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8e2fac051a
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>
114 lines
2.2 KiB
C
114 lines
2.2 KiB
C
/*
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* Copyright (c) 2015 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <command.h>
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#include <cpu.h>
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#include <dm.h>
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static const char *cpu_feature_name[CPU_FEAT_COUNT] = {
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"L1 cache",
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"MMU",
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};
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static int print_cpu_list(bool detail)
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{
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struct udevice *dev;
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struct uclass *uc;
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char buf[100];
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int ret;
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ret = uclass_get(UCLASS_CPU, &uc);
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if (ret) {
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printf("Cannot find CPU uclass\n");
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return ret;
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}
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uclass_foreach_dev(dev, uc) {
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struct cpu_platdata *plat = dev_get_parent_platdata(dev);
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struct cpu_info info;
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bool first;
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int i;
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ret = cpu_get_desc(dev, buf, sizeof(buf));
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printf("%3d: %-10s %s\n", dev->seq, dev->name,
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ret ? "<no description>" : buf);
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if (!detail)
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continue;
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ret = cpu_get_info(dev, &info);
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if (ret) {
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printf("\t(no detail available");
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if (ret != -ENOSYS)
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printf(": err=%d\n", ret);
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printf(")\n");
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continue;
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}
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printf("\tID = %d, freq = ", plat->cpu_id);
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print_freq(info.cpu_freq, "");
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first = true;
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for (i = 0; i < CPU_FEAT_COUNT; i++) {
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if (info.features & (1 << i)) {
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printf("%s%s", first ? ": " : ", ",
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cpu_feature_name[i]);
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first = false;
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}
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}
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printf("\n");
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}
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return 0;
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}
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static int do_cpu_list(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
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{
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if (print_cpu_list(false))
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return CMD_RET_FAILURE;
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return 0;
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}
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static int do_cpu_detail(cmd_tbl_t *cmdtp, int flag, int argc,
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char *const argv[])
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{
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if (print_cpu_list(true))
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return CMD_RET_FAILURE;
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return 0;
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}
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static cmd_tbl_t cmd_cpu_sub[] = {
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U_BOOT_CMD_MKENT(list, 2, 1, do_cpu_list, "", ""),
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U_BOOT_CMD_MKENT(detail, 4, 0, do_cpu_detail, "", ""),
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};
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/*
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* Process a cpu sub-command
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*/
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static int do_cpu(cmd_tbl_t *cmdtp, int flag, int argc,
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char * const argv[])
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{
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cmd_tbl_t *c = NULL;
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/* Strip off leading 'cpu' command argument */
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argc--;
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argv++;
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if (argc)
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c = find_cmd_tbl(argv[0], cmd_cpu_sub, ARRAY_SIZE(cmd_cpu_sub));
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if (c)
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return c->cmd(cmdtp, flag, argc, argv);
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else
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return CMD_RET_USAGE;
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}
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U_BOOT_CMD(
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cpu, 2, 1, do_cpu,
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"display information about CPUs",
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"list - list available CPUs\n"
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"cpu detail - show CPU detail"
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);
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