2 * This file is part of msrtool.
4 * Copyright (c) 2008 Peter Stuge <peter@stuge.se>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
24 #include <sys/types.h>
33 static uint8_t cpu = DEFAULT_CPU;
35 uint8_t targets_found = 0;
36 const struct targetdef **targets = NULL;
37 const struct sysdef *sys = NULL;
38 uint8_t reserved = 0, verbose = 0, quiet = 0;
40 struct pci_access *pacc = NULL;
42 static struct targetdef alltargets[] = {
43 { "geodegx2", "AMD Geode(tm) GX2", geodegx2_probe, geodegx2_msrs },
44 { "geodelx", "AMD Geode(tm) LX", geodelx_probe, geodelx_msrs },
45 { "cs5536", "AMD Geode(tm) CS5536", cs5536_probe, cs5536_msrs },
46 { "K8", "AMD K8 Family", k8_probe, k8_msrs },
50 static struct sysdef allsystems[] = {
51 { "linux", "Linux with /dev/cpu/*/msr", linux_probe, linux_open, linux_close, linux_rdmsr },
52 { "darwin", "Mac OS X with DirectHW", darwin_probe, darwin_open, darwin_close, darwin_rdmsr },
53 { "freebsd", "FreeBSD with /dev/cpuctl*", freebsd_probe, freebsd_open, freebsd_close, freebsd_rdmsr },
57 static void syntax(char *argv[]) {
58 printf("syntax: %s [-hvqrkl] [-c cpu] [-m system] [-t target ...]\n", argv[0]);
59 printf("\t [-i addr=hi[:]lo] | [-s file] | [-d [:]file] | addr...\n");
60 printf(" -h\t show this help text\n");
61 printf(" -v\t be verbose\n");
62 printf(" -q\t be quiet (overrides -v)\n");
63 printf(" -r\t include [Reserved] values\n");
64 printf(" -k\t list all known systems and targets\n");
65 printf(" -l\t list MSRs and bit fields for current target(s) (-kl for ALL targets!)\n");
66 printf(" -c\t access MSRs on the specified CPU, default=%d\n", DEFAULT_CPU);
67 printf(" -m\t force a system, e.g: -m linux\n");
68 printf(" -t\t force a target, can be used multiple times, e.g: -t geodelx -t cs5536\n");
69 printf(" -i\t immediate mode\n");
70 printf("\t decode hex addr=hi:lo for the target without reading hw value\n");
71 printf("\t e.g: -i 4c00000f=f2f100ff56960004\n");
72 printf(" -s\t stream mode\n");
73 printf("\t read one MSR address per line and append current hw value to the line\n");
74 printf("\t use the filename - for stdin/stdout\n");
75 printf("\t using -l -s ignores input and will output all MSRs with values\n");
76 printf(" -d\t diff mode\n");
77 printf("\t read one address and value per line and compare with current hw value,\n");
78 printf("\t printing differences to stdout. use the filename - to read from stdin\n");
79 printf("\t use :file or :- to reverse diff, normally hw values are considered new\n");
80 printf(" addr.. direct mode, read and decode values for the given MSR address(es)\n");
83 static void *add_target(const struct targetdef *t) {
85 tmp = realloc(targets, (targets_found + 2) * sizeof(struct targetdef *));
91 targets[targets_found++] = t;
92 targets[targets_found] = NULL;
96 static int found_system() {
97 if (!sys || (sys && !sys->name)) {
98 fprintf(stderr, "Unable to detect the current operating system!\n");
99 fprintf(stderr, "On Linux, please run 'modprobe msr' and try again.\n");
100 fprintf(stderr, "Please send a report or patch to coreboot@coreboot.org. Thanks for your help!\n");
101 fprintf(stderr, "\n");
103 return (sys && sys->name);
106 int do_stream(const char *streamfn, uint8_t ignoreinput) {
107 char tmpfn[20], line[256];
112 FILE *fin = NULL, *fout = NULL;
113 uint32_t addr, linenum;
114 struct msr m = MSR1(0);
116 if (0 == strcmp(streamfn, "-")) {
121 if (NULL == (fin = fopen(streamfn, "r"))) {
125 if (snprintf(tmpfn, sizeof(tmpfn), "msrtoolXXXXXX") >= sizeof(tmpfn)) {
129 if (-1 == (fdout = mkstemp(tmpfn))) {
133 if (NULL == (fout = fdopen(fdout, "w"))) {
138 if (NULL == (fout = fopen(streamfn, "w"))) {
147 if (!sys->open(cpu, SYS_RDONLY))
150 for (tn = 0; tn < targets_found; tn++)
151 if (dumpmsrdefsvals(fout, targets[tn], cpu)) {
156 for (linenum = 1; NULL != fgets(line, sizeof(line), fin); ++linenum) {
157 start = (0 == strncmp("0x", line, 2)) ? 2 : 0;
158 if (1 == sscanf(line + start, "%8x", &addr)) {
159 if (!sys->rdmsr(cpu, addr, &m))
161 fprintf(fout, "0x%08x 0x%08x%08x\n", addr, m.hi, m.lo);
165 fprintf(fout, "%s", line);
167 if (NULL != strchr("\r\n", line[len - 1]))
169 if (NULL == fgets(line, sizeof(line), fin))
175 fprintf(stderr, "%s:%d: fgets: %s\n", streamfn, linenum, strerror(errno));
182 if (strcmp(streamfn, "-")) {
185 else if (!ignoreinput)
186 rename(tmpfn, streamfn);
194 int do_diff(const char *difffn) {
195 char tmpfn[20], line[512], *m1start, *m2start;
197 int ret = 1, tmp, m1pos, sys_opened = 0;
198 FILE *fin = NULL, *fout = stdout;
200 uint32_t addr, linenum;
201 struct msr m1 = MSR1(0), m2 = MSR1(0);
203 if (':' == difffn[0]) {
207 if (0 == strcmp(difffn, "-"))
209 else if (NULL == (fin = fopen(difffn, "r"))) {
214 for (linenum = 1; NULL != fgets(line, sizeof(line), fin); ++linenum) {
215 tmp = strncmp("0x", line, 2) ? 0 : 2;
216 if (sscanf(line + tmp, "%8x %n%*x", &addr, &m1pos) < 1)
218 m1start = line + tmp + m1pos;
219 for (len = strlen(m1start) - 1; NULL != strchr("\r\n", m1start[len]); --len)
221 if (!str2msr(m1start, &m1, &m2start)) {
222 fprintf(stderr, "%s:%d: invalid MSR1 value '%s'\n", difffn, linenum, m1start);
225 while (' ' == *m2start)
227 if (!str2msr(m2start, &m2, NULL)) {
228 fprintf(stderr, "%s:%d: invalid MSR2 value '%s' - reading from hardware!\n", difffn, linenum, m2start);
232 sys_opened = sys->open(cpu, SYS_RDONLY);
236 if (!sys->rdmsr(cpu, addr, &m2))
239 if (diff_msr(fout, addr, rev ? m2 : m1, rev ? m1 : m2))
243 fprintf(stderr, "%s:%d: fgets: %s\n", difffn, linenum, strerror(errno));
249 if (strcmp(difffn, "-")) {
253 rename(tmpfn, difffn);
260 int main(int argc, char *argv[]) {
263 const struct sysdef *s;
264 const struct targetdef *t;
265 uint8_t tn, listmsrs = 0, listknown = 0, input = 0;
267 const char *streamfn = NULL, *difffn = NULL;
268 struct msr msrval = MSR2(-1, -1);
269 while ((c = getopt(argc, argv, "hqvrklc:m:t:a:i:s:d:")) != -1)
293 for (s = allsystems; !SYSTEM_ISEOT(*s); s++)
294 if (!strcmp(s->name, optarg)) {
300 for (t = alltargets; !TARGET_ISEOT(*t); t++)
301 if (!strcmp(t->name, optarg)) {
308 addr = msraddrbyname(optarg);
309 optarg = strchr(optarg, '=');
310 if (NULL == optarg) {
311 fprintf(stderr, "missing value in -i argument!\n");
314 if (!str2msr(++optarg, &msrval, NULL))
315 fprintf(stderr, "invalid value in -i argument!\n");
327 printf_quiet("msrtool %s\n", VERSION);
331 fprintf(stderr, "Could not initialize PCI library! pci_alloc() failed.\n");
337 if (!sys && !input && !listknown)
338 for (sys = allsystems; !SYSTEM_ISEOT(*sys); sys++) {
339 printf_verbose("Probing for system %s: %s\n", sys->name, sys->prettyname);
340 if (!sys->probe(sys))
342 printf_quiet("Detected system %s: %s\n", sys->name, sys->prettyname);
347 for (tn = 0; tn < targets_found; tn++)
348 printf_quiet("Forced target %s: %s\n", targets[tn]->name, targets[tn]->prettyname);
350 for (t = alltargets; !TARGET_ISEOT(*t); t++) {
351 printf_verbose("Probing for target %s: %s\n", t->name, t->prettyname);
354 printf_quiet("Detected target %s: %s\n", t->name, t->prettyname);
362 printf("Known systems:\n");
363 for (s = allsystems; s->name; s++)
364 printf("%s: %s\n", s->name, s->prettyname);
365 printf("\nKnown targets:\n");
366 for (t = alltargets; t->name; t++) {
367 if (listmsrs && alltargets != t)
369 printf("%s: %s\n", t->name, t->prettyname);
377 if (!targets_found || !targets) {
378 fprintf(stderr, "Unable to detect a known target; can not decode any MSRs! (Use -t to force)\n");
379 fprintf(stderr, "Please send a report or patch to coreboot@coreboot.org. Thanks for your help!\n");
380 fprintf(stderr, "\n");
385 decodemsr(cpu, addr, msrval);
391 return do_stream(streamfn, 1);
392 for (tn = 0; tn < targets_found; tn++) {
395 dumpmsrdefs(targets[tn]);
402 return do_stream(streamfn, 0);
405 ret = do_diff(difffn);
409 if (optind == argc) {
411 printf("\nNo mode or address(es) specified!\n");
417 if (!sys->open(cpu, SYS_RDONLY))
420 for (; optind < argc; optind++) {
421 addr = msraddrbyname(argv[optind]);
422 if (!sys->rdmsr(cpu, addr, &msrval))
424 decodemsr(cpu, addr, msrval);