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/** @file
Include file for SMM CPU Services protocol implementation.
Copyright (c) 2011 - 2015, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef _CPU_SERVICE_H_
#define _CPU_SERVICE_H_
typedef enum {
SmmCpuNone,
SmmCpuAdd,
SmmCpuRemove,
SmmCpuSwitchBsp
} SMM_CPU_OPERATION;
//
// SMM CPU Service Protocol function prototypes.
//
/**
Gets processor information on the requested processor at the instant this call is made.
@param[in] This A pointer to the EFI_SMM_CPU_SERVICE_PROTOCOL instance.
@param[in] ProcessorNumber The handle number of processor.
@param[out] ProcessorInfoBuffer A pointer to the buffer where information for
the requested processor is deposited.
@retval EFI_SUCCESS Processor information was returned.
@retval EFI_INVALID_PARAMETER ProcessorInfoBuffer is NULL.
@retval EFI_INVALID_PARAMETER ProcessorNumber is invalid.
@retval EFI_NOT_FOUND The processor with the handle specified by
ProcessorNumber does not exist in the platform.
**/
EFI_STATUS
EFIAPI
SmmGetProcessorInfo (
IN CONST EFI_SMM_CPU_SERVICE_PROTOCOL *This,
IN UINTN ProcessorNumber,
OUT EFI_PROCESSOR_INFORMATION *ProcessorInfoBuffer
);
/**
This service switches the requested AP to be the BSP since the next SMI.
@param[in] This A pointer to the EFI_SMM_CPU_SERVICE_PROTOCOL instance.
@param[in] ProcessorNumber The handle number of AP that is to become the new BSP.
@retval EFI_SUCCESS BSP will be switched in next SMI.
@retval EFI_UNSUPPORTED Switching the BSP or a processor to be hot-removed is not supported.
@retval EFI_NOT_FOUND The processor with the handle specified by ProcessorNumber does not exist.
@retval EFI_INVALID_PARAMETER ProcessorNumber is invalid.
**/
EFI_STATUS
EFIAPI
SmmSwitchBsp (
IN CONST EFI_SMM_CPU_SERVICE_PROTOCOL *This,
IN UINTN ProcessorNumber
);
/**
Notify that a processor was hot-added.
@param[in] This A pointer to the EFI_SMM_CPU_SERVICE_PROTOCOL instance.
@param[in] ProcessorId Local APIC ID of the hot-added processor.
@param[out] ProcessorNumber The handle number of the hot-added processor.
@retval EFI_SUCCESS The hot-addition of the specified processors was successfully notified.
@retval EFI_UNSUPPORTED Hot addition of processor is not supported.
@retval EFI_NOT_FOUND The processor with the handle specified by ProcessorNumber does not exist.
@retval EFI_INVALID_PARAMETER ProcessorNumber is invalid.
@retval EFI_ALREADY_STARTED The processor is already online in the system.
**/
EFI_STATUS
EFIAPI
SmmAddProcessor (
IN CONST EFI_SMM_CPU_SERVICE_PROTOCOL *This,
IN UINT64 ProcessorId,
OUT UINTN *ProcessorNumber
);
/**
Notify that a processor was hot-removed.
@param[in] This A pointer to the EFI_SMM_CPU_SERVICE_PROTOCOL instance.
@param[in] ProcessorNumber The handle number of the hot-added processor.
@retval EFI_SUCCESS The hot-removal of the specified processors was successfully notified.
@retval EFI_UNSUPPORTED Hot removal of processor is not supported.
@retval EFI_UNSUPPORTED Hot removal of BSP is not supported.
@retval EFI_UNSUPPORTED Hot removal of a processor with pending hot-plug operation is not supported.
@retval EFI_INVALID_PARAMETER ProcessorNumber is invalid.
**/
EFI_STATUS
EFIAPI
SmmRemoveProcessor (
IN CONST EFI_SMM_CPU_SERVICE_PROTOCOL *This,
IN UINTN ProcessorNumber
);
/**
This return the handle number for the calling processor.
@param[in] This A pointer to the EFI_SMM_CPU_SERVICE_PROTOCOL instance.
@param[out] ProcessorNumber The handle number of currently executing processor.
@retval EFI_SUCCESS The current processor handle number was returned
in ProcessorNumber.
@retval EFI_INVALID_PARAMETER ProcessorNumber is NULL.
**/
EFI_STATUS
EFIAPI
SmmWhoAmI (
IN CONST EFI_SMM_CPU_SERVICE_PROTOCOL *This,
OUT UINTN *ProcessorNumber
);
/**
Register exception handler.
@param This A pointer to the SMM_CPU_SERVICE_PROTOCOL instance.
@param ExceptionType Defines which interrupt or exception to hook. Type EFI_EXCEPTION_TYPE and
the valid values for this parameter are defined in EFI_DEBUG_SUPPORT_PROTOCOL
of the UEFI 2.0 specification.
@param InterruptHandler A pointer to a function of type EFI_CPU_INTERRUPT_HANDLER
that is called when a processor interrupt occurs.
If this parameter is NULL, then the handler will be uninstalled.
@retval EFI_SUCCESS The handler for the processor interrupt was successfully installed or uninstalled.
@retval EFI_ALREADY_STARTED InterruptHandler is not NULL, and a handler for InterruptType was previously installed.
@retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for InterruptType was not previously installed.
@retval EFI_UNSUPPORTED The interrupt specified by InterruptType is not supported.
**/
EFI_STATUS
EFIAPI
SmmRegisterExceptionHandler (
IN EFI_SMM_CPU_SERVICE_PROTOCOL *This,
IN EFI_EXCEPTION_TYPE ExceptionType,
IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler
);
//
// Internal function prototypes
//
/**
Update the SMM CPU list per the pending operation.
This function is called after return from SMI handlers.
**/
VOID
SmmCpuUpdate (
VOID
);
/**
Initialize SMM CPU Services.
It installs EFI SMM CPU Services Protocol.
@param ImageHandle The firmware allocated handle for the EFI image.
@retval EFI_SUCCESS EFI SMM CPU Services Protocol was installed successfully.
**/
EFI_STATUS
InitializeSmmCpuServices (
IN EFI_HANDLE Handle
);
#endif
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