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Release 4.11 drivers/acpi/acpica/utpredef.c

/******************************************************************************
 *
 * Module Name: utpredef - support functions for predefined names
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2017, Intel Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 */

#include <acpi/acpi.h>
#include "accommon.h"
#include "acpredef.h"


#define _COMPONENT          ACPI_UTILITIES
ACPI_MODULE_NAME("utpredef")

/*
 * Names for the types that can be returned by the predefined objects.
 * Used for warning messages. Must be in the same order as the ACPI_RTYPEs
 */

static const char *ut_rtype_names[] = {
	"/Integer",
	"/String",
	"/Buffer",
	"/Package",
	"/Reference",
};

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_get_next_predefined_method
 *
 * PARAMETERS:  this_name           - Entry in the predefined method/name table
 *
 * RETURN:      Pointer to next entry in predefined table.
 *
 * DESCRIPTION: Get the next entry in the predefine method table. Handles the
 *              cases where a package info entry follows a method name that
 *              returns a package.
 *
 ******************************************************************************/


const union acpi_predefined_info *acpi_ut_get_next_predefined_method(const union acpi_predefined_info *this_name) { /* * Skip next entry in the table if this name returns a Package * (next entry contains the package info) */ if ((this_name->info.expected_btypes & ACPI_RTYPE_PACKAGE) && (this_name->info.expected_btypes != ACPI_RTYPE_ALL)) { this_name++; } this_name++; return (this_name); }

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/******************************************************************************* * * FUNCTION: acpi_ut_match_predefined_method * * PARAMETERS: name - Name to find * * RETURN: Pointer to entry in predefined table. NULL indicates not found. * * DESCRIPTION: Check an object name against the predefined object list. * ******************************************************************************/
const union acpi_predefined_info *acpi_ut_match_predefined_method(char *name) { const union acpi_predefined_info *this_name; /* Quick check for a predefined name, first character must be underscore */ if (name[0] != '_') { return (NULL); } /* Search info table for a predefined method/object name */ this_name = acpi_gbl_predefined_methods; while (this_name->info.name[0]) { if (ACPI_COMPARE_NAME(name, this_name->info.name)) { return (this_name); } this_name = acpi_ut_get_next_predefined_method(this_name); } return (NULL); /* Not found */ }

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/******************************************************************************* * * FUNCTION: acpi_ut_get_expected_return_types * * PARAMETERS: buffer - Where the formatted string is returned * expected_Btypes - Bitfield of expected data types * * RETURN: Formatted string in Buffer. * * DESCRIPTION: Format the expected object types into a printable string. * ******************************************************************************/
void acpi_ut_get_expected_return_types(char *buffer, u32 expected_btypes) { u32 this_rtype; u32 i; u32 j; if (!expected_btypes) { strcpy(buffer, "NONE"); return; } j = 1; buffer[0] = 0; this_rtype = ACPI_RTYPE_INTEGER; for (i = 0; i < ACPI_NUM_RTYPES; i++) { /* If one of the expected types, concatenate the name of this type */ if (expected_btypes & this_rtype) { strcat(buffer, &ut_rtype_names[i][j]); j = 0; /* Use name separator from now on */ } this_rtype <<= 1; /* Next Rtype */ } }

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/******************************************************************************* * * The remaining functions are used by iASL and acpi_help only * ******************************************************************************/ #if (defined ACPI_ASL_COMPILER || defined ACPI_HELP_APP) /* Local prototypes */ static u32 acpi_ut_get_argument_types(char *buffer, u16 argument_types); /* Types that can be returned externally by a predefined name */ static const char *ut_external_type_names[] = /* Indexed by ACPI_TYPE_* */ { ", UNSUPPORTED-TYPE", ", Integer", ", String", ", Buffer", ", Package" }; /* Bit widths for resource descriptor predefined names */ static const char *ut_resource_type_names[] = { "/1", "/2", "/3", "/8", "/16", "/32", "/64", "/variable", }; /******************************************************************************* * * FUNCTION: acpi_ut_match_resource_name * * PARAMETERS: name - Name to find * * RETURN: Pointer to entry in the resource table. NULL indicates not * found. * * DESCRIPTION: Check an object name against the predefined resource * descriptor object list. * ******************************************************************************/
const union acpi_predefined_info *acpi_ut_match_resource_name(char *name) { const union acpi_predefined_info *this_name; /* * Quick check for a predefined name, first character must * be underscore */ if (name[0] != '_') { return (NULL); } /* Search info table for a predefined method/object name */ this_name = acpi_gbl_resource_names; while (this_name->info.name[0]) { if (ACPI_COMPARE_NAME(name, this_name->info.name)) { return (this_name); } this_name++; } return (NULL); /* Not found */ }

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/******************************************************************************* * * FUNCTION: acpi_ut_display_predefined_method * * PARAMETERS: buffer - Scratch buffer for this function * this_name - Entry in the predefined method/name table * multi_line - TRUE if output should be on >1 line * * RETURN: None * * DESCRIPTION: Display information about a predefined method. Number and * type of the input arguments, and expected type(s) for the * return value, if any. * ******************************************************************************/
void acpi_ut_display_predefined_method(char *buffer, const union acpi_predefined_info *this_name, u8 multi_line) { u32 arg_count; /* * Get the argument count and the string buffer * containing all argument types */ arg_count = acpi_ut_get_argument_types(buffer, this_name->info.argument_list); if (multi_line) { printf(" "); } printf("%4.4s Requires %s%u argument%s", this_name->info.name, (this_name->info.argument_list & ARG_COUNT_IS_MINIMUM) ? "(at least) " : "", arg_count, arg_count != 1 ? "s" : ""); /* Display the types for any arguments */ if (arg_count > 0) { printf(" (%s)", buffer); } if (multi_line) { printf("\n "); } /* Get the return value type(s) allowed */ if (this_name->info.expected_btypes) { acpi_ut_get_expected_return_types(buffer, this_name->info. expected_btypes); printf(" Return value types: %s\n", buffer); } else { printf(" No return value\n"); } }

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/******************************************************************************* * * FUNCTION: acpi_ut_get_argument_types * * PARAMETERS: buffer - Where to return the formatted types * argument_types - Types field for this method * * RETURN: count - the number of arguments required for this method * * DESCRIPTION: Format the required data types for this method (Integer, * String, Buffer, or Package) and return the required argument * count. * ******************************************************************************/
static u32 acpi_ut_get_argument_types(char *buffer, u16 argument_types) { u16 this_argument_type; u16 sub_index; u16 arg_count; u32 i; *buffer = 0; sub_index = 2; /* First field in the types list is the count of args to follow */ arg_count = METHOD_GET_ARG_COUNT(argument_types); if (arg_count > METHOD_PREDEF_ARGS_MAX) { printf("**** Invalid argument count (%u) " "in predefined info structure\n", arg_count); return (arg_count); } /* Get each argument from the list, convert to ascii, store to buffer */ for (i = 0; i < arg_count; i++) { this_argument_type = METHOD_GET_NEXT_TYPE(argument_types); if (!this_argument_type || (this_argument_type > METHOD_MAX_ARG_TYPE)) { printf("**** Invalid argument type (%u) " "in predefined info structure\n", this_argument_type); return (arg_count); } strcat(buffer, ut_external_type_names[this_argument_type] + sub_index); sub_index = 0; } return (arg_count); }

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/******************************************************************************* * * FUNCTION: acpi_ut_get_resource_bit_width * * PARAMETERS: buffer - Where the formatted string is returned * types - Bitfield of expected data types * * RETURN: Count of return types. Formatted string in Buffer. * * DESCRIPTION: Format the resource bit widths into a printable string. * ******************************************************************************/
u32 acpi_ut_get_resource_bit_width(char *buffer, u16 types) { u32 i; u16 sub_index; u32 found; *buffer = 0; sub_index = 1; found = 0; for (i = 0; i < NUM_RESOURCE_WIDTHS; i++) { if (types & 1) { strcat(buffer, &(ut_resource_type_names[i][sub_index])); sub_index = 0; found++; } types >>= 1; } return (found); }

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#endif

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