266 lines
9.5 KiB
JavaScript
266 lines
9.5 KiB
JavaScript
"use strict";
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/*
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* Copyright (c) 2024 Steven E. Hugg
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.ARM32Machine = void 0;
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const ARM_1 = require("../common/cpu/ARM");
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const devices_1 = require("../common/devices");
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const emu_1 = require("../common/emu");
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const util_1 = require("../common/util");
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var GBA_KEYCODE_MAP = (0, emu_1.makeKeycodeMap)([
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[emu_1.Keys.A, 0, 0x1],
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[emu_1.Keys.B, 0, 0x2],
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[emu_1.Keys.GP_A, 0, 0x1],
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[emu_1.Keys.GP_B, 0, 0x2],
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[emu_1.Keys.SELECT, 0, 0x4],
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[emu_1.Keys.START, 0, 0x8],
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[emu_1.Keys.RIGHT, 0, 0x10],
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[emu_1.Keys.LEFT, 0, 0x20],
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[emu_1.Keys.UP, 0, 0x40],
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[emu_1.Keys.DOWN, 0, 0x80],
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]);
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const RAM_START = 0x0;
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const RAM_SIZE = 0x100000;
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const ROM_BASE = 0x0;
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const IO_START = 0x4000000;
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const IO_SIZE = 0x100;
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const MAX_SERIAL_CHARS = 1000000;
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const CPU_FREQ = 4000000; // 4 MHz
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const ILLEGAL_OPCODE = 0xedededed;
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class ARM32Machine extends devices_1.BasicScanlineMachine {
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constructor() {
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super();
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this.cpuFrequency = CPU_FREQ; // MHz
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this.canvasWidth = 160;
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this.numTotalScanlines = 256;
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this.numVisibleScanlines = 128;
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this.cpuCyclesPerLine = Math.floor(CPU_FREQ / (256 * 60));
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this.defaultROMSize = RAM_SIZE - ROM_BASE;
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this.sampleRate = 1;
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this.cpu = new ARM_1.ARM32CPU();
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this.ram = new Uint8Array(RAM_SIZE);
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this.ram16 = new Uint16Array(this.ram.buffer);
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this.ram32 = new Uint32Array(this.ram.buffer);
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this.rombase = ROM_BASE;
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this.brightness = 255;
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this.ioregs = new Uint8Array(IO_SIZE);
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this.ioregs32 = new Uint32Array(this.ioregs.buffer);
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// TODO: 32-bit bus?
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this.read = (0, emu_1.newAddressDecoder)([
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[RAM_START, RAM_START + RAM_SIZE - 1, RAM_SIZE - 1, (a) => {
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return this.ram[a];
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}],
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[IO_START, IO_START + IO_SIZE - 1, IO_SIZE - 1, (a, v) => {
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return this.readIO(a);
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}],
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], { defaultval: ILLEGAL_OPCODE & 0xff });
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this.write = (0, emu_1.newAddressDecoder)([
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[RAM_START, RAM_START + RAM_SIZE - 1, RAM_SIZE - 1, (a, v) => {
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this.ram[a] = v;
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}],
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[IO_START, IO_START + IO_SIZE - 1, IO_SIZE - 1, (a, v) => {
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this.writeIO(a, v);
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}],
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]);
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this.read32 = (a) => {
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if (a >= RAM_START && a < RAM_SIZE && (a & 3) == 0) {
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return this.ram32[a >> 2];
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}
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else {
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return this.read(a) | (this.read(a + 1) << 8) | (this.read(a + 2) << 16) | (this.read(a + 3) << 24);
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}
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};
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this.write32 = (a, v) => {
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if (a >= RAM_START && a < RAM_SIZE && (a & 3) == 0) {
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this.ram32[a >> 2] = v;
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}
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else {
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this.write(a, v & 0xff);
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this.write(a + 1, (v >> 8) & 0xff);
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this.write(a + 2, (v >> 16) & 0xff);
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this.write(a + 3, (v >> 24) & 0xff);
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}
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};
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this.connectCPUMemoryBus(this);
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this.handler = (0, emu_1.newKeyboardHandler)(this.inputs, GBA_KEYCODE_MAP);
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}
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connectVideo(pixels) {
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super.connectVideo(pixels);
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this.pixels32 = pixels;
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this.pixels8 = new Uint8Array(pixels.buffer);
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}
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connectSerialIO(serial) {
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this.serial = serial;
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}
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loadROM(rom) {
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super.loadROM(rom);
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}
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reset() {
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this.ram.fill(0);
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if (this.rom) {
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this.ram.set(this.rom, this.rombase);
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}
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super.reset();
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this.serialOut = [];
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this.serialIn = [];
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}
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readAddress(a) {
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if (a >= RAM_START && a < RAM_START + RAM_SIZE)
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return this.read(a);
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else
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return ILLEGAL_OPCODE;
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}
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readIO(a) {
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switch (a) {
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case 0x0:
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return this.inputs[0];
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case 0x20:
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return this.getRasterY() & 0xff;
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case 0x21:
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return this.getRasterY() >> 8;
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case 0x24:
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return this.getRasterX();
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case 0x25:
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return this.getRasterX() >> 8;
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case 0x40:
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return (this.serial.byteAvailable() ? 0x80 : 0) | (this.serial.clearToSend() ? 0x40 : 0);
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case 0x44:
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let evin = this.serialIn.shift();
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if (evin != null) {
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this.serialOut.push(evin);
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return evin.value;
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}
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else
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return 0;
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default:
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return 0;
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}
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}
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writeIO(a, v) {
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this.ioregs[a] = v;
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switch (a) {
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case 0x48:
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if (this.serialOut.length < MAX_SERIAL_CHARS) {
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this.serialOut.push({ op: 'write', value: v, nbits: 8 });
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}
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break;
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}
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}
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startScanline() {
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}
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drawScanline() {
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}
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postFrame() {
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var p32 = this.pixels32;
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const vidbase = this.ioregs32[0x80 >> 2];
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var vbase = (vidbase >> 1) & 0xfffff;
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var mask = this.brightness << 24;
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for (var i = 0; i < p32.length; i++) {
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var col = this.ram16[i + vbase];
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// rrrrrgggggbbbbb0 ->
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// 000rrrrr000ggggg000bbbbb00011111111
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p32[i] = mask | ((col & 31) << 3) | (((col >> 5) & 31) << 11) | (((col >> 10) & 31) << 19);
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}
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}
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getDebugCategories() {
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return ['CPU', 'Stack', 'FPU'];
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}
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getDebugInfo(category, state) {
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switch (category) {
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case 'Stack':
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var s = '';
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var c = state.c;
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var sp = c.gprs[13];
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var fp = c.gprs[11];
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// dump stack using ram32
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for (var i = 0; i < 16; i++) {
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s += (0, util_1.hex)(sp, 8) + ' ' + (0, util_1.hex)(this.ram32[(sp - RAM_START) >> 2], 8);
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if (sp == fp)
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s += ' FP';
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s += '\n';
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sp += 4;
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if (sp >= RAM_START + RAM_SIZE)
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break;
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}
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return s;
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case 'CPU':
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var s = '';
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var c = state.c;
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const EXEC_MODE = { 2: 'Thumb', 4: 'ARM' };
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const REGNAMES = { 15: 'PC', 14: 'LR', 13: 'SP', 12: 'IP', 11: 'FP', 9: 'SB' };
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for (var i = 0; i < 8; i++) {
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let j = i + 8;
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s += (0, util_1.lpad)('r' + i, 5) + ' ' + (0, util_1.hex)(c.gprs[i], 8) + ' ';
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s += (0, util_1.lpad)('r' + j, 5) + ' ' + (0, util_1.hex)(c.gprs[j], 8) + (0, util_1.lpad)(REGNAMES[j] || '', 3) + '\n';
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}
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s += 'Flags ';
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s += c.cpsrN ? " N" : " -";
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s += c.cpsrV ? " V" : " -";
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s += c.cpsrF ? " F" : " -";
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s += c.cpsrZ ? " Z" : " -";
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s += c.cpsrC ? " C" : " -";
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s += c.cpsrI ? " I" : " -";
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s += '\n';
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s += 'MODE ' + EXEC_MODE[c.instructionWidth] + ' ' + MODE_NAMES[c.mode] + '\n';
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s += 'SPSR ' + (0, util_1.hex)(c.spsr, 8) + '\n';
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s += 'cycl ' + c.cycles + '\n';
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return s;
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case 'FPU':
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var s = '';
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var c = state.c;
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for (var i = 0; i < 16; i++) {
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//let j = i+16;
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s += (0, util_1.lpad)('s' + i, 5) + ' ' + (0, util_1.hex)(c.ifprs[i], 8) + ' ' + c.sfprs[i].toPrecision(6);
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if (i & 1) {
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s += (0, util_1.lpad)('d' + (i >> 1), 5) + ' ' + c.dfprs[i >> 1].toPrecision(12);
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}
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s += '\n';
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//s += lpad('s'+j, 5) + ' ' + lpad(c.sfprs[j]+'',8) + '\n';
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}
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return s;
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}
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}
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saveState() {
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var state = super.saveState();
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state.serial = {
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sin: this.serialIn.slice(0),
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sout: this.serialOut.slice(0)
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};
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return state;
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}
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loadState(state) {
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super.loadState(state);
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this.serialIn = state.serial.sin;
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this.serialOut = state.serial.sout;
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}
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}
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exports.ARM32Machine = ARM32Machine;
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const MODE_NAMES = {
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0x10: "USER",
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0x11: "FIQ",
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0x12: "IRQ",
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0x13: "SUPERVISOR",
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0x17: "ABORT",
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0x1b: "UNDEFINED",
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0x1f: "SYSTEM",
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};
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//# sourceMappingURL=arm32.js.map
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