The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/powerpc/powerpc/syncicache.c

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    1 /*-
    2  * Copyright (C) 1995-1997, 1999 Wolfgang Solfrank.
    3  * Copyright (C) 1995-1997, 1999 TooLs GmbH.
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  * 3. All advertising materials mentioning features or use of this software
   15  *    must display the following acknowledgement:
   16  *      This product includes software developed by TooLs GmbH.
   17  * 4. The name of TooLs GmbH may not be used to endorse or promote products
   18  *    derived from this software without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
   21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   23  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   25  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
   26  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   27  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
   28  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
   29  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   30  *
   31  * $NetBSD: syncicache.c,v 1.2 1999/05/05 12:36:40 tsubai Exp $
   32  */
   33 
   34 #ifndef lint
   35 static const char rcsid[] =
   36   "$FreeBSD: releng/8.2/sys/powerpc/powerpc/syncicache.c 183319 2008-09-24 00:28:46Z nwhitehorn $";
   37 #endif /* not lint */
   38 
   39 #include <sys/param.h>
   40 #if     defined(_KERNEL) || defined(_STANDALONE)
   41 #include <sys/time.h>
   42 #include <sys/proc.h>
   43 #include <vm/vm.h>
   44 #endif
   45 #include <sys/sysctl.h>
   46 
   47 #include <machine/cpu.h>
   48 #include <machine/md_var.h>
   49 
   50 void
   51 __syncicache(void *from, int len)
   52 {
   53         int     l, off;
   54         char    *p;
   55 
   56         off = (u_int)from & (cacheline_size - 1);
   57         l = len += off;
   58         p = (char *)from - off;
   59 
   60         do {
   61                 __asm __volatile ("dcbst 0,%0" :: "r"(p));
   62                 p += cacheline_size;
   63         } while ((l -= cacheline_size) > 0);
   64         __asm __volatile ("sync");
   65         p = (char *)from - off;
   66         do {
   67                 __asm __volatile ("icbi 0,%0" :: "r"(p));
   68                 p += cacheline_size;
   69         } while ((len -= cacheline_size) > 0);
   70         __asm __volatile ("sync; isync");
   71 }
   72 

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