LXR uboot/arch/x86/cpu/cpu

   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
  13DECLARE_GLOBAL_DATA_PTR;
  14
  15int 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
  30int 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
  42int 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
  56int 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
  81static 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
  87static const struct udevice_id cpu_x86_ids[] = {
  88        { .compatible = "cpu-x86" },
  89        { }
  90};
  91
  92U_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};
 100