cpu-uclass.c
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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2015 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*/
#include <common.h>
#include <cpu.h>
#include <dm.h>
#include <errno.h>
#include <dm/lists.h>
#include <dm/root.h>
int cpu_probe_all(void)
{
struct udevice *cpu;
int ret;
ret = uclass_first_device(UCLASS_CPU, &cpu);
if (ret) {
debug("%s: No CPU found (err = %d)\n", __func__, ret);
return ret;
}
while (cpu) {
ret = uclass_next_device(&cpu);
if (ret) {
debug("%s: Error while probing CPU (err = %d)\n",
__func__, ret);
return ret;
}
}
return 0;
}
struct udevice *cpu_get_current_dev(void)
{
struct udevice *cpu = NULL;
int ret;
for (uclass_first_device(UCLASS_CPU, &cpu); cpu;
uclass_next_device(&cpu)) {
struct cpu_ops *ops = cpu_get_ops(cpu);
if (ops->is_current_cpu) {
if (ops->is_current_cpu(cpu))
return cpu;
}
}
/* If can't find current cpu device, use the first dev insteaded */
ret = uclass_first_device_err(UCLASS_CPU, &cpu);
if (ret) {
debug("%s: Could not get CPU device (err = %d)\n",
__func__, ret);
return NULL;
}
return cpu;
}
int cpu_get_desc(struct udevice *dev, char *buf, int size)
{
struct cpu_ops *ops = cpu_get_ops(dev);
if (!ops->get_desc)
return -ENOSYS;
return ops->get_desc(dev, buf, size);
}
int cpu_get_info(struct udevice *dev, struct cpu_info *info)
{
struct cpu_ops *ops = cpu_get_ops(dev);
if (!ops->get_info)
return -ENOSYS;
return ops->get_info(dev, info);
}
int cpu_get_count(struct udevice *dev)
{
struct cpu_ops *ops = cpu_get_ops(dev);
if (!ops->get_count)
return -ENOSYS;
return ops->get_count(dev);
}
int cpu_get_vendor(struct udevice *dev, char *buf, int size)
{
struct cpu_ops *ops = cpu_get_ops(dev);
if (!ops->get_vendor)
return -ENOSYS;
return ops->get_vendor(dev, buf, size);
}
U_BOOT_DRIVER(cpu_bus) = {
.name = "cpu_bus",
.id = UCLASS_SIMPLE_BUS,
.per_child_platdata_auto_alloc_size = sizeof(struct cpu_platdata),
};
static int uclass_cpu_init(struct uclass *uc)
{
struct udevice *dev;
ofnode node;
int ret;
node = ofnode_path("/cpus");
if (!ofnode_valid(node))
return 0;
ret = device_bind_driver_to_node(dm_root(), "cpu_bus", "cpus", node,
&dev);
return ret;
}
UCLASS_DRIVER(cpu) = {
.id = UCLASS_CPU,
.name = "cpu",
.flags = DM_UC_FLAG_SEQ_ALIAS,
.init = uclass_cpu_init,
};