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 00000000000..31b0789c199
--- /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
+}