MdePkg/Library/DxeIoLibCpuIo2/DxeCpuIo2LibInternal.h

   1 /** @file
   2   Internal include file of DXE CPU IO2 Library.
   3
   4   Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>
   5   This program and the accompanying materials are licensed and made available
   6   under the terms and conditions of the BSD License which accompanies this
   7   distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php.
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #ifndef _DXE_CPUIO2_LIB_INTERNAL_H_
  16 #define _DXE_CPUIO2_LIB_INTERNAL_H_
  17
  18 #include <PiDxe.h>
  19
  20 #include <Protocol/CpuIo2.h>
  21
  22 #include <Library/IoLib.h>
  23 #include <Library/UefiBootServicesTableLib.h>
  24 #include <Library/DebugLib.h>
  25 #include <Library/BaseLib.h>
  26
  27
  28 /**
  29   Reads registers in the EFI CPU I/O space.
  30
  31   Reads the I/O port specified by Port with registers width specified by Width.
  32   The read value is returned. If such operations are not supported, then ASSERT().
  33   This function must guarantee that all I/O read and write operations are serialized.
  34
  35   @param  Port          The base address of the I/O operation.
  36                         The caller is responsible for aligning the Address if required.
  37   @param  Width         The width of the I/O operation.
  38
  39   @return Data read from registers in the EFI CPU I/O space.
  40
  41 **/
  42 UINT64
  43 EFIAPI
  44 IoReadWorker (
  45   IN      UINTN                     Port,
  46   IN      EFI_CPU_IO_PROTOCOL_WIDTH Width
  47   );
  48
  49 /**
  50   Writes registers in the EFI CPU I/O space.
  51
  52   Writes the I/O port specified by Port with registers width and value specified by Width
  53   and Data respectively.  Data is returned. If such operations are not supported, then ASSERT().
  54   This function must guarantee that all I/O read and write operations are serialized.
  55
  56   @param  Port          The base address of the I/O operation.
  57                         The caller is responsible for aligning the Address if required.
  58   @param  Width         The width of the I/O operation.
  59   @param  Data          The value to write to the I/O port.
  60
  61   @return The paramter of Data.
  62
  63 **/
  64 UINT64
  65 EFIAPI
  66 IoWriteWorker (
  67   IN      UINTN                     Port,
  68   IN      EFI_CPU_IO_PROTOCOL_WIDTH Width,
  69   IN      UINT64                    Data
  70   );
  71
  72 /**
  73   Reads memory-mapped registers in the EFI system memory space.
  74
  75   Reads the MMIO registers specified by Address with registers width specified by Width.
  76   The read value is returned. If such operations are not supported, then ASSERT().
  77   This function must guarantee that all MMIO read and write operations are serialized.
  78
  79   @param  Address       The MMIO register to read.
  80                         The caller is responsible for aligning the Address if required.
  81   @param  Width         The width of the I/O operation.
  82
  83   @return Data read from registers in the EFI system memory space.
  84
  85 **/
  86 UINT64
  87 EFIAPI
  88 MmioReadWorker (
  89   IN      UINTN                     Address,
  90   IN      EFI_CPU_IO_PROTOCOL_WIDTH Width
  91   );
  92
  93 /**
  94   Writes memory-mapped registers in the EFI system memory space.
  95
  96   Writes the MMIO registers specified by Address with registers width and value specified by Width
  97   and Data respectively. Data is returned. If such operations are not supported, then ASSERT().
  98   This function must guarantee that all MMIO read and write operations are serialized.
  99
 100   @param  Address       The MMIO register to read.
 101                         The caller is responsible for aligning the Address if required.
 102   @param  Width         The width of the I/O operation.
 103   @param  Data          The value to write to the I/O port.
 104
 105   @return Data read from registers in the EFI system memory space.
 106
 107 **/
 108 UINT64
 109 EFIAPI
 110 MmioWriteWorker (
 111   IN      UINTN                     Address,
 112   IN      EFI_CPU_IO_PROTOCOL_WIDTH Width,
 113   IN      UINT64                    Data
 114   );
 115
 116 #endif