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50 lines
1.7 KiB
C
50 lines
1.7 KiB
C
/** @file
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Copyright (c) 2017-2021, Arm Limited. All rights reserved.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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System Control and Management Interface V1.0
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http://infocenter.arm.com/help/topic/com.arm.doc.den0056a/
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DEN0056A_System_Control_and_Management_Interface.pdf
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**/
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#ifndef ARM_SCMI_PERFORMANCE_PROTOCOL_PRIVATE_H_
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#define ARM_SCMI_PERFORMANCE_PROTOCOL_PRIVATE_H_
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#include <Protocol/ArmScmiPerformanceProtocol.h>
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// Number of performance levels returned by a call to the SCP, Lvls Bits[11:0]
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#define NUM_PERF_LEVELS_MASK 0x0FFF
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#define NUM_PERF_LEVELS(Lvls) (Lvls & NUM_PERF_LEVELS_MASK)
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// Number of performance levels remaining after a call to the SCP, Lvls Bits[31:16]
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#define NUM_REMAIN_PERF_LEVELS_SHIFT 16
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#define NUM_REMAIN_PERF_LEVELS(Lvls) (Lvls >> NUM_REMAIN_PERF_LEVELS_SHIFT)
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/** Return values for ScmiMessageIdPerformanceDescribeLevels command.
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SCMI Spec section 4.5.2.5
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**/
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typedef struct {
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UINT32 NumLevels;
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// NOTE: Since EDK2 does not allow flexible array member [] we declare
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// here array of 1 element length. However below is used as a variable
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// length array.
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SCMI_PERFORMANCE_LEVEL PerfLevel[1]; // Offset to array of performance levels
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} PERF_DESCRIBE_LEVELS;
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/** Initialize performance management protocol and install on a given Handle.
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@param[in] Handle Handle to install performance management
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protocol.
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@retval EFI_SUCCESS Performance protocol installed successfully.
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**/
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EFI_STATUS
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ScmiPerformanceProtocolInit (
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IN EFI_HANDLE *Handle
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);
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#endif /* ARM_SCMI_PERFORMANCE_PROTOCOL_PRIVATE_H_ */
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