u-boot/drivers/cpu/cpu-uclass.c
Bin Meng 6e6f4ce4f8 x86: Move MP initialization codes into a common place
Most of the MP initialization codes in arch/x86/cpu/baytrail/cpu.c is
common to all x86 processors, except detect_num_cpus() which varies
from cpu to cpu. Move these to arch/x86/cpu/cpu.c and implement the
new 'get_count' method for baytrail and cpu_x86 drivers. Now we call
cpu_get_count() in mp_init() to get the number of CPUs.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
2015-07-14 18:03:16 -06:00

75 lines
1.3 KiB
C

/*
* Copyright (C) 2015 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <cpu.h>
#include <dm.h>
#include <errno.h>
#include <dm/lists.h>
#include <dm/root.h>
DECLARE_GLOBAL_DATA_PTR;
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);
}
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;
int node;
int ret;
node = fdt_path_offset(gd->fdt_blob, "/cpus");
if (node < 0)
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,
};