Minimal libc for PowerPC.

Reviewed by: benno

Approved by: re (blanket)

1 files changed, 98 insertions, 0 deletions

diff --git a/lib/libc/powerpc/gen/syncicache.c b/lib/libc/powerpc/gen/syncicache.c
new file mode 100644
index 000000000000..12dd55cb9c82
--- /dev/null
+++ b/lib/libc/powerpc/gen/syncicache.c
@@ -0,0 +1,98 @@
+/*
+ * 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
+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");
+}