riscv/processor.h

   1 #ifndef _RISCV_PROCESSOR_H
   2 #define _RISCV_PROCESSOR_H
   3
   4 #include "decode.h"
   5 #include <cstring>
   6 #include "trap.h"
   7 #include "mmu.h"
   8 #include "icsim.h"
   9
  10 #define MAX_UTS 2048
  11
  12 #define DISPATCH_TABLE_SIZE 1024
  13 class processor_t;
  14 typedef reg_t (*insn_func_t)(processor_t*, insn_t, reg_t);
  15
  16 class sim_t;
  17
  18 class processor_t
  19 {
  20 public:
  21   processor_t(sim_t* _sim, char* _mem, size_t _memsz);
  22   ~processor_t();
  23   void init(uint32_t _id, icsim_t* defualt_icache, icsim_t* default_dcache);
  24   void step(size_t n, bool noisy);
  25   void deliver_ipi();
  26
  27 private:
  28   sim_t* sim;
  29
  30   // architected state
  31   reg_t XPR[NXPR];
  32   freg_t FPR[NFPR];
  33
  34   // privileged control registers
  35   reg_t pc;
  36   reg_t epc;
  37   reg_t badvaddr;
  38   reg_t cause;
  39   reg_t evec;
  40   reg_t tohost;
  41   reg_t fromhost;
  42   reg_t pcr_k0;
  43   reg_t pcr_k1;
  44   uint32_t id;
  45   uint32_t sr;
  46   uint32_t count;
  47   uint32_t compare;
  48
  49   bool run;
  50
  51   // unprivileged control registers
  52   uint32_t fsr;
  53
  54   // # of bits in an XPR (32 or 64). (redundant with sr)
  55   int xprlen;
  56
  57   // shared memory
  58   mmu_t mmu;
  59
  60   // counters
  61   reg_t cycle;
  62
  63   // functions
  64   void reset();
  65   void take_interrupt();
  66   void set_sr(uint32_t val);
  67   void set_fsr(uint32_t val);
  68   void take_trap(trap_t t, bool noisy);
  69   void disasm(insn_t insn, reg_t pc);
  70
  71   // vector stuff
  72   void vcfg();
  73   void setvl(int vlapp);
  74
  75   reg_t vecbanks;
  76   uint32_t vecbanks_count;
  77
  78   bool utmode;
  79   int utidx;
  80   int vlmax;
  81   int vl;
  82   int nxfpr_bank;
  83   int nxpr_use;
  84   int nfpr_use;
  85   processor_t* uts[MAX_UTS];
  86
  87   // cache sim
  88   icsim_t* icsim;
  89   icsim_t* dcsim;
  90   icsim_t* itlbsim;
  91   icsim_t* dtlbsim;
  92
  93   friend class sim_t;
  94
  95   static insn_func_t dispatch_table[DISPATCH_TABLE_SIZE];
  96   reg_t dispatch(insn_t insn, reg_t pc);
  97   static void initialize_dispatch_table();
  98
  99   #define DECLARE_INSN(name, m, o) reg_t insn_func_ ## name (insn_t, reg_t);
 100   #include "opcodes.h"
 101   #undef DECLARE_INSN
 102 };
 103
 104 #endif