cpukit/score/cpu/m68k/__m68k_read_tp.c


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/*
 * Copyright (c) 2014-2015 embedded brains GmbH.  All rights reserved.
 *
 *  embedded brains GmbH
 *  Dornierstr. 4
 *  82178 Puchheim
 *  Germany
 *  <rtems@embedded-brains.de>
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://www.rtems.org/license/LICENSE.
 */

#ifdef HAVE_CONFIG_H
  #include "config.h"
#endif

#include <rtems/score/threadimpl.h>
#include <rtems/score/tls.h>

void __m68k_read_tp(void);

void __m68k_read_tp(void)
{
  const Thread_Control *executing = _Thread_Get_executing();
  void *tp = (char *) executing->Start.tls_area +
    _TLS_Get_thread_control_block_area_size((uintptr_t) _TLS_Alignment)
    + 0x7000;

  __asm__ volatile (
    "move.l %0, %%a0"
    :
    : "d" (tp)
  );
}