LXR uboot/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
  15static 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
  53U_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
  62static 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
  80U_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
  87