score: Distribute clock tick to all online CPUs

Update #2554.

2 files changed, 20 insertions, 6 deletions

diff --git a/c/src/lib/libbsp/i386/pc386/clock/ckinit.c b/c/src/lib/libbsp/i386/pc386/clock/ckinit.c
index 04514d19fa..2291839dd5 100644
--- a/c/src/lib/libbsp/i386/pc386/clock/ckinit.c
+++ b/c/src/lib/libbsp/i386/pc386/clock/ckinit.c
@@ -65,11 +65,10 @@ extern volatile uint32_t Clock_driver_ticks;
   } while (0)
 
 
-/*
- *  Hooks which get swapped based upon which nanoseconds since last
- *  tick method is preferred.
- */
-#define Clock_driver_support_at_tick()
+#ifdef RTEMS_SMP
+#define Clock_driver_support_at_tick() \
+  _SMP_Send_message_broadcast(SMP_MESSAGE_CLOCK_TICK)
+#endif
 
 #define Clock_driver_support_install_isr( _new, _old ) \
   do { \
@@ -203,6 +202,12 @@ void Clock_driver_install_handler(void)
   clockOn();
 }
 
+#define Clock_driver_support_set_interrupt_affinity(online_processors) \
+  do { \
+    /* FIXME: Is there a way to do this on x86? */ \
+    (void) online_processors; \
+  } while (0)
+
 void Clock_driver_support_initialize_hardware(void)
 {
   bool use_tsc = false;
diff --git a/c/src/lib/libbsp/i386/shared/smp/smp-imps.c b/c/src/lib/libbsp/i386/shared/smp/smp-imps.c
index ca1a0f134a..1ed504ccf9 100644
--- a/c/src/lib/libbsp/i386/shared/smp/smp-imps.c
+++ b/c/src/lib/libbsp/i386/shared/smp/smp-imps.c
@@ -744,13 +744,22 @@ static void smp_apic_ack(void)
   IMPS_LAPIC_WRITE(LAPIC_EOI, 0 );     /* ACK the interrupt */
 }
 
+/* FIXME: There should be a header file for this */
+void Clock_isr(void *arg);
+
 static void bsp_inter_processor_interrupt(void *arg)
 {
+  unsigned long message;
+
   (void) arg;
 
   smp_apic_ack();
 
-  _SMP_Inter_processor_interrupt_handler();
+  message = _SMP_Inter_processor_interrupt_handler();
+
+  if ((message & SMP_MESSAGE_CLOCK_TICK) != 0) {
+    Clock_isr(NULL);
+  }
 }
 
 static void ipi_install_irq(void)