audk/MdePkg/Include/Protocol/Runtime.h

/** @file
  Runtime Architectural Protocol as defined in PI Specification VOLUME 2 DXE

  This code is used to produce the UEFI 2.0 runtime virtual switch over

  This driver must add SetVirtualAddressMap () and ConvertPointer () to
  the EFI system table. This driver is not responcible for CRCing the 
  EFI system table.

  This driver will add EFI_RUNTIME_ARCH_PROTOCOL_GUID protocol with a 
  pointer to the Runtime Arch Protocol instance structure. The protocol
  member functions are used by the DXE core to export information need
  by this driver to produce the runtime transition to virtual mode
  calling.

  Copyright (c) 2006 - 2008, Intel Corporation                                                         
  All rights reserved. This program and the accompanying materials                          
  are licensed and made available under the terms and conditions of the BSD License         
  which accompanies this distribution.  The full text of the license may be found at        
  http://opensource.org/licenses/bsd-license.php                                            

  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             

**/

#ifndef __ARCH_PROTOCOL_RUNTIME_H__
#define __ARCH_PROTOCOL_RUNTIME_H__

///
/// Global ID for the Runtime Architectural Protocol
///
#define EFI_RUNTIME_ARCH_PROTOCOL_GUID \
  { 0xb7dfb4e1, 0x52f, 0x449f, {0x87, 0xbe, 0x98, 0x18, 0xfc, 0x91, 0xb7, 0x33 } }

typedef struct _EFI_RUNTIME_ARCH_PROTOCOL  EFI_RUNTIME_ARCH_PROTOCOL;

///
/// LIST_ENTRY from BaseType 
///
typedef LIST_ENTRY EFI_LIST_ENTRY;

typedef struct _EFI_RUNTIME_IMAGE_ENTRY  EFI_RUNTIME_IMAGE_ENTRY;

struct _EFI_RUNTIME_IMAGE_ENTRY {
  VOID                    *ImageBase;
  UINT64                  ImageSize;
  VOID                    *RelocationData;
  EFI_HANDLE              Handle;
  EFI_LIST_ENTRY          Link;
};

typedef struct _EFI_RUNTIME_EVENT_ENTRY  EFI_RUNTIME_EVENT_ENTRY;

struct _EFI_RUNTIME_EVENT_ENTRY {
  UINT32                  Type;
  EFI_TPL                 NotifyTpl;
  EFI_EVENT_NOTIFY        NotifyFunction;
  VOID                    *NotifyContext;
  EFI_EVENT               *Event;
  EFI_LIST_ENTRY          Link;
};

//
// Interface stucture for the Runtime Architectural Protocol
//
/**
  @par Protocol Description:
  Allows the runtime functionality of the DXE Foundation to be contained in a 
  separate driver. It also provides hooks for the DXE Foundation to export 
  information that is needed at runtime. As such, this protocol allows the DXE 
  Foundation to manage runtime drivers and events. This protocol also implies 
  that the runtime services required to transition to virtual mode, 
  SetVirtualAddressMap() and ConvertPointer(), have been registered into the 
  EFI Runtime Table in the EFI System Partition.  This protocol must be produced 
  by a runtime DXE driver and may only be consumed by the DXE Foundation.
**/
struct _EFI_RUNTIME_ARCH_PROTOCOL {
  ///
  /// A list of type EFI_RUNTIME_IMAGE_ENTRY.
  ///
  EFI_LIST_ENTRY          ImageHead;
  
  ///
  /// A list of type EFI_RUNTIME_EVENT_ENTRY.
  ///
  EFI_LIST_ENTRY          EventHead;
  
  ///
  /// Size of a memory descriptor that is return by GetMemoryMap().
  ///
  UINTN                   MemoryDescriptorSize;
  
  ///
  /// Version of a memory descriptor that is return by GetMemoryMap().
  ///
  UINT32                  MemoryDesciptorVersion;
  
  ///
  /// Size of the memory map in bytes contained in MemoryMapPhysical and MemoryMapVirtual. 
  ///
  UINTN                   MemoryMapSize;
  
  ///
  /// Pointer to a runtime buffer that contains a copy of 
  /// the memory map returned via GetMemoryMap().
  ///
  EFI_MEMORY_DESCRIPTOR   *MemoryMapPhysical;
  
  ///
  /// Pointer to MemoryMapPhysical that is updated to virtual mode after SetVirtualAddressMap().
  ///
  EFI_MEMORY_DESCRIPTOR   *MemoryMapVirtual;
  
  ///
  /// Boolean that is TRUE if SetVirtualAddressMap() has been called.
  ///
  BOOLEAN                 VirtualMode;
  
  ///
  /// Boolean that is TRUE if ExitBootServices () has been called.
  ///
  BOOLEAN                 AtRuntime;
};

extern EFI_GUID gEfiRuntimeArchProtocolGuid;

#endif