arm, kmi: Clear interrupts in KMI devices

Added functionality to check and clear interrupts for KMI
devices. This fixes a boot bug when using KVM and in-kernel GIC
emulation.

Change-Id: Ia3e91d07567b7faf3f82b0adfda4a165a502a339
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/2225
Reviewed-by: Rahul Thakur <rjthakur@google.com>

1 files changed, 8 insertions, 4 deletions

diff --git a/src/dev/arm/kmi.hh b/src/dev/arm/kmi.hh
index a321caf63..55e4b4285 100644
--- a/src/dev/arm/kmi.hh
+++ b/src/dev/arm/kmi.hh
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010 ARM Limited
+ * Copyright (c) 2010, 2017 ARM Limited
  * All rights reserved
  *
  * The license below extends only to copyright in the software and shall
@@ -101,9 +101,6 @@ class Pl050 : public AmbaIntDevice, public VncKeyboard, public VncMouse
         Bitfield<1> tx;
     EndBitUnion(InterruptReg)
 
-    /** interrupt status register. */
-    InterruptReg interrupts;
-
     /** raw interrupt register (unmasked) */
     InterruptReg rawInterrupts;
 
@@ -129,6 +126,13 @@ class Pl050 : public AmbaIntDevice, public VncKeyboard, public VncMouse
     /** Function to generate interrupt */
     void generateInterrupt();
 
+    /** Get interrupt value */
+    InterruptReg getInterrupt() const {
+        InterruptReg tmp_interrupt(0);
+        tmp_interrupt.tx = rawInterrupts.tx & control.txint_enable;
+        tmp_interrupt.rx = rawInterrupts.rx & control.rxint_enable;
+        return tmp_interrupt;
+    }
     /** Wrapper to create an event out of the thing */
     EventWrapper<Pl050, &Pl050::generateInterrupt> intEvent;