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https://github.com/lowRISC/ibex.git
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09d2dd2306
This allows us to model stuff more closely. This depends on Spike version ibex-cosim-v0.2 (which is rebased onto a master branch commit supporting these more specific ISA strings).
111 lines
2.8 KiB
C++
111 lines
2.8 KiB
C++
// Copyright lowRISC contributors.
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// Licensed under the Apache License, Version 2.0, see LICENSE for details.
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// SPDX-License-Identifier: Apache-2.0
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#include <cassert>
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#include <fstream>
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#include <iostream>
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#include "Vibex_simple_system__Syms.h"
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#include "ibex_pcounts.h"
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#include "ibex_simple_system.h"
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#include "verilated_toplevel.h"
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#include "verilator_memutil.h"
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#include "verilator_sim_ctrl.h"
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SimpleSystem::SimpleSystem(const char *ram_hier_path, int ram_size_words)
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: _ram(ram_hier_path, ram_size_words, 4) {}
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int SimpleSystem::Main(int argc, char **argv) {
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bool exit_app;
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int ret_code = Setup(argc, argv, exit_app);
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if (exit_app) {
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return ret_code;
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}
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Run();
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if (!Finish()) {
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return 1;
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}
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return 0;
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}
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std::string SimpleSystem::GetIsaString() const {
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const Vibex_simple_system &top = _top;
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assert(top.ibex_simple_system);
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std::string base = top.ibex_simple_system->RV32E ? "rv32e" : "rv32i";
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std::string extensions;
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if (top.ibex_simple_system->RV32M)
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extensions += "m";
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extensions += "c";
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switch (top.ibex_simple_system->RV32B) {
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case 0: // RV32BNone
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break;
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case 1: // RV32BBalanced
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extensions += "_Zba_Zbb_Zbs_XZbf_XZbt";
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break;
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case 2: // RV32BOTEarlGrey
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extensions += "_Zba_Zbb_Zbc_Zbs_XZbf_XZbp_XZbr_XZbt";
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break;
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case 3: // RV32BFull
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extensions += "_Zba_Zbb_Zbc_Zbs_XZbe_XZbf_XZbp_XZbr_XZbt";
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break;
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}
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return base + extensions;
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}
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int SimpleSystem::Setup(int argc, char **argv, bool &exit_app) {
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VerilatorSimCtrl &simctrl = VerilatorSimCtrl::GetInstance();
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simctrl.SetTop(&_top, &_top.IO_CLK, &_top.IO_RST_N,
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VerilatorSimCtrlFlags::ResetPolarityNegative);
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_memutil.RegisterMemoryArea("ram", 0x0, &_ram);
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simctrl.RegisterExtension(&_memutil);
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exit_app = false;
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return simctrl.ParseCommandArgs(argc, argv, exit_app);
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}
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void SimpleSystem::Run() {
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VerilatorSimCtrl &simctrl = VerilatorSimCtrl::GetInstance();
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std::cout << "Simulation of Ibex" << std::endl
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<< "==================" << std::endl
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<< std::endl;
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simctrl.RunSimulation();
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}
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bool SimpleSystem::Finish() {
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VerilatorSimCtrl &simctrl = VerilatorSimCtrl::GetInstance();
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if (!simctrl.WasSimulationSuccessful()) {
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return false;
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}
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// Set the scope to the root scope, the ibex_pcount_string function otherwise
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// doesn't know the scope itself. Could be moved to ibex_pcount_string, but
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// would require a way to set the scope name from here, similar to MemUtil.
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svSetScope(svGetScopeFromName("TOP.ibex_simple_system"));
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std::cout << "\nPerformance Counters" << std::endl
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<< "====================" << std::endl;
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std::cout << ibex_pcount_string(false);
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std::ofstream pcount_csv("ibex_simple_system_pcount.csv");
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pcount_csv << ibex_pcount_string(true);
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return true;
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}
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