Merge tag 'v2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[mv-sheeva.git] / arch / m68knommu / platform / coldfire / cache.c

diff --git a/arch/m68knommu/platform/coldfire/cache.c b/arch/m68knommu/platform/coldfire/cache.c
new file mode 100644 (file)
index 0000000..235d3c4
--- /dev/null
+++ b/arch/m68knommu/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 */
+/***************************************************************************/