Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 105 insertions, 0 deletions

diff --git a/kernel/arch/frv/include/asm/cacheflush.h b/kernel/arch/frv/include/asm/cacheflush.h
new file mode 100644
index 000000000..edbac54ae
--- /dev/null
+++ b/kernel/arch/frv/include/asm/cacheflush.h
@@ -0,0 +1,105 @@
+/* cacheflush.h: FRV cache flushing routines
+ *
+ * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#ifndef _ASM_CACHEFLUSH_H
+#define _ASM_CACHEFLUSH_H
+
+/* Keep includes the same across arches.  */
+#include <linux/mm.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 flush_dcache_mmap_lock(mapping)		do {} while(0)
+#define flush_dcache_mmap_unlock(mapping)	do {} while(0)
+
+/*
+ * physically-indexed cache management
+ * - see arch/frv/lib/cache.S
+ */
+extern void frv_dcache_writeback(unsigned long start, unsigned long size);
+extern void frv_cache_invalidate(unsigned long start, unsigned long size);
+extern void frv_icache_invalidate(unsigned long start, unsigned long size);
+extern void frv_cache_wback_inv(unsigned long start, unsigned long size);
+
+static inline void __flush_cache_all(void)
+{
+	asm volatile("	dcef	@(gr0,gr0),#1	\n"
+		     "	icei	@(gr0,gr0),#1	\n"
+		     "	membar			\n"
+		     : : : "memory"
+		     );
+}
+
+/* dcache/icache coherency... */
+#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
+#ifdef CONFIG_MMU
+extern void flush_dcache_page(struct page *page);
+#else
+static inline void flush_dcache_page(struct page *page)
+{
+	unsigned long addr = page_to_phys(page);
+	frv_dcache_writeback(addr, addr + PAGE_SIZE);
+}
+#endif
+
+static inline void flush_page_to_ram(struct page *page)
+{
+	flush_dcache_page(page);
+}
+
+static inline void flush_icache(void)
+{
+	__flush_cache_all();
+}
+
+static inline void flush_icache_range(unsigned long start, unsigned long end)
+{
+	frv_cache_wback_inv(start, end);
+}
+
+#ifdef CONFIG_MMU
+extern void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
+				    unsigned long start, unsigned long len);
+#else
+static inline void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
+					   unsigned long start, unsigned long len)
+{
+	frv_cache_wback_inv(start, start + len);
+}
+#endif
+
+static inline void flush_icache_page(struct vm_area_struct *vma, struct page *page)
+{
+	flush_icache_user_range(vma, page, page_to_phys(page), PAGE_SIZE);
+}
+
+/*
+ * permit ptrace to access another process's address space through the icache
+ * and the dcache
+ */
+#define copy_to_user_page(vma, page, vaddr, dst, src, len)	\
+do {								\
+	memcpy((dst), (src), (len));				\
+	flush_icache_user_range((vma), (page), (vaddr), (len));	\
+} while(0)
+
+#define copy_from_user_page(vma, page, vaddr, dst, src, len)	\
+	memcpy((dst), (src), (len))
+
+#endif /* _ASM_CACHEFLUSH_H */