3 * Copyright (C) 2006 Exophase <exophase@gmail.com>
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation; either version 2 of
8 * the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 //PSP_MODULE_INFO("gpSP", 0x1000, 0, 6);
25 //PSP_MAIN_THREAD_ATTR(THREAD_ATTR_USER);
27 void vblank_interrupt_handler(u32 sub, u32 *parg);
33 //debug_state current_debug_state = COUNTDOWN_BREAKPOINT;
34 //debug_state current_debug_state = PC_BREAKPOINT;
35 u32 breakpoint_value = 0x7c5000;
36 debug_state current_debug_state = RUN;
37 //debug_state current_debug_state = STEP_RUN;
39 //u32 breakpoint_value = 0;
42 frameskip_type current_frameskip_type = manual_frameskip; //manual; //auto_frameskip;
43 u32 global_cycles_per_instruction = 1;
45 frameskip_type current_frameskip_type = auto_frameskip;
46 u32 global_cycles_per_instruction = 1;
52 u32 frameskip_value = 2;
54 u64 last_frame_interval_timestamp;
56 u32 skip_next_frame = 0;
58 u32 frameskip_counter = 0;
63 u32 execute_cycles = 960;
64 s32 video_count = 960;
71 u32 cycle_memory_access = 0;
72 u32 cycle_pc_relative_access = 0;
73 u32 cycle_sp_relative_access = 0;
74 u32 cycle_block_memory_access = 0;
75 u32 cycle_block_memory_sp_access = 0;
76 u32 cycle_block_memory_words = 0;
77 u32 cycle_dma16_words = 0;
78 u32 cycle_dma32_words = 0;
79 u32 flush_ram_count = 0;
80 u32 gbc_update_count = 0;
81 u32 oam_update_count = 0;
83 u32 synchronize_flag = 1;
85 u32 update_backup_flag = 1;
87 u32 clock_speed = 200;
89 u32 clock_speed = 333;
93 void trigger_ext_event();
95 #define check_count(count_var) \
96 if(count_var < execute_cycles) \
97 execute_cycles = count_var; \
99 #define check_timer(timer_number) \
100 if(timer[timer_number].status == TIMER_PRESCALE) \
101 check_count(timer[timer_number].count); \
103 #define update_timer(timer_number) \
104 if(timer[timer_number].status != TIMER_INACTIVE) \
106 if(timer[timer_number].status != TIMER_CASCADE) \
108 timer[timer_number].count -= execute_cycles; \
109 io_registers[REG_TM##timer_number##D] = \
110 -(timer[timer_number].count >> timer[timer_number].prescale); \
113 if(timer[timer_number].count <= 0) \
115 if(timer[timer_number].irq == TIMER_TRIGGER_IRQ) \
116 irq_raised |= IRQ_TIMER##timer_number; \
118 if((timer_number != 3) && \
119 (timer[timer_number + 1].status == TIMER_CASCADE)) \
121 timer[timer_number + 1].count--; \
122 io_registers[REG_TM0D + (timer_number + 1) * 2] = \
123 -(timer[timer_number + 1].count); \
126 if(timer_number < 2) \
128 if(timer[timer_number].direct_sound_channels & 0x01) \
129 sound_timer(timer[timer_number].frequency_step, 0); \
131 if(timer[timer_number].direct_sound_channels & 0x02) \
132 sound_timer(timer[timer_number].frequency_step, 1); \
135 timer[timer_number].count += \
136 (timer[timer_number].reload << timer[timer_number].prescale); \
140 static const char *file_ext[] = { ".gba", ".bin", ".zip", NULL };
143 static void ChangeWorkingDirectory(char *exe)
146 char *s = strrchr(exe, '/');
155 static void switch_to_romdir(void)
160 file_open(romdir_file, "romdir.txt", read);
162 if(file_check_valid(romdir_file))
164 r = file_read(romdir_file, buff, sizeof(buff) - 1);
168 while (r > 0 && isspace(buff[r-1]))
172 file_close(romdir_file);
176 static void save_romdir(void)
180 snprintf(buff, sizeof(buff), "%s" PATH_SEPARATOR "romdir.txt", main_path);
181 file_open(romdir_file, buff, write);
183 if(file_check_valid(romdir_file))
185 if (getcwd(buff, sizeof(buff)))
187 file_write(romdir_file, buff, strlen(buff));
189 file_close(romdir_file);
193 void ChangeWorkingDirectory(char *exe) {}
194 static void switch_to_romdir(void) {}
195 static void save_romdir(void) {}
204 for(i = 0; i < 4; i++)
206 dma[i].start_type = DMA_INACTIVE;
207 dma[i].direct_sound_channel = DMA_NO_DIRECT_SOUND;
208 timer[i].status = TIMER_INACTIVE;
209 timer[i].reload = 0x10000;
210 timer[i].stop_cpu_ticks = 0;
213 timer[0].direct_sound_channels = TIMER_DS_CHANNEL_BOTH;
214 timer[1].direct_sound_channels = TIMER_DS_CHANNEL_NONE;
219 execute_cycles = 960;
222 flush_translation_cache_rom();
223 flush_translation_cache_ram();
224 flush_translation_cache_bios();
227 int main(int argc, char *argv[])
229 char bios_filename[512];
233 sceKernelRegisterSubIntrHandler(PSP_VBLANK_INT, 0,
234 vblank_interrupt_handler, NULL);
235 sceKernelEnableSubIntr(PSP_VBLANK_INT, 0);
238 init_gamepak_buffer();
240 // Copy the directory path of the executable into main_path
242 // ChangeWorkingDirectory will null out the filename out of the path
243 ChangeWorkingDirectory(argv[0]);
245 getcwd(main_path, 512);
256 gamepak_filename[0] = 0;
260 sprintf(bios_filename, "%s" PATH_SEPARATOR "%s", main_path, "gba_bios.bin");
261 ret = load_bios(bios_filename);
263 ret = load_bios("gba_bios.bin");
266 gui_action_type gui_action = CURSOR_NONE;
268 debug_screen_start();
269 debug_screen_printl(" ");
270 debug_screen_printl("Sorry, but gpSP requires a Gameboy Advance BIOS ");
271 debug_screen_printl("image to run correctly. Make sure to get an ");
272 debug_screen_printl("authentic one, it'll be exactly 16384 bytes large ");
273 debug_screen_printl("and should have the following md5sum value: ");
274 debug_screen_printl(" ");
275 debug_screen_printl("a860e8c0b6d573d191e4ec7db1b1e4f6 ");
276 debug_screen_printl(" ");
277 debug_screen_printl("When you do get it name it gba_bios.bin and put it");
279 debug_screen_printl("in <SD card>/pandora/appdata/gpsp/ . ");
281 debug_screen_printl("in the same directory as gpSP. ");
283 debug_screen_printl(" ");
284 debug_screen_printl("Press any button to exit. ");
286 debug_screen_update();
288 while(gui_action == CURSOR_NONE)
290 gui_action = get_gui_input();
299 if(bios_rom[0] != 0x18)
301 gui_action_type gui_action = CURSOR_NONE;
303 debug_screen_start();
304 debug_screen_printl("You have an incorrect BIOS image. ");
305 debug_screen_printl("While many games will work fine, some will not. It");
306 debug_screen_printl("is strongly recommended that you obtain the ");
307 debug_screen_printl("correct BIOS file. Do NOT report any bugs if you ");
308 debug_screen_printl("are seeing this message. ");
309 debug_screen_printl(" ");
310 debug_screen_printl("Press any button to resume, at your own risk. ");
312 debug_screen_update();
314 while(gui_action == CURSOR_NONE)
316 gui_action = get_gui_input();
328 video_resolution_large();
332 if(load_gamepak(argv[1]) == -1)
335 printf("Failed to load gamepak %s, exiting.\n", argv[1]);
340 set_gba_resolution(screen_scale);
341 video_resolution_small();
348 char load_filename[512];
350 if(load_file(file_ext, load_filename) == -1)
356 if(load_gamepak(load_filename) == -1)
359 printf("Failed to load gamepak %s, exiting.\n", load_filename);
365 set_gba_resolution(screen_scale);
366 video_resolution_small();
375 // We'll never actually return from here.
378 execute_arm_translate(execute_cycles);
381 /* u8 current_savestate_filename[512];
382 get_savestate_filename_noshot(savestate_slot,
383 current_savestate_filename);
384 load_state(current_savestate_filename); */
390 current_debug_state = COUNTDOWN_BREAKPOINT;
391 breakpoint_value = strtol(argv[2], NULL, 16);
396 execute_arm_translate(execute_cycles);
397 execute_arm(execute_cycles);
402 void print_memory_stats(u32 *counter, u32 *region_stats, char *stats_str)
404 u32 other_region_counter = region_stats[0x1] + region_stats[0xE] +
406 u32 rom_region_counter = region_stats[0x8] + region_stats[0x9] +
407 region_stats[0xA] + region_stats[0xB] + region_stats[0xC] +
409 u32 _counter = *counter;
411 printf("memory access stats: %s (out of %d)\n", stats_str, _counter);
412 printf("bios: %f%%\tiwram: %f%%\tewram: %f%%\tvram: %f\n",
413 region_stats[0x0] * 100.0 / _counter, region_stats[0x3] * 100.0 /
415 region_stats[0x2] * 100.0 / _counter, region_stats[0x6] * 100.0 /
418 printf("oam: %f%%\tpalette: %f%%\trom: %f%%\tother: %f%%\n",
419 region_stats[0x7] * 100.0 / _counter, region_stats[0x5] * 100.0 /
421 rom_region_counter * 100.0 / _counter, other_region_counter * 100.0 /
425 memset(region_stats, 0, sizeof(u32) * 16);
428 u32 event_cycles = 0;
429 const u32 event_cycles_trigger = 60 * 5;
432 void trigger_ext_event()
434 static u32 event_number = 0;
435 static u64 benchmark_ticks[16];
437 char current_savestate_filename[512];
443 get_ticks_us(&new_ticks);
444 benchmark_ticks[event_number - 1] =
445 new_ticks - benchmark_ticks[event_number - 1];
448 current_frameskip_type = no_frameskip;
450 synchronize_flag = 0;
452 get_savestate_filename_noshot(savestate_slot,
453 current_savestate_filename);
454 load_state(current_savestate_filename);
459 // Full benchmark, run normally
468 // No video benchmark
469 // Set frameskip really high + manual
470 current_frameskip_type = manual_frameskip;
471 frameskip_value = 1000000;
476 // Put CPU in halt mode, put it in IRQ mode with interrupts off
477 reg[CPU_HALT_STATE] = CPU_HALT;
478 reg[REG_CPSR] = 0xD2;
482 // No CPU or video benchmark
483 reg[CPU_HALT_STATE] = CPU_HALT;
484 reg[REG_CPSR] = 0xD2;
485 current_frameskip_type = manual_frameskip;
486 frameskip_value = 1000000;
492 char *print_strings[] =
505 benchmark_ticks[6] = benchmark_ticks[0] - benchmark_ticks[2];
506 benchmark_ticks[5] = benchmark_ticks[0] - benchmark_ticks[4] -
508 benchmark_ticks[7] = benchmark_ticks[0] - benchmark_ticks[1];
510 printf("Benchmark results (%d frames): \n", event_cycles_trigger);
511 for(i = 0; i < 8; i++)
513 printf(" %s: %d ms (%f ms per frame)\n",
514 print_strings[i], (u32)benchmark_ticks[i] / 1000,
515 (float)(benchmark_ticks[i] / (1000.0 * event_cycles_trigger)));
525 get_ticks_us(benchmark_ticks + event_number);
530 static u32 frames_drawn = 60;
534 irq_type irq_raised = IRQ_NONE;
538 cpu_ticks += execute_cycles;
540 reg[CHANGED_PC_STATUS] = 0;
545 update_gbc_sound(cpu_ticks);
546 gbc_sound_update = 0;
554 video_count -= execute_cycles;
558 u32 vcount = io_registers[REG_VCOUNT];
559 u32 dispstat = io_registers[REG_DISPSTAT];
561 if((dispstat & 0x02) == 0)
563 // Transition from hrefresh to hblank
564 video_count += (272);
567 if((dispstat & 0x01) == 0)
574 io_registers[REG_BLDCNT] = 0;
577 // If in visible area also fire HDMA
578 for(i = 0; i < 4; i++)
580 if(dma[i].start_type == DMA_START_HBLANK)
581 dma_transfer(dma + i);
586 irq_raised |= IRQ_HBLANK;
590 // Transition from hblank to next line
598 // Transition from vrefresh to vblank
604 irq_raised |= IRQ_VBLANK;
607 affine_reference_x[0] =
608 (s32)(address32(io_registers, 0x28) << 4) >> 4;
609 affine_reference_y[0] =
610 (s32)(address32(io_registers, 0x2C) << 4) >> 4;
611 affine_reference_x[1] =
612 (s32)(address32(io_registers, 0x38) << 4) >> 4;
613 affine_reference_y[1] =
614 (s32)(address32(io_registers, 0x3C) << 4) >> 4;
616 for(i = 0; i < 4; i++)
618 if(dma[i].start_type == DMA_START_VBLANK)
619 dma_transfer(dma + i);
626 // Transition from vblank to next screen
631 /* printf("frame update (%x), %d instructions total, %d RAM flushes\n",
632 reg[REG_PC], instruction_count - last_frame, flush_ram_count);
633 last_frame = instruction_count;
635 /* printf("%d gbc audio updates\n", gbc_update_count);
636 printf("%d oam updates\n", oam_update_count); */
637 gbc_update_count = 0;
638 oam_update_count = 0;
645 update_gbc_sound(cpu_ticks);
649 char print_buffer[32];
650 sprintf(print_buffer, "%2d (%2d)", fps, frames_drawn);
651 print_string(print_buffer, 0xFFFF, 0x000, 0, 0);
653 if(!synchronize_flag)
654 print_string("-FF-", 0xFFFF, 0x000, 216, 0);
660 if(update_backup_flag)
666 if(event_cycles == event_cycles_trigger)
675 if(vcount == (dispstat >> 8))
681 irq_raised |= IRQ_VCOUNT;
689 io_registers[REG_VCOUNT] = vcount;
691 io_registers[REG_DISPSTAT] = dispstat;
695 raise_interrupt(irq_raised);
697 execute_cycles = video_count;
703 } while(reg[CPU_HALT_STATE] != CPU_ACTIVE);
705 return execute_cycles;
710 u32 real_frame_count = 0;
711 u32 virtual_frame_count = 0;
712 u32 num_skipped_frames = 0;
714 void vblank_interrupt_handler(u32 sub, u32 *parg)
721 char char_buffer[64];
722 u64 new_ticks, time_delta;
723 s32 used_frameskip = frameskip_value;
725 if(!synchronize_flag)
728 virtual_frame_count = real_frame_count - 1;
733 virtual_frame_count++;
735 if(real_frame_count >= virtual_frame_count)
737 if((real_frame_count > virtual_frame_count) &&
738 (current_frameskip_type == auto_frameskip) &&
739 (num_skipped_frames < frameskip_value))
742 num_skipped_frames++;
746 virtual_frame_count = real_frame_count;
747 num_skipped_frames = 0;
750 // Here so that the home button return will eventually work.
751 // If it's not running fullspeed anyway this won't really hurt
759 sceDisplayWaitVblankStart();
762 if(current_frameskip_type == manual_frameskip)
764 frameskip_counter = (frameskip_counter + 1) %
765 (used_frameskip + 1);
768 if(frameskip_counter != (rand() % (used_frameskip + 1)))
773 if(frameskip_counter)
778 /* sprintf(char_buffer, "%08d %08d %d %d %d\n",
779 real_frame_count, virtual_frame_count, num_skipped_frames,
780 real_frame_count - virtual_frame_count, skip_next_frame);
781 print_string(char_buffer, 0xFFFF, 0x0000, 0, 10); */
784 sprintf(char_buffer, "%02d %02d %06d %07d", frameskip, (u32)ms_needed,
785 ram_translation_ptr - ram_translation_cache, rom_translation_ptr -
786 rom_translation_cache);
787 print_string(char_buffer, 0xFFFF, 0x0000, 0, 0);
793 u32 real_frame_count = 0;
794 u32 virtual_frame_count = 0;
795 u32 num_skipped_frames = 0;
796 u32 interval_skipped_frames;
799 const u32 frame_interval = 60;
806 get_ticks_us(&new_ticks);
809 virtual_frame_count++;
811 real_frame_count = (new_ticks * 3) / 50000;
813 if(real_frame_count >= virtual_frame_count)
815 if((real_frame_count > virtual_frame_count) &&
816 (current_frameskip_type == auto_frameskip) &&
817 (num_skipped_frames < frameskip_value))
820 num_skipped_frames++;
824 virtual_frame_count = real_frame_count;
825 num_skipped_frames = 0;
828 else if (synchronize_flag)
830 #if defined(PND_BUILD) || defined(RPI_BUILD)
832 #elif !defined(GP2X_BUILD) // sleeping on GP2X is a bad idea
833 delay_us((u64)virtual_frame_count * 50000 / 3 - new_ticks + 2);
839 if(frames == frame_interval)
842 u32 new_frames_drawn;
844 time_delta = new_ticks - last_frame_interval_timestamp;
845 new_fps = (u64)((u64)1000000 * (u64)frame_interval) / time_delta;
847 (frame_interval - interval_skipped_frames) * (60 / frame_interval);
849 // Left open for rolling averages
851 frames_drawn = new_frames_drawn;
853 last_frame_interval_timestamp = new_ticks;
854 interval_skipped_frames = 0;
858 if(current_frameskip_type == manual_frameskip)
860 frameskip_counter = (frameskip_counter + 1) %
861 (frameskip_value + 1);
864 if(frameskip_counter != (rand() % (frameskip_value + 1)))
869 if(frameskip_counter)
874 interval_skipped_frames += skip_next_frame;
876 #if !defined(GP2X_BUILD) && !defined(PND_BUILD) && !defined(RPI_BUILD)
877 char char_buffer[64];
878 sprintf(char_buffer, "gpSP: %2d (%2d) fps", fps, frames_drawn);
879 SDL_WM_SetCaption(char_buffer, "gpSP");
889 if(!update_backup_flag)
890 update_backup_force();
894 #ifdef REGISTER_USAGE_ANALYZE
895 print_register_usage();
921 u32 file_length(char *filename, s32 dummy)
924 sceIoGetstat(filename, &stats);
925 return stats.st_size;
928 void delay_us(u32 us_count)
930 sceKernelDelayThread(us_count);
933 void get_ticks_us(u64 *tick_return)
936 sceRtcGetCurrentTick(&ticks);
938 *tick_return = (ticks * 1000000) / sceRtcGetTickResolution();
943 u32 file_length(char *dummy, FILE *fp)
947 fseek(fp, 0, SEEK_END);
949 fseek(fp, 0, SEEK_SET);
956 void delay_us(u32 us_count)
958 SDL_Delay(us_count / 1000);
961 void get_ticks_us(u64 *ticks_return)
963 *ticks_return = (u64)SDL_GetTicks() * 1000;
968 void delay_us(u32 us_count)
971 SDL_Delay(us_count / 1000);
974 void get_ticks_us(u64 *ticks_return)
976 struct timeval current_time;
977 gettimeofday(¤t_time, NULL);
980 (u64)current_time.tv_sec * 1000000 + current_time.tv_usec;
987 void change_ext(const char *src, char *buffer, const char *extension)
991 dot_position = strrchr(buffer, '.');
994 strcpy(dot_position, extension);
997 // make path: <main_path>/<romname>.<ext>
998 void make_rpath(char *buff, size_t size, const char *ext)
1001 p = strrchr(gamepak_filename, PATH_SEPARATOR_CHAR);
1003 p = gamepak_filename;
1005 snprintf(buff, size, "%s/%s", main_path, p);
1006 p = strrchr(buff, '.');
1011 #define main_savestate_builder(type) \
1012 void main_##type##_savestate(file_tag_type savestate_file) \
1014 file_##type##_variable(savestate_file, cpu_ticks); \
1015 file_##type##_variable(savestate_file, execute_cycles); \
1016 file_##type##_variable(savestate_file, video_count); \
1017 file_##type##_array(savestate_file, timer); \
1020 main_savestate_builder(read);
1021 main_savestate_builder(write_mem);
1024 void printout(void *str, u32 val)
1029 void set_clock_speed()
1031 static u32 clock_speed_old = default_clock_speed;
1032 if (clock_speed != clock_speed_old)
1034 printf("about to set CPU clock to %iMHz\n", clock_speed);
1036 scePowerSetClockFrequency(clock_speed, clock_speed, clock_speed / 2);
1037 #elif defined(GP2X_BUILD)
1038 set_FCLK(clock_speed);
1040 clock_speed_old = clock_speed;