Add GBA version

CMakeLists.txt

@@ -5,6 +5,8 @@ project(dvm LANGUAGES C)
 if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
 	if(NINTENDO_DS AND ARM9)
 		set(CMAKE_INSTALL_PREFIX "${NDS_ROOT}" CACHE PATH "" FORCE)
+	elseif(NINTENDO_GBA)
+		set(CMAKE_INSTALL_PREFIX "${GBA_ROOT}" CACHE PATH "" FORCE)
 	elseif(NINTENDO_GAMECUBE OR NINTENDO_WII)
 		set(CMAKE_INSTALL_PREFIX "${OGC_ROOT}" CACHE PATH "" FORCE)
 		set(LIB_SUBDIR "/${OGC_SUBDIR}")
@@ -31,10 +33,17 @@ target_compile_options(dvm PRIVATE
 	-Wall
 )
 
-target_compile_definitions(dvm PRIVATE
-	# Disc I/O buffer alignment (should match CPU cache line size)
-	LIBDVM_BUFFER_ALIGN=32
-)
+if (NOT NINTENDO_GBA)
+	target_compile_definitions(dvm PRIVATE
+		# Disc I/O buffer alignment (should match CPU cache line size)
+		LIBDVM_BUFFER_ALIGN=32
+	)
+else()
+	target_compile_definitions(dvm PRIVATE
+		# Disc I/O buffer alignment (should match CPU cache line size)
+		LIBDVM_BUFFER_ALIGN=4
+	)
+endif()
 
 target_include_directories(dvm PRIVATE
 	include
@@ -63,6 +72,10 @@ if(NINTENDO_DS)
 	)
 endif()
 
+if(NINTENDO_GBA)
+	target_sources(dvm PRIVATE source/dvm_libgba.c)
+endif()
+
 if(NINTENDO_GAMECUBE OR NINTENDO_WII)
 	target_sources(dvm PRIVATE source/dvm_libogc.c)
 endif()

Catnip.cmake

@@ -1,6 +1,11 @@
 
 catnip_package(dvm DEFAULT all)
 
+catnip_add_preset(gba
+	TOOLSET    GBA
+	BUILD_TYPE MinSizeRel
+)
+
 catnip_add_preset(ds
 	TOOLSET    NDS
 	BUILD_TYPE Release

source/dvm_libgba.c

@@ -0,0 +1,16 @@
+#include <dvm.h>
+#include <disc.h>
+
+__attribute__((weak)) unsigned g_dvmDefaultCachePages = 2;
+__attribute__((weak)) unsigned g_dvmDefaultSectorsPerPage = 8;
+
+bool dvmInit(bool set_app_cwdir, unsigned cache_pages, unsigned sectors_per_page)
+{
+	unsigned num_mounted = 0;
+
+	// Try mounting the disc interface
+	const DISC_INTERFACE* fat = discGetInterface();
+	num_mounted += dvmProbeMountDiscIface("fat", fat, cache_pages, sectors_per_page);
+
+	return num_mounted != 0;
+}