1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2015 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
5 */
6
7 #include <common.h>
8 #include <cpu.h>
9 #include <dm.h>
10 #include <errno.h>
11 #include <dm/lists.h>
12 #include <dm/root.h>
13
cpu_probe_all(void)14 int cpu_probe_all(void)
15 {
16 struct udevice *cpu;
17 int ret;
18
19 ret = uclass_first_device(UCLASS_CPU, &cpu);
20 if (ret) {
21 debug("%s: No CPU found (err = %d)\n", __func__, ret);
22 return ret;
23 }
24
25 while (cpu) {
26 ret = uclass_next_device(&cpu);
27 if (ret) {
28 debug("%s: Error while probing CPU (err = %d)\n",
29 __func__, ret);
30 return ret;
31 }
32 }
33
34 return 0;
35 }
36
cpu_get_desc(struct udevice * dev,char * buf,int size)37 int cpu_get_desc(struct udevice *dev, char *buf, int size)
38 {
39 struct cpu_ops *ops = cpu_get_ops(dev);
40
41 if (!ops->get_desc)
42 return -ENOSYS;
43
44 return ops->get_desc(dev, buf, size);
45 }
46
cpu_get_info(struct udevice * dev,struct cpu_info * info)47 int cpu_get_info(struct udevice *dev, struct cpu_info *info)
48 {
49 struct cpu_ops *ops = cpu_get_ops(dev);
50
51 if (!ops->get_info)
52 return -ENOSYS;
53
54 return ops->get_info(dev, info);
55 }
56
cpu_get_count(struct udevice * dev)57 int cpu_get_count(struct udevice *dev)
58 {
59 struct cpu_ops *ops = cpu_get_ops(dev);
60
61 if (!ops->get_count)
62 return -ENOSYS;
63
64 return ops->get_count(dev);
65 }
66
cpu_get_vendor(struct udevice * dev,char * buf,int size)67 int cpu_get_vendor(struct udevice *dev, char *buf, int size)
68 {
69 struct cpu_ops *ops = cpu_get_ops(dev);
70
71 if (!ops->get_vendor)
72 return -ENOSYS;
73
74 return ops->get_vendor(dev, buf, size);
75 }
76
77 U_BOOT_DRIVER(cpu_bus) = {
78 .name = "cpu_bus",
79 .id = UCLASS_SIMPLE_BUS,
80 .per_child_platdata_auto_alloc_size = sizeof(struct cpu_platdata),
81 };
82
uclass_cpu_init(struct uclass * uc)83 static int uclass_cpu_init(struct uclass *uc)
84 {
85 struct udevice *dev;
86 ofnode node;
87 int ret;
88
89 node = ofnode_path("/cpus");
90 if (!ofnode_valid(node))
91 return 0;
92
93 ret = device_bind_driver_to_node(dm_root(), "cpu_bus", "cpus", node,
94 &dev);
95
96 return ret;
97 }
98
99 UCLASS_DRIVER(cpu) = {
100 .id = UCLASS_CPU,
101 .name = "cpu",
102 .flags = DM_UC_FLAG_SEQ_ALIAS,
103 .init = uclass_cpu_init,
104 };
105