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1 | /******************************************************************************* |
2 | * | |
3 | * Module Name: utexcep - Exception code support | |
4 | * | |
5 | ******************************************************************************/ | |
6 | ||
7 | /* | |
c8100dc4 | 8 | * Copyright (C) 2000 - 2016, 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 | ||
839e928f LZ |
44 | #define EXPORT_ACPI_INTERFACES |
45 | ||
bc7db145 | 46 | #define ACPI_DEFINE_EXCEPTION_TABLE |
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47 | #include <acpi/acpi.h> |
48 | #include "accommon.h" | |
49 | ||
50 | #define _COMPONENT ACPI_UTILITIES | |
51 | ACPI_MODULE_NAME("utexcep") | |
52 | ||
53 | /******************************************************************************* | |
54 | * | |
55 | * FUNCTION: acpi_format_exception | |
56 | * | |
57 | * PARAMETERS: status - The acpi_status code to be formatted | |
58 | * | |
59 | * RETURN: A string containing the exception text. A valid pointer is | |
60 | * always returned. | |
61 | * | |
62 | * DESCRIPTION: This function translates an ACPI exception into an ASCII | |
63 | * string. Returns "unknown status" string for invalid codes. | |
64 | * | |
65 | ******************************************************************************/ | |
66 | const char *acpi_format_exception(acpi_status status) | |
67 | { | |
ae1b4769 | 68 | const struct acpi_exception_info *exception; |
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69 | |
70 | ACPI_FUNCTION_ENTRY(); | |
71 | ||
72 | exception = acpi_ut_validate_exception(status); | |
73 | if (!exception) { | |
74 | ||
75 | /* Exception code was not recognized */ | |
76 | ||
77 | ACPI_ERROR((AE_INFO, | |
78 | "Unknown exception code: 0x%8.8X", status)); | |
79 | ||
ae1b4769 | 80 | return ("UNKNOWN_STATUS_CODE"); |
bc7db145 BM |
81 | } |
82 | ||
ae1b4769 | 83 | return (exception->name); |
bc7db145 BM |
84 | } |
85 | ||
86 | ACPI_EXPORT_SYMBOL(acpi_format_exception) | |
87 | ||
88 | /******************************************************************************* | |
89 | * | |
90 | * FUNCTION: acpi_ut_validate_exception | |
91 | * | |
92 | * PARAMETERS: status - The acpi_status code to be formatted | |
93 | * | |
94 | * RETURN: A string containing the exception text. NULL if exception is | |
95 | * not valid. | |
96 | * | |
97 | * DESCRIPTION: This function validates and translates an ACPI exception into | |
98 | * an ASCII string. | |
99 | * | |
100 | ******************************************************************************/ | |
ae1b4769 | 101 | const struct acpi_exception_info *acpi_ut_validate_exception(acpi_status status) |
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102 | { |
103 | u32 sub_status; | |
ae1b4769 | 104 | const struct acpi_exception_info *exception = NULL; |
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105 | |
106 | ACPI_FUNCTION_ENTRY(); | |
107 | ||
108 | /* | |
109 | * Status is composed of two parts, a "type" and an actual code | |
110 | */ | |
111 | sub_status = (status & ~AE_CODE_MASK); | |
112 | ||
113 | switch (status & AE_CODE_MASK) { | |
114 | case AE_CODE_ENVIRONMENTAL: | |
115 | ||
116 | if (sub_status <= AE_CODE_ENV_MAX) { | |
ae1b4769 | 117 | exception = &acpi_gbl_exception_names_env[sub_status]; |
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118 | } |
119 | break; | |
120 | ||
121 | case AE_CODE_PROGRAMMER: | |
122 | ||
123 | if (sub_status <= AE_CODE_PGM_MAX) { | |
ae1b4769 | 124 | exception = &acpi_gbl_exception_names_pgm[sub_status]; |
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125 | } |
126 | break; | |
127 | ||
128 | case AE_CODE_ACPI_TABLES: | |
129 | ||
130 | if (sub_status <= AE_CODE_TBL_MAX) { | |
ae1b4769 | 131 | exception = &acpi_gbl_exception_names_tbl[sub_status]; |
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132 | } |
133 | break; | |
134 | ||
135 | case AE_CODE_AML: | |
136 | ||
137 | if (sub_status <= AE_CODE_AML_MAX) { | |
ae1b4769 | 138 | exception = &acpi_gbl_exception_names_aml[sub_status]; |
bc7db145 BM |
139 | } |
140 | break; | |
141 | ||
142 | case AE_CODE_CONTROL: | |
143 | ||
144 | if (sub_status <= AE_CODE_CTRL_MAX) { | |
ae1b4769 | 145 | exception = &acpi_gbl_exception_names_ctrl[sub_status]; |
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146 | } |
147 | break; | |
148 | ||
149 | default: | |
1d1ea1b7 | 150 | |
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151 | break; |
152 | } | |
153 | ||
ae1b4769 BM |
154 | if (!exception || !exception->name) { |
155 | return (NULL); | |
156 | } | |
157 | ||
158 | return (exception); | |
bc7db145 | 159 | } |