diff options
| -rw-r--r-- | data/save.s | 20 | ||||
| -rw-r--r-- | include/global.h | 3 | ||||
| -rw-r--r-- | ld_script.txt | 2 | ||||
| -rw-r--r-- | src/save.c | 56 |
4 files changed, 59 insertions, 22 deletions
diff --git a/data/save.s b/data/save.s deleted file mode 100644 index 23a8d3928..000000000 --- a/data/save.s +++ /dev/null @@ -1,20 +0,0 @@ - .include "asm/macros.inc" - .include "constants/constants.inc" - - .section .rodata - -gSaveSectionOffsets:: @ 85CDC00 - .2byte 0, 0xF2C - .2byte 0, 0xF80 - .2byte 0xF80, 0xF80 - .2byte 0x1F00, 0xF80 - .2byte 0x2E80, 0xF08 - .2byte 0, 0xF80 - .2byte 0xF80, 0xF80 - .2byte 0x1F00, 0xF80 - .2byte 0x2E80, 0xF80 - .2byte 0x3E00, 0xF80 - .2byte 0x4D80, 0xF80 - .2byte 0x5D00, 0xF80 - .2byte 0x6C80, 0xF80 - .2byte 0x7C00, 0x7D0 diff --git a/include/global.h b/include/global.h index 9f6c45df1..f358dafe7 100644 --- a/include/global.h +++ b/include/global.h @@ -37,6 +37,9 @@ #define POKEMON_NAME_LENGTH 10 #define OT_NAME_LENGTH 7 +#define min(a, b) ((a) < (b) ? (a) : (b)) +#define max(a, b) ((a) >= (b) ? (a) : (b)) + #define HEAP_SIZE 0x1C000 extern u8 gStringVar1[]; diff --git a/ld_script.txt b/ld_script.txt index 871729691..345afb27f 100644 --- a/ld_script.txt +++ b/ld_script.txt @@ -484,7 +484,7 @@ SECTIONS { src/battle_controller_link_partner.o(.rodata); src/battle_message.o(.rodata); data/cable_car.o(.rodata); - data/save.o(.rodata); + src/save.o(.rodata); data/field_effect_helpers.o(.rodata); data/contest_ai.o(.rodata); src/battle_controller_safari.o(.rodata); diff --git a/src/save.c b/src/save.c index 023ca6870..138ec7cce 100644 --- a/src/save.c +++ b/src/save.c @@ -4,13 +4,67 @@ #include "constants/game_stat.h" #include "task.h" +// for the chunk declarations +extern struct SaveBlock2 gSaveblock2; +extern struct SaveBlock1 gSaveblock1; +extern struct PokemonStorage gPokemonStorage; + extern struct SaveSectionLocation gRamSaveSectionLocations[0xE]; extern u8 gDecompressionBuffer[]; extern u32 gFlashMemoryPresent; extern u16 gUnknown_03006294; extern bool8 gSoftResetDisabled; -extern const struct SaveSectionOffsets gSaveSectionOffsets[0xE]; +// Divide save blocks into individual chunks to be written to flash sectors + +// Each 4 KiB flash sector contains 3968 bytes of actual data followed by a 128 byte footer +#define SECTOR_DATA_SIZE 3968 +#define SECTOR_FOOTER_SIZE 128 + +/* + * Sector Layout: + * + * Sectors 0 - 13: Save Slot 1 + * Sectors 14 - 27: Save Slot 2 + * Sectors 28 - 29: Hall of Fame + * Sectors 30 - 31: e-Reader battle tower data, maybe? (note: depreciated in Emerald US) + * + * There are two save slots for saving the player's game data. We alternate between + * them each time the game is saved, so that if the current save slot is corrupt, + * we can load the previous one. We also rotate the sectors in each save slot + * so that the same data is not always being written to the same sector. This + * might be done to reduce wear on the flash memory, but I'm not sure, since all + * 14 sectors get written anyway. + */ + +// (u8 *)structure was removed from the first statement of the macro in Emerald. +// This is because malloc is used to allocate addresses so storing the raw +// addresses should not be done in the offsets information. +#define SAVEBLOCK_CHUNK(structure, chunkNum) \ +{ \ + chunkNum * SECTOR_DATA_SIZE, \ + min(sizeof(structure) - chunkNum * SECTOR_DATA_SIZE, SECTOR_DATA_SIZE) \ +} \ + +const struct SaveSectionOffsets gSaveSectionOffsets[] = +{ + SAVEBLOCK_CHUNK(gSaveblock2, 0), + + SAVEBLOCK_CHUNK(gSaveblock1, 0), + SAVEBLOCK_CHUNK(gSaveblock1, 1), + SAVEBLOCK_CHUNK(gSaveblock1, 2), + SAVEBLOCK_CHUNK(gSaveblock1, 3), + + SAVEBLOCK_CHUNK(gPokemonStorage, 0), + SAVEBLOCK_CHUNK(gPokemonStorage, 1), + SAVEBLOCK_CHUNK(gPokemonStorage, 2), + SAVEBLOCK_CHUNK(gPokemonStorage, 3), + SAVEBLOCK_CHUNK(gPokemonStorage, 4), + SAVEBLOCK_CHUNK(gPokemonStorage, 5), + SAVEBLOCK_CHUNK(gPokemonStorage, 6), + SAVEBLOCK_CHUNK(gPokemonStorage, 7), + SAVEBLOCK_CHUNK(gPokemonStorage, 8), +}; extern void DoSaveFailedScreen(u8); // save_failed_screen extern void LoadSerializedGame(void); // load_save |