StandaloneMmPkg/Drivers/StandaloneMmCpu/StandaloneMmCpu.h

/** @file
  Private header with declarations and definitions specific to the MM Standalone
  CPU driver

  Copyright (c) 2017 - 2021, Arm Limited. All rights reserved.
  SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#ifndef _ARM_TF_CPU_DRIVER_H_
#define _ARM_TF_CPU_DRIVER_H_

#include <Protocol/MmCommunication2.h>
#include <Protocol/MmConfiguration.h>
#include <Protocol/MmCpu.h>
#include <Guid/MpInformation.h>

//
// CPU driver initialization specific declarations
//
extern EFI_MM_SYSTEM_TABLE *mMmst;

//
// CPU State Save protocol specific declarations
//
extern EFI_MM_CPU_PROTOCOL mMmCpuState;

//
// MM event handling specific declarations
//
extern EFI_MM_COMMUNICATE_HEADER    **PerCpuGuidedEventContext;
extern EFI_MMRAM_DESCRIPTOR          mNsCommBuffer;
extern MP_INFORMATION_HOB_DATA       *mMpInformationHobData;
extern EFI_MM_CONFIGURATION_PROTOCOL mMmConfig;

/**
  The PI Standalone MM entry point for the TF-A CPU driver.

  @param  [in] EventId            The event Id.
  @param  [in] CpuNumber          The CPU number.
  @param  [in] NsCommBufferAddr   Address of the NS common buffer.

  @retval   EFI_SUCCESS             Success.
  @retval   EFI_INVALID_PARAMETER   A parameter was invalid.
  @retval   EFI_ACCESS_DENIED       Access not permitted.
  @retval   EFI_OUT_OF_RESOURCES    Out of resources.
  @retval   EFI_UNSUPPORTED         Operation not supported.
**/
EFI_STATUS
PiMmStandaloneArmTfCpuDriverEntry (
  IN UINTN EventId,
  IN UINTN CpuNumber,
  IN UINTN NsCommBufferAddr
  );

/**
  This function is the main entry point for an MM handler dispatch
  or communicate-based callback.

  @param  DispatchHandle  The unique handle assigned to this handler by
                          MmiHandlerRegister().
  @param  Context         Points to an optional handler context which was
                          specified when the handler was registered.
  @param  CommBuffer      A pointer to a collection of data in memory that will
                          be conveyed from a non-MM environment into an
                          MM environment.
  @param  CommBufferSize  The size of the CommBuffer.

  @return Status Code

**/
EFI_STATUS
EFIAPI
PiMmCpuTpFwRootMmiHandler (
  IN     EFI_HANDLE               DispatchHandle,
  IN     CONST VOID               *Context,        OPTIONAL
  IN OUT VOID                     *CommBuffer,     OPTIONAL
  IN OUT UINTN                    *CommBufferSize  OPTIONAL
  );

#endif