git.sur5r.net Git - u-boot/blob - 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 #include <errno.h>
  13
  14 static const char *cpu_feature_name[CPU_FEAT_COUNT] = {
  15         "L1 cache",
  16         "MMU",
  17         "Microcode",
  18         "Device ID",
  19 };
  20
  21 static int print_cpu_list(bool detail)
  22 {
  23         struct udevice *dev;
  24         struct uclass *uc;
  25         char buf[100];
  26         int ret;
  27
  28         ret = uclass_get(UCLASS_CPU, &uc);
  29         if (ret) {
  30                 printf("Cannot find CPU uclass\n");
  31                 return ret;
  32         }
  33         uclass_foreach_dev(dev, uc) {
  34                 struct cpu_platdata *plat = dev_get_parent_platdata(dev);
  35                 struct cpu_info info;
  36                 bool first;
  37                 int i;
  38
  39                 ret = cpu_get_desc(dev, buf, sizeof(buf));
  40                 printf("%3d: %-10s %s\n", dev->seq, dev->name,
  41                        ret ? "<no description>" : buf);
  42                 if (!detail)
  43                         continue;
  44                 ret = cpu_get_info(dev, &info);
  45                 if (ret) {
  46                         printf("\t(no detail available");
  47                         if (ret != -ENOSYS)
  48                                 printf(": err=%d\n", ret);
  49                         printf(")\n");
  50                         continue;
  51                 }
  52                 printf("\tID = %d, freq = ", plat->cpu_id);
  53                 print_freq(info.cpu_freq, "");
  54                 first = true;
  55                 for (i = 0; i < CPU_FEAT_COUNT; i++) {
  56                         if (info.features & (1 << i)) {
  57                                 printf("%s%s", first ? ": " : ", ",
  58                                        cpu_feature_name[i]);
  59                                 first = false;
  60                         }
  61                 }
  62                 printf("\n");
  63                 if (info.features & (1 << CPU_FEAT_UCODE)) {
  64                         printf("\tMicrocode version %#x\n",
  65                                plat->ucode_version);
  66                 }
  67                 if (info.features & (1 << CPU_FEAT_DEVICE_ID))
  68                         printf("\tDevice ID %#lx\n", plat->device_id);
  69         }
  70
  71         return 0;
  72 }
  73
  74 static int do_cpu_list(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
  75 {
  76         if (print_cpu_list(false))
  77                 return CMD_RET_FAILURE;
  78
  79         return 0;
  80 }
  81
  82 static int do_cpu_detail(cmd_tbl_t *cmdtp, int flag, int argc,
  83                          char *const argv[])
  84 {
  85         if (print_cpu_list(true))
  86                 return CMD_RET_FAILURE;
  87
  88         return 0;
  89 }
  90
  91 static cmd_tbl_t cmd_cpu_sub[] = {
  92         U_BOOT_CMD_MKENT(list, 2, 1, do_cpu_list, "", ""),
  93         U_BOOT_CMD_MKENT(detail, 4, 0, do_cpu_detail, "", ""),
  94 };
  95
  96 /*
  97  * Process a cpu sub-command
  98  */
  99 static int do_cpu(cmd_tbl_t *cmdtp, int flag, int argc,
 100                        char * const argv[])
 101 {
 102         cmd_tbl_t *c = NULL;
 103
 104         /* Strip off leading 'cpu' command argument */
 105         argc--;
 106         argv++;
 107
 108         if (argc)
 109                 c = find_cmd_tbl(argv[0], cmd_cpu_sub, ARRAY_SIZE(cmd_cpu_sub));
 110
 111         if (c)
 112                 return c->cmd(cmdtp, flag, argc, argv);
 113         else
 114                 return CMD_RET_USAGE;
 115 }
 116
 117 U_BOOT_CMD(
 118         cpu, 2, 1, do_cpu,
 119         "display information about CPUs",
 120         "list   - list available CPUs\n"
 121         "cpu detail     - show CPU detail"
 122 );