text: /** @file
    The internal header file includes the common header files, defines
    internal structure and functions used by MmCore module.
  
    Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved.<BR>
    Copyright (c) 2016 - 2021, Arm Limited. All rights reserved.<BR>
  
    SPDX-License-Identifier: BSD-2-Clause-Patent
  
  **/
  
  #ifndef _MM_CORE_H_
  #define _MM_CORE_H_
  
  #include <PiMm.h>
  #include <StandaloneMm.h>
  
  #include <Protocol/DxeMmReadyToLock.h>
  #include <Protocol/MmReadyToLock.h>
  #include <Protocol/MmEndOfDxe.h>
  #include <Protocol/MmCommunication2.h>
  #include <Protocol/LoadedImage.h>
  #include <Protocol/MmConfiguration.h>
  
  #include <Guid/Apriori.h>
  #include <Guid/EventGroup.h>
  #include <Guid/EventLegacyBios.h>
  #include <Guid/ZeroGuid.h>
  #include <Guid/MemoryProfile.h>
  #include <Guid/HobList.h>
  #include <Guid/MmFvDispatch.h>
  #include <Guid/MmramMemoryReserve.h>
  
  #include <Library/StandaloneMmCoreEntryPoint.h>
  #include <Library/BaseLib.h>
  #include <Library/BaseMemoryLib.h>
  #include <Library/PeCoffLib.h>
  #include <Library/CacheMaintenanceLib.h>
  #include <Library/DebugLib.h>
  #include <Library/ReportStatusCodeLib.h>
  #include <Library/MemoryAllocationLib.h>
  #include <Library/PcdLib.h>
  
  #include <Library/StandaloneMmMemLib.h>
  #include <Library/HobLib.h>
  
  #include "StandaloneMmCorePrivateData.h"
  
  //
  // Used to build a table of MMI Handlers that the MM Core registers
  //
  typedef struct {
    EFI_MM_HANDLER_ENTRY_POINT    Handler;
    EFI_GUID                      *HandlerType;
    EFI_HANDLE                    DispatchHandle;
    BOOLEAN                       UnRegister;
  } MM_CORE_MMI_HANDLERS;
  
  //
  // Structure for recording the state of an MM Driver
  //
  #define EFI_MM_DRIVER_ENTRY_SIGNATURE  SIGNATURE_32('s', 'd','r','v')
  
  typedef struct {
    UINTN                         Signature;
    LIST_ENTRY                    Link;               // mDriverList
  
    LIST_ENTRY                    ScheduledLink;      // mScheduledQueue
  
    EFI_FIRMWARE_VOLUME_HEADER    *FwVolHeader;
    EFI_GUID                      FileName;
    VOID                          *Pe32Data;
    UINTN                         Pe32DataSize;
  
    VOID                          *Depex;
    UINTN                         DepexSize;
  
    BOOLEAN                       Before;
    BOOLEAN                       After;
    EFI_GUID                      BeforeAfterGuid;
  
    BOOLEAN                       Dependent;
    BOOLEAN                       Scheduled;
    BOOLEAN                       Initialized;
    BOOLEAN                       DepexProtocolError;
  
    EFI_HANDLE                    ImageHandle;
    EFI_LOADED_IMAGE_PROTOCOL     *LoadedImage;
    //
    // Image EntryPoint in MMRAM
    //
    PHYSICAL_ADDRESS              ImageEntryPoint;
    //
    // Image Buffer in MMRAM
    //
    PHYSICAL_ADDRESS              ImageBuffer;
    //
    // Image Page Number
    //
    UINTN                         NumberOfPage;
  } EFI_MM_DRIVER_ENTRY;
  
  #define EFI_HANDLE_SIGNATURE  SIGNATURE_32('h','n','d','l')
  
  ///
  /// IHANDLE - contains a list of protocol handles
  ///
  typedef struct {
    UINTN         Signature;
    /// All handles list of IHANDLE
    LIST_ENTRY    AllHandles;
    /// List of PROTOCOL_INTERFACE's for this handle
    LIST_ENTRY    Protocols;
    UINTN         LocateRequest;
  } IHANDLE;
  
  #define ASSERT_IS_HANDLE(a)  ASSERT((a)->Signature == EFI_HANDLE_SIGNATURE)
  
  #define PROTOCOL_ENTRY_SIGNATURE  SIGNATURE_32('p','r','t','e')
  
  ///
  /// PROTOCOL_ENTRY - each different protocol has 1 entry in the protocol
  /// database.  Each handler that supports this protocol is listed, along
  /// with a list of registered notifies.
  ///
  typedef struct {
    UINTN         Signature;
    /// Link Entry inserted to mProtocolDatabase
    LIST_ENTRY    AllEntries;
    /// ID of the protocol
    EFI_GUID      ProtocolID;
    /// All protocol interfaces
    LIST_ENTRY    Protocols;
    /// Registered notification handlers
    LIST_ENTRY    Notify;
  } PROTOCOL_ENTRY;
  
  #define PROTOCOL_INTERFACE_SIGNATURE  SIGNATURE_32('p','i','f','c')
  
  ///
  /// PROTOCOL_INTERFACE - each protocol installed on a handle is tracked
  /// with a protocol interface structure
  ///
  typedef struct {
    UINTN             Signature;
    /// Link on IHANDLE.Protocols
    LIST_ENTRY        Link;
    /// Back pointer
    IHANDLE           *Handle;
    /// Link on PROTOCOL_ENTRY.Protocols
    LIST_ENTRY        ByProtocol;
    /// The protocol ID
    PROTOCOL_ENTRY    *Protocol;
    /// The interface value
    VOID              *Interface;
  } PROTOCOL_INTERFACE;
  
  #define PROTOCOL_NOTIFY_SIGNATURE  SIGNATURE_32('p','r','t','n')
  
  ///
  /// PROTOCOL_NOTIFY - used for each register notification for a protocol
  ///
  typedef struct {
    UINTN               Signature;
    PROTOCOL_ENTRY      *Protocol;
    /// All notifications for this protocol
    LIST_ENTRY          Link;
    /// Notification function
    EFI_MM_NOTIFY_FN    Function;
    /// Last position notified
    LIST_ENTRY          *Position;
  } PROTOCOL_NOTIFY;
  
  //
  // MM Core Global Variables
  //
  extern MM_CORE_PRIVATE_DATA  *gMmCorePrivate;
  extern EFI_MM_SYSTEM_TABLE   gMmCoreMmst;
  extern LIST_ENTRY            gHandleList;
  extern EFI_PHYSICAL_ADDRESS  gLoadModuleAtFixAddressMmramBase;
  
  /**
    Called to initialize the memory service.
  
    @param   MmramRangeCount       Number of MMRAM Regions
    @param   MmramRanges           Pointer to MMRAM Descriptors
  
  **/
  VOID
  MmInitializeMemoryServices (
    IN UINTN                 MmramRangeCount,
    IN EFI_MMRAM_DESCRIPTOR  *MmramRanges
    );
  
  /**
    The MmInstallConfigurationTable() function is used to maintain the list
    of configuration tables that are stored in the System Management System
    Table.  The list is stored as an array of (GUID, Pointer) pairs.  The list
    must be allocated from pool memory with PoolType set to EfiRuntimeServicesData.
  
    @param  SystemTable      A pointer to the MM System Table (SMST).
    @param  Guid             A pointer to the GUID for the entry to add, update, or remove.
    @param  Table            A pointer to the buffer of the table to add.
    @param  TableSize        The size of the table to install.
  
    @retval EFI_SUCCESS           The (Guid, Table) pair was added, updated, or removed.
    @retval EFI_INVALID_PARAMETER Guid is not valid.
    @retval EFI_NOT_FOUND         An attempt was made to delete a non-existent entry.
    @retval EFI_OUT_OF_RESOURCES  There is not enough memory available to complete the operation.
  
  **/
  EFI_STATUS
  EFIAPI
  MmInstallConfigurationTable (
    IN  CONST EFI_MM_SYSTEM_TABLE  *SystemTable,
    IN  CONST EFI_GUID             *Guid,
    IN  VOID                       *Table,
    IN  UINTN                      TableSize
    );
  
  /**
    Wrapper function to MmInstallProtocolInterfaceNotify.  This is the public API which
    Calls the private one which contains a BOOLEAN parameter for notifications
  
    @param  UserHandle             The handle to install the protocol handler on,
                                   or NULL if a new handle is to be allocated
    @param  Protocol               The protocol to add to the handle
    @param  InterfaceType          Indicates whether Interface is supplied in
                                   native form.
    @param  Interface              The interface for the protocol being added
  
    @return Status code
  
  **/
  EFI_STATUS
  EFIAPI
  MmInstallProtocolInterface (
    IN OUT EFI_HANDLE      *UserHandle,
    IN EFI_GUID            *Protocol,
    IN EFI_INTERFACE_TYPE  InterfaceType,
    IN VOID                *Interface
    );
  
  /**
    Allocates pages from the memory map.
  
    @param  Type                   The type of allocation to perform
    @param  MemoryType             The type of memory to turn the allocated pages
                                   into
    @param  NumberOfPages          The number of pages to allocate
    @param  Memory                 A pointer to receive the base allocated memory
                                   address
  
    @retval EFI_INVALID_PARAMETER  Parameters violate checking rules defined in spec.
    @retval EFI_NOT_FOUND          Could not allocate pages match the requirement.
    @retval EFI_OUT_OF_RESOURCES   No enough pages to allocate.
    @retval EFI_SUCCESS            Pages successfully allocated.
  
  **/
  EFI_STATUS
  EFIAPI
  MmAllocatePages (
    IN      EFI_ALLOCATE_TYPE     Type,
    IN      EFI_MEMORY_TYPE       MemoryType,
    IN      UINTN                 NumberOfPages,
    OUT     EFI_PHYSICAL_ADDRESS  *Memory
    );
  
  /**
    Allocates pages from the memory map.
  
    @param  Type                   The type of allocation to perform
    @param  MemoryType             The type of memory to turn the allocated pages
                                   into
    @param  NumberOfPages          The number of pages to allocate
    @param  Memory                 A pointer to receive the base allocated memory
                                   address
  
    @retval EFI_INVALID_PARAMETER  Parameters violate checking rules defined in spec.
    @retval EFI_NOT_FOUND          Could not allocate pages match the requirement.
    @retval EFI_OUT_OF_RESOURCES   No enough pages to allocate.
    @retval EFI_SUCCESS            Pages successfully allocated.
  
  **/
  EFI_STATUS
  EFIAPI
  MmInternalAllocatePages (
    IN      EFI_ALLOCATE_TYPE     Type,
    IN      EFI_MEMORY_TYPE       MemoryType,
    IN      UINTN                 NumberOfPages,
    OUT     EFI_PHYSICAL_ADDRESS  *Memory
    );
  
  /**
    Frees previous allocated pages.
  
    @param  Memory                 Base address of memory being freed
    @param  NumberOfPages          The number of pages to free
  
    @retval EFI_NOT_FOUND          Could not find the entry that covers the range
    @retval EFI_INVALID_PARAMETER  Address not aligned, Address is zero or NumberOfPages is zero.
    @return EFI_SUCCESS            Pages successfully freed.
  
  **/
  EFI_STATUS
  EFIAPI
  MmFreePages (
    IN      EFI_PHYSICAL_ADDRESS  Memory,
    IN      UINTN                 NumberOfPages
    );
  
  /**
    Frees previous allocated pages.
  
    @param  Memory                 Base address of memory being freed
    @param  NumberOfPages          The number of pages to free
  
    @retval EFI_NOT_FOUND          Could not find the entry that covers the range
    @retval EFI_INVALID_PARAMETER  Address not aligned, Address is zero or NumberOfPages is zero.
    @return EFI_SUCCESS            Pages successfully freed.
  
  **/
  EFI_STATUS
  EFIAPI
  MmInternalFreePages (
    IN      EFI_PHYSICAL_ADDRESS  Memory,
    IN      UINTN                 NumberOfPages
    );
  
  /**
    Allocate pool of a particular type.
  
    @param  PoolType               Type of pool to allocate
    @param  Size                   The amount of pool to allocate
    @param  Buffer                 The address to return a pointer to the allocated
                                   pool
  
    @retval EFI_INVALID_PARAMETER  PoolType not valid
    @retval EFI_OUT_OF_RESOURCES   Size exceeds max pool size or allocation failed.
    @retval EFI_SUCCESS            Pool successfully allocated.
  
  **/
  EFI_STATUS
  EFIAPI
  MmAllocatePool (
    IN      EFI_MEMORY_TYPE  PoolType,
    IN      UINTN            Size,
    OUT     VOID             **Buffer
    );
  
  /**
    Allocate pool of a particular type.
  
    @param  PoolType               Type of pool to allocate
    @param  Size                   The amount of pool to allocate
    @param  Buffer                 The address to return a pointer to the allocated
                                   pool
  
    @retval EFI_INVALID_PARAMETER  PoolType not valid
    @retval EFI_OUT_OF_RESOURCES   Size exceeds max pool size or allocation failed.
    @retval EFI_SUCCESS            Pool successfully allocated.
  
  **/
  EFI_STATUS
  EFIAPI
  MmInternalAllocatePool (
    IN      EFI_MEMORY_TYPE  PoolType,
    IN      UINTN            Size,
    OUT     VOID             **Buffer
    );
  
  /**
    Frees pool.
  
    @param  Buffer                 The allocated pool entry to free
  
    @retval EFI_INVALID_PARAMETER  Buffer is not a valid value.
    @retval EFI_SUCCESS            Pool successfully freed.
  
  **/
  EFI_STATUS
  EFIAPI
  MmFreePool (
    IN      VOID  *Buffer
    );
  
  /**
    Frees pool.
  
    @param  Buffer                 The allocated pool entry to free
  
    @retval EFI_INVALID_PARAMETER  Buffer is not a valid value.
    @retval EFI_SUCCESS            Pool successfully freed.
  
  **/
  EFI_STATUS
  EFIAPI
  MmInternalFreePool (
    IN      VOID  *Buffer
    );
  
  /**
    Installs a protocol interface into the boot services environment.
  
    @param  UserHandle             The handle to install the protocol handler on,
                                   or NULL if a new handle is to be allocated
    @param  Protocol               The protocol to add to the handle
    @param  InterfaceType          Indicates whether Interface is supplied in
                                   native form.
    @param  Interface              The interface for the protocol being added
    @param  Notify                 indicates whether notify the notification list
                                   for this protocol
  
    @retval EFI_INVALID_PARAMETER  Invalid parameter
    @retval EFI_OUT_OF_RESOURCES   No enough buffer to allocate
    @retval EFI_SUCCESS            Protocol interface successfully installed
  
  **/
  EFI_STATUS
  MmInstallProtocolInterfaceNotify (
    IN OUT EFI_HANDLE      *UserHandle,
    IN EFI_GUID            *Protocol,
    IN EFI_INTERFACE_TYPE  InterfaceType,
    IN VOID                *Interface,
    IN BOOLEAN             Notify
    );
  
  /**
    Uninstalls all instances of a protocol:interfacer from a handle.
    If the last protocol interface is remove from the handle, the
    handle is freed.
  
    @param  UserHandle             The handle to remove the protocol handler from
    @param  Protocol               The protocol, of protocol:interface, to remove
    @param  Interface              The interface, of protocol:interface, to remove
  
    @retval EFI_INVALID_PARAMETER  Protocol is NULL.
    @retval EFI_SUCCESS            Protocol interface successfully uninstalled.
  
  **/
  EFI_STATUS
  EFIAPI
  MmUninstallProtocolInterface (
    IN EFI_HANDLE  UserHandle,
    IN EFI_GUID    *Protocol,
    IN VOID        *Interface
    );
  
  /**
    Queries a handle to determine if it supports a specified protocol.
  
    @param  UserHandle             The handle being queried.
    @param  Protocol               The published unique identifier of the protocol.
    @param  Interface              Supplies the address where a pointer to the
                                   corresponding Protocol Interface is returned.
  
    @return The requested protocol interface for the handle
  
  **/
  EFI_STATUS
  EFIAPI
  MmHandleProtocol (
    IN EFI_HANDLE  UserHandle,
    IN EFI_GUID    *Protocol,
    OUT VOID       **Interface
    );
  
  /**
    Add a new protocol notification record for the request protocol.
  
    @param  Protocol               The requested protocol to add the notify
                                   registration
    @param  Function               Points to the notification function
    @param  Registration           Returns the registration record
  
    @retval EFI_INVALID_PARAMETER  Invalid parameter
    @retval EFI_SUCCESS            Successfully returned the registration record
                                   that has been added
  
  **/
  EFI_STATUS
  EFIAPI
  MmRegisterProtocolNotify (
    IN  CONST EFI_GUID    *Protocol,
    IN  EFI_MM_NOTIFY_FN  Function,
    OUT VOID              **Registration
    );
  
  /**
    Locates the requested handle(s) and returns them in Buffer.
  
    @param  SearchType             The type of search to perform to locate the
                                   handles
    @param  Protocol               The protocol to search for
    @param  SearchKey              Dependant on SearchType
    @param  BufferSize             On input the size of Buffer.  On output the
                                   size of data returned.
    @param  Buffer                 The buffer to return the results in
  
    @retval EFI_BUFFER_TOO_SMALL   Buffer too small, required buffer size is
                                   returned in BufferSize.
    @retval EFI_INVALID_PARAMETER  Invalid parameter
    @retval EFI_SUCCESS            Successfully found the requested handle(s) and
                                   returns them in Buffer.
  
  **/
  EFI_STATUS
  EFIAPI
  MmLocateHandle (
    IN EFI_LOCATE_SEARCH_TYPE  SearchType,
    IN EFI_GUID                *Protocol   OPTIONAL,
    IN VOID                    *SearchKey  OPTIONAL,
    IN OUT UINTN               *BufferSize,
    OUT EFI_HANDLE             *Buffer
    );
  
  /**
    Return the first Protocol Interface that matches the Protocol GUID. If
    Registration is passed in return a Protocol Instance that was just add
    to the system. If Registration is NULL return the first Protocol Interface
    you find.
  
    @param  Protocol               The protocol to search for
    @param  Registration           Optional Registration Key returned from
                                   RegisterProtocolNotify()
    @param  Interface              Return the Protocol interface (instance).
  
    @retval EFI_SUCCESS            If a valid Interface is returned
    @retval EFI_INVALID_PARAMETER  Invalid parameter
    @retval EFI_NOT_FOUND          Protocol interface not found
  
  **/
  EFI_STATUS
  EFIAPI
  MmLocateProtocol (
    IN  EFI_GUID  *Protocol,
    IN  VOID      *Registration OPTIONAL,
    OUT VOID      **Interface
    );
  
  /**
    Manage MMI of a particular type.
  
    @param  HandlerType    Points to the handler type or NULL for root MMI handlers.
    @param  Context        Points to an optional context buffer.
    @param  CommBuffer     Points to the optional communication buffer.
    @param  CommBufferSize Points to the size of the optional communication buffer.
  
    @retval EFI_SUCCESS                        Interrupt source was processed successfully but not quiesced.
    @retval EFI_INTERRUPT_PENDING              One or more MMI sources could not be quiesced.
    @retval EFI_WARN_INTERRUPT_SOURCE_PENDING  Interrupt source was not handled or quiesced.
    @retval EFI_WARN_INTERRUPT_SOURCE_QUIESCED Interrupt source was handled and quiesced.
  
  **/
  EFI_STATUS
  EFIAPI
  MmiManage (
    IN     CONST EFI_GUID  *HandlerType,
    IN     CONST VOID      *Context         OPTIONAL,
    IN OUT VOID            *CommBuffer      OPTIONAL,
    IN OUT UINTN           *CommBufferSize  OPTIONAL
    );
  
  /**
    Registers a handler to execute within MM.
  
    @param  Handler        Handler service function pointer.
    @param  HandlerType    Points to the handler type or NULL for root MMI handlers.
    @param  DispatchHandle On return, contains a unique handle which can be used to later unregister the handler function.
  
    @retval EFI_SUCCESS           Handler register success.
    @retval EFI_INVALID_PARAMETER Handler or DispatchHandle is NULL.
  
  **/
  EFI_STATUS
  EFIAPI
  MmiHandlerRegister (
    IN   EFI_MM_HANDLER_ENTRY_POINT  Handler,
    IN   CONST EFI_GUID              *HandlerType  OPTIONAL,
    OUT  EFI_HANDLE                  *DispatchHandle
    );
  
  /**
    Unregister a handler in MM.
  
    @param  DispatchHandle  The handle that was specified when the handler was registered.
  
    @retval EFI_SUCCESS           Handler function was successfully unregistered.
    @retval EFI_INVALID_PARAMETER DispatchHandle does not refer to a valid handle.
  
  **/
  EFI_STATUS
  EFIAPI
  MmiHandlerUnRegister (
    IN  EFI_HANDLE  DispatchHandle
    );
  
  /**
    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
  MmDriverDispatchHandler (
    IN     EFI_HANDLE  DispatchHandle,
    IN     CONST VOID  *Context         OPTIONAL,
    IN OUT VOID        *CommBuffer      OPTIONAL,
    IN OUT UINTN       *CommBufferSize  OPTIONAL
    );
  
  /**
    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
  MmExitBootServiceHandler (
    IN     EFI_HANDLE  DispatchHandle,
    IN     CONST VOID  *Context         OPTIONAL,
    IN OUT VOID        *CommBuffer      OPTIONAL,
    IN OUT UINTN       *CommBufferSize  OPTIONAL
    );
  
  /**
    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
  MmReadyToBootHandler (
    IN     EFI_HANDLE  DispatchHandle,
    IN     CONST VOID  *Context         OPTIONAL,
    IN OUT VOID        *CommBuffer      OPTIONAL,
    IN OUT UINTN       *CommBufferSize  OPTIONAL
    );
  
  /**
    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
  MmReadyToLockHandler (
    IN     EFI_HANDLE  DispatchHandle,
    IN     CONST VOID  *Context         OPTIONAL,
    IN OUT VOID        *CommBuffer      OPTIONAL,
    IN OUT UINTN       *CommBufferSize  OPTIONAL
    );
  
  /**
    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
  MmEndOfDxeHandler (
    IN     EFI_HANDLE  DispatchHandle,
    IN     CONST VOID  *Context         OPTIONAL,
    IN OUT VOID        *CommBuffer      OPTIONAL,
    IN OUT UINTN       *CommBufferSize  OPTIONAL
    );
  
  /**
    Place holder function until all the MM System Table Service are available.
  
    @param  Arg1                   Undefined
    @param  Arg2                   Undefined
    @param  Arg3                   Undefined
    @param  Arg4                   Undefined
    @param  Arg5                   Undefined
  
    @return EFI_NOT_AVAILABLE_YET
  
  **/
  EFI_STATUS
  EFIAPI
  MmEfiNotAvailableYetArg5 (
    UINTN  Arg1,
    UINTN  Arg2,
    UINTN  Arg3,
    UINTN  Arg4,
    UINTN  Arg5
    );
  
  //
  // Functions used during debug builds
  //
  
  /**
    Traverse the discovered list for any drivers that were discovered but not loaded
    because the dependency expressions evaluated to false.
  
  **/
  VOID
  MmDisplayDiscoveredNotDispatched (
    VOID
    );
  
  /**
    Add free MMRAM region for use by memory service.
  
    @param  MemBase                Base address of memory region.
    @param  MemLength              Length of the memory region.
    @param  Type                   Memory type.
    @param  Attributes             Memory region state.
  
  **/
  VOID
  MmAddMemoryRegion (
    IN      EFI_PHYSICAL_ADDRESS  MemBase,
    IN      UINT64                MemLength,
    IN      EFI_MEMORY_TYPE       Type,
    IN      UINT64                Attributes
    );
  
  /**
    Finds the protocol entry for the requested protocol.
  
    @param  Protocol               The ID of the protocol
    @param  Create                 Create a new entry if not found
  
    @return Protocol entry
  
  **/
  PROTOCOL_ENTRY  *
  MmFindProtocolEntry (
    IN EFI_GUID  *Protocol,
    IN BOOLEAN   Create
    );
  
  /**
    Signal event for every protocol in protocol entry.
  
    @param  Prot                   Protocol interface
  
  **/
  VOID
  MmNotifyProtocol (
    IN PROTOCOL_INTERFACE  *Prot
    );
  
  /**
    Finds the protocol instance for the requested handle and protocol.
    Note: This function doesn't do parameters checking, it's caller's responsibility
    to pass in valid parameters.
  
    @param  Handle                 The handle to search the protocol on
    @param  Protocol               GUID of the protocol
    @param  Interface              The interface for the protocol being searched
  
    @return Protocol instance (NULL: Not found)
  
  **/
  PROTOCOL_INTERFACE *
  MmFindProtocolInterface (
    IN IHANDLE   *Handle,
    IN EFI_GUID  *Protocol,
    IN VOID      *Interface
    );
  
  /**
    Removes Protocol from the protocol list (but not the handle list).
  
    @param  Handle                 The handle to remove protocol on.
    @param  Protocol               GUID of the protocol to be moved
    @param  Interface              The interface of the protocol
  
    @return Protocol Entry
  
  **/
  PROTOCOL_INTERFACE *
  MmRemoveInterfaceFromProtocol (
    IN IHANDLE   *Handle,
    IN EFI_GUID  *Protocol,
    IN VOID      *Interface
    );
  
  /**
    This is the POSTFIX version of the dependency evaluator.  This code does
    not need to handle Before or After, as it is not valid to call this
    routine in this case. POSTFIX means all the math is done on top of the stack.
  
    @param  DriverEntry           DriverEntry element to update.
  
    @retval TRUE                  If driver is ready to run.
    @retval FALSE                 If driver is not ready to run or some fatal error
                                  was found.
  
  **/
  BOOLEAN
  MmIsSchedulable (
    IN  EFI_MM_DRIVER_ENTRY  *DriverEntry
    );
  
  /**
    Dump MMRAM information.
  
  **/
  VOID
  DumpMmramInfo (
    VOID
    );
  
  extern UINTN                 mMmramRangeCount;
  extern EFI_MMRAM_DESCRIPTOR  *mMmramRanges;
  extern EFI_SYSTEM_TABLE      *mEfiSystemTable;
  
  #endif
  