urcu/arch/arm.h

   1 #ifndef _URCU_ARCH_ARM_H
   2 #define _URCU_ARCH_ARM_H
   3
   4 /*
   5  * arch_arm.h: trivial definitions for the ARM architecture.
   6  *
   7  * Copyright (c) 2010 Paul E. McKenney, IBM Corporation.
   8  * Copyright (c) 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   9  *
  10  * This library is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU Lesser General Public
  12  * License as published by the Free Software Foundation; either
  13  * version 2.1 of the License, or (at your option) any later version.
  14  *
  15  * This library is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public
  21  * License along with this library; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  23  */
  24
  25 #include <urcu/compiler.h>
  26 #include <urcu/config.h>
  27
  28 #ifdef __cplusplus
  29 extern "C" {
  30 #endif
  31
  32 #ifdef CONFIG_RCU_ARM_HAVE_DMB
  33 #define cmm_mb()        asm volatile("dmb":::"memory")
  34 #define cmm_rmb()       asm volatile("dmb":::"memory")
  35 #define cmm_wmb()       asm volatile("dmb":::"memory")
  36 #endif /* CONFIG_RCU_ARM_HAVE_DMB */
  37
  38 #include <stdlib.h>
  39 #include <sys/time.h>
  40
  41 typedef unsigned long long cycles_t;
  42
  43 static inline cycles_t caa_get_cycles (void)
  44 {
  45         cycles_t thetime;
  46         struct timeval tv;
  47
  48         if (gettimeofday(&tv, NULL) != 0)
  49                 return 0;
  50         thetime = ((cycles_t)tv.tv_sec) * 1000000ULL + ((cycles_t)tv.tv_usec);
  51         return (cycles_t)thetime;
  52 }
  53
  54 #ifdef __cplusplus
  55 }
  56 #endif
  57
  58 #include <urcu/arch/generic.h>
  59
  60 #endif /* _URCU_ARCH_ARM_H */