arch/x86/cpu/cpu_x86.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2015, Bin Meng <[email protected]>
   4  */
   5
   6 #include <common.h>
   7 #include <cpu.h>
   8 #include <dm.h>
   9 #include <errno.h>
  10 #include <asm/cpu.h>
  11
  12 DECLARE_GLOBAL_DATA_PTR;
  13
  14 int cpu_x86_bind(struct udevice *dev)
  15 {
  16         struct cpu_plat *plat = dev_get_parent_plat(dev);
  17         struct cpuid_result res;
  18
  19         plat->cpu_id = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
  20                                       "intel,apic-id", -1);
  21         plat->family = gd->arch.x86;
  22         res = cpuid(1);
  23         plat->id[0] = res.eax;
  24         plat->id[1] = res.edx;
  25
  26         return 0;
  27 }
  28
  29 int cpu_x86_get_vendor(const struct udevice *dev, char *buf, int size)
  30 {
  31         const char *vendor = cpu_vendor_name(gd->arch.x86_vendor);
  32
  33         if (size < (strlen(vendor) + 1))
  34                 return -ENOSPC;
  35
  36         strcpy(buf, vendor);
  37
  38         return 0;
  39 }
  40
  41 int cpu_x86_get_desc(const struct udevice *dev, char *buf, int size)
  42 {
  43         char *ptr;
  44
  45         if (size < CPU_MAX_NAME_LEN)
  46                 return -ENOSPC;
  47
  48         ptr = cpu_get_name(buf);
  49         if (ptr != buf)
  50                 strcpy(buf, ptr);
  51
  52         return 0;
  53 }
  54
  55 int cpu_x86_get_count(const struct udevice *dev)
  56 {
  57         int node, cpu;
  58         int num = 0;
  59
  60         node = fdt_path_offset(gd->fdt_blob, "/cpus");
  61         if (node < 0)
  62                 return -ENOENT;
  63
  64         for (cpu = fdt_first_subnode(gd->fdt_blob, node);
  65              cpu >= 0;
  66              cpu = fdt_next_subnode(gd->fdt_blob, cpu)) {
  67                 const char *device_type;
  68
  69                 device_type = fdt_getprop(gd->fdt_blob, cpu,
  70                                           "device_type", NULL);
  71                 if (!device_type)
  72                         continue;
  73                 if (strcmp(device_type, "cpu") == 0)
  74                         num++;
  75         }
  76
  77         return num;
  78 }
  79
  80 static const struct cpu_ops cpu_x86_ops = {
  81         .get_desc       = cpu_x86_get_desc,
  82         .get_count      = cpu_x86_get_count,
  83         .get_vendor     = cpu_x86_get_vendor,
  84 };
  85
  86 static const struct udevice_id cpu_x86_ids[] = {
  87         { .compatible = "cpu-x86" },
  88         { }
  89 };
  90
  91 U_BOOT_DRIVER(cpu_x86_drv) = {
  92         .name           = "cpu_x86",
  93         .id             = UCLASS_CPU,
  94         .of_match       = cpu_x86_ids,
  95         .bind           = cpu_x86_bind,
  96         .ops            = &cpu_x86_ops,
  97         .flags          = DM_FLAG_PRE_RELOC,
  98 };