LXR uboot/cmd/cpu.c

   1/*
   2 * Copyright (c) 2015 Google, Inc
   3 * Written by Simon Glass <sjg@chromium.org>
   4 * Copyright (c) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
   5 *
   6 * SPDX-License-Identifier:     GPL-2.0+
   7 */
   8
   9#include <common.h>
  10#include <command.h>
  11#include <cpu.h>
  12#include <dm.h>
  13#include <errno.h>
  14
  15static const char *cpu_feature_name[CPU_FEAT_COUNT] = {
  16        "L1 cache",
  17        "MMU",
  18        "Microcode",
  19        "Device ID",
  20};
  21
  22static int print_cpu_list(bool detail)
  23{
  24        struct udevice *dev;
  25        char buf[100];
  26
  27        for (uclass_first_device(UCLASS_CPU, &dev);
  28                     dev;
  29                     uclass_next_device(&dev)) {
  30                struct cpu_platdata *plat = dev_get_parent_platdata(dev);
  31                struct cpu_info info;
  32                bool first = true;
  33                int ret, i;
  34
  35                ret = cpu_get_desc(dev, buf, sizeof(buf));
  36                printf("%3d: %-10s %s\n", dev->seq, dev->name,
  37                       ret ? "<no description>" : buf);
  38                if (!detail)
  39                        continue;
  40                ret = cpu_get_info(dev, &info);
  41                if (ret) {
  42                        printf("\t(no detail available");
  43                        if (ret != -ENOSYS)
  44                                printf(": err=%d", ret);
  45                        printf(")\n");
  46                        continue;
  47                }
  48                printf("\tID = %d, freq = ", plat->cpu_id);
  49                print_freq(info.cpu_freq, "");
  50                for (i = 0; i < CPU_FEAT_COUNT; i++) {
  51                        if (info.features & (1 << i)) {
  52                                printf("%s%s", first ? ": " : ", ",
  53                                       cpu_feature_name[i]);
  54                                first = false;
  55                        }
  56                }
  57                printf("\n");
  58                if (info.features & (1 << CPU_FEAT_UCODE))
  59                        printf("\tMicrocode version %#x\n",
  60                               plat->ucode_version);
  61                if (info.features & (1 << CPU_FEAT_DEVICE_ID))
  62                        printf("\tDevice ID %#lx\n", plat->device_id);
  63        }
  64
  65        return 0;
  66}
  67
  68static int do_cpu_list(cmd_tbl_t *cmdtp, int flag, int argc,
  69                       char *const argv[])
  70{
  71        if (print_cpu_list(false))
  72                return CMD_RET_FAILURE;
  73
  74        return 0;
  75}
  76
  77static int do_cpu_detail(cmd_tbl_t *cmdtp, int flag, int argc,
  78                         char *const argv[])
  79{
  80        if (print_cpu_list(true))
  81                return CMD_RET_FAILURE;
  82
  83        return 0;
  84}
  85
  86static cmd_tbl_t cmd_cpu_sub[] = {
  87        U_BOOT_CMD_MKENT(list, 2, 1, do_cpu_list, "", ""),
  88        U_BOOT_CMD_MKENT(detail, 4, 0, do_cpu_detail, "", ""),
  89};
  90
  91/*
  92 * Process a cpu sub-command
  93 */
  94static int do_cpu(cmd_tbl_t *cmdtp, int flag, int argc,
  95                  char * const argv[])
  96{
  97        cmd_tbl_t *c = NULL;
  98
  99        /* Strip off leading 'cpu' command argument */
 100        argc--;
 101        argv++;
 102
 103        if (argc)
 104                c = find_cmd_tbl(argv[0], cmd_cpu_sub,
 105                                 ARRAY_SIZE(cmd_cpu_sub));
 106
 107        if (c)
 108                return c->cmd(cmdtp, flag, argc, argv);
 109        else
 110                return CMD_RET_USAGE;
 111}
 112
 113U_BOOT_CMD(
 114        cpu, 2, 1, do_cpu,
 115        "display information about CPUs",
 116        "list   - list available CPUs\n"
 117        "cpu detail     - show CPU detail"
 118);
 119