Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 101 insertions, 0 deletions

diff --git a/arch/m68k/include/asm/cacheflush_no.h b/arch/m68k/include/asm/cacheflush_no.h
new file mode 100644
index 000000000..11e9a9dcb
--- /dev/null
+++ b/arch/m68k/include/asm/cacheflush_no.h
@@ -0,0 +1,101 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _M68KNOMMU_CACHEFLUSH_H
+#define _M68KNOMMU_CACHEFLUSH_H
+
+/*
+ * (C) Copyright 2000-2010, Greg Ungerer <gerg@snapgear.com>
+ */
+#include <linux/mm.h>
+#include <asm/mcfsim.h>
+
+#define flush_cache_all()			__flush_cache_all()
+#define flush_cache_mm(mm)			do { } while (0)
+#define flush_cache_dup_mm(mm)			do { } while (0)
+#define flush_cache_range(vma, start, end)	do { } while (0)
+#define flush_cache_page(vma, vmaddr)		do { } while (0)
+#define flush_dcache_range(start, len)		__flush_dcache_all()
+#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
+#define flush_dcache_page(page)			do { } while (0)
+#define flush_dcache_mmap_lock(mapping)		do { } while (0)
+#define flush_dcache_mmap_unlock(mapping)	do { } while (0)
+#define flush_icache_range(start, len)		__flush_icache_all()
+#define flush_icache_page(vma,pg)		do { } while (0)
+#define flush_icache_user_range(vma,pg,adr,len)	do { } while (0)
+#define flush_cache_vmap(start, end)		do { } while (0)
+#define flush_cache_vunmap(start, end)		do { } while (0)
+
+#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
+	memcpy(dst, src, len)
+#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
+	memcpy(dst, src, len)
+
+void mcf_cache_push(void);
+
+static inline void __clear_cache_all(void)
+{
+#ifdef CACHE_INVALIDATE
+	__asm__ __volatile__ (
+		"movec	%0, %%CACR\n\t"
+		"nop\n\t"
+		: : "r" (CACHE_INVALIDATE) );
+#endif
+}
+
+static inline void __flush_cache_all(void)
+{
+#ifdef CACHE_PUSH
+	mcf_cache_push();
+#endif
+	__clear_cache_all();
+}
+
+/*
+ * Some ColdFire parts implement separate instruction and data caches,
+ * on those we should just flush the appropriate cache. If we don't need
+ * to do any specific flushing then this will be optimized away.
+ */
+static inline void __flush_icache_all(void)
+{
+#ifdef CACHE_INVALIDATEI
+	__asm__ __volatile__ (
+		"movec	%0, %%CACR\n\t"
+		"nop\n\t"
+		: : "r" (CACHE_INVALIDATEI) );
+#endif
+}
+
+static inline void __flush_dcache_all(void)
+{
+#ifdef CACHE_PUSH
+	mcf_cache_push();
+#endif
+#ifdef CACHE_INVALIDATED
+	__asm__ __volatile__ (
+		"movec	%0, %%CACR\n\t"
+		"nop\n\t"
+		: : "r" (CACHE_INVALIDATED) );
+#else
+	/* Flush the write buffer */
+	__asm__ __volatile__ ( "nop" );
+#endif
+}
+
+/*
+ * Push cache entries at supplied address. We want to write back any dirty
+ * data and then invalidate the cache lines associated with this address.
+ */
+static inline void cache_push(unsigned long paddr, int len)
+{
+	__flush_cache_all();
+}
+
+/*
+ * Clear cache entries at supplied address (that is don't write back any
+ * dirty data).
+ */
+static inline void cache_clear(unsigned long paddr, int len)
+{
+	__clear_cache_all();
+}
+
+#endif /* _M68KNOMMU_CACHEFLUSH_H */