mirror of
https://github.com/dingusdev/dingusppc.git
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581 lines
20 KiB
C++
581 lines
20 KiB
C++
//DingusPPC
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//Written by divingkatae and maximum
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//(c)2018-20 (theweirdo) spatium
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//Please ask for permission
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//if you want to distribute this.
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//(divingkatae#1017 or powermax#2286 on Discord)
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//The main runfile - main.cpp
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//This is where the magic begins
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#include <iostream>
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#include <map>
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#include <cstring>
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#include <cinttypes>
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#include <array>
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#include <stdio.h>
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#include <fstream>
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#include <stdexcept>
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#include "ppcemu.h"
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#include "ppcmmu.h"
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#include "memreadwrite.h"
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#include "devices/mpc106.h"
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#include "debugger/debugger.h"
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#include "devices/machineid.h"
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#include "devices/macio.h"
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#include "devices/mpc106.h"
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using namespace std;
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/**
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Power Macintosh ROM identification string
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is located in the ConfigInfo structure starting at 0x30D064 (PCI Macs)
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or 0x30C064 (Nubus Macs). This helps a lot to determine which
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hardware is to be used.
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*/
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static const map<string,string> PPCMac_ROMIdentity = { //Codename Abbreviation for...
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{"Alch", "Performa 6400"}, //Alchemy
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{"Come", "PowerBook 2400"}, //Comet
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{"Cord", "Power Mac 5200/6200 series"}, //Cordyceps
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{"Gaze", "Power Mac 6500"}, //Gazelle
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{"Goss", "Power Mac G3 Beige"}, //Gossamer
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{"GRX ", "PowerBook G3 Wallstreet"}, //(Unknown)
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{"Hoop", "PowerBook 3400"}, //Hooper
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{"PBX ", "PowerBook Pre-G3"}, //(Unknown)
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{"PDM ", "Nubus Power Mac or WGS"}, //Piltdown Man (6100/7100/8100)
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{"Pip ", "Pippin... uh... yeah..."}, //Pippin
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{"Powe", "Generic Power Mac"}, //PowerMac?
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{"Spar", "20th Anniversay Mac, you lucky thing."}, //Spartacus
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{"Tanz", "Power Mac 4400"}, //Tanzania
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{"TNT ", "Power Mac 7xxxx/8xxx series"}, //Trinitrotoluene :-)
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{"Zanz", "A complete engima."}, //Zanzibar (mentioned in Sheepshaver's code, but no match to any known ROM)
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{"????", "A clone, perhaps?"} //N/A (Placeholder ID)
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};
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SetPRS ppc_state;
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bool is_nubus = 0;
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bool grab_branch;
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bool grab_exception;
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bool grab_return;
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bool grab_breakpoint;
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uint32_t ppc_cur_instruction; //Current instruction for the PPC
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uint32_t ppc_effective_address;
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uint32_t ppc_real_address;
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uint32_t ppc_next_instruction_address; //Used for branching, setting up the NIA
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uint32_t return_value;
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MemCtrlBase *mem_ctrl_instance = 0;
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HeathrowIC *heathrow = 0;
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GossamerID *machine_id;
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unsigned char * machine_sysram_mem;
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unsigned char * machine_sysrom_mem;
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uint32_t grab_sysram_size;
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uint32_t grab_iocont_size;
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uint32_t grab_sysrom_size;
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uint32_t ram_size_set;
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uint32_t prev_msr_state = 0;
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uint32_t cur_msr_state = 0;
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//MSR Flags
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bool msr_es_change; //Check Endian
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uint32_t rom_file_begin; //where to start storing ROM files in memory
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uint32_t pci_io_end;
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uint32_t rom_filesize;
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uint32_t write_opcode;
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uint8_t write_char;
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//Initialize the PPC's registers.
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void reg_init(){
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for (uint32_t i = 0; i < 32; i++){
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ppc_state.ppc_fpr[i] = 0;
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}
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ppc_state.ppc_pc = 0;
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for (uint32_t i = 0; i < 32; i++){
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ppc_state.ppc_gpr[i] = 0;
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}
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ppc_state.ppc_cr = 0;
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ppc_state.ppc_fpscr = 0;
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ppc_state.ppc_tbr[0] = 0;
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ppc_state.ppc_tbr[1] = 0;
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for (uint32_t i = 0; i < 1024; i++){
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switch(i){
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case 287:
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//Identify as a G3
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//Processor IDS
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// 601 v1 - 00010001
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// 603 v1 - 00030001
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// 604 v1 - 00040001
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// 603e v1 - 00060101
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// 750 v1 - 00080200
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ppc_state.ppc_spr[i] = 0x00080200;
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break;
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/**
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case 528:
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case 536:
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ppc_state.ppc_spr[i] = 0x00001FFE;
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break;
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case 530:
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case 538:
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ppc_state.ppc_spr[i] = 0xC0001FFE;
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break;
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case 532:
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case 540:
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ppc_state.ppc_spr[i] = 0xE0001FFE;
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break;
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case 534:
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case 542:
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ppc_state.ppc_spr[i] = 0xF0001FFE;
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break;
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case 529:
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case 531:
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case 537:
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case 539:
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ppc_state.ppc_spr[i] = 0x00000002;
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break;
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case 533:
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case 541:
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ppc_state.ppc_spr[i] = 0xE0000002;
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break;
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case 535:
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ppc_state.ppc_spr[i] = 0xF0000002;
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break;
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case 543:
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ppc_state.ppc_spr[i] = 0x00000002;
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break;
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**/
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default:
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ppc_state.ppc_spr[i] = 0;
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}
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}
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//Only bit 25 of the MSR is initially set on bootup.
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ppc_state.ppc_msr = 0x40;
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for (uint32_t i = 0; i < 16; i++){
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ppc_state.ppc_sr[i] = 0;
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}
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}
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//Debugging Functions
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uint32_t reg_print(){
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for (uint32_t i = 0; i < 32; i++){
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printf("FPR %d : %" PRIx64 "", i, ppc_state.ppc_fpr[i]);
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}
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ppc_state.ppc_pc = 0;
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for (uint32_t i = 0; i < 32; i++){
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printf("GPR %d : %x", i, ppc_state.ppc_gpr[i]);
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}
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printf("CR : %x", ppc_state.ppc_cr);
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printf("FPSCR : %x", ppc_state.ppc_fpscr);
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printf("TBR 0 : %x", ppc_state.ppc_tbr[0]);
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printf("TBR 1 : %x", ppc_state.ppc_tbr[1]);
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for (uint32_t i = 0; i < 1024; i++){
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printf("SPR %d : %x", i, ppc_state.ppc_spr[i]);
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}
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printf("CR : %x", ppc_state.ppc_cr);
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printf("MSR : %x", ppc_state.ppc_msr);
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for (uint32_t i = 0; i < 16; i++){
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printf("SR %d : %x", i, ppc_state.ppc_sr[i]);
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}
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return 0;
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}
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uint32_t reg_read(){
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uint32_t grab_me = 0;
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std::cout << hex << "TODO: Decide which register to read from; for now, which GPR?" << endl;
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//printf("Which register to read from? 0 - GPR, 1 = FPR, 2 = CR, 3 = FPSCR");
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std::cin >> hex >> grab_me;
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if (grab_me < 32){
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printf("GPR value: %d", ppc_state.ppc_gpr[grab_me]);
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}
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return 0;
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}
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uint32_t reg_write(){
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uint32_t grab_me = 0;
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std::cout << hex << "TODO: Decide which register to write to; for now, which GPR?" << endl;
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//printf("Which register to write to? 0 - GPR, 1 = FPR, 2 = CR, 3 = FPSCR");
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std::cin >> hex >> grab_me;
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if (grab_me < 32){
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printf("GPR value: %d", ppc_state.ppc_gpr[grab_me]);
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}
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return 0;
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}
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int main(int argc, char **argv)
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{
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ram_size_set = 0x4000000; //64 MB of RAM for the Mac
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rom_file_begin = 0xFFF00000; //where to start storing ROM files in memory
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pci_io_end = 0x83FFFFFF;
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rom_filesize = 0x400000;
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//Init virtual CPU.
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reg_init();
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//0xFFF00100 is where the reset vector is.
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//In other words, begin executing code here.
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ppc_state.ppc_pc = 0xFFF00100;
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uint32_t opcode_entered = 0; //used for testing opcodes in playground
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std::cout << "DingusPPC - Prototype 5bf4 (7/14/2019) " << endl;
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std::cout << "Written by divingkatae, (c) 2019. " << endl;
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std::cout << "This is not intended for general use. " << endl;
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std::cout << "Use at your own discretion. " << endl;
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//Open the ROM File.
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ifstream romFile;
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romFile.open("rom.bin", ios::in|ios::binary);
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if (romFile.fail()){
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cerr << "rom.bin not present. Please provide an appropriate ROM file"
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<< " and restart this program.\n";
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romFile.close();
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return 1;
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}
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//Calculate and validate ROM file size.
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romFile.seekg(0, romFile.end);
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rom_filesize = (uint32_t) romFile.tellg();
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printf("Rom SIZE: %d \n", rom_filesize);
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romFile.seekg (0, romFile.beg);
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if (rom_filesize != 0x400000){
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cerr << "Unsupported ROM File size. Expected size is 4 megabytes.\n";
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romFile.close();
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return 1;
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}
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machine_sysram_mem = (unsigned char*) calloc (67108864, 1);
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machine_sysrom_mem = (unsigned char*) calloc (rom_filesize, 1);
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memset(machine_sysram_mem, 0x0, 67108864);
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grab_sysram_size = sizeof(machine_sysram_mem);
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grab_sysrom_size = rom_filesize;
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//Sanity checks - Prevent the input files being too small or too big.
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//Also prevent the ROM area from overflow.
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if (ram_size_set < 0x800000){
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cerr << "The RAM size must be at least 8 MB to function.\n";
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return 1;
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}
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else if (ram_size_set > 0x20000000){
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cerr << "RAM too big. Must be no more than 2 GB.\n";
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return 1;
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}
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rom_file_begin = 0xFFFFFFFF - grab_sysrom_size + 1;
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char configGrab = 0;
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uint32_t configInfoOffset = 0;
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romFile.seekg (0x300082, ios::beg); //This is where the place to get the offset is
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romFile.get(configGrab); //just one byte to determine ConfigInfo location
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configInfoOffset = (uint32_t)(configGrab & 0xff);
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if (configInfoOffset == 0xC0){
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is_nubus = 1;
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}
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uint32_t configInfoAddr = 0x300000 + (configInfoOffset << 8) + 0x69; //address to check the identifier string
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char memPPCBlock[5]; //First four chars are enough to distinguish between codenames
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romFile.seekg (configInfoAddr, ios::beg);
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romFile.read(memPPCBlock, 4);
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memPPCBlock[4] = 0;
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uint32_t rom_id = READ_DWORD_BE(memPPCBlock);
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std::string string_test = std::string(memPPCBlock);
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//Just auto-iterate through the list
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for (auto iter = PPCMac_ROMIdentity.begin(); iter != PPCMac_ROMIdentity.end(); ){
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string redo_me = iter->first;
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if (string_test.compare(redo_me) == 0){
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cout << "The machine is identified as..." << iter->second << endl;
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romFile.seekg (0x0, ios::beg);
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break;
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}
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else{
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iter++;
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}
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}
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switch(rom_id) {
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case 0x476F7373: {
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cout << "Initialize Gossamer hardware..." << endl;
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MPC106 *mpc106 = new MPC106();
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mem_ctrl_instance = mpc106;
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if (!mem_ctrl_instance->add_rom_region(0xFFC00000, 0x400000)) {
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cout << "failure!\n" << endl;
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delete(mem_ctrl_instance);
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romFile.close();
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return 1;
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}
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machine_id = new GossamerID(0x3d8c);
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mpc106->add_mmio_region(0xFF000004, 4096, machine_id);
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heathrow = new HeathrowIC();
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mpc106->pci_register_device(16, heathrow);
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cout << "done" << endl;
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}
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break;
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default:
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cout << "This machine not supported yet." << endl;
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return 1;
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}
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//Read ROM file content and transfer it to the dedicated ROM region
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romFile.read ((char *)machine_sysrom_mem,grab_sysrom_size);
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mem_ctrl_instance->set_data(0xFFC00000, machine_sysrom_mem, rom_filesize);
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romFile.close();
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if (argc > 1){
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string checker = argv[1];
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cout << checker << endl;
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if (checker == "fuzzer"){
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//Brute force every instruction that the PPC can interpret.
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//TODO: Change this so that this goes through user-specified instructions.
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ppc_cur_instruction = 0xFFFFFFFF;
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std::cout << "Testing Opcode: " << ppc_cur_instruction << endl;
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while (ppc_cur_instruction > 0x00000000){
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ppc_main_opcode();
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ppc_cur_instruction--;
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}
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}
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else if ((checker=="1")|(checker=="realtime")|(checker=="/realtime")|(checker=="-realtime")){
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ppc_exec();
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}
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else if ((checker=="e")|(checker=="loadelf")|(checker=="/loadelf")|(checker=="-loadelf")){
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ifstream elfFile;
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uint32_t elf_file_setsize = 0;
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char elf_headerchk [4];
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char elf_bformat [1];
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char elf_machine [2];
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char elf_memoffset [4];
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elfFile.seekg(0, elfFile.end);
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elf_file_setsize = (uint32_t) elfFile.tellg();
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elfFile.seekg (0, elfFile.beg);
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if (elf_file_setsize < 45){
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cerr << "Elf File TOO SMALL. Please make sure it's a legitimate file.";
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return 1;
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}
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else if (elf_file_setsize > ram_size_set){
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cerr << "Elf File TOO BIG. Please make sure it fits within memory.";
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return 1;
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}
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//There's got to be a better way to get fields of info from an ELF file.
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elfFile.seekg(0x0, ios::beg); //ELF file begins here
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elfFile.read(elf_headerchk, 4);
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elfFile.seekg(0x4, ios::cur);
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elfFile.read(elf_bformat, 1);
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elfFile.seekg(0x8, ios::cur);
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elfFile.read(elf_machine, 2);
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elfFile.seekg(0x6, ios::cur);
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elfFile.read(elf_memoffset, 4);
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elfFile.seekg (0, elfFile.beg);
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bool elf_valid_check = (atoi(elf_headerchk) == 0x7F454C46) && (atoi(elf_bformat) == 1) &&\
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((atoi(elf_machine) == 0) | (atoi(elf_machine) == 20));
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if (!elf_valid_check){
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cerr << "The ELF file inserted was not legitimate. Please try again." << endl;
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return 1;
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}
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elfFile.read ((char *)machine_sysram_mem,ram_size_set);
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if (argc > 2){
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string elfname = string(argv[1]);
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elfname = elfname + ".elf";
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elfFile.open(elfname, ios::in|ios::binary);
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}
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else{
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elfFile.open("test.elf", ios::in|ios::binary);
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}
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if (elfFile.fail()){
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cerr << "Please insert the elf file before continuing.\n";
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return 1;
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}
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ppc_state.ppc_pc = atoi(elf_memoffset);
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ppc_exec();
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}
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else if ((checker=="until")|(checker=="/until")|(checker=="-until")){
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uint32_t grab_bp = 0x0;
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std::cout << hex << "Enter the address in hex for where to stop execution." << endl;
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cin >> hex >> grab_bp;
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ppc_exec_until(grab_bp);
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}
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else if (checker=="disas"){
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if (argc > 2){
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checker = argv[1];
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}
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else{
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checker = "\\compile.txt";
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}
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ifstream inFile (checker, ios::binary | ios::ate);
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if (!inFile) {
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cerr << "Unable to open file for assembling.";
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exit(1);
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}
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}
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else if ((checker=="stepi")|(checker=="/stepi")|(checker=="-stepi")){
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std::cout << hex << "Ready to execute an opcode?" << endl;
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string check_q;
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cin >> check_q;
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getline (cin, check_q);
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if (check_q != "No"){
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quickinstruction_translate(ppc_state.ppc_pc);
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ppc_main_opcode();
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if (grab_branch & !grab_exception){
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ppc_state.ppc_pc = ppc_next_instruction_address;
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grab_branch = 0;
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ppc_tbr_update();
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}
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else if (grab_return | grab_exception){
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ppc_state.ppc_pc = ppc_next_instruction_address;
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grab_exception = 0;
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grab_return = 0;
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ppc_tbr_update();
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}
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else{
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ppc_state.ppc_pc += 4;
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ppc_tbr_update();
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}
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}
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}
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else if ((checker=="stepp")|(checker=="/stepp")|(checker=="-stepp")){
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std::cout << hex << "Ready to execute a page of opcodes?" << endl;
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string check_q;
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cin >> check_q;
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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;
|
|
}
|