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