From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001
From: Yunhong Jiang <yunhong.jiang@intel.com>
Date: Tue, 4 Aug 2015 12:17:53 -0700
Subject: 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>
---
 kernel/arch/metag/include/asm/global_lock.h | 100 ++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 kernel/arch/metag/include/asm/global_lock.h

(limited to 'kernel/arch/metag/include/asm/global_lock.h')

diff --git a/kernel/arch/metag/include/asm/global_lock.h b/kernel/arch/metag/include/asm/global_lock.h
new file mode 100644
index 000000000..fc831c88c
--- /dev/null
+++ b/kernel/arch/metag/include/asm/global_lock.h
@@ -0,0 +1,100 @@
+#ifndef __ASM_METAG_GLOBAL_LOCK_H
+#define __ASM_METAG_GLOBAL_LOCK_H
+
+#include <asm/metag_mem.h>
+
+/**
+ * __global_lock1() - Acquire global voluntary lock (LOCK1).
+ * @flags:	Variable to store flags into.
+ *
+ * Acquires the Meta global voluntary lock (LOCK1), also taking care to disable
+ * all triggers so we cannot be interrupted, and to enforce a compiler barrier
+ * so that the compiler cannot reorder memory accesses across the lock.
+ *
+ * No other hardware thread will be able to acquire the voluntary or exclusive
+ * locks until the voluntary lock is released with @__global_unlock1, but they
+ * may continue to execute as long as they aren't trying to acquire either of
+ * the locks.
+ */
+#define __global_lock1(flags) do {					\
+	unsigned int __trval;						\
+	asm volatile("MOV	%0,#0\n\t"				\
+		     "SWAP	%0,TXMASKI\n\t"				\
+		     "LOCK1"						\
+		     : "=r" (__trval)					\
+		     :							\
+		     : "memory");					\
+	(flags) = __trval;						\
+} while (0)
+
+/**
+ * __global_unlock1() - Release global voluntary lock (LOCK1).
+ * @flags:	Variable to restore flags from.
+ *
+ * Releases the Meta global voluntary lock (LOCK1) acquired with
+ * @__global_lock1, also taking care to re-enable triggers, and to enforce a
+ * compiler barrier so that the compiler cannot reorder memory accesses across
+ * the unlock.
+ *
+ * This immediately allows another hardware thread to acquire the voluntary or
+ * exclusive locks.
+ */
+#define __global_unlock1(flags) do {					\
+	unsigned int __trval = (flags);					\
+	asm volatile("LOCK0\n\t"					\
+		     "MOV	TXMASKI,%0"				\
+		     :							\
+		     : "r" (__trval)					\
+		     : "memory");					\
+} while (0)
+
+/**
+ * __global_lock2() - Acquire global exclusive lock (LOCK2).
+ * @flags:	Variable to store flags into.
+ *
+ * Acquires the Meta global voluntary lock and global exclusive lock (LOCK2),
+ * also taking care to disable all triggers so we cannot be interrupted, to take
+ * the atomic lock (system event) and to enforce a compiler barrier so that the
+ * compiler cannot reorder memory accesses across the lock.
+ *
+ * No other hardware thread will be able to execute code until the locks are
+ * released with @__global_unlock2.
+ */
+#define __global_lock2(flags) do {					\
+	unsigned int __trval;						\
+	unsigned int __aloc_hi = LINSYSEVENT_WR_ATOMIC_LOCK & 0xFFFF0000; \
+	asm volatile("MOV	%0,#0\n\t"				\
+		     "SWAP	%0,TXMASKI\n\t"				\
+		     "LOCK2\n\t"					\
+		     "SETD	[%1+#0x40],D1RtP"			\
+		     : "=r&" (__trval)					\
+		     : "u" (__aloc_hi)					\
+		     : "memory");					\
+	(flags) = __trval;						\
+} while (0)
+
+/**
+ * __global_unlock2() - Release global exclusive lock (LOCK2).
+ * @flags:	Variable to restore flags from.
+ *
+ * Releases the Meta global exclusive lock (LOCK2) and global voluntary lock
+ * acquired with @__global_lock2, also taking care to release the atomic lock
+ * (system event), re-enable triggers, and to enforce a compiler barrier so that
+ * the compiler cannot reorder memory accesses across the unlock.
+ *
+ * This immediately allows other hardware threads to continue executing and one
+ * of them to acquire locks.
+ */
+#define __global_unlock2(flags) do {					\
+	unsigned int __trval = (flags);					\
+	unsigned int __alock_hi = LINSYSEVENT_WR_ATOMIC_LOCK & 0xFFFF0000; \
+	asm volatile("SETD	[%1+#0x00],D1RtP\n\t"			\
+		     "LOCK0\n\t"					\
+		     "MOV	TXMASKI,%0"				\
+		     :							\
+		     : "r" (__trval),					\
+		       "u" (__alock_hi)					\
+		     : "memory");					\
+} while (0)
+
+#endif /* __ASM_METAG_GLOBAL_LOCK_H */
-- 
cgit 1.2.3-korg