365 lines
9.4 KiB
C
365 lines
9.4 KiB
C
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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/******************************************************************************
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*
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* Module Name: utpredef - support functions for predefined names
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*
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* Copyright (C) 2000 - 2022, Intel Corp.
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*
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*****************************************************************************/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "acpredef.h"
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#define _COMPONENT ACPI_UTILITIES
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ACPI_MODULE_NAME("utpredef")
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/*
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* Names for the types that can be returned by the predefined objects.
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* Used for warning messages. Must be in the same order as the ACPI_RTYPEs
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*/
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static const char *ut_rtype_names[] = {
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"/Integer",
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"/String",
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"/Buffer",
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"/Package",
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"/Reference",
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};
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_get_next_predefined_method
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*
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* PARAMETERS: this_name - Entry in the predefined method/name table
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*
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* RETURN: Pointer to next entry in predefined table.
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*
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* DESCRIPTION: Get the next entry in the predefine method table. Handles the
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* cases where a package info entry follows a method name that
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* returns a package.
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*
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******************************************************************************/
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const union acpi_predefined_info *acpi_ut_get_next_predefined_method(const union
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acpi_predefined_info
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*this_name)
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{
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/*
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* Skip next entry in the table if this name returns a Package
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* (next entry contains the package info)
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*/
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if ((this_name->info.expected_btypes & ACPI_RTYPE_PACKAGE) &&
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(this_name->info.expected_btypes != ACPI_RTYPE_ALL)) {
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this_name++;
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}
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this_name++;
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return (this_name);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_match_predefined_method
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*
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* PARAMETERS: name - Name to find
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*
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* RETURN: Pointer to entry in predefined table. NULL indicates not found.
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*
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* DESCRIPTION: Check an object name against the predefined object list.
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*
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******************************************************************************/
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const union acpi_predefined_info *acpi_ut_match_predefined_method(char *name)
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{
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const union acpi_predefined_info *this_name;
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/* Quick check for a predefined name, first character must be underscore */
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if (name[0] != '_') {
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return (NULL);
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}
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/* Search info table for a predefined method/object name */
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this_name = acpi_gbl_predefined_methods;
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while (this_name->info.name[0]) {
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if (ACPI_COMPARE_NAMESEG(name, this_name->info.name)) {
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return (this_name);
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}
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this_name = acpi_ut_get_next_predefined_method(this_name);
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}
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return (NULL); /* Not found */
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_get_expected_return_types
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*
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* PARAMETERS: buffer - Where the formatted string is returned
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* expected_Btypes - Bitfield of expected data types
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*
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* RETURN: Formatted string in Buffer.
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*
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* DESCRIPTION: Format the expected object types into a printable string.
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*
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******************************************************************************/
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void acpi_ut_get_expected_return_types(char *buffer, u32 expected_btypes)
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{
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u32 this_rtype;
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u32 i;
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u32 j;
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if (!expected_btypes) {
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strcpy(buffer, "NONE");
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return;
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}
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j = 1;
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buffer[0] = 0;
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this_rtype = ACPI_RTYPE_INTEGER;
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for (i = 0; i < ACPI_NUM_RTYPES; i++) {
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/* If one of the expected types, concatenate the name of this type */
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if (expected_btypes & this_rtype) {
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strcat(buffer, &ut_rtype_names[i][j]);
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j = 0; /* Use name separator from now on */
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}
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this_rtype <<= 1; /* Next Rtype */
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}
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}
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/*******************************************************************************
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*
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* The remaining functions are used by iASL and acpi_help only
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*
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******************************************************************************/
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#if (defined ACPI_ASL_COMPILER || defined ACPI_HELP_APP)
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/* Local prototypes */
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static u32 acpi_ut_get_argument_types(char *buffer, u16 argument_types);
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/* Types that can be returned externally by a predefined name */
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static const char *ut_external_type_names[] = /* Indexed by ACPI_TYPE_* */
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{
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", Type_ANY",
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", Integer",
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", String",
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", Buffer",
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", Package"
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};
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/* Bit widths for resource descriptor predefined names */
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static const char *ut_resource_type_names[] = {
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"/1",
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"/2",
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"/3",
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"/8",
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"/16",
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"/32",
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"/64",
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"/variable",
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};
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_match_resource_name
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*
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* PARAMETERS: name - Name to find
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*
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* RETURN: Pointer to entry in the resource table. NULL indicates not
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* found.
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*
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* DESCRIPTION: Check an object name against the predefined resource
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* descriptor object list.
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*
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******************************************************************************/
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const union acpi_predefined_info *acpi_ut_match_resource_name(char *name)
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{
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const union acpi_predefined_info *this_name;
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/*
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* Quick check for a predefined name, first character must
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* be underscore
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*/
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if (name[0] != '_') {
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return (NULL);
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}
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/* Search info table for a predefined method/object name */
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this_name = acpi_gbl_resource_names;
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while (this_name->info.name[0]) {
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if (ACPI_COMPARE_NAMESEG(name, this_name->info.name)) {
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return (this_name);
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}
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this_name++;
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}
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return (NULL); /* Not found */
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_display_predefined_method
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*
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* PARAMETERS: buffer - Scratch buffer for this function
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* this_name - Entry in the predefined method/name table
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* multi_line - TRUE if output should be on >1 line
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*
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* RETURN: None
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*
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* DESCRIPTION: Display information about a predefined method. Number and
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* type of the input arguments, and expected type(s) for the
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* return value, if any.
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*
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******************************************************************************/
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void
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acpi_ut_display_predefined_method(char *buffer,
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const union acpi_predefined_info *this_name,
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u8 multi_line)
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{
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u32 arg_count;
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/*
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* Get the argument count and the string buffer
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* containing all argument types
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*/
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arg_count = acpi_ut_get_argument_types(buffer,
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this_name->info.argument_list);
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if (multi_line) {
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printf(" ");
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}
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printf("%4.4s Requires %s%u argument%s",
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this_name->info.name,
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(this_name->info.argument_list & ARG_COUNT_IS_MINIMUM) ?
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"(at least) " : "", arg_count, arg_count != 1 ? "s" : "");
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/* Display the types for any arguments */
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if (arg_count > 0) {
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printf(" (%s)", buffer);
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}
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if (multi_line) {
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printf("\n ");
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}
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/* Get the return value type(s) allowed */
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if (this_name->info.expected_btypes) {
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acpi_ut_get_expected_return_types(buffer,
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this_name->info.
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expected_btypes);
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printf(" Return value types: %s\n", buffer);
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} else {
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printf(" No return value\n");
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_get_argument_types
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*
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* PARAMETERS: buffer - Where to return the formatted types
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* argument_types - Types field for this method
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*
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* RETURN: count - the number of arguments required for this method
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*
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* DESCRIPTION: Format the required data types for this method (Integer,
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* String, Buffer, or Package) and return the required argument
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* count.
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*
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******************************************************************************/
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static u32 acpi_ut_get_argument_types(char *buffer, u16 argument_types)
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{
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u16 this_argument_type;
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u16 sub_index;
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u16 arg_count;
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u32 i;
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*buffer = 0;
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sub_index = 2;
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/* First field in the types list is the count of args to follow */
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arg_count = METHOD_GET_ARG_COUNT(argument_types);
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if (arg_count > METHOD_PREDEF_ARGS_MAX) {
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printf("**** Invalid argument count (%u) "
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"in predefined info structure\n", arg_count);
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return (arg_count);
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}
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/* Get each argument from the list, convert to ascii, store to buffer */
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for (i = 0; i < arg_count; i++) {
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this_argument_type = METHOD_GET_NEXT_TYPE(argument_types);
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if (this_argument_type > METHOD_MAX_ARG_TYPE) {
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printf("**** Invalid argument type (%u) "
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"in predefined info structure\n",
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this_argument_type);
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return (arg_count);
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}
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strcat(buffer,
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ut_external_type_names[this_argument_type] + sub_index);
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sub_index = 0;
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}
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return (arg_count);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_get_resource_bit_width
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*
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* PARAMETERS: buffer - Where the formatted string is returned
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* types - Bitfield of expected data types
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*
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* RETURN: Count of return types. Formatted string in Buffer.
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*
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* DESCRIPTION: Format the resource bit widths into a printable string.
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*
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******************************************************************************/
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u32 acpi_ut_get_resource_bit_width(char *buffer, u16 types)
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{
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u32 i;
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u16 sub_index;
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u32 found;
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*buffer = 0;
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sub_index = 1;
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found = 0;
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for (i = 0; i < NUM_RESOURCE_WIDTHS; i++) {
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if (types & 1) {
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strcat(buffer, &(ut_resource_type_names[i][sub_index]));
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sub_index = 0;
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found++;
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}
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types >>= 1;
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}
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return (found);
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}
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#endif
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