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