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1 | /******************************************************************************* |
2 | * | |
3 | * Module Name: utexcep - Exception code support | |
4 | * | |
5 | ******************************************************************************/ | |
6 | ||
7 | /* | |
25f044e6 | 8 | * Copyright (C) 2000 - 2013, Intel Corp. |
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9 | * All rights reserved. |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions | |
13 | * are met: | |
14 | * 1. Redistributions of source code must retain the above copyright | |
15 | * notice, this list of conditions, and the following disclaimer, | |
16 | * without modification. | |
17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
18 | * substantially similar to the "NO WARRANTY" disclaimer below | |
19 | * ("Disclaimer") and any redistribution must be conditioned upon | |
20 | * including a substantially similar Disclaimer requirement for further | |
21 | * binary redistribution. | |
22 | * 3. Neither the names of the above-listed copyright holders nor the names | |
23 | * of any contributors may be used to endorse or promote products derived | |
24 | * from this software without specific prior written permission. | |
25 | * | |
26 | * Alternatively, this software may be distributed under the terms of the | |
27 | * GNU General Public License ("GPL") version 2 as published by the Free | |
28 | * Software Foundation. | |
29 | * | |
30 | * NO WARRANTY | |
31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
41 | * POSSIBILITY OF SUCH DAMAGES. | |
42 | */ | |
43 | ||
44 | #define ACPI_DEFINE_EXCEPTION_TABLE | |
45 | #include <linux/export.h> | |
46 | #include <acpi/acpi.h> | |
47 | #include "accommon.h" | |
48 | ||
49 | #define _COMPONENT ACPI_UTILITIES | |
50 | ACPI_MODULE_NAME("utexcep") | |
51 | ||
52 | /******************************************************************************* | |
53 | * | |
54 | * FUNCTION: acpi_format_exception | |
55 | * | |
56 | * PARAMETERS: status - The acpi_status code to be formatted | |
57 | * | |
58 | * RETURN: A string containing the exception text. A valid pointer is | |
59 | * always returned. | |
60 | * | |
61 | * DESCRIPTION: This function translates an ACPI exception into an ASCII | |
62 | * string. Returns "unknown status" string for invalid codes. | |
63 | * | |
64 | ******************************************************************************/ | |
65 | const char *acpi_format_exception(acpi_status status) | |
66 | { | |
ae1b4769 | 67 | const struct acpi_exception_info *exception; |
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68 | |
69 | ACPI_FUNCTION_ENTRY(); | |
70 | ||
71 | exception = acpi_ut_validate_exception(status); | |
72 | if (!exception) { | |
73 | ||
74 | /* Exception code was not recognized */ | |
75 | ||
76 | ACPI_ERROR((AE_INFO, | |
77 | "Unknown exception code: 0x%8.8X", status)); | |
78 | ||
ae1b4769 | 79 | return ("UNKNOWN_STATUS_CODE"); |
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80 | } |
81 | ||
ae1b4769 | 82 | return (exception->name); |
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83 | } |
84 | ||
85 | ACPI_EXPORT_SYMBOL(acpi_format_exception) | |
86 | ||
87 | /******************************************************************************* | |
88 | * | |
89 | * FUNCTION: acpi_ut_validate_exception | |
90 | * | |
91 | * PARAMETERS: status - The acpi_status code to be formatted | |
92 | * | |
93 | * RETURN: A string containing the exception text. NULL if exception is | |
94 | * not valid. | |
95 | * | |
96 | * DESCRIPTION: This function validates and translates an ACPI exception into | |
97 | * an ASCII string. | |
98 | * | |
99 | ******************************************************************************/ | |
ae1b4769 | 100 | const struct acpi_exception_info *acpi_ut_validate_exception(acpi_status status) |
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101 | { |
102 | u32 sub_status; | |
ae1b4769 | 103 | const struct acpi_exception_info *exception = NULL; |
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104 | |
105 | ACPI_FUNCTION_ENTRY(); | |
106 | ||
107 | /* | |
108 | * Status is composed of two parts, a "type" and an actual code | |
109 | */ | |
110 | sub_status = (status & ~AE_CODE_MASK); | |
111 | ||
112 | switch (status & AE_CODE_MASK) { | |
113 | case AE_CODE_ENVIRONMENTAL: | |
114 | ||
115 | if (sub_status <= AE_CODE_ENV_MAX) { | |
ae1b4769 | 116 | exception = &acpi_gbl_exception_names_env[sub_status]; |
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117 | } |
118 | break; | |
119 | ||
120 | case AE_CODE_PROGRAMMER: | |
121 | ||
122 | if (sub_status <= AE_CODE_PGM_MAX) { | |
ae1b4769 | 123 | exception = &acpi_gbl_exception_names_pgm[sub_status]; |
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124 | } |
125 | break; | |
126 | ||
127 | case AE_CODE_ACPI_TABLES: | |
128 | ||
129 | if (sub_status <= AE_CODE_TBL_MAX) { | |
ae1b4769 | 130 | exception = &acpi_gbl_exception_names_tbl[sub_status]; |
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131 | } |
132 | break; | |
133 | ||
134 | case AE_CODE_AML: | |
135 | ||
136 | if (sub_status <= AE_CODE_AML_MAX) { | |
ae1b4769 | 137 | exception = &acpi_gbl_exception_names_aml[sub_status]; |
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138 | } |
139 | break; | |
140 | ||
141 | case AE_CODE_CONTROL: | |
142 | ||
143 | if (sub_status <= AE_CODE_CTRL_MAX) { | |
ae1b4769 | 144 | exception = &acpi_gbl_exception_names_ctrl[sub_status]; |
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145 | } |
146 | break; | |
147 | ||
148 | default: | |
1d1ea1b7 | 149 | |
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150 | break; |
151 | } | |
152 | ||
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153 | if (!exception || !exception->name) { |
154 | return (NULL); | |
155 | } | |
156 | ||
157 | return (exception); | |
bc7db145 | 158 | } |