/** @file | |
IoFifo read/write routines. | |
Copyright (c) 2021 - 2023, Intel Corporation. All rights reserved.<BR> | |
SPDX-License-Identifier: BSD-2-Clause-Patent | |
**/ | |
#include "BaseIoLibIntrinsicInternal.h" | |
#include "IoLibSev.h" | |
#include "IoLibTdx.h" | |
#include <Uefi/UefiBaseType.h> | |
#include <Library/TdxLib.h> | |
/** | |
Reads an 8-bit I/O port fifo into a block of memory. | |
Reads the 8-bit I/O fifo port specified by Port. | |
The port is read Count times, and the read data is | |
stored in the provided Buffer. | |
This function must guarantee that all I/O read and write operations are | |
serialized. | |
If 8-bit I/O port operations are not supported, then ASSERT(). | |
In TDX a serial of TdIoRead8 is invoked to read the I/O port fifo. | |
@param Port The I/O port to read. | |
@param Count The number of times to read I/O port. | |
@param Buffer The buffer to store the read data into. | |
**/ | |
VOID | |
EFIAPI | |
IoReadFifo8 ( | |
IN UINTN Port, | |
IN UINTN Count, | |
OUT VOID *Buffer | |
) | |
{ | |
if (IsTdxGuest ()) { | |
TdIoReadFifo8 (Port, Count, Buffer); | |
} else { | |
SevIoReadFifo8 (Port, Count, Buffer); | |
} | |
} | |
/** | |
Writes a block of memory into an 8-bit I/O port fifo. | |
Writes the 8-bit I/O fifo port specified by Port. | |
The port is written Count times, and the write data is | |
retrieved from the provided Buffer. | |
This function must guarantee that all I/O write and write operations are | |
serialized. | |
If 8-bit I/O port operations are not supported, then ASSERT(). | |
In TDX a serial of TdIoWrite8 is invoked to write data to the I/O port. | |
@param Port The I/O port to write. | |
@param Count The number of times to write I/O port. | |
@param Buffer The buffer to retrieve the write data from. | |
**/ | |
VOID | |
EFIAPI | |
IoWriteFifo8 ( | |
IN UINTN Port, | |
IN UINTN Count, | |
IN VOID *Buffer | |
) | |
{ | |
if (IsTdxGuest ()) { | |
TdIoWriteFifo8 (Port, Count, Buffer); | |
} else { | |
SevIoWriteFifo8 (Port, Count, Buffer); | |
} | |
} | |
/** | |
Reads a 16-bit I/O port fifo into a block of memory. | |
Reads the 16-bit I/O fifo port specified by Port. | |
The port is read Count times, and the read data is | |
stored in the provided Buffer. | |
This function must guarantee that all I/O read and write operations are | |
serialized. | |
If 16-bit I/O port operations are not supported, then ASSERT(). | |
In TDX a serial of TdIoRead16 is invoked to read data from the I/O port. | |
@param Port The I/O port to read. | |
@param Count The number of times to read I/O port. | |
@param Buffer The buffer to store the read data into. | |
**/ | |
VOID | |
EFIAPI | |
IoReadFifo16 ( | |
IN UINTN Port, | |
IN UINTN Count, | |
OUT VOID *Buffer | |
) | |
{ | |
if (IsTdxGuest ()) { | |
TdIoReadFifo16 (Port, Count, Buffer); | |
} else { | |
SevIoReadFifo16 (Port, Count, Buffer); | |
} | |
} | |
/** | |
Writes a block of memory into a 16-bit I/O port fifo. | |
Writes the 16-bit I/O fifo port specified by Port. | |
The port is written Count times, and the write data is | |
retrieved from the provided Buffer. | |
This function must guarantee that all I/O write and write operations are | |
serialized. | |
If 16-bit I/O port operations are not supported, then ASSERT(). | |
In TDX a serial of TdIoWrite16 is invoked to write data to the I/O port. | |
@param Port The I/O port to write. | |
@param Count The number of times to write I/O port. | |
@param Buffer The buffer to retrieve the write data from. | |
**/ | |
VOID | |
EFIAPI | |
IoWriteFifo16 ( | |
IN UINTN Port, | |
IN UINTN Count, | |
IN VOID *Buffer | |
) | |
{ | |
if (IsTdxGuest ()) { | |
TdIoWriteFifo16 (Port, Count, Buffer); | |
} else { | |
SevIoWriteFifo16 (Port, Count, Buffer); | |
} | |
} | |
/** | |
Reads a 32-bit I/O port fifo into a block of memory. | |
Reads the 32-bit I/O fifo port specified by Port. | |
The port is read Count times, and the read data is | |
stored in the provided Buffer. | |
This function must guarantee that all I/O read and write operations are | |
serialized. | |
If 32-bit I/O port operations are not supported, then ASSERT(). | |
In TDX a serial of TdIoRead32 is invoked to read data from the I/O port. | |
@param Port The I/O port to read. | |
@param Count The number of times to read I/O port. | |
@param Buffer The buffer to store the read data into. | |
**/ | |
VOID | |
EFIAPI | |
IoReadFifo32 ( | |
IN UINTN Port, | |
IN UINTN Count, | |
OUT VOID *Buffer | |
) | |
{ | |
if (IsTdxGuest ()) { | |
TdIoReadFifo32 (Port, Count, Buffer); | |
} else { | |
SevIoReadFifo32 (Port, Count, Buffer); | |
} | |
} | |
/** | |
Writes a block of memory into a 32-bit I/O port fifo. | |
Writes the 32-bit I/O fifo port specified by Port. | |
The port is written Count times, and the write data is | |
retrieved from the provided Buffer. | |
This function must guarantee that all I/O write and write operations are | |
serialized. | |
If 32-bit I/O port operations are not supported, then ASSERT(). | |
In TDX a serial of TdIoWrite32 is invoked to write data to the I/O port. | |
@param Port The I/O port to write. | |
@param Count The number of times to write I/O port. | |
@param Buffer The buffer to retrieve the write data from. | |
**/ | |
VOID | |
EFIAPI | |
IoWriteFifo32 ( | |
IN UINTN Port, | |
IN UINTN Count, | |
IN VOID *Buffer | |
) | |
{ | |
if (IsTdxGuest ()) { | |
TdIoWriteFifo32 (Port, Count, Buffer); | |
} else { | |
SevIoWriteFifo32 (Port, Count, Buffer); | |
} | |
} |