Flush icache when using swbps and report to gdb.

[riscv-isa-sim.git] / riscv / processor.h

diff --git a/riscv/processor.h b/riscv/processor.h
index 3adf9903471f24846420d92aa5da9f9b56f83cf0..869873fffe7e9100e336f6229940de36aa6626b5 100644 (file)
--- a/riscv/processor.h
+++ b/riscv/processor.h
@@ -73,6 +73,15 @@ struct state_t
 #endif
 };
 
+typedef enum {
+      HR_NONE,
+      HR_STEPPED,       // A single step was completed
+      HR_SWBP,          // sbreak was executed
+      HR_INTERRUPT,     // Execution interrupted by debugger
+      HR_CMDLINE,       // Command line requested that the processor start halted
+      HR_ATTACHED       // Halted because a debugger attached
+} halt_reason_t;
+
 // this class represents one processor in a RISC-V machine.
 class processor_t : public abstract_device_t
 {
@@ -81,6 +90,8 @@ public:
   ~processor_t();
 
   void set_debug(bool value);
+  void set_halted(bool value, halt_reason_t reason);
+  void set_single_step(bool value);
   void set_histogram(bool value);
   void reset(bool value);
   void step(size_t n); // run for n cycles
@@ -118,7 +129,14 @@ private:
   reg_t isa;
   std::string isa_string;
   bool run; // !reset
+  // When true, display disassembly of each instruction that's executed.
   bool debug;
+  // TODO: Should this just be rolled into `run`?
+  bool halted;  // When true, no instructions are executed.
+  halt_reason_t halt_reason;        // Why is halted true?
+  // When true, execute exactly one instruction (even if halted is true), then
+  // set halted to true and single_step to false.
+  bool single_step;
   bool histogram_enabled;
 
   std::vector<insn_desc_t> instructions;