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 ��lvaro Fern��ndez 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
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_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
68static 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
77static 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
86U_BOOT_LONGHELP(cpu,
87	"list	- list available CPUs\n"
88	"cpu detail	- show CPU detail");
89
90U_BOOT_CMD_WITH_SUBCMDS(cpu, "display information about CPUs", cpu_help_text,
91	U_BOOT_SUBCMD_MKENT(list, 1, 1, do_cpu_list),
92	U_BOOT_SUBCMD_MKENT(detail, 1, 0, do_cpu_detail));
93