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, 88 insertions, 0 deletions

diff --git a/kernel/arch/blackfin/kernel/sys_bfin.c b/kernel/arch/blackfin/kernel/sys_bfin.c
new file mode 100644
index 000000000..d998383cb
--- /dev/null
+++ b/kernel/arch/blackfin/kernel/sys_bfin.c
@@ -0,0 +1,88 @@
+/*
+ * contains various random system calls that have a non-standard
+ * calling sequence on the Linux/Blackfin platform.
+ *
+ * Copyright 2004-2009 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later
+ */
+
+#include <linux/spinlock.h>
+#include <linux/sem.h>
+#include <linux/msg.h>
+#include <linux/shm.h>
+#include <linux/syscalls.h>
+#include <linux/mman.h>
+#include <linux/file.h>
+#include <linux/fs.h>
+#include <linux/uaccess.h>
+#include <linux/ipc.h>
+#include <linux/unistd.h>
+
+#include <asm/cacheflush.h>
+#include <asm/dma.h>
+#include <asm/cachectl.h>
+#include <asm/ptrace.h>
+
+asmlinkage void *sys_sram_alloc(size_t size, unsigned long flags)
+{
+	return sram_alloc_with_lsl(size, flags);
+}
+
+asmlinkage int sys_sram_free(const void *addr)
+{
+	return sram_free_with_lsl(addr);
+}
+
+asmlinkage void *sys_dma_memcpy(void *dest, const void *src, size_t len)
+{
+	return safe_dma_memcpy(dest, src, len);
+}
+
+#if defined(CONFIG_FB) || defined(CONFIG_FB_MODULE)
+#include <linux/fb.h>
+#include <linux/export.h>
+unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr,
+	unsigned long len, unsigned long pgoff, unsigned long flags)
+{
+	struct fb_info *info = filp->private_data;
+	return (unsigned long)info->screen_base;
+}
+EXPORT_SYMBOL(get_fb_unmapped_area);
+#endif
+
+/* Needed for legacy userspace atomic emulation */
+static DEFINE_SPINLOCK(bfin_spinlock_lock);
+
+#ifdef CONFIG_SYS_BFIN_SPINLOCK_L1
+__attribute__((l1_text))
+#endif
+asmlinkage int sys_bfin_spinlock(int *p)
+{
+	int ret, tmp = 0;
+
+	spin_lock(&bfin_spinlock_lock); /* This would also hold kernel preemption. */
+	ret = get_user(tmp, p);
+	if (likely(ret == 0)) {
+		if (unlikely(tmp))
+			ret = 1;
+		else
+			put_user(1, p);
+	}
+	spin_unlock(&bfin_spinlock_lock);
+
+	return ret;
+}
+
+SYSCALL_DEFINE3(cacheflush, unsigned long, addr, unsigned long, len, int, op)
+{
+	if (is_user_addr_valid(current, addr, len) != 0)
+		return -EINVAL;
+
+	if (op & DCACHE)
+		blackfin_dcache_flush_range(addr, addr + len);
+	if (op & ICACHE)
+		blackfin_icache_flush_range(addr, addr + len);
+
+	return 0;
+}