5113f6f70
 김현기
kernel add
|
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
|
/*
* Copyright (c) 2013, NVIDIA Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*/
/*
* Support for the Trusted Foundations secure monitor.
*
* Trusted Foundation comes active on some ARM consumer devices (most
* Tegra-based devices sold on the market are concerned). Such devices can only
* perform some basic operations, like setting the CPU reset vector, through
* SMC calls to the secure monitor. The calls are completely specific to
* Trusted Foundations, and do *not* follow the SMC calling convention or the
* PSCI standard.
*/
#ifndef __ASM_ARM_TRUSTED_FOUNDATIONS_H
#define __ASM_ARM_TRUSTED_FOUNDATIONS_H
#include <linux/kconfig.h>
#include <linux/printk.h>
#include <linux/bug.h>
#include <linux/of.h>
#include <linux/cpu.h>
#include <linux/smp.h>
struct trusted_foundations_platform_data {
unsigned int version_major;
unsigned int version_minor;
};
#if IS_ENABLED(CONFIG_TRUSTED_FOUNDATIONS)
void register_trusted_foundations(struct trusted_foundations_platform_data *pd);
void of_register_trusted_foundations(void);
#else /* CONFIG_TRUSTED_FOUNDATIONS */
static inline void register_trusted_foundations(
struct trusted_foundations_platform_data *pd)
{
/*
* If the system requires TF and we cannot provide it, continue booting
* but disable features that cannot be provided.
*/
pr_err("No support for Trusted Foundations, continuing in degraded mode.
");
pr_err("Secondary processors as well as CPU PM will be disabled.
");
#if IS_ENABLED(CONFIG_SMP)
setup_max_cpus = 0;
#endif
cpu_idle_poll_ctrl(true);
}
static inline void of_register_trusted_foundations(void)
{
/*
* If we find the target should enable TF but does not support it,
* fail as the system won't be able to do much anyway
*/
if (of_find_compatible_node(NULL, NULL, "tlm,trusted-foundations"))
register_trusted_foundations(NULL);
}
#endif /* CONFIG_TRUSTED_FOUNDATIONS */
#endif
|