File-copy from v4.4.100

This is the result of 'cp' from a linux-stable tree with the 'v4.4.100'
tag checked out (commit 26d6298789e695c9f627ce49a7bbd2286405798a) on
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Please refer to that tree for all history prior to this point.

Change-Id: I8a9ee2aea93cd29c52c847d0ce33091a73ae6afe
diff --git a/arch/m32r/mm/cache.c b/arch/m32r/mm/cache.c
new file mode 100644
index 0000000..fac7595
--- /dev/null
+++ b/arch/m32r/mm/cache.c
@@ -0,0 +1,88 @@
+/*
+ *  linux/arch/m32r/mm/cache.c
+ *
+ *  Copyright (C) 2002-2005  Hirokazu Takata, Hayato Fujiwara
+ */
+
+#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
+#elif defined(CONFIG_CHIP_M32104)
+#define MCCR		((volatile unsigned short*)0xfffffffe)
+#define MCCR_IIV	(1UL << 8)	/* I-cache invalidate */
+#define MCCR_DIV	(1UL << 9)	/* D-cache invalidate */
+#define MCCR_DCB	(1UL << 10)	/* D-cache copy back */
+#define MCCR_ICM	(1UL << 0)	/* I-cache mode [0:off,1:on] */
+#define MCCR_DCM	(1UL << 1)	/* D-cache mode [0:off,1:on] */
+#define MCCR_ICACHE_INV		MCCR_IIV
+#define MCCR_DCACHE_CB		MCCR_DCB
+#define MCCR_DCACHE_CBINV	(MCCR_DIV|MCCR_DCB)
+#endif
+
+#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)
+	unsigned char mccr;
+	*MCCR = MCCR_ICACHE_INV;
+#elif defined(CONFIG_CHIP_M32104)
+	unsigned short mccr;
+
+	/* Copyback and invalidate D-cache */
+	/* Invalidate I-cache */
+	*MCCR |= (MCCR_ICACHE_INV | MCCR_DCACHE_CBINV);
+#else
+	unsigned long mccr;
+
+	/* Copyback and invalidate D-cache */
+	/* Invalidate I-cache */
+	*MCCR = MCCR_ICACHE_INV | MCCR_DCACHE_CBINV;
+#endif
+	while ((mccr = *MCCR) & MCCR_IIV); /* loop while invalidating... */
+}
+
+/* Copy back D-cache and invalidate I-cache all */
+void _flush_cache_copyback_all(void)
+{
+#if defined(CONFIG_CHIP_M32102)
+	unsigned char mccr;
+	*MCCR = MCCR_ICACHE_INV;
+#elif defined(CONFIG_CHIP_M32104)
+	unsigned short mccr;
+
+	/* Copyback and invalidate D-cache */
+	/* Invalidate I-cache */
+	*MCCR |= (MCCR_ICACHE_INV | MCCR_DCACHE_CB);
+#else
+	unsigned long mccr;
+
+	/* Copyback D-cache */
+	/* Invalidate I-cache */
+	*MCCR = MCCR_ICACHE_INV | MCCR_DCACHE_CB;
+#endif
+	while ((mccr = *MCCR) & MCCR_IIV); /* loop while invalidating... */
+}