FreeBSD/Linux Kernel Cross Reference
sys/contrib/ck/include/ck_md.h

     /*
      * Copyright 2018 Samy Al Bahra.
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * $FreeBSD: head/sys/contrib/ck/include/ck_md.h 329388 2018-02-16 17:50:06Z cog
    net $
     */
    
    /*
     * This header file is meant for use of Concurrency Kit in the FreeBSD kernel.
     */
    
    #ifndef CK_MD_H
    #define CK_MD_H
    
    #include <sys/param.h>
    
    #ifndef _KERNEL
    #error This header file is meant for the FreeBSD kernel.
    #endif /* _KERNEL */
    
    #ifndef CK_MD_CACHELINE
    /*
     * FreeBSD's CACHE_LINE macro is a compile-time maximum cache-line size for an
     * architecture, defined to be 128 bytes by default on x86*. Even in presence
     * of adjacent sector prefetch, this doesn't make sense from a modeling
     * perspective.
     */
    #if defined(__amd64__) || defined(__i386__)
    #define CK_MD_CACHELINE (64)
    #else
    #define CK_MD_CACHELINE (CACHE_LINE_SIZE)
    #endif /* !__amd64__ && !__i386__ */
    #endif /* CK_MD_CACHELINE */
    
    #ifndef CK_MD_PAGESIZE
    #define CK_MD_PAGESIZE (PAGE_SIZE)
    #endif
    
    /*
     * Once FreeBSD has a mechanism to detect RTM, this can be enabled and RTM
     * facilities can be called. These facilities refer to TSX.
     */
    #ifndef CK_MD_RTM_DISABLE
    #define CK_MD_RTM_DISABLE
    #endif /* CK_MD_RTM_DISABLE */
    
    /*
     * Do not enable pointer-packing-related (VMA) optimizations in kernel-space.
     */
    #ifndef CK_MD_POINTER_PACK_DISABLE
    #define CK_MD_POINTER_PACK_DISABLE
    #endif /* CK_MD_POINTER_PACK_DISABLE */
    
    /*
     * The following would be used for pointer-packing tricks, disabled for the
     * kernel.
     */
    #ifndef CK_MD_VMA_BITS_UNKNOWN
    #define CK_MD_VMA_BITS_UNKNOWN
    #endif /* CK_MD_VMA_BITS_UNKNOWN */
    
    /*
     * Do not enable double operations in kernel-space.
     */
    #ifndef CK_PR_DISABLE_DOUBLE
    #define CK_PR_DISABLE_DOUBLE
    #endif /* CK_PR_DISABLE_DOUBLE */
    
    /*
     * If building for a uni-processor target, then enable the uniprocessor
     * feature flag. This, among other things, will remove the lock prefix.
     */
    #ifndef SMP
    #define CK_MD_UMP
    #endif /* SMP */
    
    /*
    * Disable the use of compiler builtin functions.
    */
   #define CK_MD_CC_BUILTIN_DISABLE 1
   
   /*
    * CK expects those, which are normally defined by the build system.
    */
   #if defined(__i386__) && !defined(__x86__)
   #define __x86__
   /*
    * If x86 becomes more relevant, we may want to consider importing in
    * __mbk() to avoid potential issues around false sharing.
    */
   #define CK_MD_TSO
   #define CK_MD_SSE_DISABLE 1
   #elif defined(__amd64__)
   #define CK_MD_TSO
   #elif defined(__powerpc64__) && !defined(__ppc64__)
   #define __ppc64__
   #elif defined(__powerpc__) && !defined(__ppc__)
   #define __ppc__
   #endif
   
   /* If no memory model has been defined, assume RMO. */
   #if !defined(CK_MD_RMO) && !defined(CK_MD_TSO) && !defined(CK_MD_PSO)
   #define CK_MD_RMO
   #endif
   
   #define CK_VERSION "0.7.0"
   #define CK_GIT_SHA "db5db44"
   
   #endif /* CK_MD_H */

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