ACPI: Add framework for GNVS initialisation

Provide common initialisation point for setting up
GNVS structure before first SMI is triggered.

Change-Id: Iccad533c3824d70f6cbae52cc8dd79f142ece944
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42423
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 18 insertions, 0 deletions

diff --git a/src/acpi/chromeos-gnvs.c b/src/acpi/chromeos-gnvs.c
new file mode 100644
index 0000000000..d30e204463
--- /dev/null
+++ b/src/acpi/chromeos-gnvs.c
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <acpi/acpi_gnvs.h>
+#include <types.h>
+#include <ec/google/chromeec/ec.h>
+#include <vendorcode/google/chromeos/gnvs.h>
+
+void gnvs_assign_chromeos(void)
+{
+	chromeos_acpi_t *gnvs_chromeos = gnvs_chromeos_ptr();
+	chromeos_init_chromeos_acpi(gnvs_chromeos);
+
+	/* EC can override to ECFW_RW. */
+	gnvs_chromeos->vbt2 = ACTIVE_ECFW_RO;
+
+	if (CONFIG(EC_GOOGLE_CHROMEEC) && !google_ec_running_ro())
+		gnvs_chromeos->vbt2 = ACTIVE_ECFW_RW;
+}