projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 709f55c0 | 1 | /** @file\r |
| 2 | EFI SMM Communication Protocol as defined in the PI 1.2 specification.\r | |
| 3 | \r | |
| 4 | This protocol provides a means of communicating between drivers outside of SMM and SMI \r | |
| 5 | handlers inside of SMM. \r | |
| 6 | \r | |
| 9df063a0 HT |
7 | Copyright (c) 2009, Intel Corporation. All rights reserved.<BR>\r |
| 8 | This program and the accompanying materials \r | |
| 709f55c0 | 9 | are licensed and made available under the terms and conditions of the BSD License \r |
| 10 | which accompanies this distribution. The full text of the license may be found at \r | |
| 11 | http://opensource.org/licenses/bsd-license.php \r | |
| 12 | \r | |
| 13 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
| 14 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
| 15 | \r | |
| 16 | **/\r | |
| 17 | \r | |
| 18 | #ifndef _SMM_COMMUNICATION_H_\r | |
| 19 | #define _SMM_COMMUNICATION_H_\r | |
| 20 | \r | |
| 21 | #define EFI_SMM_COMMUNICATION_PROTOCOL_GUID \\r | |
| 22 | { \\r | |
| 23 | 0xc68ed8e2, 0x9dc6, 0x4cbd, { 0x9d, 0x94, 0xdb, 0x65, 0xac, 0xc5, 0xc3, 0x32 } \\r | |
| 24 | }\r | |
| 25 | \r | |
| 26 | ///\r | |
| 27 | /// To avoid confusion in interpreting frames, the communication buffer should always \r | |
| 28 | /// begin with EFI_SMM_COMMUNICATE_HEADER\r | |
| 29 | ///\r | |
| 30 | typedef struct {\r | |
| 31 | ///\r | |
| 32 | /// Allows for disambiguation of the message format.\r | |
| 33 | ///\r | |
| 34 | EFI_GUID HeaderGuid;\r | |
| 35 | ///\r | |
| 36 | /// Describes the size of Data (in bytes) and does not include the size of the header.\r | |
| 37 | ///\r | |
| 38 | UINTN MessageLength;\r | |
| 39 | ///\r | |
| 40 | /// Designates an array of bytes that is MessageLength in size.\r | |
| 41 | ///\r | |
| 42 | UINT8 Data[1];\r | |
| 43 | } EFI_SMM_COMMUNICATE_HEADER;\r | |
| 44 | \r | |
| 45 | typedef struct _EFI_SMM_COMMUNICATION_PROTOCOL EFI_SMM_COMMUNICATION_PROTOCOL;\r | |
| 46 | \r | |
| 47 | /**\r | |
| 48 | Communicates with a registered handler.\r | |
| 49 | \r | |
| 50 | This function provides a service to send and receive messages from a registered UEFI service.\r | |
| 51 | \r | |
| 52 | @param[in] This The EFI_SMM_COMMUNICATION_PROTOCOL instance.\r | |
| 53 | @param[in] CommBuffer A pointer to the buffer to convey into SMRAM.\r | |
| 54 | @param[in] CommSize The size of the data buffer being passed in.On exit, the size of data\r | |
| 55 | being returned. Zero if the handler does not wish to reply with any data.\r | |
| 56 | \r | |
| 57 | @retval EFI_SUCCESS The message was successfully posted.\r | |
| 58 | @retval EFI_INVALID_PARAMETER The CommBuffer was NULL.\r | |
| 59 | **/\r | |
| 60 | typedef\r | |
| 61 | EFI_STATUS\r | |
| d64527e5 | 62 | (EFIAPI *EFI_SMM_COMMUNICATE2)(\r |
| 709f55c0 | 63 | IN CONST EFI_SMM_COMMUNICATION_PROTOCOL *This,\r |
| 64 | IN OUT VOID *CommBuffer,\r | |
| 65 | IN OUT UINTN *CommSize\r | |
| 66 | );\r | |
| 67 | \r | |
| 68 | ///\r | |
| 69 | /// EFI SMM Communication Protocol provides runtime services for communicating\r | |
| 70 | /// between DXE drivers and a registered SMI handler.\r | |
| 71 | ///\r | |
| 72 | struct _EFI_SMM_COMMUNICATION_PROTOCOL {\r | |
| d64527e5 | 73 | EFI_SMM_COMMUNICATE2 Communicate;\r |
| 709f55c0 | 74 | };\r |
| 75 | \r | |
| 76 | extern EFI_GUID gEfiSmmCommunicationProtocolGuid;\r | |
| 77 | \r | |
| 78 | #endif\r | |
| 79 | \r |