Add a 'cpu' command to print CPU information
Add a simple command which provides access to a list of available CPUs along
with descriptions and basic information.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/common/Kconfig b/common/Kconfig
index 5d7e48a..15759f7 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -31,6 +31,14 @@
help
Print console devices and information.
+config CMD_CPU
+ bool "cpu"
+ help
+ Print information about available CPUs. This normally shows the
+ number of CPUs, type (e.g. manufacturer, architecture, product or
+ internal name) and clock frequency. Other information may be
+ available depending on the CPU driver.
+
config CMD_LICENSE
bool "license"
help
diff --git a/common/Makefile b/common/Makefile
index fba3830..9084c73 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -74,6 +74,7 @@
obj-$(CONFIG_CMD_CLK) += cmd_clk.o
obj-$(CONFIG_CMD_CONSOLE) += cmd_console.o
obj-$(CONFIG_CMD_CPLBINFO) += cmd_cplbinfo.o
+obj-$(CONFIG_CMD_CPU) += cmd_cpu.o
obj-$(CONFIG_DATAFLASH_MMC_SELECT) += cmd_dataflash_mmc_mux.o
obj-$(CONFIG_CMD_DATE) += cmd_date.o
obj-$(CONFIG_CMD_DEMO) += cmd_demo.o
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"
+);