mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-01 12:53:27 +01:00
168 lines
3.4 KiB
C
168 lines
3.4 KiB
C
/** @file
|
|
QEMU/KVM Firmware Configuration access
|
|
|
|
Copyright (c) 2011 - 2013, Intel Corporation. All rights reserved.<BR>
|
|
Copyright (C) 2013, Red Hat, Inc.
|
|
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
**/
|
|
|
|
#ifndef __FW_CFG_LIB__
|
|
#define __FW_CFG_LIB__
|
|
|
|
#include <IndustryStandard/QemuFwCfg.h>
|
|
|
|
/**
|
|
Returns a boolean indicating if the firmware configuration interface
|
|
is available or not.
|
|
|
|
This function may change fw_cfg state.
|
|
|
|
@retval TRUE The interface is available
|
|
@retval FALSE The interface is not available
|
|
|
|
**/
|
|
BOOLEAN
|
|
EFIAPI
|
|
QemuFwCfgIsAvailable (
|
|
VOID
|
|
);
|
|
|
|
/**
|
|
Selects a firmware configuration item for reading.
|
|
|
|
Following this call, any data read from this item will start from
|
|
the beginning of the configuration item's data.
|
|
|
|
@param[in] QemuFwCfgItem - Firmware Configuration item to read
|
|
|
|
**/
|
|
VOID
|
|
EFIAPI
|
|
QemuFwCfgSelectItem (
|
|
IN FIRMWARE_CONFIG_ITEM QemuFwCfgItem
|
|
);
|
|
|
|
/**
|
|
Reads firmware configuration bytes into a buffer
|
|
|
|
If called multiple times, then the data read will
|
|
continue at the offset of the firmware configuration
|
|
item where the previous read ended.
|
|
|
|
@param[in] Size - Size in bytes to read
|
|
@param[in] Buffer - Buffer to store data into
|
|
|
|
**/
|
|
VOID
|
|
EFIAPI
|
|
QemuFwCfgReadBytes (
|
|
IN UINTN Size,
|
|
IN VOID *Buffer OPTIONAL
|
|
);
|
|
|
|
/**
|
|
Writes firmware configuration bytes from a buffer
|
|
|
|
If called multiple times, then the data written will
|
|
continue at the offset of the firmware configuration
|
|
item where the previous write ended.
|
|
|
|
@param[in] Size - Size in bytes to write
|
|
@param[in] Buffer - Buffer to read data from
|
|
|
|
**/
|
|
VOID
|
|
EFIAPI
|
|
QemuFwCfgWriteBytes (
|
|
IN UINTN Size,
|
|
IN VOID *Buffer
|
|
);
|
|
|
|
/**
|
|
Skip bytes in the firmware configuration item.
|
|
|
|
Increase the offset of the firmware configuration item without transferring
|
|
bytes between the item and a caller-provided buffer. Subsequent read, write
|
|
or skip operations will commence at the increased offset.
|
|
|
|
@param[in] Size Number of bytes to skip.
|
|
**/
|
|
VOID
|
|
EFIAPI
|
|
QemuFwCfgSkipBytes (
|
|
IN UINTN Size
|
|
);
|
|
|
|
/**
|
|
Reads a UINT8 firmware configuration value
|
|
|
|
@return Value of Firmware Configuration item read
|
|
|
|
**/
|
|
UINT8
|
|
EFIAPI
|
|
QemuFwCfgRead8 (
|
|
VOID
|
|
);
|
|
|
|
/**
|
|
Reads a UINT16 firmware configuration value
|
|
|
|
@return Value of Firmware Configuration item read
|
|
|
|
**/
|
|
UINT16
|
|
EFIAPI
|
|
QemuFwCfgRead16 (
|
|
VOID
|
|
);
|
|
|
|
/**
|
|
Reads a UINT32 firmware configuration value
|
|
|
|
@return Value of Firmware Configuration item read
|
|
|
|
**/
|
|
UINT32
|
|
EFIAPI
|
|
QemuFwCfgRead32 (
|
|
VOID
|
|
);
|
|
|
|
/**
|
|
Reads a UINT64 firmware configuration value
|
|
|
|
@return Value of Firmware Configuration item read
|
|
|
|
**/
|
|
UINT64
|
|
EFIAPI
|
|
QemuFwCfgRead64 (
|
|
VOID
|
|
);
|
|
|
|
/**
|
|
Find the configuration item corresponding to the firmware configuration file.
|
|
|
|
@param[in] Name - Name of file to look up.
|
|
@param[out] Item - Configuration item corresponding to the file, to be passed
|
|
to QemuFwCfgSelectItem ().
|
|
@param[out] Size - Number of bytes in the file.
|
|
|
|
@return RETURN_SUCCESS If file is found.
|
|
RETURN_NOT_FOUND If file is not found.
|
|
RETURN_UNSUPPORTED If firmware configuration is unavailable.
|
|
|
|
**/
|
|
RETURN_STATUS
|
|
EFIAPI
|
|
QemuFwCfgFindFile (
|
|
IN CONST CHAR8 *Name,
|
|
OUT FIRMWARE_CONFIG_ITEM *Item,
|
|
OUT UINTN *Size
|
|
);
|
|
|
|
#endif
|