xref: /openbmc/u-boot/cmd/cpu.c (revision 1f7efe82)
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  );
119