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1 /*
2  * Copyright (c) 2015 Google, Inc
3  * Written by Simon Glass <sjg@chromium.org>
4  * Copyright (c) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
5  *
6  * SPDX-License-Identifier:     GPL-2.0+
7  */
8
9 #include <common.h>
10 #include <command.h>
11 #include <cpu.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
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_platdata *plat = dev_get_parent_platdata(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->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
68 static int do_cpu_list(cmd_tbl_t *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
77 static int do_cpu_detail(cmd_tbl_t *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 static cmd_tbl_t cmd_cpu_sub[] = {
87         U_BOOT_CMD_MKENT(list, 2, 1, do_cpu_list, "", ""),
88         U_BOOT_CMD_MKENT(detail, 4, 0, do_cpu_detail, "", ""),
89 };
90
91 /*
92  * Process a cpu sub-command
93  */
94 static int do_cpu(cmd_tbl_t *cmdtp, int flag, int argc,
95                   char * const argv[])
96 {
97         cmd_tbl_t *c = NULL;
98
99         /* Strip off leading 'cpu' command argument */
100         argc--;
101         argv++;
102
103         if (argc)
104                 c = find_cmd_tbl(argv[0], cmd_cpu_sub,
105                                  ARRAY_SIZE(cmd_cpu_sub));
106
107         if (c)
108                 return c->cmd(cmdtp, flag, argc, argv);
109         else
110                 return CMD_RET_USAGE;
111 }
112
113 U_BOOT_CMD(
114         cpu, 2, 1, do_cpu,
115         "display information about CPUs",
116         "list   - list available CPUs\n"
117         "cpu detail     - show CPU detail"
118 );