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Diffstat (limited to 'src/vendorcode/intel/edk2/UDK2017/MdePkg/Include/Protocol/MmCommunication.h')
-rw-r--r-- | src/vendorcode/intel/edk2/UDK2017/MdePkg/Include/Protocol/MmCommunication.h | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/src/vendorcode/intel/edk2/UDK2017/MdePkg/Include/Protocol/MmCommunication.h b/src/vendorcode/intel/edk2/UDK2017/MdePkg/Include/Protocol/MmCommunication.h new file mode 100644 index 0000000000..db87dd83e4 --- /dev/null +++ b/src/vendorcode/intel/edk2/UDK2017/MdePkg/Include/Protocol/MmCommunication.h @@ -0,0 +1,93 @@ +/** @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> + This program and the accompanying materials + are licensed and made available under the terms and conditions of the BSD License + which accompanies this distribution. The full text of the license may be found at + http://opensource.org/licenses/bsd-license.php + + THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, + WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. + +**/ + +#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 + |