Implement RoCC and add a dummy RoCC

Enable it with --extension=dummy

1 files changed, 29 insertions, 0 deletions

diff --git a/riscv/extension.cc b/riscv/extension.cc
new file mode 100644
index 0000000..718ef6d
--- /dev/null
+++ b/riscv/extension.cc
@@ -0,0 +1,29 @@
+#include "extension.h"
+#include "trap.h"
+#include "dummy-rocc.h"
+
+std::map<std::string, std::function<extension_t*()>>& extensions()
+{
+  static std::map<std::string, std::function<extension_t*()>> v;
+  return v;
+}
+
+extension_t::~extension_t()
+{
+}
+
+void extension_t::illegal_instruction()
+{
+  throw trap_illegal_instruction();
+}
+
+void extension_t::raise_interrupt()
+{
+  p->set_interrupt(IRQ_COP, true);
+  p->take_interrupt();
+}
+
+void extension_t::clear_interrupt()
+{
+  p->set_interrupt(IRQ_COP, false);
+}