git.sur5r.net Git - u-boot/blob - arch/x86/cpu/cpu_x86.c

   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
  13 DECLARE_GLOBAL_DATA_PTR;
  14
  15 int cpu_x86_bind(struct udevice *dev)
  16 {
  17         struct cpu_platdata *plat = dev_get_parent_platdata(dev);
  18         struct cpuid_result res;
  19
  20         plat->cpu_id = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
  21                                       "intel,apic-id", -1);
  22         plat->family = gd->arch.x86;
  23         res = cpuid(1);
  24         plat->id[0] = res.eax;
  25         plat->id[1] = res.edx;
  26
  27         return 0;
  28 }
  29
  30 int cpu_x86_get_desc(struct udevice *dev, char *buf, int size)
  31 {
  32         if (size < CPU_MAX_NAME_LEN)
  33                 return -ENOSPC;
  34
  35         cpu_get_name(buf);
  36
  37         return 0;
  38 }
  39
  40 static int cpu_x86_get_count(struct udevice *dev)
  41 {
  42         int node, cpu;
  43         int num = 0;
  44
  45         node = fdt_path_offset(gd->fdt_blob, "/cpus");
  46         if (node < 0)
  47                 return -ENOENT;
  48
  49         for (cpu = fdt_first_subnode(gd->fdt_blob, node);
  50              cpu >= 0;
  51              cpu = fdt_next_subnode(gd->fdt_blob, cpu)) {
  52                 const char *device_type;
  53
  54                 device_type = fdt_getprop(gd->fdt_blob, cpu,
  55                                           "device_type", NULL);
  56                 if (!device_type)
  57                         continue;
  58                 if (strcmp(device_type, "cpu") == 0)
  59                         num++;
  60         }
  61
  62         return num;
  63 }
  64
  65 static const struct cpu_ops cpu_x86_ops = {
  66         .get_desc       = cpu_x86_get_desc,
  67         .get_count      = cpu_x86_get_count,
  68 };
  69
  70 static const struct udevice_id cpu_x86_ids[] = {
  71         { .compatible = "cpu-x86" },
  72         { }
  73 };
  74
  75 U_BOOT_DRIVER(cpu_x86_drv) = {
  76         .name           = "cpu_x86",
  77         .id             = UCLASS_CPU,
  78         .of_match       = cpu_x86_ids,
  79         .bind           = cpu_x86_bind,
  80         .ops            = &cpu_x86_ops,
  81 };