Initial revision

1 files changed, 47 insertions, 0 deletions

diff --git a/lib_ppc/cache.c b/lib_ppc/cache.c
new file mode 100644
index 00000000000..bec092e4ceb
--- /dev/null
+++ b/lib_ppc/cache.c
@@ -0,0 +1,47 @@
+/*
+ * (C) Copyright 2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+
+void flush_cache (ulong start_addr, ulong size)
+{
+	ulong addr, end_addr = start_addr + size;
+
+	if (CFG_CACHELINE_SIZE) {
+		addr = start_addr & (CFG_CACHELINE_SIZE - 1);
+		for (addr = start_addr;
+		     addr < end_addr;
+		     addr += CFG_CACHELINE_SIZE) {
+			asm ("dcbst 0,%0": :"r" (addr));
+		}
+		asm ("sync");	/* Wait for all dcbst to complete on bus */
+
+		for (addr = start_addr;
+		     addr < end_addr;
+		     addr += CFG_CACHELINE_SIZE) {
+			asm ("icbi 0,%0": :"r" (addr));
+		}
+	}
+	asm ("sync");		/* Always flush prefetch queue in any case */
+	asm ("isync");
+}