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85 lines
2.5 KiB
C
85 lines
2.5 KiB
C
/** @file
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Copyright (c) 2017-2018, 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_CLOCK_PROTOCOL_PRIVATE_H_
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#define ARM_SCMI_CLOCK_PROTOCOL_PRIVATE_H_
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#pragma pack(1)
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// Clock rate in two 32bit words.
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typedef struct {
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UINT32 Low;
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UINT32 High;
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} CLOCK_RATE_DWORD;
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// Format of the returned rate array. Linear or Non-linear,.RatesFlag Bit[12]
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#define RATE_FORMAT_SHIFT 12
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#define RATE_FORMAT_MASK 0x0001
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#define RATE_FORMAT(RatesFlags) ((RatesFlags >> RATE_FORMAT_SHIFT) \
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& RATE_FORMAT_MASK)
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// Number of remaining rates after a call to the SCP, RatesFlag Bits[31:16]
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#define NUM_REMAIN_RATES_SHIFT 16
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#define NUM_REMAIN_RATES(RatesFlags) ((RatesFlags >> NUM_REMAIN_RATES_SHIFT))
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// Number of rates that are returned by a call.to the SCP, RatesFlag Bits[11:0]
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#define NUM_RATES_MASK 0x0FFF
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#define NUM_RATES(RatesFlags) (RatesFlags & NUM_RATES_MASK)
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// Return values for the CLOCK_DESCRIBER_RATE command.
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typedef struct {
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UINT32 NumRatesFlags;
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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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CLOCK_RATE_DWORD Rates[1];
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} CLOCK_DESCRIBE_RATES;
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#define CLOCK_SET_DEFAULT_FLAGS 0
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// Message parameters for CLOCK_RATE_SET command.
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typedef struct {
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UINT32 Flags;
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UINT32 ClockId;
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CLOCK_RATE_DWORD Rate;
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} CLOCK_RATE_SET_ATTRIBUTES;
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// Message parameters for CLOCK_CONFIG_SET command.
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typedef struct {
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UINT32 ClockId;
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UINT32 Attributes;
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} CLOCK_CONFIG_SET_ATTRIBUTES;
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// if ClockAttr Bit[0] is set then clock device is enabled.
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#define CLOCK_ENABLE_MASK 0x1
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#define CLOCK_ENABLED(ClockAttr) ((ClockAttr & CLOCK_ENABLE_MASK) == 1)
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typedef struct {
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UINT32 Attributes;
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UINT8 ClockName[SCMI_MAX_STR_LEN];
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} CLOCK_ATTRIBUTES;
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#pragma pack()
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/** Initialize clock management protocol and install protocol on a given handle.
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@param[in] Handle Handle to install clock management protocol.
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@retval EFI_SUCCESS Clock protocol interface installed successfully.
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**/
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EFI_STATUS
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ScmiClockProtocolInit (
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IN EFI_HANDLE *Handle
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);
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#endif /* ARM_SCMI_CLOCK_PROTOCOL_PRIVATE_H_ */
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