BeagleBoardPkg: Ensure there is no pending IRQ and disable timer

When the BeagleBoard UEFI is started from a 1st (or 2nd stage) boot loader
it is possible there are still some pending IRQ.
Clean the interrupts before starting the BeagleBoard UEFI.



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12034 6f19259b-4bc3-4df7-8a09-765794883524

2 files changed, 12 insertions, 2 deletions

diff --git a/BeagleBoardPkg/Library/BeagleBoardLib/BeagleBoard.c b/BeagleBoardPkg/Library/BeagleBoardLib/BeagleBoard.c
index a74b60d91..5a40ccea9 100755
--- a/BeagleBoardPkg/Library/BeagleBoardLib/BeagleBoard.c
+++ b/BeagleBoardPkg/Library/BeagleBoardLib/BeagleBoard.c
@@ -17,6 +17,8 @@
 #include <Library/DebugLib.h>
 #include <Library/PcdLib.h>
 
+#include <Omap3530/Omap3530.h>
+
 VOID
 PadConfiguration (
   VOID
@@ -101,12 +103,21 @@ ArmPlatformGetBootMode (
 VOID
 ArmPlatformNormalInitialize (
   VOID
-  ) {
+  )
+{
   //Set up Pin muxing.
   PadConfiguration ();
 
   // Set up system clocking
   ClockInit ();
+
+  // Turn off the functional clock for Timer 3
+  MmioAnd32 (CM_FCLKEN_PER, 0xFFFFFFFF ^ CM_ICLKEN_PER_EN_GPT3_ENABLE );
+  ArmDataSyncronizationBarrier ();
+
+  // Clear IRQs
+  MmioWrite32 (INTCPS_CONTROL, INTCPS_CONTROL_NEWIRQAGR);
+  ArmDataSyncronizationBarrier ();
 }
 
 /**
diff --git a/BeagleBoardPkg/Library/BeagleBoardLib/Clock.c b/BeagleBoardPkg/Library/BeagleBoardLib/Clock.c
index 8de24f851..1985a6bfb 100755
--- a/BeagleBoardPkg/Library/BeagleBoardLib/Clock.c
+++ b/BeagleBoardPkg/Library/BeagleBoardLib/Clock.c
@@ -46,7 +46,6 @@ ClockInit (
 

   // Turn on functional & interface clocks to various Peripherals.

   MmioOr32(CM_FCLKEN_PER, CM_FCLKEN_PER_EN_UART3_ENABLE

-                          | CM_FCLKEN_PER_EN_GPT3_ENABLE

                           | CM_FCLKEN_PER_EN_GPT4_ENABLE

                           | CM_FCLKEN_PER_EN_GPIO2_ENABLE

                           | CM_FCLKEN_PER_EN_GPIO3_ENABLE