IntelFrameworkPkg/Library/DxeIoLibCpuIo/DxeCpuIoLibInternal.h

   1 /** @file
   2   Internal include file of DXE CPU IO Library.
   3
   4   Copyright (c) 2006, Intel Corporation
   5   All rights reserved. This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this 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   Module Name:  DxeCpuIoLibInternal.h
  14
  15 **/
  16
  17 #ifndef _DXE_CPUIO_LIB_INTERNAL_H_
  18 #define _DXE_CPUIO_LIB_INTERNAL_H_
  19
  20
  21 #include <FrameworkDxe.h>
  22
  23
  24 #include <Protocol/CpuIo.h>
  25 #include <Protocol/PciRootBridgeIo.h>
  26
  27
  28 #include <Library/IoLib.h>
  29 #include <Library/UefiBootServicesTableLib.h>
  30 #include <Library/DebugLib.h>
  31 #include <Library/BaseLib.h>
  32
  33
  34 /**
  35   Reads registers in the EFI CPU I/O space.
  36
  37   Reads the I/O port specified by Port with registers width specified by Width.
  38   The read value is returned. If such operations are not supported, then ASSERT().
  39   This function must guarantee that all I/O read and write operations are serialized.
  40
  41   @param  Port          The base address of the I/O operation.
  42                         The caller is responsible for aligning the Address if required.
  43   @param  Width         The width of the I/O operation.
  44
  45   @return Data read from registers in the EFI CPU I/O space.
  46
  47 **/
  48 UINT64
  49 EFIAPI
  50 IoReadWorker (
  51   IN      UINTN                     Port,
  52   IN      EFI_CPU_IO_PROTOCOL_WIDTH Width
  53   );
  54
  55 /**
  56   Writes registers in the EFI CPU I/O space.
  57
  58   Writes the I/O port specified by Port with registers width and value specified by Width
  59   and Data respectively.  Data is returned. If such operations are not supported, then ASSERT().
  60   This function must guarantee that all I/O read and write operations are serialized.
  61
  62   @param  Port          The base address of the I/O operation.
  63                         The caller is responsible for aligning the Address if required.
  64   @param  Width         The width of the I/O operation.
  65   @param  Data          The value to write to the I/O port.
  66
  67   @return The paramter of Data.
  68
  69 **/
  70 UINT64
  71 EFIAPI
  72 IoWriteWorker (
  73   IN      UINTN                     Port,
  74   IN      EFI_CPU_IO_PROTOCOL_WIDTH Width,
  75   IN      UINT64                    Data
  76   );
  77
  78 /**
  79   Reads memory-mapped registers in the EFI system memory space.
  80
  81   Reads the MMIO registers specified by Address with registers width specified by Width.
  82   The read value is returned. If such operations are not supported, then ASSERT().
  83   This function must guarantee that all MMIO read and write operations are serialized.
  84
  85   @param  Address       The MMIO register to read.
  86                         The caller is responsible for aligning the Address if required.
  87   @param  Width         The width of the I/O operation.
  88
  89   @return Data read from registers in the EFI system memory space.
  90
  91 **/
  92 UINT64
  93 EFIAPI
  94 MmioReadWorker (
  95   IN      UINTN                     Address,
  96   IN      EFI_CPU_IO_PROTOCOL_WIDTH Width
  97   );
  98
  99 /**
 100   Writes memory-mapped registers in the EFI system memory space.
 101
 102   Writes the MMIO registers specified by Address with registers width and value specified by Width
 103   and Data respectively. Data is returned. If such operations are not supported, then ASSERT().
 104   This function must guarantee that all MMIO read and write operations are serialized.
 105
 106   @param  Address       The MMIO register to read.
 107                         The caller is responsible for aligning the Address if required.
 108   @param  Width         The width of the I/O operation.
 109
 110   @return Data read from registers in the EFI system memory space.
 111
 112 **/
 113 UINT64
 114 EFIAPI
 115 MmioWriteWorker (
 116   IN      UINTN                     Address,
 117   IN      EFI_CPU_IO_PROTOCOL_WIDTH Width,
 118   IN      UINT64                    Data
 119   );
 120
 121 #endif