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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (C) 2015 Google, Inc
- */
- #include <common.h>
- #include <cpu.h>
- #include <dm.h>
- #include <malloc.h>
- #include <qfw.h>
- #include <dm/lists.h>
- #include <dm/uclass-internal.h>
- #include <dm/root.h>
- int qemu_cpu_fixup(void)
- {
- int ret;
- int cpu_num;
- int cpu_online;
- struct udevice *dev, *pdev;
- struct cpu_plat *plat;
- char *cpu;
- /* first we need to find '/cpus' */
- for (device_find_first_child(dm_root(), &pdev);
- pdev;
- device_find_next_child(&pdev)) {
- if (!strcmp(pdev->name, "cpus"))
- break;
- }
- if (!pdev) {
- printf("unable to find cpus device\n");
- return -ENODEV;
- }
- /* calculate cpus that are already bound */
- cpu_num = 0;
- for (uclass_find_first_device(UCLASS_CPU, &dev);
- dev;
- uclass_find_next_device(&dev)) {
- cpu_num++;
- }
- /* get actual cpu number */
- cpu_online = qemu_fwcfg_online_cpus();
- if (cpu_online < 0) {
- printf("unable to get online cpu number: %d\n", cpu_online);
- return cpu_online;
- }
- /* bind addtional cpus */
- dev = NULL;
- for (; cpu_num < cpu_online; cpu_num++) {
- /*
- * allocate device name here as device_bind_driver() does
- * not copy device name, 8 bytes are enough for
- * sizeof("cpu@") + 3 digits cpu number + '\0'
- */
- cpu = malloc(8);
- if (!cpu) {
- printf("unable to allocate device name\n");
- return -ENOMEM;
- }
- sprintf(cpu, "cpu@%d", cpu_num);
- ret = device_bind_driver(pdev, "cpu_qemu", cpu, &dev);
- if (ret) {
- printf("binding cpu@%d failed: %d\n", cpu_num, ret);
- return ret;
- }
- plat = dev_get_parent_plat(dev);
- plat->cpu_id = cpu_num;
- }
- return 0;
- }
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