mirror of https://github.com/acidanthera/audk.git
65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
/*++
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Copyright (c) 2004 - 2014, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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Module Name:
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LegacyMetronome.h
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Abstract:
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Driver implementing the EFI 2.0 metronome protocol using the legacy PORT 61
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timer.
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--*/
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#ifndef _LEGACY_METRONOME_H
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#define _LEGACY_METRONOME_H
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//
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// Statements that include other files
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//
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#include "Protocol/Metronome.h"
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#include "Protocol/CpuIo.h"
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#include "Library/DebugLib.h"
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#include "Library/UefiBootServicesTableLib.h"
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//
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// Private definitions
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//
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#define TICK_PERIOD 300
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#define REFRESH_PORT 0x61
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#define REFRESH_ON 0x10
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#define REFRESH_OFF 0x00
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#define TIMER1_CONTROL_PORT 0x43
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#define TIMER1_COUNT_PORT 0x41
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#define LOAD_COUNTER1_LSB 0x54
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#define COUNTER1_COUNT 0x12
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//
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// Function Prototypes
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//
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/**
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Waits for the TickNumber of ticks from a known platform time source.
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@param This Pointer to the protocol instance.
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@param TickNumber Tick Number to be waited
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@retval EFI_SUCCESS If number of ticks occurred.
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@retval EFI_NOT_FOUND Could not locate CPU IO protocol
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**/
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EFI_STATUS
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EFIAPI
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WaitForTick (
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IN EFI_METRONOME_ARCH_PROTOCOL *This,
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IN UINT32 TickNumber
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);
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#endif
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