utresrc.c

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/*******************************************************************************
 *
 * Module Name: utresrc - Resource managment utilities
 *
 ******************************************************************************/

/*
 * Copyright (C) 2000 - 2007, R. Byron Moore
 * 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.
 */

#include <acpi/acpi.h>
#include <acpi/amlresrc.h>

#define _COMPONENT          ACPI_UTILITIES
ACPI_MODULE_NAME("utresrc")
#if defined(ACPI_DISASSEMBLER) || defined (ACPI_DEBUGGER)
/*
 * Strings used to decode resource descriptors.
 * Used by both the disasssembler and the debugger resource dump routines
 */
const char *acpi_gbl_bm_decode[] = {
	"NotBusMaster",
	"BusMaster"
};

const char *acpi_gbl_config_decode[] = {
	"0 - Good Configuration",
	"1 - Acceptable Configuration",
	"2 - Suboptimal Configuration",
	"3 - ***Invalid Configuration***",
};

const char *acpi_gbl_consume_decode[] = {
	"ResourceProducer",
	"ResourceConsumer"
};

const char *acpi_gbl_dec_decode[] = {
	"PosDecode",
	"SubDecode"
};

const char *acpi_gbl_he_decode[] = {
	"Level",
	"Edge"
};

const char *acpi_gbl_io_decode[] = {
	"Decode10",
	"Decode16"
};

const char *acpi_gbl_ll_decode[] = {
	"ActiveHigh",
	"ActiveLow"
};

const char *acpi_gbl_max_decode[] = {
	"MaxNotFixed",
	"MaxFixed"
};

const char *acpi_gbl_mem_decode[] = {
	"NonCacheable",
	"Cacheable",
	"WriteCombining",
	"Prefetchable"
};

const char *acpi_gbl_min_decode[] = {
	"MinNotFixed",
	"MinFixed"
};

const char *acpi_gbl_mtp_decode[] = {
	"AddressRangeMemory",
	"AddressRangeReserved",
	"AddressRangeACPI",
	"AddressRangeNVS"
};

const char *acpi_gbl_rng_decode[] = {
	"InvalidRanges",
	"NonISAOnlyRanges",
	"ISAOnlyRanges",
	"EntireRange"
};

const char *acpi_gbl_rw_decode[] = {
	"ReadOnly",
	"ReadWrite"
};

const char *acpi_gbl_shr_decode[] = {
	"Exclusive",
	"Shared"
};

const char *acpi_gbl_siz_decode[] = {
	"Transfer8",
	"Transfer8_16",
	"Transfer16",
	"InvalidSize"
};

const char *acpi_gbl_trs_decode[] = {
	"DenseTranslation",
	"SparseTranslation"
};

const char *acpi_gbl_ttp_decode[] = {
	"TypeStatic",
	"TypeTranslation"
};

const char *acpi_gbl_typ_decode[] = {
	"Compatibility",
	"TypeA",
	"TypeB",
	"TypeF"
};

#endif

/*
 * Base sizes of the raw AML resource descriptors, indexed by resource type.
 * Zero indicates a reserved (and therefore invalid) resource type.
 */
const u8 acpi_gbl_resource_aml_sizes[] = {
	/* Small descriptors */

	0,
	0,
	0,
	0,
	ACPI_AML_SIZE_SMALL(struct aml_resource_irq),
	ACPI_AML_SIZE_SMALL(struct aml_resource_dma),
	ACPI_AML_SIZE_SMALL(struct aml_resource_start_dependent),
	ACPI_AML_SIZE_SMALL(struct aml_resource_end_dependent),
	ACPI_AML_SIZE_SMALL(struct aml_resource_io),
	ACPI_AML_SIZE_SMALL(struct aml_resource_fixed_io),
	0,
	0,
	0,
	0,
	ACPI_AML_SIZE_SMALL(struct aml_resource_vendor_small),
	ACPI_AML_SIZE_SMALL(struct aml_resource_end_tag),

	/* Large descriptors */

	0,
	ACPI_AML_SIZE_LARGE(struct aml_resource_memory24),
	ACPI_AML_SIZE_LARGE(struct aml_resource_generic_register),
	0,
	ACPI_AML_SIZE_LARGE(struct aml_resource_vendor_large),
	ACPI_AML_SIZE_LARGE(struct aml_resource_memory32),
	ACPI_AML_SIZE_LARGE(struct aml_resource_fixed_memory32),
	ACPI_AML_SIZE_LARGE(struct aml_resource_address32),
	ACPI_AML_SIZE_LARGE(struct aml_resource_address16),
	ACPI_AML_SIZE_LARGE(struct aml_resource_extended_irq),
	ACPI_AML_SIZE_LARGE(struct aml_resource_address64),
	ACPI_AML_SIZE_LARGE(struct aml_resource_extended_address64)
};

/*
 * Resource types, used to validate the resource length field.
 * The length of fixed-length types must match exactly, variable
 * lengths must meet the minimum required length, etc.
 * Zero indicates a reserved (and therefore invalid) resource type.
 */
static const u8 acpi_gbl_resource_types[] = {
	/* Small descriptors */

	0,
	0,
	0,
	0,
	ACPI_SMALL_VARIABLE_LENGTH,
	ACPI_FIXED_LENGTH,
	ACPI_SMALL_VARIABLE_LENGTH,
	ACPI_FIXED_LENGTH,
	ACPI_FIXED_LENGTH,
	ACPI_FIXED_LENGTH,
	0,
	0,
	0,
	0,
	ACPI_VARIABLE_LENGTH,
	ACPI_FIXED_LENGTH,

	/* Large descriptors */

	0,
	ACPI_FIXED_LENGTH,
	ACPI_FIXED_LENGTH,
	0,
	ACPI_VARIABLE_LENGTH,
	ACPI_FIXED_LENGTH,
	ACPI_FIXED_LENGTH,
	ACPI_VARIABLE_LENGTH,
	ACPI_VARIABLE_LENGTH,
	ACPI_VARIABLE_LENGTH,
	ACPI_VARIABLE_LENGTH,
	ACPI_FIXED_LENGTH
};

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_walk_aml_resources
 *
 * PARAMETERS:  Aml             - Pointer to the raw AML resource template
 *              aml_length      - Length of the entire template
 *              user_function   - Called once for each descriptor found. If
 *                                NULL, a pointer to the end_tag is returned
 *              Context         - Passed to user_function
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Walk a raw AML resource list(buffer). User function called
 *              once for each resource found.
 *
 ******************************************************************************/

acpi_status
acpi_ut_walk_aml_resources(u8 * aml,
			   acpi_size aml_length,
			   acpi_walk_aml_callback user_function, void **context)
{
	acpi_status status;
	u8 *end_aml;
	u8 resource_index;
	u32 length;
	u32 offset = 0;

	ACPI_FUNCTION_TRACE(ut_walk_aml_resources);

	/* The absolute minimum resource template is one end_tag descriptor */

	if (aml_length < sizeof(struct aml_resource_end_tag)) {
		return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
	}

	/* Point to the end of the resource template buffer */

	end_aml = aml + aml_length;

	/* Walk the byte list, abort on any invalid descriptor type or length */

	while (aml < end_aml) {

		/* Validate the Resource Type and Resource Length */

		status = acpi_ut_validate_resource(aml, &resource_index);
		if (ACPI_FAILURE(status)) {
			return_ACPI_STATUS(status);
		}

		/* Get the length of this descriptor */

		length = acpi_ut_get_descriptor_length(aml);

		/* Invoke the user function */

		if (user_function) {
			status =
			    user_function(aml, length, offset, resource_index,
					  context);
			if (ACPI_FAILURE(status)) {
				return (status);
			}
		}

		/* An end_tag descriptor terminates this resource template */

		if (acpi_ut_get_resource_type(aml) ==