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gerrit.nordix.org / codeaurora / cp-linux / 8d8f6542b666daf5e87de156590e635c2c4da0c0 / . / drivers / acpi / acpica / utexcep.c
blob: 743a0ae9fb17a655e708953f8ff78175fdbaa904 [file] [log] [blame]
Kyle Swenson8d8f6542021-03-15 11:02:55 -0600[diff] [blame^]1/*******************************************************************************
2 *
3 * Module Name: utexcep - Exception code support
4 *
5 ******************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2015, Intel Corp.
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 EXPORT_ACPI_INTERFACES
45
46#define ACPI_DEFINE_EXCEPTION_TABLE
47#include <acpi/acpi.h>
48#include "accommon.h"
49
50#define _COMPONENT ACPI_UTILITIES
51ACPI_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 ******************************************************************************/
66const char *acpi_format_exception(acpi_status status)
67{
68 const struct acpi_exception_info *exception;
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
80 return ("UNKNOWN_STATUS_CODE");
81 }
82
83 return (exception->name);
84}
85
86ACPI_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 ******************************************************************************/
101const struct acpi_exception_info *acpi_ut_validate_exception(acpi_status status)
102{
103 u32 sub_status;
104 const struct acpi_exception_info *exception = NULL;
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) {
117 exception = &acpi_gbl_exception_names_env[sub_status];
118 }
119 break;
120
121 case AE_CODE_PROGRAMMER:
122
123 if (sub_status <= AE_CODE_PGM_MAX) {
124 exception = &acpi_gbl_exception_names_pgm[sub_status];
125 }
126 break;
127
128 case AE_CODE_ACPI_TABLES:
129
130 if (sub_status <= AE_CODE_TBL_MAX) {
131 exception = &acpi_gbl_exception_names_tbl[sub_status];
132 }
133 break;
134
135 case AE_CODE_AML:
136
137 if (sub_status <= AE_CODE_AML_MAX) {
138 exception = &acpi_gbl_exception_names_aml[sub_status];
139 }
140 break;
141
142 case AE_CODE_CONTROL:
143
144 if (sub_status <= AE_CODE_CTRL_MAX) {
145 exception = &acpi_gbl_exception_names_ctrl[sub_status];
146 }
147 break;
148
149 default:
150
151 break;
152 }
153
154 if (!exception || !exception->name) {
155 return (NULL);
156 }
157
158 return (exception);
159}