arch/x86/cpu/qemu/cpu.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2015, Miao Yan <yanmiaobest@gmail.com>
   4  */
   5
   6 #include <common.h>
   7 #include <cpu.h>
   8 #include <dm.h>
   9 #include <errno.h>
  10 #include <qfw.h>
  11 #include <asm/cpu.h>
  12
  13 int cpu_qemu_get_desc(const struct udevice *dev, char *buf, int size)
  14 {
  15         if (size < CPU_MAX_NAME_LEN)
  16                 return -ENOSPC;
  17
  18         cpu_get_name(buf);
  19
  20         return 0;
  21 }
  22
  23 static int cpu_qemu_get_count(const struct udevice *dev)
  24 {
  25         int ret;
  26         struct udevice *qfw_dev;
  27
  28         ret = qfw_get_dev(&qfw_dev);
  29         if (ret)
  30                 return ret;
  31
  32         return qfw_online_cpus(qfw_dev);
  33 }
  34
  35 static const struct cpu_ops cpu_qemu_ops = {
  36         .get_desc       = cpu_qemu_get_desc,
  37         .get_count      = cpu_qemu_get_count,
  38 };
  39
  40 static const struct udevice_id cpu_qemu_ids[] = {
  41         { .compatible = "cpu-qemu" },
  42         { }
  43 };
  44
  45 U_BOOT_DRIVER(cpu_qemu_drv) = {
  46         .name           = "cpu_qemu",
  47         .id             = UCLASS_CPU,
  48         .of_match       = cpu_qemu_ids,
  49         .ops            = &cpu_qemu_ops,
  50 };