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 <display_options.h>
12 #include <dm.h>
13 #include <errno.h>
14
15 static const char *cpu_feature_name[CPU_FEAT_COUNT] = {
16 "L1 cache",
17 "MMU",
18 "Microcode",
19 "Device ID",
20 };
21
print_cpu_list(bool detail)22 static 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_plat *plat = dev_get_parent_plat(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), 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
do_cpu_list(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])68 static int do_cpu_list(struct cmd_tbl *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
do_cpu_detail(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])77 static int do_cpu_detail(struct cmd_tbl *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
86 #if IS_ENABLED(CONFIG_SYS_LONGHELP)
87 static char cpu_help_text[] =
88 "list - list available CPUs\n"
89 "cpu detail - show CPU detail"
90 ;
91 #endif
92
93 U_BOOT_CMD_WITH_SUBCMDS(cpu, "display information about CPUs", cpu_help_text,
94 U_BOOT_SUBCMD_MKENT(list, 1, 1, do_cpu_list),
95 U_BOOT_SUBCMD_MKENT(detail, 1, 0, do_cpu_detail));
96