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audk/MdePkg/Library/BaseIoLibIntrinsic/IoLibIpf.c

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