3b_sim/sim.cpp

   1 #include <iostream>
   2 #include <iomanip>
   3 #include <fstream>
   4 #include <boost/tokenizer.hpp>
   5 #include <boost/program_options.hpp>
   6 #include <boost/lexical_cast.hpp>
   7 #include <string>
   8 #include <map>
   9 #include <list>
  10
  11 #include <boost/function.hpp>
  12 #include <boost/functional.hpp>
  13 #include <boost/tuple/tuple.hpp>
  14
  15 #include "disasm.h"
  16 #include "ccpu.hpp"
  17 #include "CInstrFactory.hpp"
  18 #include "uint32_from_hex.hpp"
  19
  20 #include "SReadline/SReadline.h"
  21 using namespace swift;
  22
  23 #define RAM_END (1000)
  24 #define PROG_END (1000)
  25 #define REG_COUNT (16)
  26
  27 typedef boost::function<void (const vector<string> &)> Func;
  28 typedef boost::tuple<string, Func, string> CompleterElement;
  29
  30 typedef list<CompleterElement> MyCompleterContainer;
  31
  32 class LookupFunctor
  33 {
  34         public:
  35                 // Creates a functor and memorises tokens
  36                 LookupFunctor(const vector<string>&  tokens) : Tokens(tokens) {}
  37
  38                 // Compares the first token only
  39                 bool operator()(const CompleterElement& ele) const
  40                 {
  41                         return (strncmp(Tokens.begin()->c_str(), ele.get<0>().c_str(), Tokens.begin()->size()) == 0);
  42                 }
  43
  44         private:
  45                 const vector<string> &Tokens;
  46 };
  47
  48
  49
  50
  51 class CHelpExec
  52 {
  53         private:
  54                 const MyCompleterContainer &m_completers;
  55
  56         public:
  57                 CHelpExec(const MyCompleterContainer &cont) : m_completers(cont) {}
  58
  59                 void operator() (const vector<string>&)
  60                 {
  61                         cout << "Available commands: " << endl;
  62                         for(auto iter = m_completers.begin(); iter != m_completers.end(); ++iter) {
  63                                 cout << setw(15) << (*iter).get<0>() << ": " << (*iter).get<2>() << endl;
  64                         }
  65                 }
  66 };
  67
  68 void close_prog(const std::vector<std::string> &);
  69
  70 CCpu* Iinstr::m_cpu;
  71
  72 CCpu* global_cpu = NULL;
  73
  74 vector<CDat> breakpoints;
  75
  76 bool ignoreBreak = false;
  77
  78 void doExit(const vector<string>&)
  79 {
  80         exit(EXIT_SUCCESS);
  81 }
  82
  83 unsigned int convertStringToNum(const std::string& in)
  84 {
  85         if(in.substr(0,2) == "0x") {
  86                 return lexical_cast<uint32_from_hex>(in);
  87         }
  88         else {
  89                 return lexical_cast<unsigned int>(in);
  90         }
  91 }
  92
  93
  94 void execStep(const vector<string>& in)
  95 {
  96         int count = 1;
  97         if(in.size() == 2) {
  98                 try {
  99                         count = convertStringToNum(in.back());
 100                 }
 101                 catch(bad_cast&) {
 102                         cerr << "given parameter to step is not a number" << endl;
 103                 }
 104         }
 105         while(count > 0) {
 106                 try {
 107                         auto breakp = find(breakpoints.begin(), breakpoints.end(), global_cpu->getNextPC());
 108                         if(breakp == breakpoints.end() || ignoreBreak) {
 109                                 global_cpu->tick();
 110                                 ignoreBreak = false;
 111                         }
 112                         else {
 113                                 ignoreBreak = true;
 114                                 cout << "Breakpoint 0x" << std::hex << setw(8) << setfill('0') << *breakp << std::hex << " hit" << endl;
 115                                 break;
 116                         }
 117                 }
 118                 catch(std::string& e) {
 119                         cerr << e << endl;
 120                 }
 121                 count--;
 122         }
 123 }
 124
 125 void execRun(const vector<string>&)
 126 {
 127         while(1) {
 128                 try {
 129                         auto breakp = find(breakpoints.begin(), breakpoints.end(), global_cpu->getNextPC());
 130                         if(breakp == breakpoints.end() || ignoreBreak) {
 131                                 global_cpu->tick();
 132                                 ignoreBreak = false;
 133                         }
 134                         else {
 135                                 ignoreBreak = true;
 136                                 cout << "Breakpoint 0x" << std::hex << setw(8) << setfill('0') << *breakp << std::hex << " hit" << endl;
 137                                 return;
 138                         }
 139                 }
 140                 catch(std::string& e) {
 141                         cerr << e << endl;
 142                         return;
 143                 }
 144         }
 145 }
 146
 147 void setPC(const vector<string>& in)
 148 {
 149         CDat addr = 0;
 150         if(in.size() == 2) {
 151                 try {
 152                         addr = convertStringToNum(in.back());
 153                 }
 154                 catch(bad_cast&) {
 155                         cerr << "given parameter is not a number" << endl;
 156                         return;
 157                 }
 158         }
 159         global_cpu->setNextPC(addr);
 160         cout << "Set programcounter to 0x" << std::hex << setw(8) << setfill('0') << addr << std::dec << endl;
 161 }
 162
 163
 164 void printReg(const vector<string>& in)
 165 {
 166         int i, start = 0, end = REG_COUNT-1;
 167         /* Todo:
 168          * 1) make 2 columns
 169          */
 170
 171         if(in.size() >= 2) {
 172                 try {
 173                         start = convertStringToNum(in[1]);
 174                         if(start < 0 || start > (REG_COUNT-1)) {
 175                                 cerr << "start is out of range" << endl;
 176                                 return;
 177                         }
 178                         end = start;
 179                 }
 180                 catch(bad_cast&) {
 181                         cerr << "given parameter is not a number" << endl;
 182                         return;
 183                 }
 184         }
 185
 186         if(in.size() >= 3) {
 187                 try {
 188                         end = convertStringToNum(in[2]);
 189                         if(start > end || end > (REG_COUNT-1)) {
 190                                 cerr << "end is out of range or smaller than start" << endl;
 191                                 return;
 192                         }
 193                 }
 194                 catch(bad_cast&) {
 195                         cerr << "given parameter is not a number" << endl;
 196                         return;
 197                 }
 198         }
 199
 200         for(i = start; i <= end; i++) {
 201                 cout << setw(2) << setfill('0') << i << ": 0x" << std::hex << setw(8) << setfill('0') << global_cpu->getRegister(i) << " " << std::dec << setw(10) << setfill(' ') << global_cpu->getRegister(i) << endl;
 202         }
 203 }
 204
 205 void printRAM(const vector<string>& in)
 206 {
 207         int i, start = 0, end = 15;
 208         /* Todo:
 209          * 1) make 2 columns
 210          */
 211
 212         if(in.size() >= 2) {
 213                 try {
 214                         start = convertStringToNum(in[1]);
 215                         if(start < 0 || start > (RAM_END-1)) {
 216                                 cerr << "start is out of range" << endl;
 217                                 return;
 218                         }
 219                         start = (start & (~(BYTE_COUNT-1))) / BYTE_COUNT;
 220                         end = start;
 221                 }
 222                 catch(bad_cast&) {
 223                         cerr << "given parameter is not a number" << endl;
 224                         return;
 225                 }
 226         }
 227
 228         if(in.size() >= 3) {
 229                 try {
 230                         end = convertStringToNum(in[2]);
 231                         if(start > end || end > (RAM_END-1)) {
 232                                 cerr << "end is out of range or smaller than start" << endl;
 233                                 return;
 234                         }
 235                         if(end % BYTE_COUNT != 0) {
 236                                 end = ((end & (~(BYTE_COUNT-1))) / BYTE_COUNT)+1;
 237                         }
 238                         else {
 239                                 end = ((end & (~(BYTE_COUNT-1))) / BYTE_COUNT);
 240                         }
 241                 }
 242                 catch(bad_cast&) {
 243                         cerr << "given parameter is not a number" << endl;
 244                         return;
 245                 }
 246         }
 247         for(i = start*BYTE_COUNT; i <= end*BYTE_COUNT; i += BYTE_COUNT) {
 248                 cout << std::hex << "0x" << setw(8) << setfill('0') << i << ": 0x" << std::hex << setw(8) << setfill('0') << global_cpu->getRAM(i) << " " << std::dec << setw(10) << setfill(' ') << global_cpu->getRAM(i) << endl;
 249         }
 250 }
 251
 252 void printPROG(const vector<string>& in)
 253 {
 254         int i, start = 0, end = 15;
 255         /* Todo:
 256          * 1) make 2 columns
 257          */
 258
 259         if(in.size() >= 2) {
 260                 try {
 261                         start = convertStringToNum(in[1]);
 262                         if(start < 0 || start > (PROG_END-1)) {
 263                                 cerr << "start is out of range" << endl;
 264                                 return;
 265                         }
 266                         start = (start & (~(BYTE_COUNT-1))) / BYTE_COUNT;
 267                         end = start;
 268                 }
 269                 catch(bad_cast&) {
 270                         cerr << "given parameter is not a number" << endl;
 271                         return;
 272                 }
 273         }
 274
 275         if(in.size() >= 3) {
 276                 try {
 277                         end = convertStringToNum(in[2]);
 278                         if(start > end || end > (PROG_END-1)) {
 279                                 cerr << "end is out of range or smaller than start" << endl;
 280                                 return;
 281                         }
 282                         if(end % BYTE_COUNT != 0) {
 283                                 end = ((end & (~(BYTE_COUNT-1))) / BYTE_COUNT)+1;
 284                         }
 285                         else {
 286                                 end = ((end & (~(BYTE_COUNT-1))) / BYTE_COUNT);
 287                         }
 288
 289                 }
 290                 catch(bad_cast&) {
 291                         cerr << "given parameter is not a number" << endl;
 292                         return;
 293                 }
 294         }
 295
 296         for(i = start*BYTE_COUNT; i <= end*BYTE_COUNT; i += BYTE_COUNT) {
 297                 Iinstr* pi = global_cpu->getProg(i);
 298                 if(pi == NULL) {
 299                         cout << std::hex << "0x" << setw(8) << setfill('0') << i << ": NOP" << endl;
 300                 }
 301                 else {
 302                         cout << std::hex << "0x" << setw(8) << setfill('0') << i << ": " << std::dec << pi->toString() << endl;
 303                 }
 304         }
 305 }
 306
 307 void setBreak(const vector<string>& in)
 308 {
 309         unsigned int addr = 0;
 310         if(in.size() == 2) {
 311                 try {
 312                         addr = convertStringToNum(in.back());
 313                         breakpoints.push_back(addr);
 314                         cout << "Breakpoint 0x" << std::hex << setw(8) << setfill('0') << addr << std::dec << " set" << endl;
 315                 }
 316                 catch(bad_cast&) {
 317                         cerr << "Given parameter is not a valid address" << endl;
 318                 }
 319         }
 320         else {
 321                 cerr << "Invalid parameter count!" << endl;
 322         }
 323 }
 324
 325 void listBreaks(const vector<string>&)
 326 {
 327         for(auto iter = breakpoints.begin(); iter != breakpoints.end(); ++iter) {
 328                 cout << "Breakpoint at 0x" << std::hex << setw(8) << setfill('0') << *iter << std::dec << endl;
 329         }
 330 }
 331
 332 void printStatus(const vector<string>&)
 333 {
 334         CDat stackp = global_cpu->getStack();
 335         CDat stackd = global_cpu->getRAM(stackp);
 336         cout << "Stack pointer: " << stackp << " @stackpointer: " << stackd << endl;
 337         cout << "PSW: 0x" << std::hex << setw(8) << setfill('0') << global_cpu->getFlags() << std::dec << endl;
 338         cout << "cur PC: 0x" << std::hex << setw(8) << setfill('0') << global_cpu->getCurPC() << " next PC: 0x" << setw(8) << setfill('0') << global_cpu->getNextPC() << std::dec << endl;
 339
 340 }
 341
 342 using boost::lexical_cast;
 343 using boost::bad_lexical_cast;
 344
 345 using namespace std;
 346
 347 using namespace boost::program_options;
 348 namespace po = boost::program_options;
 349
 350 std::string progName;
 351
 352 int main(int argc, char* argv[])
 353 {
 354         progName = argv[0];
 355         ifstream inFile;
 356         try {
 357                 po::options_description desc("Allowed options");
 358                 desc.add_options()
 359                 ("help,h","produce help message")
 360                 ("file,f",value<string>(), "input file")
 361                 ;
 362
 363                 po::positional_options_description p;
 364                 p.add("file",1);
 365
 366                 po::variables_map vm;
 367                 po::store(po::command_line_parser(argc, argv).options(desc).positional(p).run(), vm);
 368                 po::notify(vm);
 369
 370                 if(vm.count("help")) {
 371                         cout << desc << endl;
 372                         return EXIT_FAILURE;
 373                 }
 374
 375                 if(vm.count("file")) {
 376 #ifdef DEBUG
 377                         cout << "going to open file " << vm["file"].as<string>() << endl;
 378 #endif
 379                         inFile.open(vm["file"].as<string>(), ios::in);
 380                         if(!inFile) {
 381                                 cerr << "Error opening file " << vm["file"].as<string>() << endl;
 382                                 return EXIT_FAILURE;
 383                         }
 384                 }
 385                 else {
 386                         cout << "not input file given!" << endl << endl;
 387                         cout << desc << endl;
 388                         return EXIT_FAILURE;
 389                 }
 390         }
 391         catch(std::exception& ex) {
 392                 cout << ex.what() << endl;
 393         }
 394
 395
 396         string dir = "./instr/";
 397
 398         map<short, Iinstr*> instr;
 399
 400         CInstrFactory instrFab;
 401         try {
 402                 instrFab.loadLibsIntoMap(instr, dir);
 403         }
 404         catch(std::bad_alloc& e) {
 405                 cerr << progName << ": bad_alloc caught " << e.what() << endl;
 406                 exit(EXIT_FAILURE);
 407         }
 408         catch(std::string& s) {
 409                 cerr << progName << ": " << s << endl;
 410                 exit(EXIT_FAILURE);
 411         }
 412
 413         CCpu cpu(REG_COUNT, RAM_END, PROG_END);
 414
 415         global_cpu = &cpu;
 416
 417         Iinstr::setCPU(&cpu);
 418
 419
 420         std::string str = "";
 421         int addr = 0;
 422         boost::char_separator<char> sep(";", "", boost::keep_empty_tokens);
 423         boost::tokenizer<boost::char_separator<char> > tokens(str, sep);
 424         disasm disasm(instr);
 425         while(getline(inFile, str)) {
 426                 int count = 0;
 427                 tokens.assign(str);
 428                 stringstream out;
 429                 int type = 0;
 430                 for(auto tok_iter = tokens.begin(); tok_iter != tokens.end(); ++tok_iter) {
 431                         if(tok_iter == tokens.begin()) {
 432                                 try {
 433                                         type = lexical_cast<int>(*tok_iter);
 434                                         count++;
 435                                         continue;
 436                                 }
 437                                 catch(bad_lexical_cast &) {
 438                                         break;
 439                                 }
 440                                 cout << endl;
 441                         }
 442                         switch(type) {
 443                                 case 0:
 444                                         if(count == 1) {
 445                                                 try {
 446                                                         addr = lexical_cast<uint32_from_hex>(*tok_iter);
 447                                                 }
 448                                                 catch(bad_lexical_cast& e) {
 449                                                         cerr << e.what() << endl;
 450                                                         exit(EXIT_FAILURE);
 451                                                 }
 452                                         }
 453                                         else if(count == 2) {
 454                                                 try {
 455                                                         CDat data = lexical_cast<uint32_from_hex>(*tok_iter);
 456                                                         cpu.setRAM(addr, data);
 457                                                 }
 458                                                 catch(bad_lexical_cast& e) {
 459                                                         cerr << e.what() << endl;
 460                                                         exit(EXIT_FAILURE);
 461                                                 }
 462                                         }
 463                                         break;
 464                                 case 1:
 465                                         if(count == 1) {
 466                                                 try {
 467                                                         addr = lexical_cast<uint32_from_hex>(*tok_iter);
 468                                                 }
 469                                                 catch(bad_lexical_cast& e) {
 470                                                         cerr << e.what() << endl;
 471                                                         exit(EXIT_FAILURE);
 472                                                 }
 473                                         }
 474                                         else if(count == 2) {
 475                                                 Iinstr *pi = disasm.decode(*tok_iter);
 476                                                 cpu.setProg(addr, pi);
 477                                         }
 478                                         break;
 479                                 case 2:
 480                                 case 3:
 481                                         cerr << "ignoring labels and comments for now" << endl;
 482                                         break;
 483                                 default:
 484                                         cerr << "i was to lazy to implement the other format types for now" << endl;
 485                         }
 486                         count++;
 487                 }
 488         }
 489         inFile.close();
 490
 491         cout << endl;
 492
 493 /*
 494         for(int i = 0; i <= 32; i += 4) {
 495                 Iinstr *pinstr = cpu.getProg(i);
 496                 if(pinstr != NULL) {
 497                         cout << i << " : " << std::hex << i << std::dec << " " << pinstr->toString() << endl;
 498                 }
 499                 else {
 500                         cout << "Null at " << i << " : " << std::hex << i << endl;
 501                 }
 502         }
 503
 504         for(int i = 0; i <= 32; i += 4) {
 505                 CDat data = cpu.getRAM(i);
 506                 cout << i << " : " << std::hex << i << std::dec << " " << data << endl;
 507         }
 508 */
 509         cpu.setRegister(1, 4);
 510         cpu.setRegister(2, 0);
 511         cpu.setRAM(0,5);
 512         cpu.setRAM(4,50);
 513         cpu.setRAM(8,32);
 514         cpu.setRAM(12,45);
 515
 516         // following: job of the bootloader
 517         //set stackpointer
 518         cpu.setStack(500);
 519         //set return to nowhere for ret
 520         cpu.setRAM(500,50);
 521
 522         SReadline Reader;
 523
 524         MyCompleterContainer Completers;
 525
 526         CHelpExec HelpExec(Completers);
 527
 528         Completers.push_back(CompleterElement("help", boost::bind1st( boost::mem_fun( &CHelpExec::operator()), &HelpExec), "Prints this message"));
 529         Completers.push_back(CompleterElement("quit", &doExit, "Exits program"));
 530         Completers.push_back(CompleterElement("exit", &doExit, "Exits program"));
 531         Completers.push_back(CompleterElement("step [count]",&execStep, "Runs [count] ticks. if count is not given one tick is executed."));
 532         Completers.push_back(CompleterElement("dreg [s] [e]",&printReg, "Prints registers. if s is given, only register s is printed. if s and e are given the registers from s to e are printed. if omitted all registers a printed."));
 533         Completers.push_back(CompleterElement("ddata [s] [e]",&printRAM, "Prints RAM. if s is given, only RAM-Addr. s is printed. if s and e are given the RAM-Addrs from s to e are printed. if omitted the first 16 RAM-Addrs are printed."));
 534         Completers.push_back(CompleterElement("dprog [s] [e]",&printPROG, "Prints program. if s is given, only Prog-Addr. s is printed. if s and e are given the Prog-Addrs from s to e are printed. if omitted the first 16 Prog-Addrs are printed."));
 535         Completers.push_back(CompleterElement("break addr",&setBreak, "Sets a breakpoint for address addr."));
 536         Completers.push_back(CompleterElement("listbreaks",&listBreaks, "Lists all breakpoints."));
 537         Completers.push_back(CompleterElement("run",&execRun, "Runs till next breakpoint or end of program."));
 538         Completers.push_back(CompleterElement("setpc [num]",&setPC, "Sets PC to num. if num is omitted 0 is used."));
 539         Completers.push_back(CompleterElement("status",&printStatus, "Prints status of CPU."));
 540
 541         Reader.RegisterCompletions(Completers);
 542
 543         string UserInput;
 544         vector<string> Tokens, lastTokens;
 545         bool EndOfInput = false;
 546
 547         auto Found(Completers.end());
 548
 549         Func lastFunc = NULL;
 550
 551
 552         while(1) {
 553                 UserInput = Reader.GetLine("> ", Tokens, EndOfInput);
 554                 if(EndOfInput) {
 555                         break;
 556                 }
 557
 558                 if(!Tokens.empty()) {
 559                         Found = find_if(Completers.begin(), Completers.end(), LookupFunctor(Tokens));
 560
 561                         if(Found != Completers.end()) {
 562                                 if((*Found).get<1>() != 0) {
 563                                         lastFunc = (*Found).get<1>();
 564                                         lastFunc(Tokens);
 565                                         lastTokens = Tokens;
 566                                         //(*Found).get<1>()(Tokens);
 567                                 }
 568                         }
 569                         else {
 570                                 lastFunc = NULL;
 571                                 cout << "Unknown command. 'help' displays help" << endl;
 572                         }
 573                 }
 574                 else {
 575                         if(lastFunc != NULL) {
 576                                 lastFunc(lastTokens);
 577                         }
 578                         else {
 579                                 cout << "Unknown command. 'help' displays help" << endl;
 580                         }
 581                 }
 582         }
 583
 584
 585 /*
 586         for(int i = 0; ; i++) {
 587                 try {
 588                         cpu.tick();
 589                         cout << " reg0: " << cpu.getRegister(0) <<  " reg1: " << cpu.getRegister(1);
 590                         cout << " reg2: " << cpu.getRegister(2) <<  " reg3: " << cpu.getRegister(3);
 591                         cout << " reg4: " << cpu.getRegister(4) <<  " reg5: " << cpu.getRegister(5);
 592                         cout << endl << endl;
 593
 594                 }
 595                 catch(string& e) {
 596                         cerr << e << endl;
 597                         break;
 598                 }
 599         }
 600 */
 601         return EXIT_SUCCESS;
 602 }