3 files changed, 42 insertions, 0 deletions
diff --git a/src/mainboard/google/myst/Makefile.inc b/src/mainboard/google/myst/Makefile.inc
index 54d4f30d57..9a8f8d8918 100644
--- a/src/mainboard/google/myst/Makefile.inc
+++ b/src/mainboard/google/myst/Makefile.inc
@@ -9,6 +9,8 @@ ramstage-y += mainboard.c
 ramstage-y += port_descriptors.c
 ramstage-$(CONFIG_CHROMEOS) += chromeos.c
 
+verstage-$(CONFIG_VBOOT_STARTS_BEFORE_BOOTBLOCK) += verstage.c
+
 subdirs-y += variants/baseboard
 subdirs-y += variants/$(VARIANT_DIR)
 
diff --git a/src/mainboard/google/myst/variants/baseboard/Makefile.inc b/src/mainboard/google/myst/variants/baseboard/Makefile.inc
index 3ef89cac66..74839fa863 100644
--- a/src/mainboard/google/myst/variants/baseboard/Makefile.inc
+++ b/src/mainboard/google/myst/variants/baseboard/Makefile.inc
@@ -8,5 +8,6 @@ romstage-y += gpio.c
 romstage-y += tpm_tis.c
 
 verstage-y += tpm_tis.c
+verstage-$(CONFIG_VBOOT_STARTS_BEFORE_BOOTBLOCK) += gpio.c
 
 smm-y += smihandler.c
diff --git a/src/mainboard/google/myst/verstage.c b/src/mainboard/google/myst/verstage.c
new file mode 100644
index 0000000000..2320106214
--- /dev/null
+++ b/src/mainboard/google/myst/verstage.c
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <amdblocks/acpimmio.h>
+#include <arch/io.h>
+#include <baseboard/variants.h>
+#include <gpio.h>
+#include <psp_verstage.h>
+#include <security/vboot/vboot_common.h>
+#include <soc/espi.h>
+#include <soc/southbridge.h>
+
+void verstage_mainboard_early_init(void)
+{
+	const struct soc_amd_gpio *gpios;
+	size_t num_gpios;
+
+	variant_early_gpio_table(&gpios, &num_gpios);
+	gpio_configure_pads(gpios, num_gpios);
+}
+
+void verstage_mainboard_espi_init(void)
+{
+	const struct soc_amd_gpio *gpios;
+	size_t num_gpios;
+
+	variant_espi_gpio_table(&gpios, &num_gpios);
+	gpio_configure_pads(gpios, num_gpios);
+
+	espi_switch_to_spi1_pads();
+}
+
+void verstage_mainboard_tpm_init(void)
+{
+	const struct soc_amd_gpio *gpios;
+	size_t num_gpios;
+
+	variant_tpm_gpio_table(&gpios, &num_gpios);
+	gpio_configure_pads(gpios, num_gpios);
+}