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576 lines
18 KiB
C
576 lines
18 KiB
C
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/******************************************************************************
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*
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* Module Name: amnames - interpreter/scanner name load/execute
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*
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*****************************************************************************/
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/******************************************************************************
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*
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* 1. Copyright Notice
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*
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* Some or all of this work - Copyright (c) 1999, Intel Corp. All rights
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* reserved.
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*
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* 2. License
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*
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* 2.1. This is your license from Intel Corp. under its intellectual property
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* rights. You may have additional license terms from the party that provided
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* you this software, covering your right to use that party's intellectual
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* property rights.
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*
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* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
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* copy of the source code appearing in this file ("Covered Code") an
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* irrevocable, perpetual, worldwide license under Intel's copyrights in the
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* base code distributed originally by Intel ("Original Intel Code") to copy,
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* make derivatives, distribute, use and display any portion of the Covered
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* Code in any form, with the right to sublicense such rights; and
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*
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* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
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* license (with the right to sublicense), under only those claims of Intel
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* patents that are infringed by the Original Intel Code, to make, use, sell,
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* offer to sell, and import the Covered Code and derivative works thereof
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* solely to the minimum extent necessary to exercise the above copyright
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* license, and in no event shall the patent license extend to any additions
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* to or modifications of the Original Intel Code. No other license or right
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* is granted directly or by implication, estoppel or otherwise;
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*
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* The above copyright and patent license is granted only if the following
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* conditions are met:
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*
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* 3. Conditions
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*
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* 3.1. Redistribution of Source with Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification with rights to further distribute source must include
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* the above Copyright Notice, the above License, this list of Conditions,
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* and the following Disclaimer and Export Compliance provision. In addition,
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* Licensee must cause all Covered Code to which Licensee contributes to
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* contain a file documenting the changes Licensee made to create that Covered
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* Code and the date of any change. Licensee must include in that file the
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* documentation of any changes made by any predecessor Licensee. Licensee
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* must include a prominent statement that the modification is derived,
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* directly or indirectly, from Original Intel Code.
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*
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* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification without rights to further distribute source must
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* include the following Disclaimer and Export Compliance provision in the
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* documentation and/or other materials provided with distribution. In
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* addition, Licensee may not authorize further sublicense of source of any
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* portion of the Covered Code, and must include terms to the effect that the
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* license from Licensee to its licensee is limited to the intellectual
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* property embodied in the software Licensee provides to its licensee, and
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* not to intellectual property embodied in modifications its licensee may
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* make.
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*
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* 3.3. Redistribution of Executable. Redistribution in executable form of any
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* substantial portion of the Covered Code or modification must reproduce the
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* above Copyright Notice, and the following Disclaimer and Export Compliance
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* provision in the documentation and/or other materials provided with the
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* distribution.
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*
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* 3.4. Intel retains all right, title, and interest in and to the Original
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* Intel Code.
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*
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* 3.5. Neither the name Intel nor any other trademark owned or controlled by
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* Intel shall be used in advertising or otherwise to promote the sale, use or
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* other dealings in products derived from or relating to the Covered Code
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* without prior written authorization from Intel.
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*
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* 4. Disclaimer and Export Compliance
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*
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* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
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* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
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* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
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* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
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* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
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* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
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* PARTICULAR PURPOSE.
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*
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* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
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* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
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* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
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* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
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* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
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* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
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* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
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* LIMITED REMEDY.
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*
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* 4.3. Licensee shall not export, either directly or indirectly, any of this
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* software or system incorporating such software without first obtaining any
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* required license or other approval from the U. S. Department of Commerce or
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* any other agency or department of the United States Government. In the
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* event Licensee exports any such software from the United States or
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* re-exports any such software from a foreign destination, Licensee shall
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* ensure that the distribution and export/re-export of the software is in
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* compliance with all laws, regulations, orders, or other restrictions of the
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* U.S. Export Administration Regulations. Licensee agrees that neither it nor
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* any of its subsidiaries will export/re-export any technical data, process,
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* software, or service, directly or indirectly, to any country for which the
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* United States government or any agency thereof requires an export license,
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* other governmental approval, or letter of assurance, without first obtaining
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* such license, approval or letter.
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*
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*****************************************************************************/
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#define __AMNAMES_C__
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#include "acpi.h"
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#include "interp.h"
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#include "amlcode.h"
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#include "namesp.h"
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#define _COMPONENT INTERPRETER
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MODULE_NAME ("amnames");
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#define PKG_TYPE1 64 /* or 0x40 Max encoding size = 0x3F */
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#define PKG_TYPE2 16384 /* or 0x4000 Max encoding size = 0xFFF */
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#define PKG_TYPE3 4194304 /* or 0x400000 Max encoding size = 0xFFFFF */
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#define PKG_TYPE4 1073741824 /* or 0x40000000 Max encoding size = 0xFFFFFFF */
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/*****************************************************************************
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*
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* FUNCTION: AcpiAmlAllocateNameString
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*
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* PARAMETERS: PrefixCount - Count of parent levels. Special cases:
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* (-1) = root, 0 = none
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* NumNameSegs - count of 4-character name segments
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*
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* RETURN: A pointer to the allocated string segment. This segment must
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* be deleted by the caller.
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*
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* DESCRIPTION: Ensure allocated name string is long enough,
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* and set up prefix if any.
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*
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****************************************************************************/
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char *
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AcpiAmlAllocateNameString (
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INT32 PrefixCount,
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INT32 NumNameSegs)
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{
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char *TempPtr;
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char *NameString;
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INT32 SizeNeeded;
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FUNCTION_TRACE ("AmlAllocateNameString");
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/*
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* Allow room for all \ and ^ prefixes, all segments, and a MultiNamePrefix.
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* This may actually be somewhat longer than needed.
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*/
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if (PrefixCount < 0)
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{
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SizeNeeded = 1 /* root */ + (ACPI_NAME_SIZE * NumNameSegs) + 2 +1; /* zero terminate */
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}
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else
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{
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SizeNeeded = PrefixCount + (ACPI_NAME_SIZE * NumNameSegs) + 2 +1; /* zero terminate */
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}
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/*
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* Allocate a buffer for the name.
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* This buffer must be deleted by the caller!
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*/
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NameString = AcpiCmAllocate ((ACPI_SIZE) SizeNeeded);
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if (!NameString)
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{
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/* Allocation failure */
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REPORT_ERROR ("AmlAllocateNameString: name allocation failure");
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return_PTR (NULL);
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}
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TempPtr = NameString;
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/* Set up Root or Parent prefixes if needed */
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if (PrefixCount < 0)
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{
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*TempPtr++ = AML_ROOT_PREFIX;
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}
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else
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{
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while (PrefixCount--)
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{
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*TempPtr++ = AML_PARENT_PREFIX;
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}
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}
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/* Set up Dual or Multi prefixes if needed */
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if (NumNameSegs > 2)
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{
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/* Set up multi prefixes */
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*TempPtr++ = AML_MULTI_NAME_PREFIX_OP;
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*TempPtr++ = (char) NumNameSegs;
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}
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else if (2 == NumNameSegs)
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{
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/* Set up dual prefixes */
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*TempPtr++ = AML_DUAL_NAME_PREFIX;
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}
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/* Terminate string following prefixes. AcpiAmlExecNameSegment() will append the segment(s) */
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*TempPtr = 0;
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return_PTR (NameString);
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}
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/*****************************************************************************
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*
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* FUNCTION: AcpiAmlDecodePackageLength
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*
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* PARAMETERS: LastPkgLen - latest value decoded by DoPkgLength() for
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* most recently examined package or field
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*
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* RETURN: Number of bytes contained in package length encoding
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*
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* DESCRIPTION: Decodes the Package Length. Upper 2 bits are are used to
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* tell if type 1, 2, 3, or 4.
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* 0x3F = Max 1 byte encoding,
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* 0xFFF = Max 2 byte encoding,
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* 0xFFFFF = Max 3 Byte encoding,
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* 0xFFFFFFFFF = Max 4 Byte encoding.
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*
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****************************************************************************/
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INT32
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AcpiAmlDecodePackageLength (
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INT32 LastPkgLen)
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{
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INT32 NumBytes = 0;
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FUNCTION_TRACE ("AmlDecodePackageLength");
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if (LastPkgLen < PKG_TYPE1)
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{
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NumBytes = 1;
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}
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else if (LastPkgLen < PKG_TYPE2)
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{
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NumBytes = 2;
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}
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else if (LastPkgLen < PKG_TYPE3)
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{
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NumBytes = 3;
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}
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else if (LastPkgLen < PKG_TYPE4)
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{
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NumBytes = 4;
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}
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return_VALUE (NumBytes);
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}
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/*****************************************************************************
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*
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* FUNCTION: AcpiAmlExecNameSegment
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*
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* PARAMETERS: InterpreterMode - Current running mode (load1/Load2/Exec)
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute a name segment (4 bytes)
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*
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****************************************************************************/
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ACPI_STATUS
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AcpiAmlExecNameSegment (
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UINT8 **InAmlAddress,
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char *NameString)
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{
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UINT8 *AmlAddress = *InAmlAddress;
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ACPI_STATUS Status = AE_OK;
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INT32 Index;
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char CharBuf[5];
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FUNCTION_TRACE ("AmlExecNameSegment");
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/* If first character is a digit, we aren't looking at a valid name segment */
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CharBuf[0] = *AmlAddress;
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if ('0' <= CharBuf[0] && CharBuf[0] <= '9')
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{
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DEBUG_PRINT (ACPI_ERROR, ("AmlExecNameSegment: leading digit: %c\n", CharBuf[0]));
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return_ACPI_STATUS (AE_CTRL_PENDING);
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}
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DEBUG_PRINT (TRACE_LOAD, ("AmlExecNameSegment: Bytes from stream:\n"));
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for (Index = 4; (Index > 0) && (AcpiCmValidAcpiCharacter (*AmlAddress)); --Index)
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{
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CharBuf[4 - Index] = *AmlAddress++;
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DEBUG_PRINT (TRACE_LOAD, ("%c\n", CharBuf[4 - Index]));
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}
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/* Valid name segment */
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if (0 == Index)
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{
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/* Found 4 valid characters */
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CharBuf[4] = '\0';
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if (NameString)
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{
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STRCAT (NameString, CharBuf);
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DEBUG_PRINT (TRACE_NAMES, ("AmlExecNameSegment: Appended to - %s \n", NameString));
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}
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else
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{
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DEBUG_PRINT (TRACE_NAMES, ("AmlExecNameSegment: No Name string - %s \n", CharBuf));
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}
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}
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else if (4 == Index)
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{
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/*
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* First character was not a valid name character,
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* so we are looking at something other than a name.
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*/
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DEBUG_PRINT (ACPI_INFO, ("AmlExecNameSegment: Leading char not alpha: %02Xh (not a name)\n", CharBuf[0]));
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Status = AE_CTRL_PENDING;
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}
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else
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{
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/* Segment started with one or more valid characters, but fewer than 4 */
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Status = AE_AML_BAD_NAME;
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DEBUG_PRINT (ACPI_ERROR, ("AmlExecNameSegment: Bad char %02x in name, at %p\n", *AmlAddress, AmlAddress));
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}
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DEBUG_PRINT (TRACE_EXEC, ("Leave AcpiAmlExecNameSegment %s \n", AcpiCmFormatException (Status)));
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*InAmlAddress = AmlAddress;
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return_ACPI_STATUS (Status);
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}
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/*****************************************************************************
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*
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* FUNCTION: AcpiAmlGetNameString
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*
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* PARAMETERS: DataType - Data type to be associated with this name
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*
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* RETURN: Status
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*
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* DESCRIPTION: Get a name, including any prefixes.
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*
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****************************************************************************/
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ACPI_STATUS
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AcpiAmlGetNameString (
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OBJECT_TYPE_INTERNAL DataType,
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UINT8 *InAmlAddress,
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char **OutNameString,
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UINT32 *OutNameLength)
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{
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ACPI_STATUS Status = AE_OK;
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UINT8 *AmlAddress = InAmlAddress;
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char *NameString = NULL;
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INT32 NumSegments;
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INT32 PrefixCount = 0;
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UINT8 Prefix = 0;
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FUNCTION_TRACE_PTR ("AmlGetNameString", AmlAddress);
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if (INTERNAL_TYPE_DEF_FIELD == DataType ||
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INTERNAL_TYPE_BANK_FIELD == DataType ||
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INTERNAL_TYPE_INDEX_FIELD == DataType)
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{
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/* Disallow prefixes for types associated with field names */
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NameString = AcpiAmlAllocateNameString (0, 1);
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if (!NameString)
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{
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Status = AE_NO_MEMORY;
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}
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else
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{
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Status = AcpiAmlExecNameSegment (&AmlAddress, NameString);
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}
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}
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else
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{
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/* DataType is not a field name */
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switch (*AmlAddress)
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{
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/* Examine first character of name for root or parent prefix operators */
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case AML_ROOT_PREFIX:
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Prefix = *AmlAddress++;
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DEBUG_PRINT (TRACE_LOAD, ("RootPrefix: %x\n", Prefix));
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/*
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* Remember that we have a RootPrefix --
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* see comment in AcpiAmlAllocateNameString()
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*/
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PrefixCount = -1;
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break;
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case AML_PARENT_PREFIX:
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do
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{
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Prefix = *AmlAddress++;
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DEBUG_PRINT (TRACE_LOAD, ("ParentPrefix: %x\n", Prefix));
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++PrefixCount;
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} while (*AmlAddress == AML_PARENT_PREFIX);
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break;
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default:
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break;
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}
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switch (*AmlAddress)
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{
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/* Examine first character of name for name segment prefix operator */
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case AML_DUAL_NAME_PREFIX:
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Prefix = *AmlAddress++;
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DEBUG_PRINT (TRACE_LOAD, ("DualNamePrefix: %x\n", Prefix));
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NameString = AcpiAmlAllocateNameString (PrefixCount, 2);
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if (!NameString)
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{
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Status = AE_NO_MEMORY;
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break;
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}
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/* Ensure PrefixCount != 0 to remember processing a prefix */
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PrefixCount += 2;
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if ((Status = AcpiAmlExecNameSegment (&AmlAddress, NameString)) == AE_OK)
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{
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Status = AcpiAmlExecNameSegment (&AmlAddress, NameString);
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}
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break;
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case AML_MULTI_NAME_PREFIX_OP:
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Prefix = *AmlAddress++;
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DEBUG_PRINT (TRACE_LOAD, ("MultiNamePrefix: %x\n", Prefix));
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NumSegments = *AmlAddress++; /* fetch count of segments */
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NameString = AcpiAmlAllocateNameString (PrefixCount, NumSegments);
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if (!NameString)
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{
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Status = AE_NO_MEMORY;
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break;
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}
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/* Ensure PrefixCount != 0 to remember processing a prefix */
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PrefixCount += 2;
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while (NumSegments && (Status = AcpiAmlExecNameSegment (&AmlAddress, NameString)) == AE_OK)
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{
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--NumSegments;
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}
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break;
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case 0:
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/* NullName valid as of 8-12-98 ASL/AML Grammar Update */
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if (-1 == PrefixCount)
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{
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/* RootPrefix followed by NULL */
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DEBUG_PRINT (TRACE_EXEC, ("AmlDoName: NameSeg is \"\\\" followed by NULL\n"));
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}
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AmlAddress++; /* consume NULL byte */
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NameString = AcpiAmlAllocateNameString (PrefixCount, 0);
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if (!NameString)
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{
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Status = AE_NO_MEMORY;
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break;
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}
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break;
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default:
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/* Name segment string */
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NameString = AcpiAmlAllocateNameString (PrefixCount, 1);
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if (!NameString)
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{
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Status = AE_NO_MEMORY;
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break;
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}
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Status = AcpiAmlExecNameSegment (&AmlAddress, NameString);
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break;
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} /* Switch (PeekOp ()) */
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}
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if (AE_CTRL_PENDING == Status && PrefixCount != 0)
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{
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/* Ran out of segments after processing a prefix */
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DEBUG_PRINT (ACPI_ERROR, ("AmlDoName: Malformed Name at %p\n", NameString));
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REPORT_ERROR ("Ran out of segments after processing a prefix");
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Status = AE_AML_BAD_NAME;
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}
|
|
|
|
|
|
*OutNameString = NameString;
|
|
*OutNameLength = (UINT32) (AmlAddress - InAmlAddress);
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|