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gpsp/gba_memory.h
David Guillen Fandos 84cd7b2934 Rewrite ROM buffer allocation 
This improves the existing on-demand ROM paging and also breaks down ROM
buffers into 1MB blocks for platforms with memory fragmentation issues.

Fixed some potential RTC reg issue in said platforms too.
Fixed page pinning on interpreter (would crash due to LRU evictions).
2021-07-14 01:20:30 +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;
typedef enum
{
DMA_START_IMMEDIATELY = 0,
DMA_START_VBLANK = 1,
DMA_START_HBLANK = 2,
DMA_START_SPECIAL = 3,
DMA_INACTIVE = 4
} dma_start_type;
typedef enum
{
DMA_16BIT = 0,
DMA_32BIT = 1
} dma_length_type;
typedef enum
{
DMA_NO_REPEAT = 0,
DMA_REPEAT = 1
} dma_repeat_type;
typedef enum
{
DMA_INCREMENT = 0,
DMA_DECREMENT = 1,
DMA_FIXED = 2,
DMA_RELOAD = 3
} dma_increment_type;
typedef enum
{
DMA_NO_IRQ = 0,
DMA_TRIGGER_IRQ = 1
} dma_irq_type;
typedef enum
{
DMA_DIRECT_SOUND_A,
DMA_DIRECT_SOUND_B,
DMA_NO_DIRECT_SOUND
} dma_ds_type;
typedef struct
{
u32 dma_channel;
u32 source_address;
u32 dest_address;
u32 length;
dma_repeat_type repeat_type;
dma_ds_type direct_sound_channel;
dma_increment_type source_direction;
dma_increment_type dest_direction;
dma_length_type length_type;
dma_start_type start_type;
dma_irq_type irq;
} dma_transfer_type;
typedef enum
{
REG_DISPCNT = 0x000,
REG_DISPSTAT = 0x002,
REG_VCOUNT = 0x003,
REG_BG0CNT = 0x004,
REG_BG1CNT = 0x005,
REG_BG2CNT = 0x006,
REG_BG3CNT = 0x007,
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,
REG_SOUND1CNT_L = 0x30,
REG_SOUND1CNT_H = 0x31,
REG_SOUND3CNT_L = 0x38,
REG_SOUND3CNT_H = 0x39,
REG_SOUND3CNT_X = 0x3A,
REG_SOUND4CNT_H = 0x3E,
REG_SOUNDCNT_L = 0x40,
REG_SOUNDCNT_H = 0x41,
REG_SOUNDCNT_X = 0x42,
REG_DMA0SAD = 0x58,
REG_DMA0DAD = 0x5A,
REG_DMA0CNT_L = 0x5C,
REG_DMA0CNT_H = 0x5D,
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_IME = 0x104,
REG_HALTCNT = 0x180
} hardware_register;
typedef enum
{
FLASH_DEVICE_UNDEFINED = 0x00,
FLASH_DEVICE_MACRONIX_64KB = 0x1C,
FLASH_DEVICE_AMTEL_64KB = 0x3D,
FLASH_DEVICE_SST_64K = 0xD4,
FLASH_DEVICE_PANASONIC_64KB = 0x1B,
FLASH_DEVICE_MACRONIX_128KB = 0x09
} flash_device_id_type;
typedef enum
{
FLASH_MANUFACTURER_MACRONIX = 0xC2,
FLASH_MANUFACTURER_AMTEL = 0x1F,
FLASH_MANUFACTURER_PANASONIC = 0x32,
FLASH_MANUFACTURER_SST = 0xBF
} flash_manufacturer_id_type;
u8 function_cc read_memory8(u32 address);
u32 read_memory8s(u32 address);
u32 function_cc read_memory16(u32 address);
u16 function_cc read_memory16_signed(u32 address);
u32 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 u32 waitstate_cycles_sequential[16][3];
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(dma_transfer_type *dma);
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);
void memory_term(void);
u8 *load_gamepak_page(u32 physical_index);
extern u32 oam_update;
extern u32 gbc_sound_update;
extern u32 gbc_sound_wave_update;
extern dma_transfer_type dma[4];
extern u8 open_gba_bios_rom[1024*16];
extern u32 bios_read_protect;
extern u16 palette_ram[512];
extern u16 oam_ram[512];
extern u16 palette_ram_converted[512];
extern u16 io_registers[1024 * 16];
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];
extern flash_device_id_type flash_device_id;
extern const u8 *state_mem_read_ptr;
extern u8 *state_mem_write_ptr;
typedef enum
{
BACKUP_SRAM,
BACKUP_FLASH,
BACKUP_EEPROM,
BACKUP_NONE
} backup_type_type;
typedef enum
{
SRAM_SIZE_32KB,
SRAM_SIZE_64KB
} sram_size_type;
typedef enum
{
FLASH_BASE_MODE,
FLASH_ERASE_MODE,
FLASH_ID_MODE,
FLASH_WRITE_MODE,
FLASH_BANKSWITCH_MODE
} flash_mode_type;
typedef enum
{
FLASH_SIZE_64KB,
FLASH_SIZE_128KB
} flash_size_type;
extern backup_type_type backup_type;
extern sram_size_type sram_size;
extern flash_size_type flash_size;
typedef enum
{
EEPROM_512_BYTE,
EEPROM_8_KBYTE
} eeprom_size_type;
typedef enum
{
EEPROM_BASE_MODE,
EEPROM_READ_MODE,
EEPROM_READ_HEADER_MODE,
EEPROM_ADDRESS_MODE,
EEPROM_WRITE_MODE,
EEPROM_WRITE_ADDRESS_MODE,
EEPROM_ADDRESS_FOOTER_MODE,
EEPROM_WRITE_FOOTER_MODE
} eeprom_mode_type;
extern eeprom_size_type eeprom_size;
extern u8 gamepak_backup[1024 * 128];
static inline void state_mem_write(const void* src, size_t size)
{
memcpy(state_mem_write_ptr, src, size);
state_mem_write_ptr += size;
}
// 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));
}
/* this is an upper limit, ToDo : calculate the exact state size */
#define GBA_STATE_MEM_SIZE (512*1024)
#define state_mem_write_array(array) state_mem_write(array, sizeof(array))
#define state_mem_write_variable(variable) state_mem_write(&variable, sizeof(variable))
static inline void state_mem_read(void* dst, size_t size)
{
memcpy(dst, state_mem_read_ptr, size);
state_mem_read_ptr += size;
}
#define state_mem_read_array(array) state_mem_read(array, sizeof(array))
#define state_mem_read_variable(variable) state_mem_read(&variable, sizeof(variable))
void memory_write_savestate(void);
void memory_read_savestate(void);
void gba_load_state(const void *src);
void gba_save_state(void *dst);
#endif
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