text: /*
   * Copyright (c) 2002-2004, Karlsruhe University
   *
   * 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.
   */
  /*
   * Copyright (c) 2007 Open Kernel Labs, Inc. (Copyright Holder).
   * All rights reserved.
   *
   * 1. Redistribution and use of OKL4 (Software) in source and binary
   * forms, with or without modification, are permitted provided that the
   * following conditions are met:
   *
   *     (a) Redistributions of source code must retain this clause 1
   *         (including paragraphs (a), (b) and (c)), clause 2 and clause 3
   *         (Licence Terms) and the above copyright notice.
   *
   *     (b) Redistributions in binary form must reproduce the above
   *         copyright notice and the Licence Terms in the documentation and/or
   *         other materials provided with the distribution.
   *
   *     (c) Redistributions in any form must be accompanied by information on
   *         how to obtain complete source code for:
   *        (i) the Software; and
   *        (ii) all accompanying software that uses (or is intended to
   *        use) the Software whether directly or indirectly.  Such source
   *        code must:
   *        (iii) either be included in the distribution or be available
   *        for no more than the cost of distribution plus a nominal fee;
   *        and
   *        (iv) be licensed by each relevant holder of copyright under
   *        either the Licence Terms (with an appropriate copyright notice)
   *        or the terms of a licence which is approved by the Open Source
   *        Initative.  For an executable file, "complete source code"
   *        means the source code for all modules it contains and includes
   *        associated build and other files reasonably required to produce
   *        the executable.
   *
   * 2. THIS SOFTWARE IS PROVIDED ``AS IS'' AND, TO THE EXTENT PERMITTED BY
   * LAW, ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
   * THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
   * PURPOSE, OR NON-INFRINGEMENT, ARE DISCLAIMED.  WHERE ANY WARRANTY IS
   * IMPLIED AND IS PREVENTED BY LAW FROM BEING DISCLAIMED THEN TO THE
   * EXTENT PERMISSIBLE BY LAW: (A) THE WARRANTY IS READ DOWN IN FAVOUR OF
   * THE COPYRIGHT HOLDER (AND, IN THE CASE OF A PARTICIPANT, THAT
   * PARTICIPANT) AND (B) ANY LIMITATIONS PERMITTED BY LAW (INCLUDING AS TO
   * THE EXTENT OF THE WARRANTY AND THE REMEDIES AVAILABLE IN THE EVENT OF
   * BREACH) ARE DEEMED PART OF THIS LICENCE IN A FORM MOST FAVOURABLE TO
   * THE COPYRIGHT HOLDER (AND, IN THE CASE OF A PARTICIPANT, THAT
   * PARTICIPANT). IN THE LICENCE TERMS, "PARTICIPANT" INCLUDES EVERY
   * PERSON WHO HAS CONTRIBUTED TO THE SOFTWARE OR WHO HAS BEEN INVOLVED IN
   * THE DISTRIBUTION OR DISSEMINATION OF THE SOFTWARE.
   *
   * 3. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR ANY OTHER PARTICIPANT 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.
   */
  
  #ifndef __IA32__LDT_H__
  #define __IA32__LDT_H__
  
  #include <kernel/l4.h>
  #include <kernel/arch/segdesc.h>
  
  class tcb_t;   // fw decl
  
  
  #define LDT_GS_MASK    ((word_t)1 << (BITS_WORD - 1))
  #define LDT_FS_MASK    ((word_t)1 << (BITS_WORD - 2))
  
  #define LDT_INDEX_MASK (((word_t)1 << 13) - 1)
  
  extern void update_ldt(tcb_t *);
  word_t set_ldt(tcb_t *, word_t, ia32_segdesc_t);
  
  
  #endif	/*__IA32__LDT_H__*/
  