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