From e09b41010ba33a20a87472ee821fa407a5b8da36 Mon Sep 17 00:00:00 2001
From: José Pekkarinen <jose.pekkarinen@nokia.com>
Date: Mon, 11 Apr 2016 10:41:07 +0300
Subject: These changes are the raw update to linux-4.4.6-rt14. Kernel sources
 are taken from kernel.org, and rt patch from the rt wiki download page.
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During the rebasing, the following patch collided:

Force tick interrupt and get rid of softirq magic(I70131fb85).

Collisions have been removed because its logic was found on the
source already.

Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
---
 kernel/arch/mips/loongson64/fuloong-2e/Makefile |  5 ++
 kernel/arch/mips/loongson64/fuloong-2e/irq.c    | 69 +++++++++++++++++++++++++
 kernel/arch/mips/loongson64/fuloong-2e/reset.c  | 23 +++++++++
 3 files changed, 97 insertions(+)
 create mode 100644 kernel/arch/mips/loongson64/fuloong-2e/Makefile
 create mode 100644 kernel/arch/mips/loongson64/fuloong-2e/irq.c
 create mode 100644 kernel/arch/mips/loongson64/fuloong-2e/reset.c

(limited to 'kernel/arch/mips/loongson64/fuloong-2e')

diff --git a/kernel/arch/mips/loongson64/fuloong-2e/Makefile b/kernel/arch/mips/loongson64/fuloong-2e/Makefile
new file mode 100644
index 000000000..b7622720c
--- /dev/null
+++ b/kernel/arch/mips/loongson64/fuloong-2e/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for Lemote Fuloong2e mini-PC board.
+#
+
+obj-y += irq.o reset.o
diff --git a/kernel/arch/mips/loongson64/fuloong-2e/irq.c b/kernel/arch/mips/loongson64/fuloong-2e/irq.c
new file mode 100644
index 000000000..892963f86
--- /dev/null
+++ b/kernel/arch/mips/loongson64/fuloong-2e/irq.c
@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2007 Lemote Inc. & Institute of Computing Technology
+ * Author: Fuxin Zhang, zhangfx@lemote.com
+ *
+ *  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.
+ */
+#include <linux/interrupt.h>
+
+#include <asm/irq_cpu.h>
+#include <asm/i8259.h>
+
+#include <loongson.h>
+
+static void i8259_irqdispatch(void)
+{
+	int irq;
+
+	irq = i8259_irq();
+	if (irq >= 0)
+		do_IRQ(irq);
+	else
+		spurious_interrupt();
+}
+
+asmlinkage void mach_irq_dispatch(unsigned int pending)
+{
+	if (pending & CAUSEF_IP7)
+		do_IRQ(MIPS_CPU_IRQ_BASE + 7);
+	else if (pending & CAUSEF_IP6) /* perf counter loverflow */
+		do_perfcnt_IRQ();
+	else if (pending & CAUSEF_IP5)
+		i8259_irqdispatch();
+	else if (pending & CAUSEF_IP2)
+		bonito_irqdispatch();
+	else
+		spurious_interrupt();
+}
+
+static struct irqaction cascade_irqaction = {
+	.handler = no_action,
+	.name = "cascade",
+	.flags = IRQF_NO_THREAD,
+};
+
+void __init mach_init_irq(void)
+{
+	/* init all controller
+	 *   0-15	  ------> i8259 interrupt
+	 *   16-23	  ------> mips cpu interrupt
+	 *   32-63	  ------> bonito irq
+	 */
+
+	/* most bonito irq should be level triggered */
+	LOONGSON_INTEDGE = LOONGSON_ICU_SYSTEMERR | LOONGSON_ICU_MASTERERR |
+	    LOONGSON_ICU_RETRYERR | LOONGSON_ICU_MBOXES;
+
+	/* Sets the first-level interrupt dispatcher. */
+	mips_cpu_irq_init();
+	init_i8259_irqs();
+	bonito_irq_init();
+
+	/* bonito irq at IP2 */
+	setup_irq(MIPS_CPU_IRQ_BASE + 2, &cascade_irqaction);
+	/* 8259 irq at IP5 */
+	setup_irq(MIPS_CPU_IRQ_BASE + 5, &cascade_irqaction);
+}
diff --git a/kernel/arch/mips/loongson64/fuloong-2e/reset.c b/kernel/arch/mips/loongson64/fuloong-2e/reset.c
new file mode 100644
index 000000000..da4d2ae2a
--- /dev/null
+++ b/kernel/arch/mips/loongson64/fuloong-2e/reset.c
@@ -0,0 +1,23 @@
+/* Board-specific reboot/shutdown routines
+ * Copyright (c) 2009 Philippe Vachon <philippe@cowpig.ca>
+ *
+ * Copyright (C) 2009 Lemote Inc.
+ * Author: Wu Zhangjin, wuzhangjin@gmail.com
+ *
+ * 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.
+ */
+
+#include <loongson.h>
+
+void mach_prepare_reboot(void)
+{
+	LOONGSON_GENCFG &= ~(1 << 2);
+	LOONGSON_GENCFG |= (1 << 2);
+}
+
+void mach_prepare_shutdown(void)
+{
+}
-- 
cgit 1.2.3-korg