Vlv2TbltDevicePkg/Metronome/LegacyMetronome.h

   1 /*++
   2
   3   Copyright (c) 2004  - 2014, Intel Corporation. All rights reserved.<BR>
   4
   5   SPDX-License-Identifier: BSD-2-Clause-Patent
   6
   7
   8
   9 Module Name:
  10
  11   LegacyMetronome.h
  12
  13 Abstract:
  14
  15   Driver implementing the EFI 2.0 metronome protocol using the legacy PORT 61
  16   timer.
  17
  18 --*/
  19
  20 #ifndef _LEGACY_METRONOME_H
  21 #define _LEGACY_METRONOME_H
  22
  23 //
  24 // Statements that include other files
  25 //
  26 #include "Protocol/Metronome.h"
  27 #include "Protocol/CpuIo.h"
  28 #include "Library/DebugLib.h"
  29 #include "Library/UefiBootServicesTableLib.h"
  30
  31
  32 //
  33 // Private definitions
  34 //
  35 #define TICK_PERIOD         300
  36 #define REFRESH_PORT        0x61
  37 #define REFRESH_ON          0x10
  38 #define REFRESH_OFF         0x00
  39 #define TIMER1_CONTROL_PORT 0x43
  40 #define TIMER1_COUNT_PORT   0x41
  41 #define LOAD_COUNTER1_LSB   0x54
  42 #define COUNTER1_COUNT      0x12
  43
  44 //
  45 // Function Prototypes
  46 //
  47 /**
  48   Waits for the TickNumber of ticks from a known platform time source.
  49
  50   @param This                 Pointer to the protocol instance.
  51   @param TickNumber           Tick Number to be waited
  52
  53   @retval EFI_SUCCESS         If number of ticks occurred.
  54   @retval EFI_NOT_FOUND       Could not locate CPU IO protocol
  55
  56 **/
  57 EFI_STATUS
  58 EFIAPI
  59 WaitForTick (
  60   IN EFI_METRONOME_ARCH_PROTOCOL  *This,
  61   IN UINT32                       TickNumber
  62   );
  63
  64 #endif