/****************************************************************************** * * Module Name: exutils - interpreter/scanner utilities * *****************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp. * All rights reserved. * * 2. License * * 2.1. This is your license from Intel Corp. under its intellectual property * rights. You may have additional license terms from the party that provided * you this software, covering your right to use that party's intellectual * property rights. * * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a * copy of the source code appearing in this file ("Covered Code") an * irrevocable, perpetual, worldwide license under Intel's copyrights in the * base code distributed originally by Intel ("Original Intel Code") to copy, * make derivatives, distribute, use and display any portion of the Covered * Code in any form, with the right to sublicense such rights; and * * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent * license (with the right to sublicense), under only those claims of Intel * patents that are infringed by the Original Intel Code, to make, use, sell, * offer to sell, and import the Covered Code and derivative works thereof * solely to the minimum extent necessary to exercise the above copyright * license, and in no event shall the patent license extend to any additions * to or modifications of the Original Intel Code. No other license or right * is granted directly or by implication, estoppel or otherwise; * * The above copyright and patent license is granted only if the following * conditions are met: * * 3. Conditions * * 3.1. Redistribution of Source with Rights to Further Distribute Source. * Redistribution of source code of any substantial portion of the Covered * Code or modification with rights to further distribute source must include * the above Copyright Notice, the above License, this list of Conditions, * and the following Disclaimer and Export Compliance provision. In addition, * Licensee must cause all Covered Code to which Licensee contributes to * contain a file documenting the changes Licensee made to create that Covered * Code and the date of any change. Licensee must include in that file the * documentation of any changes made by any predecessor Licensee. Licensee * must include a prominent statement that the modification is derived, * directly or indirectly, from Original Intel Code. * * 3.2. Redistribution of Source with no Rights to Further Distribute Source. * Redistribution of source code of any substantial portion of the Covered * Code or modification without rights to further distribute source must * include the following Disclaimer and Export Compliance provision in the * documentation and/or other materials provided with distribution. In * addition, Licensee may not authorize further sublicense of source of any * portion of the Covered Code, and must include terms to the effect that the * license from Licensee to its licensee is limited to the intellectual * property embodied in the software Licensee provides to its licensee, and * not to intellectual property embodied in modifications its licensee may * make. * * 3.3. Redistribution of Executable. Redistribution in executable form of any * substantial portion of the Covered Code or modification must reproduce the * above Copyright Notice, and the following Disclaimer and Export Compliance * provision in the documentation and/or other materials provided with the * distribution. * * 3.4. Intel retains all right, title, and interest in and to the Original * Intel Code. * * 3.5. Neither the name Intel nor any other trademark owned or controlled by * Intel shall be used in advertising or otherwise to promote the sale, use or * other dealings in products derived from or relating to the Covered Code * without prior written authorization from Intel. * * 4. Disclaimer and Export Compliance * * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A * PARTICULAR PURPOSE. * * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY * LIMITED REMEDY. * * 4.3. Licensee shall not export, either directly or indirectly, any of this * software or system incorporating such software without first obtaining any * required license or other approval from the U. S. Department of Commerce or * any other agency or department of the United States Government. In the * event Licensee exports any such software from the United States or * re-exports any such software from a foreign destination, Licensee shall * ensure that the distribution and export/re-export of the software is in * compliance with all laws, regulations, orders, or other restrictions of the * U.S. Export Administration Regulations. Licensee agrees that neither it nor * any of its subsidiaries will export/re-export any technical data, process, * software, or service, directly or indirectly, to any country for which the * United States government or any agency thereof requires an export license, * other governmental approval, or letter of assurance, without first obtaining * such license, approval or letter. * *****************************************************************************/ #define __EXUTILS_C__ /* * DEFINE_AML_GLOBALS is tested in amlcode.h * to determine whether certain global names should be "defined" or only * "declared" in the current compilation. This enhances maintainability * by enabling a single header file to embody all knowledge of the names * in question. * * Exactly one module of any executable should #define DEFINE_GLOBALS * before #including the header files which use this convention. The * names in question will be defined and initialized in that module, * and declared as extern in all other modules which #include those * header files. */ #define DEFINE_AML_GLOBALS #include #include #include #include #define _COMPONENT ACPI_EXECUTER ACPI_MODULE_NAME ("exutils") /* Local prototypes */ static UINT32 AcpiExDigitsNeeded ( ACPI_INTEGER Value, UINT32 Base); #ifndef ACPI_NO_METHOD_EXECUTION /******************************************************************************* * * FUNCTION: AcpiExEnterInterpreter * * PARAMETERS: None * * RETURN: None * * DESCRIPTION: Enter the interpreter execution region. Failure to enter * the interpreter region is a fatal system error. Used in * conjunction with ExitInterpreter. * ******************************************************************************/ void AcpiExEnterInterpreter ( void) { ACPI_STATUS Status; ACPI_FUNCTION_TRACE (ExEnterInterpreter); Status = AcpiUtAcquireMutex (ACPI_MTX_INTERPRETER); if (ACPI_FAILURE (Status)) { ACPI_ERROR ((AE_INFO, "Could not acquire AML Interpreter mutex")); } return_VOID; } /******************************************************************************* * * FUNCTION: AcpiExReacquireInterpreter * * PARAMETERS: None * * RETURN: None * * DESCRIPTION: Reacquire the interpreter execution region from within the * interpreter code. Failure to enter the interpreter region is a * fatal system error. Used in conjuction with * RelinquishInterpreter * ******************************************************************************/ void AcpiExReacquireInterpreter ( void) { ACPI_FUNCTION_TRACE (ExReacquireInterpreter); /* * If the global serialized flag is set, do not release the interpreter, * since it was not actually released by AcpiExRelinquishInterpreter. * This forces the interpreter to be single threaded. */ if (!AcpiGbl_AllMethodsSerialized) { AcpiExEnterInterpreter (); } return_VOID; } /******************************************************************************* * * FUNCTION: AcpiExExitInterpreter * * PARAMETERS: None * * RETURN: None * * DESCRIPTION: Exit the interpreter execution region. This is the top level * routine used to exit the interpreter when all processing has * been completed. * ******************************************************************************/ void AcpiExExitInterpreter ( void) { ACPI_STATUS Status; ACPI_FUNCTION_TRACE (ExExitInterpreter); Status = AcpiUtReleaseMutex (ACPI_MTX_INTERPRETER); if (ACPI_FAILURE (Status)) { ACPI_ERROR ((AE_INFO, "Could not release AML Interpreter mutex")); } return_VOID; } /******************************************************************************* * * FUNCTION: AcpiExRelinquishInterpreter * * PARAMETERS: None * * RETURN: None * * DESCRIPTION: Exit the interpreter execution region, from within the * interpreter - before attempting an operation that will possibly * block the running thread. * * Cases where the interpreter is unlocked internally * 1) Method to be blocked on a Sleep() AML opcode * 2) Method to be blocked on an Acquire() AML opcode * 3) Method to be blocked on a Wait() AML opcode * 4) Method to be blocked to acquire the global lock * 5) Method to be blocked waiting to execute a serialized control method * that is currently executing * 6) About to invoke a user-installed opregion handler * ******************************************************************************/ void AcpiExRelinquishInterpreter ( void) { ACPI_FUNCTION_TRACE (ExRelinquishInterpreter); /* * If the global serialized flag is set, do not release the interpreter. * This forces the interpreter to be single threaded. */ if (!AcpiGbl_AllMethodsSerialized) { AcpiExExitInterpreter (); } return_VOID; } /******************************************************************************* * * FUNCTION: AcpiExTruncateFor32bitTable * * PARAMETERS: ObjDesc - Object to be truncated * * RETURN: none * * DESCRIPTION: Truncate an ACPI Integer to 32 bits if the execution mode is * 32-bit, as determined by the revision of the DSDT. * ******************************************************************************/ void AcpiExTruncateFor32bitTable ( ACPI_OPERAND_OBJECT *ObjDesc) { ACPI_FUNCTION_ENTRY (); /* * Object must be a valid number and we must be executing * a control method. NS node could be there for AML_INT_NAMEPATH_OP. */ if ((!ObjDesc) || (ACPI_GET_DESCRIPTOR_TYPE (ObjDesc) != ACPI_DESC_TYPE_OPERAND) || (ObjDesc->Common.Type != ACPI_TYPE_INTEGER)) { return; } if (AcpiGbl_IntegerByteWidth == 4) { /* * We are running a method that exists in a 32-bit ACPI table. * Truncate the value to 32 bits by zeroing out the upper 32-bit field */ ObjDesc->Integer.Value &= (ACPI_INTEGER) ACPI_UINT32_MAX; } } /******************************************************************************* * * FUNCTION: AcpiExAcquireGlobalLock * * PARAMETERS: FieldFlags - Flags with Lock rule: * AlwaysLock or NeverLock * * RETURN: None * * DESCRIPTION: Obtain the ACPI hardware Global Lock, only if the field * flags specifiy that it is to be obtained before field access. * ******************************************************************************/ void AcpiExAcquireGlobalLock ( UINT32 FieldFlags) { ACPI_STATUS Status; ACPI_FUNCTION_TRACE (ExAcquireGlobalLock); /* Only use the lock if the AlwaysLock bit is set */ if (!(FieldFlags & AML_FIELD_LOCK_RULE_MASK)) { return_VOID; } /* Attempt to get the global lock, wait forever */ Status = AcpiExAcquireMutexObject (ACPI_WAIT_FOREVER, AcpiGbl_GlobalLockMutex, AcpiOsGetThreadId ()); if (ACPI_FAILURE (Status)) { ACPI_EXCEPTION ((AE_INFO, Status, "Could not acquire Global Lock")); } return_VOID; } /******************************************************************************* * * FUNCTION: AcpiExReleaseGlobalLock * * PARAMETERS: FieldFlags - Flags with Lock rule: * AlwaysLock or NeverLock * * RETURN: None * * DESCRIPTION: Release the ACPI hardware Global Lock * ******************************************************************************/ void AcpiExReleaseGlobalLock ( UINT32 FieldFlags) { ACPI_STATUS Status; ACPI_FUNCTION_TRACE (ExReleaseGlobalLock); /* Only use the lock if the AlwaysLock bit is set */ if (!(FieldFlags & AML_FIELD_LOCK_RULE_MASK)) { return_VOID; } /* Release the global lock */ Status = AcpiExReleaseMutexObject (AcpiGbl_GlobalLockMutex); if (ACPI_FAILURE (Status)) { /* Report the error, but there isn't much else we can do */ ACPI_EXCEPTION ((AE_INFO, Status, "Could not release Global Lock")); } return_VOID; } /******************************************************************************* * * FUNCTION: AcpiExDigitsNeeded * * PARAMETERS: Value - Value to be represented * Base - Base of representation * * RETURN: The number of digits. * * DESCRIPTION: Calculate the number of digits needed to represent the Value * in the given Base (Radix) * ******************************************************************************/ static UINT32 AcpiExDigitsNeeded ( ACPI_INTEGER Value, UINT32 Base) { UINT32 NumDigits; ACPI_INTEGER CurrentValue; ACPI_FUNCTION_TRACE (ExDigitsNeeded); /* ACPI_INTEGER is unsigned, so we don't worry about a '-' prefix */ if (Value == 0) { return_UINT32 (1); } CurrentValue = Value; NumDigits = 0; /* Count the digits in the requested base */ while (CurrentValue) { (void) AcpiUtShortDivide (CurrentValue, Base, &CurrentValue, NULL); NumDigits++; } return_UINT32 (NumDigits); } /******************************************************************************* * * FUNCTION: AcpiExEisaIdToString * * PARAMETERS: CompressedId - EISAID to be converted * OutString - Where to put the converted string (8 bytes) * * RETURN: None * * DESCRIPTION: Convert a numeric EISAID to string representation. Return * buffer must be large enough to hold the string. The string * returned is always exactly of length ACPI_EISAID_STRING_SIZE * (includes null terminator). The EISAID is always 32 bits. * ******************************************************************************/ void AcpiExEisaIdToString ( char *OutString, ACPI_INTEGER CompressedId) { UINT32 SwappedId; ACPI_FUNCTION_ENTRY (); /* The EISAID should be a 32-bit integer */ if (CompressedId > ACPI_UINT32_MAX) { ACPI_WARNING ((AE_INFO, "Expected EISAID is larger than 32 bits: 0x%8.8X%8.8X, truncating", ACPI_FORMAT_UINT64 (CompressedId))); } /* Swap ID to big-endian to get contiguous bits */ SwappedId = AcpiUtDwordByteSwap ((UINT32) CompressedId); /* First 3 bytes are uppercase letters. Next 4 bytes are hexadecimal */ OutString[0] = (char) (0x40 + (((unsigned long) SwappedId >> 26) & 0x1F)); OutString[1] = (char) (0x40 + ((SwappedId >> 21) & 0x1F)); OutString[2] = (char) (0x40 + ((SwappedId >> 16) & 0x1F)); OutString[3] = AcpiUtHexToAsciiChar ((ACPI_INTEGER) SwappedId, 12); OutString[4] = AcpiUtHexToAsciiChar ((ACPI_INTEGER) SwappedId, 8); OutString[5] = AcpiUtHexToAsciiChar ((ACPI_INTEGER) SwappedId, 4); OutString[6] = AcpiUtHexToAsciiChar ((ACPI_INTEGER) SwappedId, 0); OutString[7] = 0; } /******************************************************************************* * * FUNCTION: AcpiExIntegerToString * * PARAMETERS: OutString - Where to put the converted string. At least * 21 bytes are needed to hold the largest * possible 64-bit integer. * Value - Value to be converted * * RETURN: None, string * * DESCRIPTION: Convert a 64-bit integer to decimal string representation. * Assumes string buffer is large enough to hold the string. The * largest string is (ACPI_MAX64_DECIMAL_DIGITS + 1). * ******************************************************************************/ void AcpiExIntegerToString ( char *OutString, ACPI_INTEGER Value) { UINT32 Count; UINT32 DigitsNeeded; UINT32 Remainder; ACPI_FUNCTION_ENTRY (); DigitsNeeded = AcpiExDigitsNeeded (Value, 10); OutString[DigitsNeeded] = 0; for (Count = DigitsNeeded; Count > 0; Count--) { (void) AcpiUtShortDivide (Value, 10, &Value, &Remainder); OutString[Count-1] = (char) ('0' + Remainder);\ } } #endif