m5.c revision 8734:79592b2b1d55 
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 <unistd.h>
55
56#include "m5op.h"
57
58char *progname;
59char *command = "unspecified";
60void usage();
61
62void
63parse_int_args(int argc, char *argv[], uint64_t ints[], int len)
64{
65    if (argc > len)
66        usage();
67
68    int i;
69    for (i = 0; i < len; ++i)
70        ints[i] = (i < argc) ? strtoul(argv[i], NULL, 0) : 0;
71}
72
73int
74read_file(int dest_fid)
75{
76    char buf[256*1024];
77    int offset = 0;
78    int len;
79
80    // Touch all buffer pages to ensure they are mapped in the
81    // page table. This is required in the case of X86_FS, where
82    // Linux does demand paging.
83    memset(buf, 0, sizeof(buf));
84
85    while ((len = m5_readfile(buf, sizeof(buf), offset)) > 0) {
86        write(dest_fid, buf, len);
87        offset += len;
88    }
89}
90
91int
92write_file(const char *filename)
93{
94    fprintf(stderr, "opening %s\n", filename);
95    int src_fid = open(filename, O_RDONLY);
96
97    if (src_fid < 0) {
98        fprintf(stderr, "error opening %s\n", filename);
99        return;
100    }
101
102    char buf[256*1024];
103    int offset = 0;
104    int len;
105    int bytes = 0;
106
107    memset(buf, 0, sizeof(buf));
108
109    while ((len = read(src_fid, buf, sizeof(buf))) > 0) {
110        bytes += m5_writefile(buf, len, offset, filename);
111        offset += len;
112    }
113    fprintf(stderr, "written %d bytes\n", bytes);
114
115    close(src_fid);
116}
117
118void
119do_exit(int argc, char *argv[])
120{
121    if (argc > 1)
122        usage();
123
124    m5_exit((argc > 0) ? strtoul(argv[0], NULL, 0) : 0);
125}
126
127void
128do_reset_stats(int argc, char *argv[])
129{
130    uint64_t ints[2];
131    parse_int_args(argc, argv, ints, 2);
132    m5_reset_stats(ints[0], ints[1]);
133}
134
135void
136do_dump_stats(int argc, char *argv[])
137{
138    uint64_t ints[2];
139    parse_int_args(argc, argv, ints, 2);
140    m5_dump_stats(ints[0], ints[1]);
141}
142
143void
144do_dump_reset_stats(int argc, char *argv[])
145{
146    uint64_t ints[2];
147    parse_int_args(argc, argv, ints, 2);
148    m5_dumpreset_stats(ints[0], ints[1]);
149}
150
151void
152do_read_file(int argc, char *argv[])
153{
154    if (argc > 0)
155        usage();
156
157    read_file(STDOUT_FILENO);
158}
159
160void
161do_write_file(int argc, char *argv[])
162{
163    if (argc != 1)
164        usage();
165
166    const char *filename = argv[0];
167
168    write_file(filename);
169}
170
171void
172do_exec_file(int argc, char *argv[])
173{
174    if (argc > 0)
175        usage();
176
177    const char *destname = "/tmp/execfile";
178
179    int fid = open(destname, O_WRONLY, 0777);
180    int len = read_file(fid);
181    close(fid);
182    if (len > 0) {
183        execl(destname, "execfile", NULL);
184        err(1, "execl failed!");
185    }
186}
187
188void
189do_checkpoint(int argc, char *argv[])
190{
191    uint64_t ints[2];
192    parse_int_args(argc, argv, ints, 2);
193    m5_checkpoint(ints[0], ints[1]);
194}
195
196void
197do_load_symbol(int argc, char *argv[])
198{
199    if (argc != 2)
200        usage();
201
202    uint64_t addr = strtoul(argv[0], NULL, 0);
203    char *symbol = argv[1];
204    m5_loadsymbol(addr, symbol);
205}
206
207void
208do_initparam(int argc, char *argv[])
209{
210    if (argc != 0)
211        usage();
212
213    uint64_t val = m5_initparam();
214    printf("%"PRIu64, val);
215}
216
217void
218do_sw99param(int argc, char *argv[])
219{
220    if (argc != 0)
221        usage();
222
223    uint64_t param = m5_initparam();
224
225    // run-time, rampup-time, rampdown-time, warmup-time, connections
226    printf("%d %d %d %d %d", (param >> 48) & 0xfff,
227           (param >> 36) & 0xfff, (param >> 24) & 0xfff,
228           (param >> 12) & 0xfff, (param >> 0) & 0xfff);
229}
230
231#ifdef linux
232void
233do_pin(int argc, char *argv[])
234{
235    if (argc < 2)
236        usage();
237
238    cpu_set_t mask;
239    CPU_ZERO(&mask);
240
241    const char *sep = ",";
242    char *target = strtok(argv[0], sep);
243    while (target) {
244        CPU_SET(atoi(target), &mask);
245        target = strtok(NULL, sep);
246    }
247
248    if (sched_setaffinity(0, sizeof(cpu_set_t), &mask) < 0)
249        err(1, "setaffinity");
250
251    execvp(argv[1], &argv[1]);
252    err(1, "execvp failed!");
253}
254#endif
255
256struct MainFunc
257{
258    char *name;
259    void (*func)(int argc, char *argv[]);
260    char *usage;
261};
262
263struct MainFunc mainfuncs[] = {
264    { "exit",           do_exit,             "[delay]" },
265    { "resetstats",     do_reset_stats,      "[delay [period]]" },
266    { "dumpstats",      do_dump_stats,       "[delay [period]]" },
267    { "dumpresetstats", do_dump_reset_stats, "[delay [period]]" },
268    { "readfile",       do_read_file,        "" },
269    { "writefile",      do_write_file,       "<filename>" },
270    { "execfile",       do_exec_file,        "" },
271    { "checkpoint",     do_checkpoint,       "[delay [period]]" },
272    { "loadsymbol",     do_load_symbol,      "<address> <symbol>" },
273    { "initparam",      do_initparam,        "" },
274    { "sw99param",      do_sw99param,        "" },
275#ifdef linux
276    { "pin",            do_pin,              "<cpu> <program> [args ...]" }
277#endif
278};
279int numfuncs = sizeof(mainfuncs) / sizeof(mainfuncs[0]);
280
281void
282usage()
283{
284    int i;
285
286    for (i = 0; i < numfuncs; ++i) {
287        char *header = i ? "" : "usage:";
288        fprintf(stderr, "%-6s %s %s %s\n",
289                header, progname, mainfuncs[i].name, mainfuncs[i].usage);
290    }
291    fprintf(stderr, "\n");
292    fprintf(stderr, "All times in nanoseconds!\n");
293
294    exit(1);
295}
296
297int
298main(int argc, char *argv[])
299{
300    progname = argv[0];
301    if (argc < 2)
302        usage(1);
303
304    command = argv[1];
305
306    argv += 2;
307    argc -= 2;
308
309    int i;
310    for (i = 0; i < numfuncs; ++i) {
311        if (strcmp(command, mainfuncs[i].name) != 0)
312            continue;
313
314        mainfuncs[i].func(argc, argv);
315        exit(0);
316    }
317
318    usage(1);
319}
320