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[mirror_edk2.git] / MdePkg / Library / BaseIoLibIntrinsic / IoLibIpf.c

/** @file\r
  Common I/O Library routines.\r
\r
  Copyright (c) 2006 - 2007, Intel Corporation<BR>\r
  All rights reserved. This program and the accompanying materials\r
  are licensed and made available under the terms and conditions of the BSD License\r
  which accompanies this distribution.  The full text of the license may be found at\r
  http://opensource.org/licenses/bsd-license.php\r
\r
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
//\r
// Include common header file for this module.\r
//\r
#include "BaseIoLibIntrinsicInternal.h"\r
\r
#define MAP_PORT_BASE_TO_MEM(_Port) \\r
    ((((_Port) & 0xfffc) << 10) | ((_Port) & 0x0fff))\r
\r
/**\r
  Translates I/O port address to memory address.\r
\r
  This function translates I/O port address to memory address by adding the 64MB\r
  aligned I/O Port space to the I/O address.\r
  If I/O Port space base is not 64MB aligned, then ASSERT ().  \r
\r
  @param  Port  The I/O port to read.\r
\r
  @return The memory address.\r
\r
**/\r
UINTN\r
InternalGetMemoryMapAddress (\r
  IN UINTN                  Port\r
  )\r
{\r
  UINTN                     Address;\r
  UINTN                     IoBlockBaseAddress;\r
\r
  Address            = MAP_PORT_BASE_TO_MEM (Port);\r
  IoBlockBaseAddress = PcdGet64(PcdIoBlockBaseAddressForIpf);\r
\r
  //\r
  // Make sure that the I/O Port space base is 64MB aligned.\r
  // \r
  ASSERT ((IoBlockBaseAddress & 0x3ffffff) == 0);\r
  Address += IoBlockBaseAddress;\r
\r
  return Address;\r
}\r
\r
/**\r
  Reads a 8-bit I/O port.\r
\r
  Reads the 8-bit I/O port specified by Port. The 8-bit read value is returned.\r
  This function must guarantee that all I/O read and write operations are\r
  serialized.\r
\r
  @param  Port  The I/O port to read.\r
\r
  @return The value read from Port.\r
\r
**/\r
UINT8\r
EFIAPI\r
IoRead8 (\r
  IN  UINT64                 Port\r
  )\r
{\r
  return MmioRead8 (InternalGetMemoryMapAddress (Port));\r
}\r
\r
/**\r
  Reads a 16-bit I/O port.\r
\r
  Reads the 16-bit I/O port specified by Port. The 16-bit read value is returned.\r
  This function must guarantee that all I/O read and write operations are\r
  serialized.\r
\r
  @param  Port  The I/O port to read.\r
\r
  @return The value read from Port.\r
\r
**/\r
UINT16\r
EFIAPI\r
IoRead16 (\r
  IN  UINT64                 Port\r
  )\r
{\r
  return MmioRead16 (InternalGetMemoryMapAddress (Port));\r
}\r
\r
/**\r
  Reads a 32-bit I/O port.\r
\r
  Reads the 32-bit I/O port specified by Port. The 32-bit read value is returned.\r
  This function must guarantee that all I/O read and write operations are\r
  serialized.\r
\r
  @param  Port  The I/O port to read.\r
\r
  @return The value read from Port.\r
\r
**/\r
UINT32\r
EFIAPI\r
IoRead32 (\r
  IN  UINT64                 Port\r
  )\r
{\r
  return MmioRead32 (InternalGetMemoryMapAddress (Port));\r
}\r
\r
/**\r
  Reads a 64-bit I/O port.\r
\r
  Reads the 64-bit I/O port specified by Port. The 64-bit read value is returned.\r
  This function must guarantee that all I/O read and write operations are\r
  serialized.\r
\r
  If 64-bit I/O port operations are not supported, then ASSERT().\r
\r
  @param  Port  The I/O port to read.\r
\r
  @return The value read from Port.\r
\r
**/\r
UINT64\r
EFIAPI\r
IoRead64 (\r
  IN      UINTN                     Port\r
  )\r
{\r
  ASSERT (FALSE);\r
  return 0;\r
}\r
\r
/**\r
  Writes a 8-bit I/O port.\r
\r
  Writes the 8-bit I/O port specified by Port with the value specified by Value\r
  and returns Value. This function must guarantee that all I/O read and write\r
  operations are serialized.\r
\r
  @param  Port  The I/O port to write.\r
  @param  Value The value to write to the I/O port.\r
\r
  @return The value written to the I/O port. It equals to the\r
          input Value instead of the actual value read back from\r
          the I/O port.\r
\r
**/\r
UINT8\r
EFIAPI\r
IoWrite8 (\r
  IN  UINT64                 Port,\r
  IN  UINT8                  Data\r
  )\r
{\r
  return MmioWrite8 (InternalGetMemoryMapAddress (Port), Data);\r
}\r
\r
/**\r
  Writes a 16-bit I/O port.\r
\r
  Writes the 16-bit I/O port specified by Port with the value specified by Value\r
  and returns Value. This function must guarantee that all I/O read and write\r
  operations are serialized.\r
\r
  @param  Port  The I/O port to write.\r
  @param  Value The value to write to the I/O port.\r
\r
  @return The value written to the I/O port. It equals to the\r
          input Value instead of the actual value read back from\r
          the I/O port.\r
\r
**/\r
UINT16\r
EFIAPI\r
IoWrite16 (\r
  IN  UINT64                 Port,\r
  IN  UINT16                 Data\r
  )\r
{\r
  return MmioWrite16 (InternalGetMemoryMapAddress (Port), Data);\r
}\r
\r
/**\r
  Writes a 32-bit I/O port.\r
\r
  Writes the 32-bit I/O port specified by Port with the value specified by Value\r
  and returns Value. This function must guarantee that all I/O read and write\r
  operations are serialized.\r
\r
  @param  Port  The I/O port to write.\r
  @param  Value The value to write to the I/O port.\r
\r
  @return The value written to the I/O port. It equals to the\r
          input Value instead of the actual value read back from\r
          the I/O port.\r
\r
**/\r
UINT32\r
EFIAPI\r
IoWrite32 (\r
  IN  UINT64                 Port,\r
  IN  UINT32                 Data\r
  )\r
{\r
  return MmioWrite32 (InternalGetMemoryMapAddress (Port), Data);\r
}\r
\r
/**\r
  Writes a 64-bit I/O port.\r
\r
  Writes the 64-bit I/O port specified by Port with the value specified by Value\r
  and returns Value. This function must guarantee that all I/O read and write\r
  operations are serialized.\r
\r
  If 64-bit I/O port operations are not supported, then ASSERT().\r
\r
  @param  Port  The I/O port to write.\r
  @param  Value The value to write to the I/O port.\r
\r
  @return The value written to the I/O port. It equals to the\r
          input Value instead of the actual value read back from\r
          the I/O port.\r
\r
**/\r
UINT64\r
EFIAPI\r
IoWrite64 (\r
  IN      UINTN                     Port,\r
  IN      UINT64                    Value\r
  )\r
{\r
  ASSERT (FALSE);\r
  return 0;\r
}\r
\r
/**\r
  Reads a 8-bit MMIO register.\r
\r
  Reads the 8-bit MMIO register specified by Address. The 8-bit read value is\r
  returned. This function must guarantee that all MMIO read and write\r
  operations are serialized.\r
\r
  @param  Address The MMIO register to read.\r
\r
  @return The value read from Address.\r
\r
**/\r
UINT8\r
EFIAPI\r
MmioRead8 (\r
  IN  UINT64                 Address\r
  )\r
{\r
  UINT8            Data;\r
\r
  Address |= BIT63;\r
\r
  MemoryFence ();\r
  Data = *((volatile UINT8 *) Address);\r
  MemoryFence ();\r
\r
  return Data;\r
}\r
\r
/**\r
  Reads a 16-bit MMIO register.\r
\r
  Reads the 16-bit MMIO register specified by Address. The 16-bit read value is\r
  returned. This function must guarantee that all MMIO read and write\r
  operations are serialized.\r
\r
  @param  Address The MMIO register to read.\r
\r
  @return The value read from Address.\r
\r
**/\r
UINT16\r
EFIAPI\r
MmioRead16 (\r
  IN  UINT64                 Address\r
  )\r
{\r
  UINT16           Data;\r
\r
  //\r
  // Make sure that Address is 16-bit aligned.\r
  // \r
  ASSERT ((Address & 1) == 0);\r
\r
  Address |= BIT63;\r
\r
  MemoryFence ();\r
  Data = *((volatile UINT16 *) Address);\r
  MemoryFence ();\r
\r
  return Data;\r
}\r
\r
/**\r
  Reads a 32-bit MMIO register.\r
\r
  Reads the 32-bit MMIO register specified by Address. The 32-bit read value is\r
  returned. This function must guarantee that all MMIO read and write\r
  operations are serialized.\r
\r
  @param  Address The MMIO register to read.\r
\r
  @return The value read from Address.\r
\r
**/\r
UINT32\r
EFIAPI\r
MmioRead32 (\r
  IN  UINT64                 Address\r
  )\r
{\r
  UINT32           Data;\r
\r
  //\r
  // Make sure that Address is 32-bit aligned.\r
  // \r
  ASSERT ((Address & 3) == 0);\r
\r
  Address |= BIT63;\r
\r
  MemoryFence ();\r
  Data = *((volatile UINT32 *) Address);\r
  MemoryFence ();\r
\r
  return Data;\r
}\r
\r
/**\r
  Reads a 64-bit MMIO register.\r
\r
  Reads the 64-bit MMIO register specified by Address. The 64-bit read value is\r
  returned. This function must guarantee that all MMIO read and write\r
  operations are serialized.\r
\r
  @param  Address The MMIO register to read.\r
\r
  @return The value read from Address.\r
\r
**/\r
UINT64\r
EFIAPI\r
MmioRead64 (\r
  IN  UINT64                 Address\r
  )\r
{\r
  UINT64           Data;\r
\r
  //\r
  // Make sure that Address is 64-bit aligned.\r
  // \r
  ASSERT ((Address & 7) == 0);\r
\r
  Address |= BIT63;\r
\r
  MemoryFence ();\r
  Data = *((volatile UINT64 *) Address);\r
  MemoryFence ();\r
\r
  return Data;\r
\r
}\r
\r
/**\r
  Writes a 8-bit MMIO register.\r
\r
  Writes the 8-bit MMIO register specified by Address with the value specified\r
  by Value and returns Value. This function must guarantee that all MMIO read\r
  and write operations are serialized.\r
\r
  @param  Address The MMIO register to write.\r
  @param  Data    The value to write to the MMIO register.\r
\r
  @return The value written to the Mmio. It equals to the\r
          input Value instead of the actual value read back from\r
          the Mmio.\r
\r
**/\r
UINT8\r
EFIAPI\r
MmioWrite8 (\r
  IN  UINT64                 Address,\r
  IN  UINT8                  Data\r
  )\r
{\r
  Address |= BIT63;\r
\r
  MemoryFence ();\r
  *((volatile UINT8 *) Address) = Data;\r
  MemoryFence ();\r
\r
  return Data;\r
}\r
\r
/**\r
  Writes a 16-bit MMIO register.\r
\r
  Writes the 16-bit MMIO register specified by Address with the value specified\r
  by Value and returns Value. This function must guarantee that all MMIO read\r
  and write operations are serialized.\r
\r
  @param  Address The MMIO register to write.\r
  @param  Data    The value to write to the MMIO register.\r
\r
  @return The value written to the Mmio. It equals to the\r
          input Value instead of the actual value read back from\r
          the Mmio.\r
\r
**/\r
UINT16\r
EFIAPI\r
MmioWrite16 (\r
  IN  UINT64                 Address,\r
  IN  UINT16                 Data\r
  )\r
{\r
  //\r
  // Make sure that Address is 16-bit aligned.\r
  // \r
  ASSERT ((Address & 1) == 0);\r
\r
  Address |= BIT63;\r
\r
  MemoryFence ();\r
  *((volatile UINT16 *) Address) = Data;\r
  MemoryFence ();\r
\r
  return Data;\r
}\r
\r
/**\r
  Writes a 32-bit MMIO register.\r
\r
  Writes the 32-bit MMIO register specified by Address with the value specified\r
  by Value and returns Value. This function must guarantee that all MMIO read\r
  and write operations are serialized.\r
\r
  @param  Address The MMIO register to write.\r
  @param  Data    The value to write to the MMIO register.\r
\r
  @return The value written to the Mmio. It equals to the\r
          input Value instead of the actual value read back from\r
          the Mmio.\r
\r
**/\r
UINT32\r
EFIAPI\r
MmioWrite32 (\r
  IN  UINT64                 Address,\r
  IN  UINT32                 Data\r
  )\r
{\r
  //\r
  // Make sure that Address is 32-bit aligned.\r
  // \r
  ASSERT ((Address & 3) == 0);\r
\r
  Address |= BIT63;\r
\r
  MemoryFence ();\r
  *((volatile UINT32 *) Address) = Data;\r
  MemoryFence ();\r
\r
  return Data;\r
}\r
\r
/**\r
  Writes a 64-bit MMIO register.\r
\r
  Writes the 64-bit MMIO register specified by Address with the value specified\r
  by Value and returns Value. This function must guarantee that all MMIO read\r
  and write operations are serialized.\r
\r
  @param  Address The MMIO register to write.\r
  @param  Data    The value to write to the MMIO register.\r
\r
  @return The value written to the Mmio. It equals to the\r
          input Value instead of the actual value read back from\r
          the Mmio.\r
\r
**/\r
UINT64\r
EFIAPI\r
MmioWrite64 (\r
  IN  UINT64                 Address,\r
  IN  UINT64                 Data\r
  )\r
{\r
  //\r
  // Make sure that Address is 64-bit aligned.\r
  // \r
  ASSERT ((Address & 7) == 0);\r
\r
  Address |= BIT63;\r
\r
  MemoryFence ();\r
  *((volatile UINT64 *) Address) = Data;\r
  MemoryFence ();\r
\r
  return Data;\r
}\r