Generalize IPI support for ARM intrng and use it for interrupt

controller IPI provider.

New struct intr_ipi is defined which keeps all info about an IPI:
its name, counter, send and dispatch methods. Generic intr_ipi_setup(),
intr_ipi_send() and intr_ipi_dispatch() functions are implemented.

An IPI provider must implement two functions:
(1) an intr_ipi_send_t function which is able to send an IPI,
(2) a setup function which initializes itself for an IPI and
    calls intr_ipi_setup() with appropriate arguments.

Differential Revision:	https://reviews.freebsd.org/D5700

1 files changed, 13 insertions, 0 deletions

diff --git a/sys/kern/pic_if.m b/sys/kern/pic_if.m
index 2309f0c9fd9f..04d5f5f1afad 100644
--- a/sys/kern/pic_if.m
+++ b/sys/kern/pic_if.m
@@ -60,6 +60,13 @@ CODE {
 	{
 		return;
 	}
+
+	static int
+	dflt_pic_ipi_setup(device_t dev, u_int ipi, struct intr_irqsrc *isrc)
+	{
+
+		return (EOPNOTSUPP);
+	}
 };
 
 METHOD int register {
@@ -122,3 +129,9 @@ METHOD void ipi_send {
 	struct intr_irqsrc	*isrc;
 	cpuset_t		cpus;
 } DEFAULT null_pic_ipi_send;
+
+METHOD int ipi_setup {
+	device_t		dev;
+	u_int			ipi;
+	struct intr_irqsrc	*isrc;
+} DEFAULT dflt_pic_ipi_setup;