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-rw-r--r--common/cmd_cpu.c113
1 files changed, 113 insertions, 0 deletions
diff --git a/common/cmd_cpu.c b/common/cmd_cpu.c
new file mode 100644
index 0000000..c3e229f
--- /dev/null
+++ b/common/cmd_cpu.c
@@ -0,0 +1,113 @@
+/*
+ * Copyright (c) 2015 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <command.h>
+#include <cpu.h>
+#include <dm.h>
+
+static const char *cpu_feature_name[CPU_FEAT_COUNT] = {
+ "L1 cache",
+ "MMU",
+};
+
+static int print_cpu_list(bool detail)
+{
+ struct udevice *dev;
+ struct uclass *uc;
+ char buf[100];
+ int ret;
+
+ ret = uclass_get(UCLASS_CPU, &uc);
+ if (ret) {
+ printf("Cannot find CPU uclass\n");
+ return ret;
+ }
+ uclass_foreach_dev(dev, uc) {
+ struct cpu_platdata *plat = dev_get_parent_platdata(dev);
+ struct cpu_info info;
+ bool first;
+ int i;
+
+ ret = cpu_get_desc(dev, buf, sizeof(buf));
+ printf("%3d: %-10s %s\n", dev->seq, 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\n", ret);
+ printf(")\n");
+ continue;
+ }
+ printf("\tID = %d, freq = ", plat->cpu_id);
+ print_freq(info.cpu_freq, "");
+ first = true;
+ 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");
+ }
+
+ return 0;
+}
+
+static int do_cpu_list(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
+{
+ if (print_cpu_list(false))
+ return CMD_RET_FAILURE;
+
+ return 0;
+}
+
+static int do_cpu_detail(cmd_tbl_t *cmdtp, int flag, int argc,
+ char *const argv[])
+{
+ if (print_cpu_list(true))
+ return CMD_RET_FAILURE;
+
+ return 0;
+}
+
+static cmd_tbl_t cmd_cpu_sub[] = {
+ U_BOOT_CMD_MKENT(list, 2, 1, do_cpu_list, "", ""),
+ U_BOOT_CMD_MKENT(detail, 4, 0, do_cpu_detail, "", ""),
+};
+
+/*
+ * Process a cpu sub-command
+ */
+static int do_cpu(cmd_tbl_t *cmdtp, int flag, int argc,
+ char * const argv[])
+{
+ cmd_tbl_t *c = NULL;
+
+ /* Strip off leading 'cpu' command argument */
+ argc--;
+ argv++;
+
+ if (argc)
+ c = find_cmd_tbl(argv[0], cmd_cpu_sub, ARRAY_SIZE(cmd_cpu_sub));
+
+ if (c)
+ return c->cmd(cmdtp, flag, argc, argv);
+ else
+ return CMD_RET_USAGE;
+}
+
+U_BOOT_CMD(
+ cpu, 2, 1, do_cpu,
+ "display information about CPUs",
+ "list - list available CPUs\n"
+ "cpu detail - show CPU detail"
+);