diff options
Diffstat (limited to 'lib/libc/powerpc/gen/syncicache.c')
| -rw-r--r-- | lib/libc/powerpc/gen/syncicache.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/lib/libc/powerpc/gen/syncicache.c b/lib/libc/powerpc/gen/syncicache.c new file mode 100644 index 0000000..e613f3a --- /dev/null +++ b/lib/libc/powerpc/gen/syncicache.c @@ -0,0 +1,100 @@ +/* + * Copyright (C) 1995-1997, 1999 Wolfgang Solfrank. + * Copyright (C) 1995-1997, 1999 TooLs GmbH. + * 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by TooLs GmbH. + * 4. The name of TooLs GmbH may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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. + * + * $NetBSD: syncicache.c,v 1.2 1999/05/05 12:36:40 tsubai Exp $ + */ + +#ifndef lint +static const char rcsid[] = + "$FreeBSD$"; +#endif /* not lint */ + +#include <sys/param.h> +#if defined(_KERNEL) || defined(_STANDALONE) +#include <sys/time.h> +#include <sys/proc.h> +#include <vm/vm.h> +#endif +#include <sys/sysctl.h> + +#include <machine/cpu.h> + +#if defined(_KERNEL) || defined(_STANDALONE) +#ifndef CACHELINESIZE +#error "Must know the size of a cache line" +#endif +#else +#include <stdlib.h> + +static void getcachelinesize(void); + +static int _cachelinesize; +#define CACHELINESIZE _cachelinesize + +static void +getcachelinesize() +{ + static int cachemib[] = { CTL_MACHDEP, CPU_CACHELINE }; + int clen; + + clen = sizeof(_cachelinesize); + + if (sysctl(cachemib, sizeof(cachemib) / sizeof(cachemib[0]), + &_cachelinesize, &clen, NULL, 0) < 0 || !_cachelinesize) { + abort(); + } +} +#endif + +void +__syncicache(void *from, int len) +{ + int l, off; + char *p; + +#if !defined(_KERNEL) && !defined(_STANDALONE) + if (!_cachelinesize) + getcachelinesize(); +#endif + off = (u_int)from & (CACHELINESIZE - 1); + l = len += off; + p = (char *)from - off; + do { + __asm __volatile ("dcbst 0,%0" :: "r"(p)); + p += CACHELINESIZE; + } while ((l -= CACHELINESIZE) > 0); + __asm __volatile ("sync"); + p = (char *)from - off; + do { + __asm __volatile ("icbi 0,%0" :: "r"(p)); + p += CACHELINESIZE; + } while ((len -= CACHELINESIZE) > 0); + __asm __volatile ("sync; isync"); +} |
