1/* Copyright (c) 2013-2015 Jeffrey Pfau
  2 *
  3 * This Source Code Form is subject to the terms of the Mozilla Public
  4 * License, v. 2.0. If a copy of the MPL was not distributed with this
  5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
  6#include "gba/context/context.h"
  7
  8#include "gba/context/overrides.h"
  9
 10#include "util/memory.h"
 11#include "util/vfs.h"
 12
 13static struct VFile* _logFile = 0;
 14static void _GBAContextLog(struct GBAThread* thread, enum GBALogLevel level, const char* format, va_list args);
 15
 16bool GBAContextInit(struct GBAContext* context, const char* port) {
 17	context->gba = anonymousMemoryMap(sizeof(struct GBA));
 18	context->cpu = anonymousMemoryMap(sizeof(struct ARMCore));
 19	context->rom = 0;
 20	context->bios = 0;
 21	context->fname = 0;
 22	context->save = 0;
 23	context->renderer = 0;
 24	GBADirectorySetInit(&context->dirs);
 25	memset(context->components, 0, sizeof(context->components));
 26
 27	if (!context->gba || !context->cpu) {
 28		if (context->gba) {
 29			mappedMemoryFree(context->gba, sizeof(struct GBA));
 30		}
 31		if (context->cpu) {
 32			mappedMemoryFree(context->cpu, sizeof(struct ARMCore));
 33		}
 34		return false;
 35	}
 36	GBACreate(context->gba);
 37	ARMSetComponents(context->cpu, &context->gba->d, GBA_COMPONENT_MAX, context->components);
 38	ARMInit(context->cpu);
 39
 40	GBAConfigInit(&context->config, port);
 41#if !defined(MINIMAL_CORE) || MINIMAL_CORE < 2
 42	if (port) {
 43		if (!_logFile) {
 44			char logPath[PATH_MAX];
 45			GBAConfigDirectory(logPath, PATH_MAX);
 46			strncat(logPath, PATH_SEP "log", PATH_MAX - strlen(logPath));
 47			_logFile = VFileOpen(logPath, O_WRONLY | O_CREAT | O_TRUNC);
 48		}
 49		context->gba->logHandler = _GBAContextLog;
 50
 51		char biosPath[PATH_MAX];
 52		GBAConfigDirectory(biosPath, PATH_MAX);
 53		strncat(biosPath, PATH_SEP "gba_bios.bin", PATH_MAX - strlen(biosPath));
 54
 55		struct GBAOptions opts = {
 56			.bios = biosPath,
 57			.useBios = true,
 58			.idleOptimization = IDLE_LOOP_DETECT,
 59			.logLevel = GBA_LOG_WARN | GBA_LOG_ERROR | GBA_LOG_FATAL | GBA_LOG_STATUS
 60		};
 61		GBAConfigLoad(&context->config);
 62		GBAConfigLoadDefaults(&context->config, &opts);
 63	}
 64#else
 65	UNUSED(port);
 66#endif
 67
 68	context->gba->sync = 0;
 69	return true;
 70}
 71
 72void GBAContextDeinit(struct GBAContext* context) {
 73	ARMDeinit(context->cpu);
 74	GBADestroy(context->gba);
 75	if (context->bios) {
 76		context->bios->close(context->bios);
 77		context->bios = 0;
 78	}
 79	mappedMemoryFree(context->gba, 0);
 80	mappedMemoryFree(context->cpu, 0);
 81	GBAConfigDeinit(&context->config);
 82	GBADirectorySetDeinit(&context->dirs);
 83}
 84
 85bool GBAContextLoadROM(struct GBAContext* context, const char* path, bool autoloadSave) {
 86	context->rom = GBADirectorySetOpenPath(&context->dirs, path, GBAIsROM);
 87	if (!context->rom) {
 88		return false;
 89	}
 90
 91	context->fname = path;
 92#if !defined(MINIMAL_CORE) || MINIMAL_CORE < 2
 93	if (autoloadSave) {
 94		char dirname[PATH_MAX];
 95		char basename[PATH_MAX];
 96		separatePath(context->fname, dirname, basename, 0);
 97		GBADirectorySetAttachBase(&context->dirs, VDirOpen(dirname));
 98		strncat(basename, ".sav", PATH_MAX - strlen(basename) - 1);
 99		context->save = context->dirs.save->openFile(context->dirs.save, basename, O_RDWR | O_CREAT);
100	}
101#else
102	UNUSED(autoloadSave);
103#endif
104	return true;
105}
106
107void GBAContextUnloadROM(struct GBAContext* context) {
108	GBAUnloadROM(context->gba);
109	GBADirectorySetDetachBase(&context->dirs);
110	if (context->rom) {
111		context->rom->close(context->rom);
112		context->rom = 0;
113	}
114	if (context->save) {
115		context->save->close(context->save);
116		context->save = 0;
117	}
118}
119
120bool GBAContextLoadROMFromVFile(struct GBAContext* context, struct VFile* rom, struct VFile* save) {
121	context->rom = rom;
122	if (!GBAIsROM(context->rom)) {
123		context->rom = 0;
124		return false;
125	}
126	context->save = save;
127	return true;
128}
129
130bool GBAContextLoadBIOS(struct GBAContext* context, const char* path) {
131	context->bios = VFileOpen(path, O_RDONLY);
132	if (!context->bios) {
133		return false;
134	}
135
136	if (!GBAIsBIOS(context->bios)) {
137		context->bios->close(context->bios);
138		context->bios = 0;
139		return false;
140	}
141	return true;
142}
143
144bool GBAContextLoadBIOSFromVFile(struct GBAContext* context, struct VFile* bios) {
145	context->bios = bios;
146	if (!GBAIsBIOS(context->bios)) {
147		context->bios = 0;
148		return false;
149	}
150	return true;
151}
152
153bool GBAContextStart(struct GBAContext* context) {
154	struct GBAOptions opts = { .bios = 0 };
155
156	if (context->renderer) {
157		GBAVideoAssociateRenderer(&context->gba->video, context->renderer);
158	}
159
160	if (!GBALoadROM(context->gba, context->rom, context->save, context->fname)) {
161		return false;
162	}
163
164	GBAConfigMap(&context->config, &opts);
165
166	if (!context->bios && opts.bios) {
167		GBAContextLoadBIOS(context, opts.bios);
168	}
169	if (opts.useBios && context->bios) {
170		GBALoadBIOS(context->gba, context->bios);
171	}
172	context->gba->logLevel = opts.logLevel;
173	context->gba->idleOptimization = opts.idleOptimization;
174
175	GBAContextReset(context);
176
177	// TODO: Move this into GBAContextReset
178	if (opts.skipBios) {
179		GBASkipBIOS(context->gba);
180	}
181
182	struct GBACartridgeOverride override;
183	const struct GBACartridge* cart = (const struct GBACartridge*) context->gba->memory.rom;
184	memcpy(override.id, &cart->id, sizeof(override.id));
185	struct Configuration* overrides = 0;
186#if !defined(MINIMAL_CORE) || MINIMAL_CORE < 2
187	overrides = GBAConfigGetOverrides(&context->config);
188	GBAConfigFreeOpts(&opts);
189#endif
190	if (GBAOverrideFind(overrides, &override)) {
191		GBAOverrideApply(context->gba, &override);
192	}
193	return true;
194}
195
196void GBAContextReset(struct GBAContext* context) {
197	ARMReset(context->cpu);
198}
199
200void GBAContextStop(struct GBAContext* context) {
201	UNUSED(context);
202	// TODO?
203}
204
205void GBAContextFrame(struct GBAContext* context, uint16_t keys) {
206	int activeKeys = keys;
207	context->gba->keySource = &activeKeys;
208
209	int frameCounter = context->gba->video.frameCounter;
210	while (frameCounter == context->gba->video.frameCounter) {
211		ARMRunLoop(context->cpu);
212	}
213}
214
215static void _GBAContextLog(struct GBAThread* thread, enum GBALogLevel level, const char* format, va_list args) {
216	UNUSED(thread);
217	UNUSED(level);
218	// TODO: Make this local
219	if (!_logFile) {
220		return;
221	}
222	char out[256];
223	size_t len = vsnprintf(out, sizeof(out), format, args);
224	if (len >= sizeof(out)) {
225		len = sizeof(out) - 1;
226	}
227	out[len] = '\n';
228	_logFile->write(_logFile, out, len + 1);
229}