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      1 // SPDX-License-Identifier: GPL-2.0+
      2 /*
      3  * Copyright (c) 2015 Google, Inc
      4  * Written by Simon Glass <sjg (at) chromium.org>
      5  * Copyright (c) 2017 lvaro Fernndez Rojas <noltari (at) 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 
     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 
     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 
     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  */
     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