urcu/arch/s390.h

   1 #ifndef _URCU_ARCH_S390_H
   2 #define _URCU_ARCH_S390_H
   3
   4 /*
   5  * Trivial definitions for the S390 architecture based on information from the
   6  * Principles of Operation "CPU Serialization" (5-91), "BRANCH ON CONDITION"
   7  * (7-25) and "STORE CLOCK" (7-169).
   8  *
   9  * Copyright (c) 2009 Novell, Inc.
  10  * Author: Jan Blunck <jblunck@suse.de>
  11  *
  12  * Permission is hereby granted, free of charge, to any person obtaining a copy
  13  * of this software and associated documentation files (the "Software"), to
  14  * deal in the Software without restriction, including without limitation the
  15  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
  16  * sell copies of the Software, and to permit persons to whom the Software is
  17  * furnished to do so, subject to the following conditions:
  18  *
  19  * The above copyright notice and this permission notice shall be included in
  20  * all copies or substantial portions of the Software.
  21  *
  22  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  23  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  25  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  26  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  27  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  28  * IN THE SOFTWARE.
  29  */
  30
  31 #include <urcu/compiler.h>
  32 #include <urcu/config.h>
  33 #include <urcu/syscall-compat.h>
  34
  35 #ifdef __cplusplus
  36 extern "C" {
  37 #endif
  38
  39 #define CAA_CACHE_LINE_SIZE     128
  40
  41 #define cmm_mb()    __asm__ __volatile__("bcr 15,0" : : : "memory")
  42
  43 typedef unsigned long long cycles_t;
  44
  45 static inline cycles_t caa_get_cycles (void)
  46 {
  47         cycles_t cycles;
  48
  49         __asm__ __volatile__("stck %0" : "=m" (cycles) : : "cc", "memory" );
  50
  51         return cycles;
  52 }
  53
  54 /*
  55  * Define the membarrier system call number if not yet available in the
  56  * system headers.
  57  */
  58 #ifndef __NR_membarrier
  59 #define __NR_membarrier         356
  60 #endif
  61
  62 #ifdef __cplusplus
  63 }
  64 #endif
  65
  66 #include <urcu/arch/generic.h>
  67
  68 #endif /* _URCU_ARCH_S390_H */