1 files changed, 65 insertions, 0 deletions

diff --git a/arch/m32r/mm/cache.c b/arch/m32r/mm/cache.c
new file mode 100644
index 000000000000..31b0789c1992
--- /dev/null
+++ b/arch/m32r/mm/cache.c
@@ -0,0 +1,65 @@
+/*
+ *  linux/arch/m32r/mm/cache.c
+ *
+ *  Copyright (C) 2002  Hirokazu Takata
+ */
+
+#include <linux/config.h>
+#include <asm/pgtable.h>
+
+#undef MCCR
+
+#if defined(CONFIG_CHIP_XNUX2) || defined(CONFIG_CHIP_M32700) || defined(CONFIG_CHIP_VDEC2) || defined(CONFIG_CHIP_OPSP)
+/* Cache Control Register */
+#define MCCR            ((volatile unsigned long*)0xfffffffc)
+#define MCCR_CC         (1UL << 7)      /* Cache mode modify bit */
+#define MCCR_IIV        (1UL << 6)      /* I-cache invalidate */
+#define MCCR_DIV        (1UL << 5)      /* D-cache invalidate */
+#define MCCR_DCB        (1UL << 4)      /* D-cache copy back */
+#define MCCR_ICM        (1UL << 1)      /* I-cache mode [0:off,1:on] */
+#define MCCR_DCM        (1UL << 0)      /* D-cache mode [0:off,1:on] */
+#define MCCR_ICACHE_INV         (MCCR_CC|MCCR_IIV)
+#define MCCR_DCACHE_CB          (MCCR_CC|MCCR_DCB)
+#define MCCR_DCACHE_CBINV       (MCCR_CC|MCCR_DIV|MCCR_DCB)
+#define CHECK_MCCR(mccr)        (mccr = *MCCR)
+#elif defined(CONFIG_CHIP_M32102)
+#define MCCR            ((volatile unsigned char*)0xfffffffe)
+#define MCCR_IIV        (1UL << 0)      /* I-cache invalidate */
+#define MCCR_ICACHE_INV         MCCR_IIV
+#endif /* CONFIG_CHIP_XNUX2 || CONFIG_CHIP_M32700 */
+
+#ifndef MCCR
+#error Unknown cache type.
+#endif
+
+
+/* Copy back and invalidate D-cache and invalidate I-cache all */
+void _flush_cache_all(void)
+{
+#if defined(CONFIG_CHIP_M32102)
+        *MCCR = MCCR_ICACHE_INV;
+#else
+        unsigned long mccr;
+
+        /* Copyback and invalidate D-cache */
+        /* Invalidate I-cache */
+        *MCCR = MCCR_ICACHE_INV | MCCR_DCACHE_CBINV;
+        while ((mccr = *MCCR) & MCCR_IIV); /* loop while invalidating... */
+#endif
+}
+
+/* Copy back D-cache and invalidate I-cache all */
+void _flush_cache_copyback_all(void)
+{
+#if defined(CONFIG_CHIP_M32102)
+        *MCCR = MCCR_ICACHE_INV;
+#else
+        unsigned long mccr;
+
+        /* Copyback D-cache */
+        /* Invalidate I-cache */
+        *MCCR = MCCR_ICACHE_INV | MCCR_DCACHE_CB;
+        while ((mccr = *MCCR) & MCCR_IIV); /* loop while invalidating... */
+
+#endif
+}