// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
 *
 * Module Name: utdecode - Utility decoding routines (value-to-string)
 *
 * Copyright (C) 2000 - 2025, Intel Corp.
 *
 *****************************************************************************/

#include <acpi/acpi.h>
#include "accommon.h"
#include "acnamesp.h"
#include "amlcode.h"

#define _COMPONENT          ACPI_UTILITIES
ACPI_MODULE_NAME("utdecode")

/*
 * Properties of the ACPI Object Types, both internal and external.
 * The table is indexed by values of acpi_object_type
 */
const u8 acpi_gbl_ns_properties[ACPI_NUM_NS_TYPES] = {
        ACPI_NS_NORMAL,         /* 00 Any              */
        ACPI_NS_NORMAL,         /* 01 Number           */
        ACPI_NS_NORMAL,         /* 02 String           */
        ACPI_NS_NORMAL,         /* 03 Buffer           */
        ACPI_NS_NORMAL,         /* 04 Package          */
        ACPI_NS_NORMAL,         /* 05 field_unit       */
        ACPI_NS_NEWSCOPE,       /* 06 Device           */
        ACPI_NS_NORMAL,         /* 07 Event            */
        ACPI_NS_NEWSCOPE,       /* 08 Method           */
        ACPI_NS_NORMAL,         /* 09 Mutex            */
        ACPI_NS_NORMAL,         /* 10 Region           */
        ACPI_NS_NEWSCOPE,       /* 11 Power            */
        ACPI_NS_NEWSCOPE,       /* 12 Processor        */
        ACPI_NS_NEWSCOPE,       /* 13 Thermal          */
        ACPI_NS_NORMAL,         /* 14 buffer_field     */
        ACPI_NS_NORMAL,         /* 15 ddb_handle       */
        ACPI_NS_NORMAL,         /* 16 Debug Object     */
        ACPI_NS_NORMAL,         /* 17 def_field        */
        ACPI_NS_NORMAL,         /* 18 bank_field       */
        ACPI_NS_NORMAL,         /* 19 index_field      */
        ACPI_NS_NORMAL,         /* 20 Reference        */
        ACPI_NS_NORMAL,         /* 21 Alias            */
        ACPI_NS_NORMAL,         /* 22 method_alias     */
        ACPI_NS_NORMAL,         /* 23 Notify           */
        ACPI_NS_NORMAL,         /* 24 Address Handler  */
        ACPI_NS_NEWSCOPE | ACPI_NS_LOCAL,       /* 25 Resource Desc    */
        ACPI_NS_NEWSCOPE | ACPI_NS_LOCAL,       /* 26 Resource Field   */
        ACPI_NS_NEWSCOPE,       /* 27 Scope            */
        ACPI_NS_NORMAL,         /* 28 Extra            */
        ACPI_NS_NORMAL,         /* 29 Data             */
        ACPI_NS_NORMAL          /* 30 Invalid          */
};

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_get_region_name
 *
 * PARAMETERS:  Space ID            - ID for the region
 *
 * RETURN:      Decoded region space_id name
 *
 * DESCRIPTION: Translate a Space ID into a name string (Debug only)
 *
 ******************************************************************************/

/* Region type decoding */

const char *acpi_gbl_region_types[ACPI_NUM_PREDEFINED_REGIONS] = {
        "SystemMemory",         /* 0x00 */
        "SystemIO",             /* 0x01 */
        "PCI_Config",           /* 0x02 */
        "EmbeddedControl",      /* 0x03 */
        "SMBus",                /* 0x04 */
        "SystemCMOS",           /* 0x05 */
        "PCIBARTarget",         /* 0x06 */
        "IPMI",                 /* 0x07 */
        "GeneralPurposeIo",     /* 0x08 */
        "GenericSerialBus",     /* 0x09 */
        "PCC",                  /* 0x0A */
        "PlatformRtMechanism"   /* 0x0B */
};

const char *acpi_ut_get_region_name(u8 space_id)
{

        if (space_id >= ACPI_USER_REGION_BEGIN) {
                return ("UserDefinedRegion");
        } else if (space_id == ACPI_ADR_SPACE_DATA_TABLE) {
                return ("DataTable");
        } else if (space_id == ACPI_ADR_SPACE_FIXED_HARDWARE) {
                return ("FunctionalFixedHW");
        } else if (space_id >= ACPI_NUM_PREDEFINED_REGIONS) {
                return ("InvalidSpaceId");
        }

        return (acpi_gbl_region_types[space_id]);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_get_event_name
 *
 * PARAMETERS:  event_id            - Fixed event ID
 *
 * RETURN:      Decoded event ID name
 *
 * DESCRIPTION: Translate a Event ID into a name string (Debug only)
 *
 ******************************************************************************/

/* Event type decoding */

static const char *acpi_gbl_event_types[ACPI_NUM_FIXED_EVENTS] = {
        "PM_Timer",
        "GlobalLock",
        "PowerButton",
        "SleepButton",
        "RealTimeClock",
};

const char *acpi_ut_get_event_name(u32 event_id)
{

        if (event_id > ACPI_EVENT_MAX) {
                return ("InvalidEventID");
        }

        return (acpi_gbl_event_types[event_id]);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_get_type_name
 *
 * PARAMETERS:  type                - An ACPI object type
 *
 * RETURN:      Decoded ACPI object type name
 *
 * DESCRIPTION: Translate a Type ID into a name string (Debug only)
 *
 ******************************************************************************/

/*
 * Elements of acpi_gbl_ns_type_names below must match
 * one-to-one with values of acpi_object_type
 *
 * The type ACPI_TYPE_ANY (Untyped) is used as a "don't care" when searching;
 * when stored in a table it really means that we have thus far seen no
 * evidence to indicate what type is actually going to be stored for this
 & entry.
 */
static const char acpi_gbl_bad_type[] = "UNDEFINED";

/* Printable names of the ACPI object types */

static const char *acpi_gbl_ns_type_names[] = {
        /* 00 */ "Untyped",
        /* 01 */ "Integer",
        /* 02 */ "String",
        /* 03 */ "Buffer",
        /* 04 */ "Package",
        /* 05 */ "FieldUnit",
        /* 06 */ "Device",
        /* 07 */ "Event",
        /* 08 */ "Method",
        /* 09 */ "Mutex",
        /* 10 */ "Region",
        /* 11 */ "Power",
        /* 12 */ "Processor",
        /* 13 */ "Thermal",
        /* 14 */ "BufferField",
        /* 15 */ "DdbHandle",
        /* 16 */ "DebugObject",
        /* 17 */ "RegionField",
        /* 18 */ "BankField",
        /* 19 */ "IndexField",
        /* 20 */ "Reference",
        /* 21 */ "Alias",
        /* 22 */ "MethodAlias",
        /* 23 */ "Notify",
        /* 24 */ "AddrHandler",
        /* 25 */ "ResourceDesc",
        /* 26 */ "ResourceFld",
        /* 27 */ "Scope",
        /* 28 */ "Extra",
        /* 29 */ "Data",
        /* 30 */ "Invalid"
};

const char *acpi_ut_get_type_name(acpi_object_type type)
{

        if (type > ACPI_TYPE_INVALID) {
                return (acpi_gbl_bad_type);
        }

        return (acpi_gbl_ns_type_names[type]);
}

const char *acpi_ut_get_object_type_name(union acpi_operand_object *obj_desc)
{
        ACPI_FUNCTION_TRACE(ut_get_object_type_name);

        if (!obj_desc) {
                ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Null Object Descriptor\n"));
                return_STR("[NULL Object Descriptor]");
        }

        /* These descriptor types share a common area */

        if ((ACPI_GET_DESCRIPTOR_TYPE(obj_desc) != ACPI_DESC_TYPE_OPERAND) &&
            (ACPI_GET_DESCRIPTOR_TYPE(obj_desc) != ACPI_DESC_TYPE_NAMED)) {
                ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
                                  "Invalid object descriptor type: 0x%2.2X [%s] (%p)\n",
                                  ACPI_GET_DESCRIPTOR_TYPE(obj_desc),
                                  acpi_ut_get_descriptor_name(obj_desc),
                                  obj_desc));

                return_STR("Invalid object");
        }

        return_STR(acpi_ut_get_type_name(obj_desc->common.type));
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_get_node_name
 *
 * PARAMETERS:  object               - A namespace node
 *
 * RETURN:      ASCII name of the node
 *
 * DESCRIPTION: Validate the node and return the node's ACPI name.
 *
 ******************************************************************************/

const char *acpi_ut_get_node_name(void *object)
{
        struct acpi_namespace_node *node = (struct acpi_namespace_node *)object;

        /* Must return a string of exactly 4 characters == ACPI_NAMESEG_SIZE */

        if (!object) {
                return ("NULL");
        }

        /* Check for Root node */

        if ((object == ACPI_ROOT_OBJECT) || (object == acpi_gbl_root_node)) {
                return ("\"\\\" ");
        }

        /* Descriptor must be a namespace node */

        if (ACPI_GET_DESCRIPTOR_TYPE(node) != ACPI_DESC_TYPE_NAMED) {
                return ("####");
        }

        /*
         * Ensure name is valid. The name was validated/repaired when the node
         * was created, but make sure it has not been corrupted.
         */
        acpi_ut_repair_name(node->name.ascii);

        /* Return the name */

        return (node->name.ascii);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_get_descriptor_name
 *
 * PARAMETERS:  object               - An ACPI object
 *
 * RETURN:      Decoded name of the descriptor type
 *
 * DESCRIPTION: Validate object and return the descriptor type
 *
 ******************************************************************************/

/* Printable names of object descriptor types */

static const char *acpi_gbl_desc_type_names[] = {
        /* 00 */ "Not a Descriptor",
        /* 01 */ "Cached Object",
        /* 02 */ "State-Generic",
        /* 03 */ "State-Update",
        /* 04 */ "State-Package",
        /* 05 */ "State-Control",
        /* 06 */ "State-RootParseScope",
        /* 07 */ "State-ParseScope",
        /* 08 */ "State-WalkScope",
        /* 09 */ "State-Result",
        /* 10 */ "State-Notify",
        /* 11 */ "State-Thread",
        /* 12 */ "Tree Walk State",
        /* 13 */ "Parse Tree Op",
        /* 14 */ "Operand Object",
        /* 15 */ "Namespace Node"
};

const char *acpi_ut_get_descriptor_name(void *object)
{

        if (!object) {
                return ("NULL OBJECT");
        }

        if (ACPI_GET_DESCRIPTOR_TYPE(object) > ACPI_DESC_TYPE_MAX) {
                return ("Not a Descriptor");
        }

        return (acpi_gbl_desc_type_names[ACPI_GET_DESCRIPTOR_TYPE(object)]);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_get_reference_name
 *
 * PARAMETERS:  object               - An ACPI reference object
 *
 * RETURN:      Decoded name of the type of reference
 *
 * DESCRIPTION: Decode a reference object sub-type to a string.
 *
 ******************************************************************************/

/* Printable names of reference object sub-types */

static const char *acpi_gbl_ref_class_names[] = {
        /* 00 */ "Local",
        /* 01 */ "Argument",
        /* 02 */ "RefOf",
        /* 03 */ "Index",
        /* 04 */ "DdbHandle",
        /* 05 */ "Named Object",
        /* 06 */ "Debug"
};

const char *acpi_ut_get_reference_name(union acpi_operand_object *object)
{

        if (!object) {
                return ("NULL Object");
        }

        if (ACPI_GET_DESCRIPTOR_TYPE(object) != ACPI_DESC_TYPE_OPERAND) {
                return ("Not an Operand object");
        }

        if (object->common.type != ACPI_TYPE_LOCAL_REFERENCE) {
                return ("Not a Reference object");
        }

        if (object->reference.class > ACPI_REFCLASS_MAX) {
                return ("Unknown Reference class");
        }

        return (acpi_gbl_ref_class_names[object->reference.class]);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_get_mutex_name
 *
 * PARAMETERS:  mutex_id        - The predefined ID for this mutex.
 *
 * RETURN:      Decoded name of the internal mutex
 *
 * DESCRIPTION: Translate a mutex ID into a name string (Debug only)
 *
 ******************************************************************************/

/* Names for internal mutex objects, used for debug output */

static const char *acpi_gbl_mutex_names[ACPI_NUM_MUTEX] = {
        "ACPI_MTX_Interpreter",
        "ACPI_MTX_Namespace",
        "ACPI_MTX_Tables",
        "ACPI_MTX_Events",
        "ACPI_MTX_Caches",
        "ACPI_MTX_Memory",
};

const char *acpi_ut_get_mutex_name(u32 mutex_id)
{

        if (mutex_id > ACPI_MAX_MUTEX) {
                return ("Invalid Mutex ID");
        }

        return (acpi_gbl_mutex_names[mutex_id]);
}

#if defined(ACPI_DEBUG_OUTPUT) || defined(ACPI_DEBUGGER)

/*
 * Strings and procedures used for debug only
 */

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_get_notify_name
 *
 * PARAMETERS:  notify_value    - Value from the Notify() request
 *
 * RETURN:      Decoded name for the notify value
 *
 * DESCRIPTION: Translate a Notify Value to a notify namestring.
 *
 ******************************************************************************/

/* Names for Notify() values, used for debug output */

static const char *acpi_gbl_generic_notify[ACPI_GENERIC_NOTIFY_MAX + 1] = {
        /* 00 */ "Bus Check",
        /* 01 */ "Device Check",
        /* 02 */ "Device Wake",
        /* 03 */ "Eject Request",
        /* 04 */ "Device Check Light",
        /* 05 */ "Frequency Mismatch",
        /* 06 */ "Bus Mode Mismatch",
        /* 07 */ "Power Fault",
        /* 08 */ "Capabilities Check",
        /* 09 */ "Device PLD Check",
        /* 0A */ "Reserved",
        /* 0B */ "System Locality Update",
                                                                /* 0C */ "Reserved (was previously Shutdown Request)",
                                                                /* Reserved in ACPI 6.0 */
        /* 0D */ "System Resource Affinity Update",
                                                                /* 0E */ "Heterogeneous Memory Attributes Update",
                                                                /* ACPI 6.2 */
                                                /* 0F */ "Error Disconnect Recover"
                                                /* ACPI 6.3 */
};

static const char *acpi_gbl_device_notify[5] = {
        /* 80 */ "Status Change",
        /* 81 */ "Information Change",
        /* 82 */ "Device-Specific Change",
        /* 83 */ "Device-Specific Change",
        /* 84 */ "Reserved"
};

static const char *acpi_gbl_processor_notify[5] = {
        /* 80 */ "Performance Capability Change",
        /* 81 */ "C-State Change",
        /* 82 */ "Throttling Capability Change",
        /* 83 */ "Guaranteed Change",
        /* 84 */ "Minimum Excursion"
};

static const char *acpi_gbl_thermal_notify[5] = {
        /* 80 */ "Thermal Status Change",
        /* 81 */ "Thermal Trip Point Change",
        /* 82 */ "Thermal Device List Change",
        /* 83 */ "Thermal Relationship Change",
        /* 84 */ "Reserved"
};

const char *acpi_ut_get_notify_name(u32 notify_value, acpi_object_type type)
{

        /* 00 - 0F are "common to all object types" (from ACPI Spec) */

        if (notify_value <= ACPI_GENERIC_NOTIFY_MAX) {
                return (acpi_gbl_generic_notify[notify_value]);
        }

        /* 10 - 7F are reserved */

        if (notify_value <= ACPI_MAX_SYS_NOTIFY) {
                return ("Reserved");
        }

        /* 80 - 84 are per-object-type */

        if (notify_value <= ACPI_SPECIFIC_NOTIFY_MAX) {
                switch (type) {
                case ACPI_TYPE_ANY:
                case ACPI_TYPE_DEVICE:
                        return (acpi_gbl_device_notify[notify_value - 0x80]);

                case ACPI_TYPE_PROCESSOR:
                        return (acpi_gbl_processor_notify[notify_value - 0x80]);

                case ACPI_TYPE_THERMAL:
                        return (acpi_gbl_thermal_notify[notify_value - 0x80]);

                default:
                        return ("Target object type does not support notifies");
                }
        }

        /* 84 - BF are device-specific */

        if (notify_value <= ACPI_MAX_DEVICE_SPECIFIC_NOTIFY) {
                return ("Device-Specific");
        }

        /* C0 and above are hardware-specific */

        return ("Hardware-Specific");
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_get_argument_type_name
 *
 * PARAMETERS:  arg_type            - an ARGP_* parser argument type
 *
 * RETURN:      Decoded ARGP_* type
 *
 * DESCRIPTION: Decode an ARGP_* parser type, as defined in the amlcode.h file,
 *              and used in the acopcode.h file. For example, ARGP_TERMARG.
 *              Used for debug only.
 *
 ******************************************************************************/

static const char *acpi_gbl_argument_type[20] = {
        /* 00 */ "Unknown ARGP",
        /* 01 */ "ByteData",
        /* 02 */ "ByteList",
        /* 03 */ "CharList",
        /* 04 */ "DataObject",
        /* 05 */ "DataObjectList",
        /* 06 */ "DWordData",
        /* 07 */ "FieldList",
        /* 08 */ "Name",
        /* 09 */ "NameString",
        /* 0A */ "ObjectList",
        /* 0B */ "PackageLength",
        /* 0C */ "SuperName",
        /* 0D */ "Target",
        /* 0E */ "TermArg",
        /* 0F */ "TermList",
        /* 10 */ "WordData",
        /* 11 */ "QWordData",
        /* 12 */ "SimpleName",
        /* 13 */ "NameOrRef"
};

const char *acpi_ut_get_argument_type_name(u32 arg_type)
{

        if (arg_type > ARGP_MAX) {
                return ("Unknown ARGP");
        }

        return (acpi_gbl_argument_type[arg_type]);
}

#endif

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_valid_object_type
 *
 * PARAMETERS:  type            - Object type to be validated
 *
 * RETURN:      TRUE if valid object type, FALSE otherwise
 *
 * DESCRIPTION: Validate an object type
 *
 ******************************************************************************/

u8 acpi_ut_valid_object_type(acpi_object_type type)
{

        if (type > ACPI_TYPE_LOCAL_MAX) {

                /* Note: Assumes all TYPEs are contiguous (external/local) */

                return (FALSE);
        }

        return (TRUE);
}