u-boot/arch/x86/cpu/cpu_x86.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

76 lines
1.4 KiB
C

/*
* Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <cpu.h>
#include <dm.h>
#include <errno.h>
#include <asm/cpu.h>
DECLARE_GLOBAL_DATA_PTR;
int cpu_x86_bind(struct udevice *dev)
{
struct cpu_platdata *plat = dev_get_parent_platdata(dev);
plat->cpu_id = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
"intel,apic-id", -1);
return 0;
}
int cpu_x86_get_desc(struct udevice *dev, char *buf, int size)
{
if (size < CPU_MAX_NAME_LEN)
return -ENOSPC;
cpu_get_name(buf);
return 0;
}
static int cpu_x86_get_count(struct udevice *dev)
{
int node, cpu;
int num = 0;
node = fdt_path_offset(gd->fdt_blob, "/cpus");
if (node < 0)
return -ENOENT;
for (cpu = fdt_first_subnode(gd->fdt_blob, node);
cpu >= 0;
cpu = fdt_next_subnode(gd->fdt_blob, cpu)) {
const char *device_type;
device_type = fdt_getprop(gd->fdt_blob, cpu,
"device_type", NULL);
if (!device_type)
continue;
if (strcmp(device_type, "cpu") == 0)
num++;
}
return num;
}
static const struct cpu_ops cpu_x86_ops = {
.get_desc = cpu_x86_get_desc,
.get_count = cpu_x86_get_count,
};
static const struct udevice_id cpu_x86_ids[] = {
{ .compatible = "cpu-x86" },
{ }
};
U_BOOT_DRIVER(cpu_x86_drv) = {
.name = "cpu_x86",
.id = UCLASS_CPU,
.of_match = cpu_x86_ids,
.bind = cpu_x86_bind,
.ops = &cpu_x86_ops,
};