[src/trunk]: src/sys/arch/arm/cortex Don't bother dealing with "extra" ticks, ...

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

details:   https://anonhg.NetBSD.org/src/rev/ccdf66701b19
branches:  trunk
changeset: 781734:ccdf66701b19
user:      matt <matt%NetBSD.org@localhost>
date:      Thu Sep 27 00:23:27 2012 +0000

description:
Don't bother dealing with "extra" ticks, just count them.

diffstat:

 sys/arch/arm/cortex/a9tmr.c     |  12 ++++++++++--
 sys/arch/arm/cortex/a9tmr_var.h |   3 ++-
 2 files changed, 12 insertions(+), 3 deletions(-)

diffs (64 lines):

diff -r f76f87a426cf -r ccdf66701b19 sys/arch/arm/cortex/a9tmr.c
--- a/sys/arch/arm/cortex/a9tmr.c       Thu Sep 27 00:22:39 2012 +0000
+++ b/sys/arch/arm/cortex/a9tmr.c       Thu Sep 27 00:23:27 2012 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: a9tmr.c,v 1.2 2012/09/14 03:52:19 matt Exp $   */
+/*     $NetBSD: a9tmr.c,v 1.3 2012/09/27 00:23:27 matt Exp $   */
 
 /*-
  * Copyright (c) 2012 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: a9tmr.c,v 1.2 2012/09/14 03:52:19 matt Exp $");
+__KERNEL_RCSID(0, "$NetBSD: a9tmr.c,v 1.3 2012/09/27 00:23:27 matt Exp $");
 
 #include <sys/param.h>
 #include <sys/bus.h>
@@ -134,6 +134,9 @@
        sc->sc_memt = mpcaa->mpcaa_memt;
        sc->sc_memh = mpcaa->mpcaa_memh;
 
+       evcnt_attach_dynamic(&sc->sc_ev_missing_ticks, EVCNT_TYPE_MISC, NULL,
+           device_xname(self), "missing interrupts");
+
        bus_space_subregion(sc->sc_memt, sc->sc_memh, 
            TMR_GLOBAL_BASE, TMR_GLOBAL_BASE, &sc->sc_global_memh);
        bus_space_subregion(sc->sc_memt, sc->sc_memh, 
@@ -298,6 +301,7 @@
 
        hardclock(cf);
 
+#if 0
        /*
         * Try to make up up to a seconds amount of missed clock interrupts
         */
@@ -307,6 +311,10 @@
             delta -= sc->sc_autoinc, ticks--) {
                hardclock(cf);
        }
+#else
+       if (delta > sc->sc_autoinc)
+               sc->sc_ev_missing_ticks.ev_count += delta / sc->sc_autoinc;
+#endif
 
        return 1;
 }
diff -r f76f87a426cf -r ccdf66701b19 sys/arch/arm/cortex/a9tmr_var.h
--- a/sys/arch/arm/cortex/a9tmr_var.h   Thu Sep 27 00:22:39 2012 +0000
+++ b/sys/arch/arm/cortex/a9tmr_var.h   Thu Sep 27 00:23:27 2012 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: a9tmr_var.h,v 1.1 2012/09/01 00:03:14 matt Exp $ */
+/* $NetBSD: a9tmr_var.h,v 1.2 2012/09/27 00:23:27 matt Exp $ */
 /*-
  * Copyright (c) 2012 The NetBSD Foundation, Inc.
  * All rights reserved.
@@ -38,6 +38,7 @@
        bus_space_handle_t sc_global_memh;
        bus_space_handle_t sc_private_memh;
        bus_space_handle_t sc_wdog_memh;
+       struct evcnt sc_ev_missing_ticks;
        u_long sc_freq;
        u_long sc_autoinc;
        void *sc_global_ih;