Add Avalon-MM emulator

1 files changed, 46 insertions, 0 deletions

diff --git a/tb/avalon.hpp b/tb/avalon.hpp
new file mode 100644
index 0000000..38c8792
--- /dev/null
+++ b/tb/avalon.hpp
@@ -0,0 +1,46 @@
+#ifndef AVALON_HPP
+#define AVALON_HPP
+
+#include <cstdint>
+#include <vector>
+
+namespace taller::avalon
+{
+	class slave
+	{
+		public:
+			virtual std::uint32_t base_address() = 0;
+			virtual std::uint32_t address_mask() = 0;
+
+			virtual bool read(std::uint32_t addr, std::uint32_t &data) = 0;
+			virtual bool write(std::uint32_t addr, std::uint32_t data, unsigned byte_enable) = 0;
+	};
+
+	template<class Platform>
+	class interconnect
+	{
+		public:
+			inline interconnect(Platform &plat) noexcept
+			: plat(plat)
+			{}
+
+			void tick();
+			void attach(slave &dev);
+
+		private:
+			struct binding
+			{
+				std::uint32_t base;
+				std::uint32_t mask;
+				slave         &dev;
+			};
+
+			Platform            &plat;
+			slave*               active = nullptr;
+			std::vector<binding> devices;
+	};
+}
+
+#include "avalon.impl.hpp"
+
+#endif