cpu.c 2.4 KB

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  1. /*
  2. * Copyright (c) 2015 Google, Inc
  3. * Written by Simon Glass <sjg@chromium.org>
  4. *
  5. * SPDX-License-Identifier: GPL-2.0+
  6. */
  7. #include <common.h>
  8. #include <command.h>
  9. #include <cpu.h>
  10. #include <dm.h>
  11. #include <errno.h>
  12. static const char *cpu_feature_name[CPU_FEAT_COUNT] = {
  13. "L1 cache",
  14. "MMU",
  15. "Microcode",
  16. };
  17. static int print_cpu_list(bool detail)
  18. {
  19. struct udevice *dev;
  20. struct uclass *uc;
  21. char buf[100];
  22. int ret;
  23. ret = uclass_get(UCLASS_CPU, &uc);
  24. if (ret) {
  25. printf("Cannot find CPU uclass\n");
  26. return ret;
  27. }
  28. uclass_foreach_dev(dev, uc) {
  29. struct cpu_platdata *plat = dev_get_parent_platdata(dev);
  30. struct cpu_info info;
  31. bool first;
  32. int i;
  33. ret = cpu_get_desc(dev, buf, sizeof(buf));
  34. printf("%3d: %-10s %s\n", dev->seq, dev->name,
  35. ret ? "<no description>" : buf);
  36. if (!detail)
  37. continue;
  38. ret = cpu_get_info(dev, &info);
  39. if (ret) {
  40. printf("\t(no detail available");
  41. if (ret != -ENOSYS)
  42. printf(": err=%d\n", ret);
  43. printf(")\n");
  44. continue;
  45. }
  46. printf("\tID = %d, freq = ", plat->cpu_id);
  47. print_freq(info.cpu_freq, "");
  48. first = true;
  49. for (i = 0; i < CPU_FEAT_COUNT; i++) {
  50. if (info.features & (1 << i)) {
  51. printf("%s%s", first ? ": " : ", ",
  52. cpu_feature_name[i]);
  53. first = false;
  54. }
  55. }
  56. printf("\n");
  57. if (info.features & (1 << CPU_FEAT_UCODE)) {
  58. printf("\tMicrocode version %#x\n",
  59. plat->ucode_version);
  60. }
  61. if (info.features & (1 << CPU_FEAT_DEVICE_ID))
  62. printf("\tDevice ID %#lx\n", plat->device_id);
  63. }
  64. return 0;
  65. }
  66. static int do_cpu_list(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
  67. {
  68. if (print_cpu_list(false))
  69. return CMD_RET_FAILURE;
  70. return 0;
  71. }
  72. static int do_cpu_detail(cmd_tbl_t *cmdtp, int flag, int argc,
  73. char *const argv[])
  74. {
  75. if (print_cpu_list(true))
  76. return CMD_RET_FAILURE;
  77. return 0;
  78. }
  79. static cmd_tbl_t cmd_cpu_sub[] = {
  80. U_BOOT_CMD_MKENT(list, 2, 1, do_cpu_list, "", ""),
  81. U_BOOT_CMD_MKENT(detail, 4, 0, do_cpu_detail, "", ""),
  82. };
  83. /*
  84. * Process a cpu sub-command
  85. */
  86. static int do_cpu(cmd_tbl_t *cmdtp, int flag, int argc,
  87. char * const argv[])
  88. {
  89. cmd_tbl_t *c = NULL;
  90. /* Strip off leading 'cpu' command argument */
  91. argc--;
  92. argv++;
  93. if (argc)
  94. c = find_cmd_tbl(argv[0], cmd_cpu_sub, ARRAY_SIZE(cmd_cpu_sub));
  95. if (c)
  96. return c->cmd(cmdtp, flag, argc, argv);
  97. else
  98. return CMD_RET_USAGE;
  99. }
  100. U_BOOT_CMD(
  101. cpu, 2, 1, do_cpu,
  102. "display information about CPUs",
  103. "list - list available CPUs\n"
  104. "cpu detail - show CPU detail"
  105. );