1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2015 Google, Inc
4 */
5
6 #include <common.h>
7 #include <command.h>
8 #include <div64.h>
9 #include "dhry.h"
10
do_dhry(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])11 static int do_dhry(struct cmd_tbl *cmdtp, int flag, int argc,
12 char *const argv[])
13 {
14 ulong start, duration, vax_mips;
15 u64 dhry_per_sec;
16 int iterations = 1000000;
17
18 if (argc > 1)
19 iterations = simple_strtoul(argv[1], NULL, 10);
20
21 start = get_timer(0);
22 dhry(iterations);
23 duration = get_timer(start);
24 dhry_per_sec = lldiv(iterations * 1000ULL, duration);
25 vax_mips = lldiv(dhry_per_sec, 1757);
26 printf("%d iterations in %lu ms: %lu/s, %lu DMIPS\n", iterations,
27 duration, (ulong)dhry_per_sec, vax_mips);
28
29 return 0;
30 }
31
32 U_BOOT_CMD(
33 dhry, 2, 1, do_dhry,
34 "[iterations] - run dhrystone benchmark",
35 "\n - run the Dhrystone 2.1 benchmark, a rough measure of CPU speed\n"
36 );
37