MdePkg/Include/Library/UefiRuntimeLib.h

   1 /** @file
   2   Library to abstract runtime services
   3
   4   Copyright (c) 2006, Intel Corporation
   5   All rights reserved. This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #ifndef __UEFI_RUNTIME_LIB__
  16 #define __UEFI_RUNTIME_LIB__
  17
  18
  19 extern const EFI_EVENT_NOTIFY _gDriverExitBootServicesEvent[];
  20
  21 extern const EFI_EVENT_NOTIFY _gDriverSetVirtualAddressMapEvent[];
  22
  23 /**
  24   Check to see if the execute context is in Runtime phase or not.
  25
  26   @param  None.
  27
  28   @retval  TRUE  The driver is in SMM.
  29   @retval  FALSE The driver is not in SMM.
  30
  31 **/
  32 BOOLEAN
  33 EFIAPI
  34 EfiAtRuntime (
  35   VOID
  36   );
  37
  38 /**
  39   Check to see if the SetVirtualAddressMsp() is invoked or not.
  40
  41   @retval  TRUE  SetVirtualAddressMsp() has been called.
  42   @retval  FALSE SetVirtualAddressMsp() has not been called.
  43
  44 **/
  45 BOOLEAN
  46 EFIAPI
  47 EfiGoneVirtual (
  48   VOID
  49   );
  50
  51 /**
  52   Return current time and date information, and time-keeping
  53   capabilities of hardware platform.
  54
  55   @param  Time         A pointer to storage to receive a snapshot of the current time.
  56   @param  Capabilities An optional pointer to a buffer to receive the real time clock device's
  57                        capabilities.
  58
  59   @retval  EFI_SUCCESS  Success to execute the function.
  60   @retval  !EFI_SUCCESS Failed to e3xecute the function.
  61
  62 **/
  63 EFI_STATUS
  64 EFIAPI
  65 EfiGetTime (
  66   OUT EFI_TIME                    *Time,
  67   OUT EFI_TIME_CAPABILITIES       *Capabilities
  68   );
  69
  70 /**
  71   Set current time and date information.
  72
  73   @param  Time         A pointer to cache of time setting.
  74
  75   @retval  EFI_SUCCESS  Success to execute the function.
  76   @retval  !EFI_SUCCESS Failed to execute the function.
  77
  78 **/
  79 EFI_STATUS
  80 EFIAPI
  81 EfiSetTime (
  82   IN EFI_TIME                   *Time
  83   );
  84
  85 /**
  86   Return current wakeup alarm clock setting.
  87
  88   @param  Enabled Indicate if the alarm clock is enabled or disabled.
  89   @param  Pending Indicate if the alarm signal is pending and requires acknowledgement.
  90   @param  Time    Current alarm clock setting.
  91
  92   @retval  EFI_SUCCESS  Success to execute the function.
  93   @retval  !EFI_SUCCESS Failed to e3xecute the function.
  94
  95 **/
  96 EFI_STATUS
  97 EFIAPI
  98 EfiGetWakeupTime (
  99   OUT BOOLEAN                     *Enabled,
 100   OUT BOOLEAN                     *Pending,
 101   OUT EFI_TIME                    *Time
 102   );
 103
 104 /**
 105   Set current wakeup alarm clock.
 106
 107   @param  Enable Enable or disable current alarm clock..
 108   @param  Time   Point to alarm clock setting.
 109
 110   @retval  EFI_SUCCESS  Success to execute the function.
 111   @retval  !EFI_SUCCESS Failed to e3xecute the function.
 112
 113 **/
 114 EFI_STATUS
 115 EFIAPI
 116 EfiSetWakeupTime (
 117   IN BOOLEAN                      Enable,
 118   IN EFI_TIME                     *Time
 119   );
 120
 121 /**
 122   Return value of variable.
 123
 124   @param  VariableName the name of the vendor's variable, it's a
 125                        Null-Terminated Unicode String
 126   @param  VendorGuid   Unify identifier for vendor.
 127   @param  Attributes   Point to memory location to return the attributes of variable. If the point
 128                        is NULL, the parameter would be ignored.
 129   @param  DataSize     As input, point to the maxinum size of return Data-Buffer.
 130                        As output, point to the actual size of the returned Data-Buffer.
 131   @param  Data         Point to return Data-Buffer.
 132
 133   @retval  EFI_SUCCESS  Success to execute the function.
 134   @retval  !EFI_SUCCESS Failed to e3xecute the function.
 135
 136 **/
 137 EFI_STATUS
 138 EFIAPI
 139 EfiGetVariable (
 140   IN      CHAR16                   *VariableName,
 141   IN      EFI_GUID                 *VendorGuid,
 142   OUT     UINT32                   *Attributes,
 143   IN OUT  UINTN                    *DataSize,
 144   OUT     VOID                     *Data
 145   );
 146
 147 /**
 148   Enumerates variable's name.
 149
 150   @param  VariableNameSize As input, point to maxinum size of variable name.
 151                            As output, point to actual size of varaible name.
 152   @param  VariableName     As input, supplies the last VariableName that was returned by
 153                            GetNextVariableName().
 154                            As output, returns the name of variable. The name
 155                            string is Null-Terminated Unicode string.
 156   @param  VendorGuid       As input, supplies the last VendorGuid that was returned by
 157                            GetNextVriableName().
 158                            As output, returns the VendorGuid of the current variable.
 159
 160   @retval  EFI_SUCCESS  Success to execute the function.
 161   @retval  !EFI_SUCCESS Failed to e3xecute the function.
 162
 163 **/
 164 EFI_STATUS
 165 EFIAPI
 166 EfiGetNextVariableName (
 167   IN OUT UINTN                    *VariableNameSize,
 168   IN OUT CHAR16                   *VariableName,
 169   IN OUT EFI_GUID                 *VendorGuid
 170   );
 171
 172 /**
 173   Sets value of variable.
 174
 175   @param  VariableName the name of the vendor's variable, it's a
 176                        Null-Terminated Unicode String
 177   @param  VendorGuid   Unify identifier for vendor.
 178   @param  Attributes   Point to memory location to return the attributes of variable. If the point
 179                        is NULL, the parameter would be ignored.
 180   @param  DataSize     The size in bytes of Data-Buffer.
 181   @param  Data         Point to the content of the variable.
 182
 183   @retval  EFI_SUCCESS  Success to execute the function.
 184   @retval  !EFI_SUCCESS Failed to e3xecute the function.
 185
 186 **/
 187 EFI_STATUS
 188 EFIAPI
 189 EfiSetVariable (
 190   IN CHAR16                       *VariableName,
 191   IN EFI_GUID                     *VendorGuid,
 192   IN UINT32                       Attributes,
 193   IN UINTN                        DataSize,
 194   IN VOID                         *Data
 195   );
 196
 197 /**
 198   Returns the next high 32 bits of platform's monotonic counter.
 199
 200   @param  HighCount Pointer to returned value.
 201
 202   @retval  EFI_SUCCESS  Success to execute the function.
 203   @retval  !EFI_SUCCESS Failed to e3xecute the function.
 204
 205 **/
 206 EFI_STATUS
 207 EFIAPI
 208 EfiGetNextHighMonotonicCount (
 209   OUT UINT32                      *HighCount
 210   );
 211
 212 /**
 213   Resets the entire platform.
 214
 215   @param  ResetType   The type of reset to perform.
 216   @param  ResetStatus The status code for reset.
 217   @param  DataSize    The size in bytes of reset data.
 218   @param  ResetData   Pointer to data buffer that includes
 219                       Null-Terminated Unicode string.
 220
 221 **/
 222 VOID
 223 EfiResetSystem (
 224   IN EFI_RESET_TYPE               ResetType,
 225   IN EFI_STATUS                   ResetStatus,
 226   IN UINTN                        DataSize,
 227   IN CHAR16                       *ResetData
 228   );
 229
 230 /**
 231   Determines the new virtual address that is to be used on subsequent memory accesses.
 232
 233   @param  DebugDisposition   Supplies type information for the pointer being converted.
 234   @param  Address            The pointer to a pointer that is to be fixed to be the
 235                              value needed for the new virtual address mapping being
 236                              applied.
 237
 238   @retval  EFI_SUCCESS  Success to execute the function.
 239   @retval  !EFI_SUCCESS Failed to e3xecute the function.
 240
 241 **/
 242 EFI_STATUS
 243 EFIAPI
 244 EfiConvertPointer (
 245   IN UINTN                  DebugDisposition,
 246   IN OUT VOID               **Address
 247   );
 248
 249
 250 /**
 251   Change the runtime addressing mode of EFI firmware from physical to virtual.
 252
 253   @param  MemoryMapSize         The size in bytes of VirtualMap.
 254   @param  DescriptorSize        The size in bytes of an entry in the VirtualMap.
 255   @param  DescriptorVersion     The version of the structure entries in VirtualMap.
 256   @param  VirtualMap            An array of memory descriptors which contain new virtual
 257                                 address mapping information for all runtime ranges. Type
 258                                 EFI_MEMORY_DESCRIPTOR is defined in the
 259                                 GetMemoryMap() function description.
 260
 261   @retval EFI_SUCCESS           The virtual address map has been applied.
 262   @retval EFI_UNSUPPORTED       EFI firmware is not at runtime, or the EFI firmware is already in
 263                                 virtual address mapped mode.
 264   @retval EFI_INVALID_PARAMETER DescriptorSize or DescriptorVersion is
 265                                 invalid.
 266   @retval EFI_NO_MAPPING        A virtual address was not supplied for a range in the memory
 267                                 map that requires a mapping.
 268   @retval EFI_NOT_FOUND         A virtual address was supplied for an address that is not found
 269                                 in the memory map.
 270 **/
 271 EFI_STATUS
 272 EFIAPI
 273 EfiSetVirtualAddressMap (
 274   IN UINTN                          MemoryMapSize,
 275   IN UINTN                          DescriptorSize,
 276   IN UINT32                         DescriptorVersion,
 277   IN CONST EFI_MEMORY_DESCRIPTOR    *VirtualMap
 278   );
 279
 280
 281 /**
 282   Convert the standard Lib double linked list to a virtual mapping.
 283
 284   @param  DebugDisposition   Supplies type information for the pointer being converted.
 285   @param  ListHead           Head of linked list to convert.
 286
 287   @retval  EFI_SUCCESS  Success to execute the function.
 288   @retval  !EFI_SUCCESS Failed to e3xecute the function.
 289
 290 **/
 291 EFI_STATUS
 292 EFIAPI
 293 EfiConvertList (
 294   IN UINTN                DebugDisposition,
 295   IN OUT LIST_ENTRY       *ListHead
 296   );
 297
 298 /**
 299   Passes capsules to the firmware with both virtual and physical mapping.
 300   Depending on the intended consumption, the firmware may
 301   process the capsule immediately. If the payload should persist across a
 302   system reset, the reset value returned from EFI_QueryCapsuleCapabilities must
 303   be passed into ResetSystem() and will cause the capsule to be processed by
 304   the firmware as part of the reset process.
 305
 306   @param  CapsuleHeaderArray    Virtual pointer to an array of virtual pointers to the capsules
 307                                 being passed into update capsule. Each capsules is assumed to
 308                                 stored in contiguous virtual memory. The capsules in the
 309                                 CapsuleHeaderArray must be the same capsules as the
 310                                 ScatterGatherList. The CapsuleHeaderArray must
 311                                 have the capsules in the same order as the ScatterGatherList.
 312   @param  CapsuleCount          Number of pointers to EFI_CAPSULE_HEADER in
 313                                 CaspuleHeaderArray.
 314   @param  ScatterGatherList     Physical pointer to a set of
 315                                 EFI_CAPSULE_BLOCK_DESCRIPTOR that describes the
 316                                 location in physical memory of a set of capsules. See Related
 317                                 Definitions for an explanation of how more than one capsule is
 318                                 passed via this interface. The capsules in the
 319                                 ScatterGatherList must be in the same order as the
 320                                 CapsuleHeaderArray. This parameter is only referenced if
 321                                 the capsules are defined to persist across system reset.
 322
 323   @retval EFI_SUCCESS           Valid capsule was passed. I Valid capsule was passed. If
 324                                 CAPSULE_FLAGS_PERSIT_ACROSS_RESET is not set, the
 325                                 capsule has been successfully processed by the firmware.
 326   @retval EFI_INVALID_PARAMETER CapsuleSize is NULL or ResetTye is NULL.
 327   @retval EFI_DEVICE_ERROR      The capsule update was started, but failed due to a device error.
 328
 329 **/
 330 EFI_STATUS
 331 EFIAPI
 332 EfiUpdateCapsule (
 333   IN EFI_CAPSULE_HEADER       **CapsuleHeaderArray,
 334   IN UINTN                    CapsuleCount,
 335   IN EFI_PHYSICAL_ADDRESS     ScatterGatherList
 336   );
 337
 338
 339 /**
 340   The QueryCapsuleCapabilities() function allows a caller to test to see if a capsule or
 341   capsules can be updated via UpdateCapsule(). The Flags values in the capsule header and
 342   size of the entire capsule is checked.
 343   If the caller needs to query for generic capsule capability a fake EFI_CAPSULE_HEADER can be
 344   constructed where CapsuleImageSize is equal to HeaderSize that is equal to sizeof
 345   (EFI_CAPSULE_HEADER). To determine reset requirements,
 346   CAPSULE_FLAGS_PERSIST_ACROSS_RESET should be set in the Flags field of the
 347   EFI_CAPSULE_HEADER.
 348   The firmware must support any capsule that has the
 349   CAPSULE_FLAGS_PERSIST_ACROSS_RESET flag set in EFI_CAPSULE_HEADER. The
 350   firmware sets the policy for what capsules are supported that do not have the
 351   CAPSULE_FLAGS_PERSIST_ACROSS_RESET flag set.
 352
 353   @param  CapsuleHeaderArray    Virtual pointer to an array of virtual pointers to the capsules
 354                                 being passed into update capsule. The capsules are assumed to
 355                                 stored in contiguous virtual memory.
 356   @param  CapsuleCount          Number of pointers to EFI_CAPSULE_HEADER in
 357                                 CaspuleHeaderArray.
 358   @param  MaxiumCapsuleSize     On output the maximum size that UpdateCapsule() can
 359                                 support as an argument to UpdateCapsule() via
 360                                 CapsuleHeaderArray and ScatterGatherList.
 361                                 Undefined on input.
 362   @param  ResetType             Returns the type of reset required for the capsule update.
 363
 364   @retval EFI_SUCCESS           Valid answer returned..
 365   @retval EFI_INVALID_PARAMETER MaximumCapsuleSize is NULL.
 366   @retval EFI_UNSUPPORTED       The capsule type is not supported on this platform, and
 367                                 MaximumCapsuleSize and ResetType are undefined.
 368
 369 **/
 370 EFI_STATUS
 371 EFIAPI
 372 EfiQueryCapsuleCapabilities (
 373   IN  EFI_CAPSULE_HEADER       **CapsuleHeaderArray,
 374   IN  UINTN                    CapsuleCount,
 375   OUT UINT64                   *MaximumCapsuleSize,
 376   OUT EFI_RESET_TYPE           *ResetType
 377   );
 378
 379
 380 /**
 381   The QueryVariableInfo() function allows a caller to obtain the information about the
 382   maximum size of the storage space available for the EFI variables, the remaining size of the storage
 383   space available for the EFI variables and the maximum size of each individual EFI variable,
 384   associated with the attributes specified.
 385   The returned MaximumVariableStorageSize, RemainingVariableStorageSize,
 386   MaximumVariableSize information may change immediately after the call based on other
 387   runtime activities including asynchronous error events. Also, these values associated with different
 388   attributes are not additive in nature.
 389
 390   @param  Attributes            Attributes bitmask to specify the type of variables on
 391                                 which to return information. Refer to the
 392                                 GetVariable() function description.
 393   @param  MaximumVariableStorageSize
 394                                 On output the maximum size of the storage space
 395                                 available for the EFI variables associated with the
 396                                 attributes specified.
 397   @param  RemainingVariableStorageSize
 398                                 Returns the remaining size of the storage space
 399                                 available for the EFI variables associated with the
 400                                 attributes specified..
 401   @param  MaximumVariableSize   Returns the maximum size of the individual EFI
 402                                 variables associated with the attributes specified.
 403
 404   @retval EFI_SUCCESS           Valid answer returned.
 405   @retval EFI_INVALID_PARAMETER An invalid combination of attribute bits was supplied.
 406   @retval EFI_UNSUPPORTED       EFI_UNSUPPORTED The attribute is not supported on this platform, and the
 407                                 MaximumVariableStorageSize,
 408                                 RemainingVariableStorageSize, MaximumVariableSize
 409                                 are undefined.
 410 **/
 411 EFI_STATUS
 412 EFIAPI
 413 EfiQueryVariableInfo (
 414   IN UINT32   Attrubutes,
 415   OUT UINT64  *MaximumVariableStorageSize,
 416   OUT UINT64  *RemainingVariableStorageSize,
 417   OUT UINT64  *MaximumVariableSize
 418   );
 419
 420 #endif
 421