From 0cdc05c3d54bed174e300aca28d4a15c3116cd79 Mon Sep 17 00:00:00 2001
From: Daniel Krebs <github@daniel-krebs.net>
Date: Wed, 11 Jul 2018 16:06:48 +0200
Subject: [PATCH] rtds2gpu: add struct for memory layout of rtds2gpu buffer

---
 .../villas/fpga/ips/rtds2gpu/register_types.hpp       | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/fpga/include/villas/fpga/ips/rtds2gpu/register_types.hpp b/fpga/include/villas/fpga/ips/rtds2gpu/register_types.hpp
index b59a297c9..01cd68817 100644
--- a/fpga/include/villas/fpga/ips/rtds2gpu/register_types.hpp
+++ b/fpga/include/villas/fpga/ips/rtds2gpu/register_types.hpp
@@ -2,6 +2,7 @@
 #define REGISTER_TYPES_H
 
 #include <stdint.h>
+#include <cstddef>
 
 union axilite_reg_status_t {
 	uint32_t value;
@@ -27,4 +28,14 @@ union reg_doorbell_t {
 	};
 };
 
+template<size_t N, typename T = uint32_t>
+struct Rtds2GpuMemoryBuffer {
+	static constexpr size_t valueCount = N;
+	static constexpr size_t dataOffset = offsetof(Rtds2GpuMemoryBuffer, data);
+	static constexpr size_t doorbellOffset = offsetof(Rtds2GpuMemoryBuffer, doorbell);
+
+	T data[N];
+	reg_doorbell_t doorbell;
+} __attribute__((packed));
+
 #endif // REGISTER_TYPES_H