| /** @file |
| EFI MM MP Protocol is defined in the PI 1.5 specification. |
| |
| The MM MP protocol provides a set of functions to allow execution of procedures on processors that |
| have entered MM. This protocol has the following properties: |
| 1. The caller can only invoke execution of a procedure on a processor, other than the caller, that |
| has also entered MM. |
| 2. It is possible to invoke a procedure on multiple processors. Supports blocking and non-blocking |
| modes of operation. |
| |
| Copyright (c) 2019, Intel Corporation. All rights reserved.<BR> |
| SPDX-License-Identifier: BSD-2-Clause-Patent |
| |
| **/ |
| |
| #ifndef _MM_MP_H_ |
| #define _MM_MP_H_ |
| |
| #include <Pi/PiMmCis.h> |
| |
| #define EFI_MM_MP_PROTOCOL_GUID \ |
| { \ |
| 0x5d5450d7, 0x990c, 0x4180, {0xa8, 0x3, 0x8e, 0x63, 0xf0, 0x60, 0x83, 0x7 } \ |
| } |
| |
| // |
| // Revision definition. |
| // |
| #define EFI_MM_MP_PROTOCOL_REVISION 0x00 |
| |
| // |
| // Attribute flags |
| // |
| #define EFI_MM_MP_TIMEOUT_SUPPORTED 0x01 |
| |
| // |
| // Completion token |
| // |
| typedef VOID *MM_COMPLETION; |
| |
| typedef struct { |
| MM_COMPLETION Completion; |
| EFI_STATUS Status; |
| } MM_DISPATCH_COMPLETION_TOKEN; |
| |
| typedef struct _EFI_MM_MP_PROTOCOL EFI_MM_MP_PROTOCOL; |
| |
| /** |
| Service to retrieves the number of logical processor in the platform. |
| |
| @param[in] This The EFI_MM_MP_PROTOCOL instance. |
| @param[out] NumberOfProcessors Pointer to the total number of logical processors in the system, |
| including the BSP and all APs. |
| |
| @retval EFI_SUCCESS The number of processors was retrieved successfully |
| @retval EFI_INVALID_PARAMETER NumberOfProcessors is NULL |
| **/ |
| typedef |
| EFI_STATUS |
| (EFIAPI *EFI_MM_GET_NUMBER_OF_PROCESSORS)( |
| IN CONST EFI_MM_MP_PROTOCOL *This, |
| OUT UINTN *NumberOfProcessors |
| ); |
| |
| /** |
| This service allows the caller to invoke a procedure one of the application processors (AP). This |
| function uses an optional token parameter to support blocking and non-blocking modes. If the token |
| is passed into the call, the function will operate in a non-blocking fashion and the caller can |
| check for completion with CheckOnProcedure or WaitForProcedure. |
| |
| @param[in] This The EFI_MM_MP_PROTOCOL instance. |
| @param[in] Procedure A pointer to the procedure to be run on the designated target |
| AP of the system. Type EFI_AP_PROCEDURE2 is defined below in |
| related definitions. |
| @param[in] CpuNumber The zero-based index of the processor number of the target |
| AP, on which the code stream is supposed to run. If the number |
| points to the calling processor then it will not run the |
| supplied code. |
| @param[in] TimeoutInMicroseconds Indicates the time limit in microseconds for this AP to |
| finish execution of Procedure, either for blocking or |
| non-blocking mode. Zero means infinity. If the timeout |
| expires before this AP returns from Procedure, then Procedure |
| on the AP is terminated. If the timeout expires in blocking |
| mode, the call returns EFI_TIMEOUT. If the timeout expires |
| in non-blocking mode, the timeout determined can be through |
| CheckOnProcedure or WaitForProcedure. |
| Note that timeout support is optional. Whether an |
| implementation supports this feature, can be determined via |
| the Attributes data member. |
| @param[in,out] ProcedureArguments Allows the caller to pass a list of parameters to the code |
| that is run by the AP. It is an optional common mailbox |
| between APs and the caller to share information. |
| @param[in,out] Token This is parameter is broken into two components: |
| 1.Token->Completion is an optional parameter that allows the |
| caller to execute the procedure in a blocking or non-blocking |
| fashion. If it is NULL the call is blocking, and the call will |
| not return until the AP has completed the procedure. If the |
| token is not NULL, the call will return immediately. The caller |
| can check whether the procedure has completed with |
| CheckOnProcedure or WaitForProcedure. |
| 2.Token->Status The implementation updates the address pointed |
| at by this variable with the status code returned by Procedure |
| when it completes execution on the target AP, or with EFI_TIMEOUT |
| if the Procedure fails to complete within the optional timeout. |
| The implementation will update this variable with EFI_NOT_READY |
| prior to starting Procedure on the target AP. |
| @param[in,out] CPUStatus This optional pointer may be used to get the status code returned |
| by Procedure when it completes execution on the target AP, or with |
| EFI_TIMEOUT if the Procedure fails to complete within the optional |
| timeout. The implementation will update this variable with |
| EFI_NOT_READY prior to starting Procedure on the target AP. |
| |
| @retval EFI_SUCCESS In the blocking case, this indicates that Procedure has completed |
| execution on the target AP. |
| In the non-blocking case this indicates that the procedure has |
| been successfully scheduled for execution on the target AP. |
| @retval EFI_INVALID_PARAMETER The input arguments are out of range. Either the target AP is the |
| caller of the function, or the Procedure or Token is NULL |
| @retval EFI_NOT_READY If the target AP is busy executing another procedure |
| @retval EFI_ALREADY_STARTED Token is already in use for another procedure |
| @retval EFI_TIMEOUT In blocking mode, the timeout expired before the specified AP |
| has finished |
| **/ |
| typedef |
| EFI_STATUS |
| (EFIAPI *EFI_MM_DISPATCH_PROCEDURE)( |
| IN CONST EFI_MM_MP_PROTOCOL *This, |
| IN EFI_AP_PROCEDURE2 Procedure, |
| IN UINTN CpuNumber, |
| IN UINTN TimeoutInMicroseconds, |
| IN OUT VOID *ProcedureArguments OPTIONAL, |
| IN OUT MM_COMPLETION *Token, |
| IN OUT EFI_STATUS *CPUStatus |
| ); |
| |
| /** |
| This service allows the caller to invoke a procedure on all running application processors (AP) |
| except the caller. This function uses an optional token parameter to support blocking and |
| nonblocking modes. If the token is passed into the call, the function will operate in a non-blocking |
| fashion and the caller can check for completion with CheckOnProcedure or WaitForProcedure. |
| |
| It is not necessary for the implementation to run the procedure on every processor on the platform. |
| Processors that are powered down in such a way that they cannot respond to interrupts, may be |
| excluded from the broadcast. |
| |
| |
| @param[in] This The EFI_MM_MP_PROTOCOL instance. |
| @param[in] Procedure A pointer to the code stream to be run on the APs that have |
| entered MM. Type EFI_AP_PROCEDURE is defined below in related |
| definitions. |
| @param[in] TimeoutInMicroseconds Indicates the time limit in microseconds for the APs to finish |
| execution of Procedure, either for blocking or non-blocking mode. |
| Zero means infinity. If the timeout expires before all APs return |
| from Procedure, then Procedure on the failed APs is terminated. If |
| the timeout expires in blocking mode, the call returns EFI_TIMEOUT. |
| If the timeout expires in non-blocking mode, the timeout determined |
| can be through CheckOnProcedure or WaitForProcedure. |
| Note that timeout support is optional. Whether an implementation |
| supports this feature can be determined via the Attributes data |
| member. |
| @param[in,out] ProcedureArguments Allows the caller to pass a list of parameters to the code |
| that is run by the AP. It is an optional common mailbox |
| between APs and the caller to share information. |
| @param[in,out] Token This is parameter is broken into two components: |
| 1.Token->Completion is an optional parameter that allows the |
| caller to execute the procedure in a blocking or non-blocking |
| fashion. If it is NULL the call is blocking, and the call will |
| not return until the AP has completed the procedure. If the |
| token is not NULL, the call will return immediately. The caller |
| can check whether the procedure has completed with |
| CheckOnProcedure or WaitForProcedure. |
| 2.Token->Status The implementation updates the address pointed |
| at by this variable with the status code returned by Procedure |
| when it completes execution on the target AP, or with EFI_TIMEOUT |
| if the Procedure fails to complete within the optional timeout. |
| The implementation will update this variable with EFI_NOT_READY |
| prior to starting Procedure on the target AP |
| @param[in,out] CPUStatus This optional pointer may be used to get the individual status |
| returned by every AP that participated in the broadcast. This |
| parameter if used provides the base address of an array to hold |
| the EFI_STATUS value of each AP in the system. The size of the |
| array can be ascertained by the GetNumberOfProcessors function. |
| As mentioned above, the broadcast may not include every processor |
| in the system. Some implementations may exclude processors that |
| have been powered down in such a way that they are not responsive |
| to interrupts. Additionally the broadcast excludes the processor |
| which is making the BroadcastProcedure call. For every excluded |
| processor, the array entry must contain a value of EFI_NOT_STARTED |
| |
| @retval EFI_SUCCESS In the blocking case, this indicates that Procedure has completed |
| execution on the APs. In the non-blocking case this indicates that |
| the procedure has been successfully scheduled for execution on the |
| APs. |
| @retval EFI_INVALID_PARAMETER Procedure or Token is NULL. |
| @retval EFI_NOT_READY If a target AP is busy executing another procedure. |
| @retval EFI_TIMEOUT In blocking mode, the timeout expired before all enabled APs have |
| finished. |
| @retval EFI_ALREADY_STARTED Before the AP procedure associated with the Token is finished, the |
| same Token cannot be used to dispatch or broadcast another procedure. |
| |
| **/ |
| typedef |
| EFI_STATUS |
| (EFIAPI *EFI_MM_BROADCAST_PROCEDURE)( |
| IN CONST EFI_MM_MP_PROTOCOL *This, |
| IN EFI_AP_PROCEDURE2 Procedure, |
| IN UINTN TimeoutInMicroseconds, |
| IN OUT VOID *ProcedureArguments OPTIONAL, |
| IN OUT MM_COMPLETION *Token, |
| IN OUT EFI_STATUS *CPUStatus |
| ); |
| |
| /** |
| This service allows the caller to set a startup procedure that will be executed when an AP powers |
| up from a state where core configuration and context is lost. The procedure is execution has the |
| following properties: |
| 1. The procedure executes before the processor is handed over to the operating system. |
| 2. All processors execute the same startup procedure. |
| 3. The procedure may run in parallel with other procedures invoked through the functions in this |
| protocol, or with processors that are executing an MM handler or running in the operating system. |
| |
| |
| @param[in] This The EFI_MM_MP_PROTOCOL instance. |
| @param[in] Procedure A pointer to the code stream to be run on the designated target AP |
| of the system. Type EFI_AP_PROCEDURE is defined below in Volume 2 |
| with the related definitions of |
| EFI_MP_SERVICES_PROTOCOL.StartupAllAPs. |
| If caller may pass a value of NULL to deregister any existing |
| startup procedure. |
| @param[in,out] ProcedureArguments Allows the caller to pass a list of parameters to the code that is |
| run by the AP. It is an optional common mailbox between APs and |
| the caller to share information |
| |
| @retval EFI_SUCCESS The Procedure has been set successfully. |
| @retval EFI_INVALID_PARAMETER The Procedure is NULL. |
| **/ |
| typedef |
| EFI_STATUS |
| (EFIAPI *EFI_MM_SET_STARTUP_PROCEDURE)( |
| IN CONST EFI_MM_MP_PROTOCOL *This, |
| IN EFI_AP_PROCEDURE Procedure, |
| IN OUT VOID *ProcedureArguments OPTIONAL |
| ); |
| |
| /** |
| When non-blocking execution of a procedure on an AP is invoked with DispatchProcedure, |
| via the use of a token, this function can be used to check for completion of the procedure on the AP. |
| The function takes the token that was passed into the DispatchProcedure call. If the procedure |
| is complete, and therefore it is now possible to run another procedure on the same AP, this function |
| returns EFI_SUCESS. In this case the status returned by the procedure that executed on the AP is |
| returned in the token's Status field. If the procedure has not yet completed, then this function |
| returns EFI_NOT_READY. |
| |
| When a non-blocking execution of a procedure is invoked with BroadcastProcedure, via the |
| use of a token, this function can be used to check for completion of the procedure on all the |
| broadcast APs. The function takes the token that was passed into the BroadcastProcedure |
| call. If the procedure is complete on all broadcast APs this function returns EFI_SUCESS. In this |
| case the Status field in the token passed into the function reflects the overall result of the |
| invocation, which may be EFI_SUCCESS, if all executions succeeded, or the first observed failure. |
| If the procedure has not yet completed on the broadcast APs, the function returns |
| EFI_NOT_READY. |
| |
| @param[in] This The EFI_MM_MP_PROTOCOL instance. |
| @param[in] Token This parameter describes the token that was passed into |
| DispatchProcedure or BroadcastProcedure. |
| |
| @retval EFI_SUCCESS Procedure has completed. |
| @retval EFI_NOT_READY The Procedure has not completed. |
| @retval EFI_INVALID_PARAMETER Token or Token->Completion is NULL |
| @retval EFI_NOT_FOUND Token is not currently in use for a non-blocking call |
| |
| **/ |
| typedef |
| EFI_STATUS |
| (EFIAPI *EFI_CHECK_FOR_PROCEDURE)( |
| IN CONST EFI_MM_MP_PROTOCOL *This, |
| IN MM_COMPLETION Token |
| ); |
| |
| /** |
| When a non-blocking execution of a procedure on an AP is invoked via DispatchProcedure, |
| this function will block the caller until the remote procedure has completed on the designated AP. |
| The non-blocking procedure invocation is identified by the Token parameter, which must match the |
| token that used when DispatchProcedure was called. Upon completion the status returned by |
| the procedure that executed on the AP is used to update the token's Status field. |
| |
| When a non-blocking execution of a procedure on an AP is invoked via BroadcastProcedure |
| this function will block the caller until the remote procedure has completed on all of the APs that |
| entered MM. The non-blocking procedure invocation is identified by the Token parameter, which |
| must match the token that used when BroadcastProcedure was called. Upon completion the |
| overall status returned by the procedures that executed on the broadcast AP is used to update the |
| token's Status field. The overall status may be EFI_SUCCESS, if all executions succeeded, or the |
| first observed failure. |
| |
| |
| @param[in] This The EFI_MM_MP_PROTOCOL instance. |
| @param[in] Token This parameter describes the token that was passed into |
| DispatchProcedure or BroadcastProcedure. |
| |
| @retval EFI_SUCCESS Procedure has completed. |
| @retval EFI_INVALID_PARAMETER Token or Token->Completion is NULL |
| @retval EFI_NOT_FOUND Token is not currently in use for a non-blocking call |
| |
| **/ |
| typedef |
| EFI_STATUS |
| (EFIAPI *EFI_WAIT_FOR_PROCEDURE)( |
| IN CONST EFI_MM_MP_PROTOCOL *This, |
| IN MM_COMPLETION Token |
| ); |
| |
| /// |
| /// The MM MP protocol provides a set of functions to allow execution of procedures on processors that |
| /// have entered MM. |
| /// |
| struct _EFI_MM_MP_PROTOCOL { |
| UINT32 Revision; |
| UINT32 Attributes; |
| EFI_MM_GET_NUMBER_OF_PROCESSORS GetNumberOfProcessors; |
| EFI_MM_DISPATCH_PROCEDURE DispatchProcedure; |
| EFI_MM_BROADCAST_PROCEDURE BroadcastProcedure; |
| EFI_MM_SET_STARTUP_PROCEDURE SetStartupProcedure; |
| EFI_CHECK_FOR_PROCEDURE CheckForProcedure; |
| EFI_WAIT_FOR_PROCEDURE WaitForProcedure; |
| }; |
| |
| extern EFI_GUID gEfiMmMpProtocolGuid; |
| |
| #endif |