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#![allow(clippy::new_without_default)]
#![allow(clippy::unusual_byte_groupings)]
use std::{
collections::HashMap,
sync::mpsc::TryRecvError,
time::{Duration, Instant},
};
use armv4t_emu::{reg, Cpu, Exception, Memory, Mode};
use crate::mem::{Ctsi, Event, GenSIO, GensioState, Mem, Uif};
mod currentcontroller;
mod mem;
use currentcontroller::CurrentController;
fn main() {
simple_logger::SimpleLogger::new()
.with_level(log::LevelFilter::Info)
.with_module_level("nokia3310emu::currentcontroller", log::LevelFilter::Trace)
//.with_module_level("pc_all", log::LevelFilter::Trace)
.with_module_level("eec46_jmp", log::LevelFilter::Trace)
.with_module_level("armv4t_emu", log::LevelFilter::Info)
.env()
.with_colors(true)
.init()
.unwrap();
// Channel so the memory controller can tell us when memory mapped
// IO is activated
let (mut tx, mut rx) = std::sync::mpsc::sync_channel::<Event>(10);
// Setup Memory
let mut memory_array = vec![0; 0x800000];
let file = std::fs::read("My 3310 NR1 v5.79.fls").unwrap();
//let file = std::fs::read("FuBu3310 v6.39 (PPM B).fls").unwrap();
memory_array[0x00200000..0x003FFFFF + 1].copy_from_slice(&file);
let mut mem = Mem {
inner: &mut memory_array,
tx,
};
// Current Controller (CCont)
let mut ccont = CurrentController::new();
// Setup CPU
let mut cpu = Cpu::new();
// We don't have a bootloader. Hope everything is okay and jump straight
// to where the bootloader does
cpu.reg_set(Mode::User, reg::PC, 0x200040);
let mut hit_eec46 = false;
// Main loop
let mut last_pc = 0x0;
let mut print_all_pc = false;
let mut jump_counter = JumpCounter::default();
let known_jumps = vec![
0x002ef9e6, // Delay_r0_loop
];
let start = Instant::now();
let run_duration = Duration::from_millis(5000);
'cpustep: while cpu.step(&mut mem) {
// Log jumps to make debugging easier. We can look at these
// addresses in Ghidra
let pc = cpu.reg_get(Mode::User, reg::PC);
if print_all_pc {
log::trace!(target: "pc_all", "[{}] {pc:08x}", pc as isize - last_pc as isize);
}
if (pc as isize - last_pc as isize).abs() > 4 {
log::trace!("jump detect - {last_pc:08X} => {pc:08X}",);
let count = jump_counter.jump(last_pc, pc);
if count >= 100 && count % 100 == 0 && !known_jumps.contains(&pc) {
log::trace!(target: "eec46_jmp", "[{count:<6}] {last_pc:08x} => {pc:08x}");
}
}
if pc == 0x002eebec && last_pc != 0x002eebec {
log::info!("Entered eebec loop!");
}
if pc == 0x002eec44 {
//let r5 = cpu.reg_get(Mode::User, 5);
// We set R5 here because the next two instructions are as follows:
// [MainLoop?] eec46: cmp r5, 0x1
// eec48: bne [MainLoop?]
// So if we do not set r5 to 0x1, we'll loop back to eec46 forever
log::warn!("hit eec44... setting register 5!");
cpu.reg_set(Mode::User, 5, 0x1);
}
if pc == 0x002eec46 && !hit_eec46 {
hit_eec46 = true;
print_all_pc = true;
log::info!("hit eec46!");
} else if pc != 0x002eec48 && pc != 0x002eec46 && hit_eec46 {
hit_eec46 = false;
print_all_pc = true;
log::warn!("broke from eec46! (pc = {pc:x})");
}
if last_pc == 0x002e8c0e {
//log::error!("right after e8c0e // pc = {pc:08x}");
//break 'cpustep;
}
last_pc = pc;
if pc == 0x002eec52 {
log::info!("hit eec52!");
}
if pc == 0x002e8c0e {
log::warn!("hit e8c0e! setting r0 = 0x81");
cpu.reg_set(Mode::User, 0, 0x81);
}
match rx.try_recv() {
Err(TryRecvError::Empty) => (),
Err(TryRecvError::Disconnected) => panic!("event sender disconnected"),
Ok(event) => match event {
Event::GenSIO(GenSIO::StartTransaction) => {
let start_byte = mem.inner[Mem::GENSIO_START_TRANSACTION];
if start_byte == 0x25 {
mem.gensio_status_clear();
mem.set_gensio_status(GensioState::DataWrite);
mem.set_gensio_status(GensioState::TransactionReady);
}
}
Event::GenSIO(GenSIO::CContWrite) => ccont.event(&mut mem),
Event::GenSIO(GenSIO::LcdCtrl) => {
let dog = mem.inner[Mem::GENSIO_LCD_CTRL];
log::info!("GENSIO LCD Mystery {dog:02X} -- {dog:08b}");
//mem.inner[Mem::UIF_CTRL_IO_2] = 0b0010_0000;
}
Event::Ctsi(Ctsi::AsicWatchdog) => {
let dog = mem.inner[Mem::CTSI_ASIC_WATCHDOG];
log::info!("CTSI Clock ={dog}");
}
Event::Ctsi(Ctsi::WriteClockControl) => {
let clock = mem.inner[Mem::CTSI_CLOCK_CONTROL];
log::info!("CTSI Clock {clock:08b}");
}
Event::Uif(Uif::CtrlIo2) => {
let ctrl = mem.inner[Mem::UIF_CTRL_IO_2];
log::info!("CTSI Clock {ctrl:08b}");
}
},
}
if start.elapsed() >= run_duration {
log::error!("hit run_duration max runtime. breaking from cpustep loop");
break 'cpustep;
}
// Run slow
std::thread::sleep(Duration::from_micros(10));
}
println!("cpu halted");
}
#[derive(Debug, Default)]
pub struct JumpCounter {
jmps: Vec<Jump>,
}
impl JumpCounter {
pub fn jump(&mut self, from: u32, to: u32) -> usize {
match self.jmps.iter_mut().find(|j| j.from == from && j.to == to) {
None => {
self.jmps.push(Jump::new(from, to));
1
}
Some(jmp) => {
jmp.count += 1;
jmp.count
}
}
}
}
#[derive(Debug)]
pub struct Jump {
from: u32,
to: u32,
count: usize,
}
impl Jump {
pub fn new(from: u32, to: u32) -> Self {
Self { from, to, count: 1 }
}
}
pub struct Lcd {
pub data: [u8; 44 * 84],
}
|
