1 /****************************************************************************** 2 * 3 * Module Name: tbprint - Table output utilities 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2013, 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 #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) { 76 if (!ACPI_IS_PRINT(*string)) { 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 { 102 103 ACPI_MEMCPY(out_header, header, sizeof(struct acpi_table_header)); 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; 129 130 /* 131 * The reason that the Address is cast to a void pointer is so that we 132 * can use %p which will work properly on both 32-bit and 64-bit hosts. 133 */ 134 if (ACPI_COMPARE_NAME(header->signature, ACPI_SIG_FACS)) { 135 136 /* FACS only has signature and length fields */ 137 138 ACPI_INFO((AE_INFO, "%4.4s %p %06X", 139 header->signature, ACPI_CAST_PTR(void, address), 140 header->length)); 141 } else if (ACPI_VALIDATE_RSDP_SIG(header->signature)) { 142 143 /* RSDP has no common fields */ 144 145 ACPI_MEMCPY(local_header.oem_id, 146 ACPI_CAST_PTR(struct acpi_table_rsdp, 147 header)->oem_id, ACPI_OEM_ID_SIZE); 148 acpi_tb_fix_string(local_header.oem_id, ACPI_OEM_ID_SIZE); 149 150 ACPI_INFO((AE_INFO, "RSDP %p %06X (v%.2d %6.6s)", 151 ACPI_CAST_PTR(void, address), 152 (ACPI_CAST_PTR(struct acpi_table_rsdp, header)-> 153 revision > 154 0) ? ACPI_CAST_PTR(struct acpi_table_rsdp, 155 header)->length : 20, 156 ACPI_CAST_PTR(struct acpi_table_rsdp, 157 header)->revision, 158 local_header.oem_id)); 159 } else { 160 /* Standard ACPI table with full common header */ 161 162 acpi_tb_cleanup_table_header(&local_header, header); 163 164 ACPI_INFO((AE_INFO, 165 "%4.4s %p %06X (v%.2d %6.6s %8.8s %08X %4.4s %08X)", 166 local_header.signature, ACPI_CAST_PTR(void, address), 167 local_header.length, local_header.revision, 168 local_header.oem_id, local_header.oem_table_id, 169 local_header.oem_revision, 170 local_header.asl_compiler_id, 171 local_header.asl_compiler_revision)); 172 } 173 } 174 175 /******************************************************************************* 176 * 177 * FUNCTION: acpi_tb_validate_checksum 178 * 179 * PARAMETERS: table - ACPI table to verify 180 * length - Length of entire table 181 * 182 * RETURN: Status 183 * 184 * DESCRIPTION: Verifies that the table checksums to zero. Optionally returns 185 * exception on bad checksum. 186 * 187 ******************************************************************************/ 188 189 acpi_status acpi_tb_verify_checksum(struct acpi_table_header *table, u32 length) 190 { 191 u8 checksum; 192 193 /* 194 * FACS/S3PT: 195 * They are the odd tables, have no standard ACPI header and no checksum 196 */ 197 198 if (ACPI_COMPARE_NAME(table->signature, ACPI_SIG_S3PT) || 199 ACPI_COMPARE_NAME(table->signature, ACPI_SIG_FACS)) { 200 return (AE_OK); 201 } 202 203 /* Compute the checksum on the table */ 204 205 checksum = acpi_tb_checksum(ACPI_CAST_PTR(u8, table), length); 206 207 /* Checksum ok? (should be zero) */ 208 209 if (checksum) { 210 ACPI_BIOS_WARNING((AE_INFO, 211 "Incorrect checksum in table [%4.4s] - 0x%2.2X, " 212 "should be 0x%2.2X", 213 table->signature, table->checksum, 214 (u8)(table->checksum - checksum))); 215 216 #if (ACPI_CHECKSUM_ABORT) 217 return (AE_BAD_CHECKSUM); 218 #endif 219 } 220 221 return (AE_OK); 222 } 223 224 /******************************************************************************* 225 * 226 * FUNCTION: acpi_tb_checksum 227 * 228 * PARAMETERS: buffer - Pointer to memory region to be checked 229 * length - Length of this memory region 230 * 231 * RETURN: Checksum (u8) 232 * 233 * DESCRIPTION: Calculates circular checksum of memory region. 234 * 235 ******************************************************************************/ 236 237 u8 acpi_tb_checksum(u8 *buffer, u32 length) 238 { 239 u8 sum = 0; 240 u8 *end = buffer + length; 241 242 while (buffer < end) { 243 sum = (u8)(sum + *(buffer++)); 244 } 245 246 return (sum); 247 } 248