1 /*
2 * Copyright (c) 2014 Travis Geiselbrecht
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining
5 * a copy of this software and associated documentation files
6 * (the "Software"), to deal in the Software without restriction,
7 * including without limitation the rights to use, copy, modify, merge,
8 * publish, distribute, sublicense, and/or sell copies of the Software,
9 * and to permit persons to whom the Software is furnished to do so,
10 * subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
18 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
19 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
20 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
21 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22 */
23 #if ARM_WITH_CACHE
24
25 #include <stdbool.h>
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <string.h>
29 #include <arch.h>
30 #include <arch/ops.h>
31 #include <lib/console.h>
32 #include <platform.h>
33
bench_cache(size_t bufsize,uint8_t * buf)34 static void bench_cache(size_t bufsize, uint8_t *buf)
35 {
36 lk_bigtime_t t;
37 bool do_free;
38
39 if (buf == 0) {
40 buf = memalign(PAGE_SIZE, bufsize);
41 do_free = true;
42 } else {
43 do_free = false;
44 }
45
46 printf("buf %p, size %zu\n", buf, bufsize);
47
48 if (!buf)
49 return;
50
51 t = current_time_hires();
52 arch_clean_cache_range((addr_t)buf, bufsize);
53 t = current_time_hires() - t;
54
55 printf("took %llu usecs to clean %d bytes (cold)\n", t, bufsize);
56
57 memset(buf, 0x99, bufsize);
58
59 t = current_time_hires();
60 arch_clean_cache_range((addr_t)buf, bufsize);
61 t = current_time_hires() - t;
62
63 if (do_free)
64 free(buf);
65
66 printf("took %llu usecs to clean %d bytes (hot)\n", t, bufsize);
67 }
68
cache_tests(int argc,const cmd_args * argv)69 static int cache_tests(int argc, const cmd_args *argv)
70 {
71 uint8_t *buf;
72 buf = (uint8_t *)((argc > 1) ? argv[1].u : 0UL);
73
74 printf("testing cache\n");
75
76 bench_cache(2*1024, buf);
77 bench_cache(64*1024, buf);
78 bench_cache(256*1024, buf);
79 bench_cache(1*1024*1024, buf);
80 bench_cache(8*1024*1024, buf);
81 return 0;
82 }
83
84 STATIC_COMMAND_START
85 STATIC_COMMAND("cache_tests", "test/bench the cpu cache", &cache_tests)
86 STATIC_COMMAND_END(cache_tests);
87
88 #endif
89