[nostalgia] Break part of core out into Turbine and TeaGBA libraries

deps/teagba/src/cstartup.cpp

@@ -0,0 +1,53 @@
+/*
+ * Copyright 2016 - 2023 gary@drinkingtea.net
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <ox/std/heapmgr.hpp>
+
+namespace mgba {
+void initConsole();
+}
+
+#define MEM_EWRAM_BEGIN reinterpret_cast<char*>(0x02000000)
+#define MEM_EWRAM_END   reinterpret_cast<char*>(0x0203FFFF)
+
+#define HEAP_BEGIN reinterpret_cast<char*>(MEM_EWRAM_BEGIN)
+// set size to half of EWRAM
+#define HEAP_SIZE ((MEM_EWRAM_END - MEM_EWRAM_BEGIN) / 2)
+#define HEAP_END  reinterpret_cast<char*>(MEM_EWRAM_BEGIN + HEAP_SIZE)
+
+extern void (*__preinit_array_start[]) (void);
+extern void (*__preinit_array_end[]) (void);
+extern void (*__init_array_start[]) (void);
+extern void (*__init_array_end[]) (void);
+
+int main(int argc, const char **argv);
+
+extern "C" {
+
+void __libc_init_array() {
+	auto preInits = __preinit_array_end - __preinit_array_start;
+	for (decltype(preInits) i = 0; i < preInits; i++) {
+		__preinit_array_start[i]();
+	}
+	auto inits = __init_array_end - __init_array_start;
+	for (decltype(inits) i = 0; i < inits; i++) {
+		__init_array_start[i]();
+	}
+}
+
+int c_start() {
+	const char *args[2] = {"", "rom.oxfs"};
+	ox::heapmgr::initHeap(HEAP_BEGIN, HEAP_END);
+	mgba::initConsole();
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wpedantic"
+	return main(2, args);
+#pragma GCC diagnostic pop
+}
+
+}