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(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])11 static int do_dhry(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
12 {
13 ulong start, duration, vax_mips;
14 u64 dhry_per_sec;
15 int iterations = 1000000;
16
17 if (argc > 1)
18 iterations = simple_strtoul(argv[1], NULL, 10);
19
20 start = get_timer(0);
21 dhry(iterations);
22 duration = get_timer(start);
23 dhry_per_sec = lldiv(iterations * 1000ULL, duration);
24 vax_mips = lldiv(dhry_per_sec, 1757);
25 printf("%d iterations in %lu ms: %lu/s, %lu DMIPS\n", iterations,
26 duration, (ulong)dhry_per_sec, vax_mips);
27
28 return 0;
29 }
30
31 U_BOOT_CMD(
32 dhry, 2, 1, do_dhry,
33 "[iterations] - run dhrystone benchmark",
34 "\n - run the Dhrystone 2.1 benchmark, a rough measure of CPU speed\n"
35 );
36