1 files changed, 91 insertions, 0 deletions
diff --git a/cmd/cpu.c b/cmd/cpu.c
new file mode 100644
index 00000000000..9e323069b9e
--- /dev/null
+++ b/cmd/cpu.c
@@ -0,0 +1,91 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2015 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ * Copyright (c) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
+ */
+
+#include <command.h>
+#include <cpu.h>
+#include <display_options.h>
+#include <dm.h>
+#include <errno.h>
+
+static const char *cpu_feature_name[CPU_FEAT_COUNT] = {
+	"L1 cache",
+	"MMU",
+	"Microcode",
+	"Device ID",
+};
+
+static int print_cpu_list(bool detail)
+{
+	struct udevice *dev;
+	char buf[100];
+
+	for (uclass_first_device(UCLASS_CPU, &dev);
+		     dev;
+		     uclass_next_device(&dev)) {
+		struct cpu_plat *plat = dev_get_parent_plat(dev);
+		struct cpu_info info;
+		bool first = true;
+		int ret, i;
+
+		ret = cpu_get_desc(dev, buf, sizeof(buf));
+		printf("%3d: %-10s %s\n", dev_seq(dev), dev->name,
+		       ret ? "<no description>" : buf);
+		if (!detail)
+			continue;
+		ret = cpu_get_info(dev, &info);
+		if (ret) {
+			printf("\t(no detail available");
+			if (ret != -ENOSYS)
+				printf(": err=%d", ret);
+			printf(")\n");
+			continue;
+		}
+		printf("\tID = %d, freq = ", plat->cpu_id);
+		print_freq(info.cpu_freq, "");
+		for (i = 0; i < CPU_FEAT_COUNT; i++) {
+			if (info.features & (1 << i)) {
+				printf("%s%s", first ? ": " : ", ",
+				       cpu_feature_name[i]);
+				first = false;
+			}
+		}
+		printf("\n");
+		if (info.features & (1 << CPU_FEAT_UCODE))
+			printf("\tMicrocode version %#x\n",
+			       plat->ucode_version);
+		if (info.features & (1 << CPU_FEAT_DEVICE_ID))
+			printf("\tDevice ID %#lx\n", plat->device_id);
+	}
+
+	return 0;
+}
+
+static int do_cpu_list(struct cmd_tbl *cmdtp, int flag, int argc,
+		       char *const argv[])
+{
+	if (print_cpu_list(false))
+		return CMD_RET_FAILURE;
+
+	return 0;
+}
+
+static int do_cpu_detail(struct cmd_tbl *cmdtp, int flag, int argc,
+			 char *const argv[])
+{
+	if (print_cpu_list(true))
+		return CMD_RET_FAILURE;
+
+	return 0;
+}
+
+U_BOOT_LONGHELP(cpu,
+	"list	- list available CPUs\n"
+	"cpu detail	- show CPU detail");
+
+U_BOOT_CMD_WITH_SUBCMDS(cpu, "display information about CPUs", cpu_help_text,
+	U_BOOT_SUBCMD_MKENT(list, 1, 1, do_cpu_list),
+	U_BOOT_SUBCMD_MKENT(detail, 1, 0, do_cpu_detail));