1*a7dfee7aSAndrew Turner /*- 2*a7dfee7aSAndrew Turner * Copyright (c) 2005 David Xu <davidxu@freebsd.org>. 3*a7dfee7aSAndrew Turner * Copyright (c) 2014 the FreeBSD Foundation 4*a7dfee7aSAndrew Turner * All rights reserved. 5*a7dfee7aSAndrew Turner * 6*a7dfee7aSAndrew Turner * Portions of this software were developed by Andrew Turner 7*a7dfee7aSAndrew Turner * under sponsorship from the FreeBSD Foundation 8*a7dfee7aSAndrew Turner * 9*a7dfee7aSAndrew Turner * Redistribution and use in source and binary forms, with or without 10*a7dfee7aSAndrew Turner * modification, are permitted provided that the following conditions 11*a7dfee7aSAndrew Turner * are met: 12*a7dfee7aSAndrew Turner * 13*a7dfee7aSAndrew Turner * 1. Redistributions of source code must retain the above copyright 14*a7dfee7aSAndrew Turner * notice, this list of conditions and the following disclaimer. 15*a7dfee7aSAndrew Turner * 2. Redistributions in binary form must reproduce the above copyright 16*a7dfee7aSAndrew Turner * notice, this list of conditions and the following disclaimer in the 17*a7dfee7aSAndrew Turner * documentation and/or other materials provided with the distribution. 18*a7dfee7aSAndrew Turner * 19*a7dfee7aSAndrew Turner * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20*a7dfee7aSAndrew Turner * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21*a7dfee7aSAndrew Turner * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22*a7dfee7aSAndrew Turner * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23*a7dfee7aSAndrew Turner * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24*a7dfee7aSAndrew Turner * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25*a7dfee7aSAndrew Turner * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26*a7dfee7aSAndrew Turner * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27*a7dfee7aSAndrew Turner * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28*a7dfee7aSAndrew Turner * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29*a7dfee7aSAndrew Turner * 30*a7dfee7aSAndrew Turner * $FreeBSD$ 31*a7dfee7aSAndrew Turner */ 32*a7dfee7aSAndrew Turner 33*a7dfee7aSAndrew Turner /* 34*a7dfee7aSAndrew Turner * Machine-dependent thread prototypes/definitions. 35*a7dfee7aSAndrew Turner */ 36*a7dfee7aSAndrew Turner #ifndef _PTHREAD_MD_H_ 37*a7dfee7aSAndrew Turner #define _PTHREAD_MD_H_ 38*a7dfee7aSAndrew Turner 39*a7dfee7aSAndrew Turner #include <sys/types.h> 40*a7dfee7aSAndrew Turner #include <machine/sysarch.h> 41*a7dfee7aSAndrew Turner #include <stddef.h> 42*a7dfee7aSAndrew Turner 43*a7dfee7aSAndrew Turner #define CPU_SPINWAIT 44*a7dfee7aSAndrew Turner #define DTV_OFFSET offsetof(struct tcb, tcb_dtv) 45*a7dfee7aSAndrew Turner 46*a7dfee7aSAndrew Turner /* 47*a7dfee7aSAndrew Turner * Variant I tcb. The structure layout is fixed, don't blindly 48*a7dfee7aSAndrew Turner * change it. 49*a7dfee7aSAndrew Turner */ 50*a7dfee7aSAndrew Turner struct tcb { 51*a7dfee7aSAndrew Turner void *tcb_dtv; 52*a7dfee7aSAndrew Turner struct pthread *tcb_thread; 53*a7dfee7aSAndrew Turner }; 54*a7dfee7aSAndrew Turner 55*a7dfee7aSAndrew Turner /* Called from the thread to set its private data. */ 56*a7dfee7aSAndrew Turner static __inline void 57*a7dfee7aSAndrew Turner _tcb_set(struct tcb *tcb) 58*a7dfee7aSAndrew Turner { 59*a7dfee7aSAndrew Turner 60*a7dfee7aSAndrew Turner __asm __volatile("msr tpidr_el0, %x0" :: "r" (tcb)); 61*a7dfee7aSAndrew Turner } 62*a7dfee7aSAndrew Turner 63*a7dfee7aSAndrew Turner /* 64*a7dfee7aSAndrew Turner * Get the current tcb. 65*a7dfee7aSAndrew Turner */ 66*a7dfee7aSAndrew Turner static __inline struct tcb * 67*a7dfee7aSAndrew Turner _tcb_get(void) 68*a7dfee7aSAndrew Turner { 69*a7dfee7aSAndrew Turner struct tcb *tcb; 70*a7dfee7aSAndrew Turner 71*a7dfee7aSAndrew Turner __asm __volatile("mrs %x0, tpidr_el0" : "=r" (tcb)); 72*a7dfee7aSAndrew Turner return (tcb); 73*a7dfee7aSAndrew Turner } 74*a7dfee7aSAndrew Turner 75*a7dfee7aSAndrew Turner extern struct pthread *_thr_initial; 76*a7dfee7aSAndrew Turner 77*a7dfee7aSAndrew Turner static __inline struct pthread * 78*a7dfee7aSAndrew Turner _get_curthread(void) 79*a7dfee7aSAndrew Turner { 80*a7dfee7aSAndrew Turner 81*a7dfee7aSAndrew Turner return (_tcb_get()->tcb_thread); 82*a7dfee7aSAndrew Turner } 83*a7dfee7aSAndrew Turner 84*a7dfee7aSAndrew Turner #endif /* _PTHREAD_MD_H_ */ 85