misc.c 1.6 KB

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