lib/librte_eal/common/include/arch/ppc_64/rte_spinlock.h

   1 /*
   2  *   BSD LICENSE
   3  *
   4  *   Copyright (C) IBM Corporation 2014.
   5  *
   6  *   Redistribution and use in source and binary forms, with or without
   7  *   modification, are permitted provided that the following conditions
   8  *   are met:
   9  *
  10  *     * Redistributions of source code must retain the above copyright
  11  *       notice, this list of conditions and the following disclaimer.
  12  *     * Redistributions in binary form must reproduce the above copyright
  13  *       notice, this list of conditions and the following disclaimer in
  14  *       the documentation and/or other materials provided with the
  15  *       distribution.
  16  *     * Neither the name of IBM Corporation nor the names of its
  17  *       contributors may be used to endorse or promote products derived
  18  *       from this software without specific prior written permission.
  19  *
  20  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  23  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  24  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  30  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31 */
  32
  33 #ifndef _RTE_SPINLOCK_PPC_64_H_
  34 #define _RTE_SPINLOCK_PPC_64_H_
  35
  36 #ifdef __cplusplus
  37 extern "C" {
  38 #endif
  39
  40 #include <rte_common.h>
  41 #include <rte_pause.h>
  42 #include "generic/rte_spinlock.h"
  43
  44 /* Fixme: Use intrinsics to implement the spinlock on Power architecture */
  45
  46 #ifndef RTE_FORCE_INTRINSICS
  47
  48 static inline void
  49 rte_spinlock_lock(rte_spinlock_t *sl)
  50 {
  51         while (__sync_lock_test_and_set(&sl->locked, 1))
  52                 while (sl->locked)
  53                         rte_pause();
  54 }
  55
  56 static inline void
  57 rte_spinlock_unlock(rte_spinlock_t *sl)
  58 {
  59         __sync_lock_release(&sl->locked);
  60 }
  61
  62 static inline int
  63 rte_spinlock_trylock(rte_spinlock_t *sl)
  64 {
  65         return __sync_lock_test_and_set(&sl->locked, 1) == 0;
  66 }
  67
  68 #endif
  69
  70 static inline int rte_tm_supported(void)
  71 {
  72         return 0;
  73 }
  74
  75 static inline void
  76 rte_spinlock_lock_tm(rte_spinlock_t *sl)
  77 {
  78         rte_spinlock_lock(sl); /* fall-back */
  79 }
  80
  81 static inline int
  82 rte_spinlock_trylock_tm(rte_spinlock_t *sl)
  83 {
  84         return rte_spinlock_trylock(sl);
  85 }
  86
  87 static inline void
  88 rte_spinlock_unlock_tm(rte_spinlock_t *sl)
  89 {
  90         rte_spinlock_unlock(sl);
  91 }
  92
  93 static inline void
  94 rte_spinlock_recursive_lock_tm(rte_spinlock_recursive_t *slr)
  95 {
  96         rte_spinlock_recursive_lock(slr); /* fall-back */
  97 }
  98
  99 static inline void
 100 rte_spinlock_recursive_unlock_tm(rte_spinlock_recursive_t *slr)
 101 {
 102         rte_spinlock_recursive_unlock(slr);
 103 }
 104
 105 static inline int
 106 rte_spinlock_recursive_trylock_tm(rte_spinlock_recursive_t *slr)
 107 {
 108         return rte_spinlock_recursive_trylock(slr);
 109 }
 110
 111 #ifdef __cplusplus
 112 }
 113 #endif
 114
 115 #endif /* _RTE_SPINLOCK_PPC_64_H_ */