jcs.org
"Das U-Boot" Source Tree
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 * Copyright 2024 NXP
7 */
8
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 struct udevice *cpu_find_device(unsigned long cpu_id)
23{
24 struct udevice *dev;
25
26 for (uclass_first_device(UCLASS_CPU, &dev); dev;
27 uclass_next_device(&dev)) {
28 if (cpu_id == dev_seq(dev))
29 return dev;
30 }
31
32 return NULL;
33}
34
35static int print_cpu_list(bool detail)
36{
37 struct udevice *dev;
38 char buf[100];
39
40 for (uclass_first_device(UCLASS_CPU, &dev);
41 dev;
42 uclass_next_device(&dev)) {
43 struct cpu_plat *plat = dev_get_parent_plat(dev);
44 struct cpu_info info;
45 bool first = true;
46 int ret, i;
47
48 ret = cpu_get_desc(dev, buf, sizeof(buf));
49 printf("%3d: %-10s %s\n", dev_seq(dev), dev->name,
50 ret ? "<no description>" : buf);
51 if (!detail)
52 continue;
53 ret = cpu_get_info(dev, &info);
54 if (ret) {
55 printf("\t(no detail available");
56 if (ret != -ENOSYS)
57 printf(": err=%d", ret);
58 printf(")\n");
59 continue;
60 }
61 printf("\tID = %d, freq = ", plat->cpu_id);
62 print_freq(info.cpu_freq, "");
63 for (i = 0; i < CPU_FEAT_COUNT; i++) {
64 if (info.features & (1 << i)) {
65 printf("%s%s", first ? ": " : ", ",
66 cpu_feature_name[i]);
67 first = false;
68 }
69 }
70 printf("\n");
71 if (info.features & (1 << CPU_FEAT_UCODE))
72 printf("\tMicrocode version %#x\n",
73 plat->ucode_version);
74 if (info.features & (1 << CPU_FEAT_DEVICE_ID))
75 printf("\tDevice ID %#lx\n", plat->device_id);
76 }
77
78 return 0;
79}
80
81static int do_cpu_list(struct cmd_tbl *cmdtp, int flag, int argc,
82 char *const argv[])
83{
84 if (print_cpu_list(false))
85 return CMD_RET_FAILURE;
86
87 return 0;
88}
89
90static int do_cpu_detail(struct cmd_tbl *cmdtp, int flag, int argc,
91 char *const argv[])
92{
93 if (print_cpu_list(true))
94 return CMD_RET_FAILURE;
95
96 return 0;
97}
98
99static int do_cpu_release(struct cmd_tbl *cmdtp, int flag, int argc,
100 char *const argv[])
101{
102 struct udevice *dev;
103 unsigned long cpu_id;
104 unsigned long long boot_addr;
105
106 if (argc != 3)
107 return CMD_RET_USAGE;
108
109 cpu_id = dectoul(argv[1], NULL);
110 dev = cpu_find_device(cpu_id);
111 if (!dev)
112 return CMD_RET_FAILURE;
113
114 boot_addr = simple_strtoull(argv[2], NULL, 16);
115
116 if (cpu_release_core(dev, boot_addr))
117 return CMD_RET_FAILURE;
118
119 return 0;
120}
121
122U_BOOT_LONGHELP(cpu,
123 "list - list available CPUs\n"
124 "cpu detail - show CPU detail\n"
125 "cpu release <core ID> <addr> - Release CPU <core ID> at <addr>\n"
126 " <core ID>: the sequence number in list subcommand outputs");
127
128U_BOOT_CMD_WITH_SUBCMDS(cpu, "display information about CPUs", cpu_help_text,
129 U_BOOT_SUBCMD_MKENT(list, 1, 1, do_cpu_list),
130 U_BOOT_SUBCMD_MKENT(detail, 1, 0, do_cpu_detail),
131 U_BOOT_SUBCMD_MKENT(release, 3, 0, do_cpu_release));