// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
*
* Module Name: utpredef - support functions for predefined names
*
* Copyright (C) 2000 - 2023, Intel Corp.
*
*****************************************************************************/
#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);
}
/*******************************************************************************
*
* 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_NAMESEG(name, this_name->info.name)) {
return (this_name);
}
this_name = acpi_ut_get_next_predefined_method(this_name);
}
return (NULL); /* Not found */
}
/*******************************************************************************
*
* 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 */
}
}
/*******************************************************************************
*
* 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_* */
{
", Type_ANY",
", 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_NAMESEG(name, this_name->info.name)) {
return (this_name);
}
this_name++;
}
return (NULL); /* Not found */
}
/*******************************************************************************
*
* 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");
}
}
/*******************************************************************************
*
* 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 > 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);
}
/*******************************************************************************
*
* 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);
}
#endif
