adding support for verilator-driven AFU driver: vlsim

driver/opae/vlsim/opae_sim.h

@@ -0,0 +1,87 @@
+#pragma once
+
+#include "Vvortex_afu_shim.h"
+#include "Vvortex_afu_shim__Syms.h"
+#include "verilated.h"
+
+#ifdef VCD_OUTPUT
+#include <verilated_vcd_c.h>
+#endif
+
+#include <VX_config.h>
+#include "ram.h"
+
+#include <ostream>
+#include <future>
+#include <vector>
+
+class opae_sim {
+public:
+  
+  opae_sim();
+  virtual ~opae_sim();
+
+  void prepare_buffer(uint64_t len, void **buf_addr, uint64_t *wsid, int flags);
+
+  void release_buffer(uint64_t wsid);
+
+  void get_io_address(uint64_t wsid, uint64_t *ioaddr);
+
+  void write_mmio64(uint32_t mmio_num, uint64_t offset, uint64_t value);
+
+  void read_mmio64(uint32_t mmio_num, uint64_t offset, uint64_t *value);
+
+private: 
+
+  typedef struct {
+    int cycles_left;  
+    std::array<uint8_t, GLOBAL_BLOCK_SIZE> block;
+    unsigned tag;
+  } dram_rd_req_t;
+
+  typedef struct {
+    int cycles_left;  
+    std::array<uint8_t, GLOBAL_BLOCK_SIZE> block;
+    unsigned mdata;
+  } cci_rd_req_t;
+
+  typedef struct {
+    int cycles_left;  
+    std::array<uint8_t, GLOBAL_BLOCK_SIZE> block;
+    unsigned mdata;
+  } cci_wr_req_t;
+
+  typedef struct {    
+    uint8_t* data;
+    size_t size;  
+  } host_alloc_t;
+
+  void reset();
+
+  void eval();
+
+  void step();
+
+  void sRxPort_bus();
+  void sTxPort_bus();
+  void avs_bus();
+
+  uint8_t* find_host_ptr(uint64_t addr);
+
+  std::future<void> future_;
+  bool stop_;
+
+  std::vector<host_alloc_t> host_allocs_;
+
+  std::vector<dram_rd_req_t> dram_reads_;
+
+  std::vector<cci_rd_req_t> cci_reads_;
+
+  std::vector<cci_wr_req_t> cci_writes_;
+
+  RAM ram_;
+  Vvortex_afu_shim *vortex_afu_;
+#ifdef VCD_OUTPUT
+  VerilatedVcdC *trace_;
+#endif
+};