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>

8 files changed, 434 insertions, 0 deletions

diff --git a/kernel/arch/arm/mach-highbank/Kconfig b/kernel/arch/arm/mach-highbank/Kconfig
new file mode 100644
index 000000000..31aa866c3
--- /dev/null
+++ b/kernel/arch/arm/mach-highbank/Kconfig
@@ -0,0 +1,18 @@
+config ARCH_HIGHBANK
+	bool "Calxeda ECX-1000/2000 (Highbank/Midway)" if ARCH_MULTI_V7
+	select ARCH_DMA_ADDR_T_64BIT if ARM_LPAE
+	select ARCH_HAS_HOLES_MEMORYMODEL
+	select ARCH_SUPPORTS_BIG_ENDIAN
+	select ARM_AMBA
+	select ARM_ERRATA_764369 if SMP
+	select ARM_ERRATA_775420
+	select ARM_ERRATA_798181 if SMP
+	select ARM_GIC
+	select ARM_PSCI
+	select ARM_TIMER_SP804
+	select CACHE_L2X0
+	select HAVE_ARM_SCU
+	select HAVE_ARM_TWD if SMP
+	select MAILBOX
+	select PL320_MBOX
+	select ZONE_DMA if ARM_LPAE
diff --git a/kernel/arch/arm/mach-highbank/Makefile b/kernel/arch/arm/mach-highbank/Makefile
new file mode 100644
index 000000000..55840f414
--- /dev/null
+++ b/kernel/arch/arm/mach-highbank/Makefile
@@ -0,0 +1,6 @@
+obj-y					:= highbank.o system.o smc.o
+
+plus_sec := $(call as-instr,.arch_extension sec,+sec)
+AFLAGS_smc.o				:=-Wa,-march=armv7-a$(plus_sec)
+
+obj-$(CONFIG_PM_SLEEP)			+= pm.o
diff --git a/kernel/arch/arm/mach-highbank/core.h b/kernel/arch/arm/mach-highbank/core.h
new file mode 100644
index 000000000..7ec5edcd1
--- /dev/null
+++ b/kernel/arch/arm/mach-highbank/core.h
@@ -0,0 +1,17 @@
+#ifndef __HIGHBANK_CORE_H
+#define __HIGHBANK_CORE_H
+
+#include <linux/reboot.h>
+
+extern void highbank_restart(enum reboot_mode, const char *);
+extern void __iomem *scu_base_addr;
+
+#ifdef CONFIG_PM_SLEEP
+extern void highbank_pm_init(void);
+#else
+static inline void highbank_pm_init(void) {}
+#endif
+
+extern void highbank_smc1(int fn, int arg);
+
+#endif
diff --git a/kernel/arch/arm/mach-highbank/highbank.c b/kernel/arch/arm/mach-highbank/highbank.c
new file mode 100644
index 000000000..231fba0d0
--- /dev/null
+++ b/kernel/arch/arm/mach-highbank/highbank.c
@@ -0,0 +1,189 @@
+/*
+ * Copyright 2010-2011 Calxeda, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/clk.h>
+#include <linux/clkdev.h>
+#include <linux/clocksource.h>
+#include <linux/dma-mapping.h>
+#include <linux/input.h>
+#include <linux/io.h>
+#include <linux/irqchip.h>
+#include <linux/pl320-ipc.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/of_address.h>
+#include <linux/reboot.h>
+#include <linux/amba/bus.h>
+#include <linux/platform_device.h>
+
+#include <asm/psci.h>
+#include <asm/hardware/cache-l2x0.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+
+#include "core.h"
+#include "sysregs.h"
+
+void __iomem *sregs_base;
+void __iomem *scu_base_addr;
+
+static void __init highbank_scu_map_io(void)
+{
+	unsigned long base;
+
+	/* Get SCU base */
+	asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (base));
+
+	scu_base_addr = ioremap(base, SZ_4K);
+}
+
+
+static void highbank_l2c310_write_sec(unsigned long val, unsigned reg)
+{
+	if (reg == L2X0_CTRL)
+		highbank_smc1(0x102, val);
+	else
+		WARN_ONCE(1, "Highbank L2C310: ignoring write to reg 0x%x\n",
+			  reg);
+}
+
+static void __init highbank_init_irq(void)
+{
+	irqchip_init();
+
+	if (of_find_compatible_node(NULL, NULL, "arm,cortex-a9"))
+		highbank_scu_map_io();
+}
+
+static void highbank_power_off(void)
+{
+	highbank_set_pwr_shutdown();
+
+	while (1)
+		cpu_do_idle();
+}
+
+static int highbank_platform_notifier(struct notifier_block *nb,
+				  unsigned long event, void *__dev)
+{
+	struct resource *res;
+	int reg = -1;
+	u32 val;
+	struct device *dev = __dev;
+
+	if (event != BUS_NOTIFY_ADD_DEVICE)
+		return NOTIFY_DONE;
+
+	if (of_device_is_compatible(dev->of_node, "calxeda,hb-ahci"))
+		reg = 0xc;
+	else if (of_device_is_compatible(dev->of_node, "calxeda,hb-sdhci"))
+		reg = 0x18;
+	else if (of_device_is_compatible(dev->of_node, "arm,pl330"))
+		reg = 0x20;
+	else if (of_device_is_compatible(dev->of_node, "calxeda,hb-xgmac")) {
+		res = platform_get_resource(to_platform_device(dev),
+					    IORESOURCE_MEM, 0);
+		if (res) {
+			if (res->start == 0xfff50000)
+				reg = 0;
+			else if (res->start == 0xfff51000)
+				reg = 4;
+		}
+	}
+
+	if (reg < 0)
+		return NOTIFY_DONE;
+
+	if (of_property_read_bool(dev->of_node, "dma-coherent")) {
+		val = readl(sregs_base + reg);
+		writel(val | 0xff01, sregs_base + reg);
+		set_dma_ops(dev, &arm_coherent_dma_ops);
+	}
+
+	return NOTIFY_OK;
+}
+
+static struct notifier_block highbank_amba_nb = {
+	.notifier_call = highbank_platform_notifier,
+};
+
+static struct notifier_block highbank_platform_nb = {
+	.notifier_call = highbank_platform_notifier,
+};
+
+static struct platform_device highbank_cpuidle_device = {
+	.name = "cpuidle-calxeda",
+};
+
+static int hb_keys_notifier(struct notifier_block *nb, unsigned long event, void *data)
+{
+	u32 key = *(u32 *)data;
+
+	if (event != 0x1000)
+		return 0;
+
+	if (key == KEY_POWER)
+		orderly_poweroff(false);
+	else if (key == 0xffff)
+		ctrl_alt_del();
+
+	return 0;
+}
+static struct notifier_block hb_keys_nb = {
+	.notifier_call = hb_keys_notifier,
+};
+
+static void __init highbank_init(void)
+{
+	struct device_node *np;
+
+	/* Map system registers */
+	np = of_find_compatible_node(NULL, NULL, "calxeda,hb-sregs");
+	sregs_base = of_iomap(np, 0);
+	WARN_ON(!sregs_base);
+
+	pm_power_off = highbank_power_off;
+	highbank_pm_init();
+
+	bus_register_notifier(&platform_bus_type, &highbank_platform_nb);
+	bus_register_notifier(&amba_bustype, &highbank_amba_nb);
+
+	pl320_ipc_register_notifier(&hb_keys_nb);
+
+	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+
+	if (psci_ops.cpu_suspend)
+		platform_device_register(&highbank_cpuidle_device);
+}
+
+static const char *const highbank_match[] __initconst = {
+	"calxeda,highbank",
+	"calxeda,ecx-2000",
+	NULL,
+};
+
+DT_MACHINE_START(HIGHBANK, "Highbank")
+#if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE)
+	.dma_zone_size	= (4ULL * SZ_1G),
+#endif
+	.l2c_aux_val	= 0,
+	.l2c_aux_mask	= ~0,
+	.l2c_write_sec	= highbank_l2c310_write_sec,
+	.init_irq	= highbank_init_irq,
+	.init_machine	= highbank_init,
+	.dt_compat	= highbank_match,
+	.restart	= highbank_restart,
+MACHINE_END
diff --git a/kernel/arch/arm/mach-highbank/pm.c b/kernel/arch/arm/mach-highbank/pm.c
new file mode 100644
index 000000000..7f2bd85eb
--- /dev/null
+++ b/kernel/arch/arm/mach-highbank/pm.c
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2011 Calxeda, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/cpu_pm.h>
+#include <linux/init.h>
+#include <linux/suspend.h>
+
+#include <asm/suspend.h>
+#include <asm/psci.h>
+
+static int highbank_suspend_finish(unsigned long val)
+{
+	const struct psci_power_state ps = {
+		.type = PSCI_POWER_STATE_TYPE_POWER_DOWN,
+		.affinity_level = 1,
+	};
+
+	return psci_ops.cpu_suspend(ps, __pa(cpu_resume));
+}
+
+static int highbank_pm_enter(suspend_state_t state)
+{
+	cpu_pm_enter();
+	cpu_cluster_pm_enter();
+
+	cpu_suspend(0, highbank_suspend_finish);
+
+	cpu_cluster_pm_exit();
+	cpu_pm_exit();
+
+	return 0;
+}
+
+static const struct platform_suspend_ops highbank_pm_ops = {
+	.enter = highbank_pm_enter,
+	.valid = suspend_valid_only_mem,
+};
+
+void __init highbank_pm_init(void)
+{
+	if (!psci_ops.cpu_suspend)
+		return;
+
+	suspend_set_ops(&highbank_pm_ops);
+}
diff --git a/kernel/arch/arm/mach-highbank/smc.S b/kernel/arch/arm/mach-highbank/smc.S
new file mode 100644
index 000000000..407d17baa
--- /dev/null
+++ b/kernel/arch/arm/mach-highbank/smc.S
@@ -0,0 +1,27 @@
+/*
+ * Copied from omap44xx-smc.S Copyright (C) 2010 Texas Instruments, Inc.
+ * Copyright 2012 Calxeda, Inc.
+ *
+ * This program is free software,you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/linkage.h>
+
+/*
+ * This is common routine to manage secure monitor API
+ * used to modify the PL310 secure registers.
+ * 'r0' contains the value to be modified and 'r12' contains
+ * the monitor API number.
+ * Function signature : void highbank_smc1(u32 fn, u32 arg)
+ */
+
+ENTRY(highbank_smc1)
+	stmfd   sp!, {r4-r11, lr}
+	mov	r12, r0
+	mov 	r0, r1
+	dsb
+	smc	#0
+	ldmfd   sp!, {r4-r11, pc}
+ENDPROC(highbank_smc1)
diff --git a/kernel/arch/arm/mach-highbank/sysregs.h b/kernel/arch/arm/mach-highbank/sysregs.h
new file mode 100644
index 000000000..5995df7f2
--- /dev/null
+++ b/kernel/arch/arm/mach-highbank/sysregs.h
@@ -0,0 +1,86 @@
+/*
+ * Copyright 2011 Calxeda, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _MACH_HIGHBANK__SYSREGS_H_
+#define _MACH_HIGHBANK__SYSREGS_H_
+
+#include <linux/io.h>
+#include <linux/smp.h>
+#include <asm/smp_plat.h>
+#include <asm/smp_scu.h>
+#include "core.h"
+
+extern void __iomem *sregs_base;
+
+#define HB_SREG_A9_PWR_REQ		0xf00
+#define HB_SREG_A9_BOOT_STAT		0xf04
+#define HB_SREG_A9_BOOT_DATA		0xf08
+
+#define HB_PWR_SUSPEND			0
+#define HB_PWR_SOFT_RESET		1
+#define HB_PWR_HARD_RESET		2
+#define HB_PWR_SHUTDOWN			3
+
+#define SREG_CPU_PWR_CTRL(c)		(0x200 + ((c) * 4))
+
+static inline void highbank_set_core_pwr(void)
+{
+	int cpu = MPIDR_AFFINITY_LEVEL(cpu_logical_map(smp_processor_id()), 0);
+	if (scu_base_addr)
+		scu_power_mode(scu_base_addr, SCU_PM_POWEROFF);
+	else
+		writel_relaxed(1, sregs_base + SREG_CPU_PWR_CTRL(cpu));
+}
+
+static inline void highbank_clear_core_pwr(void)
+{
+	int cpu = MPIDR_AFFINITY_LEVEL(cpu_logical_map(smp_processor_id()), 0);
+	if (scu_base_addr)
+		scu_power_mode(scu_base_addr, SCU_PM_NORMAL);
+	else
+		writel_relaxed(0, sregs_base + SREG_CPU_PWR_CTRL(cpu));
+}
+
+static inline void highbank_set_pwr_suspend(void)
+{
+	writel(HB_PWR_SUSPEND, sregs_base + HB_SREG_A9_PWR_REQ);
+	highbank_set_core_pwr();
+}
+
+static inline void highbank_set_pwr_shutdown(void)
+{
+	writel(HB_PWR_SHUTDOWN, sregs_base + HB_SREG_A9_PWR_REQ);
+	highbank_set_core_pwr();
+}
+
+static inline void highbank_set_pwr_soft_reset(void)
+{
+	writel(HB_PWR_SOFT_RESET, sregs_base + HB_SREG_A9_PWR_REQ);
+	highbank_set_core_pwr();
+}
+
+static inline void highbank_set_pwr_hard_reset(void)
+{
+	writel(HB_PWR_HARD_RESET, sregs_base + HB_SREG_A9_PWR_REQ);
+	highbank_set_core_pwr();
+}
+
+static inline void highbank_clear_pwr_request(void)
+{
+	writel(~0UL, sregs_base + HB_SREG_A9_PWR_REQ);
+	highbank_clear_core_pwr();
+}
+
+#endif
diff --git a/kernel/arch/arm/mach-highbank/system.c b/kernel/arch/arm/mach-highbank/system.c
new file mode 100644
index 000000000..2df5870b7
--- /dev/null
+++ b/kernel/arch/arm/mach-highbank/system.c
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2011 Calxeda, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/io.h>
+#include <asm/proc-fns.h>
+#include <linux/reboot.h>
+
+#include "core.h"
+#include "sysregs.h"
+
+void highbank_restart(enum reboot_mode mode, const char *cmd)
+{
+	if (mode == REBOOT_HARD)
+		highbank_set_pwr_hard_reset();
+	else
+		highbank_set_pwr_soft_reset();
+
+	while (1)
+		cpu_do_idle();
+}
+