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gpsp/gba_memory.h
David Guillen Fandos 11f56eb1d1 Implement text background affine rendering
2023-07-20 23:28:25 +02:00

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/* 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
*/
#ifndef MEMORY_H
#define MEMORY_H
#include "libretro.h"
extern int use_libretro_save_method;
#define DMA_CHAN_CNT 4
#define DMA_START_IMMEDIATELY 0
#define DMA_START_VBLANK 1
#define DMA_START_HBLANK 2
#define DMA_START_SPECIAL 3
#define DMA_INACTIVE 4
#define DMA_16BIT 0
#define DMA_32BIT 1
#define DMA_NO_REPEAT 0
#define DMA_REPEAT 1
#define DMA_INCREMENT 0
#define DMA_DECREMENT 1
#define DMA_FIXED 2
#define DMA_RELOAD 3
#define DMA_NO_IRQ 0
#define DMA_TRIGGER_IRQ 1
#define DMA_DIRECT_SOUND_A 0
#define DMA_DIRECT_SOUND_B 1
#define DMA_NO_DIRECT_SOUND 2
// Access to timer registers
#define REG_TMXD(n) (REG_TM0D + (2 * (n)))
#define REG_TMXCNT(n) (REG_TM0CNT + (2 * (n)))
typedef struct
{
u32 source_address;
u32 dest_address;
u32 length;
u32 repeat_type;
u32 direct_sound_channel;
u32 source_direction;
u32 dest_direction;
u32 length_type;
u32 start_type;
u32 irq;
} dma_transfer_type;
typedef enum
{
REG_DISPCNT = 0x00,
REG_DISPSTAT = 0x02,
REG_VCOUNT = 0x03,
REG_BG0CNT = 0x04,
REG_BG1CNT = 0x05,
REG_BG2CNT = 0x06,
REG_BG3CNT = 0x07,
REG_BG0HOFS = 0x08,
REG_BG0VOFS = 0x09,
REG_BG1HOFS = 0x0A,
REG_BG1VOFS = 0x0B,
REG_BG2HOFS = 0x0C,
REG_BG2VOFS = 0x0D,
REG_BG3HOFS = 0x0E,
REG_BG3VOFS = 0x0F,
REG_BG2PA = 0x10,
REG_BG2PB = 0x11,
REG_BG2PC = 0x12,
REG_BG2PD = 0x13,
REG_BG2X_L = 0x14,
REG_BG2X_H = 0x15,
REG_BG2Y_L = 0x16,
REG_BG2Y_H = 0x17,
REG_BG3PA = 0x18,
REG_BG3PB = 0x19,
REG_BG3PC = 0x1A,
REG_BG3PD = 0x1B,
REG_BG3X_L = 0x1C,
REG_BG3X_H = 0x1D,
REG_BG3Y_L = 0x1E,
REG_BG3Y_H = 0x1F,
REG_WIN0H = 0x20,
REG_WIN1H = 0x21,
REG_WIN0V = 0x22,
REG_WIN1V = 0x23,
REG_WININ = 0x24,
REG_WINOUT = 0x25,
REG_BLDCNT = 0x28,
REG_BLDALPHA = 0x29,
REG_BLDY = 0x2A,
// Sound control registers
REG_SOUND1CNT_L = 0x30,
REG_SOUND1CNT_H = 0x31,
REG_SOUND1CNT_X = 0x32,
REG_SOUND2CNT_L = 0x34,
REG_SOUND2CNT_H = 0x36,
REG_SOUND3CNT_L = 0x38,
REG_SOUND3CNT_H = 0x39,
REG_SOUND3CNT_X = 0x3A,
REG_SOUND4CNT_L = 0x3C,
REG_SOUND4CNT_H = 0x3E,
REG_SOUNDCNT_L = 0x40,
REG_SOUNDCNT_H = 0x41,
REG_SOUNDCNT_X = 0x42,
REG_SOUNDWAVE_0 = 0x48,
REG_SOUNDWAVE_1 = 0x49,
REG_SOUNDWAVE_2 = 0x4A,
REG_SOUNDWAVE_3 = 0x4B,
REG_SOUNDWAVE_4 = 0x4C,
REG_SOUNDWAVE_5 = 0x4D,
REG_SOUNDWAVE_6 = 0x4E,
REG_SOUNDWAVE_7 = 0x4F,
REG_SOUND_FIFOA_L = 0x50,
REG_SOUND_FIFOA_H = 0x51,
REG_SOUND_FIFOB_L = 0x52,
REG_SOUND_FIFOB_H = 0x53,
// DMA control
REG_DMA0SAD = 0x58,
REG_DMA0DAD = 0x5A,
REG_DMA0CNT_L = 0x5C,
REG_DMA0CNT_H = 0x5D,
REG_DMA1SAD = 0x5E,
REG_DMA1DAD = 0x60,
REG_DMA1CNT_L = 0x62,
REG_DMA1CNT_H = 0x63,
REG_DMA2SAD = 0x64,
REG_DMA2DAD = 0x66,
REG_DMA2CNT_L = 0x68,
REG_DMA2CNT_H = 0x69,
REG_DMA3SAD = 0x6A,
REG_DMA3DAD = 0x6C,
REG_DMA3CNT_L = 0x6E,
REG_DMA3CNT_H = 0x6F,
// Timers
REG_TM0D = 0x80,
REG_TM0CNT = 0x81,
REG_TM1D = 0x82,
REG_TM1CNT = 0x83,
REG_TM2D = 0x84,
REG_TM2CNT = 0x85,
REG_TM3D = 0x86,
REG_TM3CNT = 0x87,
REG_P1 = 0x098,
REG_P1CNT = 0x099,
REG_RCNT = 0x9A,
REG_IE = 0x100,
REG_IF = 0x101,
REG_WAITCNT = 0x102,
REG_IME = 0x104,
REG_HALTCNT = 0x180
} hardware_register;
// Some useful macros to avoid reg math
#define REG_BGxCNT(n) (REG_BG0CNT + (n))
#define REG_WINxH(n) (REG_WIN0H + (n))
#define REG_WINxV(n) (REG_WIN0V + (n))
#define REG_BGxHOFS(n) (REG_BG0HOFS + ((n) * 2))
#define REG_BGxVOFS(n) (REG_BG0VOFS + ((n) * 2))
#define REG_BGxPA(n) (REG_BG2PA + ((n)-2)*8)
#define REG_BGxPB(n) (REG_BG2PB + ((n)-2)*8)
#define REG_BGxPC(n) (REG_BG2PC + ((n)-2)*8)
#define REG_BGxPD(n) (REG_BG2PD + ((n)-2)*8)
#define FLASH_DEVICE_UNDEFINED 0x00
#define FLASH_DEVICE_MACRONIX_64KB 0x1C
#define FLASH_DEVICE_AMTEL_64KB 0x3D
#define FLASH_DEVICE_SST_64K 0xD4
#define FLASH_DEVICE_PANASONIC_64KB 0x1B
#define FLASH_DEVICE_MACRONIX_128KB 0x09
#define FLASH_MANUFACTURER_MACRONIX 0xC2
#define FLASH_MANUFACTURER_AMTEL 0x1F
#define FLASH_MANUFACTURER_PANASONIC 0x32
#define FLASH_MANUFACTURER_SST 0xBF
u32 function_cc read_memory8(u32 address);
u32 function_cc read_memory8s(u32 address);
u32 function_cc read_memory16(u32 address);
u16 function_cc read_memory16_signed(u32 address);
u32 function_cc read_memory16s(u32 address);
u32 function_cc read_memory32(u32 address);
cpu_alert_type function_cc write_memory8(u32 address, u8 value);
cpu_alert_type function_cc write_memory16(u32 address, u16 value);
cpu_alert_type function_cc write_memory32(u32 address, u32 value);
u32 function_cc read_eeprom(void);
void function_cc write_eeprom(u32 address, u32 value);
u8 read_backup(u32 address);
void function_cc write_backup(u32 address, u32 value);
void function_cc write_rtc(u32 address, u32 value);
/* EDIT: Shouldn't this be extern ?! */
extern const u32 def_seq_cycles[16][2];
/* Cycles can change depending on WAITCNT */
extern u8 ws_cyc_seq[16][2];
extern u8 ws_cyc_nseq[16][2];
extern u32 gamepak_size;
extern char gamepak_title[13];
extern char gamepak_code[5];
extern char gamepak_maker[3];
extern char gamepak_filename[512];
cpu_alert_type dma_transfer(unsigned dma_chan, int *cycles);
u8 *memory_region(u32 address, u32 *memory_limit);
u32 load_gamepak(const struct retro_game_info* info, const char *name);
u32 load_backup(char *name);
s32 load_bios(char *name);
void update_backup(void);
void init_memory(void);
void init_gamepak_buffer(void);
bool gamepak_must_swap(void);
void memory_term(void);
u8 *load_gamepak_page(u32 physical_index);
extern u32 oam_update;
extern u32 gbc_sound_wave_update;
extern dma_transfer_type dma[DMA_CHAN_CNT];
extern u8 open_gba_bios_rom[1024*16];
extern u16 palette_ram[512];
extern u16 oam_ram[512];
extern u16 palette_ram_converted[512];
extern u16 io_registers[512];
extern u8 vram[1024 * 96];
extern u8 bios_rom[1024 * 16];
// Double buffer used for SMC detection
extern u8 ewram[1024 * 256 * 2];
extern u8 iwram[1024 * 32 * 2];
extern u8 *memory_map_read[8 * 1024];
extern u32 reg[64];
#define BACKUP_SRAM 0
#define BACKUP_FLASH 1
#define BACKUP_EEPROM 2
#define BACKUP_NONE 3
#define SRAM_SIZE_32KB 1
#define SRAM_SIZE_64KB 2
#define FLASH_SIZE_64KB 1
#define FLASH_SIZE_128KB 2
#define EEPROM_512_BYTE 1
#define EEPROM_8_KBYTE 16
#define EEPROM_BASE_MODE 0
#define EEPROM_READ_MODE 1
#define EEPROM_READ_HEADER_MODE 2
#define EEPROM_ADDRESS_MODE 3
#define EEPROM_WRITE_MODE 4
#define EEPROM_WRITE_ADDRESS_MODE 5
#define EEPROM_ADDRESS_FOOTER_MODE 6
#define EEPROM_WRITE_FOOTER_MODE 7
#define FLASH_BASE_MODE 0
#define FLASH_ERASE_MODE 1
#define FLASH_ID_MODE 2
#define FLASH_WRITE_MODE 3
#define FLASH_BANKSWITCH_MODE 4
extern u32 backup_type;
extern u32 sram_bankcount;
extern u32 flash_bank_cnt;
extern u32 eeprom_size;
extern u8 gamepak_backup[1024 * 128];
// Page sticky bit routines
extern u32 gamepak_sticky_bit[1024/32];
static inline void touch_gamepak_page(u32 physical_index)
{
u32 idx = (physical_index >> 5) & 31;
u32 bof = physical_index & 31;
gamepak_sticky_bit[idx] |= (1 << bof);
}
static inline void clear_gamepak_stickybits(void)
{
memset(gamepak_sticky_bit, 0, sizeof(gamepak_sticky_bit));
}
unsigned memory_write_savestate(u8 *dst);
bool memory_read_savestate(const u8*src);
#endif
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