1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2015 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*/
#include <common.h>
#include <cpu.h>
#include <dm.h>
#include <errno.h>
#include <dm/lists.h>
#include <dm/root.h>
#include <linux/err.h>
int cpu_probe_all(void)
{
struct udevice *cpu;
int ret;
ret = uclass_first_device(UCLASS_CPU, &cpu);
if (ret) {
debug("%s: No CPU found (err = %d)\n", __func__, ret);
return ret;
}
while (cpu) {
ret = uclass_next_device(&cpu);
if (ret) {
debug("%s: Error while probing CPU (err = %d)\n",
__func__, ret);
return ret;
}
}
return 0;
}
int cpu_is_current(struct udevice *cpu)
{
struct cpu_ops *ops = cpu_get_ops(cpu);
if (ops->is_current) {
if (ops->is_current(cpu))
return 1;
}
return -ENOSYS;
}
struct udevice *cpu_get_current_dev(void)
{
struct udevice *cpu;
int ret;
uclass_foreach_dev_probe(UCLASS_CPU, cpu) {
if (cpu_is_current(cpu) > 0)
return cpu;
}
/* If can't find current cpu device, use the first dev instead */
ret = uclass_first_device_err(UCLASS_CPU, &cpu);
if (ret) {
debug("%s: Could not get CPU device (err = %d)\n",
__func__, ret);
return NULL;
}
return cpu;
}
int cpu_get_desc(struct udevice *dev, char *buf, int size)
{
struct cpu_ops *ops = cpu_get_ops(dev);
if (!ops->get_desc)
return -ENOSYS;
return ops->get_desc(dev, buf, size);
}
int cpu_get_info(struct udevice *dev, struct cpu_info *info)
{
struct cpu_ops *ops = cpu_get_ops(dev);
if (!ops->get_info)
return -ENOSYS;
return ops->get_info(dev, info);
}
int cpu_get_count(struct udevice *dev)
{
struct cpu_ops *ops = cpu_get_ops(dev);
if (!ops->get_count)
return -ENOSYS;
return ops->get_count(dev);
}
int cpu_get_vendor(struct udevice *dev, char *buf, int size)
{
struct cpu_ops *ops = cpu_get_ops(dev);
if (!ops->get_vendor)
return -ENOSYS;
return ops->get_vendor(dev, buf, size);
}
U_BOOT_DRIVER(cpu_bus) = {
.name = "cpu_bus",
.id = UCLASS_SIMPLE_BUS,
.per_child_platdata_auto_alloc_size = sizeof(struct cpu_platdata),
};
static int uclass_cpu_init(struct uclass *uc)
{
struct udevice *dev;
ofnode node;
int ret;
node = ofnode_path("/cpus");
if (!ofnode_valid(node))
return 0;
ret = device_bind_driver_to_node(dm_root(), "cpu_bus", "cpus", node,
&dev);
return ret;
}
UCLASS_DRIVER(cpu) = {
.id = UCLASS_CPU,
.name = "cpu",
.flags = DM_UC_FLAG_SEQ_ALIAS,
.init = uclass_cpu_init,
};
|
