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
|
/* $OpenBSD: tcb.h,v 1.2 2017/01/10 13:13:12 patrick Exp $ */
/*
* Copyright (c) 2011 Philip Guenther <guenther@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _MACHINE_TCB_H_
#define _MACHINE_TCB_H_
#ifdef _KERNEL
#include <machine/pcb.h>
static inline void
__aarch64_set_tcb(void *tcb)
{
__asm volatile("msr tpidr_el0, %x0" : : "r" (tcb));
}
#define TCB_GET(p) \
((struct pcb *)(p)->p_addr)->pcb_tcb
#define TCB_SET(p, addr) \
do { \
((struct pcb *)(p)->p_addr)->pcb_tcb = (addr); \
__aarch64_set_tcb(addr); \
} while (0)
#else /* _KERNEL */
/* ELF TLS ABI calls for small TCB, with static TLS data after it */
#define TLS_VARIANT 1
static inline void *
__aarch64_read_tcb(void)
{
void *tcb;
__asm volatile("mrs %x0, tpidr_el0": "=r" (tcb));
return tcb;
}
#define TCB_GET() __aarch64_read_tcb()
#endif /* _KERNEL */
#endif /* _MACHINE_TCB_H_ */
|
