1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright 2004 by Peter Grehan. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 22 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 24 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32 /* 33 * Machine-dependent thread prototypes/definitions. 34 */ 35 #ifndef _PTHREAD_MD_H_ 36 #define _PTHREAD_MD_H_ 37 38 #include <stddef.h> 39 #include <sys/types.h> 40 41 #define CPU_SPINWAIT 42 43 #define DTV_OFFSET offsetof(struct tcb, tcb_dtv) 44 #ifdef __powerpc64__ 45 #define TP_OFFSET 0x7010 46 #else 47 #define TP_OFFSET 0x7008 48 #endif 49 50 /* 51 * Variant I tcb. The structure layout is fixed, don't blindly 52 * change it. 53 * %r2 (32-bit) or %r13 (64-bit) points to end of the structure. 54 */ 55 struct tcb { 56 void *tcb_dtv; 57 struct pthread *tcb_thread; 58 }; 59 60 static __inline void 61 _tcb_set(struct tcb *tcb) 62 { 63 #ifdef __powerpc64__ 64 __asm __volatile("mr 13,%0" :: 65 "r"((uint8_t *)tcb + TP_OFFSET)); 66 #else 67 __asm __volatile("mr 2,%0" :: 68 "r"((uint8_t *)tcb + TP_OFFSET)); 69 #endif 70 } 71 72 static __inline struct tcb * 73 _tcb_get(void) 74 { 75 register struct tcb *tcb; 76 77 #ifdef __powerpc64__ 78 __asm __volatile("addi %0,13,%1" : "=r"(tcb) : "i"(-TP_OFFSET)); 79 #else 80 __asm __volatile("addi %0,2,%1" : "=r"(tcb) : "i"(-TP_OFFSET)); 81 #endif 82 83 return (tcb); 84 } 85 86 static __inline struct pthread * 87 _get_curthread(void) 88 { 89 if (_thr_initial) 90 return (_tcb_get()->tcb_thread); 91 return (NULL); 92 } 93 94 #define HAS__UMTX_OP_ERR 1 95 96 #endif /* _PTHREAD_MD_H_ */ 97