1a091d823SDavid Xu /*- 2*5e53a4f9SPedro F. Giffuni * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3*5e53a4f9SPedro F. Giffuni * 4a091d823SDavid Xu * Copyright (c) 2005 David Xu <davidxu@freebsd.org>. 5a091d823SDavid Xu * All rights reserved. 6a091d823SDavid Xu * 7a091d823SDavid Xu * Redistribution and use in source and binary forms, with or without 8a091d823SDavid Xu * modification, are permitted provided that the following conditions 9a091d823SDavid Xu * are met: 10a091d823SDavid Xu * 11a091d823SDavid Xu * 1. Redistributions of source code must retain the above copyright 12a091d823SDavid Xu * notice, this list of conditions and the following disclaimer. 13a091d823SDavid Xu * 2. Redistributions in binary form must reproduce the above copyright 14a091d823SDavid Xu * notice, this list of conditions and the following disclaimer in the 15a091d823SDavid Xu * documentation and/or other materials provided with the distribution. 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, BUT 22a091d823SDavid Xu * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23a091d823SDavid Xu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24a091d823SDavid Xu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25a091d823SDavid Xu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26a091d823SDavid Xu * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27a091d823SDavid Xu * 28a091d823SDavid Xu * $FreeBSD$ 29a091d823SDavid Xu */ 30a091d823SDavid Xu 31a091d823SDavid Xu /* 32a091d823SDavid Xu * Machine-dependent thread prototypes/definitions. 33a091d823SDavid Xu */ 34a091d823SDavid Xu #ifndef _PTHREAD_MD_H_ 35a091d823SDavid Xu #define _PTHREAD_MD_H_ 36a091d823SDavid Xu 37a091d823SDavid Xu #include <sys/types.h> 38a091d823SDavid Xu #include <machine/sysarch.h> 39a091d823SDavid Xu #include <stddef.h> 40a091d823SDavid Xu 41d99f6dacSDavid Xu #define CPU_SPINWAIT 42a091d823SDavid Xu #define DTV_OFFSET offsetof(struct tcb, tcb_dtv) 43a091d823SDavid Xu 44a091d823SDavid Xu /* 45f879eb04SMichal Meloun * Variant I tcb. The structure layout is fixed, don't blindly 46f879eb04SMichal Meloun * change it. 47a091d823SDavid Xu */ 48a091d823SDavid Xu struct tcb { 49a091d823SDavid Xu void *tcb_dtv; /* required by rtld */ 50a091d823SDavid Xu struct pthread *tcb_thread; /* our hook */ 51a091d823SDavid Xu }; 52a091d823SDavid Xu 53a091d823SDavid Xu /* Called from the thread to set its private data. */ 54a091d823SDavid Xu static __inline void 55a091d823SDavid Xu _tcb_set(struct tcb *tcb) 56a091d823SDavid Xu { 5789e757feSOleksandr Tymoshenko #ifdef ARM_TP_ADDRESS 5889e757feSOleksandr Tymoshenko *((struct tcb **)ARM_TP_ADDRESS) = tcb; /* avoids a system call */ 5989e757feSOleksandr Tymoshenko #else 6089e757feSOleksandr Tymoshenko sysarch(ARM_SET_TP, tcb); 6189e757feSOleksandr Tymoshenko #endif 62a091d823SDavid Xu } 63a091d823SDavid Xu 64a091d823SDavid Xu /* 65a091d823SDavid Xu * Get the current tcb. 66a091d823SDavid Xu */ 67a091d823SDavid Xu static __inline struct tcb * 68a091d823SDavid Xu _tcb_get(void) 69a091d823SDavid Xu { 7089e757feSOleksandr Tymoshenko #ifdef ARM_TP_ADDRESS 71a091d823SDavid Xu return (*((struct tcb **)ARM_TP_ADDRESS)); 7289e757feSOleksandr Tymoshenko #else 7389e757feSOleksandr Tymoshenko struct tcb *tcb; 7489e757feSOleksandr Tymoshenko 7589e757feSOleksandr Tymoshenko __asm __volatile("mrc p15, 0, %0, c13, c0, 3" \ 7689e757feSOleksandr Tymoshenko : "=r" (tcb)); 7789e757feSOleksandr Tymoshenko return (tcb); 7889e757feSOleksandr Tymoshenko #endif 79a091d823SDavid Xu } 80a091d823SDavid Xu 81a091d823SDavid Xu static __inline struct pthread * 82a091d823SDavid Xu _get_curthread(void) 83a091d823SDavid Xu { 84a091d823SDavid Xu if (_thr_initial) 85a091d823SDavid Xu return (_tcb_get()->tcb_thread); 86a091d823SDavid Xu return (NULL); 87a091d823SDavid Xu } 88a091d823SDavid Xu 89a091d823SDavid Xu #endif /* _PTHREAD_MD_H_ */ 90