blob: 6fd88be2ff0e7dd1dcc0c29aebd1702a81df30c2 (
plain)
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
|
/*
* Userspace implementations of fallback calls
*
* Copyright (C) 2017 Cavium, Inc.
* Copyright (C) 2012 ARM Limited
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Author: Will Deacon <will.deacon@arm.com>
* Rewriten into C by: Andrew Pinski <apinski@cavium.com>
*/
#ifndef __VDSO_COMPILER_H
#define __VDSO_COMPILER_H
#include <asm/arch_timer.h> /* for arch_counter_get_cntvct() */
#include <asm/processor.h> /* for cpu_relax() */
#include <asm/unistd.h>
#include <linux/compiler.h>
#include <linux/hrtimer.h> /* for LOW_RES_NSEC and MONOTONIC_RES_NSEC */
#include <linux/time.h> /* for NSEC_PER_SEC */
#ifndef CONFIG_AEABI
#error This code depends on AEABI system call conventions
#endif
#ifdef CONFIG_ARM_ARCH_TIMER
#define ARCH_PROVIDES_TIMER
#endif
#define DEFINE_FALLBACK(name, type_arg1, name_arg1, type_arg2, name_arg2) \
static notrace long name##_fallback(type_arg1 _##name_arg1, \
type_arg2 _##name_arg2) \
{ \
register type_arg1 name_arg1 asm("r0") = _##name_arg1; \
register type_arg2 name_arg2 asm("r1") = _##name_arg2; \
register long ret asm ("r0"); \
register long nr asm("r7") = __NR_##name; \
\
asm volatile( \
" swi #0\n" \
: "=r" (ret) \
: "r" (name_arg1), "r" (name_arg2), "r" (nr) \
: "memory"); \
\
return ret; \
}
#define arch_vdso_read_counter() arch_counter_get_cntvct()
/* Avoid unresolved references emitted by GCC */
void __aeabi_unwind_cpp_pr0(void)
{
}
void __aeabi_unwind_cpp_pr1(void)
{
}
void __aeabi_unwind_cpp_pr2(void)
{
}
#endif /* __VDSO_COMPILER_H */
|
