common/cmd_cpu.c

   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
   8 #include <common.h>
   9 #include <command.h>
  10 #include <cpu.h>
  11 #include <dm.h>
  12
  13 static const char *cpu_feature_name[CPU_FEAT_COUNT] = {
  14         "L1 cache",
  15         "MMU",
  16 };
  17
  18 static int print_cpu_list(bool detail)
  19 {
  20         struct udevice *dev;
  21         struct uclass *uc;
  22         char buf[100];
  23         int ret;
  24
  25         ret = uclass_get(UCLASS_CPU, &uc);
  26         if (ret) {
  27                 printf("Cannot find CPU uclass\n");
  28                 return ret;
  29         }
  30         uclass_foreach_dev(dev, uc) {
  31                 struct cpu_platdata *plat = dev_get_parent_platdata(dev);
  32                 struct cpu_info info;
  33                 bool first;
  34                 int i;
  35
  36                 ret = cpu_get_desc(dev, buf, sizeof(buf));
  37                 printf("%3d: %-10s %s\n", dev->seq, dev->name,
  38                        ret ? "<no description>" : buf);
  39                 if (!detail)
  40                         continue;
  41                 ret = cpu_get_info(dev, &info);
  42                 if (ret) {
  43                         printf("\t(no detail available");
  44                         if (ret != -ENOSYS)
  45                                 printf(": err=%d\n", ret);
  46                         printf(")\n");
  47                         continue;
  48                 }
  49                 printf("\tID = %d, freq = ", plat->cpu_id);
  50                 print_freq(info.cpu_freq, "");
  51                 first = true;
  52                 for (i = 0; i < CPU_FEAT_COUNT; i++) {
  53                         if (info.features & (1 << i)) {
  54                                 printf("%s%s", first ? ": " : ", ",
  55                                        cpu_feature_name[i]);
  56                                 first = false;
  57                         }
  58                 }
  59                 printf("\n");
  60         }
  61
  62         return 0;
  63 }
  64
  65 static int do_cpu_list(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
  66 {
  67         if (print_cpu_list(false))
  68                 return CMD_RET_FAILURE;
  69
  70         return 0;
  71 }
  72
  73 static int do_cpu_detail(cmd_tbl_t *cmdtp, int flag, int argc,
  74                          char *const argv[])
  75 {
  76         if (print_cpu_list(true))
  77                 return CMD_RET_FAILURE;
  78
  79         return 0;
  80 }
  81
  82 static cmd_tbl_t cmd_cpu_sub[] = {
  83         U_BOOT_CMD_MKENT(list, 2, 1, do_cpu_list, "", ""),
  84         U_BOOT_CMD_MKENT(detail, 4, 0, do_cpu_detail, "", ""),
  85 };
  86
  87 /*
  88  * Process a cpu sub-command
  89  */
  90 static int do_cpu(cmd_tbl_t *cmdtp, int flag, int argc,
  91                        char * const argv[])
  92 {
  93         cmd_tbl_t *c = NULL;
  94
  95         /* Strip off leading 'cpu' command argument */
  96         argc--;
  97         argv++;
  98
  99         if (argc)
 100                 c = find_cmd_tbl(argv[0], cmd_cpu_sub, ARRAY_SIZE(cmd_cpu_sub));
 101
 102         if (c)
 103                 return c->cmd(cmdtp, flag, argc, argv);
 104         else
 105                 return CMD_RET_USAGE;
 106 }
 107
 108 U_BOOT_CMD(
 109         cpu, 2, 1, do_cpu,
 110         "display information about CPUs",
 111         "list   - list available CPUs\n"
 112         "cpu detail     - show CPU detail"
 113 );