LXR uboot/arch/x86/cpu/cpu

   1/*
   2 * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
   3 *
   4 * SPDX-License-Identifier:     GPL-2.0+
   5 */
   6
   7#include <common.h>
   8#include <cpu.h>
   9#include <dm.h>
  10#include <errno.h>
  11#include <asm/cpu.h>
  12
  13DECLARE_GLOBAL_DATA_PTR;
  14
  15int cpu_x86_bind(struct udevice *dev)
  16{
  17        struct cpu_platdata *plat = dev_get_parent_platdata(dev);
  18
  19        plat->cpu_id = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
  20                                      "intel,apic-id", -1);
  21
  22        return 0;
  23}
  24
  25int cpu_x86_get_desc(struct udevice *dev, char *buf, int size)
  26{
  27        if (size < CPU_MAX_NAME_LEN)
  28                return -ENOSPC;
  29
  30        cpu_get_name(buf);
  31
  32        return 0;
  33}
  34
  35static int cpu_x86_get_count(struct udevice *dev)
  36{
  37        int node, cpu;
  38        int num = 0;
  39
  40        node = fdt_path_offset(gd->fdt_blob, "/cpus");
  41        if (node < 0)
  42                return -ENOENT;
  43
  44        for (cpu = fdt_first_subnode(gd->fdt_blob, node);
  45             cpu >= 0;
  46             cpu = fdt_next_subnode(gd->fdt_blob, cpu)) {
  47                const char *device_type;
  48
  49                device_type = fdt_getprop(gd->fdt_blob, cpu,
  50                                          "device_type", NULL);
  51                if (!device_type)
  52                        continue;
  53                if (strcmp(device_type, "cpu") == 0)
  54                        num++;
  55        }
  56
  57        return num;
  58}
  59
  60static const struct cpu_ops cpu_x86_ops = {
  61        .get_desc       = cpu_x86_get_desc,
  62        .get_count      = cpu_x86_get_count,
  63};
  64
  65static const struct udevice_id cpu_x86_ids[] = {
  66        { .compatible = "cpu-x86" },
  67        { }
  68};
  69
  70U_BOOT_DRIVER(cpu_x86_drv) = {
  71        .name           = "cpu_x86",
  72        .id             = UCLASS_CPU,
  73        .of_match       = cpu_x86_ids,
  74        .bind           = cpu_x86_bind,
  75        .ops            = &cpu_x86_ops,
  76};
  77