diff options
Diffstat (limited to 'sys/contrib/dev/acpica/psfind.c')
| -rw-r--r-- | sys/contrib/dev/acpica/psfind.c | 459 |
1 files changed, 459 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/psfind.c b/sys/contrib/dev/acpica/psfind.c new file mode 100644 index 000000000000..a0a92364db00 --- /dev/null +++ b/sys/contrib/dev/acpica/psfind.c @@ -0,0 +1,459 @@ + +/****************************************************************************** + * + * Module Name: psfind - Parse tree search routine + * $Revision: 17 $ + * + *****************************************************************************/ + +/****************************************************************************** + * + * 1. Copyright Notice + * + * Some or all of this work - Copyright (c) 1999, 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 __PSFIND_C__ + +#include "acpi.h" +#include "acparser.h" +#include "amlcode.h" + +#define _COMPONENT PARSER + MODULE_NAME ("psfind") + + +/******************************************************************************* + * + * FUNCTION: AcpiPsGetParent + * + * PARAMETERS: Op - Get the parent of this Op + * + * RETURN: The Parent op. + * + * DESCRIPTION: Get op's parent + * + ******************************************************************************/ + +ACPI_PARSE_OBJECT* +AcpiPsGetParent ( + ACPI_PARSE_OBJECT *Op) +{ + ACPI_PARSE_OBJECT *Parent = Op; + + + /* Traverse the tree upward (to root if necessary) */ + + while (Parent) + { + switch (Parent->Opcode) + { + case AML_SCOPE_OP: + case AML_PACKAGE_OP: + case AML_METHOD_OP: + case AML_DEVICE_OP: + case AML_POWER_RES_OP: + case AML_THERMAL_ZONE_OP: + + return (Parent->Parent); + } + + Parent = Parent->Parent; + } + + return (Parent); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiPsFindName + * + * PARAMETERS: Scope - Scope to search + * Name - ACPI name to search for + * Opcode - Opcode to search for + * + * RETURN: Op containing the name + * + * DESCRIPTION: Find name segment from a list of acpi_ops. Searches a single + * scope, no more. + * + ******************************************************************************/ + +ACPI_PARSE_OBJECT * +AcpiPsFindName ( + ACPI_PARSE_OBJECT *Scope, + UINT32 Name, + UINT32 Opcode) +{ + ACPI_PARSE_OBJECT *Op; + ACPI_PARSE_OBJECT *Field; + + + /* search scope level for matching name segment */ + + Op = AcpiPsGetChild (Scope); + + while (Op) + { + + if (AcpiPsIsFieldOp (Op->Opcode)) + { + /* Field, search named fields */ + + Field = AcpiPsGetChild (Op); + while (Field) + { + if (AcpiPsIsNamedOp (Field->Opcode) && + AcpiPsGetName (Field) == Name && + (!Opcode || Field->Opcode == Opcode)) + { + return (Field); + } + + Field = Field->Next; + } + } + + else if (AcpiPsIsCreateFieldOp (Op->Opcode)) + { + if (Op->Opcode == AML_CREATE_FIELD_OP) + { + Field = AcpiPsGetArg (Op, 3); + } + + else + { + /* CreateXXXField, check name */ + + Field = AcpiPsGetArg (Op, 2); + } + + if ((Field) && + (Field->Value.String) && + (!STRNCMP (Field->Value.String, (char *) &Name, ACPI_NAME_SIZE))) + { + return (Op); + } + } + + else if ((AcpiPsIsNamedOp (Op->Opcode)) && + (AcpiPsGetName (Op) == Name) && + (!Opcode || Op->Opcode == Opcode || Opcode == AML_SCOPE_OP)) + { + break; + } + + Op = Op->Next; + } + + return (Op); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiPsFind + * + * PARAMETERS: Scope - Where to begin the search + * Path - ACPI Path to the named object + * Opcode - Opcode associated with the object + * Create - if TRUE, create the object if not found. + * + * RETURN: Op if found, NULL otherwise. + * + * DESCRIPTION: Find object within scope + * + ******************************************************************************/ + +ACPI_PARSE_OBJECT* +AcpiPsFind ( + ACPI_PARSE_OBJECT *Scope, + NATIVE_CHAR *Path, + UINT16 Opcode, + UINT32 Create) +{ + UINT32 SegCount; + UINT32 Name; + UINT32 NameOp; + ACPI_PARSE_OBJECT *Op = NULL; + BOOLEAN Unprefixed = TRUE; + + + FUNCTION_TRACE_PTR ("PsFind", Scope); + + + if (!Scope || !Path) + { + DEBUG_PRINT (TRACE_PARSE, ("PsFind: Null path (%p) or scope (%p)!\n", Path, Scope)); + return_VALUE (NULL); + } + + + AcpiGbl_PsFindCount++; + + + /* Handle all prefixes in the name path */ + + while (AcpiPsIsPrefixChar (GET8 (Path))) + { + switch (GET8 (Path)) + { + + case '\\': + + /* Could just use a global for "root scope" here */ + + while (Scope->Parent) + { + Scope = Scope->Parent; + } + + /* get first object within the scope */ + /* TBD: [Investigate] OR - set next in root scope to point to the same value as arg */ + + /* Scope = Scope->Value.Arg; */ + + break; + + + case '^': + + /* Go up to the next valid scoping Op (method, scope, etc.) */ + + if (AcpiPsGetParent (Scope)) + { + Scope = AcpiPsGetParent (Scope); + } + + break; + } + + Unprefixed = FALSE; + Path++; + } + + /* get name segment count */ + + switch (GET8 (Path)) + { + case '\0': + SegCount = 0; + + /* Null name case */ + + if (Unprefixed) + { + Op = NULL; + } + else + { + Op = Scope; + } + + + DEBUG_PRINT (TRACE_PARSE, ("PsFind: Null path, returning current root scope Op=%p\n", Op)); + return_PTR (Op); + break; + + case AML_DUAL_NAME_PREFIX: + SegCount = 2; + Path++; + break; + + case AML_MULTI_NAME_PREFIX_OP: + SegCount = GET8 (Path + 1); + Path += 2; + break; + + default: + SegCount = 1; + break; + } + + DEBUG_PRINT (TRACE_PARSE, ("PsFind: Search scope %p Segs=%d Opcode=%4.4X Create=%d\n", Scope, SegCount, Opcode, Create)); + + /* match each name segment */ + + while (Scope && SegCount) + { + MOVE_UNALIGNED32_TO_32 (&Name, Path); + Path += 4; + SegCount --; + + if (SegCount) + { + NameOp = 0; + } + else + { + NameOp = Opcode; + } + + Op = AcpiPsFindName (Scope, Name, NameOp); + if (Op) + { + DEBUG_PRINT (TRACE_PARSE, ("PsFind: [%4.4s] Found! Op=%p Opcode=%4.4X\n", &Name, Op, Op->Opcode)); + } + + if (!Op) + { + if (Create) + { + /* Create a new Scope level */ + + if (SegCount) + { + Op = AcpiPsAllocOp (AML_SCOPE_OP); + } + else + { + Op = AcpiPsAllocOp (Opcode); + } + + if (Op) + { + AcpiPsSetName (Op, Name); + AcpiPsAppendArg (Scope, Op); + + DEBUG_PRINT (TRACE_PARSE, ("PsFind: [%4.4s] Not found, created Op=%p Opcode=%4.4X\n", &Name, Op, Opcode)); + } + } + + else if (Unprefixed) + { + /* Search higher scopes for unprefixed name */ + + while (!Op && Scope->Parent) + { + Scope = Scope->Parent; + Op = AcpiPsFindName (Scope, Name, Opcode); + if (Op) + { + DEBUG_PRINT (TRACE_PARSE, ("PsFind: [%4.4s] Found in parent tree! Op=%p Opcode=%4.4X\n", &Name, Op, Op->Opcode)); + } + + else + { + DEBUG_PRINT (TRACE_PARSE, ("PsFind: [%4.4s] Not found in parent=%p\n", &Name, Scope)); + } + } + } + + else + { + DEBUG_PRINT (TRACE_PARSE, ("PsFind: Segment [%4.4s] Not Found in scope %p!\n", &Name, Scope)); + } + } + + Unprefixed = FALSE; + Scope = Op; + } + + return_PTR (Op); +} + + |