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, 121 insertions, 0 deletions

diff --git a/kernel/arch/mips/alchemy/devboards/db1xxx.c b/kernel/arch/mips/alchemy/devboards/db1xxx.c
new file mode 100644
index 000000000..2d47f9511
--- /dev/null
+++ b/kernel/arch/mips/alchemy/devboards/db1xxx.c
@@ -0,0 +1,121 @@
+/*
+ * Alchemy DB/PB1xxx board support.
+ */
+
+#include <asm/mach-au1x00/au1000.h>
+#include <asm/mach-db1x00/bcsr.h>
+
+int __init db1000_board_setup(void);
+int __init db1000_dev_setup(void);
+int __init db1500_pci_setup(void);
+int __init db1200_board_setup(void);
+int __init db1200_dev_setup(void);
+int __init db1300_board_setup(void);
+int __init db1300_dev_setup(void);
+int __init db1550_board_setup(void);
+int __init db1550_dev_setup(void);
+int __init db1550_pci_setup(int);
+
+static const char *board_type_str(void)
+{
+	switch (BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI))) {
+	case BCSR_WHOAMI_DB1000:
+		return "DB1000";
+	case BCSR_WHOAMI_DB1500:
+		return "DB1500";
+	case BCSR_WHOAMI_DB1100:
+		return "DB1100";
+	case BCSR_WHOAMI_PB1500:
+	case BCSR_WHOAMI_PB1500R2:
+		return "PB1500";
+	case BCSR_WHOAMI_PB1100:
+		return "PB1100";
+	case BCSR_WHOAMI_PB1200_DDR1:
+	case BCSR_WHOAMI_PB1200_DDR2:
+		return "PB1200";
+	case BCSR_WHOAMI_DB1200:
+		return "DB1200";
+	case BCSR_WHOAMI_DB1300:
+		return "DB1300";
+	case BCSR_WHOAMI_DB1550:
+		return "DB1550";
+	case BCSR_WHOAMI_PB1550_SDR:
+	case BCSR_WHOAMI_PB1550_DDR:
+		return "PB1550";
+	default:
+		return "(unknown)";
+	}
+}
+
+const char *get_system_type(void)
+{
+	return board_type_str();
+}
+
+void __init board_setup(void)
+{
+	int ret;
+
+	switch (alchemy_get_cputype()) {
+	case ALCHEMY_CPU_AU1000:
+	case ALCHEMY_CPU_AU1500:
+	case ALCHEMY_CPU_AU1100:
+		ret = db1000_board_setup();
+		break;
+	case ALCHEMY_CPU_AU1550:
+		ret = db1550_board_setup();
+		break;
+	case ALCHEMY_CPU_AU1200:
+		ret = db1200_board_setup();
+		break;
+	case ALCHEMY_CPU_AU1300:
+		ret = db1300_board_setup();
+		break;
+	default:
+		pr_err("unsupported CPU on board\n");
+		ret = -ENODEV;
+	}
+	if (ret)
+		panic("cannot initialize board support");
+}
+
+static int __init db1xxx_arch_init(void)
+{
+	int id = BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI));
+	if (id == BCSR_WHOAMI_DB1550)
+		return db1550_pci_setup(0);
+	else if ((id == BCSR_WHOAMI_PB1550_SDR) ||
+		 (id == BCSR_WHOAMI_PB1550_DDR))
+		return db1550_pci_setup(1);
+	else if ((id == BCSR_WHOAMI_DB1500) || (id == BCSR_WHOAMI_PB1500) ||
+		 (id == BCSR_WHOAMI_PB1500R2))
+		return db1500_pci_setup();
+
+	return 0;
+}
+arch_initcall(db1xxx_arch_init);
+
+static int __init db1xxx_dev_init(void)
+{
+	switch (BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI))) {
+	case BCSR_WHOAMI_DB1000:
+	case BCSR_WHOAMI_DB1500:
+	case BCSR_WHOAMI_DB1100:
+	case BCSR_WHOAMI_PB1500:
+	case BCSR_WHOAMI_PB1500R2:
+	case BCSR_WHOAMI_PB1100:
+		return db1000_dev_setup();
+	case BCSR_WHOAMI_PB1200_DDR1:
+	case BCSR_WHOAMI_PB1200_DDR2:
+	case BCSR_WHOAMI_DB1200:
+		return db1200_dev_setup();
+	case BCSR_WHOAMI_DB1300:
+		return db1300_dev_setup();
+	case BCSR_WHOAMI_DB1550:
+	case BCSR_WHOAMI_PB1550_SDR:
+	case BCSR_WHOAMI_PB1550_DDR:
+		return db1550_dev_setup();
+	}
+	return 0;
+}
+device_initcall(db1xxx_dev_init);