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, 59 insertions, 0 deletions

diff --git a/kernel/arch/sh/include/asm/mmu_context_32.h b/kernel/arch/sh/include/asm/mmu_context_32.h
new file mode 100644
index 000000000..10e2e1721
--- /dev/null
+++ b/kernel/arch/sh/include/asm/mmu_context_32.h
@@ -0,0 +1,59 @@
+#ifndef __ASM_SH_MMU_CONTEXT_32_H
+#define __ASM_SH_MMU_CONTEXT_32_H
+
+/*
+ * Destroy context related info for an mm_struct that is about
+ * to be put to rest.
+ */
+static inline void destroy_context(struct mm_struct *mm)
+{
+	/* Do nothing */
+}
+
+#ifdef CONFIG_CPU_HAS_PTEAEX
+static inline void set_asid(unsigned long asid)
+{
+	__raw_writel(asid, MMU_PTEAEX);
+}
+
+static inline unsigned long get_asid(void)
+{
+	return __raw_readl(MMU_PTEAEX) & MMU_CONTEXT_ASID_MASK;
+}
+#else
+static inline void set_asid(unsigned long asid)
+{
+	unsigned long __dummy;
+
+	__asm__ __volatile__ ("mov.l	%2, %0\n\t"
+			      "and	%3, %0\n\t"
+			      "or	%1, %0\n\t"
+			      "mov.l	%0, %2"
+			      : "=&r" (__dummy)
+			      : "r" (asid), "m" (__m(MMU_PTEH)),
+			        "r" (0xffffff00));
+}
+
+static inline unsigned long get_asid(void)
+{
+	unsigned long asid;
+
+	__asm__ __volatile__ ("mov.l	%1, %0"
+			      : "=r" (asid)
+			      : "m" (__m(MMU_PTEH)));
+	asid &= MMU_CONTEXT_ASID_MASK;
+	return asid;
+}
+#endif /* CONFIG_CPU_HAS_PTEAEX */
+
+/* MMU_TTB is used for optimizing the fault handling. */
+static inline void set_TTB(pgd_t *pgd)
+{
+	__raw_writel((unsigned long)pgd, MMU_TTB);
+}
+
+static inline pgd_t *get_TTB(void)
+{
+	return (pgd_t *)__raw_readl(MMU_TTB);
+}
+#endif /* __ASM_SH_MMU_CONTEXT_32_H */