[src/trunk]: src/sys/arch/powerpc/booke Allow to share IPI interrupt.

[nonaka <nonaka%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/663d0da9e6b1
branches:  trunk
changeset: 335772:663d0da9e6b1
user:      nonaka <nonaka%NetBSD.org@localhost>
date:      Fri Jan 23 06:16:23 2015 +0000

description:
Allow to share IPI interrupt.

diffstat:

 sys/arch/powerpc/booke/e500_intr.c |  24 ++++++++++++++++++++----
 1 files changed, 20 insertions(+), 4 deletions(-)

diffs (66 lines):

diff -r 0aed1c714202 -r 663d0da9e6b1 sys/arch/powerpc/booke/e500_intr.c
--- a/sys/arch/powerpc/booke/e500_intr.c        Fri Jan 23 04:46:53 2015 +0000
+++ b/sys/arch/powerpc/booke/e500_intr.c        Fri Jan 23 06:16:23 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: e500_intr.c,v 1.29 2015/01/05 07:40:05 nonaka Exp $    */
+/*     $NetBSD: e500_intr.c,v 1.30 2015/01/23 06:16:23 nonaka Exp $    */
 /*-
  * Copyright (c) 2010, 2011 The NetBSD Foundation, Inc.
  * All rights reserved.
@@ -39,7 +39,7 @@
 #define __INTR_PRIVATE
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: e500_intr.c,v 1.29 2015/01/05 07:40:05 nonaka Exp $");
+__KERNEL_RCSID(0, "$NetBSD: e500_intr.c,v 1.30 2015/01/23 06:16:23 nonaka Exp $");
 
 #include <sys/param.h>
 #include <sys/proc.h>
@@ -83,6 +83,7 @@
        int8_t is_ipl;
        uint8_t is_ist;
        uint8_t is_irq;
+       uint8_t is_refcnt;
        bus_size_t is_vpr;
        bus_size_t is_dr;
 };
@@ -737,8 +738,16 @@
        struct intr_source * const is = &e500_intr_sources[ii.irq_vector];
        mutex_enter(&e500_intr_lock);
        if (is->is_ipl != IPL_NONE) {
-               mutex_exit(&e500_intr_lock);
-               return NULL;
+               /* XXX IPI0 is shared by all CPU. */
+               if (is->is_ist != IST_IPI ||
+                   is->is_irq != irq ||
+                   is->is_ipl != ipl ||
+                   is->is_ist != ist ||
+                   is->is_func != handler ||
+                   is->is_arg != arg) {
+                       mutex_exit(&e500_intr_lock);
+                       return NULL;
+               }
        }
 
        is->is_func = handler;
@@ -746,6 +755,7 @@
        is->is_ipl = ipl;
        is->is_ist = ist;
        is->is_irq = irq;
+       is->is_refcnt++;
        is->is_vpr = ii.irq_vpr;
        is->is_dr = ii.irq_dr;
 
@@ -812,6 +822,12 @@
        KASSERT(is - e500_intr_sources == ii.irq_vector);
 
        mutex_enter(&e500_intr_lock);
+
+       if (is->is_refcnt-- > 1) {
+               mutex_exit(&e500_intr_lock);
+               return;
+       }
+
        /*
         * Mask the source using the mask (MSK) bit in the vector/priority reg.
         */