diff options
Diffstat (limited to 'sys/contrib/dev/acpica/components/namespace/nsparse.c')
| -rw-r--r-- | sys/contrib/dev/acpica/components/namespace/nsparse.c | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/components/namespace/nsparse.c b/sys/contrib/dev/acpica/components/namespace/nsparse.c new file mode 100644 index 0000000..44c5b89 --- /dev/null +++ b/sys/contrib/dev/acpica/components/namespace/nsparse.c @@ -0,0 +1,225 @@ +/****************************************************************************** + * + * Module Name: nsparse - namespace interface to AML parser + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2012, Intel Corp. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + */ + +#define __NSPARSE_C__ + +#include <contrib/dev/acpica/include/acpi.h> +#include <contrib/dev/acpica/include/accommon.h> +#include <contrib/dev/acpica/include/acnamesp.h> +#include <contrib/dev/acpica/include/acparser.h> +#include <contrib/dev/acpica/include/acdispat.h> +#include <contrib/dev/acpica/include/actables.h> + + +#define _COMPONENT ACPI_NAMESPACE + ACPI_MODULE_NAME ("nsparse") + + +/******************************************************************************* + * + * FUNCTION: NsOneCompleteParse + * + * PARAMETERS: PassNumber - 1 or 2 + * TableDesc - The table to be parsed. + * + * RETURN: Status + * + * DESCRIPTION: Perform one complete parse of an ACPI/AML table. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiNsOneCompleteParse ( + UINT32 PassNumber, + UINT32 TableIndex, + ACPI_NAMESPACE_NODE *StartNode) +{ + ACPI_PARSE_OBJECT *ParseRoot; + ACPI_STATUS Status; + UINT32 AmlLength; + UINT8 *AmlStart; + ACPI_WALK_STATE *WalkState; + ACPI_TABLE_HEADER *Table; + ACPI_OWNER_ID OwnerId; + + + ACPI_FUNCTION_TRACE (NsOneCompleteParse); + + + Status = AcpiTbGetOwnerId (TableIndex, &OwnerId); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + /* Create and init a Root Node */ + + ParseRoot = AcpiPsCreateScopeOp (); + if (!ParseRoot) + { + return_ACPI_STATUS (AE_NO_MEMORY); + } + + /* Create and initialize a new walk state */ + + WalkState = AcpiDsCreateWalkState (OwnerId, NULL, NULL, NULL); + if (!WalkState) + { + AcpiPsFreeOp (ParseRoot); + return_ACPI_STATUS (AE_NO_MEMORY); + } + + Status = AcpiGetTableByIndex (TableIndex, &Table); + if (ACPI_FAILURE (Status)) + { + AcpiDsDeleteWalkState (WalkState); + AcpiPsFreeOp (ParseRoot); + return_ACPI_STATUS (Status); + } + + /* Table must consist of at least a complete header */ + + if (Table->Length < sizeof (ACPI_TABLE_HEADER)) + { + Status = AE_BAD_HEADER; + } + else + { + AmlStart = (UINT8 *) Table + sizeof (ACPI_TABLE_HEADER); + AmlLength = Table->Length - sizeof (ACPI_TABLE_HEADER); + Status = AcpiDsInitAmlWalk (WalkState, ParseRoot, NULL, + AmlStart, AmlLength, NULL, (UINT8) PassNumber); + } + + if (ACPI_FAILURE (Status)) + { + AcpiDsDeleteWalkState (WalkState); + goto Cleanup; + } + + /* StartNode is the default location to load the table */ + + if (StartNode && StartNode != AcpiGbl_RootNode) + { + Status = AcpiDsScopeStackPush (StartNode, ACPI_TYPE_METHOD, WalkState); + if (ACPI_FAILURE (Status)) + { + AcpiDsDeleteWalkState (WalkState); + goto Cleanup; + } + } + + /* Parse the AML */ + + ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "*PARSE* pass %u parse\n", PassNumber)); + Status = AcpiPsParseAml (WalkState); + +Cleanup: + AcpiPsDeleteParseTree (ParseRoot); + return_ACPI_STATUS (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiNsParseTable + * + * PARAMETERS: TableDesc - An ACPI table descriptor for table to parse + * StartNode - Where to enter the table into the namespace + * + * RETURN: Status + * + * DESCRIPTION: Parse AML within an ACPI table and return a tree of ops + * + ******************************************************************************/ + +ACPI_STATUS +AcpiNsParseTable ( + UINT32 TableIndex, + ACPI_NAMESPACE_NODE *StartNode) +{ + ACPI_STATUS Status; + + + ACPI_FUNCTION_TRACE (NsParseTable); + + + /* + * AML Parse, pass 1 + * + * In this pass, we load most of the namespace. Control methods + * are not parsed until later. A parse tree is not created. Instead, + * each Parser Op subtree is deleted when it is finished. This saves + * a great deal of memory, and allows a small cache of parse objects + * to service the entire parse. The second pass of the parse then + * performs another complete parse of the AML. + */ + ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "**** Start pass 1\n")); + Status = AcpiNsOneCompleteParse (ACPI_IMODE_LOAD_PASS1, + TableIndex, StartNode); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + /* + * AML Parse, pass 2 + * + * In this pass, we resolve forward references and other things + * that could not be completed during the first pass. + * Another complete parse of the AML is performed, but the + * overhead of this is compensated for by the fact that the + * parse objects are all cached. + */ + ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "**** Start pass 2\n")); + Status = AcpiNsOneCompleteParse (ACPI_IMODE_LOAD_PASS2, + TableIndex, StartNode); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + return_ACPI_STATUS (Status); +} + + |
