cmd/misc.c

   1 /*
   2  * (C) Copyright 2001
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 /*
   9  * Misc functions
  10  */
  11 #include <common.h>
  12 #include <command.h>
  13 #include <console.h>
  14
  15 static int do_sleep(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  16 {
  17         ulong start = get_timer(0);
  18         ulong mdelay = 0;
  19         ulong delay;
  20         char *frpart;
  21
  22         if (argc != 2)
  23                 return CMD_RET_USAGE;
  24
  25         delay = simple_strtoul(argv[1], NULL, 10) * CONFIG_SYS_HZ;
  26
  27         frpart = strchr(argv[1], '.');
  28
  29         if (frpart) {
  30                 uint mult = CONFIG_SYS_HZ / 10;
  31                 for (frpart++; *frpart != '\0' && mult > 0; frpart++) {
  32                         if (*frpart < '0' || *frpart > '9') {
  33                                 mdelay = 0;
  34                                 break;
  35                         }
  36                         mdelay += (*frpart - '0') * mult;
  37                         mult /= 10;
  38                 }
  39         }
  40
  41         delay += mdelay;
  42
  43         while (get_timer(start) < delay) {
  44                 if (ctrlc())
  45                         return (-1);
  46
  47                 udelay(100);
  48         }
  49
  50         return 0;
  51 }
  52
  53 U_BOOT_CMD(
  54         sleep ,    2,    1,     do_sleep,
  55         "delay execution for some time",
  56         "N\n"
  57         "    - delay execution for N seconds (N is _decimal_ and can be\n"
  58         "      fractional)"
  59 );
  60
  61 #ifdef CONFIG_CMD_TIMER
  62 static int do_timer(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  63 {
  64         static ulong start;
  65
  66         if (argc != 2)
  67                 return CMD_RET_USAGE;
  68
  69         if (!strcmp(argv[1], "start"))
  70                 start = get_timer(0);
  71
  72         if (!strcmp(argv[1], "get")) {
  73                 ulong msecs = get_timer(start) * 1000 / CONFIG_SYS_HZ;
  74                 printf("%ld.%03d\n", msecs / 1000, (int)(msecs % 1000));
  75         }
  76
  77         return 0;
  78 }
  79
  80 U_BOOT_CMD(
  81         timer,    2,    1,     do_timer,
  82         "access the system timer",
  83         "start - Reset the timer reference.\n"
  84         "timer get   - Print the time since 'start'."
  85 );
  86 #endif