include/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 #include <stdint.h>
  35
  36 #ifdef __cplusplus
  37 extern "C" {
  38 #endif
  39
  40 #define CAA_CACHE_LINE_SIZE     128
  41
  42 #define cmm_mb()    __asm__ __volatile__("bcr 15,0" : : : "memory")
  43
  44 #define HAS_CAA_GET_CYCLES
  45
  46 typedef uint64_t caa_cycles_t;
  47
  48 static inline caa_cycles_t caa_get_cycles (void)
  49 {
  50         caa_cycles_t cycles;
  51
  52         __asm__ __volatile__("stck %0" : "=m" (cycles) : : "cc", "memory" );
  53
  54         return cycles;
  55 }
  56
  57 /*
  58  * On Linux, define the membarrier system call number if not yet available in
  59  * the system headers.
  60  */
  61 #if (defined(__linux__) && !defined(__NR_membarrier))
  62 #define __NR_membarrier         356
  63 #endif
  64
  65 #ifdef __cplusplus
  66 }
  67 #endif
  68
  69 #include <urcu/arch/generic.h>
  70
  71 #endif /* _URCU_ARCH_S390_H */