1 /*******************************************************************************
3 * Module Name: utexcep - Exception code support
5 ******************************************************************************/
8 * Copyright (C) 2000 - 2012, Intel Corp.
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23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
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44 #define ACPI_DEFINE_EXCEPTION_TABLE
45 #include <linux/export.h>
46 #include <acpi/acpi.h>
49 #define _COMPONENT ACPI_UTILITIES
50 ACPI_MODULE_NAME("utexcep")
52 /*******************************************************************************
54 * FUNCTION: acpi_format_exception
56 * PARAMETERS: status - The acpi_status code to be formatted
58 * RETURN: A string containing the exception text. A valid pointer is
61 * DESCRIPTION: This function translates an ACPI exception into an ASCII
62 * string. Returns "unknown status" string for invalid codes.
64 ******************************************************************************/
65 const char *acpi_format_exception(acpi_status status)
67 const char *exception = NULL;
69 ACPI_FUNCTION_ENTRY();
71 exception = acpi_ut_validate_exception(status);
74 /* Exception code was not recognized */
77 "Unknown exception code: 0x%8.8X", status));
79 exception = "UNKNOWN_STATUS_CODE";
82 return (ACPI_CAST_PTR(const char, exception));
85 ACPI_EXPORT_SYMBOL(acpi_format_exception)
87 /*******************************************************************************
89 * FUNCTION: acpi_ut_validate_exception
91 * PARAMETERS: status - The acpi_status code to be formatted
93 * RETURN: A string containing the exception text. NULL if exception is
96 * DESCRIPTION: This function validates and translates an ACPI exception into
99 ******************************************************************************/
100 const char *acpi_ut_validate_exception(acpi_status status)
103 const char *exception = NULL;
105 ACPI_FUNCTION_ENTRY();
108 * Status is composed of two parts, a "type" and an actual code
110 sub_status = (status & ~AE_CODE_MASK);
112 switch (status & AE_CODE_MASK) {
113 case AE_CODE_ENVIRONMENTAL:
115 if (sub_status <= AE_CODE_ENV_MAX) {
116 exception = acpi_gbl_exception_names_env[sub_status];
120 case AE_CODE_PROGRAMMER:
122 if (sub_status <= AE_CODE_PGM_MAX) {
123 exception = acpi_gbl_exception_names_pgm[sub_status];
127 case AE_CODE_ACPI_TABLES:
129 if (sub_status <= AE_CODE_TBL_MAX) {
130 exception = acpi_gbl_exception_names_tbl[sub_status];
136 if (sub_status <= AE_CODE_AML_MAX) {
137 exception = acpi_gbl_exception_names_aml[sub_status];
141 case AE_CODE_CONTROL:
143 if (sub_status <= AE_CODE_CTRL_MAX) {
144 exception = acpi_gbl_exception_names_ctrl[sub_status];
152 return (ACPI_CAST_PTR(const char, exception));