1 files changed, 49 insertions, 0 deletions
diff --git a/roms/edk2/ArmPkg/Drivers/ArmScmiDxe/ArmScmiPerformanceProtocolPrivate.h b/roms/edk2/ArmPkg/Drivers/ArmScmiDxe/ArmScmiPerformanceProtocolPrivate.h
new file mode 100644
index 000000000..b274b5ab2
--- /dev/null
+++ b/roms/edk2/ArmPkg/Drivers/ArmScmiDxe/ArmScmiPerformanceProtocolPrivate.h
@@ -0,0 +1,49 @@
+/** @file
+
+  Copyright (c) 2017-2018, Arm Limited. All rights reserved.
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+  System Control and Management Interface V1.0
+    http://infocenter.arm.com/help/topic/com.arm.doc.den0056a/
+    DEN0056A_System_Control_and_Management_Interface.pdf
+**/
+
+#ifndef ARM_SCMI_PERFORMANCE_PROTOCOL_PRIVATE_H_
+#define ARM_SCMI_PERFORMANCE_PROTOCOL_PRIVATE_H_
+
+#include <Protocol/ArmScmiPerformanceProtocol.h>
+
+// Number of performance levels returned by a call to the SCP, Lvls Bits[11:0]
+#define NUM_PERF_LEVELS_MASK          0x0FFF
+#define NUM_PERF_LEVELS(Lvls) (Lvls & NUM_PERF_LEVELS_MASK)
+
+// Number of performance levels remaining after a call to the SCP, Lvls Bits[31:16]
+#define NUM_REMAIN_PERF_LEVELS_SHIFT  16
+#define NUM_REMAIN_PERF_LEVELS(Lvls) (Lvls >> NUM_REMAIN_PERF_LEVELS_SHIFT)
+
+/** Return values for SCMI_MESSAGE_ID_PERFORMANCE_DESCRIBE_LEVELS command.
+  SCMI Spec section 4.5.2.5
+**/
+typedef struct {
+  UINT32 NumLevels;
+
+  // NOTE: Since EDK2 does not allow flexible array member [] we declare
+  // here array of 1 element length. However below is used as a variable
+  // length array.
+  SCMI_PERFORMANCE_LEVEL PerfLevel[1]; // Offset to array of performance levels
+} PERF_DESCRIBE_LEVELS;
+
+/** Initialize performance management protocol and install on a given Handle.
+
+  @param[in] Handle              Handle to install performance management
+                                 protocol.
+
+  @retval EFI_SUCCESS            Performance protocol installed successfully.
+**/
+EFI_STATUS
+ScmiPerformanceProtocolInit (
+  IN EFI_HANDLE* Handle
+  );
+
+#endif /* ARM_SCMI_PERFORMANCE_PROTOCOL_PRIVATE_H_ */