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, 52 insertions, 0 deletions

diff --git a/kernel/arch/arm/mach-omap1/include/mach/memory.h b/kernel/arch/arm/mach-omap1/include/mach/memory.h
new file mode 100644
index 000000000..058a4f7d4
--- /dev/null
+++ b/kernel/arch/arm/mach-omap1/include/mach/memory.h
@@ -0,0 +1,52 @@
+/*
+ * arch/arm/mach-omap1/include/mach/memory.h
+ */
+
+#ifndef __ASM_ARCH_MEMORY_H
+#define __ASM_ARCH_MEMORY_H
+
+/*
+ * Bus address is physical address, except for OMAP-1510 Local Bus.
+ * OMAP-1510 bus address is translated into a Local Bus address if the
+ * OMAP bus type is lbus. We do the address translation based on the
+ * device overriding the defaults used in the dma-mapping API.
+ * Note that the is_lbus_device() test is not very efficient on 1510
+ * because of the strncmp().
+ */
+#if defined(CONFIG_ARCH_OMAP15XX) && !defined(__ASSEMBLER__)
+#include <mach/soc.h>
+
+/*
+ * OMAP-1510 Local Bus address offset
+ */
+#define OMAP1510_LB_OFFSET	UL(0x30000000)
+
+#define virt_to_lbus(x)		((x) - PAGE_OFFSET + OMAP1510_LB_OFFSET)
+#define lbus_to_virt(x)		((x) - OMAP1510_LB_OFFSET + PAGE_OFFSET)
+#define is_lbus_device(dev)	(cpu_is_omap15xx() && dev && (strncmp(dev_name(dev), "ohci", 4) == 0))
+
+#define __arch_pfn_to_dma(dev, pfn)	\
+	({ dma_addr_t __dma = __pfn_to_phys(pfn); \
+	   if (is_lbus_device(dev)) \
+		__dma = __dma - PHYS_OFFSET + OMAP1510_LB_OFFSET; \
+	   __dma; })
+
+#define __arch_dma_to_pfn(dev, addr)	\
+	({ dma_addr_t __dma = addr;				\
+	   if (is_lbus_device(dev))				\
+		__dma += PHYS_OFFSET - OMAP1510_LB_OFFSET;	\
+	   __phys_to_pfn(__dma);				\
+	})
+
+#define __arch_dma_to_virt(dev, addr)	({ (void *) (is_lbus_device(dev) ? \
+						lbus_to_virt(addr) : \
+						__phys_to_virt(addr)); })
+
+#define __arch_virt_to_dma(dev, addr)	({ unsigned long __addr = (unsigned long)(addr); \
+					   (dma_addr_t) (is_lbus_device(dev) ? \
+						virt_to_lbus(__addr) : \
+						__virt_to_phys(__addr)); })
+
+#endif	/* CONFIG_ARCH_OMAP15XX */
+
+#endif