326 lines
7.5 KiB
C
326 lines
7.5 KiB
C
/* gameplaySP
|
|
*
|
|
* Copyright (C) 2006 Exophase <exophase@gmail.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "common.h"
|
|
#include <ctype.h>
|
|
|
|
timer_type timer[4];
|
|
|
|
u32 global_cycles_per_instruction = 1;
|
|
|
|
u32 cpu_ticks = 0;
|
|
|
|
u32 execute_cycles = 960;
|
|
s32 video_count = 960;
|
|
u32 ticks;
|
|
|
|
u32 arm_frame = 0;
|
|
u32 thumb_frame = 0;
|
|
u32 last_frame = 0;
|
|
|
|
u32 cycle_memory_access = 0;
|
|
u32 cycle_pc_relative_access = 0;
|
|
u32 cycle_sp_relative_access = 0;
|
|
u32 cycle_block_memory_access = 0;
|
|
u32 cycle_block_memory_sp_access = 0;
|
|
u32 cycle_block_memory_words = 0;
|
|
u32 cycle_dma16_words = 0;
|
|
u32 cycle_dma32_words = 0;
|
|
u32 flush_ram_count = 0;
|
|
u32 gbc_update_count = 0;
|
|
u32 oam_update_count = 0;
|
|
|
|
char main_path[512];
|
|
char save_path[512];
|
|
|
|
void trigger_ext_event(void);
|
|
|
|
static void update_timers(irq_type *irq_raised)
|
|
{
|
|
unsigned i;
|
|
for (i = 0; i < 4; i++)
|
|
{
|
|
if(timer[i].status == TIMER_INACTIVE)
|
|
continue;
|
|
|
|
if(timer[i].status != TIMER_CASCADE)
|
|
{
|
|
timer[i].count -= execute_cycles;
|
|
/* io_registers accessors range: REG_TM0D, REG_TM1D, REG_TM2D, REG_TM3D */
|
|
io_registers[128 + (i * 2)] = -(timer[i].count > timer[i].prescale);
|
|
}
|
|
|
|
if(timer[i].count > 0)
|
|
continue;
|
|
|
|
/* irq_raised value range: IRQ_TIMER0, IRQ_TIMER1, IRQ_TIMER2, IRQ_TIMER3 */
|
|
if(timer[i].irq == TIMER_TRIGGER_IRQ)
|
|
*irq_raised |= (8 << i);
|
|
|
|
if((i != 3) && (timer[i + 1].status == TIMER_CASCADE))
|
|
{
|
|
timer[i + 1].count--;
|
|
io_registers[REG_TM0D + (i + 1) * 2] = -(timer[i + 1].count);
|
|
}
|
|
|
|
if(i < 2)
|
|
{
|
|
if(timer[i].direct_sound_channels & 0x01)
|
|
sound_timer(timer[i].frequency_step, 0);
|
|
|
|
if(timer[i].direct_sound_channels & 0x02)
|
|
sound_timer(timer[i].frequency_step, 1);
|
|
}
|
|
|
|
timer[i].count += (timer[i].reload << timer[i].prescale);
|
|
}
|
|
}
|
|
|
|
void init_main(void)
|
|
{
|
|
u32 i;
|
|
|
|
for(i = 0; i < 4; i++)
|
|
{
|
|
dma[i].start_type = DMA_INACTIVE;
|
|
dma[i].direct_sound_channel = DMA_NO_DIRECT_SOUND;
|
|
timer[i].status = TIMER_INACTIVE;
|
|
timer[i].reload = 0x10000;
|
|
timer[i].stop_cpu_ticks = 0;
|
|
}
|
|
|
|
timer[0].direct_sound_channels = TIMER_DS_CHANNEL_BOTH;
|
|
timer[1].direct_sound_channels = TIMER_DS_CHANNEL_NONE;
|
|
|
|
cpu_ticks = 0;
|
|
|
|
execute_cycles = 960;
|
|
video_count = 960;
|
|
|
|
#ifdef HAVE_DYNAREC
|
|
flush_translation_cache_rom();
|
|
flush_translation_cache_ram();
|
|
flush_translation_cache_bios();
|
|
#endif
|
|
}
|
|
|
|
u32 no_alpha = 0;
|
|
|
|
u32 update_gba(void)
|
|
{
|
|
irq_type irq_raised = IRQ_NONE;
|
|
|
|
do
|
|
{
|
|
unsigned i;
|
|
cpu_ticks += execute_cycles;
|
|
|
|
reg[CHANGED_PC_STATUS] = 0;
|
|
|
|
if(gbc_sound_update)
|
|
{
|
|
gbc_update_count++;
|
|
update_gbc_sound(cpu_ticks);
|
|
gbc_sound_update = 0;
|
|
}
|
|
|
|
update_timers(&irq_raised);
|
|
|
|
video_count -= execute_cycles;
|
|
|
|
if(video_count <= 0)
|
|
{
|
|
u32 vcount = io_registers[REG_VCOUNT];
|
|
u32 dispstat = io_registers[REG_DISPSTAT];
|
|
|
|
if((dispstat & 0x02) == 0)
|
|
{
|
|
// Transition from hrefresh to hblank
|
|
video_count += (272);
|
|
dispstat |= 0x02;
|
|
|
|
if((dispstat & 0x01) == 0)
|
|
{
|
|
u32 i;
|
|
if(oam_update)
|
|
oam_update_count++;
|
|
|
|
if(no_alpha)
|
|
io_registers[REG_BLDCNT] = 0;
|
|
update_scanline();
|
|
|
|
// If in visible area also fire HDMA
|
|
for(i = 0; i < 4; i++)
|
|
{
|
|
if(dma[i].start_type == DMA_START_HBLANK)
|
|
dma_transfer(dma + i);
|
|
}
|
|
}
|
|
|
|
if(dispstat & 0x10)
|
|
irq_raised |= IRQ_HBLANK;
|
|
}
|
|
else
|
|
{
|
|
// Transition from hblank to next line
|
|
video_count += 960;
|
|
dispstat &= ~0x02;
|
|
|
|
vcount++;
|
|
|
|
if(vcount == 160)
|
|
{
|
|
// Transition from vrefresh to vblank
|
|
u32 i;
|
|
|
|
dispstat |= 0x01;
|
|
if(dispstat & 0x8)
|
|
{
|
|
irq_raised |= IRQ_VBLANK;
|
|
}
|
|
|
|
affine_reference_x[0] =
|
|
(s32)(address32(io_registers, 0x28) << 4) >> 4;
|
|
affine_reference_y[0] =
|
|
(s32)(address32(io_registers, 0x2C) << 4) >> 4;
|
|
affine_reference_x[1] =
|
|
(s32)(address32(io_registers, 0x38) << 4) >> 4;
|
|
affine_reference_y[1] =
|
|
(s32)(address32(io_registers, 0x3C) << 4) >> 4;
|
|
|
|
for(i = 0; i < 4; i++)
|
|
{
|
|
if(dma[i].start_type == DMA_START_VBLANK)
|
|
dma_transfer(dma + i);
|
|
}
|
|
}
|
|
else
|
|
|
|
if(vcount == 228)
|
|
{
|
|
// Transition from vblank to next screen
|
|
dispstat &= ~0x01;
|
|
|
|
/* printf("frame update (%x), %d instructions total, %d RAM flushes\n",
|
|
reg[REG_PC], instruction_count - last_frame, flush_ram_count);
|
|
last_frame = instruction_count;
|
|
*/
|
|
/* printf("%d gbc audio updates\n", gbc_update_count);
|
|
printf("%d oam updates\n", oam_update_count); */
|
|
gbc_update_count = 0;
|
|
oam_update_count = 0;
|
|
flush_ram_count = 0;
|
|
|
|
switch_to_main_thread();
|
|
|
|
update_gbc_sound(cpu_ticks);
|
|
gbc_sound_update = 0;
|
|
|
|
process_cheats();
|
|
|
|
vcount = 0;
|
|
}
|
|
|
|
if(vcount == (dispstat >> 8))
|
|
{
|
|
// vcount trigger
|
|
dispstat |= 0x04;
|
|
if(dispstat & 0x20)
|
|
{
|
|
irq_raised |= IRQ_VCOUNT;
|
|
}
|
|
}
|
|
else
|
|
dispstat &= ~0x04;
|
|
|
|
io_registers[REG_VCOUNT] = vcount;
|
|
}
|
|
io_registers[REG_DISPSTAT] = dispstat;
|
|
}
|
|
|
|
if(irq_raised)
|
|
raise_interrupt(irq_raised);
|
|
|
|
execute_cycles = video_count;
|
|
|
|
for (i = 0; i < 4; i++)
|
|
{
|
|
if(timer[i].status != TIMER_PRESCALE)
|
|
continue;
|
|
|
|
if(timer[i].count < execute_cycles)
|
|
execute_cycles = timer[i].count;
|
|
}
|
|
} while(reg[CPU_HALT_STATE] != CPU_ACTIVE);
|
|
|
|
return execute_cycles;
|
|
}
|
|
|
|
void reset_gba(void)
|
|
{
|
|
init_main();
|
|
init_memory();
|
|
init_cpu();
|
|
reset_sound();
|
|
}
|
|
|
|
u32 file_length(const char *dummy, FILE *fp)
|
|
{
|
|
#ifdef PSP_BUILD
|
|
SceIoStat stats;
|
|
sceIoGetstat(filename, &stats);
|
|
return stats.st_size;
|
|
#else
|
|
u32 length;
|
|
|
|
fseek(fp, 0, SEEK_END);
|
|
length = ftell(fp);
|
|
fseek(fp, 0, SEEK_SET);
|
|
|
|
return length;
|
|
#endif
|
|
}
|
|
|
|
void change_ext(const char *src, char *buffer, const char *extension)
|
|
{
|
|
char *dot_position;
|
|
strcpy(buffer, src);
|
|
dot_position = strrchr(buffer, '.');
|
|
|
|
if(dot_position)
|
|
strcpy(dot_position, extension);
|
|
}
|
|
|
|
#define main_savestate_builder(type) \
|
|
void main_##type##_savestate(void) \
|
|
{ \
|
|
state_mem_##type##_variable(cpu_ticks); \
|
|
state_mem_##type##_variable(execute_cycles); \
|
|
state_mem_##type##_variable(video_count); \
|
|
state_mem_##type##_array(timer); \
|
|
}
|
|
|
|
main_savestate_builder(read)
|
|
main_savestate_builder(write)
|
|
|
|
|
|
void printout(void *str, u32 val)
|
|
{
|
|
printf(str, val);
|
|
}
|