arch/x86/cpu/cpu_x86.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
   4  */
   5
   6 #include <common.h>
   7 #include <cpu.h>
   8 #include <dm.h>
   9 #include <errno.h>
  10 #include <asm/cpu.h>
  11 #include <asm/global_data.h>
  12
  13 DECLARE_GLOBAL_DATA_PTR;
  14
  15 int cpu_x86_bind(struct udevice *dev)
  16 {
  17         struct cpu_plat *plat = dev_get_parent_plat(dev);
  18         struct cpuid_result res;
  19
  20         plat->cpu_id = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
  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(const 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(const struct udevice *dev, char *buf, int size)
  43 {
  44         char *ptr;
  45
  46         if (size < CPU_MAX_NAME_LEN)
  47                 return -ENOSPC;
  48
  49         ptr = cpu_get_name(buf);
  50         if (ptr != buf)
  51                 strcpy(buf, ptr);
  52
  53         return 0;
  54 }
  55
  56 int cpu_x86_get_count(const struct udevice *dev)
  57 {
  58         int node, cpu;
  59         int num = 0;
  60
  61         node = fdt_path_offset(gd->fdt_blob, "/cpus");
  62         if (node < 0)
  63                 return -ENOENT;
  64
  65         for (cpu = fdt_first_subnode(gd->fdt_blob, node);
  66              cpu >= 0;
  67              cpu = fdt_next_subnode(gd->fdt_blob, cpu)) {
  68                 const char *device_type;
  69
  70                 device_type = fdt_getprop(gd->fdt_blob, cpu,
  71                                           "device_type", NULL);
  72                 if (!device_type)
  73                         continue;
  74                 if (strcmp(device_type, "cpu") == 0)
  75                         num++;
  76         }
  77
  78         return num;
  79 }
  80
  81 static const struct cpu_ops cpu_x86_ops = {
  82         .get_desc       = cpu_x86_get_desc,
  83         .get_count      = cpu_x86_get_count,
  84         .get_vendor     = cpu_x86_get_vendor,
  85 };
  86
  87 static const struct udevice_id cpu_x86_ids[] = {
  88         { .compatible = "cpu-x86" },
  89         { }
  90 };
  91
  92 U_BOOT_DRIVER(cpu_x86_drv) = {
  93         .name           = "cpu_x86",
  94         .id             = UCLASS_CPU,
  95         .of_match       = cpu_x86_ids,
  96         .bind           = cpu_x86_bind,
  97         .ops            = &cpu_x86_ops,
  98         .flags          = DM_FLAG_PRE_RELOC,
  99 };