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