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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/*******************************************************************************
*
* Module Name: utexcep - Exception code support
*
******************************************************************************/
#define EXPORT_ACPI_INTERFACES
#define ACPI_DEFINE_EXCEPTION_TABLE
#include <acpi/acpi.h>
#include "accommon.h"
#define _COMPONENT ACPI_UTILITIES
ACPI_MODULE_NAME("utexcep")
/*******************************************************************************
*
* FUNCTION: acpi_format_exception
*
* PARAMETERS: status - The acpi_status code to be formatted
*
* RETURN: A string containing the exception text. A valid pointer is
* always returned.
*
* DESCRIPTION: This function translates an ACPI exception into an ASCII
* string. Returns "unknown status" string for invalid codes.
*
******************************************************************************/
const char *acpi_format_exception(acpi_status status)
{
const struct acpi_exception_info *exception;
ACPI_FUNCTION_ENTRY();
exception = acpi_ut_validate_exception(status);
if (!exception) {
/* Exception code was not recognized */
ACPI_ERROR((AE_INFO,
"Unknown exception code: 0x%8.8X", status));
return ("UNKNOWN_STATUS_CODE");
}
return (exception->name);
}
ACPI_EXPORT_SYMBOL(acpi_format_exception)
/*******************************************************************************
*
* FUNCTION: acpi_ut_validate_exception
*
* PARAMETERS: status - The acpi_status code to be formatted
*
* RETURN: A string containing the exception text. NULL if exception is
* not valid.
*
* DESCRIPTION: This function validates and translates an ACPI exception into
* an ASCII string.
*
******************************************************************************/
const struct acpi_exception_info *acpi_ut_validate_exception(acpi_status status)
{
u32 sub_status;
const struct acpi_exception_info *exception = NULL;
ACPI_FUNCTION_ENTRY();
/*
* Status is composed of two parts, a "type" and an actual code
*/
sub_status = (status & ~AE_CODE_MASK);
switch (status & AE_CODE_MASK) {
case AE_CODE_ENVIRONMENTAL:
if (sub_status <= AE_CODE_ENV_MAX) {
exception = &acpi_gbl_exception_names_env[sub_status];
}
break;
case AE_CODE_PROGRAMMER:
if (sub_status <= AE_CODE_PGM_MAX) {
exception = &acpi_gbl_exception_names_pgm[sub_status];
}
break;
case AE_CODE_ACPI_TABLES:
if (sub_status <= AE_CODE_TBL_MAX) {
exception = &acpi_gbl_exception_names_tbl[sub_status];
}
break;
case AE_CODE_AML:
if (sub_status <= AE_CODE_AML_MAX) {
exception = &acpi_gbl_exception_names_aml[sub_status];
}
break;
case AE_CODE_CONTROL:
if (sub_status <= AE_CODE_CTRL_MAX) {
exception = &acpi_gbl_exception_names_ctrl[sub_status];
}
break;
default:
break;
}
if (!exception || !exception->name) {
return (NULL);
}
return (exception);
}
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