Fix a bug caused by moving misa into state_t. (#180)

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

diff --git a/riscv/processor.h b/riscv/processor.h
index c294e5794853d7f69c4a60b1af139252205a65c5..ace86f963959145e3e8a7227f4fa2e91f0395e71 100644 (file)
--- a/riscv/processor.h
+++ b/riscv/processor.h
@@ -5,14 +5,16 @@
 #include "decode.h"
 #include "config.h"
 #include "devices.h"
+#include "trap.h"
 #include <string>
 #include <vector>
 #include <map>
+#include "debug_rom_defines.h"
 
 class processor_t;
 class mmu_t;
 typedef reg_t (*insn_func_t)(processor_t*, insn_t, reg_t);
-class sim_t;
+class simif_t;
 class trap_t;
 class extension_t;
 class disassembler_t;
@@ -28,7 +30,7 @@ struct insn_desc_t
 struct commit_log_reg_t
 {
   reg_t addr;
-  reg_t data;
+  freg_t data;
 };
 
 typedef struct
@@ -84,7 +86,7 @@ typedef struct
 // architectural state of a RISC-V hart
 struct state_t
 {
-  void reset();
+  void reset(reg_t max_isa);
 
   static const int num_triggers = 4;
 
@@ -94,9 +96,10 @@ struct state_t
 
   // control and status registers
   reg_t prv;    // TODO: Can this be an enum instead?
+  reg_t misa;
   reg_t mstatus;
   reg_t mepc;
-  reg_t mbadaddr;
+  reg_t mtval;
   reg_t mscratch;
   reg_t mtvec;
   reg_t mcause;
@@ -108,10 +111,10 @@ struct state_t
   uint32_t mcounteren;
   uint32_t scounteren;
   reg_t sepc;
-  reg_t sbadaddr;
+  reg_t stval;
   reg_t sscratch;
   reg_t stvec;
-  reg_t sptbr;
+  reg_t satp;
   reg_t scause;
   reg_t dpc;
   reg_t dscratch;
@@ -137,6 +140,8 @@ struct state_t
 #ifdef RISCV_ENABLE_COMMITLOG
   commit_log_reg_t log_reg_write;
   reg_t last_inst_priv;
+  int last_inst_xlen;
+  int last_inst_flen;
 #endif
 };
 
@@ -159,7 +164,7 @@ static int cto(reg_t val)
 class processor_t : public abstract_device_t
 {
 public:
-  processor_t(const char* isa, sim_t* sim, uint32_t id, bool halt_on_reset=false);
+  processor_t(const char* isa, simif_t* sim, uint32_t id, bool halt_on_reset=false);
   ~processor_t();
 
   void set_debug(bool value);
@@ -170,11 +175,24 @@ public:
   reg_t get_csr(int which);
   mmu_t* get_mmu() { return mmu; }
   state_t* get_state() { return &state; }
+  unsigned get_xlen() { return xlen; }
+  unsigned get_max_xlen() { return max_xlen; }
+  std::string get_isa_string() { return isa_string; }
+  unsigned get_flen() {
+    return supports_extension('Q') ? 128 :
+           supports_extension('D') ? 64 :
+           supports_extension('F') ? 32 : 0;
+  }
   extension_t* get_extension() { return ext; }
   bool supports_extension(unsigned char ext) {
     if (ext >= 'a' && ext <= 'z') ext += 'A' - 'a';
-    return ext >= 'A' && ext <= 'Z' && ((isa >> (ext - 'A')) & 1);
+    return ext >= 'A' && ext <= 'Z' && ((state.misa >> (ext - 'A')) & 1);
   }
+  void check_pc_alignment(reg_t pc) {
+    if (unlikely(pc & 2) && !supports_extension('C'))
+      throw trap_instruction_address_misaligned(pc);
+  }
+  reg_t legalize_privilege(reg_t);
   void set_privilege(reg_t);
   void yield_load_reservation() { state.load_reservation = (reg_t)-1; }
   void update_histogram(reg_t pc);
@@ -191,6 +209,8 @@ public:
   bool debug;
   // When true, take the slow simulation path.
   bool slow_path();
+  bool halted() { return state.dcsr.cause ? true : false; }
+  bool halt_request;
 
   // Return the index of a trigger that matched, or -1.
   inline int trigger_match(trigger_operation_t operation, reg_t address, reg_t data)
@@ -210,7 +230,6 @@ public:
           (operation == OPERATION_STORE && !state.mcontrol[i].store) ||
           (operation == OPERATION_LOAD && !state.mcontrol[i].load) ||
           (state.prv == PRV_M && !state.mcontrol[i].m) ||
-          (state.prv == PRV_H && !state.mcontrol[i].h) ||
           (state.prv == PRV_S && !state.mcontrol[i].s) ||
           (state.prv == PRV_U && !state.mcontrol[i].u)) {
         continue;
@@ -276,7 +295,7 @@ public:
   void trigger_updated();
 
 private:
-  sim_t* sim;
+  simif_t* sim;
   mmu_t* mmu; // main memory is always accessed via the mmu
   extension_t* ext;
   disassembler_t* disassembler;
@@ -284,7 +303,6 @@ private:
   uint32_t id;
   unsigned max_xlen;
   unsigned xlen;
-  reg_t isa;
   reg_t max_isa;
   std::string isa_string;
   bool histogram_enabled;
@@ -304,15 +322,17 @@ private:
 
   void enter_debug_mode(uint8_t cause);
 
-  friend class sim_t;
   friend class mmu_t;
-  friend class rtc_t;
+  friend class clint_t;
   friend class extension_t;
 
   void parse_isa_string(const char* isa);
   void build_opcode_map();
   void register_base_instructions();
   insn_func_t decode_insn(insn_t insn);
+
+  // Track repeated executions for processor_t::disasm()
+  uint64_t last_pc, last_bits, executions;
 };
 
 reg_t illegal_instruction(processor_t* p, insn_t insn, reg_t pc);