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
139
140
|
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c) 2015 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*/
#ifndef __CPU_H
#define __CPU_H
/**
* struct cpu_platdata - platform data for a CPU
* @cpu_id: Platform-specific way of identifying the CPU.
* @ucode_version: Microcode version, if CPU_FEAT_UCODE is set
* @device_id: Driver-defined device identifier
* @family: DMTF CPU Family identifier
* @id: DMTF CPU Processor identifier
* @timebase_freq: the current frequency at which the cpu timer timebase
* registers are updated (in Hz)
*
* This can be accessed with dev_get_parent_platdata() for any UCLASS_CPU
* device.
*/
struct cpu_platdata {
int cpu_id;
int ucode_version;
ulong device_id;
u16 family;
u32 id[2];
u32 timebase_freq;
};
/* CPU features - mostly just a placeholder for now */
enum {
CPU_FEAT_L1_CACHE = 0, /* Supports level 1 cache */
CPU_FEAT_MMU = 1, /* Supports virtual memory */
CPU_FEAT_UCODE = 2, /* Requires/uses microcode */
CPU_FEAT_DEVICE_ID = 3, /* Provides a device ID */
CPU_FEAT_COUNT,
};
/**
* struct cpu_info - Information about a CPU
*
* @cpu_freq: Current CPU frequency in Hz
* @features: Flags for supported CPU features
* @address_width: Width of the CPU address space in bits (e.g. 32)
*/
struct cpu_info {
ulong cpu_freq;
ulong features;
uint address_width;
};
struct cpu_ops {
/**
* get_desc() - Get a description string for a CPU
*
* @dev: Device to check (UCLASS_CPU)
* @buf: Buffer to place string
* @size: Size of string space
* @return 0 if OK, -ENOSPC if buffer is too small, other -ve on error
*/
int (*get_desc)(struct udevice *dev, char *buf, int size);
/**
* get_info() - Get information about a CPU
*
* @dev: Device to check (UCLASS_CPU)
* @info: Returns CPU info
* @return 0 if OK, -ve on error
*/
int (*get_info)(struct udevice *dev, struct cpu_info *info);
/**
* get_count() - Get number of CPUs
*
* @dev: Device to check (UCLASS_CPU)
* @return CPU count if OK, -ve on error
*/
int (*get_count)(struct udevice *dev);
/**
* get_vendor() - Get vendor name of a CPU
*
* @dev: Device to check (UCLASS_CPU)
* @buf: Buffer to place string
* @size: Size of string space
* @return 0 if OK, -ENOSPC if buffer is too small, other -ve on error
*/
int (*get_vendor)(struct udevice *dev, char *buf, int size);
};
#define cpu_get_ops(dev) ((struct cpu_ops *)(dev)->driver->ops)
/**
* cpu_get_desc() - Get a description string for a CPU
* @dev: Device to check (UCLASS_CPU)
* @buf: Buffer to place string
* @size: Size of string space
*
* Return: 0 if OK, -ENOSPC if buffer is too small, other -ve on error
*/
int cpu_get_desc(struct udevice *dev, char *buf, int size);
/**
* cpu_get_info() - Get information about a CPU
* @dev: Device to check (UCLASS_CPU)
* @info: Returns CPU info
*
* Return: 0 if OK, -ve on error
*/
int cpu_get_info(struct udevice *dev, struct cpu_info *info);
/**
* cpu_get_count() - Get number of CPUs
* @dev: Device to check (UCLASS_CPU)
*
* Return: CPU count if OK, -ve on error
*/
int cpu_get_count(struct udevice *dev);
/**
* cpu_get_vendor() - Get vendor name of a CPU
* @dev: Device to check (UCLASS_CPU)
* @buf: Buffer to place string
* @size: Size of string space
*
* Return: 0 if OK, -ENOSPC if buffer is too small, other -ve on error
*/
int cpu_get_vendor(struct udevice *dev, char *buf, int size);
/**
* cpu_probe_all() - Probe all available CPUs
*
* Return: 0 if OK, -ve on error
*/
int cpu_probe_all(void);
#endif
|
