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diff --git a/src/vendorcode/amd/cimx/rd890/amdSbLib.h b/src/vendorcode/amd/cimx/rd890/amdSbLib.h
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+++ b/src/vendorcode/amd/cimx/rd890/amdSbLib.h
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+/**
+ * @file
+ *
+ * SB common library
+ *
+ *
+ *
+ * @xrefitem bom "File Content Label" "Release Content"
+ * @e project: Common Library
+ * @e sub-project:
+ * @e \$Revision:$ @e \$Date:$
+ *
+ */
+/*****************************************************************************
+ *
+ * Copyright (C) 2012 Advanced Micro Devices, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of Advanced Micro Devices, Inc. nor the names of
+ * its contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL ADVANCED MICRO DEVICES, INC. BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ ***************************************************************************/
+
+#ifndef _AMDSBLIB_H_
+#define _AMDSBLIB_H_
+
+VOID
+LibAmdSbStall (
+ IN UINT32 uSec,
+ IN VOID *ConfigPtr
+ );
+
+VOID
+LibAmdSbPmioRead (
+ IN UINT8 Address,
+ IN ACCESS_WIDTH Width,
+ OUT VOID *Value,
+ IN VOID *ConfigPtr
+ );
+
+VOID
+LibAmdSbPmioWrite (
+ IN UINT8 Address,
+ IN ACCESS_WIDTH Width,
+ IN VOID *Value,
+ IN VOID *ConfigPtr
+ );
+
+#define SB_SB800 0x02
+#define SB_SB700 0x01
+#define SB_UNKNOWN 0xFF
+#define SB_REV_UNKNOWN 0xFF
+
+/// Southbridge info
+typedef struct {
+ UINT8 Type; ///< SB Model (SB800/SB700/...)
+ UINT8 Revision; ///< SB Revision ID
+} SB_INFO;
+
+SB_INFO
+LibAmdSbGetRevisionInfo (
+ IN VOID *ConfigPtr
+ );
+
+#endif