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/** @file
Internal include file of CPU I/O DXE Driver.
Copyright (c) 2004 - 2010, Intel Corporation. All rights reserved.<BR>
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.
**/
#ifndef __CPU_IO_DXE_H__
#define __CPU_IO_DXE_H__
#include <PiDxe.h>
#include <Protocol/CpuIo.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/IoLib.h>
#include <Library/UefiBootServicesTableLib.h>
#define MAX_IO_PORT_ADDRESS 0xFFFF
/**
Reads memory-mapped registers.
The I/O operations are carried out exactly as requested. The caller is responsible
for satisfying any alignment and I/O width restrictions that a PI System on a
platform might require. For example on some platforms, width requests of
EfiCpuIoWidthUint64 do not work. Misaligned buffers, on the other hand, will
be handled by the driver.
If Width is EfiCpuIoWidthUint8, EfiCpuIoWidthUint16, EfiCpuIoWidthUint32,
or EfiCpuIoWidthUint64, then both Address and Buffer are incremented for
each of the Count operations that is performed.
If Width is EfiCpuIoWidthFifoUint8, EfiCpuIoWidthFifoUint16,
EfiCpuIoWidthFifoUint32, or EfiCpuIoWidthFifoUint64, then only Buffer is
incremented for each of the Count operations that is performed. The read or
write operation is performed Count times on the same Address.
If Width is EfiCpuIoWidthFillUint8, EfiCpuIoWidthFillUint16,
EfiCpuIoWidthFillUint32, or EfiCpuIoWidthFillUint64, then only Address is
incremented for each of the Count operations that is performed. The read or
write operation is performed Count times from the first element of Buffer.
@param[in] This A pointer to the EFI_CPU_IO_PROTOCOL instance.
@param[in] Width Signifies the width of the I/O or Memory operation.
@param[in] Address The base address of the I/O operation.
@param[in] Count The number of I/O operations to perform. The number of
bytes moved is Width size * Count, starting at Address.
@param[out] Buffer For read operations, the destination buffer to store the results.
For write operations, the source buffer from which to write data.
@retval EFI_SUCCESS The data was read from or written to the PI system.
@retval EFI_INVALID_PARAMETER Width is invalid for this PI system.
@retval EFI_INVALID_PARAMETER Buffer is NULL.
@retval EFI_UNSUPPORTED The Buffer is not aligned for the given Width.
@retval EFI_UNSUPPORTED The address range specified by Address, Width,
and Count is not valid for this PI system.
**/
EFI_STATUS
EFIAPI
CpuMemoryServiceRead (
IN EFI_CPU_IO_PROTOCOL *This,
IN EFI_CPU_IO_PROTOCOL_WIDTH Width,
IN UINT64 Address,
IN UINTN Count,
OUT VOID *Buffer
);
/**
Writes memory-mapped registers.
The I/O operations are carried out exactly as requested. The caller is responsible
for satisfying any alignment and I/O width restrictions that a PI System on a
platform might require. For example on some platforms, width requests of
EfiCpuIoWidthUint64 do not work. Misaligned buffers, on the other hand, will
be handled by the driver.
If Width is EfiCpuIoWidthUint8, EfiCpuIoWidthUint16, EfiCpuIoWidthUint32,
or EfiCpuIoWidthUint64, then both Address and Buffer are incremented for
each of the Count operations that is performed.
If Width is EfiCpuIoWidthFifoUint8, EfiCpuIoWidthFifoUint16,
EfiCpuIoWidthFifoUint32, or EfiCpuIoWidthFifoUint64, then only Buffer is
incremented for each of the Count operations that is performed. The read or
write operation is performed Count times on the same Address.
If Width is EfiCpuIoWidthFillUint8, EfiCpuIoWidthFillUint16,
EfiCpuIoWidthFillUint32, or EfiCpuIoWidthFillUint64, then only Address is
incremented for each of the Count operations that is performed. The read or
write operation is performed Count times from the first element of Buffer.
@param[in] This A pointer to the EFI_CPU_IO_PROTOCOL instance.
@param[in] Width Signifies the width of the I/O or Memory operation.
@param[in] Address The base address of the I/O operation.
@param[in] Count The number of I/O operations to perform. The number of
bytes moved is Width size * Count, starting at Address.
@param[in] Buffer For read operations, the destination buffer to store the results.
For write operations, the source buffer from which to write data.
@retval EFI_SUCCESS The data was read from or written to the PI system.
@retval EFI_INVALID_PARAMETER Width is invalid for this PI system.
@retval EFI_INVALID_PARAMETER Buffer is NULL.
@retval EFI_UNSUPPORTED The Buffer is not aligned for the given Width.
@retval EFI_UNSUPPORTED The address range specified by Address, Width,
and Count is not valid for this PI system.
**/
EFI_STATUS
EFIAPI
CpuMemoryServiceWrite (
IN EFI_CPU_IO_PROTOCOL *This,
IN EFI_CPU_IO_PROTOCOL_WIDTH Width,
IN UINT64 Address,
IN UINTN Count,
IN VOID *Buffer
);
/**
Reads I/O registers.
The I/O operations are carried out exactly as requested. The caller is responsible
for satisfying any alignment and I/O width restrictions that a PI System on a
platform might require. For example on some platforms, width requests of
EfiCpuIoWidthUint64 do not work. Misaligned buffers, on the other hand, will
be handled by the driver.
If Width is EfiCpuIoWidthUint8, EfiCpuIoWidthUint16, EfiCpuIoWidthUint32,
or EfiCpuIoWidthUint64, then both Address and Buffer are incremented for
each of the Count operations that is performed.
If Width is EfiCpuIoWidthFifoUint8, EfiCpuIoWidthFifoUint16,
EfiCpuIoWidthFifoUint32, or EfiCpuIoWidthFifoUint64, then only Buffer is
incremented for each of the Count operations that is performed. The read or
write operation is performed Count times on the same Address.
If Width is EfiCpuIoWidthFillUint8, EfiCpuIoWidthFillUint16,
EfiCpuIoWidthFillUint32, or EfiCpuIoWidthFillUint64, then only Address is
incremented for each of the Count operations that is performed. The read or
write operation is performed Count times from the first element of Buffer.
@param[in] This A pointer to the EFI_CPU_IO_PROTOCOL instance.
@param[in] Width Signifies the width of the I/O or Memory operation.
@param[in] Address The base address of the I/O operation.
@param[in] Count The number of I/O operations to perform. The number of
bytes moved is Width size * Count, starting at Address.
@param[out] Buffer For read operations, the destination buffer to store the results.
For write operations, the source buffer from which to write data.
@retval EFI_SUCCESS The data was read from or written to the PI system.
@retval EFI_INVALID_PARAMETER Width is invalid for this PI system.
@retval EFI_INVALID_PARAMETER Buffer is NULL.
@retval EFI_UNSUPPORTED The Buffer is not aligned for the given Width.
@retval EFI_UNSUPPORTED The address range specified by Address, Width,
and Count is not valid for this PI system.
**/
EFI_STATUS
EFIAPI
CpuIoServiceRead (
IN EFI_CPU_IO_PROTOCOL *This,
IN EFI_CPU_IO_PROTOCOL_WIDTH Width,
IN UINT64 Address,
IN UINTN Count,
OUT VOID *Buffer
);
/**
Write I/O registers.
The I/O operations are carried out exactly as requested. The caller is responsible
for satisfying any alignment and I/O width restrictions that a PI System on a
platform might require. For example on some platforms, width requests of
EfiCpuIoWidthUint64 do not work. Misaligned buffers, on the other hand, will
be handled by the driver.
If Width is EfiCpuIoWidthUint8, EfiCpuIoWidthUint16, EfiCpuIoWidthUint32,
or EfiCpuIoWidthUint64, then both Address and Buffer are incremented for
each of the Count operations that is performed.
If Width is EfiCpuIoWidthFifoUint8, EfiCpuIoWidthFifoUint16,
EfiCpuIoWidthFifoUint32, or EfiCpuIoWidthFifoUint64, then only Buffer is
incremented for each of the Count operations that is performed. The read or
write operation is performed Count times on the same Address.
If Width is EfiCpuIoWidthFillUint8, EfiCpuIoWidthFillUint16,
EfiCpuIoWidthFillUint32, or EfiCpuIoWidthFillUint64, then only Address is
incremented for each of the Count operations that is performed. The read or
write operation is performed Count times from the first element of Buffer.
@param[in] This A pointer to the EFI_CPU_IO_PROTOCOL instance.
@param[in] Width Signifies the width of the I/O or Memory operation.
@param[in] Address The base address of the I/O operation.
@param[in] Count The number of I/O operations to perform. The number of
bytes moved is Width size * Count, starting at Address.
@param[in] Buffer For read operations, the destination buffer to store the results.
For write operations, the source buffer from which to write data.
@retval EFI_SUCCESS The data was read from or written to the PI system.
@retval EFI_INVALID_PARAMETER Width is invalid for this PI system.
@retval EFI_INVALID_PARAMETER Buffer is NULL.
@retval EFI_UNSUPPORTED The Buffer is not aligned for the given Width.
@retval EFI_UNSUPPORTED The address range specified by Address, Width,
and Count is not valid for this PI system.
**/
EFI_STATUS
EFIAPI
CpuIoServiceWrite (
IN EFI_CPU_IO_PROTOCOL *This,
IN EFI_CPU_IO_PROTOCOL_WIDTH Width,
IN UINT64 Address,
IN UINTN Count,
IN VOID *Buffer
);
#endif
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