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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 <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_platdata *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_platdata(dev);
plat->cpu_id = cpu_num;
}
return 0;
}
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