soc/intel/common: Add support to control coreboot and Intel SoC features

The patch adds a framework to control coreboot and Intel SoC features
dynamically. BIOS reads control information from OEM Section in the
Descriptor Region and control the developer selected features.
With the feature, debug team can control the selected SoC and coreboot
features without rebuilding coreboot.

In order to enable the feature, SOC_INTEL_COMMON_BLOCK_DEBUG_FEATURE has
to be selcted from mainboard.

The OEM section starts from offset:0xf00 till end of the Descriptor
Region(0xfff).

BUG=b:153410586
BRANCH=None
TEST=Verified CSE firmware update functionality on brya

Signed-off-by: Sridhar Siricilla <sridhar.siricilla@intel.com>
Change-Id: I5ba40926bd9ad909654f152e48cdd648b28afd62
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61380
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Ronak Kanabar <ronak.kanabar@intel.com>
Reviewed-by: Maulik V Vaghela <maulik.v.vaghela@intel.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/src/soc/intel/common/basecode/include/intelbasecode/debug_feature.h b/src/soc/intel/common/basecode/include/intelbasecode/debug_feature.h
new file mode 100644
index 0000000000..fabf27ddd8
--- /dev/null
+++ b/src/soc/intel/common/basecode/include/intelbasecode/debug_feature.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef SOC_INTEL_COMMON_BASECODE_DEBUG_FEATURE_H
+#define SOC_INTEL_COMMON_BASECODE_DEBUG_FEATURE_H
+
+#include <types.h>
+
+/*
+ * Reads OEM Section area in the Descriptor Region and
+ * populates pre_mem_debug structure.
+ */
+uint8_t pre_mem_debug_init(void);
+
+#endif