249 lines
6.7 KiB
TypeScript
249 lines
6.7 KiB
TypeScript
"use strict";
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import { BaseDebugPlatform, CpuState, EmuState, Platform, DisasmLine, Debuggable } from "../common/baseplatform";
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import { AnimationTimer, EmuHalt, padBytes, PLATFORMS, RasterVideo } from "../common/emu";
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import { loadScript } from "../ide/ui";
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import { hex, lpad } from "../common/util";
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import { ARM32CPU } from "../common/cpu/ARM";
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declare var uc, cs : any; // Unicorn module
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const ARM32_PRESETS = [
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{ id: 'vidfill.vasm', name: 'Video Memory Fill' },
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];
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const SCREEN_WIDTH = 160;
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const SCREEN_HEIGHT = 128;
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const ROM_START_ADDR = 0x0;
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const HIROM_START_ADDR = 0xff800000;
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const ROM_SIZE = 512*1024;
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const RAM_START_ADDR = 0x20000000;
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const RAM_SIZE = 512*1024;
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const CLOCKS_PER_FRAME = 10000;
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interface ARM32State extends EmuState {
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r: Uint32Array; // registers
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}
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class ARM32Platform extends BaseDebugPlatform implements Platform, Debuggable {
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u : any; // Unicorn
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d : any; // Capstone
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mainElement : HTMLElement;
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video : RasterVideo;
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timer : AnimationTimer;
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romSize = 0;
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halted = false;
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state : ARM32State;
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cpu : ARM32CPU;
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constructor(mainElement: HTMLElement) {
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super();
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this.mainElement = mainElement;
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}
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getPresets() { return ARM32_PRESETS };
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async start() {
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console.log("Loading Unicorn/Capstone");
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await loadScript('./lib/unicorn-arm.min.js');
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await loadScript('./lib/capstone-arm.min.js');
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//this.cpu = new ARM32CPU();
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this.u = new uc.Unicorn(uc.ARCH_ARM, uc.MODE_ARM);
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this.u.mem_map(ROM_START_ADDR, ROM_SIZE, uc.PROT_READ | uc.PROT_EXEC);
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this.u.mem_map(HIROM_START_ADDR, ROM_SIZE, uc.PROT_READ | uc.PROT_EXEC);
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this.u.mem_map(RAM_START_ADDR, RAM_SIZE, uc.PROT_READ | uc.PROT_WRITE | uc.PROT_EXEC);
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this.d = new cs.Capstone(cs.ARCH_ARM, cs.MODE_ARM);
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this.video = new RasterVideo(this.mainElement, SCREEN_WIDTH, SCREEN_HEIGHT);
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this.video.create();
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this.timer = new AnimationTimer(60, this.nextFrame.bind(this));
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}
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reset() {
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//this.cpu.reset();
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this.u.reg_write_i32(uc.ARM_REG_PC, 0);
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var cpsr = this.u.reg_read_i32(uc.ARM_REG_CPSR);
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this.u.reg_write_i32(uc.ARM_REG_CPSR, (cpsr & 0xffffff00) | 0b11010011);
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this.u.mem_write(RAM_START_ADDR, new Uint8Array(RAM_SIZE)); // clear RAM
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this.halted = false;
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this.state = null;
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}
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pause(): void {
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this.timer.stop();
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}
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resume(): void {
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this.timer.start();
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console.log('resume')
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}
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isRunning() {
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return this.timer.isRunning();
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}
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isBlocked() {
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return this.halted;
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}
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checkPCOverflow(pc) {
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}
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disassemble(pc:number, read:(addr:number)=>number) : DisasmLine {
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try {
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var b = this.u.mem_read(pc, 8);
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var insns = this.d.disasm(b, pc, 8);
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var i0 = insns[0];
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return {
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nbytes: i0.size,
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line: i0.mnemonic + " " + i0.op_str,
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isaddr: i0.address > 0
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};
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} catch (e) {
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return {
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nbytes: 4,
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line: "???",
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isaddr: false
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};
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}
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}
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advance(novideo?: boolean): number {
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this.state = null;
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var pc = this.getPC();
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var endpc = this.romSize;
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if (pc >= endpc) {
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this.halted = true;
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this.haltAndCatchFire("ROM overrun at PC 0x" + hex(pc));
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this.pause();
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return 1;
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}
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var debugCond = this.getDebugCallback();
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try {
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if (debugCond != null) {
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for (var i=0; i<CLOCKS_PER_FRAME && pc <= endpc; i++) {
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if (debugCond()) {
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break;
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}
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this.u.emu_start(pc, endpc, 0, 1);
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pc = this.getPC();
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}
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} else {
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this.u.emu_start(pc, endpc, 0, CLOCKS_PER_FRAME); // TODO
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}
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} catch (e) {
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throw new EmuHalt(e + " at PC=0x" + hex(this.getPC()));
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}
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if (!novideo) {
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this.updateVideo();
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}
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return CLOCKS_PER_FRAME; //throw new Error("Method not implemented.");
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}
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updateVideo() {
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var vmem8 : Uint8Array = this.u.mem_read(RAM_START_ADDR, SCREEN_WIDTH * SCREEN_HEIGHT * 4);
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var vmem32 = new Uint32Array(vmem8.buffer);
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var pixels = this.video.getFrameData();
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for (var i=0; i<vmem32.length; i++)
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pixels[i] = vmem32[i] | 0xff000000;
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this.video.updateFrame();
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}
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getToolForFilename() {
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return "vasmarm";
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}
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getDefaultExtension() {
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return ".asm";
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}
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loadROM(title, data: Uint8Array) {
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this.romSize = data.length;
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data = padBytes(data, ROM_SIZE);
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this.u.mem_write(ROM_START_ADDR, data);
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this.u.mem_write(HIROM_START_ADDR, data);
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this.state = null;
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this.reset();
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}
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readAddress(addr: number) {
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// TODO: slow
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try {
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return this.u.mem_read(addr, 1)[0];
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} catch (e) {
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return 0;
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}
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}
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getCPUState(): CpuState {
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return {
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PC: this.getPC(),
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SP: this.getSP(),
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};
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}
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isStable(): boolean {
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return true;
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}
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getPC() {
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return this.u.reg_read_i32(uc.ARM_REG_PC);
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}
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getSP() {
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return this.u.reg_read_i32(uc.ARM_REG_SP);
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}
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loadState(state: ARM32State): void {
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for (var i=0; i<uc.ARM_REG_ENDING; i++) {
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this.u.reg_write_i32(i, state.r[i]);
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}
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this.u.mem_write(RAM_START_ADDR, state.b);
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}
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saveState(): ARM32State {
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var regs = new Uint32Array(uc.ARM_REG_ENDING);
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for (var i=0; i<uc.ARM_REG_ENDING; i++) {
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regs[i] = this.u.reg_read_i32(i);
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}
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this.state = {
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c: this.getCPUState(),
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b: this.u.mem_read(RAM_START_ADDR, RAM_SIZE),
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r: regs
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};
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return this.state;
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}
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showHelp(tool: string) {
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if (tool == 'vasmarm') {
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window.open('http://sun.hasenbraten.de/vasm/release/vasm.html');
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}
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}
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getDebugCategories() {
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return ["CPU"];
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}
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getDebugInfo?(category:string, state:ARM32State) : string {
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var s = '';
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for (var i=0; i<13; i++) {
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s += lpad('r'+i, 3) + ' ' + hex(state.r[i+uc.ARM_REG_R0],8) + '\n';
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}
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s += ' SP ' + hex(state.r[uc.ARM_REG_SP],8) + '\n';
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s += ' LR ' + hex(state.r[uc.ARM_REG_LR],8) + '\n';
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s += ' PC ' + hex(state.r[uc.ARM_REG_PC],8) + '\n';
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s += 'CPSR ' + hex(state.r[uc.ARM_REG_CPSR],8) + '\n';
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return s;
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}
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}
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/*
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export abstract class BaseARMMachinePlatform<T extends Machine> extends BaseMachinePlatform<T> {
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//getOpcodeMetadata = getOpcodeMetadata_z80;
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getToolForFilename() { return "armips"; }
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}
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class ARM32Platform extends BaseARMMachinePlatform<ARM32Console> implements Platform {
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async start() {
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console.log("Loading Unicorn");
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await loadScript('./unicorn.js/dist/unicorn-arm.min.js');
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return super.start();
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}
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newMachine() { return new ARM32Console(); }
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getPresets() { return ARM32_PRESETS; }
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getDefaultExtension() { return ".asm"; };
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readAddress(a) { return this.machine.read(a); }
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getMemoryMap = function() { return { main:[
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{name:'Frame Buffer',start:0x2400,size:7168,type:'ram'},
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] } };
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}
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*/
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PLATFORMS['arm32'] = ARM32Platform;
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