tls.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2012 Oleksandr Tymoshenko
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions, and the following disclaimer,
   12  *    without modification, immediately at the beginning of the file.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in
   15  *    the documentation and/or other materials provided with the
   16  *    distribution.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   21  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
   22  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   28  * SUCH DAMAGE.
   29  *
   30  * $FreeBSD$
   31  * 
   32  */
   33 
   34 #ifndef __MIPS_TLS_H__
   35 #define __MIPS_TLS_H__
   36 
   37 #include <sys/_tls_variant_i.h>
   38 #include <machine/sysarch.h>
   39 
   40 /*
   41  * TLS parameters
   42  */
   43 
   44 #define TLS_DTV_OFFSET  0x8000
   45 #define TLS_TCB_ALIGN   8
   46 #define TLS_TP_OFFSET   0x7000
   47 
   48 #ifdef COMPAT_FREEBSD32
   49 #define TLS_TCB_SIZE32  8
   50 #endif
   51 
   52 #ifndef _KERNEL
   53 
   54 static __inline void
   55 _tcb_set(struct tcb *tcb)
   56 {
   57         sysarch(MIPS_SET_TLS, tcb);
   58 }
   59 
   60 static __inline struct tcb *
   61 _tcb_get(void)
   62 {
   63         struct tcb *tcb;
   64 
   65 #ifdef TLS_USE_SYSARCH
   66         sysarch(MIPS_GET_TLS, &tcb);
   67 #else
   68         __asm__ __volatile__ (
   69             ".set\tpush\n\t"
   70 #ifdef __mips_n64
   71             ".set\tmips64r2\n\t"
   72 #else
   73             ".set\tmips32r2\n\t"
   74 #endif
   75             "rdhwr\t%0, $29\n\t"
   76             ".set\tpop"
   77             : "=r" (tcb));
   78         tcb = (struct tcb *)((uintptr_t)tcb - TLS_TP_OFFSET - TLS_TCB_SIZE);
   79 #endif
   80         return (tcb);
   81 }
   82 
   83 #endif
   84 
   85 #endif  /* __MIPS_TLS_H__ */

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FreeBSD/Linux Kernel Cross Reference sys/mips/include/tls.h

FreeBSD/Linux Kernel Cross Reference
sys/mips/include/tls.h