cpu.c
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/*
* Copyright (c) 2015 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
* Copyright (c) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <command.h>
#include <cpu.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_platdata *plat = dev_get_parent_platdata(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->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(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"
);