[src/trunk]: src/sys/arch/arm/imx Assume reads from hardware do something eve...

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

details:   https://anonhg.NetBSD.org/src/rev/4848dc10d40b
branches:  trunk
changeset: 327537:4848dc10d40b
user:      skrll <skrll%NetBSD.org@localhost>
date:      Mon Mar 10 09:35:18 2014 +0000

description:
Assume reads from hardware do something even if the result isn't required.

Hi htodd@!

diffstat:

 sys/arch/arm/imx/imx51_tzic.c |  8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diffs (33 lines):

diff -r 6f80b1cccb6f -r 4848dc10d40b sys/arch/arm/imx/imx51_tzic.c
--- a/sys/arch/arm/imx/imx51_tzic.c     Mon Mar 10 08:45:30 2014 +0000
+++ b/sys/arch/arm/imx/imx51_tzic.c     Mon Mar 10 09:35:18 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: imx51_tzic.c,v 1.5 2014/03/10 04:25:51 htodd Exp $     */
+/*     $NetBSD: imx51_tzic.c,v 1.6 2014/03/10 09:35:18 skrll Exp $     */
 
 /*-
  * Copyright (c) 2010 SHIMIZU Ryo <ryo%nerv.org@localhost>
@@ -26,7 +26,7 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: imx51_tzic.c,v 1.5 2014/03/10 04:25:51 htodd Exp $");
+__KERNEL_RCSID(0, "$NetBSD: imx51_tzic.c,v 1.6 2014/03/10 09:35:18 skrll Exp $");
 
 #define        _INTR_PRIVATE   /* for arm/pic/picvar.h */
 
@@ -262,10 +262,14 @@
 
        disable_interrupts(I32_bit|F32_bit);
 
+       (void) INTC_READ(tzic, TZIC_INTCNTL);
        INTC_WRITE(tzic, TZIC_INTCNTL, INTCNTL_NSEN_MASK|INTCNTL_NSEN|INTCNTL_EN);
+       (void) INTC_READ(tzic, TZIC_INTCNTL);
        INTC_WRITE(tzic, TZIC_PRIOMASK, SW_TO_HW_IPL(IPL_NONE));
+       (void) INTC_READ(tzic, TZIC_PRIOMASK);
 
        INTC_WRITE(tzic, TZIC_SYNCCTRL, 0x00);
+       (void) INTC_READ(tzic, TZIC_SYNCCTRL);
 
        /* route all interrupts to IRQ.  secure interrupts are for FIQ */
        for (i = 0; i < 4; i++)