include/urcu/arch/s390.h

   1 // SPDX-FileCopyrightText: 2009 Novell, Inc.
   2 //
   3 // SPDX-License-Identifier: MIT
   4
   5 #ifndef _URCU_ARCH_S390_H
   6 #define _URCU_ARCH_S390_H
   7
   8 /*
   9  * Trivial definitions for the S390 architecture based on information from the
  10  * Principles of Operation "CPU Serialization" (5-91), "BRANCH ON CONDITION"
  11  * (7-25) and "STORE CLOCK" (7-169).
  12  *
  13  * Author: Jan Blunck <jblunck@suse.de>
  14  */
  15
  16 #include <urcu/compiler.h>
  17 #include <urcu/config.h>
  18 #include <urcu/syscall-compat.h>
  19 #include <stdint.h>
  20
  21 #ifdef __cplusplus
  22 extern "C" {
  23 #endif
  24
  25 #define CAA_CACHE_LINE_SIZE     128
  26
  27 #define cmm_mb()    __asm__ __volatile__("bcr 15,0" : : : "memory")
  28
  29 #define HAS_CAA_GET_CYCLES
  30
  31 typedef uint64_t caa_cycles_t;
  32
  33 static inline caa_cycles_t caa_get_cycles (void)
  34 {
  35         caa_cycles_t cycles;
  36
  37         __asm__ __volatile__("stck %0" : "=m" (cycles) : : "cc", "memory" );
  38
  39         return cycles;
  40 }
  41
  42 /*
  43  * On Linux, define the membarrier system call number if not yet available in
  44  * the system headers.
  45  */
  46 #if (defined(__linux__) && !defined(__NR_membarrier))
  47 #define __NR_membarrier         356
  48 #endif
  49
  50 #ifdef __cplusplus
  51 }
  52 #endif
  53
  54 #include <urcu/arch/generic.h>
  55
  56 #endif /* _URCU_ARCH_S390_H */