soc/intel/common: Add SMM common code for Intel Platforms

SMI code is very similar across Intel platforms. Move this code to
common/block/smi to allow it to be shared between platforms instead
of duplicating the code for each platform. smihandler.h has already
been made common so all it will contain is name changes and a move
to the common block location. Due to moving smihandler code, APL
changes are bundled here to show this change.

Change-Id: I599358f23d5de7564ef1ca414bccd54cebab5a4c
Signed-off-by: Brandon Breitenstein <brandon.breitenstein@intel.com>
Reviewed-on: https://review.coreboot.org/19392
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

1 files changed, 34 insertions, 0 deletions

diff --git a/src/soc/intel/common/block/include/intelblocks/smm.h b/src/soc/intel/common/block/include/intelblocks/smm.h
new file mode 100644
index 0000000000..09378b9463
--- /dev/null
+++ b/src/soc/intel/common/block/include/intelblocks/smm.h
@@ -0,0 +1,34 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 201 Intel Corp.
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ */
+
+#ifndef SOC_INTEL_COMMON_BLOCK_SMM_H
+#define SOC_INTEL_COMMON_BLOCK_SMM_H
+
+/*
+ * This common code block relies on each specific SOC defining the macro
+ * ENABLE_SMI_PARAMS for the values needed for SMI enabling on the
+ * specific SOC
+ */
+
+/*
+ * The initialization of the southbridge is split into 2 compoments. One is
+ * for clearing the state in the SMM registers. The other is for enabling
+ * SMIs.
+ */
+void smm_southbridge_clear_state(void);
+void smm_southbridge_enable(void);
+
+#endif