1 files changed, 31 insertions, 0 deletions

diff --git a/arch/m68k/include/asm/m54xxacr.h b/arch/m68k/include/asm/m54xxacr.h
index 424d4a677e43..da713d22dd0f 100644
--- a/arch/m68k/include/asm/m54xxacr.h
+++ b/arch/m68k/include/asm/m54xxacr.h
@@ -40,4 +40,35 @@
 #define ACR_CM          0x00000060      /* Cache mode mask */
 #define ACR_WPROTECT    0x00000004      /* Write protect */
 
+#ifndef __ASSEMBLY__
+
+static inline void __m54xx_flush_cache_all(void)
+{
+        /*
+         *      Use cpushl to push and invalidate all cache lines.
+         *      Gas doesn't seem to know how to generate the ColdFire
+         *      cpushl instruction... Oh well, bit stuff it for now.
+         */
+        __asm__ __volatile__ (
+                "nop\n\t"
+                "clrl   %%d0\n\t"
+                "1:\n\t"
+                "movel  %%d0,%%a0\n\t"
+                "2:\n\t"
+                ".word  0xf468\n\t"
+                "addl   #0x10,%%a0\n\t"
+                "cmpl   #0x00000800,%%a0\n\t"
+                "blt    2b\n\t"
+                "addql  #1,%%d0\n\t"
+                "cmpil  #4,%%d0\n\t"
+                "bne    1b\n\t"
+                "movel  #0xb6088500,%%d0\n\t"
+                "movec  %%d0,%%CACR\n\t"
+                : : : "d0", "a0" );
+}
+
+#define __flush_cache_all() __m54xx_flush_cache_all()
+
+#endif /* __ASSEMBLY__ */
+
 #endif  /* m54xxacr_h */