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/*-
* Copyright (c) 2005 David Xu <davidxu@freebsd.org>
* Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
* All rights reserved.
*
* Portions of this software were developed by SRI International and the
* University of Cambridge Computer Laboratory under DARPA/AFRL contract
* FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme.
*
* Portions of this software were developed by the University of Cambridge
* Computer Laboratory as part of the CTSRD Project, with support from the
* UK Higher Education Innovation Fund (HEIF).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
/*
* Machine-dependent thread prototypes/definitions.
*/
#ifndef _PTHREAD_MD_H_
#define _PTHREAD_MD_H_
#include <sys/types.h>
#include <stddef.h>
#define CPU_SPINWAIT
#define DTV_OFFSET offsetof(struct tcb, tcb_dtv)
#define TP_OFFSET sizeof(struct tcb)
/*
* Variant I tcb. The structure layout is fixed, don't blindly
* change it!
*/
struct tcb {
void *tcb_dtv;
struct pthread *tcb_thread;
};
/* Called from the thread to set its private data. */
static __inline void
_tcb_set(struct tcb *tcb)
{
__asm __volatile("mv tp, %0" :: "r"((uint8_t *)tcb + TP_OFFSET));
}
/*
* Get the current tcb.
*/
static __inline struct tcb *
_tcb_get(void)
{
register uint8_t *_tp;
__asm __volatile("mv %0, tp" : "=r"(_tp));
return ((struct tcb *)(_tp - TP_OFFSET));
}
extern struct pthread *_thr_initial;
static __inline struct pthread *
_get_curthread(void)
{
if (_thr_initial)
return (_tcb_get()->tcb_thread);
return (NULL);
}
#endif /* _PTHREAD_MD_H_ */
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