MdePkg/Library/UefiLib/UefiNotTiano.c

   1 /** @file
   2   Library functions that abstract areas of conflict between framework and UEFI 2.0.
   3
   4   Help Port Framework code that has conflicts with UEFI 2.0 by hiding the
   5   old conflicts with library functions and supporting implementations of the old
   6   (EDK/EFI 1.10) and new (EDK II/UEFI 2.0) way. This module is a DXE driver as
   7   it contains DXE enum extensions for EFI event services.
   8
   9 Copyright (c) 2006 - 2008, Intel Corporation<BR>
  10 All rights reserved. This program and the accompanying materials
  11 are licensed and made available under the terms and conditions of the BSD License
  12 which accompanies this distribution.  The full text of the license may be found at
  13 http://opensource.org/licenses/bsd-license.php
  14
  15 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  16 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  17
  18 **/
  19
  20
  21
  22 #include "UefiLibInternal.h"
  23
  24 /**
  25   An empty function to pass error checking of CreateEventEx ().
  26
  27   This empty function ensures that EVT_NOTIFY_SIGNAL_ALL is error
  28   checked correctly since it is now mapped into CreateEventEx() in UEFI 2.0.
  29
  30   @param  Event                 Event whose notification function is being invoked.
  31   @param  Context               Pointer to the notification function's context,
  32                                 which is implementation-dependent.
  33
  34 **/
  35 VOID
  36 EFIAPI
  37 InternalEmptyFuntion (
  38   IN EFI_EVENT                Event,
  39   IN VOID                     *Context
  40   )
  41 {
  42   return;
  43 }
  44
  45 /**
  46   Creates an EFI event in the Legacy Boot Event Group.
  47
  48   Prior to UEFI 2.0 this was done via a non blessed UEFI extensions and this library
  49   abstracts the implementation mechanism of this event from the caller. This function
  50   abstracts the creation of the Legacy Boot Event. The Framework moved from a proprietary
  51   to UEFI 2.0 based mechanism.  This library abstracts the caller from how this event
  52   is created to prevent to code form having to change with the version of the
  53   specification supported.
  54   If LegacyBootEvent is NULL, then ASSERT().
  55
  56   @param  LegacyBootEvent   Returns the EFI event returned from gBS->CreateEvent(Ex).
  57
  58   @retval EFI_SUCCESS       Event was created.
  59   @retval Other             Event was not created.
  60
  61 **/
  62 EFI_STATUS
  63 EFIAPI
  64 EfiCreateEventLegacyBoot (
  65   OUT EFI_EVENT  *LegacyBootEvent
  66   )
  67 {
  68   return EfiCreateEventLegacyBootEx (
  69            TPL_CALLBACK,
  70            InternalEmptyFuntion,
  71            NULL,
  72            LegacyBootEvent
  73            );
  74 }
  75
  76 /**
  77   Create an EFI event in the Legacy Boot Event Group and allows
  78   the caller to specify a notification function.
  79
  80   This function abstracts the creation of the Legacy Boot Event.
  81   The Framework moved from a proprietary to UEFI 2.0 based mechanism.
  82   This library abstracts the caller from how this event is created to prevent
  83   to code form having to change with the version of the specification supported.
  84   If LegacyBootEvent is NULL, then ASSERT().
  85
  86   @param  NotifyTpl         The task priority level of the event.
  87   @param  NotifyFunction    The notification function to call when the event is signaled.
  88   @param  NotifyContext     The content to pass to NotifyFunction when the event is signaled.
  89   @param  LegacyBootEvent   Returns the EFI event returned from gBS->CreateEvent(Ex).
  90
  91   @retval EFI_SUCCESS       Event was created.
  92   @retval Other             Event was not created.
  93
  94 **/
  95 EFI_STATUS
  96 EFIAPI
  97 EfiCreateEventLegacyBootEx (
  98   IN  EFI_TPL           NotifyTpl,
  99   IN  EFI_EVENT_NOTIFY  NotifyFunction,  OPTIONAL
 100   IN  VOID              *NotifyContext,  OPTIONAL
 101   OUT EFI_EVENT         *LegacyBootEvent
 102   )
 103 {
 104   EFI_STATUS    Status;
 105
 106   ASSERT (LegacyBootEvent != NULL);
 107
 108   if (gST->Hdr.Revision < EFI_2_00_SYSTEM_TABLE_REVISION) {
 109     DEBUG ((EFI_D_ERROR, "EFI1.1 can't support LegacyBootEvent!"));
 110     ASSERT (FALSE);
 111
 112     return EFI_UNSUPPORTED;
 113   } else {
 114     //
 115     // For UEFI 2.0 and the future use an Event Group
 116     //
 117     Status = gBS->CreateEventEx (
 118                     EVT_NOTIFY_SIGNAL,
 119                     NotifyTpl,
 120                     NotifyFunction,
 121                     NotifyContext,
 122                     &gEfiEventLegacyBootGuid,
 123                     LegacyBootEvent
 124                     );
 125   }
 126
 127   return Status;
 128 }
 129
 130 /**
 131   Create an EFI event in the Ready To Boot Event Group.
 132
 133   Prior to UEFI 2.0 this was done via a non-standard UEFI extension, and this library
 134   abstracts the implementation mechanism of this event from the caller.
 135   This function abstracts the creation of the Ready to Boot Event.  The Framework
 136   moved from a proprietary to UEFI 2.0-based mechanism.  This library abstracts
 137   the caller from how this event is created to prevent the code form having to
 138   change with the version of the specification supported.
 139   If ReadyToBootEvent is NULL, then ASSERT().
 140
 141   @param  ReadyToBootEvent   Returns the EFI event returned from gBS->CreateEvent(Ex).
 142
 143   @retval EFI_SUCCESS       Event was created.
 144   @retval Other             Event was not created.
 145
 146 **/
 147 EFI_STATUS
 148 EFIAPI
 149 EfiCreateEventReadyToBoot (
 150   OUT EFI_EVENT  *ReadyToBootEvent
 151   )
 152 {
 153   return EfiCreateEventReadyToBootEx (
 154            TPL_CALLBACK,
 155            InternalEmptyFuntion,
 156            NULL,
 157            ReadyToBootEvent
 158            );
 159 }
 160
 161 /**
 162   Create an EFI event in the Ready To Boot Event Group and allows
 163   the caller to specify a notification function.
 164
 165   This function abstracts the creation of the Ready to Boot Event.
 166   The Framework moved from a proprietary to UEFI 2.0 based mechanism.
 167   This library abstracts the caller from how this event is created to prevent
 168   to code form having to change with the version of the specification supported.
 169   If ReadyToBootEvent is NULL, then ASSERT().
 170
 171   @param  NotifyTpl         The task priority level of the event.
 172   @param  NotifyFunction    The notification function to call when the event is signaled.
 173   @param  NotifyContext     The content to pass to NotifyFunction when the event is signaled.
 174   @param  ReadyToBootEvent  Returns the EFI event returned from gBS->CreateEvent(Ex).
 175
 176   @retval EFI_SUCCESS       Event was created.
 177   @retval Other             Event was not created.
 178
 179 **/
 180 EFI_STATUS
 181 EFIAPI
 182 EfiCreateEventReadyToBootEx (
 183   IN  EFI_TPL           NotifyTpl,
 184   IN  EFI_EVENT_NOTIFY  NotifyFunction,  OPTIONAL
 185   IN  VOID              *NotifyContext,  OPTIONAL
 186   OUT EFI_EVENT         *ReadyToBootEvent
 187   )
 188 {
 189   EFI_STATUS    Status;
 190
 191   ASSERT (ReadyToBootEvent != NULL);
 192
 193   if (gST->Hdr.Revision < EFI_2_00_SYSTEM_TABLE_REVISION) {
 194     DEBUG ((EFI_D_ERROR, "EFI1.1 can't support ReadyToBootEvent!"));
 195     ASSERT (FALSE);
 196
 197     return EFI_UNSUPPORTED;
 198   } else {
 199     //
 200     // For UEFI 2.0 and the future use an Event Group
 201     //
 202     Status = gBS->CreateEventEx (
 203                     EVT_NOTIFY_SIGNAL,
 204                     NotifyTpl,
 205                     NotifyFunction,
 206                     NotifyContext,
 207                     &gEfiEventReadyToBootGuid,
 208                     ReadyToBootEvent
 209                     );
 210   }
 211
 212   return Status;
 213 }
 214
 215
 216 /**
 217   Create, Signal, and Close the Ready to Boot event using EfiSignalEventReadyToBoot().
 218
 219   This function abstracts the signaling of the Ready to Boot Event. The Framework moved
 220   from a proprietary to UEFI 2.0 based mechanism. This library abstracts the caller
 221   from how this event is created to prevent to code form having to change with the
 222   version of the specification supported.
 223
 224 **/
 225 VOID
 226 EFIAPI
 227 EfiSignalEventReadyToBoot (
 228   VOID
 229   )
 230 {
 231   EFI_STATUS    Status;
 232   EFI_EVENT     ReadyToBootEvent;
 233
 234   Status = EfiCreateEventReadyToBoot (&ReadyToBootEvent);
 235   if (!EFI_ERROR (Status)) {
 236     gBS->SignalEvent (ReadyToBootEvent);
 237     gBS->CloseEvent (ReadyToBootEvent);
 238   }
 239 }
 240
 241 /**
 242   Create, Signal, and Close the Ready to Boot event using EfiSignalEventLegacyBoot().
 243
 244   This function abstracts the signaling of the Legacy Boot Event. The Framework moved from
 245   a proprietary to UEFI 2.0 based mechanism.  This library abstracts the caller from how
 246   this event is created to prevent to code form having to change with the version of the
 247   specification supported.
 248
 249 **/
 250 VOID
 251 EFIAPI
 252 EfiSignalEventLegacyBoot (
 253   VOID
 254   )
 255 {
 256   EFI_STATUS    Status;
 257   EFI_EVENT     LegacyBootEvent;
 258
 259   Status = EfiCreateEventLegacyBoot (&LegacyBootEvent);
 260   if (!EFI_ERROR (Status)) {
 261     gBS->SignalEvent (LegacyBootEvent);
 262     gBS->CloseEvent (LegacyBootEvent);
 263   }
 264 }
 265
 266
 267 /**
 268   Check to see if the Firmware Volume (FV) Media Device Path is valid
 269
 270   The Framework FwVol Device Path changed to conform to the UEFI 2.0 specification.
 271   This library function abstracts validating a device path node.
 272   Check the MEDIA_FW_VOL_FILEPATH_DEVICE_PATH data structure to see if it's valid.
 273   If it is valid, then return the GUID file name from the device path node.  Otherwise,
 274   return NULL.  This device path changed in the DXE CIS version 0.92 in a non back ward
 275   compatible way to not conflict with the UEFI 2.0 specification.  This function abstracts
 276   the differences from the caller.
 277   If FvDevicePathNode is NULL, then ASSERT().
 278
 279   @param  FvDevicePathNode  Pointer to FV device path to check.
 280
 281   @retval NULL              FvDevicePathNode is not valid.
 282   @retval Other             FvDevicePathNode is valid and pointer to NameGuid was returned.
 283
 284 **/
 285 EFI_GUID *
 286 EFIAPI
 287 EfiGetNameGuidFromFwVolDevicePathNode (
 288   IN CONST MEDIA_FW_VOL_FILEPATH_DEVICE_PATH  *FvDevicePathNode
 289   )
 290 {
 291   ASSERT (FvDevicePathNode != NULL);
 292
 293   if (DevicePathType (&FvDevicePathNode->Header) == MEDIA_DEVICE_PATH &&
 294       DevicePathSubType (&FvDevicePathNode->Header) == MEDIA_PIWG_FW_FILE_DP) {
 295     return (EFI_GUID *) &FvDevicePathNode->FvFileName;
 296   }
 297
 298   return NULL;
 299 }
 300
 301
 302 /**
 303   Initialize a Firmware Volume (FV) Media Device Path node.
 304
 305   The Framework FwVol Device Path changed to conform to the UEFI 2.0 specification.
 306   This library function abstracts initializing a device path node.
 307   Initialize the MEDIA_FW_VOL_FILEPATH_DEVICE_PATH data structure.  This device
 308   path changed in the DXE CIS version 0.92 in a non back ward compatible way to
 309   not conflict with the UEFI 2.0 specification.  This function abstracts the
 310   differences from the caller.
 311   If FvDevicePathNode is NULL, then ASSERT().
 312   If NameGuid is NULL, then ASSERT().
 313
 314   @param  FvDevicePathNode  Pointer to a FV device path node to initialize
 315   @param  NameGuid          FV file name to use in FvDevicePathNode
 316
 317 **/
 318 VOID
 319 EFIAPI
 320 EfiInitializeFwVolDevicepathNode (
 321   IN OUT MEDIA_FW_VOL_FILEPATH_DEVICE_PATH  *FvDevicePathNode,
 322   IN CONST EFI_GUID                         *NameGuid
 323   )
 324 {
 325   ASSERT (FvDevicePathNode != NULL);
 326   ASSERT (NameGuid          != NULL);
 327
 328   //
 329   // Use the new Device path that does not conflict with the UEFI
 330   //
 331   FvDevicePathNode->Header.Type     = MEDIA_DEVICE_PATH;
 332   FvDevicePathNode->Header.SubType  = MEDIA_PIWG_FW_FILE_DP;
 333   SetDevicePathNodeLength (&FvDevicePathNode->Header, sizeof (MEDIA_FW_VOL_FILEPATH_DEVICE_PATH));
 334
 335   CopyGuid (&FvDevicePathNode->FvFileName, NameGuid);
 336 }
 337