IntelFrameworkPkg/Include/Protocol/SmmBase.h

   1 /** @file
   2   This file declares SMM Base abstraction protocol.
   3   This protocol is used to install SMM handlers for support of subsequent SMI/PMI activations. This
   4   protocol is available on both IA-32 and Itanium based systems.
   5
   6   The EFI_SMM_BASE_PROTOCOL is a set of services that is exported by a processor device. It is
   7   a required protocol for the platform processor. This protocol can be used in both boot services and
   8   runtime mode. However, only the following member functions need to exist into runtime:
   9   - InSmm()
  10   - Communicate()
  11   This protocol is responsible for registering the handler services. The order in which the handlers are
  12   executed is prescribed only with respect to the MakeLast flag in the RegisterCallback()
  13   service. The driver exports these registration and unregistration services in boot services mode, but
  14   the registered handlers will execute through the preboot and runtime. The only way to change the
  15   behavior of a registered driver after ExitBootServices() has been invoked is to use some
  16   private communication mechanism with the driver to order it to quiesce. This model permits typical
  17   use cases, such as invoking the handler to enter ACPI mode, where the OS loader would make this
  18   call before boot services are terminated. On the other hand, handlers for services such as chipset
  19   workarounds for the century rollover in CMOS should provide commensurate services throughout
  20   preboot and OS runtime.
  21
  22   @par Revision Reference:
  23   This Protocol is defined in Framework of EFI SMM Core Interface Spec
  24   Version 0.9.
  25
  26 Copyright (c) 2007 - 2009, Intel Corporation
  27 All rights reserved. This program and the accompanying materials
  28 are licensed and made available under the terms and conditions of the BSD License
  29 which accompanies this distribution.  The full text of the license may be found at
  30 http://opensource.org/licenses/bsd-license.php
  31
  32 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  33 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  34
  35 **/
  36
  37 #ifndef _SMM_BASE_H_
  38 #define _SMM_BASE_H_
  39
  40 #include <FrameworkSmm.h>
  41
  42 #define EFI_SMM_BASE_PROTOCOL_GUID \
  43   { \
  44     0x1390954D, 0xda95, 0x4227, {0x93, 0x28, 0x72, 0x82, 0xc2, 0x17, 0xda, 0xa8 } \
  45   }
  46
  47 typedef struct _EFI_SMM_BASE_PROTOCOL             EFI_SMM_BASE_PROTOCOL;
  48
  49 //
  50 // SMM Handler Definition
  51 //
  52 #define EFI_HANDLER_SUCCESS         0x0000
  53 #define EFI_HANDLER_CRITICAL_EXIT   0x0001
  54 #define EFI_HANDLER_SOURCE_QUIESCED 0x0002
  55 #define EFI_HANDLER_SOURCE_PENDING  0x0003
  56
  57 /**
  58   Entry Point to Callback service
  59
  60   @param[in]  SmmImageHandle        A handle allocated by the SMM infrastructure code
  61                                     to uniquely designate a specific DXE SMM driver.
  62   @param[in]  CommunicationBuffer   A pointer to a collection of data in memory
  63                                     that will be conveyed from a non-SMM environment into an SMM environment.
  64                                     The buffer must be contiguous, physically mapped, and be a physical address.
  65   @param[in]  SourceSize            The size of the CommunicationBuffer.
  66
  67   @return     Status code
  68
  69 **/
  70 typedef
  71 EFI_STATUS
  72 (EFIAPI *EFI_SMM_CALLBACK_ENTRY_POINT)(
  73   IN EFI_HANDLE             SmmImageHandle,
  74   IN OUT VOID               *CommunicationBuffer OPTIONAL,
  75   IN OUT UINTN              *SourceSize OPTIONAL
  76   );
  77
  78 //
  79 // SMM Base Protocol Definition
  80 //
  81 /**
  82   Register a given driver into SMRAM.This is the equivalent of performing
  83   the LoadImage/StartImage into System Management Mode.
  84
  85   @param[in]   This                  Protocol instance pointer.
  86   @param[in]   FilePath              Location of the image to be installed as the handler.
  87   @param[in]   SourceBuffer          Optional source buffer in case of the image file
  88                                      being in memory.
  89   @param[in]   SourceSize            Size of the source image file, if in memory.
  90   @param[out]  ImageHandle           The handle that the base driver uses to decode
  91                                      the handler. Unique among SMM handlers only,
  92                                      not unique across DXE/EFI.
  93   @param[in]   LegacyIA32Binary      An optional parameter that details that the associated
  94                                      file is a real-mode IA-32 binary.
  95
  96   @retval      EFI_SUCCESS           The operation was successful.
  97   @retval      EFI_OUT_OF_RESOURCES  There were no additional SMRAM resources to load the handler
  98   @retval      EFI_UNSUPPORTED       This platform does not support 16-bit handlers.
  99   @retval      EFI_UNSUPPORTED       In runtime.
 100   @retval      EFI_INVALID_PARAMETER The handlers was not the correct image type
 101
 102 **/
 103 typedef
 104 EFI_STATUS
 105 (EFIAPI *EFI_SMM_REGISTER_HANDLER)(
 106   IN EFI_SMM_BASE_PROTOCOL                           *This,
 107   IN  EFI_DEVICE_PATH_PROTOCOL                       *FilePath,
 108   IN  VOID                                           *SourceBuffer OPTIONAL,
 109   IN  UINTN                                          SourceSize,
 110   OUT EFI_HANDLE                                     *ImageHandle,
 111   IN  BOOLEAN                                        LegacyIA32Binary OPTIONAL
 112   );
 113
 114 /**
 115   Removes a handler from execution within SMRAM.  This is the equivalent of performing
 116   the UnloadImage in System Management Mode.
 117
 118   @param[in]  This                  Protocol instance pointer.
 119   @param[in]  ImageHandle           The handler to be removed.
 120
 121   @retval     EFI_SUCCESS           The operation was successful
 122   @retval     EFI_INVALID_PARAMETER The handler did not exist
 123   @retval     EFI_UNSUPPORTED       In runtime.
 124
 125 **/
 126 typedef
 127 EFI_STATUS
 128 (EFIAPI *EFI_SMM_UNREGISTER_HANDLER)(
 129   IN EFI_SMM_BASE_PROTOCOL          *This,
 130   IN EFI_HANDLE                     ImageHandle
 131   );
 132
 133 /**
 134   The SMM Inter-module Communicate Service Communicate() function
 135   provides a services to send/received messages from a registered
 136   EFI service.  The BASE protocol driver is responsible for doing
 137   any of the copies such that the data lives in boot-service-accessible RAM.
 138
 139   @param[in]      This                  Protocol instance pointer.
 140   @param[in]      ImageHandle           The handle of the registered driver.
 141   @param[in,out]  CommunicationBuffer   Pointer to the buffer to convey into SMRAM.
 142   @param[in,out]  SourceSize            The size of the data buffer being passed in.
 143                                         On exit, the size of data being returned.
 144                                         Zero if the handler does not wish to reply with any data.
 145
 146   @retval         EFI_SUCCESS           The message was successfully posted
 147   @retval         EFI_INVALID_PARAMETER The buffer was NULL
 148
 149 **/
 150 typedef
 151 EFI_STATUS
 152 (EFIAPI *EFI_SMM_COMMUNICATE)(
 153   IN EFI_SMM_BASE_PROTOCOL          *This,
 154   IN EFI_HANDLE                     ImageHandle,
 155   IN OUT VOID                       *CommunicationBuffer,
 156   IN OUT UINTN                      *SourceSize
 157   );
 158
 159 /**
 160   Register a callback to execute within SMM.
 161   This allows receipt of messages created with EFI_SMM_BASE_PROTOCOL.Communicate().
 162
 163   @param[in]  This                  Protocol instance pointer.
 164   @param[in]  SmmImageHandle        Handle of the callback service.
 165   @param[in]  CallbackAddress       Address of the callback service.
 166   @param[in]  MakeLast              If present, will stipulate that the handler is posted to
 167                                     be executed last in the dispatch table.
 168   @param[in]  FloatingPointSave     This is an optional parameter which informs the
 169                                     EFI_SMM_ACCESS_PROTOCOL Driver core if it needs to save
 170                                     the floating point register state. If any of the handlers
 171                                     require this, then the state will be saved for all of the handlers.
 172
 173   @retval     EFI_SUCCESS           The operation was successful
 174   @retval     EFI_OUT_OF_RESOURCES  Not enough space in the dispatch queue
 175   @retval     EFI_UNSUPPORTED       In runtime.
 176   @retval     EFI_UNSUPPORTED       The caller is not in SMM.
 177
 178 **/
 179 typedef
 180 EFI_STATUS
 181 (EFIAPI *EFI_SMM_CALLBACK_SERVICE)(
 182   IN EFI_SMM_BASE_PROTOCOL                            *This,
 183   IN EFI_HANDLE                                       SmmImageHandle,
 184   IN EFI_SMM_CALLBACK_ENTRY_POINT                     CallbackAddress,
 185   IN BOOLEAN                                          MakeLast OPTIONAL,
 186   IN BOOLEAN                                          FloatingPointSave OPTIONAL
 187   );
 188
 189 /**
 190   The SmmAllocatePool() function allocates a memory region of Size bytes from memory of
 191   type PoolType and returns the address of the allocated memory in the location referenced
 192   by Buffer.  This function allocates pages from EFI SMRAM Memory as needed to grow the
 193   requested pool type.  All allocations are eight-byte aligned.
 194
 195   @param[in]   This                  Protocol instance pointer.
 196   @param[in]   PoolType              The type of pool to allocate.
 197                                      The only supported type is EfiRuntimeServicesData;
 198                                      the interface will internally map this runtime request to
 199                                      SMRAM for IA-32 and leave as this type for the Itanium
 200                                      processor family. Other types can be ignored.
 201   @param[in]   Size                  The number of bytes to allocate from the pool.
 202   @param[out]  Buffer                A pointer to a pointer to the allocated buffer if the call
 203                                      succeeds; undefined otherwise.
 204
 205   @retval      EFI_SUCCESS           The requested number of bytes was allocated.
 206   @retval      EFI_OUT_OF_RESOURCES  The pool requested could not be allocated.
 207   @retval      EFI_UNSUPPORTED       In runtime.
 208
 209 **/
 210 typedef
 211 EFI_STATUS
 212 (EFIAPI *EFI_SMM_ALLOCATE_POOL)(
 213   IN EFI_SMM_BASE_PROTOCOL          *This,
 214   IN EFI_MEMORY_TYPE                PoolType,
 215   IN UINTN                          Size,
 216   OUT VOID                          **Buffer
 217   );
 218
 219 /**
 220   The SmmFreePool() function returns the memory specified by Buffer to the system.
 221   On return, the memory's type is EFI SMRAM Memory.  The Buffer that is freed must
 222   have been allocated by SmmAllocatePool().
 223
 224   @param[in]  This                  Protocol instance pointer.
 225   @param[in]  Buffer                Pointer to the buffer allocation.
 226
 227   @retval     EFI_SUCCESS           The memory was returned to the system.
 228   @retval     EFI_INVALID_PARAMETER Buffer was invalid.
 229   @retval     EFI_UNSUPPORTED       In runtime.
 230
 231 **/
 232 typedef
 233 EFI_STATUS
 234 (EFIAPI *EFI_SMM_FREE_POOL)(
 235   IN EFI_SMM_BASE_PROTOCOL          *This,
 236   IN VOID                           *Buffer
 237   );
 238
 239 /**
 240   This routine tells caller if execution context is SMM or not.
 241
 242   @param[in]   This                   Protocol instance pointer.
 243   @param[out]  InSmm                  Whether the caller is inside SMM for IA-32
 244                                       or servicing a PMI for the Itanium processor
 245                                       family.
 246
 247   @retval      EFI_SUCCESS            The operation was successful
 248   @retval      EFI_INVALID_PARAMETER  InSmm was NULL.
 249
 250 **/
 251 typedef
 252 EFI_STATUS
 253 (EFIAPI *EFI_SMM_INSIDE_OUT)(
 254   IN EFI_SMM_BASE_PROTOCOL          *This,
 255   OUT BOOLEAN                       *InSmm
 256   );
 257
 258 /**
 259   The GetSmstLocation() function returns the locatin of the System Management
 260   Service Table.  The use of the API is such that a driver can discover the
 261   location of the SMST in its entry point and then cache it in some driver
 262   global variable so that the SMST can be invoked in subsequent callbacks.
 263
 264   @param[in]  This                  Protocol instance pointer.
 265   @param[in]  Smst                  Pointer to the SMST.
 266
 267   @retval     EFI_SUCCESS           The operation was successful
 268   @retval     EFI_INVALID_PARAMETER Smst was invalid.
 269   @retval     EFI_UNSUPPORTED       Not in SMM.
 270
 271 **/
 272 typedef
 273 EFI_STATUS
 274 (EFIAPI *EFI_SMM_GET_SMST_LOCATION)(
 275   IN EFI_SMM_BASE_PROTOCOL          *This,
 276   IN OUT EFI_SMM_SYSTEM_TABLE       **Smst
 277   );
 278
 279 ///
 280 /// This protocol is used to install SMM handlers for support of subsequent SMI/PMI
 281 /// activations. This protocol is available on both IA-32 and Itanium-based systems.
 282 ///
 283 struct _EFI_SMM_BASE_PROTOCOL {
 284   EFI_SMM_REGISTER_HANDLER    Register;
 285   EFI_SMM_UNREGISTER_HANDLER  UnRegister;
 286   EFI_SMM_COMMUNICATE         Communicate;
 287   EFI_SMM_CALLBACK_SERVICE    RegisterCallback;
 288   EFI_SMM_INSIDE_OUT          InSmm;
 289   EFI_SMM_ALLOCATE_POOL       SmmAllocatePool;
 290   EFI_SMM_FREE_POOL           SmmFreePool;
 291   EFI_SMM_GET_SMST_LOCATION   GetSmstLocation;
 292 };
 293
 294 extern EFI_GUID gEfiSmmBaseProtocolGuid;
 295
 296 #endif