1 files changed, 48 insertions, 0 deletions

diff --git a/arch/m68k/platform/coldfire/cache.c b/arch/m68k/platform/coldfire/cache.c
new file mode 100644
index 00000000000..235d3c4f4f0
--- /dev/null
+++ b/arch/m68k/platform/coldfire/cache.c
@@ -0,0 +1,48 @@
+/***************************************************************************/
+
+/*
+ *      cache.c -- general ColdFire Cache maintainence code
+ *
+ *      Copyright (C) 2010, Greg Ungerer (gerg@snapgear.com)
+ */
+
+/***************************************************************************/
+
+#include <linux/kernel.h>
+#include <asm/coldfire.h>
+#include <asm/mcfsim.h>
+
+/***************************************************************************/
+#ifdef CACHE_PUSH
+/***************************************************************************/
+
+/*
+ *      Use cpushl to push all dirty cache lines back to memory.
+ *      Older versions of GAS don't seem to know how to generate the
+ *      ColdFire cpushl instruction... Oh well, bit stuff it for now.
+ */
+
+void mcf_cache_push(void)
+{
+        __asm__ __volatile__ (
+                "clrl   %%d0\n\t"
+                "1:\n\t"
+                "movel  %%d0,%%a0\n\t"
+                "2:\n\t"
+                ".word  0xf468\n\t"
+                "addl   %0,%%a0\n\t"
+                "cmpl   %1,%%a0\n\t"
+                "blt    2b\n\t"
+                "addql  #1,%%d0\n\t"
+                "cmpil  %2,%%d0\n\t"
+                "bne    1b\n\t"
+                : /* No output */
+                : "i" (CACHE_LINE_SIZE),
+                  "i" (DCACHE_SIZE / CACHE_WAYS),
+                  "i" (CACHE_WAYS)
+                : "d0", "a0" );
+}
+
+/***************************************************************************/
+#endif /* CACHE_PUSH */
+/***************************************************************************/