xref: /openbmc/u-boot/cmd/cpu.c (revision 98d62e61)
1 /*
2  * Copyright (c) 2015 Google, Inc
3  * Written by Simon Glass <sjg@chromium.org>
4  *
5  * SPDX-License-Identifier:	GPL-2.0+
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 };
19 
20 static int print_cpu_list(bool detail)
21 {
22 	struct udevice *dev;
23 	struct uclass *uc;
24 	char buf[100];
25 	int ret;
26 
27 	ret = uclass_get(UCLASS_CPU, &uc);
28 	if (ret) {
29 		printf("Cannot find CPU uclass\n");
30 		return ret;
31 	}
32 	uclass_foreach_dev(dev, uc) {
33 		struct cpu_platdata *plat = dev_get_parent_platdata(dev);
34 		struct cpu_info info;
35 		bool first;
36 		int i;
37 
38 		ret = cpu_get_desc(dev, buf, sizeof(buf));
39 		printf("%3d: %-10s %s\n", dev->seq, dev->name,
40 		       ret ? "<no description>" : buf);
41 		if (!detail)
42 			continue;
43 		ret = cpu_get_info(dev, &info);
44 		if (ret) {
45 			printf("\t(no detail available");
46 			if (ret != -ENOSYS)
47 				printf(": err=%d\n", ret);
48 			printf(")\n");
49 			continue;
50 		}
51 		printf("\tID = %d, freq = ", plat->cpu_id);
52 		print_freq(info.cpu_freq, "");
53 		first = true;
54 		for (i = 0; i < CPU_FEAT_COUNT; i++) {
55 			if (info.features & (1 << i)) {
56 				printf("%s%s", first ? ": " : ", ",
57 				       cpu_feature_name[i]);
58 				first = false;
59 			}
60 		}
61 		printf("\n");
62 		if (info.features & (1 << CPU_FEAT_UCODE)) {
63 			printf("\tMicrocode version %#x\n",
64 			       plat->ucode_version);
65 		}
66 		if (info.features & (1 << CPU_FEAT_DEVICE_ID))
67 			printf("\tDevice ID %#lx\n", plat->device_id);
68 	}
69 
70 	return 0;
71 }
72 
73 static int do_cpu_list(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
74 {
75 	if (print_cpu_list(false))
76 		return CMD_RET_FAILURE;
77 
78 	return 0;
79 }
80 
81 static int do_cpu_detail(cmd_tbl_t *cmdtp, int flag, int argc,
82 			 char *const argv[])
83 {
84 	if (print_cpu_list(true))
85 		return CMD_RET_FAILURE;
86 
87 	return 0;
88 }
89 
90 static cmd_tbl_t cmd_cpu_sub[] = {
91 	U_BOOT_CMD_MKENT(list, 2, 1, do_cpu_list, "", ""),
92 	U_BOOT_CMD_MKENT(detail, 4, 0, do_cpu_detail, "", ""),
93 };
94 
95 /*
96  * Process a cpu sub-command
97  */
98 static int do_cpu(cmd_tbl_t *cmdtp, int flag, int argc,
99 		       char * const argv[])
100 {
101 	cmd_tbl_t *c = NULL;
102 
103 	/* Strip off leading 'cpu' command argument */
104 	argc--;
105 	argv++;
106 
107 	if (argc)
108 		c = find_cmd_tbl(argv[0], cmd_cpu_sub, ARRAY_SIZE(cmd_cpu_sub));
109 
110 	if (c)
111 		return c->cmd(cmdtp, flag, argc, argv);
112 	else
113 		return CMD_RET_USAGE;
114 }
115 
116 U_BOOT_CMD(
117 	cpu, 2, 1, do_cpu,
118 	"display information about CPUs",
119 	"list	- list available CPUs\n"
120 	"cpu detail	- show CPU detail"
121 );
122