3DS: Initialize ROM buffer and filesystem in lib

src/platform/3ds/ctru-heap.c

@@ -20,6 +20,12 @@
 */
 
 #include <3ds/types.h>
+#include <3ds/srv.h>
+#include <3ds/gfx.h>
+#include <3ds/sdmc.h>
+#include <3ds/services/apt.h>
+#include <3ds/services/fs.h>
+#include <3ds/services/hid.h>
 #include <3ds/svc.h>
 
 #include "util/common.h"
@@ -33,10 +39,15 @@ extern u32 __ctru_linear_heap_size;
 static u32 __custom_heap_size = 0x02400000;
 static u32 __custom_linear_heap_size = 0x01400000;
 
-uint32_t* romBuffer;
+uint32_t* romBuffer = NULL;
 size_t romBufferSize;
 
+FS_Archive sdmcArchive;
+
 bool allocateRomBuffer(void) {
+	if (romBuffer) {
+		return true;
+	}
 	romBuffer = malloc(0x02000000);
 	if (romBuffer) {
 		romBufferSize = 0x02000000;
@@ -66,3 +77,16 @@ void __system_allocateHeaps() {
 	fake_heap_start = (char*)__ctru_heap;
 	fake_heap_end = fake_heap_start + __ctru_heap_size;
 }
+
+void __appInit(void) {
+	// Initialize services
+	srvInit();
+	aptInit();
+	hidInit();
+
+	fsInit();
+	sdmcInit();
+
+	FSUSER_OpenArchive(&sdmcArchive, ARCHIVE_SDMC, fsMakePath(PATH_EMPTY, ""));
+	allocateRomBuffer();
+}

src/platform/3ds/main.c

@@ -56,8 +56,6 @@ static enum DarkenMode {
 #define AUDIO_SAMPLE_BUFFER (AUDIO_SAMPLES * 16)
 #define DSP_BUFFERS 4
 
-FS_Archive sdmcArchive;
-
 static struct GBA3DSRotationSource {
 	struct mRotationSource d;
 	accelVector accel;
@@ -725,8 +723,6 @@ int main() {
 			NULL, 0, NULL, 0);
 	gspWaitForPSC0();
 
-	FSUSER_OpenArchive(&sdmcArchive, ARCHIVE_SDMC, fsMakePath(PATH_EMPTY, ""));
-
 	struct GUIFont* font = GUIFontCreate();
 
 	if (!font) {

src/platform/test/perf-main.c

@@ -69,7 +69,6 @@ int main(int argc, char** argv) {
 	if (!allocateRomBuffer()) {
 		return 1;
 	}
-	FSUSER_OpenArchive(&sdmcArchive, ARCHIVE_SDMC, fsMakePath(PATH_EMPTY, ""));
 #else
 	signal(SIGINT, _mPerfShutdown);
 #endif