m5.c revision 9949 
1/*
2 * Copyright (c) 2011 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder.  You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Copyright (c) 2003-2005 The Regents of The University of Michigan
15 * All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions are
19 * met: redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer;
21 * redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution;
24 * neither the name of the copyright holders nor the names of its
25 * contributors may be used to endorse or promote products derived from
26 * this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * Authors: Nathan Binkert
41 */
42
43#ifdef linux
44#define _GNU_SOURCE
45#include <sched.h>
46#endif
47
48#include <err.h>
49#include <fcntl.h>
50#include <inttypes.h>
51#include <stdio.h>
52#include <stdlib.h>
53#include <string.h>
54#include <sys/mman.h>
55#include <sys/stat.h>
56#include <sys/types.h>
57#include <unistd.h>
58
59#include "m5op.h"
60
61void *m5_mem = NULL;
62
63char *progname;
64char *command = "unspecified";
65void usage();
66
67void
68parse_int_args(int argc, char *argv[], uint64_t ints[], int len)
69{
70    if (argc > len)
71        usage();
72
73// On 32 bit platforms we need to use strtoull to do the conversion
74#ifdef __LP64__
75#define strto64 strtoul
76#else
77#define strto64 strtoull
78#endif
79    int i;
80    for (i = 0; i < len; ++i)
81        ints[i] = (i < argc) ? strto64(argv[i], NULL, 0) : 0;
82
83#undef strto64
84}
85
86int
87read_file(int dest_fid)
88{
89    char buf[256*1024];
90    int offset = 0;
91    int len;
92
93    // Touch all buffer pages to ensure they are mapped in the
94    // page table. This is required in the case of X86_FS, where
95    // Linux does demand paging.
96    memset(buf, 0, sizeof(buf));
97
98    while ((len = m5_readfile(buf, sizeof(buf), offset)) > 0) {
99        write(dest_fid, buf, len);
100        offset += len;
101    }
102}
103
104int
105write_file(const char *filename)
106{
107    fprintf(stderr, "opening %s\n", filename);
108    int src_fid = open(filename, O_RDONLY);
109
110    if (src_fid < 0) {
111        fprintf(stderr, "error opening %s\n", filename);
112        return;
113    }
114
115    char buf[256*1024];
116    int offset = 0;
117    int len;
118    int bytes = 0;
119
120    memset(buf, 0, sizeof(buf));
121
122    while ((len = read(src_fid, buf, sizeof(buf))) > 0) {
123        bytes += m5_writefile(buf, len, offset, filename);
124        offset += len;
125    }
126    fprintf(stderr, "written %d bytes\n", bytes);
127
128    close(src_fid);
129}
130
131void
132do_exit(int argc, char *argv[])
133{
134    if (argc > 1)
135        usage();
136
137    uint64_t ints[1];
138    parse_int_args(argc, argv, ints, 1);
139    m5_exit(ints[0]);
140}
141
142void
143do_fail(int argc, char *argv[])
144{
145    if (argc < 1 || argc > 2)
146        usage();
147
148    uint64_t ints[2] = {0,0};
149    parse_int_args(argc, argv, ints, argc);
150    m5_fail(ints[1], ints[0]);
151}
152
153void
154do_reset_stats(int argc, char *argv[])
155{
156    uint64_t ints[2];
157    parse_int_args(argc, argv, ints, 2);
158    m5_reset_stats(ints[0], ints[1]);
159}
160
161void
162do_dump_stats(int argc, char *argv[])
163{
164    uint64_t ints[2];
165    parse_int_args(argc, argv, ints, 2);
166    m5_dump_stats(ints[0], ints[1]);
167}
168
169void
170do_dump_reset_stats(int argc, char *argv[])
171{
172    uint64_t ints[2];
173    parse_int_args(argc, argv, ints, 2);
174    m5_dumpreset_stats(ints[0], ints[1]);
175}
176
177void
178do_read_file(int argc, char *argv[])
179{
180    if (argc > 0)
181        usage();
182
183    read_file(STDOUT_FILENO);
184}
185
186void
187do_write_file(int argc, char *argv[])
188{
189    if (argc != 1)
190        usage();
191
192    const char *filename = argv[0];
193
194    write_file(filename);
195}
196
197void
198do_exec_file(int argc, char *argv[])
199{
200    if (argc > 0)
201        usage();
202
203    const char *destname = "/tmp/execfile";
204
205    int fid = open(destname, O_WRONLY, 0777);
206    int len = read_file(fid);
207    close(fid);
208    if (len > 0) {
209        execl(destname, "execfile", NULL);
210        err(1, "execl failed!");
211    }
212}
213
214void
215do_checkpoint(int argc, char *argv[])
216{
217    uint64_t ints[2];
218    parse_int_args(argc, argv, ints, 2);
219    m5_checkpoint(ints[0], ints[1]);
220}
221
222void
223do_load_symbol(int argc, char *argv[])
224{
225    if (argc != 2)
226        usage();
227
228    uint64_t addr = strtoul(argv[0], NULL, 0);
229    char *symbol = argv[1];
230    m5_loadsymbol(addr, symbol);
231}
232
233void
234do_initparam(int argc, char *argv[])
235{
236    if (argc != 0)
237        usage();
238
239    uint64_t val = m5_initparam();
240    printf("%"PRIu64, val);
241}
242
243void
244do_sw99param(int argc, char *argv[])
245{
246    if (argc != 0)
247        usage();
248
249    uint64_t param = m5_initparam();
250
251    // run-time, rampup-time, rampdown-time, warmup-time, connections
252    printf("%"PRId64" %"PRId64" %"PRId64" %"PRId64" %"PRId64,
253           (param >> 48) & 0xfff,
254           (param >> 36) & 0xfff, (param >> 24) & 0xfff,
255           (param >> 12) & 0xfff, (param >> 0) & 0xfff);
256}
257
258#ifdef linux
259void
260do_pin(int argc, char *argv[])
261{
262    if (argc < 2)
263        usage();
264
265    cpu_set_t mask;
266    CPU_ZERO(&mask);
267
268    const char *sep = ",";
269    char *target = strtok(argv[0], sep);
270    while (target) {
271        CPU_SET(atoi(target), &mask);
272        target = strtok(NULL, sep);
273    }
274
275    if (sched_setaffinity(0, sizeof(cpu_set_t), &mask) < 0)
276        err(1, "setaffinity");
277
278    execvp(argv[1], &argv[1]);
279    err(1, "execvp failed!");
280}
281#endif
282
283struct MainFunc
284{
285    char *name;
286    void (*func)(int argc, char *argv[]);
287    char *usage;
288};
289
290struct MainFunc mainfuncs[] = {
291    { "exit",           do_exit,             "[delay]" },
292    { "fail",           do_fail,             "<code> [delay]" },
293    { "resetstats",     do_reset_stats,      "[delay [period]]" },
294    { "dumpstats",      do_dump_stats,       "[delay [period]]" },
295    { "dumpresetstats", do_dump_reset_stats, "[delay [period]]" },
296    { "readfile",       do_read_file,        "" },
297    { "writefile",      do_write_file,       "<filename>" },
298    { "execfile",       do_exec_file,        "" },
299    { "checkpoint",     do_checkpoint,       "[delay [period]]" },
300    { "loadsymbol",     do_load_symbol,      "<address> <symbol>" },
301    { "initparam",      do_initparam,        "" },
302    { "sw99param",      do_sw99param,        "" },
303#ifdef linux
304    { "pin",            do_pin,              "<cpu> <program> [args ...]" }
305#endif
306};
307int numfuncs = sizeof(mainfuncs) / sizeof(mainfuncs[0]);
308
309void
310usage()
311{
312    int i;
313
314    for (i = 0; i < numfuncs; ++i) {
315        char *header = i ? "" : "usage:";
316        fprintf(stderr, "%-6s %s %s %s\n",
317                header, progname, mainfuncs[i].name, mainfuncs[i].usage);
318    }
319    fprintf(stderr, "\n");
320    fprintf(stderr, "All times in nanoseconds!\n");
321
322    exit(1);
323}
324
325static void
326map_m5_mem()
327{
328#ifdef M5OP_ADDR
329    int fd;
330
331    fd = open("/dev/mem", O_RDWR | O_SYNC);
332    if (fd == -1) {
333        perror("Can't open /dev/mem");
334        exit(1);
335    }
336
337    m5_mem = mmap(NULL, 0x10000, PROT_READ | PROT_WRITE, MAP_SHARED, fd, M5OP_ADDR);
338    if (!m5_mem) {
339        perror("Can't mmap /dev/mem");
340        exit(1);
341    }
342#endif
343}
344
345int
346main(int argc, char *argv[])
347{
348    progname = argv[0];
349    if (argc < 2)
350        usage(1);
351
352    map_m5_mem();
353
354    command = argv[1];
355
356    argv += 2;
357    argc -= 2;
358
359    int i;
360    for (i = 0; i < numfuncs; ++i) {
361        if (strcmp(command, mainfuncs[i].name) != 0)
362            continue;
363
364        mainfuncs[i].func(argc, argv);
365        exit(0);
366    }
367
368    usage(1);
369}
370