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