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dingusppc/main.cpp
dingusdev b5074e4ce1 Started work on NVRAM 
Tried to also fix some issued with MSVC
2020-01-05 09:52:46 -07:00

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//DingusPPC - Prototype 5bf2
//Written by divingkatae and maximum
//(c)2018-20 (theweirdo) spatium
//Please ask for permission
//if you want to distribute this.
//(divingkatae#1017 on Discord)
//The main runfile - main.cpp
//This is where the magic begins
#include <iostream>
#include <map>
#include <cassert>
#include <cstring>
#include <cinttypes>
#include <array>
#include <stdio.h>
#include <fstream>
#include <stdexcept>
#include "ppcemu.h"
#include "ppcmmu.h"
#include "devices/mpc106.h"
#include "debugger/debugger.h"
#include "devices/machineid.h"
#include "devices/macio.h"
#include "devices/mpc106.h"
#define max_16b_int 65535
#define max_32b_int 4294967295
#define ENDIAN_REVERSE16(x) (x >> 8) | (((x) & 0x00FF) << 8)
#define ENDIAN_REVERSE32(x) (x >> 24) | ((x & 0x00FF0000) >> 8) | ((x & 0x0000FF00) << 8) | (x << 24)
#define ENDIAN_REVERSE64(x) (x >> 56) | ((x & 0x00FF000000000000) >> 48) | ((x & 0x0000FF0000000000) >> 40) | ((x & 0x000000FF00000000) >> 32) | \
((x & 0x00000000FF000000) << 32) | ((x & 0x0000000000FF0000) << 40) | ((x & 0x000000000000FF00) << 48) | ((x & 0x00000000000000FF) << 56)
using namespace std;
/**
Power Macintosh ROM identification string
is located in the ConfigInfo structure starting at 0x30D064 (PCI Macs)
or 0x30C064 (Nubus Macs). This helps a lot to determine which
hardware is to be used.
*/
static const map<string,string> PPCMac_ROMIdentity = { //Codename Abbreviation for...
{"Alch", "Performa 6400"}, //Alchemy
{"Come", "PowerBook 2400"}, //Comet
{"Cord", "Power Mac 5200/6200 series"}, //Cordyceps
{"Gaze", "Power Mac 6500"}, //Gazelle
{"Goss", "Power Mac G3 Beige"}, //Gossamer
{"GRX ", "PowerBook G3 Wallstreet"}, //(Unknown)
{"Hoop", "PowerBook 3400"}, //Hooper
{"PBX ", "PowerBook Pre-G3"}, //(Unknown)
{"PDM ", "Nubus Power Mac or WGS"}, //Piltdown Man (6100/7100/8100)
{"Pip ", "Pippin... uh... yeah..."}, //Pippin
{"Powe", "Generic Power Mac"}, //PowerMac?
{"Spar", "20th Anniversay Mac, you lucky thing."}, //Spartacus
{"Tanz", "Power Mac 4400"}, //Tanzania
{"TNT ", "Power Mac 7xxxx/8xxx series"}, //Trinitrotoluene :-)
{"Zanz", "A complete engima."}, //Zanzibar (mentioned in Sheepshaver's code, but no match to any known ROM)
{"????", "A clone, perhaps?"} //N/A (Placeholder ID)
};
SetPRS ppc_state;
bool is_nubus = 0;
bool grab_branch;
bool grab_exception;
bool grab_return;
bool grab_breakpoint;
uint32_t ppc_cur_instruction; //Current instruction for the PPC
uint32_t ppc_effective_address;
uint32_t ppc_real_address;
uint32_t ppc_next_instruction_address; //Used for branching, setting up the NIA
uint32_t return_value;
MemCtrlBase *mem_ctrl_instance = 0;
HeathrowIC *heathrow = 0;
GossamerID *machine_id;
unsigned char * machine_sysram_mem;
unsigned char * machine_sysrom_mem;
uint32_t grab_sysram_size;
uint32_t grab_iocont_size;
uint32_t grab_sysrom_size;
uint32_t ram_size_set;
uint32_t prev_msr_state = 0;
uint32_t cur_msr_state = 0;
//MSR Flags
bool msr_es_change; //Check Endian
uint32_t rom_file_begin; //where to start storing ROM files in memory
uint32_t pci_io_end;
uint32_t rom_filesize;
uint32_t write_opcode;
uint8_t write_char;
/*
//DISK VARIABLES
unsigned char * grab_disk_buf;
bool disk_inserted;
uint64_t disk_offset = 0;
uint32_t disk_word = 0;
*/
uint16_t rev_endian16(uint16_t insert_int){
return ENDIAN_REVERSE16(insert_int);
}
uint32_t rev_endian32(uint32_t insert_int){
return ENDIAN_REVERSE32(insert_int);
}
uint64_t rev_endian64(uint64_t insert_int){
return ENDIAN_REVERSE64(insert_int);
}
void ppc_exception_handler(uint32_t exception_type, uint32_t handle_args){
ppc_next_instruction_address = 0x0; //used to construct a new address
grab_exception = true;
bb_end = 0;
bb_kind = BB_end_reason::BB_EXCEPTION;
printf("MSR VALUE: %x \n Exception Type: %x", ppc_state.ppc_msr, exception_type);
//Check ROM Exception Prefix
if (ppc_state.ppc_msr & 0x40){
ppc_next_instruction_address |= 0xFFF00000;
}
else{
ppc_next_instruction_address &= 0x0000FFFF;
}
switch(exception_type){
case 0x0100: //System Reset
ppc_state.ppc_spr[26] = ((ppc_cur_instruction + 4) & 0xFFFFFFFC);
ppc_state.ppc_spr[27] = ppc_state.ppc_msr;
ppc_state.ppc_msr = (ppc_state.ppc_msr & 0xFFFD0041);
ppc_next_instruction_address += 0x0100;
break;
/**
case 0x0200: //Machine Check
break;
case 0x0300: //DSI
break;
case 0x0400: //ISI
break;
**/
case 0x0500: //External Interrupt
ppc_state.ppc_spr[26] = ((ppc_cur_instruction + 4) & 0xFFFFFFFC);
ppc_state.ppc_spr[27] = (ppc_state.ppc_msr & 0xFFFF);
ppc_state.ppc_msr = (ppc_state.ppc_msr & 0xFFFD0041);
ppc_next_instruction_address += 0x0500;
break;
case 0x0600: //Alignment Exception
ppc_state.ppc_spr[26] = ((ppc_cur_instruction + 4) & 0xFFFFFFFC);
ppc_state.ppc_spr[27] = (ppc_state.ppc_msr & 0xFFFF);
ppc_state.ppc_msr = (ppc_state.ppc_msr & 0xFFFD0041);
ppc_state.ppc_spr[19] = ppc_cur_instruction;
ppc_next_instruction_address += 0x0600;
case 0x0700: //Program;
ppc_state.ppc_spr[26] = ((ppc_cur_instruction + 4) & 0xFFFFFFFC);
handle_args += 0x10000;
ppc_state.ppc_spr[27] = handle_args + (ppc_state.ppc_msr & 0xFFFF);
ppc_state.ppc_msr = (ppc_state.ppc_msr & 0xFFFD0041);
ppc_next_instruction_address += 0x0700;
break;
case 0x0C00: //Sys Call
ppc_state.ppc_spr[26] = ((ppc_cur_instruction + 4) & 0xFFFFFFFC);
ppc_state.ppc_spr[27] = (ppc_state.ppc_msr & 0xFFFF);
ppc_state.ppc_msr = (ppc_state.ppc_msr & 0xFFFD0041);
ppc_next_instruction_address += 0x0C00;
break;
/**
case 0x0d: //Trace
break
**/
default:
ppc_state.ppc_spr[26] = ((ppc_cur_instruction + 4) & 0xFFFFFFFC);
ppc_state.ppc_spr[27] = (ppc_state.ppc_msr & 0xFFFF);
ppc_state.ppc_msr = (ppc_state.ppc_msr & 0xFFFD0041);
ppc_next_instruction_address += exception_type;
}
}
//Initialize the PPC's registers.
void reg_init(){
for (uint32_t i = 0; i < 32; i++){
ppc_state.ppc_fpr[i] = 0;
}
ppc_state.ppc_pc = 0;
for (uint32_t i = 0; i < 32; i++){
ppc_state.ppc_gpr[i] = 0;
}
ppc_state.ppc_cr = 0;
ppc_state.ppc_fpscr = 0;
ppc_state.ppc_tbr[0] = 0;
ppc_state.ppc_tbr[1] = 0;
for (uint32_t i = 0; i < 1024; i++){
switch(i){
case 287:
//Identify as a G3
//Processor IDS
// 601 v1 - 00010001
// 603 v1 - 00030001
// 604 v1 - 00040001
// 603e v1 - 00060101
// 750 v1 - 00080200
ppc_state.ppc_spr[i] = 0x00080200;
break;
/**
case 528:
case 536:
ppc_state.ppc_spr[i] = 0x00001FFE;
break;
case 530:
case 538:
ppc_state.ppc_spr[i] = 0xC0001FFE;
break;
case 532:
case 540:
ppc_state.ppc_spr[i] = 0xE0001FFE;
break;
case 534:
case 542:
ppc_state.ppc_spr[i] = 0xF0001FFE;
break;
case 529:
case 531:
case 537:
case 539:
ppc_state.ppc_spr[i] = 0x00000002;
break;
case 533:
case 541:
ppc_state.ppc_spr[i] = 0xE0000002;
break;
case 535:
ppc_state.ppc_spr[i] = 0xF0000002;
break;
case 543:
ppc_state.ppc_spr[i] = 0x00000002;
break;
**/
default:
ppc_state.ppc_spr[i] = 0;
}
}
//Only bit 25 of the MSR is initially set on bootup.
ppc_state.ppc_msr = 0x40;
for (uint32_t i = 0; i < 16; i++){
ppc_state.ppc_sr[i] = 0;
}
}
//Debugging Functions
uint32_t reg_print(){
for (uint32_t i = 0; i < 32; i++){
printf("FPR %d : %" PRIx64 "", i, ppc_state.ppc_fpr[i]);
}
ppc_state.ppc_pc = 0;
for (uint32_t i = 0; i < 32; i++){
printf("GPR %d : %x", i, ppc_state.ppc_gpr[i]);
}
printf("CR : %x", ppc_state.ppc_cr);
printf("FPSCR : %x", ppc_state.ppc_fpscr);
printf("TBR 0 : %x", ppc_state.ppc_tbr[0]);
printf("TBR 1 : %x", ppc_state.ppc_tbr[1]);
for (uint32_t i = 0; i < 1024; i++){
printf("SPR %d : %x", i, ppc_state.ppc_spr[i]);
}
printf("CR : %x", ppc_state.ppc_cr);
printf("MSR : %x", ppc_state.ppc_msr);
for (uint32_t i = 0; i < 16; i++){
printf("SR %d : %x", i, ppc_state.ppc_sr[i]);
}
return 0;
}
uint32_t reg_read(){
uint32_t grab_me = 0;
std::cout << hex << "TODO: Decide which register to read from; for now, which GPR?" << endl;
//printf("Which register to read from? 0 - GPR, 1 = FPR, 2 = CR, 3 = FPSCR");
std::cin >> hex >> grab_me;
if (grab_me < 32){
printf("GPR value: %d", ppc_state.ppc_gpr[grab_me]);
}
return 0;
}
uint32_t reg_write(){
uint32_t grab_me = 0;
std::cout << hex << "TODO: Decide which register to write to; for now, which GPR?" << endl;
//printf("Which register to write to? 0 - GPR, 1 = FPR, 2 = CR, 3 = FPSCR");
std::cin >> hex >> grab_me;
if (grab_me < 32){
printf("GPR value: %d", ppc_state.ppc_gpr[grab_me]);
}
return 0;
}
int main(int argc, char **argv)
{
ram_size_set = 0x4000000; //64 MB of RAM for the Mac
rom_file_begin = 0xFFF00000; //where to start storing ROM files in memory
pci_io_end = 0x83FFFFFF;
rom_filesize = 0x400000;
//Init virtual CPU.
reg_init();
//0xFFF00100 is where the reset vector is.
//In other words, begin executing code here.
ppc_state.ppc_pc = 0xFFF00100;
uint32_t opcode_entered = 0; //used for testing opcodes in playground
std::cout << "DingusPPC - Prototype 5bf4 (7/14/2019) " << endl;
std::cout << "Written by divingkatae, (c) 2019. " << endl;
std::cout << "This is not intended for general use. " << endl;
std::cout << "Use at your own discretion. " << endl;
//Open the ROM File.
ifstream romFile;
romFile.open("rom.bin", ios::in|ios::binary);
if (romFile.fail()){
cerr << "rom.bin not present. Please provide an appropriate ROM file"
<< " and restart this program.\n";
romFile.close();
return 1;
}
//Calculate and validate ROM file size.
romFile.seekg(0, romFile.end);
rom_filesize = (uint32_t) romFile.tellg();
printf("Rom SIZE: %d \n", rom_filesize);
romFile.seekg (0, romFile.beg);
if (rom_filesize != 0x400000){
cerr << "Unsupported ROM File size. Expected size is 4 megabytes.\n";
romFile.close();
return 1;
}
machine_sysram_mem = (unsigned char*) calloc (67108864, 1);
machine_sysrom_mem = (unsigned char*) calloc (rom_filesize, 1);
memset(machine_sysram_mem, 0x0, 67108864);
grab_sysram_size = sizeof(machine_sysram_mem);
grab_sysrom_size = rom_filesize;
//Sanity checks - Prevent the input files being too small or too big.
//Also prevent the ROM area from overflow.
if (ram_size_set < 0x800000){
cerr << "The RAM size must be at least 8 MB to function.\n";
return 1;
}
else if (ram_size_set > 0x20000000){
cerr << "RAM too big. Must be no more than 2 GB.\n";
return 1;
}
rom_file_begin = 0xFFFFFFFF - grab_sysrom_size + 1;
char configGrab = 0;
uint32_t configInfoOffset = 0;
romFile.seekg (0x300082, ios::beg); //This is where the place to get the offset is
romFile.get(configGrab); //just one byte to determine ConfigInfo location
configInfoOffset = (uint32_t)(configGrab & 0xff);
if (configInfoOffset == 0xC0){
is_nubus = 1;
}
uint32_t configInfoAddr = 0x300000 + (configInfoOffset << 8) + 0x69; //address to check the identifier string
char memPPCBlock[5]; //First four chars are enough to distinguish between codenames
romFile.seekg (configInfoAddr, ios::beg);
romFile.read(memPPCBlock, 4);
memPPCBlock[4] = 0;
uint32_t rom_id = (memPPCBlock[0] << 24) | (memPPCBlock[1] << 16) | (memPPCBlock[2] << 8) | memPPCBlock[3];
std::string string_test = std::string(memPPCBlock);
//Just auto-iterate through the list
for (auto iter = PPCMac_ROMIdentity.begin(); iter != PPCMac_ROMIdentity.end(); ){
string redo_me = iter->first;
if (string_test.compare(redo_me) == 0){
cout << "The machine is identified as..." << iter->second << endl;
romFile.seekg (0x0, ios::beg);
break;
}
else{
iter++;
}
}
switch(rom_id) {
case 0x476F7373: {
cout << "Initialize Gossamer hardware..." << endl;
MPC106 *mpc106 = new MPC106();
mem_ctrl_instance = mpc106;
if (!mem_ctrl_instance->add_rom_region(0xFFC00000, 0x400000)) {
cout << "failure!\n" << endl;
delete(mem_ctrl_instance);
romFile.close();
return 1;
}
machine_id = new GossamerID(0x3d8c);
assert(machine_id != 0);
mpc106->add_mmio_region(0xFF000004, 4096, machine_id);
heathrow = new HeathrowIC();
assert(heathrow != 0);
mpc106->pci_register_device(16, heathrow);
cout << "done" << endl;
}
break;
default:
cout << "This machine not supported yet." << endl;
return 1;
}
//Read ROM file content and transfer it to the dedicated ROM region
romFile.read ((char *)machine_sysrom_mem,grab_sysrom_size);
mem_ctrl_instance->set_data(0xFFC00000, machine_sysrom_mem, rom_filesize);
romFile.close();
if (argc > 1){
string checker = argv[1];
cout << checker << endl;
if (checker == "fuzzer"){
//Brute force every instruction that the PPC can interpret.
//TODO: Change this so that this goes through user-specified instructions.
ppc_cur_instruction = 0xFFFFFFFF;
std::cout << "Testing Opcode: " << ppc_cur_instruction << endl;
while (ppc_cur_instruction > 0x00000000){
ppc_main_opcode();
ppc_cur_instruction--;
}
}
else if ((checker=="1")|(checker=="realtime")|(checker=="/realtime")|(checker=="-realtime")){
ppc_exec();
}
else if ((checker=="e")|(checker=="loadelf")|(checker=="/loadelf")|(checker=="-loadelf")){
ifstream elfFile;
uint32_t elf_file_setsize = 0;
char elf_headerchk [4];
char elf_bformat [1];
char elf_machine [2];
char elf_memoffset [4];
elfFile.seekg(0, elfFile.end);
elf_file_setsize = (uint32_t) elfFile.tellg();
elfFile.seekg (0, elfFile.beg);
if (elf_file_setsize < 45){
cerr << "Elf File TOO SMALL. Please make sure it's a legitimate file.";
return 1;
}
else if (elf_file_setsize > ram_size_set){
cerr << "Elf File TOO BIG. Please make sure it fits within memory.";
return 1;
}
//There's got to be a better way to get fields of info from an ELF file.
elfFile.seekg(0x0, ios::beg); //ELF file begins here
elfFile.read(elf_headerchk, 4);
elfFile.seekg(0x4, ios::cur);
elfFile.read(elf_bformat, 1);
elfFile.seekg(0x8, ios::cur);
elfFile.read(elf_machine, 2);
elfFile.seekg(0x6, ios::cur);
elfFile.read(elf_memoffset, 4);
elfFile.seekg (0, elfFile.beg);
bool elf_valid_check = (atoi(elf_headerchk) == 0x7F454C46) && (atoi(elf_bformat) == 1) &&\
((atoi(elf_machine) == 0) | (atoi(elf_machine) == 20));
if (!elf_valid_check){
cerr << "The ELF file inserted was not legitimate. Please try again." << endl;
return 1;
}
elfFile.read ((char *)machine_sysram_mem,ram_size_set);
if (argc > 2){
string elfname = string(argv[1]);
elfname = elfname + ".elf";
elfFile.open(elfname, ios::in|ios::binary);
}
else{
elfFile.open("test.elf", ios::in|ios::binary);
}
if (elfFile.fail()){
cerr << "Please insert the elf file before continuing.\n";
return 1;
}
ppc_state.ppc_pc = atoi(elf_memoffset);
ppc_exec();
}
else if ((checker=="until")|(checker=="/until")|(checker=="-until")){
uint32_t grab_bp = 0x0;
std::cout << hex << "Enter the address in hex for where to stop execution." << endl;
cin >> hex >> grab_bp;
ppc_exec_until(grab_bp);
}
else if (checker=="disas"){
if (argc > 2){
checker = argv[1];
}
else{
checker = "\\compile.txt";
}
ifstream inFile (checker, ios::binary | ios::ate);
if (!inFile) {
cerr << "Unable to open file for assembling.";
exit(1);
}
}
else if ((checker=="stepi")|(checker=="/stepi")|(checker=="-stepi")){
std::cout << hex << "Ready to execute an opcode?" << endl;
string check_q;
cin >> check_q;
getline (cin, check_q);
if (check_q != "No"){
quickinstruction_translate(ppc_state.ppc_pc);
ppc_main_opcode();
if (grab_branch & !grab_exception){
ppc_state.ppc_pc = ppc_next_instruction_address;
grab_branch = 0;
ppc_tbr_update();
}
else if (grab_return | grab_exception){
ppc_state.ppc_pc = ppc_next_instruction_address;
grab_exception = 0;
grab_return = 0;
ppc_tbr_update();
}
else{
ppc_state.ppc_pc += 4;
ppc_tbr_update();
}
}
}
else if ((checker=="stepp")|(checker=="/stepp")|(checker=="-stepp")){
std::cout << hex << "Ready to execute a page of opcodes?" << endl;
string check_q;
cin >> check_q;
getline (cin, check_q);
if (check_q != "No"){
for (int instructions_to_do = 0; instructions_to_do < 256; instructions_to_do++){
quickinstruction_translate(ppc_state.ppc_pc);
ppc_main_opcode();
if (grab_branch & !grab_exception){
ppc_state.ppc_pc = ppc_next_instruction_address;
grab_branch = 0;
ppc_tbr_update();
}
else if (grab_return | grab_exception){
ppc_state.ppc_pc = ppc_next_instruction_address;
grab_exception = 0;
grab_return = 0;
ppc_tbr_update();
}
else{
ppc_state.ppc_pc += 4;
ppc_tbr_update();
}
}
}
}
else if ((checker=="play")|(checker=="playground")|(checker=="/playground")|(checker=="-playground")){
std::cout << hex << "Enter any opcodes for the PPC you want here." << endl;
while (power_on){
cin >> hex >> opcode_entered;
//power off the PPC
if (opcode_entered == 0x00000000){
power_on = 0;
}
//print registers
else if (opcode_entered == 0x00000001){
reg_print();
}
else if (opcode_entered == 0x00000002){
reg_read();
}
else if (opcode_entered == 0x00000003){
reg_write();
}
//test another opcode
else{
ppc_cur_instruction = opcode_entered;
quickinstruction_translate(ppc_state.ppc_pc);
ppc_main_opcode();
if (grab_branch & !grab_exception){
ppc_state.ppc_pc = ppc_next_instruction_address;
grab_branch = 0;
ppc_tbr_update();
}
else if (grab_return | grab_exception){
ppc_state.ppc_pc = ppc_next_instruction_address;
grab_exception = 0;
grab_return = 0;
ppc_tbr_update();
}
else{
ppc_state.ppc_pc += 4;
ppc_tbr_update();
}
}
}
} else if (checker == "debugger") {
enter_debugger();
}
}
else{
std::cout << " " << endl;
std::cout << "Please enter one of the following commands when " << endl;
std::cout << "booting up DingusPPC... " << endl;
std::cout << " " << endl;
std::cout << " " << endl;
std::cout << "realtime - Run the emulator in real-time. " << endl;
std::cout << "loadelf - Load an ELF file to run from RAM. " << endl;
std::cout << "debugger - Enter the interactive debugger. " << endl;
std::cout << "fuzzer - Test every single PPC opcode. " << endl;
std::cout << "stepp - Execute a page of opcodes per key press." << endl;
std::cout << "playground - Mess around with and opcodes. " << endl;
}
delete(heathrow);
delete(machine_id);
delete(mem_ctrl_instance);
//Free memory after the emulation is completed.
free(machine_sysram_mem);
free(machine_sysrom_mem);
return 0;
}
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