v4.19.13 snapshot.
diff --git a/arch/c6x/include/asm/cacheflush.h b/arch/c6x/include/asm/cacheflush.h
new file mode 100644
index 0000000..df5db90
--- /dev/null
+++ b/arch/c6x/include/asm/cacheflush.h
@@ -0,0 +1,65 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_CACHEFLUSH_H
+#define _ASM_C6X_CACHEFLUSH_H
+
+#include <linux/spinlock.h>
+
+#include <asm/setup.h>
+#include <asm/cache.h>
+#include <asm/mman.h>
+#include <asm/page.h>
+#include <asm/string.h>
+
+/*
+ * virtually-indexed cache management (our cache is physically indexed)
+ */
+#define flush_cache_all() do {} while (0)
+#define flush_cache_mm(mm) do {} while (0)
+#define flush_cache_dup_mm(mm) do {} while (0)
+#define flush_cache_range(mm, start, end) do {} while (0)
+#define flush_cache_page(vma, vmaddr, pfn) do {} while (0)
+#define flush_cache_vmap(start, end) do {} while (0)
+#define flush_cache_vunmap(start, end) do {} while (0)
+#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)
+
+/*
+ * physically-indexed cache management
+ */
+#define flush_icache_range(s, e) \
+do { \
+ L1D_cache_block_writeback((s), (e)); \
+ L1P_cache_block_invalidate((s), (e)); \
+} while (0)
+
+#define flush_icache_page(vma, page) \
+do { \
+ if ((vma)->vm_flags & PROT_EXEC) \
+ L1D_cache_block_writeback_invalidate(page_address(page), \
+ (unsigned long) page_address(page) + PAGE_SIZE)); \
+ L1P_cache_block_invalidate(page_address(page), \
+ (unsigned long) page_address(page) + PAGE_SIZE)); \
+} while (0)
+
+
+#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
+do { \
+ memcpy(dst, src, len); \
+ flush_icache_range((unsigned) (dst), (unsigned) (dst) + (len)); \
+} while (0)
+
+#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
+ memcpy(dst, src, len)
+
+#endif /* _ASM_C6X_CACHEFLUSH_H */