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author | Ruslan Bukin <br@FreeBSD.org> | 2016-01-27 14:10:50 +0000 |
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committer | Ruslan Bukin <br@FreeBSD.org> | 2016-01-27 14:10:50 +0000 |
commit | 3d32f0f6e597fa16b20d40514b3a0f5022ae6780 (patch) | |
tree | f34d94d4c5b239387a6f9294fd6442659a2d36b2 /lib | |
parent | c4cd1fa410baf09310c733e07c7a9bfd31a47bbf (diff) | |
download | src-3d32f0f6e597fa16b20d40514b3a0f5022ae6780.tar.gz src-3d32f0f6e597fa16b20d40514b3a0f5022ae6780.zip |
Add pthread MD part for RISC-V.
Reviewed by: andrew
Sponsored by: DARPA, AFRL
Sponsored by: HEIF5
Differential Revision: https://reviews.freebsd.org/D5063
Notes
Notes:
svn path=/head/; revision=294912
Diffstat (limited to 'lib')
-rw-r--r-- | lib/libthr/arch/riscv/include/pthread_md.h | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/lib/libthr/arch/riscv/include/pthread_md.h b/lib/libthr/arch/riscv/include/pthread_md.h new file mode 100644 index 000000000000..86eccc15e0eb --- /dev/null +++ b/lib/libthr/arch/riscv/include/pthread_md.h @@ -0,0 +1,92 @@ +/*- + * 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 0x10 + +/* + * 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_ */ |