1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * (C) Copyright 2018
4 * Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc
5 */
6
7#include <common.h>
8#include <dm.h>
9#include <cpu.h>
10
11static int cpu_sandbox_get_desc(const struct udevice *dev, char *buf, int size)
12{
13	snprintf(buf, size, "LEG Inc. SuperMegaUltraTurbo CPU No. 1");
14
15	return 0;
16}
17
18static int cpu_sandbox_get_info(const struct udevice *dev,
19				struct cpu_info *info)
20{
21	info->cpu_freq = 42 * 42 * 42 * 42 * 42;
22	info->features = 0x42424242;
23	info->address_width = IS_ENABLED(CONFIG_PHYS_64BIT) ? 64 : 32;
24
25	return 0;
26}
27
28static int cpu_sandbox_get_count(const struct udevice *dev)
29{
30	return 42;
31}
32
33static int cpu_sandbox_get_vendor(const struct udevice *dev, char *buf,
34				  int size)
35{
36	snprintf(buf, size, "Languid Example Garbage Inc.");
37
38	return 0;
39}
40
41static const char *cpu_current = "cpu@1";
42
43void cpu_sandbox_set_current(const char *name)
44{
45	cpu_current = name;
46}
47
48static int cpu_sandbox_is_current(struct udevice *dev)
49{
50	if (!strcmp(dev->name, cpu_current))
51		return 1;
52
53	return 0;
54}
55
56static const struct cpu_ops cpu_sandbox_ops = {
57	.get_desc = cpu_sandbox_get_desc,
58	.get_info = cpu_sandbox_get_info,
59	.get_count = cpu_sandbox_get_count,
60	.get_vendor = cpu_sandbox_get_vendor,
61	.is_current = cpu_sandbox_is_current,
62};
63
64static int cpu_sandbox_bind(struct udevice *dev)
65{
66	int ret;
67	struct cpu_plat *plat = dev_get_parent_plat(dev);
68
69	/* first examine the property in current cpu node */
70	ret = dev_read_u32(dev, "timebase-frequency", &plat->timebase_freq);
71	/* if not found, then look at the parent /cpus node */
72	if (ret)
73		ret = dev_read_u32(dev->parent, "timebase-frequency",
74				   &plat->timebase_freq);
75
76	return ret;
77}
78
79static int cpu_sandbox_probe(struct udevice *dev)
80{
81	return 0;
82}
83
84static const struct udevice_id cpu_sandbox_ids[] = {
85	{ .compatible = "sandbox,cpu_sandbox" },
86	{ }
87};
88
89U_BOOT_DRIVER(cpu_sandbox) = {
90	.name           = "cpu_sandbox",
91	.id             = UCLASS_CPU,
92	.ops		= &cpu_sandbox_ops,
93	.of_match       = cpu_sandbox_ids,
94	.bind		= cpu_sandbox_bind,
95	.probe          = cpu_sandbox_probe,
96};
97