| 1 | /* gameplaySP |
| 2 | * |
| 3 | * Copyright (C) 2006 Exophase <exophase@gmail.com> |
| 4 | * |
| 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. |
| 9 | * |
| 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. |
| 14 | * |
| 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 |
| 18 | */ |
| 19 | |
| 20 | #ifndef MAIN_H |
| 21 | #define MAIN_H |
| 22 | |
| 23 | typedef enum |
| 24 | { |
| 25 | TIMER_INACTIVE, |
| 26 | TIMER_PRESCALE, |
| 27 | TIMER_CASCADE |
| 28 | } timer_status_type; |
| 29 | |
| 30 | typedef enum |
| 31 | { |
| 32 | TIMER_NO_IRQ, |
| 33 | TIMER_TRIGGER_IRQ |
| 34 | } timer_irq_type; |
| 35 | |
| 36 | |
| 37 | typedef enum |
| 38 | { |
| 39 | TIMER_DS_CHANNEL_NONE, |
| 40 | TIMER_DS_CHANNEL_A, |
| 41 | TIMER_DS_CHANNEL_B, |
| 42 | TIMER_DS_CHANNEL_BOTH |
| 43 | } timer_ds_channel_type; |
| 44 | |
| 45 | typedef struct |
| 46 | { |
| 47 | s32 count; |
| 48 | u32 reload; |
| 49 | u32 prescale; |
| 50 | u32 stop_cpu_ticks; |
| 51 | fixed16_16 frequency_step; |
| 52 | timer_ds_channel_type direct_sound_channels; |
| 53 | timer_irq_type irq; |
| 54 | timer_status_type status; |
| 55 | } timer_type; |
| 56 | |
| 57 | typedef enum |
| 58 | { |
| 59 | auto_frameskip, |
| 60 | manual_frameskip, |
| 61 | no_frameskip |
| 62 | } frameskip_type; |
| 63 | |
| 64 | extern u32 cpu_ticks; |
| 65 | extern u32 frame_ticks; |
| 66 | extern u32 execute_cycles; |
| 67 | extern frameskip_type current_frameskip_type; |
| 68 | extern u32 frameskip_value; |
| 69 | extern u32 random_skip; |
| 70 | extern u32 global_cycles_per_instruction; |
| 71 | extern u32 synchronize_flag; |
| 72 | extern u32 skip_next_frame; |
| 73 | |
| 74 | extern timer_type timer[4]; |
| 75 | static u32 prescale_table[] = { 0, 6, 8, 10 }; |
| 76 | |
| 77 | extern u32 cycle_memory_access; |
| 78 | extern u32 cycle_pc_relative_access; |
| 79 | extern u32 cycle_sp_relative_access; |
| 80 | extern u32 cycle_block_memory_access; |
| 81 | extern u32 cycle_block_memory_sp_access; |
| 82 | extern u32 cycle_block_memory_words; |
| 83 | extern u32 cycle_dma16_words; |
| 84 | extern u32 cycle_dma32_words; |
| 85 | extern u32 flush_ram_count; |
| 86 | |
| 87 | extern u64 base_timestamp; |
| 88 | |
| 89 | extern u8 main_path[512]; |
| 90 | |
| 91 | extern u32 update_backup_flag; |
| 92 | extern u32 clock_speed; |
| 93 | |
| 94 | u32 update_gba(); |
| 95 | void reset_gba(); |
| 96 | void synchronize(); |
| 97 | void quit(); |
| 98 | void delay_us(u32 us_count); |
| 99 | void get_ticks_us(u64 *tick_return); |
| 100 | void game_name_ext(u8 *src, u8 *buffer, u8 *extension); |
| 101 | void main_write_mem_savestate(file_tag_type savestate_file); |
| 102 | void main_read_savestate(file_tag_type savestate_file); |
| 103 | |
| 104 | |
| 105 | #ifdef PSP_BUILD |
| 106 | |
| 107 | u32 file_length(u8 *filename, s32 dummy); |
| 108 | |
| 109 | extern u32 real_frame_count; |
| 110 | extern u32 virtual_frame_count; |
| 111 | extern u32 max_frameskip; |
| 112 | extern u32 num_skipped_frames; |
| 113 | |
| 114 | #endif |
| 115 | |
| 116 | |
| 117 | #ifdef GP2X_BUILD |
| 118 | |
| 119 | extern u64 frame_count_initial_timestamp; |
| 120 | extern u32 real_frame_count; |
| 121 | extern u32 virtual_frame_count; |
| 122 | extern u32 max_frameskip; |
| 123 | extern u32 num_skipped_frames; |
| 124 | |
| 125 | #endif |
| 126 | |
| 127 | |
| 128 | #ifdef PC_BUILD |
| 129 | |
| 130 | u32 file_length(u8 *dummy, FILE *fp); |
| 131 | |
| 132 | #endif |
| 133 | |
| 134 | #define count_timer(timer_number) \ |
| 135 | timer[timer_number].reload = 0x10000 - value; \ |
| 136 | if(timer_number < 2) \ |
| 137 | { \ |
| 138 | u32 timer_reload = \ |
| 139 | timer[timer_number].reload << timer[timer_number].prescale; \ |
| 140 | sound_update_frequency_step(timer_number); \ |
| 141 | } \ |
| 142 | |
| 143 | #define adjust_sound_buffer(timer_number, channel) \ |
| 144 | if(timer[timer_number].direct_sound_channels & (0x01 << channel)) \ |
| 145 | { \ |
| 146 | direct_sound_channel[channel].buffer_index = \ |
| 147 | (direct_sound_channel[channel].buffer_index + buffer_adjust) % \ |
| 148 | BUFFER_SIZE; \ |
| 149 | } \ |
| 150 | |
| 151 | #define trigger_timer(timer_number) \ |
| 152 | if(value & 0x80) \ |
| 153 | { \ |
| 154 | if(timer[timer_number].status == TIMER_INACTIVE) \ |
| 155 | { \ |
| 156 | u32 prescale = prescale_table[value & 0x03]; \ |
| 157 | u32 timer_reload = timer[timer_number].reload; \ |
| 158 | \ |
| 159 | if((value >> 2) & 0x01) \ |
| 160 | timer[timer_number].status = TIMER_CASCADE; \ |
| 161 | else \ |
| 162 | timer[timer_number].status = TIMER_PRESCALE; \ |
| 163 | \ |
| 164 | timer[timer_number].prescale = prescale; \ |
| 165 | timer[timer_number].irq = (value >> 6) & 0x01; \ |
| 166 | \ |
| 167 | address16(io_registers, 0x100 + (timer_number * 4)) = \ |
| 168 | -timer_reload; \ |
| 169 | \ |
| 170 | timer_reload <<= prescale; \ |
| 171 | timer[timer_number].count = timer_reload; \ |
| 172 | \ |
| 173 | if(timer_reload < execute_cycles) \ |
| 174 | execute_cycles = timer_reload; \ |
| 175 | \ |
| 176 | if(timer_number < 2) \ |
| 177 | { \ |
| 178 | u32 buffer_adjust = \ |
| 179 | (u32)(((float)(cpu_ticks - timer[timer_number].stop_cpu_ticks) * \ |
| 180 | sound_frequency) / 16777216.0) * 2; \ |
| 181 | \ |
| 182 | sound_update_frequency_step(timer_number); \ |
| 183 | adjust_sound_buffer(timer_number, 0); \ |
| 184 | adjust_sound_buffer(timer_number, 1); \ |
| 185 | } \ |
| 186 | } \ |
| 187 | } \ |
| 188 | else \ |
| 189 | { \ |
| 190 | if(timer[timer_number].status != TIMER_INACTIVE) \ |
| 191 | { \ |
| 192 | timer[timer_number].status = TIMER_INACTIVE; \ |
| 193 | timer[timer_number].stop_cpu_ticks = cpu_ticks; \ |
| 194 | } \ |
| 195 | } \ |
| 196 | address16(io_registers, 0x102 + (timer_number * 4)) = value; \ |
| 197 | |
| 198 | void change_ext(u8 *src, u8 *buffer, u8 *extension); |
| 199 | |
| 200 | #endif |
| 201 | |
| 202 | |