IntelFrameworkPkg/Library/DxeIoLibCpuIo/DxeCpuIoLibInternal.h

   1 /** @file
   2   Internal include file of DXE CPU IO Library.
   3   It includes all necessary protocol/library class's header file
   4   for implementation of IoLib library instance. It is included
   5   all source code of this library instance.
   6
   7   Copyright (c) 2006, Intel Corporation
   8   All rights reserved. This program and the accompanying materials
   9   are licensed and made available under the terms and conditions of the BSD License
  10   which accompanies this distribution.  The full text of the license may be found at
  11   http://opensource.org/licenses/bsd-license.php
  12
  13   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  14   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  15
  16   Module Name:  DxeCpuIoLibInternal.h
  17
  18 **/
  19
  20 #ifndef _DXE_CPUIO_LIB_INTERNAL_H_
  21 #define _DXE_CPUIO_LIB_INTERNAL_H_
  22
  23
  24 #include <FrameworkDxe.h>
  25
  26
  27 #include <Protocol/CpuIo.h>
  28 #include <Protocol/PciRootBridgeIo.h>
  29
  30
  31 #include <Library/IoLib.h>
  32 #include <Library/UefiBootServicesTableLib.h>
  33 #include <Library/DebugLib.h>
  34 #include <Library/BaseLib.h>
  35
  36
  37 /**
  38   Reads registers in the EFI CPU I/O space.
  39
  40   Reads the I/O port specified by Port with registers width specified by Width.
  41   The read value is returned. If such operations are not supported, then ASSERT().
  42   This function must guarantee that all I/O read and write operations are serialized.
  43
  44   @param  Port          The base address of the I/O operation.
  45                         The caller is responsible for aligning the Address if required.
  46   @param  Width         The width of the I/O operation.
  47
  48   @return Data read from registers in the EFI CPU I/O space.
  49
  50 **/
  51 UINT64
  52 EFIAPI
  53 IoReadWorker (
  54   IN      UINTN                     Port,
  55   IN      EFI_CPU_IO_PROTOCOL_WIDTH Width
  56   );
  57
  58 /**
  59   Writes registers in the EFI CPU I/O space.
  60
  61   Writes the I/O port specified by Port with registers width and value specified by Width
  62   and Data respectively.  Data is returned. If such operations are not supported, then ASSERT().
  63   This function must guarantee that all I/O read and write operations are serialized.
  64
  65   @param  Port          The base address of the I/O operation.
  66                         The caller is responsible for aligning the Address if required.
  67   @param  Width         The width of the I/O operation.
  68   @param  Data          The value to write to the I/O port.
  69
  70   @return The paramter of Data.
  71
  72 **/
  73 UINT64
  74 EFIAPI
  75 IoWriteWorker (
  76   IN      UINTN                     Port,
  77   IN      EFI_CPU_IO_PROTOCOL_WIDTH Width,
  78   IN      UINT64                    Data
  79   );
  80
  81 /**
  82   Reads memory-mapped registers in the EFI system memory space.
  83
  84   Reads the MMIO registers specified by Address with registers width specified by Width.
  85   The read value is returned. If such operations are not supported, then ASSERT().
  86   This function must guarantee that all MMIO read and write operations are serialized.
  87
  88   @param  Address       The MMIO register to read.
  89                         The caller is responsible for aligning the Address if required.
  90   @param  Width         The width of the I/O operation.
  91
  92   @return Data read from registers in the EFI system memory space.
  93
  94 **/
  95 UINT64
  96 EFIAPI
  97 MmioReadWorker (
  98   IN      UINTN                     Address,
  99   IN      EFI_CPU_IO_PROTOCOL_WIDTH Width
 100   );
 101
 102 /**
 103   Writes memory-mapped registers in the EFI system memory space.
 104
 105   Writes the MMIO registers specified by Address with registers width and value specified by Width
 106   and Data respectively. Data is returned. If such operations are not supported, then ASSERT().
 107   This function must guarantee that all MMIO read and write operations are serialized.
 108
 109   @param  Address       The MMIO register to read.
 110                         The caller is responsible for aligning the Address if required.
 111   @param  Width         The width of the I/O operation.
 112   @param  Data          The value to write to the I/O port.
 113
 114   @return Data read from registers in the EFI system memory space.
 115
 116 **/
 117 UINT64
 118 EFIAPI
 119 MmioWriteWorker (
 120   IN      UINTN                     Address,
 121   IN      EFI_CPU_IO_PROTOCOL_WIDTH Width,
 122   IN      UINT64                    Data
 123   );
 124
 125 #endif