From 8e2fac051a477cec406606afaf3d4cec7fbdcbd4 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Tue, 28 Apr 2015 20:25:11 -0600 Subject: [PATCH] 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 Reviewed-by: Bin Meng --- common/Kconfig | 8 ++++ common/Makefile | 1 + common/cmd_cpu.c | 113 +++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 122 insertions(+) create mode 100644 common/cmd_cpu.c diff --git a/common/Kconfig b/common/Kconfig index 5d7e48a5b6..15759f75aa 100644 --- a/common/Kconfig +++ b/common/Kconfig @@ -31,6 +31,14 @@ config CMD_CONSOLE 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 fba3830f1d..9084c73ad9 100644 --- a/common/Makefile +++ b/common/Makefile @@ -74,6 +74,7 @@ obj-$(CONFIG_CMD_CBFS) += cmd_cbfs.o obj-$(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 0000000000..c3e229f00a --- /dev/null +++ b/common/cmd_cpu.c @@ -0,0 +1,113 @@ +/* + * Copyright (c) 2015 Google, Inc + * Written by Simon Glass + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include +#include + +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 ? "" : 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" +); -- 2.39.5