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
  12DECLARE_GLOBAL_DATA_PTR;
  13
  14int cpu_x86_bind(struct udevice *dev)
  15{
  16        struct cpu_platdata *plat = dev_get_parent_platdata(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
  29int cpu_x86_get_vendor(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
  41int cpu_x86_get_desc(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
  55static int cpu_x86_get_count(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
  80static 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
  86static const struct udevice_id cpu_x86_ids[] = {
  87        { .compatible = "cpu-x86" },
  88        { }
  89};
  90
  91U_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};
  99