	0xFC
+#define   BIOS_CONTROL_WPD	(1 << 0)
+
+static void mainboard_enable(struct device *dev)
+{
+	volatile void *addr = (void *)(SPI_BASE_ADDRESS + BIOS_CONTROL_REG);
+
+	/* Set Bios Write Protect Disable bit to allow saving MRC cache */
+	write8(addr, read8(addr) | BIOS_CONTROL_WPD);
+}
+
+struct chip_operations mainboard_ops = {
+	.enable_dev = mainboard_enable,
+};