[thirdparty/glibc.git] / sysdeps / microblaze / nptl / tls.h

/* Copyright (C) 2005-2015 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>

/* Type for the dtv.  */
typedef union dtv
{
  size_t counter;
  struct
  {
    void *val;
    bool is_static;
  } pointer;
} dtv_t;

#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;

static inline void *__microblaze_get_thread_area (void)
{
  register void * volatile __microblaze_thread_area asm ("r21");
  return (void *) __microblaze_thread_area;
}

# define READ_THREAD_POINTER() \
  ({ __microblaze_get_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)); 0; })

# 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_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.  */
Commit	Line	Data
b168057a	1	/* Copyright (C) 2005-2015 Free Software Foundation, Inc.
7756ba9d DH	2
	3	This file is part of the GNU C Library.
	4
	5	The GNU C Library is free software; you can redistribute it and/or
	6	modify it under the terms of the GNU Lesser General Public License as
	7	published by the Free Software Foundation; either version 2.1 of the
	8	License, or (at your option) any later version.
	9
	10	The GNU C Library is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	Lesser General Public License for more details.
	14
	15	You should have received a copy of the GNU Lesser General Public
	16	License along with the GNU C Library; if not, see
	17	<http://www.gnu.org/licenses/>. */
	18
	19	#ifndef _TLS_H
	20	# define _TLS_H 1
	21
	22	# include <dl-sysdep.h>
	23
	24	#ifndef __ASSEMBLER__
	25	# include <stdbool.h>
	26	# include <stddef.h>
	27	# include <stdint.h>
	28
	29	/* Type for the dtv. */
	30	typedef union dtv
	31	{
	32	size_t counter;
	33	struct
	34	{
	35	void *val;
	36	bool is_static;
	37	} pointer;
	38	} dtv_t;
	39
	40	#else /* __ASSEMBLER__ */
	41	# include <tcb-offsets.h>
	42	#endif /* __ASSEMBLER__ */
	43
	44	#ifndef __ASSEMBLER__
	45
	46	/* Get system call information. */
	47	# include <sysdep.h>
	48
	49	/* The TP points to the start of the thread blocks. */
	50	# define TLS_DTV_AT_TP 1
498a2233	51	# define TLS_TCB_AT_TP 0
7756ba9d DH	52
	53	/* Get the thread descriptor definition. */
	54	# include <nptl/descr.h>
	55
	56	typedef struct
	57	{
	58	dtv_t *dtv;
	59	void *private;
	60	} tcbhead_t;
	61
	62	static inline void *__microblaze_get_thread_area (void)
	63	{
	64	register void * volatile __microblaze_thread_area asm ("r21");
	65	return (void *) __microblaze_thread_area;
	66	}
	67
	68	# define READ_THREAD_POINTER() \
	69	({ __microblaze_get_thread_area(); })
	70
	71	/* This is the size of the initial TCB. */
	72	# define TLS_INIT_TCB_SIZE sizeof (tcbhead_t)
	73
	74	/* Alignment requirements for the initial TCB. */
	75	# define TLS_INIT_TCB_ALIGN __alignof__ (tcbhead_t)
	76
	77	/* This is the size of the TCB. */
	78	# define TLS_TCB_SIZE sizeof (tcbhead_t)
	79
	80	/* This is the size we need before TCB. */
	81	# define TLS_PRE_TCB_SIZE sizeof (struct pthread)
	82
	83	/* Alignment requirements for the TCB. */
	84	# define TLS_TCB_ALIGN __alignof__ (struct pthread)
	85
	86	/* Install the dtv pointer. The pointer passed is to the element with
	87	index -1 which contain the length. */
	88	# define INSTALL_DTV(tcbp, dtvp) \
	89	(((tcbhead_t *) (tcbp))->dtv = (dtvp) + 1)
	90
	91	/* Install new dtv for current thread. */
	92	# define INSTALL_NEW_DTV(dtv) \
	93	(THREAD_DTV() = (dtv))
	94
	95	/* Return dtv of given thread descriptor. */
	96	# define GET_DTV(tcbp) \
	97	(((tcbhead_t *) (tcbp))->dtv)
	98
	99	/* Code to initially initialize the thread pointer.
	100	r21 is reserved for thread pointer. */
774f9285	101	# define TLS_INIT_TP(tcbp) \
7756ba9d DH	102	({ __asm __volatile ("or r21,r0,%0" : : "r" ((void *)tcbp)); 0; })
7756ba9d DH	103
9bca952a RM	104	# define TLS_DEFINE_INIT_TP(tp, pd) void *tp = (pd) + 1
9bca952a RM	105
7756ba9d DH	106	/* Return the address of the dtv for the current thread. */
	107	# define THREAD_DTV() \
	108	(((tcbhead_t *) READ_THREAD_POINTER())->dtv)
	109
	110	/* Return the thread descriptor for the current thread. */
	111	# define THREAD_SELF \
	112	(((struct pthread *) READ_THREAD_POINTER()) - 1)
	113
	114	/* Magic for libthread_db to know how to do THREAD_SELF. */
	115	# define DB_THREAD_SELF \
	116	CONST_THREAD_AREA (32, sizeof (struct pthread))
	117
	118	/* Read member of the thread descriptor directly. */
	119	# define THREAD_GETMEM(descr, member) (descr->member)
	120
	121	/* Same as THREAD_GETMEM, but the member offset can be non-constant. */
	122	# define THREAD_GETMEM_NC(descr, member, idx) \
	123	(descr->member[idx])
	124
	125	/* Set member of the thread descriptor directly. */
	126	# define THREAD_SETMEM(descr, member, value) \
	127	(descr->member = (value))
	128
	129	/* Same as THREAD_SETMEM, but the member offset can be non-constant. */
	130	# define THREAD_SETMEM_NC(descr, member, idx, value) \
	131	(descr->member[idx] = (value))
	132
	133	/* Get and set the global scope generation counter in struct pthread. */
	134	# define THREAD_GSCOPE_FLAG_UNUSED 0
	135	# define THREAD_GSCOPE_FLAG_USED 1
	136	# define THREAD_GSCOPE_FLAG_WAIT 2
	137	# define THREAD_GSCOPE_RESET_FLAG() \
	138	do \
	139	{ int __res \
	140	= atomic_exchange_rel (&THREAD_SELF->header.gscope_flag, \
	141	THREAD_GSCOPE_FLAG_UNUSED); \
	142	if (__res == THREAD_GSCOPE_FLAG_WAIT) \
	143	lll_futex_wake (&THREAD_SELF->header.gscope_flag, 1, LLL_PRIVATE); \
	144	} \
	145	while (0)
	146	# define THREAD_GSCOPE_SET_FLAG() \
	147	do \
	148	{ \
	149	THREAD_SELF->header.gscope_flag = THREAD_GSCOPE_FLAG_USED; \
	150	atomic_write_barrier (); \
	151	} \
	152	while (0)
	153	# define THREAD_GSCOPE_WAIT() \
	154	GL (dl_wait_lookup_done) ()
	155
	156	#endif /* __ASSEMBLER__ */
	157
	158	#endif /* tls.h. */