1/* Copyright (c) 2013-2016 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 "core.h"
  7
  8#include "core/core.h"
  9#include "core/log.h"
 10#include "gba/gba.h"
 11#include "gba/context/overrides.h"
 12#include "gba/renderers/video-software.h"
 13#include "gba/serialize.h"
 14#include "util/memory.h"
 15#include "util/patch.h"
 16#include "util/vfs.h"
 17
 18struct GBACore {
 19	struct mCore d;
 20	struct GBAVideoSoftwareRenderer renderer;
 21	int keys;
 22};
 23
 24static bool _GBACoreInit(struct mCore* core) {
 25	struct GBACore* gbacore = (struct GBACore*) core;
 26
 27	struct ARMCore* cpu = anonymousMemoryMap(sizeof(struct ARMCore));
 28	struct GBA* gba = anonymousMemoryMap(sizeof(struct GBA));
 29	if (!cpu || !gba) {
 30		free(cpu);
 31		free(gba);
 32		return false;
 33	}
 34	core->cpu = cpu;
 35	core->board = gba;
 36
 37	memset(&core->opts, 0, sizeof(core->opts));
 38
 39	GBACreate(gba);
 40	// TODO: Restore debugger and cheats
 41	ARMSetComponents(cpu, &gba->d, 0, 0);
 42	ARMInit(cpu);
 43
 44	GBAVideoSoftwareRendererCreate(&gbacore->renderer);
 45	GBAVideoAssociateRenderer(&gba->video, &gbacore->renderer.d);
 46
 47	gba->keySource = &gbacore->keys;
 48
 49#if !defined(MINIMAL_CORE) || MINIMAL_CORE < 2
 50	mDirectorySetInit(&core->dirs);
 51#endif
 52	
 53	return true;
 54}
 55
 56static void _GBACoreDeinit(struct mCore* core) {
 57	ARMDeinit(core->cpu);
 58	GBADestroy(core->board);
 59	mappedMemoryFree(core->cpu, sizeof(struct ARMCore));
 60	mappedMemoryFree(core->board, sizeof(struct GBA));
 61#if !defined(MINIMAL_CORE) || MINIMAL_CORE < 2
 62	mDirectorySetDeinit(&core->dirs);
 63#endif
 64}
 65
 66static void _GBACoreSetSync(struct mCore* core, struct mCoreSync* sync) {
 67	struct GBA* gba = core->board;
 68	gba->sync = sync;
 69}
 70
 71static void _GBACoreLoadConfig(struct mCore* core) {
 72	struct GBA* gba = core->board;
 73
 74#if !defined(MINIMAL_CORE) || MINIMAL_CORE < 2
 75	struct VFile* bios = 0;
 76	if (core->opts.useBios) {
 77		bios = VFileOpen(core->opts.bios, O_RDONLY);
 78	}
 79	GBALoadBIOS(gba, bios);
 80#endif
 81
 82	const char* idleOptimization = mCoreConfigGetValue(&core->config, "idleOptimization");
 83	if (idleOptimization) {
 84		if (strcasecmp(idleOptimization, "ignore") == 0) {
 85			gba->idleOptimization = IDLE_LOOP_IGNORE;
 86		} else if (strcasecmp(idleOptimization, "remove") == 0) {
 87			gba->idleOptimization = IDLE_LOOP_REMOVE;
 88		} else if (strcasecmp(idleOptimization, "detect") == 0) {
 89			gba->idleOptimization = IDLE_LOOP_DETECT;
 90		}
 91	}
 92}
 93
 94static void _GBACoreDesiredVideoDimensions(struct mCore* core, unsigned* width, unsigned* height) {
 95	UNUSED(core);
 96	*width = VIDEO_HORIZONTAL_PIXELS;
 97	*height = VIDEO_VERTICAL_PIXELS;
 98}
 99
100static void _GBACoreSetVideoBuffer(struct mCore* core, color_t* buffer, size_t stride) {
101	struct GBACore* gbacore = (struct GBACore*) core;
102	gbacore->renderer.outputBuffer = buffer;
103	gbacore->renderer.outputBufferStride = stride;
104}
105
106static struct blip_t* _GBACoreGetAudioChannel(struct mCore* core, int ch) {
107	struct GBA* gba = core->board;
108	switch (ch) {
109	case 0:
110		return gba->audio.psg.left;
111	case 1:
112		return gba->audio.psg.right;
113	default:
114		return NULL;
115	}
116}
117
118static bool _GBACoreLoadROM(struct mCore* core, struct VFile* vf) {
119	return GBALoadROM2(core->board, vf);
120}
121
122static bool _GBACoreLoadSave(struct mCore* core, struct VFile* vf) {
123	return GBALoadSave(core->board, vf);
124}
125
126static bool _GBACoreLoadPatch(struct mCore* core, struct VFile* vf) {
127	if (!vf) {
128		return false;
129	}
130	struct Patch patch;
131	if (!loadPatch(vf, &patch)) {
132		return false;
133	}
134	GBAApplyPatch(core->board, &patch);
135	return true;
136}
137
138static void _GBACoreUnloadROM(struct mCore* core) {
139	return GBAUnloadROM(core->board);
140}
141
142static void _GBACoreReset(struct mCore* core) {
143	struct GBA* gba = (struct GBA*) core->board;
144	ARMReset(core->cpu);
145	if (core->opts.skipBios) {
146		GBASkipBIOS(core->board);
147	}
148
149	struct GBACartridgeOverride override;
150	const struct GBACartridge* cart = (const struct GBACartridge*) gba->memory.rom;
151	memcpy(override.id, &cart->id, sizeof(override.id));
152	struct Configuration* overrides = 0;
153#if !defined(MINIMAL_CORE) || MINIMAL_CORE < 2
154	overrides = mCoreConfigGetOverrides(&core->config);
155#endif
156	if (GBAOverrideFind(overrides, &override)) {
157		GBAOverrideApply(gba, &override);
158	}
159}
160
161static void _GBACoreRunFrame(struct mCore* core) {
162	struct GBA* gba = core->board;
163	int32_t frameCounter = gba->video.frameCounter;
164	while (gba->video.frameCounter == frameCounter) {
165		ARMRunLoop(core->cpu);
166	}
167}
168
169static void _GBACoreRunLoop(struct mCore* core) {
170	ARMRunLoop(core->cpu);
171}
172
173static void _GBACoreStep(struct mCore* core) {
174	ARMRun(core->cpu);
175}
176
177static bool _GBACoreLoadState(struct mCore* core, struct VFile* vf, int flags) {
178	return GBALoadStateNamed(core->board, vf, flags);
179}
180
181static bool _GBACoreSaveState(struct mCore* core, struct VFile* vf, int flags) {
182	return GBASaveStateNamed(core->board, vf, flags);
183}
184
185static void _GBACoreSetKeys(struct mCore* core, uint32_t keys) {
186	struct GBACore* gbacore = (struct GBACore*) core;
187	gbacore->keys = keys;
188}
189
190static void _GBACoreAddKeys(struct mCore* core, uint32_t keys) {
191	struct GBACore* gbacore = (struct GBACore*) core;
192	gbacore->keys |= keys;
193}
194
195static void _GBACoreClearKeys(struct mCore* core, uint32_t keys) {
196	struct GBACore* gbacore = (struct GBACore*) core;
197	gbacore->keys &= ~keys;
198}
199
200static int32_t _GBACoreFrameCounter(struct mCore* core) {
201	struct GBA* gba = core->board;
202	return gba->video.frameCounter;
203}
204
205static int32_t _GBACoreFrameCycles(struct mCore* core) {
206	UNUSED(core);
207	return VIDEO_TOTAL_LENGTH;
208}
209
210static int32_t _GBACoreFrequency(struct mCore* core) {
211	UNUSED(core);
212	return GBA_ARM7TDMI_FREQUENCY;
213}
214
215static void _GBACoreSetRTC(struct mCore* core, struct mRTCSource* rtc) {
216	struct GBA* gba = core->board;
217	gba->rtcSource = rtc;
218}
219
220struct mCore* GBACoreCreate(void) {
221	struct GBACore* gbacore = malloc(sizeof(*gbacore));
222	struct mCore* core = &gbacore->d;
223	core->cpu = 0;
224	core->board = 0;
225	core->init = _GBACoreInit;
226	core->deinit = _GBACoreDeinit;
227	core->setSync = _GBACoreSetSync;
228	core->loadConfig = _GBACoreLoadConfig;
229	core->desiredVideoDimensions = _GBACoreDesiredVideoDimensions;
230	core->setVideoBuffer = _GBACoreSetVideoBuffer;
231	core->getAudioChannel = _GBACoreGetAudioChannel;
232	core->isROM = GBAIsROM;
233	core->loadROM = _GBACoreLoadROM;
234	core->loadSave = _GBACoreLoadSave;
235	core->loadPatch = _GBACoreLoadPatch;
236	core->unloadROM = _GBACoreUnloadROM;
237	core->reset = _GBACoreReset;
238	core->runFrame = _GBACoreRunFrame;
239	core->runLoop = _GBACoreRunLoop;
240	core->step = _GBACoreStep;
241	core->loadState = _GBACoreLoadState;
242	core->saveState = _GBACoreSaveState;
243	core->setKeys = _GBACoreSetKeys;
244	core->addKeys = _GBACoreAddKeys;
245	core->clearKeys = _GBACoreClearKeys;
246	core->frameCounter = _GBACoreFrameCounter;
247	core->frameCycles = _GBACoreFrameCycles;
248	core->frequency = _GBACoreFrequency;
249	core->setRTC = _GBACoreSetRTC;
250	return core;
251}