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Diffstat (limited to 'src/VBox/Devices/EFI/Firmware/MdeModulePkg/Include/Library/ResetUtilityLib.h')
-rw-r--r-- | src/VBox/Devices/EFI/Firmware/MdeModulePkg/Include/Library/ResetUtilityLib.h | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Include/Library/ResetUtilityLib.h b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Include/Library/ResetUtilityLib.h new file mode 100644 index 00000000..86f9cd93 --- /dev/null +++ b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Include/Library/ResetUtilityLib.h @@ -0,0 +1,130 @@ +/** @file + This header describes various helper functions for resetting the system. + + Copyright (c) 2017 - 2019 Intel Corporation. All rights reserved.<BR> + Copyright (c) 2016 Microsoft Corporation. All rights reserved.<BR> + + SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ +#ifndef _RESET_UTILITY_LIB_H_ +#define _RESET_UTILITY_LIB_H_ + +#include <Uefi/UefiMultiPhase.h> + +/** + This is a shorthand helper function to reset with reset type and a subtype + so that the caller doesn't have to bother with a function that has half + a dozen parameters. + + This will generate a reset with status EFI_SUCCESS, a NULL string, and + no custom data. The subtype will be formatted in such a way that it can be + picked up by notification registrations and custom handlers. + + NOTE: This call will fail if the architectural ResetSystem underpinnings + are not initialized. For DXE, you can add gEfiResetArchProtocolGuid + to your DEPEX. + + @param[in] ResetType The default EFI_RESET_TYPE of the reset. + @param[in] ResetSubtype GUID pointer for the reset subtype to be used. + +**/ +VOID +EFIAPI +ResetSystemWithSubtype ( + IN EFI_RESET_TYPE ResetType, + IN CONST GUID *ResetSubtype + ); + +/** + This is a shorthand helper function to reset with the reset type + 'EfiResetPlatformSpecific' and a subtype so that the caller doesn't + have to bother with a function that has half a dozen parameters. + + This will generate a reset with status EFI_SUCCESS, a NULL string, and + no custom data. The subtype will be formatted in such a way that it can be + picked up by notification registrations and custom handlers. + + NOTE: This call will fail if the architectural ResetSystem underpinnings + are not initialized. For DXE, you can add gEfiResetArchProtocolGuid + to your DEPEX. + + @param[in] ResetSubtype GUID pointer for the reset subtype to be used. + +**/ +VOID +EFIAPI +ResetPlatformSpecificGuid ( + IN CONST GUID *ResetSubtype + ); + +/** + This function examines the DataSize and ResetData parameters passed to + to ResetSystem() and detemrines if the ResetData contains a Null-terminated + Unicode string followed by a GUID specific subtype. If the GUID specific + subtype is present, then a pointer to the GUID value in ResetData is returned. + + @param[in] DataSize The size, in bytes, of ResetData. + @param[in] ResetData Pointer to the data buffer passed into ResetSystem(). + + @retval Pointer Pointer to the GUID value in ResetData. + @retval NULL ResetData is NULL. + @retval NULL ResetData does not start with a Null-terminated + Unicode string. + @retval NULL A Null-terminated Unicode string is present, but there + are less than sizeof (GUID) bytes after the string. + @retval NULL No subtype is found. + +**/ +GUID * +EFIAPI +GetResetPlatformSpecificGuid ( + IN UINTN DataSize, + IN CONST VOID *ResetData + ); + +/** + This is a helper function that creates the reset data buffer that can be + passed into ResetSystem(). + + The reset data buffer is returned in ResetData and contains ResetString + followed by the ResetSubtype GUID followed by the ExtraData. + + NOTE: Strings are internally limited by MAX_UINT16. + + @param[in, out] ResetDataSize On input, the size of the ResetData buffer. On + output, either the total number of bytes + copied, or the required buffer size. + @param[in, out] ResetData A pointer to the buffer in which to place the + final structure. + @param[in] ResetSubtype Pointer to the GUID specific subtype. This + parameter is optional and may be NULL. + @param[in] ResetString Pointer to a Null-terminated Unicode string + that describes the reset. This parameter is + optional and may be NULL. + @param[in] ExtraDataSize The size, in bytes, of ExtraData buffer. + @param[in] ExtraData Pointer to a buffer of extra data. This + parameter is optional and may be NULL. + + @retval RETURN_SUCCESS ResetDataSize and ResetData are updated. + @retval RETURN_INVALID_PARAMETER ResetDataSize is NULL. + @retval RETURN_INVALID_PARAMETER ResetData is NULL. + @retval RETURN_INVALID_PARAMETER ExtraData was provided without a + ResetSubtype. This is not supported by the + UEFI spec. + @retval RETURN_BUFFER_TOO_SMALL An insufficient buffer was provided. + ResetDataSize is updated with minimum size + required. +**/ +RETURN_STATUS +EFIAPI +BuildResetData ( + IN OUT UINTN *ResetDataSize, + IN OUT VOID *ResetData, + IN CONST GUID *ResetSubtype OPTIONAL, + IN CONST CHAR16 *ResetString OPTIONAL, + IN UINTN ExtraDataSize OPTIONAL, + IN CONST VOID *ExtraData OPTIONAL + ); + +#endif // _RESET_UTILITY_LIB_H_ |