1 /* $OpenBSD: memconfig.c,v 1.14 2011/06/06 14:59:16 tedu Exp $ */ 2 3 /*- 4 * Copyright (c) 1999 Michael Smith <msmith@freebsd.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD: /home/ncvs/src/usr.sbin/memcontrol/memcontrol.c,v 1.8 2002/09/15 15:07:55 dwmalone Exp $ 29 */ 30 31 #include <sys/types.h> 32 #include <sys/ioctl.h> 33 #include <sys/memrange.h> 34 35 #include <err.h> 36 #include <fcntl.h> 37 #include <stdio.h> 38 #include <stdlib.h> 39 #include <string.h> 40 #include <unistd.h> 41 42 struct { 43 const char *name; 44 int val; 45 int kind; 46 #define MDF_SETTABLE (1<<0) 47 } attrnames[] = { 48 {"uncacheable", MDF_UNCACHEABLE, MDF_SETTABLE}, 49 {"write-combine", MDF_WRITECOMBINE, MDF_SETTABLE}, 50 {"write-through", MDF_WRITETHROUGH, MDF_SETTABLE}, 51 {"write-back", MDF_WRITEBACK, MDF_SETTABLE}, 52 {"write-protect", MDF_WRITEPROTECT, MDF_SETTABLE}, 53 {"force", MDF_FORCE, MDF_SETTABLE}, 54 {"unknown", MDF_UNKNOWN, 0}, 55 {"fixed-base", MDF_FIXBASE, 0}, 56 {"fixed-length", MDF_FIXLEN, 0}, 57 {"set-by-firmware", MDF_FIRMWARE, 0}, 58 {"active", MDF_ACTIVE, MDF_SETTABLE}, 59 {"bogus", MDF_BOGUS, 0}, 60 {NULL, 0, 0} 61 }; 62 63 static void listfunc(int, int, char *[]); 64 static void setfunc(int, int, char *[]); 65 static void clearfunc(int, int, char *[]); 66 static void helpfunc(int, int, char *[]); 67 static void help(const char *); 68 static struct mem_range_desc *mrgetall(int, int *); 69 70 struct 71 { 72 const char *cmd; 73 const char *desc; 74 void (*func)(int, int, char *[]); 75 } functions[] = { 76 {"list", 77 "List current memory range attributes\n" 78 " list [-a]\n" 79 " -a list all range slots, even those that are inactive", 80 listfunc}, 81 {"set", 82 "Set memory range attributes\n" 83 " set -b <base> -l <length> -o <owner> <attribute>\n" 84 " <base> memory range base address\n" 85 " <length> length of memory range in bytes, power of 2\n" 86 " <owner> text identifier for this setting (7 char max)\n" 87 " <attribute> attribute(s) to be applied to this range:\n" 88 " uncacheable\n" 89 " write-combine\n" 90 " write-through\n" 91 " write-back\n" 92 " write-protect", 93 setfunc}, 94 {"clear", 95 "Clear memory range attributes\n" 96 " clear -o <owner>\n" 97 " <owner> all ranges with this owner will be cleared\n" 98 " clear -b <base> -l <length>\n" 99 " <base> memory range base address\n" 100 " <length> length of memory range in bytes, power of 2\n" 101 " Base and length must exactly match an existing range", 102 clearfunc}, 103 {NULL, NULL, helpfunc} 104 }; 105 106 int 107 main(int argc, char *argv[]) 108 { 109 int i, memfd = -1; 110 111 if (argc < 2) { 112 help(NULL); 113 } else { 114 for (i = 0; functions[i].cmd != NULL; i++) 115 if (!strcmp(argv[1], functions[i].cmd)) 116 break; 117 118 if ((functions[i].func != helpfunc) && 119 (memfd = open("/dev/mem", O_RDONLY)) == -1) 120 err(1, "can't open /dev/mem"); 121 functions[i].func(memfd, argc - 1, argv + 1); 122 close(memfd); 123 } 124 return(0); 125 } 126 127 static struct mem_range_desc * 128 mrgetall(int memfd, int *nmr) 129 { 130 struct mem_range_desc *mrd; 131 struct mem_range_op mro; 132 133 mro.mo_arg[0] = 0; 134 if (ioctl(memfd, MEMRANGE_GET, &mro)) 135 err(1, "can't size range descriptor array"); 136 137 *nmr = mro.mo_arg[0]; 138 mrd = calloc(*nmr, sizeof(struct mem_range_desc)); 139 if (mrd == NULL) 140 errx(1, "can't allocate %zu bytes for %d range descriptors", 141 *nmr * sizeof(struct mem_range_desc), *nmr); 142 143 mro.mo_arg[0] = *nmr; 144 mro.mo_desc = mrd; 145 if (ioctl(memfd, MEMRANGE_GET, &mro)) 146 err(1, "can't fetch range descriptor array"); 147 148 return(mrd); 149 } 150 151 152 static void 153 listfunc(int memfd, int argc, char *argv[]) 154 { 155 int nd, i, j, ch, showall = 0; 156 struct mem_range_desc *mrd; 157 char *owner; 158 159 owner = NULL; 160 while ((ch = getopt(argc, argv, "ao:")) != -1) 161 switch(ch) { 162 case 'a': 163 showall = 1; 164 break; 165 case 'o': 166 if (!(owner = strdup(optarg))) 167 errx(1, "out of memory"); 168 break; 169 default: 170 help("list"); 171 } 172 173 mrd = mrgetall(memfd, &nd); 174 175 for (i = 0; i < nd; i++) { 176 if (!showall && !(mrd[i].mr_flags & MDF_ACTIVE)) 177 continue; 178 if (owner && strcmp(mrd[i].mr_owner, owner)) 179 continue; 180 printf("%qx/%qx %.8s ", mrd[i].mr_base, mrd[i].mr_len, 181 mrd[i].mr_owner[0] ? mrd[i].mr_owner : "-"); 182 for (j = 0; attrnames[j].name != NULL; j++) 183 if (mrd[i].mr_flags & attrnames[j].val) 184 printf("%s ", attrnames[j].name); 185 printf("\n"); 186 } 187 free(mrd); 188 if (owner) 189 free(owner); 190 } 191 192 static void 193 setfunc(int memfd, int argc, char *argv[]) 194 { 195 struct mem_range_desc mrd; 196 struct mem_range_op mro; 197 int i, ch; 198 char *ep; 199 200 mrd.mr_base = 0; 201 mrd.mr_len = 0; 202 mrd.mr_flags = 0; 203 strlcpy(mrd.mr_owner, "user", sizeof mrd.mr_owner); 204 205 while ((ch = getopt(argc, argv, "b:l:o:")) != -1) 206 switch(ch) { 207 case 'b': 208 mrd.mr_base = strtouq(optarg, &ep, 0); 209 if ((ep == optarg) || (*ep != 0)) 210 help("set"); 211 break; 212 case 'l': 213 mrd.mr_len = strtouq(optarg, &ep, 0); 214 if ((ep == optarg) || (*ep != 0)) 215 help("set"); 216 break; 217 case 'o': 218 if (*optarg == 0 || 219 strlen(optarg) > sizeof(mrd.mr_owner)-1) 220 help("set"); 221 strlcpy(mrd.mr_owner, optarg, sizeof mrd.mr_owner); 222 break; 223 default: 224 help("set"); 225 } 226 227 if (mrd.mr_len == 0) 228 help("set"); 229 230 argc -= optind; 231 argv += optind; 232 233 while(argc--) { 234 for (i = 0; attrnames[i].name != NULL; i++) { 235 if (!strcmp(attrnames[i].name, argv[0])) { 236 if (!attrnames[i].kind & MDF_SETTABLE) 237 help("flags"); 238 mrd.mr_flags |= attrnames[i].val; 239 break; 240 } 241 } 242 if (attrnames[i].name == NULL) 243 help("flags"); 244 argv++; 245 } 246 247 mro.mo_desc = &mrd; 248 mro.mo_arg[0] = 0; 249 if (ioctl(memfd, MEMRANGE_SET, &mro)) 250 err(1, "can't set range"); 251 } 252 253 static void 254 clearfunc(int memfd, int argc, char *argv[]) 255 { 256 struct mem_range_desc mrd, *mrdp; 257 struct mem_range_op mro; 258 int i, nd, ch, got_base = 0; 259 char *ep, *owner; 260 261 mrd.mr_base = 0; 262 mrd.mr_len = 0; 263 owner = NULL; 264 while ((ch = getopt(argc, argv, "b:l:o:")) != -1) 265 switch(ch) { 266 case 'b': 267 mrd.mr_base = strtouq(optarg, &ep, 0); 268 if ((ep == optarg) || (*ep != 0)) 269 help("clear"); 270 else 271 got_base = 1; 272 break; 273 case 'l': 274 mrd.mr_len = strtouq(optarg, &ep, 0); 275 if ((ep == optarg) || (*ep != 0)) 276 help("clear"); 277 break; 278 case 'o': 279 if ((*optarg == 0) || (strlen(optarg) > 7)) 280 help("clear"); 281 if (!(owner = strdup(optarg))) 282 errx(1, "out of memory"); 283 break; 284 285 default: 286 help("clear"); 287 } 288 289 if (owner != NULL) { 290 /* clear-by-owner */ 291 if (got_base || mrd.mr_len != 0) 292 help("clear"); 293 294 mrdp = mrgetall(memfd, &nd); 295 mro.mo_arg[0] = MEMRANGE_SET_REMOVE; 296 for (i = 0; i < nd; i++) { 297 if (!strcmp(owner, mrdp[i].mr_owner) && 298 (mrdp[i].mr_flags & MDF_ACTIVE) && 299 !(mrdp[i].mr_flags & MDF_FIXACTIVE)) { 300 301 mro.mo_desc = mrdp + i; 302 if (ioctl(memfd, MEMRANGE_SET, &mro)) 303 warn("couldn't clear range owned by '%s'", 304 owner); 305 } 306 } 307 } else if (got_base && mrd.mr_len != 0) { 308 /* clear-by-base/len */ 309 mro.mo_arg[0] = MEMRANGE_SET_REMOVE; 310 mro.mo_desc = &mrd; 311 if (ioctl(memfd, MEMRANGE_SET, &mro)) 312 err(1, "couldn't clear range"); 313 } else { 314 help("clear"); 315 } 316 } 317 318 static void 319 helpfunc(int memfd, int argc, char *argv[]) 320 { 321 help(argv[1]); 322 } 323 324 static void 325 help(const char *what) 326 { 327 int i; 328 329 if (what != NULL) { 330 /* find a function that matches */ 331 for (i = 0; functions[i].cmd != NULL; i++) 332 if (!strcmp(what, functions[i].cmd)) { 333 fprintf(stderr, "%s\n", functions[i].desc); 334 return; 335 } 336 fprintf(stderr, "Unknown command '%s'\n", what); 337 } 338 339 /* print general help */ 340 fprintf(stderr, "Valid commands are :\n"); 341 for (i = 0; functions[i].cmd != NULL; i++) 342 fprintf(stderr, " %s\n", functions[i].cmd); 343 fprintf(stderr, "Use help <command> for command-specific help\n"); 344 } 345