utosi.c revision 1.2.2.2
1 1.2.2.2 bouyer /****************************************************************************** 2 1.2.2.2 bouyer * 3 1.2.2.2 bouyer * Module Name: utosi - Support for the _OSI predefined control method 4 1.2.2.2 bouyer * 5 1.2.2.2 bouyer *****************************************************************************/ 6 1.2.2.2 bouyer 7 1.2.2.2 bouyer /* 8 1.2.2.2 bouyer * Copyright (C) 2000 - 2011, Intel Corp. 9 1.2.2.2 bouyer * All rights reserved. 10 1.2.2.2 bouyer * 11 1.2.2.2 bouyer * Redistribution and use in source and binary forms, with or without 12 1.2.2.2 bouyer * modification, are permitted provided that the following conditions 13 1.2.2.2 bouyer * are met: 14 1.2.2.2 bouyer * 1. Redistributions of source code must retain the above copyright 15 1.2.2.2 bouyer * notice, this list of conditions, and the following disclaimer, 16 1.2.2.2 bouyer * without modification. 17 1.2.2.2 bouyer * 2. Redistributions in binary form must reproduce at minimum a disclaimer 18 1.2.2.2 bouyer * substantially similar to the "NO WARRANTY" disclaimer below 19 1.2.2.2 bouyer * ("Disclaimer") and any redistribution must be conditioned upon 20 1.2.2.2 bouyer * including a substantially similar Disclaimer requirement for further 21 1.2.2.2 bouyer * binary redistribution. 22 1.2.2.2 bouyer * 3. Neither the names of the above-listed copyright holders nor the names 23 1.2.2.2 bouyer * of any contributors may be used to endorse or promote products derived 24 1.2.2.2 bouyer * from this software without specific prior written permission. 25 1.2.2.2 bouyer * 26 1.2.2.2 bouyer * Alternatively, this software may be distributed under the terms of the 27 1.2.2.2 bouyer * GNU General Public License ("GPL") version 2 as published by the Free 28 1.2.2.2 bouyer * Software Foundation. 29 1.2.2.2 bouyer * 30 1.2.2.2 bouyer * NO WARRANTY 31 1.2.2.2 bouyer * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 32 1.2.2.2 bouyer * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 33 1.2.2.2 bouyer * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 34 1.2.2.2 bouyer * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 35 1.2.2.2 bouyer * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 1.2.2.2 bouyer * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 1.2.2.2 bouyer * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 1.2.2.2 bouyer * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 39 1.2.2.2 bouyer * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 40 1.2.2.2 bouyer * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 41 1.2.2.2 bouyer * POSSIBILITY OF SUCH DAMAGES. 42 1.2.2.2 bouyer */ 43 1.2.2.2 bouyer 44 1.2.2.2 bouyer #define __UTOSI_C__ 45 1.2.2.2 bouyer 46 1.2.2.2 bouyer #include "acpi.h" 47 1.2.2.2 bouyer #include "accommon.h" 48 1.2.2.2 bouyer 49 1.2.2.2 bouyer 50 1.2.2.2 bouyer #define _COMPONENT ACPI_UTILITIES 51 1.2.2.2 bouyer ACPI_MODULE_NAME ("utosi") 52 1.2.2.2 bouyer 53 1.2.2.2 bouyer /* 54 1.2.2.2 bouyer * Strings supported by the _OSI predefined control method (which is 55 1.2.2.2 bouyer * implemented internally within this module.) 56 1.2.2.2 bouyer * 57 1.2.2.2 bouyer * March 2009: Removed "Linux" as this host no longer wants to respond true 58 1.2.2.2 bouyer * for this string. Basically, the only safe OS strings are windows-related 59 1.2.2.2 bouyer * and in many or most cases represent the only test path within the 60 1.2.2.2 bouyer * BIOS-provided ASL code. 61 1.2.2.2 bouyer * 62 1.2.2.2 bouyer * The last element of each entry is used to track the newest version of 63 1.2.2.2 bouyer * Windows that the BIOS has requested. 64 1.2.2.2 bouyer */ 65 1.2.2.2 bouyer static ACPI_INTERFACE_INFO AcpiDefaultSupportedInterfaces[] = 66 1.2.2.2 bouyer { 67 1.2.2.2 bouyer /* Operating System Vendor Strings */ 68 1.2.2.2 bouyer 69 1.2.2.2 bouyer {"Windows 2000", NULL, 0, ACPI_OSI_WIN_2000}, /* Windows 2000 */ 70 1.2.2.2 bouyer {"Windows 2001", NULL, 0, ACPI_OSI_WIN_XP}, /* Windows XP */ 71 1.2.2.2 bouyer {"Windows 2001 SP1", NULL, 0, ACPI_OSI_WIN_XP_SP1}, /* Windows XP SP1 */ 72 1.2.2.2 bouyer {"Windows 2001.1", NULL, 0, ACPI_OSI_WINSRV_2003}, /* Windows Server 2003 */ 73 1.2.2.2 bouyer {"Windows 2001 SP2", NULL, 0, ACPI_OSI_WIN_XP_SP2}, /* Windows XP SP2 */ 74 1.2.2.2 bouyer {"Windows 2001.1 SP1", NULL, 0, ACPI_OSI_WINSRV_2003_SP1}, /* Windows Server 2003 SP1 - Added 03/2006 */ 75 1.2.2.2 bouyer {"Windows 2006", NULL, 0, ACPI_OSI_WIN_VISTA}, /* Windows Vista - Added 03/2006 */ 76 1.2.2.2 bouyer {"Windows 2006.1", NULL, 0, ACPI_OSI_WINSRV_2008}, /* Windows Server 2008 - Added 09/2009 */ 77 1.2.2.2 bouyer {"Windows 2006 SP1", NULL, 0, ACPI_OSI_WIN_VISTA_SP1}, /* Windows Vista SP1 - Added 09/2009 */ 78 1.2.2.2 bouyer {"Windows 2006 SP2", NULL, 0, ACPI_OSI_WIN_VISTA_SP2}, /* Windows Vista SP2 - Added 09/2010 */ 79 1.2.2.2 bouyer {"Windows 2009", NULL, 0, ACPI_OSI_WIN_7}, /* Windows 7 and Server 2008 R2 - Added 09/2009 */ 80 1.2.2.2 bouyer 81 1.2.2.2 bouyer /* Feature Group Strings */ 82 1.2.2.2 bouyer 83 1.2.2.2 bouyer {"Extended Address Space Descriptor", NULL, 0, 0} 84 1.2.2.2 bouyer 85 1.2.2.2 bouyer /* 86 1.2.2.2 bouyer * All "optional" feature group strings (features that are implemented 87 1.2.2.2 bouyer * by the host) should be dynamically added by the host via 88 1.2.2.2 bouyer * AcpiInstallInterface and should not be manually added here. 89 1.2.2.2 bouyer * 90 1.2.2.2 bouyer * Examples of optional feature group strings: 91 1.2.2.2 bouyer * 92 1.2.2.2 bouyer * "Module Device" 93 1.2.2.2 bouyer * "Processor Device" 94 1.2.2.2 bouyer * "3.0 Thermal Model" 95 1.2.2.2 bouyer * "3.0 _SCP Extensions" 96 1.2.2.2 bouyer * "Processor Aggregator Device" 97 1.2.2.2 bouyer */ 98 1.2.2.2 bouyer }; 99 1.2.2.2 bouyer 100 1.2.2.2 bouyer 101 1.2.2.2 bouyer /******************************************************************************* 102 1.2.2.2 bouyer * 103 1.2.2.2 bouyer * FUNCTION: AcpiUtInitializeInterfaces 104 1.2.2.2 bouyer * 105 1.2.2.2 bouyer * PARAMETERS: None 106 1.2.2.2 bouyer * 107 1.2.2.2 bouyer * RETURN: Status 108 1.2.2.2 bouyer * 109 1.2.2.2 bouyer * DESCRIPTION: Initialize the global _OSI supported interfaces list 110 1.2.2.2 bouyer * 111 1.2.2.2 bouyer ******************************************************************************/ 112 1.2.2.2 bouyer 113 1.2.2.2 bouyer ACPI_STATUS 114 1.2.2.2 bouyer AcpiUtInitializeInterfaces ( 115 1.2.2.2 bouyer void) 116 1.2.2.2 bouyer { 117 1.2.2.2 bouyer UINT32 i; 118 1.2.2.2 bouyer 119 1.2.2.2 bouyer 120 1.2.2.2 bouyer (void) AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 121 1.2.2.2 bouyer AcpiGbl_SupportedInterfaces = AcpiDefaultSupportedInterfaces; 122 1.2.2.2 bouyer 123 1.2.2.2 bouyer /* Link the static list of supported interfaces */ 124 1.2.2.2 bouyer 125 1.2.2.2 bouyer for (i = 0; i < (ACPI_ARRAY_LENGTH (AcpiDefaultSupportedInterfaces) - 1); i++) 126 1.2.2.2 bouyer { 127 1.2.2.2 bouyer AcpiDefaultSupportedInterfaces[i].Next = 128 1.2.2.2 bouyer &AcpiDefaultSupportedInterfaces[(ACPI_SIZE) i + 1]; 129 1.2.2.2 bouyer } 130 1.2.2.2 bouyer 131 1.2.2.2 bouyer AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 132 1.2.2.2 bouyer return (AE_OK); 133 1.2.2.2 bouyer } 134 1.2.2.2 bouyer 135 1.2.2.2 bouyer 136 1.2.2.2 bouyer /******************************************************************************* 137 1.2.2.2 bouyer * 138 1.2.2.2 bouyer * FUNCTION: AcpiUtInterfaceTerminate 139 1.2.2.2 bouyer * 140 1.2.2.2 bouyer * PARAMETERS: None 141 1.2.2.2 bouyer * 142 1.2.2.2 bouyer * RETURN: None 143 1.2.2.2 bouyer * 144 1.2.2.2 bouyer * DESCRIPTION: Delete all interfaces in the global list. Sets 145 1.2.2.2 bouyer * AcpiGbl_SupportedInterfaces to NULL. 146 1.2.2.2 bouyer * 147 1.2.2.2 bouyer ******************************************************************************/ 148 1.2.2.2 bouyer 149 1.2.2.2 bouyer void 150 1.2.2.2 bouyer AcpiUtInterfaceTerminate ( 151 1.2.2.2 bouyer void) 152 1.2.2.2 bouyer { 153 1.2.2.2 bouyer ACPI_INTERFACE_INFO *NextInterface; 154 1.2.2.2 bouyer 155 1.2.2.2 bouyer 156 1.2.2.2 bouyer (void) AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 157 1.2.2.2 bouyer NextInterface = AcpiGbl_SupportedInterfaces; 158 1.2.2.2 bouyer 159 1.2.2.2 bouyer while (NextInterface) 160 1.2.2.2 bouyer { 161 1.2.2.2 bouyer AcpiGbl_SupportedInterfaces = NextInterface->Next; 162 1.2.2.2 bouyer 163 1.2.2.2 bouyer /* Only interfaces added at runtime can be freed */ 164 1.2.2.2 bouyer 165 1.2.2.2 bouyer if (NextInterface->Flags & ACPI_OSI_DYNAMIC) 166 1.2.2.2 bouyer { 167 1.2.2.2 bouyer ACPI_FREE (NextInterface->Name); 168 1.2.2.2 bouyer ACPI_FREE (NextInterface); 169 1.2.2.2 bouyer } 170 1.2.2.2 bouyer 171 1.2.2.2 bouyer NextInterface = AcpiGbl_SupportedInterfaces; 172 1.2.2.2 bouyer } 173 1.2.2.2 bouyer 174 1.2.2.2 bouyer AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 175 1.2.2.2 bouyer } 176 1.2.2.2 bouyer 177 1.2.2.2 bouyer 178 1.2.2.2 bouyer /******************************************************************************* 179 1.2.2.2 bouyer * 180 1.2.2.2 bouyer * FUNCTION: AcpiUtInstallInterface 181 1.2.2.2 bouyer * 182 1.2.2.2 bouyer * PARAMETERS: InterfaceName - The interface to install 183 1.2.2.2 bouyer * 184 1.2.2.2 bouyer * RETURN: Status 185 1.2.2.2 bouyer * 186 1.2.2.2 bouyer * DESCRIPTION: Install the interface into the global interface list. 187 1.2.2.2 bouyer * Caller MUST hold AcpiGbl_OsiMutex 188 1.2.2.2 bouyer * 189 1.2.2.2 bouyer ******************************************************************************/ 190 1.2.2.2 bouyer 191 1.2.2.2 bouyer ACPI_STATUS 192 1.2.2.2 bouyer AcpiUtInstallInterface ( 193 1.2.2.2 bouyer ACPI_STRING InterfaceName) 194 1.2.2.2 bouyer { 195 1.2.2.2 bouyer ACPI_INTERFACE_INFO *InterfaceInfo; 196 1.2.2.2 bouyer 197 1.2.2.2 bouyer 198 1.2.2.2 bouyer /* Allocate info block and space for the name string */ 199 1.2.2.2 bouyer 200 1.2.2.2 bouyer InterfaceInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_INTERFACE_INFO)); 201 1.2.2.2 bouyer if (!InterfaceInfo) 202 1.2.2.2 bouyer { 203 1.2.2.2 bouyer return (AE_NO_MEMORY); 204 1.2.2.2 bouyer } 205 1.2.2.2 bouyer 206 1.2.2.2 bouyer InterfaceInfo->Name = ACPI_ALLOCATE_ZEROED (ACPI_STRLEN (InterfaceName) + 1); 207 1.2.2.2 bouyer if (!InterfaceInfo->Name) 208 1.2.2.2 bouyer { 209 1.2.2.2 bouyer ACPI_FREE (InterfaceInfo); 210 1.2.2.2 bouyer return (AE_NO_MEMORY); 211 1.2.2.2 bouyer } 212 1.2.2.2 bouyer 213 1.2.2.2 bouyer /* Initialize new info and insert at the head of the global list */ 214 1.2.2.2 bouyer 215 1.2.2.2 bouyer ACPI_STRCPY (InterfaceInfo->Name, InterfaceName); 216 1.2.2.2 bouyer InterfaceInfo->Flags = ACPI_OSI_DYNAMIC; 217 1.2.2.2 bouyer InterfaceInfo->Next = AcpiGbl_SupportedInterfaces; 218 1.2.2.2 bouyer 219 1.2.2.2 bouyer AcpiGbl_SupportedInterfaces = InterfaceInfo; 220 1.2.2.2 bouyer return (AE_OK); 221 1.2.2.2 bouyer } 222 1.2.2.2 bouyer 223 1.2.2.2 bouyer 224 1.2.2.2 bouyer /******************************************************************************* 225 1.2.2.2 bouyer * 226 1.2.2.2 bouyer * FUNCTION: AcpiUtRemoveInterface 227 1.2.2.2 bouyer * 228 1.2.2.2 bouyer * PARAMETERS: InterfaceName - The interface to remove 229 1.2.2.2 bouyer * 230 1.2.2.2 bouyer * RETURN: Status 231 1.2.2.2 bouyer * 232 1.2.2.2 bouyer * DESCRIPTION: Remove the interface from the global interface list. 233 1.2.2.2 bouyer * Caller MUST hold AcpiGbl_OsiMutex 234 1.2.2.2 bouyer * 235 1.2.2.2 bouyer ******************************************************************************/ 236 1.2.2.2 bouyer 237 1.2.2.2 bouyer ACPI_STATUS 238 1.2.2.2 bouyer AcpiUtRemoveInterface ( 239 1.2.2.2 bouyer ACPI_STRING InterfaceName) 240 1.2.2.2 bouyer { 241 1.2.2.2 bouyer ACPI_INTERFACE_INFO *PreviousInterface; 242 1.2.2.2 bouyer ACPI_INTERFACE_INFO *NextInterface; 243 1.2.2.2 bouyer 244 1.2.2.2 bouyer 245 1.2.2.2 bouyer PreviousInterface = NextInterface = AcpiGbl_SupportedInterfaces; 246 1.2.2.2 bouyer while (NextInterface) 247 1.2.2.2 bouyer { 248 1.2.2.2 bouyer if (!ACPI_STRCMP (InterfaceName, NextInterface->Name)) 249 1.2.2.2 bouyer { 250 1.2.2.2 bouyer /* Found: name is in either the static list or was added at runtime */ 251 1.2.2.2 bouyer 252 1.2.2.2 bouyer if (NextInterface->Flags & ACPI_OSI_DYNAMIC) 253 1.2.2.2 bouyer { 254 1.2.2.2 bouyer /* Interface was added dynamically, remove and free it */ 255 1.2.2.2 bouyer 256 1.2.2.2 bouyer if (PreviousInterface == NextInterface) 257 1.2.2.2 bouyer { 258 1.2.2.2 bouyer AcpiGbl_SupportedInterfaces = NextInterface->Next; 259 1.2.2.2 bouyer } 260 1.2.2.2 bouyer else 261 1.2.2.2 bouyer { 262 1.2.2.2 bouyer PreviousInterface->Next = NextInterface->Next; 263 1.2.2.2 bouyer } 264 1.2.2.2 bouyer 265 1.2.2.2 bouyer ACPI_FREE (NextInterface->Name); 266 1.2.2.2 bouyer ACPI_FREE (NextInterface); 267 1.2.2.2 bouyer } 268 1.2.2.2 bouyer else 269 1.2.2.2 bouyer { 270 1.2.2.2 bouyer /* 271 1.2.2.2 bouyer * Interface is in static list. If marked invalid, then it 272 1.2.2.2 bouyer * does not actually exist. Else, mark it invalid. 273 1.2.2.2 bouyer */ 274 1.2.2.2 bouyer if (NextInterface->Flags & ACPI_OSI_INVALID) 275 1.2.2.2 bouyer { 276 1.2.2.2 bouyer return (AE_NOT_EXIST); 277 1.2.2.2 bouyer } 278 1.2.2.2 bouyer 279 1.2.2.2 bouyer NextInterface->Flags |= ACPI_OSI_INVALID; 280 1.2.2.2 bouyer } 281 1.2.2.2 bouyer 282 1.2.2.2 bouyer return (AE_OK); 283 1.2.2.2 bouyer } 284 1.2.2.2 bouyer 285 1.2.2.2 bouyer PreviousInterface = NextInterface; 286 1.2.2.2 bouyer NextInterface = NextInterface->Next; 287 1.2.2.2 bouyer } 288 1.2.2.2 bouyer 289 1.2.2.2 bouyer /* Interface was not found */ 290 1.2.2.2 bouyer 291 1.2.2.2 bouyer return (AE_NOT_EXIST); 292 1.2.2.2 bouyer } 293 1.2.2.2 bouyer 294 1.2.2.2 bouyer 295 1.2.2.2 bouyer /******************************************************************************* 296 1.2.2.2 bouyer * 297 1.2.2.2 bouyer * FUNCTION: AcpiUtGetInterface 298 1.2.2.2 bouyer * 299 1.2.2.2 bouyer * PARAMETERS: InterfaceName - The interface to find 300 1.2.2.2 bouyer * 301 1.2.2.2 bouyer * RETURN: ACPI_INTERFACE_INFO if found. NULL if not found. 302 1.2.2.2 bouyer * 303 1.2.2.2 bouyer * DESCRIPTION: Search for the specified interface name in the global list. 304 1.2.2.2 bouyer * Caller MUST hold AcpiGbl_OsiMutex 305 1.2.2.2 bouyer * 306 1.2.2.2 bouyer ******************************************************************************/ 307 1.2.2.2 bouyer 308 1.2.2.2 bouyer ACPI_INTERFACE_INFO * 309 1.2.2.2 bouyer AcpiUtGetInterface ( 310 1.2.2.2 bouyer ACPI_STRING InterfaceName) 311 1.2.2.2 bouyer { 312 1.2.2.2 bouyer ACPI_INTERFACE_INFO *NextInterface; 313 1.2.2.2 bouyer 314 1.2.2.2 bouyer 315 1.2.2.2 bouyer NextInterface = AcpiGbl_SupportedInterfaces; 316 1.2.2.2 bouyer while (NextInterface) 317 1.2.2.2 bouyer { 318 1.2.2.2 bouyer if (!ACPI_STRCMP (InterfaceName, NextInterface->Name)) 319 1.2.2.2 bouyer { 320 1.2.2.2 bouyer return (NextInterface); 321 1.2.2.2 bouyer } 322 1.2.2.2 bouyer 323 1.2.2.2 bouyer NextInterface = NextInterface->Next; 324 1.2.2.2 bouyer } 325 1.2.2.2 bouyer 326 1.2.2.2 bouyer return (NULL); 327 1.2.2.2 bouyer } 328 1.2.2.2 bouyer 329 1.2.2.2 bouyer 330 1.2.2.2 bouyer /******************************************************************************* 331 1.2.2.2 bouyer * 332 1.2.2.2 bouyer * FUNCTION: AcpiUtOsiImplementation 333 1.2.2.2 bouyer * 334 1.2.2.2 bouyer * PARAMETERS: WalkState - Current walk state 335 1.2.2.2 bouyer * 336 1.2.2.2 bouyer * RETURN: Status 337 1.2.2.2 bouyer * 338 1.2.2.2 bouyer * DESCRIPTION: Implementation of the _OSI predefined control method. When 339 1.2.2.2 bouyer * an invocation of _OSI is encountered in the system AML, 340 1.2.2.2 bouyer * control is transferred to this function. 341 1.2.2.2 bouyer * 342 1.2.2.2 bouyer ******************************************************************************/ 343 1.2.2.2 bouyer 344 1.2.2.2 bouyer ACPI_STATUS 345 1.2.2.2 bouyer AcpiUtOsiImplementation ( 346 1.2.2.2 bouyer ACPI_WALK_STATE *WalkState) 347 1.2.2.2 bouyer { 348 1.2.2.2 bouyer ACPI_OPERAND_OBJECT *StringDesc; 349 1.2.2.2 bouyer ACPI_OPERAND_OBJECT *ReturnDesc; 350 1.2.2.2 bouyer ACPI_INTERFACE_INFO *InterfaceInfo; 351 1.2.2.2 bouyer ACPI_INTERFACE_HANDLER InterfaceHandler; 352 1.2.2.2 bouyer UINT32 ReturnValue; 353 1.2.2.2 bouyer 354 1.2.2.2 bouyer 355 1.2.2.2 bouyer ACPI_FUNCTION_TRACE (UtOsiImplementation); 356 1.2.2.2 bouyer 357 1.2.2.2 bouyer 358 1.2.2.2 bouyer /* Validate the string input argument (from the AML caller) */ 359 1.2.2.2 bouyer 360 1.2.2.2 bouyer StringDesc = WalkState->Arguments[0].Object; 361 1.2.2.2 bouyer if (!StringDesc || 362 1.2.2.2 bouyer (StringDesc->Common.Type != ACPI_TYPE_STRING)) 363 1.2.2.2 bouyer { 364 1.2.2.2 bouyer return_ACPI_STATUS (AE_TYPE); 365 1.2.2.2 bouyer } 366 1.2.2.2 bouyer 367 1.2.2.2 bouyer /* Create a return object */ 368 1.2.2.2 bouyer 369 1.2.2.2 bouyer ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 370 1.2.2.2 bouyer if (!ReturnDesc) 371 1.2.2.2 bouyer { 372 1.2.2.2 bouyer return_ACPI_STATUS (AE_NO_MEMORY); 373 1.2.2.2 bouyer } 374 1.2.2.2 bouyer 375 1.2.2.2 bouyer /* Default return value is 0, NOT SUPPORTED */ 376 1.2.2.2 bouyer 377 1.2.2.2 bouyer ReturnValue = 0; 378 1.2.2.2 bouyer (void) AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 379 1.2.2.2 bouyer 380 1.2.2.2 bouyer /* Lookup the interface in the global _OSI list */ 381 1.2.2.2 bouyer 382 1.2.2.2 bouyer InterfaceInfo = AcpiUtGetInterface (StringDesc->String.Pointer); 383 1.2.2.2 bouyer if (InterfaceInfo && 384 1.2.2.2 bouyer !(InterfaceInfo->Flags & ACPI_OSI_INVALID)) 385 1.2.2.2 bouyer { 386 1.2.2.2 bouyer /* 387 1.2.2.2 bouyer * The interface is supported. 388 1.2.2.2 bouyer * Update the OsiData if necessary. We keep track of the latest 389 1.2.2.2 bouyer * version of Windows that has been requested by the BIOS. 390 1.2.2.2 bouyer */ 391 1.2.2.2 bouyer if (InterfaceInfo->Value > AcpiGbl_OsiData) 392 1.2.2.2 bouyer { 393 1.2.2.2 bouyer AcpiGbl_OsiData = InterfaceInfo->Value; 394 1.2.2.2 bouyer } 395 1.2.2.2 bouyer 396 1.2.2.2 bouyer ReturnValue = ACPI_UINT32_MAX; 397 1.2.2.2 bouyer } 398 1.2.2.2 bouyer 399 1.2.2.2 bouyer AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 400 1.2.2.2 bouyer 401 1.2.2.2 bouyer /* 402 1.2.2.2 bouyer * Invoke an optional _OSI interface handler. The host OS may wish 403 1.2.2.2 bouyer * to do some interface-specific handling. For example, warn about 404 1.2.2.2 bouyer * certain interfaces or override the true/false support value. 405 1.2.2.2 bouyer */ 406 1.2.2.2 bouyer InterfaceHandler = AcpiGbl_InterfaceHandler; 407 1.2.2.2 bouyer if (InterfaceHandler) 408 1.2.2.2 bouyer { 409 1.2.2.2 bouyer ReturnValue = InterfaceHandler ( 410 1.2.2.2 bouyer StringDesc->String.Pointer, ReturnValue); 411 1.2.2.2 bouyer } 412 1.2.2.2 bouyer 413 1.2.2.2 bouyer ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INFO, 414 1.2.2.2 bouyer "ACPI: BIOS _OSI(\"%s\") is %ssupported\n", 415 1.2.2.2 bouyer StringDesc->String.Pointer, ReturnValue == 0 ? "not " : "")); 416 1.2.2.2 bouyer 417 1.2.2.2 bouyer /* Complete the return object */ 418 1.2.2.2 bouyer 419 1.2.2.2 bouyer ReturnDesc->Integer.Value = ReturnValue; 420 1.2.2.2 bouyer WalkState->ReturnDesc = ReturnDesc; 421 1.2.2.2 bouyer return_ACPI_STATUS (AE_OK); 422 1.2.2.2 bouyer } 423
Indexes created Fri Oct 31 11:10:07 GMT 2025