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>

2 files changed, 134 insertions, 0 deletions

diff --git a/kernel/arch/mips/pnx833x/stb22x/Makefile b/kernel/arch/mips/pnx833x/stb22x/Makefile
new file mode 100644
index 000000000..7b580060d
--- /dev/null
+++ b/kernel/arch/mips/pnx833x/stb22x/Makefile
@@ -0,0 +1 @@
+obj-y := board.o
diff --git a/kernel/arch/mips/pnx833x/stb22x/board.c b/kernel/arch/mips/pnx833x/stb22x/board.c
new file mode 100644
index 000000000..2ac520343
--- /dev/null
+++ b/kernel/arch/mips/pnx833x/stb22x/board.c
@@ -0,0 +1,133 @@
+/*
+ *  board.c: STB225 board support.
+ *
+ *  Copyright 2008 NXP Semiconductors
+ *	  Chris Steel <chris.steel@nxp.com>
+ *    Daniel Laird <daniel.j.laird@nxp.com>
+ *
+ *  Based on software written by:
+ *	Nikita Youshchenko <yoush@debian.org>, based on PNX8550 code.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <linux/init.h>
+#include <asm/bootinfo.h>
+#include <linux/mm.h>
+#include <pnx833x.h>
+#include <gpio.h>
+
+/* endianess twiddlers */
+#define PNX8335_DEBUG0 0x4400
+#define PNX8335_DEBUG1 0x4404
+#define PNX8335_DEBUG2 0x4408
+#define PNX8335_DEBUG3 0x440c
+#define PNX8335_DEBUG4 0x4410
+#define PNX8335_DEBUG5 0x4414
+#define PNX8335_DEBUG6 0x4418
+#define PNX8335_DEBUG7 0x441c
+
+int prom_argc;
+char **prom_argv, **prom_envp;
+
+extern void prom_init_cmdline(void);
+extern char *prom_getenv(char *envname);
+
+const char *get_system_type(void)
+{
+	return "NXP STB22x";
+}
+
+static inline unsigned long env_or_default(char *env, unsigned long dfl)
+{
+	char *str = prom_getenv(env);
+	return str ? simple_strtol(str, 0, 0) : dfl;
+}
+
+void __init prom_init(void)
+{
+	unsigned long memsize;
+
+	prom_argc = fw_arg0;
+	prom_argv = (char **)fw_arg1;
+	prom_envp = (char **)fw_arg2;
+
+	prom_init_cmdline();
+
+	memsize = env_or_default("memsize", 0x02000000);
+	add_memory_region(0, memsize, BOOT_MEM_RAM);
+}
+
+void __init pnx833x_board_setup(void)
+{
+	pnx833x_gpio_select_function_alt(4);
+	pnx833x_gpio_select_output(4);
+	pnx833x_gpio_select_function_alt(5);
+	pnx833x_gpio_select_input(5);
+	pnx833x_gpio_select_function_alt(6);
+	pnx833x_gpio_select_input(6);
+	pnx833x_gpio_select_function_alt(7);
+	pnx833x_gpio_select_output(7);
+
+	pnx833x_gpio_select_function_alt(25);
+	pnx833x_gpio_select_function_alt(26);
+
+	pnx833x_gpio_select_function_alt(27);
+	pnx833x_gpio_select_function_alt(28);
+	pnx833x_gpio_select_function_alt(29);
+	pnx833x_gpio_select_function_alt(30);
+	pnx833x_gpio_select_function_alt(31);
+	pnx833x_gpio_select_function_alt(32);
+	pnx833x_gpio_select_function_alt(33);
+
+#if IS_ENABLED(CONFIG_MTD_NAND_PLATFORM)
+	/* Setup MIU for NAND access on CS0...
+	 *
+	 * (it seems that we must also configure CS1 for reliable operation,
+	 * otherwise the first read ID command will fail if it's read as 4 bytes
+	 * but pass if it's read as 1 word.)
+	 */
+
+	/* Setup MIU CS0 & CS1 timing */
+	PNX833X_MIU_SEL0 = 0;
+	PNX833X_MIU_SEL1 = 0;
+	PNX833X_MIU_SEL0_TIMING = 0x50003081;
+	PNX833X_MIU_SEL1_TIMING = 0x50003081;
+
+	/* Setup GPIO 00 for use as MIU CS1 (CS0 is not multiplexed, so does not need this) */
+	pnx833x_gpio_select_function_alt(0);
+
+	/* Setup GPIO 04 to input NAND read/busy signal */
+	pnx833x_gpio_select_function_io(4);
+	pnx833x_gpio_select_input(4);
+
+	/* Setup GPIO 05 to disable NAND write protect */
+	pnx833x_gpio_select_function_io(5);
+	pnx833x_gpio_select_output(5);
+	pnx833x_gpio_write(1, 5);
+
+#elif IS_ENABLED(CONFIG_MTD_CFI)
+
+	/* Set up MIU for 16-bit NOR access on CS0 and CS1... */
+
+	/* Setup MIU CS0 & CS1 timing */
+	PNX833X_MIU_SEL0 = 1;
+	PNX833X_MIU_SEL1 = 1;
+	PNX833X_MIU_SEL0_TIMING = 0x6A08D082;
+	PNX833X_MIU_SEL1_TIMING = 0x6A08D082;
+
+	/* Setup GPIO 00 for use as MIU CS1 (CS0 is not multiplexed, so does not need this) */
+	pnx833x_gpio_select_function_alt(0);
+#endif
+}