cc377d5d18
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6929 a1c6a512-1295-4272-9138-f99709370657
132 lines
3.7 KiB
C
132 lines
3.7 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Gameboy emulator based on gnuboy
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "plugin.h"
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#include "loader.h"
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#include "rockmacros.h"
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#if MEM <= 8 && !defined(SIMULATOR)
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/* On archos this is loaded as an overlay */
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/* These are defined in the linker script */
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extern unsigned char ovl_start_addr[];
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extern unsigned char ovl_end_addr[];
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const struct {
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unsigned long magic;
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unsigned char *start_addr;
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unsigned char *end_addr;
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enum plugin_status (*entry_point)(struct plugin_api*, void*);
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} header __attribute__ ((section (".header"))) = {
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0x524f564c, /* ROVL */
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ovl_start_addr, ovl_end_addr, plugin_start
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};
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#endif
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#ifdef USE_IRAM
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extern char iramcopy[];
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extern char iramstart[];
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extern char iramend[];
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#endif
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/* here is a global api struct pointer. while not strictly necessary,
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it's nice not to have to pass the api pointer in all function calls
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in the plugin */
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struct plugin_api* rb;
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int shut,cleanshut;
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char *errormsg;
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int gnuboy_main(char *rom);
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void pcm_close(void);
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void die(char *message, ...)
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{
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shut=1;
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errormsg=message;
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}
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void *audio_bufferbase;
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void *audio_bufferpointer;
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unsigned int audio_buffer_free;
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void *my_malloc(size_t size)
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{
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void *alloc;
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if (size + 4 > audio_buffer_free)
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return 0;
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alloc = audio_bufferpointer;
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audio_bufferpointer += size + 4;
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audio_buffer_free -= size + 4;
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return alloc;
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}
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void setmallocpos(void *pointer)
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{
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audio_bufferpointer = pointer;
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audio_buffer_free = audio_bufferpointer - audio_bufferbase;
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}
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/* this is the plugin entry point */
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enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
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{
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/* this macro should be called as the first thing you do in the plugin.
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it test that the api version and model the plugin was compiled for
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matches the machine it is running on */
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TEST_PLUGIN_API(api);
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/* if you are using a global api pointer, don't forget to copy it!
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otherwise you will get lovely "I04: IllInstr" errors... :-) */
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rb = api;
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if (!parameter) {
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rb->splash(HZ*3, true, "Play gameboy ROM file! (.gb/.gbc)");
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return PLUGIN_OK;
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}
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audio_bufferbase = audio_bufferpointer
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= rb->plugin_get_audio_buffer(&audio_buffer_free);
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#if MEM <= 8 && !defined(SIMULATOR)
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/* loaded as an overlay, protect from overwriting ourselves */
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if ((unsigned)(ovl_start_addr - (unsigned char *)audio_bufferbase)
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< audio_buffer_free)
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audio_buffer_free = ovl_start_addr - (unsigned char *)audio_bufferbase;
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#endif
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#ifdef USE_IRAM
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memcpy(iramstart, iramcopy, iramend-iramstart);
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#endif
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shut=0;
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cleanshut=0;
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/* now go ahead and have fun! */
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/* rb->splash(HZ*2, true, "Rockboy v0.3"); */
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/* rb->lcd_clear_display(); */
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gnuboy_main(parameter);
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if(shut&&!cleanshut) {
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rb->splash(HZ*2, true, errormsg);
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return PLUGIN_ERROR;
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}
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pcm_close();
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rb->splash(HZ*2, true, "Shutting down.. byebye ^^");
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cleanup();
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return PLUGIN_OK;
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}
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