Stefan Reinauer | 6540ae5 | 2007-07-12 16:35:42 +0000 | [diff] [blame] | 1 | /*****************************************************************************\ |
| 2 | * input_file.c |
Uwe Hermann | 1a6177b | 2008-01-25 15:08:37 +0000 | [diff] [blame^] | 3 | * $Id$ |
Stefan Reinauer | 6540ae5 | 2007-07-12 16:35:42 +0000 | [diff] [blame] | 4 | ***************************************************************************** |
| 5 | * Copyright (C) 2002-2005 The Regents of the University of California. |
| 6 | * Produced at the Lawrence Livermore National Laboratory. |
| 7 | * Written by David S. Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>. |
| 8 | * UCRL-CODE-2003-012 |
| 9 | * All rights reserved. |
| 10 | * |
Stefan Reinauer | f527e70 | 2008-01-18 15:33:49 +0000 | [diff] [blame] | 11 | * This file is part of lxbios, a utility for reading/writing coreboot |
| 12 | * parameters and displaying information from the coreboot table. |
Uwe Hermann | 1a6177b | 2008-01-25 15:08:37 +0000 | [diff] [blame^] | 13 | * For details, see http://coreboot.org/Lxbios. |
Stefan Reinauer | 6540ae5 | 2007-07-12 16:35:42 +0000 | [diff] [blame] | 14 | * |
| 15 | * Please also read the file DISCLAIMER which is included in this software |
| 16 | * distribution. |
| 17 | * |
| 18 | * This program is free software; you can redistribute it and/or modify it |
| 19 | * under the terms of the GNU General Public License (as published by the |
| 20 | * Free Software Foundation) version 2, dated June 1991. |
| 21 | * |
| 22 | * This program is distributed in the hope that it will be useful, but |
| 23 | * WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF |
| 24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the terms and |
| 25 | * conditions of the GNU General Public License for more details. |
| 26 | * |
| 27 | * You should have received a copy of the GNU General Public License along |
| 28 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 29 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 30 | \*****************************************************************************/ |
| 31 | |
| 32 | #include "common.h" |
| 33 | #include "input_file.h" |
| 34 | #include "layout.h" |
| 35 | #include "cmos_ops.h" |
| 36 | #include "cmos_lowlevel.h" |
| 37 | #include "reg_expr.h" |
| 38 | |
| 39 | static int get_input_file_line (FILE *f, char line[], int line_buf_size); |
| 40 | static unsigned long long try_prepare_cmos_write (const cmos_entry_t *e, |
| 41 | const char value_str[]); |
| 42 | |
| 43 | /* matches either a blank line or a comment line */ |
| 44 | static const char blank_or_comment_regex[] = |
| 45 | /* a blank line */ |
| 46 | "(^[[:space:]]+$)" |
| 47 | |
| 48 | "|" /* or ... */ |
| 49 | |
| 50 | /* a line consisting of: optional whitespace followed by */ |
| 51 | "(^[[:space:]]*" |
| 52 | /* a '#' character and optionally, additional characters */ |
| 53 | "#.*$)"; |
| 54 | |
| 55 | /* matches an assignment line */ |
| 56 | const char assignment_regex[] = |
| 57 | /* optional whitespace */ |
| 58 | "^[[:space:]]*" |
Stefan Reinauer | f527e70 | 2008-01-18 15:33:49 +0000 | [diff] [blame] | 59 | /* followed by a coreboot parameter name */ |
Stefan Reinauer | 6540ae5 | 2007-07-12 16:35:42 +0000 | [diff] [blame] | 60 | "([^[:space:]]+)" |
| 61 | /* followed by optional whitespace */ |
| 62 | "[[:space:]]*" |
| 63 | /* followed by an '=' character */ |
| 64 | "=" |
| 65 | /* followed by optional whitespace */ |
| 66 | "[[:space:]]*" |
| 67 | /* followed by a value that may contain embedded whitespace */ |
| 68 | "([^[:space:]]+([[:space:]]+[^[:space:]]+)*)+" |
| 69 | /* followed by optional whitespace */ |
| 70 | "[[:space:]]*$"; |
| 71 | |
| 72 | static int line_num; |
| 73 | |
| 74 | /**************************************************************************** |
| 75 | * process_input_file |
| 76 | * |
| 77 | * Read the contents of file 'f' and return a pointer to a list of pending |
| 78 | * write operations. Perform sanity checking on all write operations and |
| 79 | * exit with an error message if there is a problem. |
| 80 | ****************************************************************************/ |
| 81 | cmos_write_t * process_input_file (FILE *f) |
| 82 | { |
| 83 | static const int LINE_BUF_SIZE = 256; |
| 84 | static const size_t N_MATCHES = 4; |
| 85 | char line[LINE_BUF_SIZE]; |
| 86 | const char *name, *value; |
| 87 | cmos_write_t *list, *item, **p; |
| 88 | regex_t blank_or_comment, assignment; |
| 89 | regmatch_t match[N_MATCHES]; |
| 90 | const cmos_entry_t *e; |
| 91 | |
| 92 | list = NULL; |
| 93 | p = &list; |
| 94 | |
| 95 | compile_reg_exprs(REG_EXTENDED | REG_NEWLINE, 2, blank_or_comment_regex, |
| 96 | &blank_or_comment, assignment_regex, &assignment); |
| 97 | |
| 98 | /* each iteration processes one line from input file */ |
| 99 | for (line_num = 1; |
| 100 | get_input_file_line(f, line, LINE_BUF_SIZE) == OK; |
| 101 | line_num++) |
| 102 | { /* skip comments and blank lines */ |
| 103 | if (!regexec(&blank_or_comment, line, 0, NULL, 0)) |
| 104 | continue; |
| 105 | |
| 106 | /* Is this a valid assignment line? If not, then it's a syntax |
| 107 | * error. |
| 108 | */ |
| 109 | if (regexec(&assignment, line, N_MATCHES, match, 0)) |
| 110 | { fprintf(stderr, "%s: Syntax error on line %d of input file.\n", |
| 111 | prog_name, line_num); |
| 112 | exit(1); |
| 113 | } |
| 114 | |
| 115 | /* OK, we found an assignment. Break the line into substrings |
| 116 | * representing the lefthand and righthand sides of the assignment. |
| 117 | */ |
| 118 | line[match[1].rm_eo] = '\0'; |
| 119 | line[match[2].rm_eo] = '\0'; |
| 120 | name = &line[match[1].rm_so]; |
| 121 | value = &line[match[2].rm_so]; |
| 122 | |
Stefan Reinauer | f527e70 | 2008-01-18 15:33:49 +0000 | [diff] [blame] | 123 | /* now look up the coreboot parameter name */ |
Stefan Reinauer | 6540ae5 | 2007-07-12 16:35:42 +0000 | [diff] [blame] | 124 | if (is_checksum_name(name) || (e = find_cmos_entry(name)) == NULL) |
| 125 | { fprintf(stderr, "%s: Error on line %d of input file: CMOS parameter " |
| 126 | "%s not found.\n", prog_name, line_num, name); |
| 127 | exit(1); |
| 128 | } |
| 129 | |
| 130 | /* At this point, we figure out what numeric value needs to be written |
| 131 | * to which location. At the same time, we perform sanity checking on |
| 132 | * the write operation. |
| 133 | */ |
| 134 | |
| 135 | if ((item = (cmos_write_t *) malloc(sizeof(*item))) == NULL) |
| 136 | out_of_memory(); |
| 137 | |
| 138 | item->bit = e->bit; |
| 139 | item->length = e->length; |
| 140 | item->value = try_prepare_cmos_write(e, value); |
| 141 | |
| 142 | /* Append write operation to pending write list. */ |
| 143 | item->next = NULL; |
| 144 | *p = item; |
| 145 | p = &item->next; |
| 146 | } |
| 147 | |
| 148 | free_reg_exprs(2, &blank_or_comment, &assignment); |
| 149 | return list; |
| 150 | } |
| 151 | |
| 152 | /**************************************************************************** |
| 153 | * do_cmos_writes |
| 154 | * |
| 155 | * 'list' is a linked list of pending CMOS write operations that have passed |
| 156 | * all sanity checks. Perform all write operations, destroying the list as |
| 157 | * we go. |
| 158 | ****************************************************************************/ |
| 159 | void do_cmos_writes (cmos_write_t *list) |
| 160 | { cmos_write_t *item; |
| 161 | |
| 162 | set_iopl(3); |
| 163 | |
| 164 | while (list != NULL) |
| 165 | { item = list; |
| 166 | list = item->next; |
| 167 | cmos_write(item->bit, item->length, item->value); |
| 168 | free(item); |
| 169 | } |
| 170 | |
| 171 | cmos_checksum_write(cmos_checksum_compute()); |
| 172 | set_iopl(0); |
| 173 | } |
| 174 | |
| 175 | /**************************************************************************** |
| 176 | * get_input_file_line |
| 177 | * |
| 178 | * Get a line of input from file 'f'. Store result in 'line' which is an |
| 179 | * array of 'line_buf_size' bytes. Return OK on success or an error code on |
| 180 | * error. |
| 181 | ****************************************************************************/ |
| 182 | static int get_input_file_line (FILE *f, char line[], int line_buf_size) |
| 183 | { switch (get_line_from_file(f, line, line_buf_size)) |
| 184 | { case OK: |
| 185 | return OK; |
| 186 | |
| 187 | case LINE_EOF: |
| 188 | return LINE_EOF; |
| 189 | |
| 190 | case LINE_TOO_LONG: |
| 191 | fprintf(stderr, "%s: Error on line %d of input file: Maximum line " |
| 192 | "length exceeded. Max is %d characters.\n", prog_name, |
| 193 | line_num, line_buf_size - 2); |
| 194 | break; |
| 195 | |
| 196 | default: |
| 197 | BUG(); |
| 198 | } |
| 199 | |
| 200 | exit(1); |
| 201 | return 1; /* keep compiler happy */ |
| 202 | } |
| 203 | |
| 204 | /**************************************************************************** |
| 205 | * try_prepare_cmos_write |
| 206 | * |
| 207 | * Attempt to convert 'value_str' to an integer representation for storage in |
| 208 | * CMOS memory. On success, return the converted value. On error, exit with |
| 209 | * an error message. |
| 210 | ****************************************************************************/ |
| 211 | static unsigned long long try_prepare_cmos_write (const cmos_entry_t *e, |
| 212 | const char value_str[]) |
| 213 | { unsigned long long value; |
| 214 | |
| 215 | switch (prepare_cmos_write(e, value_str, &value)) |
| 216 | { case OK: |
| 217 | return value; |
| 218 | |
| 219 | case CMOS_OP_BAD_ENUM_VALUE: |
| 220 | fprintf(stderr, "%s: Error on line %d of input file: Bad value for " |
| 221 | "parameter %s.", prog_name, line_num, e->name); |
| 222 | break; |
| 223 | |
| 224 | case CMOS_OP_NEGATIVE_INT: |
| 225 | fprintf(stderr, "%s: Error on line %d of input file: This program " |
| 226 | "does not support assignment of negative numbers to " |
Stefan Reinauer | f527e70 | 2008-01-18 15:33:49 +0000 | [diff] [blame] | 227 | "coreboot parameters.", prog_name, line_num); |
Stefan Reinauer | 6540ae5 | 2007-07-12 16:35:42 +0000 | [diff] [blame] | 228 | break; |
| 229 | |
| 230 | case CMOS_OP_INVALID_INT: |
| 231 | fprintf(stderr, "%s: Error on line %d of input file: %s is not a " |
| 232 | "valid integer.", prog_name, line_num, value_str); |
| 233 | break; |
| 234 | |
| 235 | case CMOS_OP_RESERVED: |
| 236 | fprintf(stderr, "%s: Error on line %d of input file: Can not modify " |
Stefan Reinauer | f527e70 | 2008-01-18 15:33:49 +0000 | [diff] [blame] | 237 | "reserved coreboot parameter %s.", prog_name, line_num, |
Stefan Reinauer | 6540ae5 | 2007-07-12 16:35:42 +0000 | [diff] [blame] | 238 | e->name); |
| 239 | break; |
| 240 | |
| 241 | case CMOS_OP_VALUE_TOO_WIDE: |
| 242 | fprintf(stderr, "%s: Error on line %d of input file: Can not write " |
| 243 | "value %s to CMOS parameter %s that is only %d bits wide.", |
| 244 | prog_name, line_num, value_str, e->name, e->length); |
| 245 | break; |
| 246 | |
| 247 | case CMOS_OP_NO_MATCHING_ENUM: |
Stefan Reinauer | f527e70 | 2008-01-18 15:33:49 +0000 | [diff] [blame] | 248 | fprintf(stderr, "%s: coreboot parameter %s has no matching enums.", |
Stefan Reinauer | 6540ae5 | 2007-07-12 16:35:42 +0000 | [diff] [blame] | 249 | prog_name, e->name); |
| 250 | break; |
| 251 | |
| 252 | case CMOS_AREA_OUT_OF_RANGE: |
| 253 | fprintf(stderr, "%s: The CMOS area specified by the layout info for " |
Stefan Reinauer | f527e70 | 2008-01-18 15:33:49 +0000 | [diff] [blame] | 254 | "coreboot parameter %s is out of range.", prog_name, |
Stefan Reinauer | 6540ae5 | 2007-07-12 16:35:42 +0000 | [diff] [blame] | 255 | e->name); |
| 256 | break; |
| 257 | |
| 258 | case CMOS_AREA_OVERLAPS_RTC: |
| 259 | fprintf(stderr, "%s: The CMOS area specified by the layout info for " |
Stefan Reinauer | f527e70 | 2008-01-18 15:33:49 +0000 | [diff] [blame] | 260 | "coreboot parameter %s overlaps the realtime clock area.", |
Stefan Reinauer | 6540ae5 | 2007-07-12 16:35:42 +0000 | [diff] [blame] | 261 | prog_name, e->name); |
| 262 | break; |
| 263 | |
| 264 | case CMOS_AREA_TOO_WIDE: |
| 265 | fprintf(stderr, "%s: The CMOS area specified by the layout info for " |
Stefan Reinauer | f527e70 | 2008-01-18 15:33:49 +0000 | [diff] [blame] | 266 | "coreboot parameter %s is too wide.", |
Stefan Reinauer | 6540ae5 | 2007-07-12 16:35:42 +0000 | [diff] [blame] | 267 | prog_name, e->name); |
| 268 | break; |
| 269 | |
| 270 | default: |
| 271 | fprintf(stderr, |
| 272 | "%s: Unknown error encountered while attempting to modify " |
Stefan Reinauer | f527e70 | 2008-01-18 15:33:49 +0000 | [diff] [blame] | 273 | "coreboot parameter %s.", prog_name, e->name); |
Stefan Reinauer | 6540ae5 | 2007-07-12 16:35:42 +0000 | [diff] [blame] | 274 | break; |
| 275 | } |
| 276 | |
| 277 | fprintf(stderr, " No CMOS writes performed.\n"); |
| 278 | exit(1); |
| 279 | return 0; /* keep compiler happy */ |
| 280 | } |