926 lines
24 KiB
C
926 lines
24 KiB
C
/*******************************************************************************
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*
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* Module Name: utresrc - Resource management utilities
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*
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******************************************************************************/
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/*
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* Copyright (C) 2000 - 2014, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#define __UTRESRC_C__
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#include "acpi.h"
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#include "accommon.h"
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#include "acresrc.h"
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#define _COMPONENT ACPI_UTILITIES
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ACPI_MODULE_NAME ("utresrc")
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#if defined(ACPI_DEBUG_OUTPUT) || defined (ACPI_DISASSEMBLER) || defined (ACPI_DEBUGGER)
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/*
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* Strings used to decode resource descriptors.
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* Used by both the disassembler and the debugger resource dump routines
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*/
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const char *AcpiGbl_BmDecode[] =
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{
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"NotBusMaster",
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"BusMaster"
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};
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const char *AcpiGbl_ConfigDecode[] =
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{
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"0 - Good Configuration",
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"1 - Acceptable Configuration",
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"2 - Suboptimal Configuration",
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"3 - ***Invalid Configuration***",
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};
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const char *AcpiGbl_ConsumeDecode[] =
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{
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"ResourceProducer",
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"ResourceConsumer"
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};
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const char *AcpiGbl_DecDecode[] =
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{
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"PosDecode",
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"SubDecode"
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};
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const char *AcpiGbl_HeDecode[] =
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{
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"Level",
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"Edge"
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};
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const char *AcpiGbl_IoDecode[] =
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{
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"Decode10",
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"Decode16"
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};
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const char *AcpiGbl_LlDecode[] =
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{
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"ActiveHigh",
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"ActiveLow"
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};
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const char *AcpiGbl_MaxDecode[] =
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{
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"MaxNotFixed",
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"MaxFixed"
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};
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const char *AcpiGbl_MemDecode[] =
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{
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"NonCacheable",
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"Cacheable",
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"WriteCombining",
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"Prefetchable"
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};
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const char *AcpiGbl_MinDecode[] =
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{
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"MinNotFixed",
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"MinFixed"
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};
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const char *AcpiGbl_MtpDecode[] =
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{
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"AddressRangeMemory",
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"AddressRangeReserved",
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"AddressRangeACPI",
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"AddressRangeNVS"
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};
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const char *AcpiGbl_RngDecode[] =
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{
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"InvalidRanges",
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"NonISAOnlyRanges",
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"ISAOnlyRanges",
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"EntireRange"
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};
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const char *AcpiGbl_RwDecode[] =
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{
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"ReadOnly",
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"ReadWrite"
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};
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const char *AcpiGbl_ShrDecode[] =
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{
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"Exclusive",
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"Shared",
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"ExclusiveAndWake", /* ACPI 5.0 */
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"SharedAndWake" /* ACPI 5.0 */
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};
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const char *AcpiGbl_SizDecode[] =
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{
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"Transfer8",
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"Transfer8_16",
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"Transfer16",
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"InvalidSize"
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};
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const char *AcpiGbl_TrsDecode[] =
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{
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"DenseTranslation",
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"SparseTranslation"
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};
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const char *AcpiGbl_TtpDecode[] =
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{
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"TypeStatic",
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"TypeTranslation"
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};
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const char *AcpiGbl_TypDecode[] =
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{
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"Compatibility",
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"TypeA",
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"TypeB",
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"TypeF"
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};
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const char *AcpiGbl_PpcDecode[] =
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{
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"PullDefault",
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"PullUp",
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"PullDown",
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"PullNone"
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};
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const char *AcpiGbl_IorDecode[] =
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{
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"IoRestrictionNone",
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"IoRestrictionInputOnly",
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"IoRestrictionOutputOnly",
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"IoRestrictionNoneAndPreserve"
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};
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const char *AcpiGbl_DtsDecode[] =
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{
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"Width8bit",
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"Width16bit",
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"Width32bit",
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"Width64bit",
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"Width128bit",
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"Width256bit",
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};
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/* GPIO connection type */
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const char *AcpiGbl_CtDecode[] =
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{
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"Interrupt",
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"I/O"
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};
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/* Serial bus type */
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const char *AcpiGbl_SbtDecode[] =
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{
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"/* UNKNOWN serial bus type */",
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"I2C",
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"SPI",
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"UART"
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};
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/* I2C serial bus access mode */
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const char *AcpiGbl_AmDecode[] =
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{
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"AddressingMode7Bit",
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"AddressingMode10Bit"
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};
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/* I2C serial bus slave mode */
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const char *AcpiGbl_SmDecode[] =
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{
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"ControllerInitiated",
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"DeviceInitiated"
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};
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/* SPI serial bus wire mode */
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const char *AcpiGbl_WmDecode[] =
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{
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"FourWireMode",
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"ThreeWireMode"
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};
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/* SPI serial clock phase */
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const char *AcpiGbl_CphDecode[] =
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{
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"ClockPhaseFirst",
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"ClockPhaseSecond"
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};
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/* SPI serial bus clock polarity */
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const char *AcpiGbl_CpoDecode[] =
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{
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"ClockPolarityLow",
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"ClockPolarityHigh"
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};
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/* SPI serial bus device polarity */
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const char *AcpiGbl_DpDecode[] =
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{
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"PolarityLow",
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"PolarityHigh"
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};
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/* UART serial bus endian */
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const char *AcpiGbl_EdDecode[] =
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{
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"LittleEndian",
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"BigEndian"
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};
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/* UART serial bus bits per byte */
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const char *AcpiGbl_BpbDecode[] =
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{
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"DataBitsFive",
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"DataBitsSix",
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"DataBitsSeven",
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"DataBitsEight",
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"DataBitsNine",
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"/* UNKNOWN Bits per byte */",
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"/* UNKNOWN Bits per byte */",
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"/* UNKNOWN Bits per byte */"
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};
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/* UART serial bus stop bits */
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const char *AcpiGbl_SbDecode[] =
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{
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"StopBitsNone",
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"StopBitsOne",
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"StopBitsOnePlusHalf",
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"StopBitsTwo"
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};
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/* UART serial bus flow control */
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const char *AcpiGbl_FcDecode[] =
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{
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"FlowControlNone",
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"FlowControlHardware",
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"FlowControlXON",
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"/* UNKNOWN flow control keyword */"
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};
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/* UART serial bus parity type */
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const char *AcpiGbl_PtDecode[] =
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{
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"ParityTypeNone",
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"ParityTypeEven",
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"ParityTypeOdd",
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"ParityTypeMark",
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"ParityTypeSpace",
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"/* UNKNOWN parity keyword */",
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"/* UNKNOWN parity keyword */",
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"/* UNKNOWN parity keyword */"
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};
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#endif
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/*
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* Base sizes of the raw AML resource descriptors, indexed by resource type.
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* Zero indicates a reserved (and therefore invalid) resource type.
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*/
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const UINT8 AcpiGbl_ResourceAmlSizes[] =
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{
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/* Small descriptors */
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0,
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0,
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0,
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0,
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ACPI_AML_SIZE_SMALL (AML_RESOURCE_IRQ),
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ACPI_AML_SIZE_SMALL (AML_RESOURCE_DMA),
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ACPI_AML_SIZE_SMALL (AML_RESOURCE_START_DEPENDENT),
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ACPI_AML_SIZE_SMALL (AML_RESOURCE_END_DEPENDENT),
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ACPI_AML_SIZE_SMALL (AML_RESOURCE_IO),
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ACPI_AML_SIZE_SMALL (AML_RESOURCE_FIXED_IO),
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ACPI_AML_SIZE_SMALL (AML_RESOURCE_FIXED_DMA),
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0,
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0,
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0,
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ACPI_AML_SIZE_SMALL (AML_RESOURCE_VENDOR_SMALL),
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ACPI_AML_SIZE_SMALL (AML_RESOURCE_END_TAG),
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/* Large descriptors */
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0,
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ACPI_AML_SIZE_LARGE (AML_RESOURCE_MEMORY24),
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ACPI_AML_SIZE_LARGE (AML_RESOURCE_GENERIC_REGISTER),
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0,
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ACPI_AML_SIZE_LARGE (AML_RESOURCE_VENDOR_LARGE),
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ACPI_AML_SIZE_LARGE (AML_RESOURCE_MEMORY32),
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ACPI_AML_SIZE_LARGE (AML_RESOURCE_FIXED_MEMORY32),
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ACPI_AML_SIZE_LARGE (AML_RESOURCE_ADDRESS32),
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ACPI_AML_SIZE_LARGE (AML_RESOURCE_ADDRESS16),
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ACPI_AML_SIZE_LARGE (AML_RESOURCE_EXTENDED_IRQ),
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ACPI_AML_SIZE_LARGE (AML_RESOURCE_ADDRESS64),
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ACPI_AML_SIZE_LARGE (AML_RESOURCE_EXTENDED_ADDRESS64),
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ACPI_AML_SIZE_LARGE (AML_RESOURCE_GPIO),
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0,
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ACPI_AML_SIZE_LARGE (AML_RESOURCE_COMMON_SERIALBUS),
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};
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const UINT8 AcpiGbl_ResourceAmlSerialBusSizes[] =
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{
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0,
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ACPI_AML_SIZE_LARGE (AML_RESOURCE_I2C_SERIALBUS),
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ACPI_AML_SIZE_LARGE (AML_RESOURCE_SPI_SERIALBUS),
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ACPI_AML_SIZE_LARGE (AML_RESOURCE_UART_SERIALBUS),
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};
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/*
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* Resource types, used to validate the resource length field.
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* The length of fixed-length types must match exactly, variable
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* lengths must meet the minimum required length, etc.
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* Zero indicates a reserved (and therefore invalid) resource type.
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*/
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static const UINT8 AcpiGbl_ResourceTypes[] =
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{
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/* Small descriptors */
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0,
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0,
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0,
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0,
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ACPI_SMALL_VARIABLE_LENGTH, /* 04 IRQ */
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ACPI_FIXED_LENGTH, /* 05 DMA */
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ACPI_SMALL_VARIABLE_LENGTH, /* 06 StartDependentFunctions */
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ACPI_FIXED_LENGTH, /* 07 EndDependentFunctions */
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ACPI_FIXED_LENGTH, /* 08 IO */
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ACPI_FIXED_LENGTH, /* 09 FixedIO */
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ACPI_FIXED_LENGTH, /* 0A FixedDMA */
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0,
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0,
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0,
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ACPI_VARIABLE_LENGTH, /* 0E VendorShort */
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ACPI_FIXED_LENGTH, /* 0F EndTag */
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/* Large descriptors */
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0,
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ACPI_FIXED_LENGTH, /* 01 Memory24 */
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ACPI_FIXED_LENGTH, /* 02 GenericRegister */
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0,
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ACPI_VARIABLE_LENGTH, /* 04 VendorLong */
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ACPI_FIXED_LENGTH, /* 05 Memory32 */
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ACPI_FIXED_LENGTH, /* 06 Memory32Fixed */
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ACPI_VARIABLE_LENGTH, /* 07 Dword* address */
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ACPI_VARIABLE_LENGTH, /* 08 Word* address */
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ACPI_VARIABLE_LENGTH, /* 09 ExtendedIRQ */
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ACPI_VARIABLE_LENGTH, /* 0A Qword* address */
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ACPI_FIXED_LENGTH, /* 0B Extended* address */
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ACPI_VARIABLE_LENGTH, /* 0C Gpio* */
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0,
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ACPI_VARIABLE_LENGTH /* 0E *SerialBus */
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};
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/*******************************************************************************
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*
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* FUNCTION: AcpiUtWalkAmlResources
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*
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* PARAMETERS: WalkState - Current walk info
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* PARAMETERS: Aml - Pointer to the raw AML resource template
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* AmlLength - Length of the entire template
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* UserFunction - Called once for each descriptor found. If
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* NULL, a pointer to the EndTag is returned
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* Context - Passed to UserFunction
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*
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* RETURN: Status
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*
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* DESCRIPTION: Walk a raw AML resource list(buffer). User function called
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* once for each resource found.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiUtWalkAmlResources (
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ACPI_WALK_STATE *WalkState,
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UINT8 *Aml,
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ACPI_SIZE AmlLength,
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ACPI_WALK_AML_CALLBACK UserFunction,
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void **Context)
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{
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ACPI_STATUS Status;
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UINT8 *EndAml;
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UINT8 ResourceIndex;
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UINT32 Length;
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UINT32 Offset = 0;
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UINT8 EndTag[2] = {0x79, 0x00};
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ACPI_FUNCTION_TRACE (UtWalkAmlResources);
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|
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/* The absolute minimum resource template is one EndTag descriptor */
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if (AmlLength < sizeof (AML_RESOURCE_END_TAG))
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{
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return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG);
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}
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|
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/* Point to the end of the resource template buffer */
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EndAml = Aml + AmlLength;
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|
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/* Walk the byte list, abort on any invalid descriptor type or length */
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while (Aml < EndAml)
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{
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/* Validate the Resource Type and Resource Length */
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Status = AcpiUtValidateResource (WalkState, Aml, &ResourceIndex);
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if (ACPI_FAILURE (Status))
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{
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/*
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* Exit on failure. Cannot continue because the descriptor length
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* may be bogus also.
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*/
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return_ACPI_STATUS (Status);
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}
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|
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/* Get the length of this descriptor */
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Length = AcpiUtGetDescriptorLength (Aml);
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|
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/* Invoke the user function */
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|
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if (UserFunction)
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{
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Status = UserFunction (Aml, Length, Offset, ResourceIndex, Context);
|
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if (ACPI_FAILURE (Status))
|
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{
|
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return_ACPI_STATUS (Status);
|
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}
|
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}
|
|
|
|
/* An EndTag descriptor terminates this resource template */
|
|
|
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if (AcpiUtGetResourceType (Aml) == ACPI_RESOURCE_NAME_END_TAG)
|
|
{
|
|
/*
|
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* There must be at least one more byte in the buffer for
|
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* the 2nd byte of the EndTag
|
|
*/
|
|
if ((Aml + 1) >= EndAml)
|
|
{
|
|
return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG);
|
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}
|
|
|
|
/* Return the pointer to the EndTag if requested */
|
|
|
|
if (!UserFunction)
|
|
{
|
|
*Context = Aml;
|
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}
|
|
|
|
/* Normal exit */
|
|
|
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return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
Aml += Length;
|
|
Offset += Length;
|
|
}
|
|
|
|
/* Did not find an EndTag descriptor */
|
|
|
|
if (UserFunction)
|
|
{
|
|
/* Insert an EndTag anyway. AcpiRsGetListLength always leaves room */
|
|
|
|
(void) AcpiUtValidateResource (WalkState, EndTag, &ResourceIndex);
|
|
Status = UserFunction (EndTag, 2, Offset, ResourceIndex, Context);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
}
|
|
|
|
return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG);
|
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}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiUtValidateResource
|
|
*
|
|
* PARAMETERS: WalkState - Current walk info
|
|
* Aml - Pointer to the raw AML resource descriptor
|
|
* ReturnIndex - Where the resource index is returned. NULL
|
|
* if the index is not required.
|
|
*
|
|
* RETURN: Status, and optionally the Index into the global resource tables
|
|
*
|
|
* DESCRIPTION: Validate an AML resource descriptor by checking the Resource
|
|
* Type and Resource Length. Returns an index into the global
|
|
* resource information/dispatch tables for later use.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiUtValidateResource (
|
|
ACPI_WALK_STATE *WalkState,
|
|
void *Aml,
|
|
UINT8 *ReturnIndex)
|
|
{
|
|
AML_RESOURCE *AmlResource;
|
|
UINT8 ResourceType;
|
|
UINT8 ResourceIndex;
|
|
ACPI_RS_LENGTH ResourceLength;
|
|
ACPI_RS_LENGTH MinimumResourceLength;
|
|
|
|
|
|
ACPI_FUNCTION_ENTRY ();
|
|
|
|
|
|
/*
|
|
* 1) Validate the ResourceType field (Byte 0)
|
|
*/
|
|
ResourceType = ACPI_GET8 (Aml);
|
|
|
|
/*
|
|
* Byte 0 contains the descriptor name (Resource Type)
|
|
* Examine the large/small bit in the resource header
|
|
*/
|
|
if (ResourceType & ACPI_RESOURCE_NAME_LARGE)
|
|
{
|
|
/* Verify the large resource type (name) against the max */
|
|
|
|
if (ResourceType > ACPI_RESOURCE_NAME_LARGE_MAX)
|
|
{
|
|
goto InvalidResource;
|
|
}
|
|
|
|
/*
|
|
* Large Resource Type -- bits 6:0 contain the name
|
|
* Translate range 0x80-0x8B to index range 0x10-0x1B
|
|
*/
|
|
ResourceIndex = (UINT8) (ResourceType - 0x70);
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* Small Resource Type -- bits 6:3 contain the name
|
|
* Shift range to index range 0x00-0x0F
|
|
*/
|
|
ResourceIndex = (UINT8)
|
|
((ResourceType & ACPI_RESOURCE_NAME_SMALL_MASK) >> 3);
|
|
}
|
|
|
|
/*
|
|
* Check validity of the resource type, via AcpiGbl_ResourceTypes. Zero
|
|
* indicates an invalid resource.
|
|
*/
|
|
if (!AcpiGbl_ResourceTypes[ResourceIndex])
|
|
{
|
|
goto InvalidResource;
|
|
}
|
|
|
|
/*
|
|
* Validate the ResourceLength field. This ensures that the length
|
|
* is at least reasonable, and guarantees that it is non-zero.
|
|
*/
|
|
ResourceLength = AcpiUtGetResourceLength (Aml);
|
|
MinimumResourceLength = AcpiGbl_ResourceAmlSizes[ResourceIndex];
|
|
|
|
/* Validate based upon the type of resource - fixed length or variable */
|
|
|
|
switch (AcpiGbl_ResourceTypes[ResourceIndex])
|
|
{
|
|
case ACPI_FIXED_LENGTH:
|
|
|
|
/* Fixed length resource, length must match exactly */
|
|
|
|
if (ResourceLength != MinimumResourceLength)
|
|
{
|
|
goto BadResourceLength;
|
|
}
|
|
break;
|
|
|
|
case ACPI_VARIABLE_LENGTH:
|
|
|
|
/* Variable length resource, length must be at least the minimum */
|
|
|
|
if (ResourceLength < MinimumResourceLength)
|
|
{
|
|
goto BadResourceLength;
|
|
}
|
|
break;
|
|
|
|
case ACPI_SMALL_VARIABLE_LENGTH:
|
|
|
|
/* Small variable length resource, length can be (Min) or (Min-1) */
|
|
|
|
if ((ResourceLength > MinimumResourceLength) ||
|
|
(ResourceLength < (MinimumResourceLength - 1)))
|
|
{
|
|
goto BadResourceLength;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
|
|
/* Shouldn't happen (because of validation earlier), but be sure */
|
|
|
|
goto InvalidResource;
|
|
}
|
|
|
|
AmlResource = ACPI_CAST_PTR (AML_RESOURCE, Aml);
|
|
if (ResourceType == ACPI_RESOURCE_NAME_SERIAL_BUS)
|
|
{
|
|
/* Validate the BusType field */
|
|
|
|
if ((AmlResource->CommonSerialBus.Type == 0) ||
|
|
(AmlResource->CommonSerialBus.Type > AML_RESOURCE_MAX_SERIALBUSTYPE))
|
|
{
|
|
if (WalkState)
|
|
{
|
|
ACPI_ERROR ((AE_INFO,
|
|
"Invalid/unsupported SerialBus resource descriptor: BusType 0x%2.2X",
|
|
AmlResource->CommonSerialBus.Type));
|
|
}
|
|
return (AE_AML_INVALID_RESOURCE_TYPE);
|
|
}
|
|
}
|
|
|
|
/* Optionally return the resource table index */
|
|
|
|
if (ReturnIndex)
|
|
{
|
|
*ReturnIndex = ResourceIndex;
|
|
}
|
|
|
|
return (AE_OK);
|
|
|
|
|
|
InvalidResource:
|
|
|
|
if (WalkState)
|
|
{
|
|
ACPI_ERROR ((AE_INFO,
|
|
"Invalid/unsupported resource descriptor: Type 0x%2.2X",
|
|
ResourceType));
|
|
}
|
|
return (AE_AML_INVALID_RESOURCE_TYPE);
|
|
|
|
BadResourceLength:
|
|
|
|
if (WalkState)
|
|
{
|
|
ACPI_ERROR ((AE_INFO,
|
|
"Invalid resource descriptor length: Type "
|
|
"0x%2.2X, Length 0x%4.4X, MinLength 0x%4.4X",
|
|
ResourceType, ResourceLength, MinimumResourceLength));
|
|
}
|
|
return (AE_AML_BAD_RESOURCE_LENGTH);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiUtGetResourceType
|
|
*
|
|
* PARAMETERS: Aml - Pointer to the raw AML resource descriptor
|
|
*
|
|
* RETURN: The Resource Type with no extraneous bits (except the
|
|
* Large/Small descriptor bit -- this is left alone)
|
|
*
|
|
* DESCRIPTION: Extract the Resource Type/Name from the first byte of
|
|
* a resource descriptor.
|
|
*
|
|
******************************************************************************/
|
|
|
|
UINT8
|
|
AcpiUtGetResourceType (
|
|
void *Aml)
|
|
{
|
|
ACPI_FUNCTION_ENTRY ();
|
|
|
|
|
|
/*
|
|
* Byte 0 contains the descriptor name (Resource Type)
|
|
* Examine the large/small bit in the resource header
|
|
*/
|
|
if (ACPI_GET8 (Aml) & ACPI_RESOURCE_NAME_LARGE)
|
|
{
|
|
/* Large Resource Type -- bits 6:0 contain the name */
|
|
|
|
return (ACPI_GET8 (Aml));
|
|
}
|
|
else
|
|
{
|
|
/* Small Resource Type -- bits 6:3 contain the name */
|
|
|
|
return ((UINT8) (ACPI_GET8 (Aml) & ACPI_RESOURCE_NAME_SMALL_MASK));
|
|
}
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiUtGetResourceLength
|
|
*
|
|
* PARAMETERS: Aml - Pointer to the raw AML resource descriptor
|
|
*
|
|
* RETURN: Byte Length
|
|
*
|
|
* DESCRIPTION: Get the "Resource Length" of a raw AML descriptor. By
|
|
* definition, this does not include the size of the descriptor
|
|
* header or the length field itself.
|
|
*
|
|
******************************************************************************/
|
|
|
|
UINT16
|
|
AcpiUtGetResourceLength (
|
|
void *Aml)
|
|
{
|
|
ACPI_RS_LENGTH ResourceLength;
|
|
|
|
|
|
ACPI_FUNCTION_ENTRY ();
|
|
|
|
|
|
/*
|
|
* Byte 0 contains the descriptor name (Resource Type)
|
|
* Examine the large/small bit in the resource header
|
|
*/
|
|
if (ACPI_GET8 (Aml) & ACPI_RESOURCE_NAME_LARGE)
|
|
{
|
|
/* Large Resource type -- bytes 1-2 contain the 16-bit length */
|
|
|
|
ACPI_MOVE_16_TO_16 (&ResourceLength, ACPI_ADD_PTR (UINT8, Aml, 1));
|
|
|
|
}
|
|
else
|
|
{
|
|
/* Small Resource type -- bits 2:0 of byte 0 contain the length */
|
|
|
|
ResourceLength = (UINT16) (ACPI_GET8 (Aml) &
|
|
ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK);
|
|
}
|
|
|
|
return (ResourceLength);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiUtGetResourceHeaderLength
|
|
*
|
|
* PARAMETERS: Aml - Pointer to the raw AML resource descriptor
|
|
*
|
|
* RETURN: Length of the AML header (depends on large/small descriptor)
|
|
*
|
|
* DESCRIPTION: Get the length of the header for this resource.
|
|
*
|
|
******************************************************************************/
|
|
|
|
UINT8
|
|
AcpiUtGetResourceHeaderLength (
|
|
void *Aml)
|
|
{
|
|
ACPI_FUNCTION_ENTRY ();
|
|
|
|
|
|
/* Examine the large/small bit in the resource header */
|
|
|
|
if (ACPI_GET8 (Aml) & ACPI_RESOURCE_NAME_LARGE)
|
|
{
|
|
return (sizeof (AML_RESOURCE_LARGE_HEADER));
|
|
}
|
|
else
|
|
{
|
|
return (sizeof (AML_RESOURCE_SMALL_HEADER));
|
|
}
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiUtGetDescriptorLength
|
|
*
|
|
* PARAMETERS: Aml - Pointer to the raw AML resource descriptor
|
|
*
|
|
* RETURN: Byte length
|
|
*
|
|
* DESCRIPTION: Get the total byte length of a raw AML descriptor, including the
|
|
* length of the descriptor header and the length field itself.
|
|
* Used to walk descriptor lists.
|
|
*
|
|
******************************************************************************/
|
|
|
|
UINT32
|
|
AcpiUtGetDescriptorLength (
|
|
void *Aml)
|
|
{
|
|
ACPI_FUNCTION_ENTRY ();
|
|
|
|
|
|
/*
|
|
* Get the Resource Length (does not include header length) and add
|
|
* the header length (depends on if this is a small or large resource)
|
|
*/
|
|
return (AcpiUtGetResourceLength (Aml) +
|
|
AcpiUtGetResourceHeaderLength (Aml));
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiUtGetResourceEndTag
|
|
*
|
|
* PARAMETERS: ObjDesc - The resource template buffer object
|
|
* EndTag - Where the pointer to the EndTag is returned
|
|
*
|
|
* RETURN: Status, pointer to the end tag
|
|
*
|
|
* DESCRIPTION: Find the EndTag resource descriptor in an AML resource template
|
|
* Note: allows a buffer length of zero.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiUtGetResourceEndTag (
|
|
ACPI_OPERAND_OBJECT *ObjDesc,
|
|
UINT8 **EndTag)
|
|
{
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (UtGetResourceEndTag);
|
|
|
|
|
|
/* Allow a buffer length of zero */
|
|
|
|
if (!ObjDesc->Buffer.Length)
|
|
{
|
|
*EndTag = ObjDesc->Buffer.Pointer;
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
/* Validate the template and get a pointer to the EndTag */
|
|
|
|
Status = AcpiUtWalkAmlResources (NULL, ObjDesc->Buffer.Pointer,
|
|
ObjDesc->Buffer.Length, NULL, (void **) EndTag);
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|