831 lines
21 KiB
C
831 lines
21 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 - 2016, 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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#include <acpi/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 *acpi_gbl_bm_decode[] = {
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"NotBusMaster",
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"BusMaster"
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};
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const char *acpi_gbl_config_decode[] = {
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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 *acpi_gbl_consume_decode[] = {
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"ResourceProducer",
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"ResourceConsumer"
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};
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const char *acpi_gbl_dec_decode[] = {
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"PosDecode",
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"SubDecode"
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};
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const char *acpi_gbl_he_decode[] = {
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"Level",
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"Edge"
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};
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const char *acpi_gbl_io_decode[] = {
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"Decode10",
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"Decode16"
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};
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const char *acpi_gbl_ll_decode[] = {
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"ActiveHigh",
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"ActiveLow",
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"ActiveBoth",
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"Reserved"
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};
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const char *acpi_gbl_max_decode[] = {
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"MaxNotFixed",
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"MaxFixed"
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};
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const char *acpi_gbl_mem_decode[] = {
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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 *acpi_gbl_min_decode[] = {
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"MinNotFixed",
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"MinFixed"
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};
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const char *acpi_gbl_mtp_decode[] = {
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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 *acpi_gbl_rng_decode[] = {
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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 *acpi_gbl_rw_decode[] = {
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"ReadOnly",
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"ReadWrite"
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};
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const char *acpi_gbl_shr_decode[] = {
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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 *acpi_gbl_siz_decode[] = {
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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 *acpi_gbl_trs_decode[] = {
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"DenseTranslation",
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"SparseTranslation"
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};
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const char *acpi_gbl_ttp_decode[] = {
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"TypeStatic",
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"TypeTranslation"
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};
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const char *acpi_gbl_typ_decode[] = {
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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 *acpi_gbl_ppc_decode[] = {
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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 *acpi_gbl_ior_decode[] = {
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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 *acpi_gbl_dts_decode[] = {
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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 *acpi_gbl_ct_decode[] = {
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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 *acpi_gbl_sbt_decode[] = {
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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 *acpi_gbl_am_decode[] = {
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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 *acpi_gbl_sm_decode[] = {
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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 *acpi_gbl_wm_decode[] = {
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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 *acpi_gbl_cph_decode[] = {
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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 *acpi_gbl_cpo_decode[] = {
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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 *acpi_gbl_dp_decode[] = {
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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 *acpi_gbl_ed_decode[] = {
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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 *acpi_gbl_bpb_decode[] = {
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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 *acpi_gbl_sb_decode[] = {
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"StopBitsZero",
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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 *acpi_gbl_fc_decode[] = {
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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 *acpi_gbl_pt_decode[] = {
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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 u8 acpi_gbl_resource_aml_sizes[] = {
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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(struct aml_resource_irq),
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ACPI_AML_SIZE_SMALL(struct aml_resource_dma),
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ACPI_AML_SIZE_SMALL(struct aml_resource_start_dependent),
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ACPI_AML_SIZE_SMALL(struct aml_resource_end_dependent),
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ACPI_AML_SIZE_SMALL(struct aml_resource_io),
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ACPI_AML_SIZE_SMALL(struct aml_resource_fixed_io),
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ACPI_AML_SIZE_SMALL(struct 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(struct aml_resource_vendor_small),
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ACPI_AML_SIZE_SMALL(struct aml_resource_end_tag),
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/* Large descriptors */
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0,
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ACPI_AML_SIZE_LARGE(struct aml_resource_memory24),
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ACPI_AML_SIZE_LARGE(struct aml_resource_generic_register),
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0,
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ACPI_AML_SIZE_LARGE(struct aml_resource_vendor_large),
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ACPI_AML_SIZE_LARGE(struct aml_resource_memory32),
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ACPI_AML_SIZE_LARGE(struct aml_resource_fixed_memory32),
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ACPI_AML_SIZE_LARGE(struct aml_resource_address32),
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ACPI_AML_SIZE_LARGE(struct aml_resource_address16),
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ACPI_AML_SIZE_LARGE(struct aml_resource_extended_irq),
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ACPI_AML_SIZE_LARGE(struct aml_resource_address64),
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ACPI_AML_SIZE_LARGE(struct aml_resource_extended_address64),
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ACPI_AML_SIZE_LARGE(struct aml_resource_gpio),
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0,
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ACPI_AML_SIZE_LARGE(struct aml_resource_common_serialbus),
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};
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const u8 acpi_gbl_resource_aml_serial_bus_sizes[] = {
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0,
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ACPI_AML_SIZE_LARGE(struct aml_resource_i2c_serialbus),
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ACPI_AML_SIZE_LARGE(struct aml_resource_spi_serialbus),
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ACPI_AML_SIZE_LARGE(struct 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 u8 acpi_gbl_resource_types[] = {
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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 start_dependent_functions */
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ACPI_FIXED_LENGTH, /* 07 end_dependent_functions */
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ACPI_FIXED_LENGTH, /* 08 IO */
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ACPI_FIXED_LENGTH, /* 09 fixed_IO */
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ACPI_FIXED_LENGTH, /* 0A fixed_DMA */
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0,
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0,
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0,
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ACPI_VARIABLE_LENGTH, /* 0E vendor_short */
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ACPI_FIXED_LENGTH, /* 0F end_tag */
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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 generic_register */
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0,
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ACPI_VARIABLE_LENGTH, /* 04 vendor_long */
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ACPI_FIXED_LENGTH, /* 05 Memory32 */
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ACPI_FIXED_LENGTH, /* 06 memory32_fixed */
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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 extended_IRQ */
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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 *serial_bus */
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};
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_walk_aml_resources
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*
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* PARAMETERS: walk_state - Current walk info
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* PARAMETERS: aml - Pointer to the raw AML resource template
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* aml_length - Length of the entire template
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* user_function - Called once for each descriptor found. If
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* NULL, a pointer to the end_tag is returned
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* context - Passed to user_function
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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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acpi_ut_walk_aml_resources(struct acpi_walk_state *walk_state,
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u8 *aml,
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acpi_size aml_length,
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acpi_walk_aml_callback user_function, void **context)
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{
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acpi_status status;
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u8 *end_aml;
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u8 resource_index;
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u32 length;
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u32 offset = 0;
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u8 end_tag[2] = { 0x79, 0x00 };
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ACPI_FUNCTION_TRACE(ut_walk_aml_resources);
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/* The absolute minimum resource template is one end_tag descriptor */
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if (aml_length < sizeof(struct aml_resource_end_tag)) {
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return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
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}
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/* Point to the end of the resource template buffer */
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end_aml = aml + aml_length;
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/* Walk the byte list, abort on any invalid descriptor type or length */
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while (aml < end_aml) {
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/* Validate the Resource Type and Resource Length */
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status =
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acpi_ut_validate_resource(walk_state, aml, &resource_index);
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if (ACPI_FAILURE(status)) {
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/*
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* Exit on failure. Cannot continue because the descriptor
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* length 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 = acpi_ut_get_descriptor_length(aml);
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|
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/* Invoke the user function */
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if (user_function) {
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status =
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user_function(aml, length, offset, resource_index,
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context);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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}
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|
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/* An end_tag descriptor terminates this resource template */
|
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|
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if (acpi_ut_get_resource_type(aml) ==
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ACPI_RESOURCE_NAME_END_TAG) {
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/*
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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 end_tag
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*/
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if ((aml + 1) >= end_aml) {
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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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/* Return the pointer to the end_tag if requested */
|
|
|
|
if (!user_function) {
|
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*context = aml;
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}
|
|
|
|
/* Normal exit */
|
|
|
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return_ACPI_STATUS(AE_OK);
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}
|
|
|
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aml += length;
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offset += length;
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}
|
|
|
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/* Did not find an end_tag descriptor */
|
|
|
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if (user_function) {
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|
|
|
/* Insert an end_tag anyway. acpi_rs_get_list_length always leaves room */
|
|
|
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(void)acpi_ut_validate_resource(walk_state, end_tag,
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&resource_index);
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status =
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user_function(end_tag, 2, offset, resource_index, context);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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|
}
|
|
}
|
|
|
|
return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
|
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}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_validate_resource
|
|
*
|
|
* PARAMETERS: walk_state - Current walk info
|
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* aml - Pointer to the raw AML resource descriptor
|
|
* return_index - Where the resource index is returned. NULL
|
|
* if the index is not required.
|
|
*
|
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* 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.
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|
*
|
|
******************************************************************************/
|
|
|
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acpi_status
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acpi_ut_validate_resource(struct acpi_walk_state *walk_state,
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void *aml, u8 *return_index)
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|
{
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union aml_resource *aml_resource;
|
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u8 resource_type;
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u8 resource_index;
|
|
acpi_rs_length resource_length;
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|
acpi_rs_length minimum_resource_length;
|
|
|
|
ACPI_FUNCTION_ENTRY();
|
|
|
|
/*
|
|
* 1) Validate the resource_type field (Byte 0)
|
|
*/
|
|
resource_type = ACPI_GET8(aml);
|
|
|
|
/*
|
|
* Byte 0 contains the descriptor name (Resource Type)
|
|
* Examine the large/small bit in the resource header
|
|
*/
|
|
if (resource_type & ACPI_RESOURCE_NAME_LARGE) {
|
|
|
|
/* Verify the large resource type (name) against the max */
|
|
|
|
if (resource_type > ACPI_RESOURCE_NAME_LARGE_MAX) {
|
|
goto invalid_resource;
|
|
}
|
|
|
|
/*
|
|
* Large Resource Type -- bits 6:0 contain the name
|
|
* Translate range 0x80-0x8B to index range 0x10-0x1B
|
|
*/
|
|
resource_index = (u8) (resource_type - 0x70);
|
|
} else {
|
|
/*
|
|
* Small Resource Type -- bits 6:3 contain the name
|
|
* Shift range to index range 0x00-0x0F
|
|
*/
|
|
resource_index = (u8)
|
|
((resource_type & ACPI_RESOURCE_NAME_SMALL_MASK) >> 3);
|
|
}
|
|
|
|
/*
|
|
* Check validity of the resource type, via acpi_gbl_resource_types.
|
|
* Zero indicates an invalid resource.
|
|
*/
|
|
if (!acpi_gbl_resource_types[resource_index]) {
|
|
goto invalid_resource;
|
|
}
|
|
|
|
/*
|
|
* Validate the resource_length field. This ensures that the length
|
|
* is at least reasonable, and guarantees that it is non-zero.
|
|
*/
|
|
resource_length = acpi_ut_get_resource_length(aml);
|
|
minimum_resource_length = acpi_gbl_resource_aml_sizes[resource_index];
|
|
|
|
/* Validate based upon the type of resource - fixed length or variable */
|
|
|
|
switch (acpi_gbl_resource_types[resource_index]) {
|
|
case ACPI_FIXED_LENGTH:
|
|
|
|
/* Fixed length resource, length must match exactly */
|
|
|
|
if (resource_length != minimum_resource_length) {
|
|
goto bad_resource_length;
|
|
}
|
|
break;
|
|
|
|
case ACPI_VARIABLE_LENGTH:
|
|
|
|
/* Variable length resource, length must be at least the minimum */
|
|
|
|
if (resource_length < minimum_resource_length) {
|
|
goto bad_resource_length;
|
|
}
|
|
break;
|
|
|
|
case ACPI_SMALL_VARIABLE_LENGTH:
|
|
|
|
/* Small variable length resource, length can be (Min) or (Min-1) */
|
|
|
|
if ((resource_length > minimum_resource_length) ||
|
|
(resource_length < (minimum_resource_length - 1))) {
|
|
goto bad_resource_length;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
|
|
/* Shouldn't happen (because of validation earlier), but be sure */
|
|
|
|
goto invalid_resource;
|
|
}
|
|
|
|
aml_resource = ACPI_CAST_PTR(union aml_resource, aml);
|
|
if (resource_type == ACPI_RESOURCE_NAME_SERIAL_BUS) {
|
|
|
|
/* Validate the bus_type field */
|
|
|
|
if ((aml_resource->common_serial_bus.type == 0) ||
|
|
(aml_resource->common_serial_bus.type >
|
|
AML_RESOURCE_MAX_SERIALBUSTYPE)) {
|
|
if (walk_state) {
|
|
ACPI_ERROR((AE_INFO,
|
|
"Invalid/unsupported SerialBus resource descriptor: BusType 0x%2.2X",
|
|
aml_resource->common_serial_bus.
|
|
type));
|
|
}
|
|
return (AE_AML_INVALID_RESOURCE_TYPE);
|
|
}
|
|
}
|
|
|
|
/* Optionally return the resource table index */
|
|
|
|
if (return_index) {
|
|
*return_index = resource_index;
|
|
}
|
|
|
|
return (AE_OK);
|
|
|
|
invalid_resource:
|
|
|
|
if (walk_state) {
|
|
ACPI_ERROR((AE_INFO,
|
|
"Invalid/unsupported resource descriptor: Type 0x%2.2X",
|
|
resource_type));
|
|
}
|
|
return (AE_AML_INVALID_RESOURCE_TYPE);
|
|
|
|
bad_resource_length:
|
|
|
|
if (walk_state) {
|
|
ACPI_ERROR((AE_INFO,
|
|
"Invalid resource descriptor length: Type "
|
|
"0x%2.2X, Length 0x%4.4X, MinLength 0x%4.4X",
|
|
resource_type, resource_length,
|
|
minimum_resource_length));
|
|
}
|
|
return (AE_AML_BAD_RESOURCE_LENGTH);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_get_resource_type
|
|
*
|
|
* 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.
|
|
*
|
|
******************************************************************************/
|
|
|
|
u8 acpi_ut_get_resource_type(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 ((u8) (ACPI_GET8(aml) & ACPI_RESOURCE_NAME_SMALL_MASK));
|
|
}
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_get_resource_length
|
|
*
|
|
* 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.
|
|
*
|
|
******************************************************************************/
|
|
|
|
u16 acpi_ut_get_resource_length(void *aml)
|
|
{
|
|
acpi_rs_length resource_length;
|
|
|
|
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(&resource_length, ACPI_ADD_PTR(u8, aml, 1));
|
|
|
|
} else {
|
|
/* Small Resource type -- bits 2:0 of byte 0 contain the length */
|
|
|
|
resource_length = (u16) (ACPI_GET8(aml) &
|
|
ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK);
|
|
}
|
|
|
|
return (resource_length);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_get_resource_header_length
|
|
*
|
|
* 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.
|
|
*
|
|
******************************************************************************/
|
|
|
|
u8 acpi_ut_get_resource_header_length(void *aml)
|
|
{
|
|
ACPI_FUNCTION_ENTRY();
|
|
|
|
/* Examine the large/small bit in the resource header */
|
|
|
|
if (ACPI_GET8(aml) & ACPI_RESOURCE_NAME_LARGE) {
|
|
return (sizeof(struct aml_resource_large_header));
|
|
} else {
|
|
return (sizeof(struct aml_resource_small_header));
|
|
}
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_get_descriptor_length
|
|
*
|
|
* 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.
|
|
*
|
|
******************************************************************************/
|
|
|
|
u32 acpi_ut_get_descriptor_length(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 (acpi_ut_get_resource_length(aml) +
|
|
acpi_ut_get_resource_header_length(aml));
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_get_resource_end_tag
|
|
*
|
|
* PARAMETERS: obj_desc - The resource template buffer object
|
|
* end_tag - Where the pointer to the end_tag is returned
|
|
*
|
|
* RETURN: Status, pointer to the end tag
|
|
*
|
|
* DESCRIPTION: Find the end_tag resource descriptor in an AML resource template
|
|
* Note: allows a buffer length of zero.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ut_get_resource_end_tag(union acpi_operand_object *obj_desc, u8 **end_tag)
|
|
{
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(ut_get_resource_end_tag);
|
|
|
|
/* Allow a buffer length of zero */
|
|
|
|
if (!obj_desc->buffer.length) {
|
|
*end_tag = obj_desc->buffer.pointer;
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
/* Validate the template and get a pointer to the end_tag */
|
|
|
|
status = acpi_ut_walk_aml_resources(NULL, obj_desc->buffer.pointer,
|
|
obj_desc->buffer.length, NULL,
|
|
(void **)end_tag);
|
|
|
|
return_ACPI_STATUS(status);
|
|
}
|