[WIP] first working version

gen_input/minres_rv.core_desc

@@ -6,7 +6,7 @@ import "RVC.core_desc"
 import "RVF.core_desc"
 import "RVD.core_desc"
 
-Core MNRV32 provides RV32I/*, RV32IC */ {
+Core MNRV32 provides RV32I, RV32IC {
     constants {
         XLEN:=32;
         PCLEN:=32;
@@ -17,7 +17,7 @@ Core MNRV32 provides RV32I/*, RV32IC */ {
         PGMASK := 0xfff; //PGSIZE-1
     }
 }
-
+/*
 Core RV32IMAC provides RV32I, RV32M, RV32A, RV32IC {
     constants {
         XLEN:=32;
@@ -67,4 +67,4 @@ Core RV64GC provides RV64I, RV64M, RV64A, RV64F, RV64D, RV64IC, RV32FC, RV32DC {
         PGMASK := 0xfff; //PGSIZE-1
     }
 }
-
+*/

gen_input/templates/interp/vm-vm_CORENAME.cpp.gtl

@@ -83,8 +83,7 @@ protected:
 
     inline const char *name(size_t index){return traits<ARCH>::reg_aliases.at(index);}
 
-
-    virt_addr_t execute_single_inst(virt_addr_t pc) override;
+    virt_addr_t execute_inst(virt_addr_t start, std::function<bool(void)> pred) override;
 
     // some compile time constants
     // enum { MASK16 = 0b1111110001100011, MASK32 = 0b11111111111100000111000001111111 };
@@ -138,6 +137,24 @@ protected:
         return lut_val;
     }
 
+    void raise_trap(uint16_t trap_id, uint16_t cause){
+        auto trap_val =  0x80ULL << 24 | (cause << 16) | trap_id;
+        this->template get_reg<uint32_t>(arch::traits<ARCH>::TRAP_STATE) = trap_val;
+        this->template get_reg<uint32_t>(arch::traits<ARCH>::NEXT_PC) = std::numeric_limits<uint32_t>::max();
+    }
+
+    void leave_trap(unsigned lvl){
+        this->core.leave_trap(lvl);
+        auto pc_val = super::template read_mem<reg_t>(traits<ARCH>::CSR, (lvl << 8) + 0x41);
+        this->template get_reg<reg_t>(arch::traits<ARCH>::NEXT_PC) = pc_val;
+        this->template get_reg<uint32_t>(arch::traits<ARCH>::LAST_BRANCH) = std::numeric_limits<uint32_t>::max();
+    }
+
+    void wait(unsigned type){
+        this->core.wait_until(type);
+    }
+
+
 private:
     /****************************************************************************
      * start opcode definitions
@@ -191,32 +208,30 @@ vm_impl<ARCH>::vm_impl(ARCH &core, unsigned core_id, unsigned cluster_id)
 }
 
 template <typename ARCH>
-typename vm_base<ARCH>::virt_addr_t vm_impl<ARCH>::execute_single_inst(virt_addr_t pc) {
+typename vm_base<ARCH>::virt_addr_t vm_impl<ARCH>::execute_inst(virt_addr_t start, std::function<bool(void)> pred) {
     // we fetch at max 4 byte, alignment is 2
     enum {TRAP_ID=1<<16};
-    code_word_t insn = 0;
     const typename traits<ARCH>::addr_t upper_bits = ~traits<ARCH>::PGMASK;
-    phys_addr_t paddr(pc);
+    code_word_t insn = 0;
     auto *const data = (uint8_t *)&insn;
-    paddr = this->core.v2p(pc);
+    auto pc=start;
+    while(pred){
+        auto paddr = this->core.v2p(pc);
         if ((pc.val & upper_bits) != ((pc.val + 2) & upper_bits)) { // we may cross a page boundary
-        auto res = this->core.read(paddr, 2, data);
-        if (res != iss::Ok) throw trap_access(TRAP_ID, pc.val);
-        if ((insn & 0x3) == 0x3) { // this is a 32bit instruction
-            res = this->core.read(this->core.v2p(pc + 2), 2, data + 2);
-        }
+            if (this->core.read(paddr, 2, data) != iss::Ok) throw trap_access(TRAP_ID, pc.val);
+            if ((insn & 0x3) == 0x3) // this is a 32bit instruction
+                if (this->core.read(this->core.v2p(pc + 2), 2, data + 2) != iss::Ok) throw trap_access(TRAP_ID, pc.val);
         } else {
-        auto res = this->core.read(paddr, 4, data);
-        if (res != iss::Ok) throw trap_access(TRAP_ID, pc.val);
+            if (this->core.read(paddr, 4, data) != iss::Ok) throw trap_access(TRAP_ID, pc.val);
         }
         if (insn == 0x0000006f || (insn&0xffff)==0xa001) throw simulation_stopped(0); // 'J 0' or 'C.J 0'
-    // curr pc on stack
         auto lut_val = extract_fields(insn);
         auto f = qlut[insn & 0x3][lut_val];
-    if (f == nullptr) {
+        if (!f)
             f = &this_class::illegal_intruction;
+        pc = (this->*f)(pc, insn);
     }
-    return (this->*f)(pc, insn);
+    return pc;
 }
 
 } // namespace mnrv32

incl/iss/arch/riscv_hart_msu_vp.h

@@ -657,9 +657,9 @@ iss::status riscv_hart_msu_vp<BASE>::read(const address_type type, const access_
         const uint64_t addr, const unsigned length, uint8_t *const data) {
 #ifndef NDEBUG
     if (access && iss::access_type::DEBUG) {
-        LOG(TRACE) << "debug read of " << length << " bytes @addr " << addr;
+        LOG(TRACE) << "debug read of " << length << " bytes @addr 0x" << std::hex << addr;
     } else {
-        LOG(TRACE) << "read of " << length << " bytes  @addr " << addr;
+        LOG(TRACE) << "read of " << length << " bytes  @addr 0x" << std::hex << addr;
     }
 #endif
     try {
@@ -738,19 +738,19 @@ iss::status riscv_hart_msu_vp<BASE>::write(const address_type type, const access
     switch (length) {
     case 8:
         LOG(TRACE) << prefix << "write of " << length << " bytes (0x" << std::hex << *(uint64_t *)&data[0] << std::dec
-                   << ") @addr " << addr;
+                   << ") @addr 0x" << std::hex << addr;
         break;
     case 4:
         LOG(TRACE) << prefix << "write of " << length << " bytes (0x" << std::hex << *(uint32_t *)&data[0] << std::dec
-                   << ") @addr " << addr;
+                   << ") @addr 0x" << std::hex << addr;
         break;
     case 2:
         LOG(TRACE) << prefix << "write of " << length << " bytes (0x" << std::hex << *(uint16_t *)&data[0] << std::dec
-                   << ") @addr " << addr;
+                   << ") @addr 0x" << std::hex << addr;
         break;
     case 1:
         LOG(TRACE) << prefix << "write of " << length << " bytes (0x" << std::hex << (uint16_t)data[0] << std::dec
-                   << ") @addr " << addr;
+                   << ") @addr 0x" << std::hex << addr;
         break;
     default:
         LOG(TRACE) << prefix << "write of " << length << " bytes @addr " << addr;

src/main.cpp

@@ -105,7 +105,7 @@ int main(int argc, char *argv[]) {
         std::unique_ptr<iss::arch_if> cpu{nullptr};
         std::string isa_opt(clim["isa"].as<std::string>());
         iss::arch::mnrv32* lcpu = new iss::arch::riscv_hart_msu_vp<iss::arch::mnrv32>();
-        vm = iss::llvm::create(lcpu, clim["gdb-port"].as<unsigned>());
+        vm = iss::interp::create(lcpu, clim["gdb-port"].as<unsigned>()); //iss::llvm::create(lcpu, clim["gdb-port"].as<unsigned>());
         cpu.reset(lcpu);
         if (clim.count("plugin")) {
             for (std::string opt_val : clim["plugin"].as<std::vector<std::string>>()) {