/****************************************************************************** * * Module Name: exutils - interpreter/scanner utilities * $Revision: 88 $ * *****************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999, 2000, 2001, 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 "acpi.h" #include "acparser.h" #include "acinterp.h" #include "amlcode.h" #include "acnamesp.h" #include "acevents.h" #include "acparser.h" #define _COMPONENT ACPI_EXECUTER MODULE_NAME ("exutils") /******************************************************************************* * * FUNCTION: AcpiExEnterInterpreter * * PARAMETERS: None * * DESCRIPTION: Enter the interpreter execution region * ******************************************************************************/ ACPI_STATUS AcpiExEnterInterpreter (void) { ACPI_STATUS Status; FUNCTION_TRACE ("ExEnterInterpreter"); Status = AcpiUtAcquireMutex (ACPI_MTX_EXECUTE); return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiExExitInterpreter * * PARAMETERS: None * * DESCRIPTION: Exit the interpreter execution region * * Cases where the interpreter is unlocked: * 1) Completion of the execution of a control method * 2) Method blocked on a Sleep() AML opcode * 3) Method blocked on an Acquire() AML opcode * 4) Method blocked on a Wait() AML opcode * 5) Method blocked to acquire the global lock * 6) Method blocked to execute a serialized control method that is * already executing * 7) About to invoke a user-installed opregion handler * ******************************************************************************/ void AcpiExExitInterpreter (void) { FUNCTION_TRACE ("ExExitInterpreter"); AcpiUtReleaseMutex (ACPI_MTX_EXECUTE); return_VOID; } /******************************************************************************* * * FUNCTION: AcpiExValidateObjectType * * PARAMETERS: Type Object type to validate * * DESCRIPTION: Determine if a type is a valid ACPI object type * ******************************************************************************/ BOOLEAN AcpiExValidateObjectType ( ACPI_OBJECT_TYPE Type) { FUNCTION_ENTRY (); if ((Type > ACPI_TYPE_MAX && Type < INTERNAL_TYPE_BEGIN) || (Type > INTERNAL_TYPE_MAX)) { return (FALSE); } return (TRUE); } /******************************************************************************* * * FUNCTION: AcpiExTruncateFor32bitTable * * PARAMETERS: ObjDesc - Object to be truncated * WalkState - Current walk state * (A method must be executing) * * RETURN: none * * DESCRIPTION: Truncate a number to 32-bits if the currently executing method * belongs to a 32-bit ACPI table. * ******************************************************************************/ void AcpiExTruncateFor32bitTable ( ACPI_OPERAND_OBJECT *ObjDesc, ACPI_WALK_STATE *WalkState) { FUNCTION_ENTRY (); /* * Object must be a valid number and we must be executing * a control method */ if ((!ObjDesc) || (ObjDesc->Common.Type != ACPI_TYPE_INTEGER) || (!WalkState->MethodNode)) { return; } if (WalkState->MethodNode->Flags & ANOBJ_DATA_WIDTH_32) { /* * 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: TRUE/FALSE indicating whether the lock was actually acquired * * DESCRIPTION: Obtain the global lock and keep track of this fact via two * methods. A global variable keeps the state of the lock, and * the state is returned to the caller. * ******************************************************************************/ BOOLEAN AcpiExAcquireGlobalLock ( UINT32 FieldFlags) { BOOLEAN Locked = FALSE; ACPI_STATUS Status; FUNCTION_TRACE ("ExAcquireGlobalLock"); /* Only attempt lock if the AlwaysLock bit is set */ if (FieldFlags & AML_FIELD_LOCK_RULE_MASK) { /* We should attempt to get the lock */ Status = AcpiEvAcquireGlobalLock (); if (ACPI_SUCCESS (Status)) { Locked = TRUE; } else { ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not acquire Global Lock, %s\n", AcpiFormatException (Status))); } } return_VALUE (Locked); } /******************************************************************************* * * FUNCTION: AcpiExReleaseGlobalLock * * PARAMETERS: LockedByMe - Return value from corresponding call to * AcquireGlobalLock. * * RETURN: Status * * DESCRIPTION: Release the global lock if it is locked. * ******************************************************************************/ ACPI_STATUS AcpiExReleaseGlobalLock ( BOOLEAN LockedByMe) { FUNCTION_TRACE ("ExReleaseGlobalLock"); /* Only attempt unlock if the caller locked it */ if (LockedByMe) { /* OK, now release the lock */ AcpiEvReleaseGlobalLock (); } return_ACPI_STATUS (AE_OK); } /******************************************************************************* * * FUNCTION: AcpiExDigitsNeeded * * PARAMETERS: Value - Value to be represented * Base - Base of representation * * RETURN: the number of digits needed to represent Value in Base * ******************************************************************************/ UINT32 AcpiExDigitsNeeded ( ACPI_INTEGER Value, UINT32 Base) { UINT32 NumDigits = 0; FUNCTION_TRACE ("ExDigitsNeeded"); if (Base < 1) { REPORT_ERROR (("ExDigitsNeeded: Internal error - Invalid base\n")); } else { /* * ACPI_INTEGER is unsigned, which is why we don't worry about a '-' */ for (NumDigits = 1; (AcpiUtShortDivide (&Value, Base, &Value, NULL)); ++NumDigits) { ; } } return_VALUE (NumDigits); } /******************************************************************************* * * FUNCTION: ntohl * * PARAMETERS: Value - Value to be converted * * DESCRIPTION: Convert a 32-bit value to big-endian (swap the bytes) * ******************************************************************************/ static UINT32 _ntohl ( UINT32 Value) { union { UINT32 Value; UINT8 Bytes[4]; } Out; union { UINT32 Value; UINT8 Bytes[4]; } In; FUNCTION_ENTRY (); In.Value = Value; Out.Bytes[0] = In.Bytes[3]; Out.Bytes[1] = In.Bytes[2]; Out.Bytes[2] = In.Bytes[1]; Out.Bytes[3] = In.Bytes[0]; return (Out.Value); } /******************************************************************************* * * FUNCTION: AcpiExEisaIdToString * * PARAMETERS: NumericId - EISA ID to be converted * OutString - Where to put the converted string (8 bytes) * * DESCRIPTION: Convert a numeric EISA ID to string representation * ******************************************************************************/ ACPI_STATUS AcpiExEisaIdToString ( UINT32 NumericId, NATIVE_CHAR *OutString) { UINT32 id; FUNCTION_ENTRY (); /* swap to big-endian to get contiguous bits */ id = _ntohl (NumericId); OutString[0] = (char) ('@' + ((id >> 26) & 0x1f)); OutString[1] = (char) ('@' + ((id >> 21) & 0x1f)); OutString[2] = (char) ('@' + ((id >> 16) & 0x1f)); OutString[3] = AcpiUtHexToAsciiChar (id, 12); OutString[4] = AcpiUtHexToAsciiChar (id, 8); OutString[5] = AcpiUtHexToAsciiChar (id, 4); OutString[6] = AcpiUtHexToAsciiChar (id, 0); OutString[7] = 0; return (AE_OK); } /******************************************************************************* * * FUNCTION: AcpiExUnsignedIntegerToString * * PARAMETERS: Value - Value to be converted * OutString - Where to put the converted string (8 bytes) * * RETURN: Convert a number to string representation * ******************************************************************************/ ACPI_STATUS AcpiExUnsignedIntegerToString ( ACPI_INTEGER Value, NATIVE_CHAR *OutString) { UINT32 Count; UINT32 DigitsNeeded; UINT32 Remainder; FUNCTION_ENTRY (); DigitsNeeded = AcpiExDigitsNeeded (Value, 10); OutString[DigitsNeeded] = 0; for (Count = DigitsNeeded; Count > 0; Count--) { AcpiUtShortDivide (&Value, 10, &Value, &Remainder); OutString[Count-1] = (NATIVE_CHAR) ('0' + Remainder); } return (AE_OK); }