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/** @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);
}
}
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