mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-11-29 12:35:53 +01:00
88 lines
3.0 KiB
C
88 lines
3.0 KiB
C
/** @file
|
|
EFI MM Communication Protocol as defined in the PI 1.5 specification.
|
|
|
|
This protocol provides a means of communicating between drivers outside of MM and MMI
|
|
handlers inside of MM.
|
|
|
|
Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
**/
|
|
|
|
#ifndef _MM_COMMUNICATION_H_
|
|
#define _MM_COMMUNICATION_H_
|
|
|
|
#pragma pack(1)
|
|
|
|
///
|
|
/// To avoid confusion in interpreting frames, the communication buffer should always
|
|
/// begin with EFI_MM_COMMUNICATE_HEADER
|
|
///
|
|
typedef struct {
|
|
///
|
|
/// Allows for disambiguation of the message format.
|
|
///
|
|
EFI_GUID HeaderGuid;
|
|
///
|
|
/// Describes the size of Data (in bytes) and does not include the size of the header.
|
|
///
|
|
UINTN MessageLength;
|
|
///
|
|
/// Designates an array of bytes that is MessageLength in size.
|
|
///
|
|
UINT8 Data[1];
|
|
} EFI_MM_COMMUNICATE_HEADER;
|
|
|
|
#pragma pack()
|
|
|
|
#define EFI_MM_COMMUNICATION_PROTOCOL_GUID \
|
|
{ \
|
|
0xc68ed8e2, 0x9dc6, 0x4cbd, { 0x9d, 0x94, 0xdb, 0x65, 0xac, 0xc5, 0xc3, 0x32 } \
|
|
}
|
|
|
|
typedef struct _EFI_MM_COMMUNICATION_PROTOCOL EFI_MM_COMMUNICATION_PROTOCOL;
|
|
|
|
/**
|
|
Communicates with a registered handler.
|
|
|
|
This function provides a service to send and receive messages from a registered UEFI service.
|
|
|
|
@param[in] This The EFI_MM_COMMUNICATION_PROTOCOL instance.
|
|
@param[in] CommBuffer A pointer to the buffer to convey into MMRAM.
|
|
@param[in] CommSize The size of the data buffer being passed in. On exit, the size of data
|
|
being returned. Zero if the handler does not wish to reply with any data.
|
|
This parameter is optional and may be NULL.
|
|
|
|
@retval EFI_SUCCESS The message was successfully posted.
|
|
@retval EFI_INVALID_PARAMETER The CommBuffer was NULL.
|
|
@retval EFI_BAD_BUFFER_SIZE The buffer is too large for the MM implementation.
|
|
If this error is returned, the MessageLength field
|
|
in the CommBuffer header or the integer pointed by
|
|
CommSize, are updated to reflect the maximum payload
|
|
size the implementation can accommodate.
|
|
@retval EFI_ACCESS_DENIED The CommunicateBuffer parameter or CommSize parameter,
|
|
if not omitted, are in address range that cannot be
|
|
accessed by the MM environment.
|
|
|
|
**/
|
|
typedef
|
|
EFI_STATUS
|
|
(EFIAPI *EFI_MM_COMMUNICATE)(
|
|
IN CONST EFI_MM_COMMUNICATION_PROTOCOL *This,
|
|
IN OUT VOID *CommBuffer,
|
|
IN OUT UINTN *CommSize OPTIONAL
|
|
);
|
|
|
|
///
|
|
/// EFI MM Communication Protocol provides runtime services for communicating
|
|
/// between DXE drivers and a registered MMI handler.
|
|
///
|
|
struct _EFI_MM_COMMUNICATION_PROTOCOL {
|
|
EFI_MM_COMMUNICATE Communicate;
|
|
};
|
|
|
|
extern EFI_GUID gEfiMmCommunicationProtocolGuid;
|
|
|
|
#endif
|
|
|