1 /*-
2 * Copyright (c) 2005 David Xu <davidxu@freebsd.org>.
3 * Copyright (c) 2014 the FreeBSD Foundation
4 * All rights reserved.
5 *
6 * Portions of this software were developed by Andrew Turner
7 * under sponsorship from the FreeBSD Foundation
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #ifdef __arm__
32 #include <arm/tls.h>
33 #else /* !__arm__ */
34
35 #ifndef _MACHINE_TLS_H_
36 #define _MACHINE_TLS_H_
37
38 #include <sys/_tls_variant_i.h>
39
40 #define TLS_DTV_OFFSET 0
41 #define TLS_TCB_ALIGN 16
42 #define TLS_TP_OFFSET 0
43
44 static __inline void
_tcb_set(struct tcb * tcb)45 _tcb_set(struct tcb *tcb)
46 {
47 __asm __volatile("msr tpidr_el0, %x0" :: "r" (tcb));
48 }
49
50 static __inline struct tcb *
_tcb_get(void)51 _tcb_get(void)
52 {
53 struct tcb *tcb;
54
55 __asm __volatile("mrs %x0, tpidr_el0" : "=r" (tcb));
56 return (tcb);
57 }
58
59 #endif /* !_MACHINE_TLS_H_ */
60
61 #endif /* !__arm__ */
62