LXR uboot/cmd/cpu.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Copyright (c) 2015 Google, Inc
   4 * Written by Simon Glass <sjg@chromium.org>
   5 * Copyright (c) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
   6 */
   7
   8#include <common.h>
   9#include <command.h>
  10#include <cpu.h>
  11#include <dm.h>
  12#include <errno.h>
  13
  14static const char *cpu_feature_name[CPU_FEAT_COUNT] = {
  15        "L1 cache",
  16        "MMU",
  17        "Microcode",
  18        "Device ID",
  19};
  20
  21static int print_cpu_list(bool detail)
  22{
  23        struct udevice *dev;
  24        char buf[100];
  25
  26        for (uclass_first_device(UCLASS_CPU, &dev);
  27                     dev;
  28                     uclass_next_device(&dev)) {
  29                struct cpu_plat *plat = dev_get_parent_plat(dev);
  30                struct cpu_info info;
  31                bool first = true;
  32                int ret, i;
  33
  34                ret = cpu_get_desc(dev, buf, sizeof(buf));
  35                printf("%3d: %-10s %s\n", dev_seq(dev), dev->name,
  36                       ret ? "<no description>" : buf);
  37                if (!detail)
  38                        continue;
  39                ret = cpu_get_info(dev, &info);
  40                if (ret) {
  41                        printf("\t(no detail available");
  42                        if (ret != -ENOSYS)
  43                                printf(": err=%d", ret);
  44                        printf(")\n");
  45                        continue;
  46                }
  47                printf("\tID = %d, freq = ", plat->cpu_id);
  48                print_freq(info.cpu_freq, "");
  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                if (info.features & (1 << CPU_FEAT_DEVICE_ID))
  61                        printf("\tDevice ID %#lx\n", plat->device_id);
  62        }
  63
  64        return 0;
  65}
  66
  67static int do_cpu_list(struct cmd_tbl *cmdtp, int flag, int argc,
  68                       char *const argv[])
  69{
  70        if (print_cpu_list(false))
  71                return CMD_RET_FAILURE;
  72
  73        return 0;
  74}
  75
  76static int do_cpu_detail(struct cmd_tbl *cmdtp, int flag, int argc,
  77                         char *const argv[])
  78{
  79        if (print_cpu_list(true))
  80                return CMD_RET_FAILURE;
  81
  82        return 0;
  83}
  84
  85static struct cmd_tbl cmd_cpu_sub[] = {
  86        U_BOOT_CMD_MKENT(list, 2, 1, do_cpu_list, "", ""),
  87        U_BOOT_CMD_MKENT(detail, 4, 0, do_cpu_detail, "", ""),
  88};
  89
  90/*
  91 * Process a cpu sub-command
  92 */
  93static int do_cpu(struct cmd_tbl *cmdtp, int flag, int argc,
  94                  char *const argv[])
  95{
  96        struct cmd_tbl *c = NULL;
  97
  98        /* Strip off leading 'cpu' command argument */
  99        argc--;
 100        argv++;
 101
 102        if (argc)
 103                c = find_cmd_tbl(argv[0], cmd_cpu_sub,
 104                                 ARRAY_SIZE(cmd_cpu_sub));
 105
 106        if (c)
 107                return c->cmd(cmdtp, flag, argc, argv);
 108        else
 109                return CMD_RET_USAGE;
 110}
 111
 112U_BOOT_CMD(
 113        cpu, 2, 1, do_cpu,
 114        "display information about CPUs",
 115        "list   - list available CPUs\n"
 116        "cpu detail     - show CPU detail"
 117);
 118