[rtems commit] bsp/arm: SMP support for a9mpcore_clock_cleanup()
Sebastian Huber
sebh at rtems.org
Thu Mar 13 15:15:49 UTC 2014
Module: rtems
Branch: master
Commit: 34568acf68aa8894c4e81a1528e850e97d6dd834
Changeset: http://git.rtems.org/rtems/commit/?id=34568acf68aa8894c4e81a1528e850e97d6dd834
Author: Ralf Kirchner <ralf.kirchner at embedded-brains.de>
Date: Wed Mar 5 09:14:59 2014 +0100
bsp/arm: SMP support for a9mpcore_clock_cleanup()
---
.../libbsp/arm/shared/arm-a9mpcore-clock-config.c | 22 ++++++++++++++++---
1 files changed, 18 insertions(+), 4 deletions(-)
diff --git a/c/src/lib/libbsp/arm/shared/arm-a9mpcore-clock-config.c b/c/src/lib/libbsp/arm/shared/arm-a9mpcore-clock-config.c
index e32657d..f2ffd5f 100644
--- a/c/src/lib/libbsp/arm/shared/arm-a9mpcore-clock-config.c
+++ b/c/src/lib/libbsp/arm/shared/arm-a9mpcore-clock-config.c
@@ -105,17 +105,31 @@ CPU_Counter_ticks _CPU_Counter_read(void)
return gt->cntrlower;
}
-static void a9mpcore_clock_cleanup(void)
+static void a9mpcore_clock_cleanup_isr(void *arg)
{
volatile a9mpcore_gt *gt = A9MPCORE_GT;
- rtems_status_code sc;
+
+ (void) arg;
gt->ctrl &= A9MPCORE_GT_CTRL_TMR_EN;
gt->irqst = A9MPCORE_GT_IRQST_EFLG;
+}
- sc = rtems_interrupt_handler_remove(
+static void a9mpcore_clock_cleanup(void)
+{
+ rtems_status_code sc;
+
+ /*
+ * The relevant registers / bits of the global timer are banked and chances
+ * are on an SPM system, that we are executing on the wrong CPU to reset
+ * them. Thus we will have the actual cleanup done with the next clock tick.
+ * The ISR will execute on the right CPU for the cleanup.
+ */
+ sc = rtems_interrupt_handler_install(
A9MPCORE_IRQ_GT,
- (rtems_interrupt_handler) Clock_isr,
+ "Clock",
+ RTEMS_INTERRUPT_REPLACE,
+ a9mpcore_clock_cleanup_isr,
NULL
);
if (sc != RTEMS_SUCCESSFUL) {
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