1*5e53a4f9SPedro F. Giffuni /*- 2*5e53a4f9SPedro F. Giffuni * SPDX-License-Identifier: BSD-3-Clause 3*5e53a4f9SPedro F. Giffuni * 4a091d823SDavid Xu * Copyright 2004 by Peter Grehan. All rights reserved. 5a091d823SDavid Xu * 6a091d823SDavid Xu * Redistribution and use in source and binary forms, with or without 7a091d823SDavid Xu * modification, are permitted provided that the following conditions 8a091d823SDavid Xu * are met: 9a091d823SDavid Xu * 1. Redistributions of source code must retain the above copyright 10a091d823SDavid Xu * notice, this list of conditions and the following disclaimer. 11a091d823SDavid Xu * 2. Redistributions in binary form must reproduce the above copyright 12a091d823SDavid Xu * notice, this list of conditions and the following disclaimer in the 13a091d823SDavid Xu * documentation and/or other materials provided with the distribution. 14a091d823SDavid Xu * 3. The name of the author may not be used to endorse or promote products 15a091d823SDavid Xu * derived from this software without specific prior written permission. 16a091d823SDavid Xu * 17a091d823SDavid Xu * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18a091d823SDavid Xu * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19a091d823SDavid Xu * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20a091d823SDavid Xu * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21a091d823SDavid Xu * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 22a091d823SDavid Xu * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23a091d823SDavid Xu * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 24a091d823SDavid Xu * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 25a091d823SDavid Xu * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26a091d823SDavid Xu * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27a091d823SDavid Xu * SUCH DAMAGE. 28a091d823SDavid Xu * 29a091d823SDavid Xu * $FreeBSD$ 30a091d823SDavid Xu */ 31a091d823SDavid Xu 32a091d823SDavid Xu /* 33a091d823SDavid Xu * Machine-dependent thread prototypes/definitions. 34a091d823SDavid Xu */ 35a091d823SDavid Xu #ifndef _PTHREAD_MD_H_ 36a091d823SDavid Xu #define _PTHREAD_MD_H_ 37a091d823SDavid Xu 38a091d823SDavid Xu #include <stddef.h> 39a091d823SDavid Xu #include <sys/types.h> 40a091d823SDavid Xu 41d99f6dacSDavid Xu #define CPU_SPINWAIT 42d99f6dacSDavid Xu 43a091d823SDavid Xu #define DTV_OFFSET offsetof(struct tcb, tcb_dtv) 44f4fbf9c8SNathan Whitehorn #ifdef __powerpc64__ 45f4fbf9c8SNathan Whitehorn #define TP_OFFSET 0x7010 46f4fbf9c8SNathan Whitehorn #else 47cc79b334SMarcel Moolenaar #define TP_OFFSET 0x7008 48f4fbf9c8SNathan Whitehorn #endif 49a091d823SDavid Xu 50a091d823SDavid Xu /* 51a091d823SDavid Xu * Variant I tcb. The structure layout is fixed, don't blindly 52a091d823SDavid Xu * change it. 53f4fbf9c8SNathan Whitehorn * %r2 (32-bit) or %r13 (64-bit) points to end of the structure. 54a091d823SDavid Xu */ 55a091d823SDavid Xu struct tcb { 56a091d823SDavid Xu void *tcb_dtv; 57a091d823SDavid Xu struct pthread *tcb_thread; 58a091d823SDavid Xu }; 59a091d823SDavid Xu 60a091d823SDavid Xu static __inline void 61a091d823SDavid Xu _tcb_set(struct tcb *tcb) 62a091d823SDavid Xu { 63f4fbf9c8SNathan Whitehorn #ifdef __powerpc64__ 6485eda151SJustin Hibbits __asm __volatile("mr 13,%0" :: 65cc79b334SMarcel Moolenaar "r"((uint8_t *)tcb + TP_OFFSET)); 6685eda151SJustin Hibbits #else 6785eda151SJustin Hibbits __asm __volatile("mr 2,%0" :: 6885eda151SJustin Hibbits "r"((uint8_t *)tcb + TP_OFFSET)); 6985eda151SJustin Hibbits #endif 70a091d823SDavid Xu } 71a091d823SDavid Xu 72a091d823SDavid Xu static __inline struct tcb * 73a091d823SDavid Xu _tcb_get(void) 74a091d823SDavid Xu { 7585eda151SJustin Hibbits register uint8_t *_tp; 76f4fbf9c8SNathan Whitehorn #ifdef __powerpc64__ 7785eda151SJustin Hibbits __asm __volatile("mr %0,13" : "=r"(_tp)); 78f4fbf9c8SNathan Whitehorn #else 7985eda151SJustin Hibbits __asm __volatile("mr %0,2" : "=r"(_tp)); 80f4fbf9c8SNathan Whitehorn #endif 818e61dbecSMarcel Moolenaar 82cc79b334SMarcel Moolenaar return ((struct tcb *)(_tp - TP_OFFSET)); 83a091d823SDavid Xu } 84a091d823SDavid Xu 85a091d823SDavid Xu static __inline struct pthread * 86a091d823SDavid Xu _get_curthread(void) 87a091d823SDavid Xu { 88a091d823SDavid Xu if (_thr_initial) 898e61dbecSMarcel Moolenaar return (_tcb_get()->tcb_thread); 90a091d823SDavid Xu return (NULL); 91a091d823SDavid Xu } 92a091d823SDavid Xu 93a091d823SDavid Xu #endif /* _PTHREAD_MD_H_ */ 94