dev, arm: Render HDLCD frames at a fixed rate in KVM

Use the new fast scan-out API in the PixelPump to render frames at a
fixed frame rate in KVM mode. The refresh rate when running in KVM can
be controlled by the virt_refresh_rate parameter.

Change-Id: Ib3c78f174e3f8f4ca8a9b723c4e5d311a433b8aa
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/2242
Reviewed-by: Rahul Thakur <rjthakur@google.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/src/dev/arm/hdlcd.hh b/src/dev/arm/hdlcd.hh
index acce6f191..4bca0bbbf 100644
--- a/src/dev/arm/hdlcd.hh
+++ b/src/dev/arm/hdlcd.hh
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010-2013, 2015 ARM Limited
+ * Copyright (c) 2010-2013, 2015, 2017 ARM Limited
  * All rights reserved
  *
  * The license below extends only to copyright in the software and shall
@@ -116,6 +116,7 @@ class HDLcd: public AmbaDmaDevice
     const AddrRangeList addrRanges;
     const bool enableCapture;
     const Addr pixelBufferSize;
+    const Tick virtRefreshRate;
 
   protected: // Register handling
     /** ARM HDLcd register offsets */
@@ -344,6 +345,10 @@ class HDLcd: public AmbaDmaDevice
         HDLcd &parent;
     };
 
+    /** Handler for fast frame refresh in KVM-mode */
+    void virtRefresh();
+    EventWrapper<HDLcd, &HDLcd::virtRefresh> virtRefreshEvent;
+
     /** Helper to write out bitmaps */
     Bitmap bmp;