occamy: Connect chip_id to SoC regs (pulp-platform/snitch#298)

* Add preloading flag to `fesvr`

* Add `chip_id` to SoC regs

* lint: C++ sources

target/common/test/rtl_lib.cc

@@ -25,6 +25,12 @@ namespace sim {
 void sim_thread_main(void *arg) { ((Sim *)arg)->main(); }
 
 Sim::Sim(int argc, char **argv) : htif_t(argc, argv) {
+    for (auto i = 1; i < argc; ++i) {
+        if (strcmp(argv[i], "--disable_preloading") == 0) {
+            printf("fesvr-based binary preloading disabled\n");
+            disable_preloading = true;
+        }
+    }
     host = context_t::current();
     target.init(sim_thread_main, this);
     target.switch_to();

target/common/test/sim.hh

@@ -29,6 +29,9 @@ struct Sim : htif_t {
     // HTIF overrides. Calls into the global memory.
     void read_chunk(addr_t taddr, size_t len, void *dst);
     void write_chunk(addr_t taddr, size_t len, const void *src);
+    bool is_address_preloaded(addr_t taddr, size_t len) override {
+        return disable_preloading;
+    }
 
     void idle();
 
@@ -43,6 +46,7 @@ struct Sim : htif_t {
     context_t *host;
     context_t target;
     bool vlt_vcd = false;
+    bool disable_preloading = false;
 };
 
 void sim_thread_main(void *arg);