/** @file | |
Header file for SEV IO library. | |
Copyright (c) 2021, Intel Corporation. All rights reserved.<BR> | |
SPDX-License-Identifier: BSD-2-Clause-Patent | |
**/ | |
#ifndef IOLIB_SEV_H_ | |
#define IOLIB_SEV_H_ | |
#include <Base.h> | |
#include <Library/BaseLib.h> | |
#include <Library/DebugLib.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(). | |
@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 | |
SevIoReadFifo8 ( | |
IN UINTN Port, | |
IN UINTN Count, | |
OUT VOID *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(). | |
@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 | |
SevIoWriteFifo8 ( | |
IN UINTN Port, | |
IN UINTN Count, | |
IN VOID *Buffer | |
); | |
/** | |
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(). | |
@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 | |
SevIoReadFifo16 ( | |
IN UINTN Port, | |
IN UINTN Count, | |
OUT VOID *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(). | |
@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 | |
SevIoWriteFifo16 ( | |
IN UINTN Port, | |
IN UINTN Count, | |
IN VOID *Buffer | |
); | |
/** | |
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(). | |
@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 | |
SevIoReadFifo32 ( | |
IN UINTN Port, | |
IN UINTN Count, | |
OUT VOID *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(). | |
@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 | |
SevIoWriteFifo32 ( | |
IN UINTN Port, | |
IN UINTN Count, | |
IN VOID *Buffer | |
); | |
#endif |