11ec213c99
This saves a few cycles in MIPS and simplifies a bit the core. Removed the write map, only affects interpreter performance very minimally. Rewired ARM and x86 handlers to support direct access to I/EWRAM (and VRAM on ARM) to compensate. Overall performance is slightly better but code is cleaner and allows for further improvements in the dynarecs.
307 lines
7 KiB
C
307 lines
7 KiB
C
/* gameplaySP
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*
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* Copyright (C) 2006 Exophase <exophase@gmail.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef MEMORY_H
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#define MEMORY_H
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#include "libretro.h"
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extern int use_libretro_save_method;
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typedef enum
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{
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DMA_START_IMMEDIATELY,
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DMA_START_VBLANK,
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DMA_START_HBLANK,
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DMA_START_SPECIAL,
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DMA_INACTIVE
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} dma_start_type;
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typedef enum
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{
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DMA_16BIT,
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DMA_32BIT
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} dma_length_type;
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typedef enum
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{
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DMA_NO_REPEAT,
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DMA_REPEAT
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} dma_repeat_type;
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typedef enum
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{
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DMA_INCREMENT,
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DMA_DECREMENT,
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DMA_FIXED,
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DMA_RELOAD
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} dma_increment_type;
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typedef enum
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{
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DMA_NO_IRQ,
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DMA_TRIGGER_IRQ
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} dma_irq_type;
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typedef enum
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{
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DMA_DIRECT_SOUND_A,
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DMA_DIRECT_SOUND_B,
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DMA_NO_DIRECT_SOUND
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} dma_ds_type;
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typedef struct
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{
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u32 dma_channel;
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u32 source_address;
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u32 dest_address;
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u32 length;
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dma_repeat_type repeat_type;
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dma_ds_type direct_sound_channel;
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dma_increment_type source_direction;
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dma_increment_type dest_direction;
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dma_length_type length_type;
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dma_start_type start_type;
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dma_irq_type irq;
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} dma_transfer_type;
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typedef enum
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{
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REG_DISPCNT = 0x000,
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REG_DISPSTAT = 0x002,
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REG_VCOUNT = 0x003,
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REG_BG0CNT = 0x004,
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REG_BG1CNT = 0x005,
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REG_BG2CNT = 0x006,
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REG_BG3CNT = 0x007,
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REG_BG0HOFS = 0x08,
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REG_BG0VOFS = 0x09,
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REG_BG1HOFS = 0x0A,
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REG_BG1VOFS = 0x0B,
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REG_BG2HOFS = 0x0C,
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REG_BG2VOFS = 0x0D,
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REG_BG3HOFS = 0x0E,
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REG_BG3VOFS = 0x0F,
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REG_BG2PA = 0x10,
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REG_BG2PB = 0x11,
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REG_BG2PC = 0x12,
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REG_BG2PD = 0x13,
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REG_BG2X_L = 0x14,
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REG_BG2X_H = 0x15,
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REG_BG2Y_L = 0x16,
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REG_BG2Y_H = 0x17,
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REG_BG3PA = 0x18,
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REG_BG3PB = 0x19,
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REG_BG3PC = 0x1A,
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REG_BG3PD = 0x1B,
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REG_BG3X_L = 0x1C,
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REG_BG3X_H = 0x1D,
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REG_BG3Y_L = 0x1E,
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REG_BG3Y_H = 0x1F,
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REG_WIN0H = 0x20,
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REG_WIN1H = 0x21,
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REG_WIN0V = 0x22,
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REG_WIN1V = 0x23,
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REG_WININ = 0x24,
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REG_WINOUT = 0x25,
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REG_BLDCNT = 0x28,
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REG_BLDALPHA = 0x29,
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REG_BLDY = 0x2A,
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REG_TM0D = 0x80,
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REG_TM0CNT = 0x81,
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REG_TM1D = 0x82,
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REG_TM1CNT = 0x83,
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REG_TM2D = 0x84,
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REG_TM2CNT = 0x85,
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REG_TM3D = 0x86,
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REG_TM3CNT = 0x87,
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REG_P1 = 0x098,
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REG_P1CNT = 0x099,
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REG_RCNT = 0x9A,
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REG_IE = 0x100,
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REG_IF = 0x101,
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REG_IME = 0x104,
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REG_HALTCNT = 0x180
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} hardware_register;
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typedef enum
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{
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FLASH_DEVICE_MACRONIX_64KB = 0x1C,
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FLASH_DEVICE_AMTEL_64KB = 0x3D,
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FLASH_DEVICE_SST_64K = 0xD4,
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FLASH_DEVICE_PANASONIC_64KB = 0x1B,
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FLASH_DEVICE_MACRONIX_128KB = 0x09
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} flash_device_id_type;
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typedef enum
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{
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FLASH_MANUFACTURER_MACRONIX = 0xC2,
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FLASH_MANUFACTURER_AMTEL = 0x1F,
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FLASH_MANUFACTURER_PANASONIC = 0x32,
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FLASH_MANUFACTURER_SST = 0xBF
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} flash_manufacturer_id_type;
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u8 function_cc read_memory8(u32 address);
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u32 read_memory8s(u32 address);
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u32 function_cc read_memory16(u32 address);
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u16 function_cc read_memory16_signed(u32 address);
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u32 read_memory16s(u32 address);
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u32 function_cc read_memory32(u32 address);
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cpu_alert_type function_cc write_memory8(u32 address, u8 value);
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cpu_alert_type function_cc write_memory16(u32 address, u16 value);
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cpu_alert_type function_cc write_memory32(u32 address, u32 value);
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u32 function_cc read_eeprom(void);
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void function_cc write_eeprom(u32 address, u32 value);
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u8 read_backup(u32 address);
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void function_cc write_backup(u32 address, u32 value);
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void function_cc write_rtc(u32 address, u32 value);
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extern u8 *memory_regions[16];
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extern u32 memory_limits[16];
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/* EDIT: Shouldn't this be extern ?! */
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extern u32 waitstate_cycles_sequential[16][3];
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extern u32 gamepak_size;
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extern char gamepak_title[13];
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extern char gamepak_code[5];
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extern char gamepak_maker[3];
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extern char gamepak_filename[512];
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cpu_alert_type dma_transfer(dma_transfer_type *dma);
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u8 *memory_region(u32 address, u32 *memory_limit);
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u32 load_gamepak(const struct retro_game_info* info, const char *name);
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u32 load_backup(char *name);
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s32 load_bios(char *name);
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void update_backup(void);
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void init_memory(void);
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void init_gamepak_buffer(void);
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void memory_term(void);
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u8 *load_gamepak_page(u32 physical_index);
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extern u8 *gamepak_rom;
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extern u32 gamepak_ram_buffer_size;
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extern u32 oam_update;
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extern u32 gbc_sound_update;
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extern u32 gbc_sound_wave_update;
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extern dma_transfer_type dma[4];
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extern u8 open_gba_bios_rom[1024*16];
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extern u32 bios_read_protect;
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extern u16 palette_ram[512];
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extern u16 oam_ram[512];
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extern u16 palette_ram_converted[512];
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extern u16 io_registers[1024 * 16];
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extern u8 vram[1024 * 96];
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extern u8 bios_rom[1024 * 16];
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// Double buffer used for SMC detection
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extern u8 ewram[1024 * 256 * 2];
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extern u8 iwram[1024 * 32 * 2];
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extern u8 *memory_map_read[8 * 1024];
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extern u32 reg[64];
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extern flash_device_id_type flash_device_id;
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extern const u8 *state_mem_read_ptr;
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extern u8 *state_mem_write_ptr;
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typedef enum
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{
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BACKUP_SRAM,
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BACKUP_FLASH,
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BACKUP_EEPROM,
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BACKUP_NONE
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} backup_type_type;
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typedef enum
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{
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SRAM_SIZE_32KB,
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SRAM_SIZE_64KB
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} sram_size_type;
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typedef enum
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{
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FLASH_BASE_MODE,
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FLASH_ERASE_MODE,
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FLASH_ID_MODE,
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FLASH_WRITE_MODE,
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FLASH_BANKSWITCH_MODE
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} flash_mode_type;
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typedef enum
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{
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FLASH_SIZE_64KB,
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FLASH_SIZE_128KB
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} flash_size_type;
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extern backup_type_type backup_type;
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extern sram_size_type sram_size;
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extern flash_size_type flash_size;
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typedef enum
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{
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EEPROM_512_BYTE,
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EEPROM_8_KBYTE
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} eeprom_size_type;
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typedef enum
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{
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EEPROM_BASE_MODE,
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EEPROM_READ_MODE,
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EEPROM_READ_HEADER_MODE,
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EEPROM_ADDRESS_MODE,
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EEPROM_WRITE_MODE,
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EEPROM_WRITE_ADDRESS_MODE,
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EEPROM_ADDRESS_FOOTER_MODE,
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EEPROM_WRITE_FOOTER_MODE
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} eeprom_mode_type;
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extern eeprom_size_type eeprom_size;
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extern u8 gamepak_backup[1024 * 128];
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static inline void state_mem_write(const void* src, size_t size)
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{
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memcpy(state_mem_write_ptr, src, size);
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state_mem_write_ptr += size;
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}
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/* this is an upper limit, ToDo : calculate the exact state size */
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#define GBA_STATE_MEM_SIZE (512*1024)
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#define state_mem_write_array(array) state_mem_write(array, sizeof(array))
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#define state_mem_write_variable(variable) state_mem_write(&variable, sizeof(variable))
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static inline void state_mem_read(void* dst, size_t size)
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{
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memcpy(dst, state_mem_read_ptr, size);
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state_mem_read_ptr += size;
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}
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#define state_mem_read_array(array) state_mem_read(array, sizeof(array))
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#define state_mem_read_variable(variable) state_mem_read(&variable, sizeof(variable))
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void memory_write_savestate(void);
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void memory_read_savestate(void);
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void gba_load_state(const void *src);
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void gba_save_state(void *dst);
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#endif
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