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 #ifndef _MACHINE_TLS_H_ 32 #define _MACHINE_TLS_H_ 33 34 #include <sys/_tls_variant_i.h> 35 36 #define TLS_DTV_OFFSET 0 37 #define TLS_TCB_ALIGN 16 38 #define TLS_TP_OFFSET 0 39 40 static __inline void 41 _tcb_set(struct tcb *tcb) 42 { 43 __asm __volatile("msr tpidr_el0, %x0" :: "r" (tcb)); 44 } 45 46 static __inline struct tcb * 47 _tcb_get(void) 48 { 49 struct tcb *tcb; 50 51 __asm __volatile("mrs %x0, tpidr_el0" : "=r" (tcb)); 52 return (tcb); 53 } 54 55 #endif /* !_MACHINE_TLS_H_ */ 56