diff options
author | David Holsgrove <david.holsgrove@xilinx.com> | 2012-01-10 15:38:42 +1000 |
---|---|---|
committer | David Holsgrove <david.holsgrove@xilinx.com> | 2013-04-18 11:00:13 +1000 |
commit | 7756ba9d6d268b893fd17e56119cea6636be903f (patch) | |
tree | ce6db2419299a4f5394f5fad6bb3bdaab67d2bf6 /ports/sysdeps/microblaze/nptl/tls.h | |
parent | 5c5b07da032b966260489f0d51de4bac2444fdaf (diff) | |
download | glibc-7756ba9d6d268b893fd17e56119cea6636be903f.tar.gz glibc-7756ba9d6d268b893fd17e56119cea6636be903f.tar.xz glibc-7756ba9d6d268b893fd17e56119cea6636be903f.zip |
MicroBlaze Port
Signed-off-by: David Holsgrove <david.holsgrove@xilinx.com> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Diffstat (limited to 'ports/sysdeps/microblaze/nptl/tls.h')
-rw-r--r-- | ports/sysdeps/microblaze/nptl/tls.h | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/ports/sysdeps/microblaze/nptl/tls.h b/ports/sysdeps/microblaze/nptl/tls.h new file mode 100644 index 0000000000..9598982cc2 --- /dev/null +++ b/ports/sysdeps/microblaze/nptl/tls.h @@ -0,0 +1,155 @@ +/* Copyright (C) 2005-2013 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 + +/* 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, secondcall) \ + ({ __asm __volatile ("or r21,r0,%0" : : "r" ((void *)tcbp)); 0; }) + +/* 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. */ |