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1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: tbprint - Table output utilities | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
82a80941 | 8 | * Copyright (C) 2000 - 2015, Intel Corp. |
42f47869 BM |
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 | #include <acpi/acpi.h> | |
45 | #include "accommon.h" | |
46 | #include "actables.h" | |
47 | ||
48 | #define _COMPONENT ACPI_TABLES | |
49 | ACPI_MODULE_NAME("tbprint") | |
50 | ||
51 | /* Local prototypes */ | |
52 | static void acpi_tb_fix_string(char *string, acpi_size length); | |
53 | ||
54 | static void | |
55 | acpi_tb_cleanup_table_header(struct acpi_table_header *out_header, | |
56 | struct acpi_table_header *header); | |
57 | ||
58 | /******************************************************************************* | |
59 | * | |
60 | * FUNCTION: acpi_tb_fix_string | |
61 | * | |
62 | * PARAMETERS: string - String to be repaired | |
63 | * length - Maximum length | |
64 | * | |
65 | * RETURN: None | |
66 | * | |
67 | * DESCRIPTION: Replace every non-printable or non-ascii byte in the string | |
68 | * with a question mark '?'. | |
69 | * | |
70 | ******************************************************************************/ | |
71 | ||
72 | static void acpi_tb_fix_string(char *string, acpi_size length) | |
73 | { | |
74 | ||
75 | while (length && *string) { | |
4fa4616e | 76 | if (!isprint((int)*string)) { |
42f47869 BM |
77 | *string = '?'; |
78 | } | |
79 | string++; | |
80 | length--; | |
81 | } | |
82 | } | |
83 | ||
84 | /******************************************************************************* | |
85 | * | |
86 | * FUNCTION: acpi_tb_cleanup_table_header | |
87 | * | |
88 | * PARAMETERS: out_header - Where the cleaned header is returned | |
89 | * header - Input ACPI table header | |
90 | * | |
91 | * RETURN: Returns the cleaned header in out_header | |
92 | * | |
93 | * DESCRIPTION: Copy the table header and ensure that all "string" fields in | |
94 | * the header consist of printable characters. | |
95 | * | |
96 | ******************************************************************************/ | |
97 | ||
98 | static void | |
99 | acpi_tb_cleanup_table_header(struct acpi_table_header *out_header, | |
100 | struct acpi_table_header *header) | |
101 | { | |
102 | ||
4fa4616e | 103 | memcpy(out_header, header, sizeof(struct acpi_table_header)); |
42f47869 BM |
104 | |
105 | acpi_tb_fix_string(out_header->signature, ACPI_NAME_SIZE); | |
106 | acpi_tb_fix_string(out_header->oem_id, ACPI_OEM_ID_SIZE); | |
107 | acpi_tb_fix_string(out_header->oem_table_id, ACPI_OEM_TABLE_ID_SIZE); | |
108 | acpi_tb_fix_string(out_header->asl_compiler_id, ACPI_NAME_SIZE); | |
109 | } | |
110 | ||
111 | /******************************************************************************* | |
112 | * | |
113 | * FUNCTION: acpi_tb_print_table_header | |
114 | * | |
115 | * PARAMETERS: address - Table physical address | |
116 | * header - Table header | |
117 | * | |
118 | * RETURN: None | |
119 | * | |
120 | * DESCRIPTION: Print an ACPI table header. Special cases for FACS and RSDP. | |
121 | * | |
122 | ******************************************************************************/ | |
123 | ||
124 | void | |
125 | acpi_tb_print_table_header(acpi_physical_address address, | |
126 | struct acpi_table_header *header) | |
127 | { | |
128 | struct acpi_table_header local_header; | |
129 | ||
42f47869 BM |
130 | if (ACPI_COMPARE_NAME(header->signature, ACPI_SIG_FACS)) { |
131 | ||
132 | /* FACS only has signature and length fields */ | |
133 | ||
1d0a0b2f LZ |
134 | ACPI_INFO((AE_INFO, "%-4.4s 0x%8.8X%8.8X %06X", |
135 | header->signature, ACPI_FORMAT_UINT64(address), | |
42f47869 | 136 | header->length)); |
cacba865 | 137 | } else if (ACPI_VALIDATE_RSDP_SIG(header->signature)) { |
42f47869 BM |
138 | |
139 | /* RSDP has no common fields */ | |
140 | ||
4fa4616e BM |
141 | memcpy(local_header.oem_id, |
142 | ACPI_CAST_PTR(struct acpi_table_rsdp, header)->oem_id, | |
143 | ACPI_OEM_ID_SIZE); | |
42f47869 BM |
144 | acpi_tb_fix_string(local_header.oem_id, ACPI_OEM_ID_SIZE); |
145 | ||
1d0a0b2f LZ |
146 | ACPI_INFO((AE_INFO, "RSDP 0x%8.8X%8.8X %06X (v%.2d %-6.6s)", |
147 | ACPI_FORMAT_UINT64(address), | |
42f47869 BM |
148 | (ACPI_CAST_PTR(struct acpi_table_rsdp, header)-> |
149 | revision > | |
150 | 0) ? ACPI_CAST_PTR(struct acpi_table_rsdp, | |
151 | header)->length : 20, | |
152 | ACPI_CAST_PTR(struct acpi_table_rsdp, | |
153 | header)->revision, | |
154 | local_header.oem_id)); | |
155 | } else { | |
156 | /* Standard ACPI table with full common header */ | |
157 | ||
158 | acpi_tb_cleanup_table_header(&local_header, header); | |
159 | ||
160 | ACPI_INFO((AE_INFO, | |
1d0a0b2f | 161 | "%-4.4s 0x%8.8X%8.8X" |
c03775c0 | 162 | " %06X (v%.2d %-6.6s %-8.8s %08X %-4.4s %08X)", |
1d0a0b2f | 163 | local_header.signature, ACPI_FORMAT_UINT64(address), |
42f47869 BM |
164 | local_header.length, local_header.revision, |
165 | local_header.oem_id, local_header.oem_table_id, | |
166 | local_header.oem_revision, | |
167 | local_header.asl_compiler_id, | |
168 | local_header.asl_compiler_revision)); | |
169 | } | |
170 | } | |
171 | ||
172 | /******************************************************************************* | |
173 | * | |
174 | * FUNCTION: acpi_tb_validate_checksum | |
175 | * | |
176 | * PARAMETERS: table - ACPI table to verify | |
177 | * length - Length of entire table | |
178 | * | |
179 | * RETURN: Status | |
180 | * | |
181 | * DESCRIPTION: Verifies that the table checksums to zero. Optionally returns | |
182 | * exception on bad checksum. | |
183 | * | |
184 | ******************************************************************************/ | |
185 | ||
186 | acpi_status acpi_tb_verify_checksum(struct acpi_table_header *table, u32 length) | |
187 | { | |
188 | u8 checksum; | |
189 | ||
94d4be67 LZ |
190 | /* |
191 | * FACS/S3PT: | |
192 | * They are the odd tables, have no standard ACPI header and no checksum | |
193 | */ | |
194 | ||
195 | if (ACPI_COMPARE_NAME(table->signature, ACPI_SIG_S3PT) || | |
196 | ACPI_COMPARE_NAME(table->signature, ACPI_SIG_FACS)) { | |
197 | return (AE_OK); | |
198 | } | |
199 | ||
42f47869 BM |
200 | /* Compute the checksum on the table */ |
201 | ||
202 | checksum = acpi_tb_checksum(ACPI_CAST_PTR(u8, table), length); | |
203 | ||
204 | /* Checksum ok? (should be zero) */ | |
205 | ||
206 | if (checksum) { | |
207 | ACPI_BIOS_WARNING((AE_INFO, | |
208 | "Incorrect checksum in table [%4.4s] - 0x%2.2X, " | |
209 | "should be 0x%2.2X", | |
210 | table->signature, table->checksum, | |
211 | (u8)(table->checksum - checksum))); | |
212 | ||
213 | #if (ACPI_CHECKSUM_ABORT) | |
214 | return (AE_BAD_CHECKSUM); | |
215 | #endif | |
216 | } | |
217 | ||
218 | return (AE_OK); | |
219 | } | |
220 | ||
221 | /******************************************************************************* | |
222 | * | |
223 | * FUNCTION: acpi_tb_checksum | |
224 | * | |
225 | * PARAMETERS: buffer - Pointer to memory region to be checked | |
226 | * length - Length of this memory region | |
227 | * | |
228 | * RETURN: Checksum (u8) | |
229 | * | |
230 | * DESCRIPTION: Calculates circular checksum of memory region. | |
231 | * | |
232 | ******************************************************************************/ | |
233 | ||
234 | u8 acpi_tb_checksum(u8 *buffer, u32 length) | |
235 | { | |
236 | u8 sum = 0; | |
237 | u8 *end = buffer + length; | |
238 | ||
239 | while (buffer < end) { | |
240 | sum = (u8)(sum + *(buffer++)); | |
241 | } | |
242 | ||
243 | return (sum); | |
244 | } |