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_vendor(struct udevice *dev, char *buf, int size)
  31 {
  32         const char *vendor = cpu_vendor_name(gd->arch.x86_vendor);
  33
  34         if (size < (strlen(vendor) + 1))
  35                 return -ENOSPC;
  36
  37         strcpy(buf, vendor);
  38
  39         return 0;
  40 }
  41
  42 int cpu_x86_get_desc(struct udevice *dev, char *buf, int size)
  43 {
  44         if (size < CPU_MAX_NAME_LEN)
  45                 return -ENOSPC;
  46
  47         cpu_get_name(buf);
  48
  49         return 0;
  50 }
  51
  52 static int cpu_x86_get_count(struct udevice *dev)
  53 {
  54         int node, cpu;
  55         int num = 0;
  56
  57         node = fdt_path_offset(gd->fdt_blob, "/cpus");
  58         if (node < 0)
  59                 return -ENOENT;
  60
  61         for (cpu = fdt_first_subnode(gd->fdt_blob, node);
  62              cpu >= 0;
  63              cpu = fdt_next_subnode(gd->fdt_blob, cpu)) {
  64                 const char *device_type;
  65
  66                 device_type = fdt_getprop(gd->fdt_blob, cpu,
  67                                           "device_type", NULL);
  68                 if (!device_type)
  69                         continue;
  70                 if (strcmp(device_type, "cpu") == 0)
  71                         num++;
  72         }
  73
  74         return num;
  75 }
  76
  77 static const struct cpu_ops cpu_x86_ops = {
  78         .get_desc       = cpu_x86_get_desc,
  79         .get_count      = cpu_x86_get_count,
  80         .get_vendor     = cpu_x86_get_vendor,
  81 };
  82
  83 static const struct udevice_id cpu_x86_ids[] = {
  84         { .compatible = "cpu-x86" },
  85         { }
  86 };
  87
  88 U_BOOT_DRIVER(cpu_x86_drv) = {
  89         .name           = "cpu_x86",
  90         .id             = UCLASS_CPU,
  91         .of_match       = cpu_x86_ids,
  92         .bind           = cpu_x86_bind,
  93         .ops            = &cpu_x86_ops,
  94 };