#include "decode.h"
#include "config.h"
#include "devices.h"
+#include "trap.h"
#include <string>
#include <vector>
#include <map>
-#include "debug_rom/debug_rom_defines.h"
+#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;
// architectural state of a RISC-V hart
struct state_t
{
- void reset();
+ void reset(reg_t max_isa);
static const int num_triggers = 4;
// 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;
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;
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);
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 :
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 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;
uint32_t id;
unsigned max_xlen;
unsigned xlen;
- reg_t isa;
reg_t max_isa;
std::string isa_string;
bool histogram_enabled;
void enter_debug_mode(uint8_t cause);
- friend class sim_t;
friend class mmu_t;
friend class clint_t;
friend class extension_t;