git.sur5r.net Git - u-boot/blob - arch/x86/cpu/qemu/cpu.c

   1 /*
   2  * Copyright (C) 2015, Miao Yan <yanmiaobest@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 #include <asm/fw_cfg.h>
  13
  14 DECLARE_GLOBAL_DATA_PTR;
  15
  16 int cpu_qemu_bind(struct udevice *dev)
  17 {
  18         struct cpu_platdata *plat = dev_get_parent_platdata(dev);
  19
  20         plat->cpu_id = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
  21                                       "intel,apic-id", -1);
  22
  23         return 0;
  24 }
  25
  26 int cpu_qemu_get_desc(struct udevice *dev, char *buf, int size)
  27 {
  28         if (size < CPU_MAX_NAME_LEN)
  29                 return -ENOSPC;
  30
  31         cpu_get_name(buf);
  32
  33         return 0;
  34 }
  35
  36 static int cpu_qemu_get_count(struct udevice *dev)
  37 {
  38         return qemu_fwcfg_online_cpus();
  39 }
  40
  41 static const struct cpu_ops cpu_qemu_ops = {
  42         .get_desc       = cpu_qemu_get_desc,
  43         .get_count      = cpu_qemu_get_count,
  44 };
  45
  46 static const struct udevice_id cpu_qemu_ids[] = {
  47         { .compatible = "cpu-qemu" },
  48         { }
  49 };
  50
  51 U_BOOT_DRIVER(cpu_qemu_drv) = {
  52         .name           = "cpu_qemu",
  53         .id             = UCLASS_CPU,
  54         .of_match       = cpu_qemu_ids,
  55         .bind           = cpu_qemu_bind,
  56         .ops            = &cpu_qemu_ops,
  57 };