[intrng] Migrate the intrng code from sys/arm/arm to sys/kern/subr_intr.c.

The ci20 port (by kan@) is going to reuse almost all of the intrng code
since the SoC in question looks suspiciously like someone took an ARM
SoC design and replaced the ARM core with a MIPS core.

* migrate out the code;
* rename ARM_ -> INTR_;
* rename arm_ -> intr_;
* move the interrupt flush routine from intr.c / intrng.c into
  arm/machdep_intr.c - removing the code duplication and removing
  the ARM specific bits from here.

Thanks to the Star Wars: The Force Awakens premiere line for allowing
me a couple hours of quiet time to finish the universe builds.

Tested:

* make universe

TODO:

* The structure definitions in subr_intr.c still includes machine/intr.h
  which requires one duplicates all of the intrng definitions in
  the platform code (which kan has done, and I think we don't have to.)

  Instead I should break out the generic things (function declarations,
  common intr structures, etc) into a separate header.

* Kan has requested I make the PIC based IPI stuff optional.

1 files changed, 124 insertions, 0 deletions

diff --git a/sys/kern/pic_if.m b/sys/kern/pic_if.m
new file mode 100644
index 0000000..2309f0c
--- /dev/null
+++ b/sys/kern/pic_if.m
@@ -0,0 +1,124 @@
+#-
+# Copyright (c) 2012 Jakub Wojciech Klama <jceel@FreeBSD.org>
+# Copyright (c) 2015 Svatopluk Kraus
+# Copyright (c) 2015 Michal Meloun
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+# $FreeBSD$
+#
+
+#include <sys/bus.h>
+#include <sys/cpuset.h>
+#include <machine/frame.h>
+#include <machine/intr.h>
+
+INTERFACE pic;
+
+CODE {
+	static int null_pic_bind(device_t dev, struct intr_irqsrc *isrc)
+	{
+		return (EOPNOTSUPP);
+	}
+
+	static void null_pic_disable_intr(device_t dev, struct intr_irqsrc *isrc)
+	{
+		return;
+	}
+
+	static void null_pic_enable_intr(device_t dev, struct intr_irqsrc *isrc)
+	{
+		return;
+	}
+
+	static void null_pic_init_secondary(device_t dev)
+	{
+		return;
+	}
+
+	static void null_pic_ipi_send(device_t dev, cpuset_t cpus, u_int ipi)
+	{
+		return;
+	}
+};
+
+METHOD int register {
+	device_t		dev;
+	struct intr_irqsrc	*isrc;
+	boolean_t		*is_percpu;
+};
+
+METHOD int unregister {
+	device_t		dev;
+	struct intr_irqsrc	*isrc;
+};
+
+METHOD void disable_intr {
+	device_t		dev;
+	struct intr_irqsrc	*isrc;
+} DEFAULT null_pic_disable_intr;
+
+METHOD void disable_source {
+	device_t		dev;
+	struct intr_irqsrc	*isrc;
+};
+
+METHOD void enable_source {
+	device_t		dev;
+	struct intr_irqsrc	*isrc;
+};
+
+METHOD void enable_intr {
+	device_t		dev;
+	struct intr_irqsrc	*isrc;
+} DEFAULT null_pic_enable_intr;
+
+METHOD void pre_ithread {
+	device_t		dev;
+	struct intr_irqsrc	*isrc;
+};
+
+METHOD void post_ithread {
+	device_t		dev;
+	struct intr_irqsrc	*isrc;
+};
+
+METHOD void post_filter {
+	device_t		dev;
+	struct intr_irqsrc	*isrc;
+};
+
+METHOD int bind {
+	device_t		dev;
+	struct intr_irqsrc	*isrc;
+} DEFAULT null_pic_bind;
+
+METHOD void init_secondary {
+	device_t	dev;
+} DEFAULT null_pic_init_secondary;
+
+METHOD void ipi_send {
+	device_t		dev;
+	struct intr_irqsrc	*isrc;
+	cpuset_t		cpus;
+} DEFAULT null_pic_ipi_send;