blob: cbb4419ec0cfd9c86be2842fb4bbd72fcbbd122e [file] [log] [blame]
Tom Rini10e47792018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
Simon Glass131a6452015-04-28 20:25:09 -06002/*
3 * Copyright (C) 2015 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
Simon Glass131a6452015-04-28 20:25:09 -06005 */
6
7#include <common.h>
8#include <cpu.h>
9#include <dm.h>
Bin Mengb891f782015-06-12 14:52:18 +080010#include <errno.h>
Simon Glass0f2af882020-05-10 11:40:05 -060011#include <log.h>
Simon Glass131a6452015-04-28 20:25:09 -060012#include <dm/lists.h>
13#include <dm/root.h>
Peng Fan221763a2020-05-03 21:58:47 +080014#include <linux/err.h>
Simon Glass131a6452015-04-28 20:25:09 -060015
Mario Six0263b432018-08-06 10:23:43 +020016int cpu_probe_all(void)
17{
18 struct udevice *cpu;
19 int ret;
20
21 ret = uclass_first_device(UCLASS_CPU, &cpu);
22 if (ret) {
23 debug("%s: No CPU found (err = %d)\n", __func__, ret);
24 return ret;
25 }
26
27 while (cpu) {
28 ret = uclass_next_device(&cpu);
29 if (ret) {
30 debug("%s: Error while probing CPU (err = %d)\n",
31 __func__, ret);
32 return ret;
33 }
34 }
35
36 return 0;
37}
38
Peng Fan221763a2020-05-03 21:58:47 +080039int cpu_is_current(struct udevice *cpu)
40{
41 struct cpu_ops *ops = cpu_get_ops(cpu);
42
43 if (ops->is_current) {
44 if (ops->is_current(cpu))
45 return 1;
46 }
47
48 return -ENOSYS;
49}
50
51struct udevice *cpu_get_current_dev(void)
52{
53 struct udevice *cpu;
54 int ret;
55
56 uclass_foreach_dev_probe(UCLASS_CPU, cpu) {
57 if (cpu_is_current(cpu) > 0)
58 return cpu;
59 }
60
61 /* If can't find current cpu device, use the first dev instead */
62 ret = uclass_first_device_err(UCLASS_CPU, &cpu);
63 if (ret) {
64 debug("%s: Could not get CPU device (err = %d)\n",
65 __func__, ret);
66 return NULL;
67 }
68
69 return cpu;
70}
71
Simon Glass131a6452015-04-28 20:25:09 -060072int cpu_get_desc(struct udevice *dev, char *buf, int size)
73{
74 struct cpu_ops *ops = cpu_get_ops(dev);
75
76 if (!ops->get_desc)
77 return -ENOSYS;
78
79 return ops->get_desc(dev, buf, size);
80}
81
82int cpu_get_info(struct udevice *dev, struct cpu_info *info)
83{
84 struct cpu_ops *ops = cpu_get_ops(dev);
85
Bin Meng6e02ec82015-06-12 14:52:19 +080086 if (!ops->get_info)
Simon Glass131a6452015-04-28 20:25:09 -060087 return -ENOSYS;
88
Sagar Shrikant Kadamce0d69a2020-06-28 07:45:01 -070089 /* Init cpu_info to 0 */
90 memset(info, 0, sizeof(struct cpu_info));
91
Simon Glass131a6452015-04-28 20:25:09 -060092 return ops->get_info(dev, info);
93}
94
Bin Mengd13b0142015-06-17 11:15:34 +080095int cpu_get_count(struct udevice *dev)
96{
97 struct cpu_ops *ops = cpu_get_ops(dev);
98
99 if (!ops->get_count)
100 return -ENOSYS;
101
102 return ops->get_count(dev);
103}
104
Alexander Graf67f66bd2016-08-19 01:23:27 +0200105int cpu_get_vendor(struct udevice *dev, char *buf, int size)
106{
107 struct cpu_ops *ops = cpu_get_ops(dev);
108
109 if (!ops->get_vendor)
110 return -ENOSYS;
111
112 return ops->get_vendor(dev, buf, size);
113}
114
Simon Glass131a6452015-04-28 20:25:09 -0600115U_BOOT_DRIVER(cpu_bus) = {
116 .name = "cpu_bus",
117 .id = UCLASS_SIMPLE_BUS,
118 .per_child_platdata_auto_alloc_size = sizeof(struct cpu_platdata),
119};
120
121static int uclass_cpu_init(struct uclass *uc)
122{
123 struct udevice *dev;
Simon Glasse6dd8da2017-05-18 20:09:07 -0600124 ofnode node;
Simon Glass131a6452015-04-28 20:25:09 -0600125 int ret;
126
Simon Glasse6dd8da2017-05-18 20:09:07 -0600127 node = ofnode_path("/cpus");
128 if (!ofnode_valid(node))
Simon Glass131a6452015-04-28 20:25:09 -0600129 return 0;
130
131 ret = device_bind_driver_to_node(dm_root(), "cpu_bus", "cpus", node,
132 &dev);
133
134 return ret;
135}
136
137UCLASS_DRIVER(cpu) = {
138 .id = UCLASS_CPU,
139 .name = "cpu",
140 .flags = DM_UC_FLAG_SEQ_ALIAS,
141 .init = uclass_cpu_init,
142};