/* Copyright (C) 2005-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public License as

   published by the Free Software Foundation; either version 2.1 of the

   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#ifndef _TLS_H

# define _TLS_H 1

# include <dl-sysdep.h>

#ifndef __ASSEMBLER__

# include <stdbool.h>

# include <stddef.h>

# include <stdint.h>

# include <dl-dtv.h>

#else /* __ASSEMBLER__ */

# include <tcb-offsets.h>

#endif /* __ASSEMBLER__ */

#ifndef __ASSEMBLER__

/* Get system call information.  */

# include <sysdep.h>

/* The TP points to the start of the thread blocks.  */

# define TLS_DTV_AT_TP  1

# define TLS_TCB_AT_TP  0

/* Get the thread descriptor definition.  */

# include <nptl/descr.h>

typedef struct

{

  dtv_t *dtv;

  void *private;

} tcbhead_t;

#define READ_THREAD_POINTER() \

  ({ register void *__microblaze_thread_area asm ("r21"); \

     __microblaze_thread_area; })

/* This is the size of the initial TCB.  */

# define TLS_INIT_TCB_SIZE  sizeof (tcbhead_t)

/* Alignment requirements for the initial TCB.  */

# define TLS_INIT_TCB_ALIGN __alignof__ (tcbhead_t)

/* This is the size of the TCB.  */

# define TLS_TCB_SIZE       sizeof (tcbhead_t)

/* This is the size we need before TCB.  */

# define TLS_PRE_TCB_SIZE   sizeof (struct pthread)

/* Alignment requirements for the TCB.  */

# define TLS_TCB_ALIGN      __alignof__ (struct pthread)

/* Install the dtv pointer.  The pointer passed is to the element with

   index -1 which contain the length.  */

# define INSTALL_DTV(tcbp, dtvp) \

  (((tcbhead_t *) (tcbp))->dtv = (dtvp) + 1)

/* Install new dtv for current thread.  */

# define INSTALL_NEW_DTV(dtv) \

  (THREAD_DTV() = (dtv))

/* Return dtv of given thread descriptor.  */

# define GET_DTV(tcbp) \

  (((tcbhead_t *) (tcbp))->dtv)

/* Code to initially initialize the thread pointer.

   r21 is reserved for thread pointer.  */

# define TLS_INIT_TP(tcbp) \

  ({ __asm __volatile ("or r21,r0,%0" : : "r" ((void *)tcbp)); NULL; })

# define TLS_DEFINE_INIT_TP(tp, pd) void *tp = (pd) + 1

/* Return the address of the dtv for the current thread.  */

# define THREAD_DTV() \

  (((tcbhead_t *) READ_THREAD_POINTER())->dtv)

/* Return the thread descriptor for the current thread.  */

# define THREAD_SELF \

  (((struct pthread *) READ_THREAD_POINTER()) - 1)

/* Magic for libthread_db to know how to do THREAD_SELF.  */

# define DB_THREAD_SELF \

  CONST_THREAD_AREA (32, sizeof (struct pthread))

/* Read member of the thread descriptor directly.  */

# define THREAD_GETMEM(descr, member) (descr->member)

/* Same as THREAD_GETMEM, but the member offset can be non-constant.  */

# define THREAD_GETMEM_NC(descr, member, idx) \

  (descr->member[idx])

/* Set member of the thread descriptor directly.  */

# define THREAD_SETMEM(descr, member, value) \

  (descr->member = (value))

/* Same as THREAD_SETMEM, but the member offset can be non-constant.  */

# define THREAD_SETMEM_NC(descr, member, idx, value) \

  (descr->member[idx] = (value))

/* Get and set the global scope generation counter in struct pthread.  */

# define THREAD_GSCOPE_IN_TCB      1

# define THREAD_GSCOPE_FLAG_UNUSED 0

# define THREAD_GSCOPE_FLAG_USED   1

# define THREAD_GSCOPE_FLAG_WAIT   2

# define THREAD_GSCOPE_RESET_FLAG()                                         \

  do                                                                        \

    { int __res                                                             \

      = atomic_exchange_rel (&THREAD_SELF->header.gscope_flag,              \

                             THREAD_GSCOPE_FLAG_UNUSED);                    \

      if (__res == THREAD_GSCOPE_FLAG_WAIT)                                 \

        lll_futex_wake (&THREAD_SELF->header.gscope_flag, 1, LLL_PRIVATE);  \

    }                                                                       \

  while (0)

# define THREAD_GSCOPE_SET_FLAG()                                           \

  do                                                                        \

    {                                                                       \

      THREAD_SELF->header.gscope_flag = THREAD_GSCOPE_FLAG_USED;            \

      atomic_write_barrier ();                                              \

    }                                                                       \

  while (0)

# define THREAD_GSCOPE_WAIT() \

  GL (dl_wait_lookup_done) ()

#endif /* __ASSEMBLER__ */

#endif /* tls.h.  */