Port over berry fix program

1 files changed, 752 insertions, 0 deletions

diff --git a/berry_fix/payload/src/flash.c b/berry_fix/payload/src/flash.c
new file mode 100644
index 000000000..3a0369dda
--- /dev/null
+++ b/berry_fix/payload/src/flash.c
@@ -0,0 +1,752 @@
+#include <gba/gba.h>
+#include <agb_flash.h>
+#include "constants/vars.h"
+#include "global.h"
+#include "main.h"
+#include "flash.h"
+#include "rtc.h"
+
+struct SaveBlockChunk
+{
+    u8 * data;
+    u16 size;
+};
+
+u8 WriteSaveBlockChunks(u16 a0, const struct SaveBlockChunk * a1);
+u8 WriteSingleChunk(u16 a0, const struct SaveBlockChunk * a1);
+u8 TryWriteSector(u8, u8 *);
+u8 EraseCurrentChunk(u16 a0, const struct SaveBlockChunk * a1);
+u8 TryReadAllSaveSectorsCurrentSlot(u16 a0, const struct SaveBlockChunk * a1);
+u8 ReadAllSaveSectorsCurrentSlot(u16 a0, const struct SaveBlockChunk * a1);
+u8 GetSaveValidStatus(const struct SaveBlockChunk * a1);
+u32 DoReadFlashWholeSection(u8 a0, struct SaveSector * a1);
+u16 CalculateChecksum(const void *, u16);
+
+u16 gFirstSaveSector;
+u32 gPrevSaveCounter;
+u16 gLastKnownGoodSector;
+u32 gDamagedSaveSectors;
+u32 gSaveCounter;
+struct SaveSector * gFastSaveSection;
+u16 gCurSaveChunk;
+bool32 gFlashIdentIsValid;
+
+EWRAM_DATA struct SaveBlock2 gSaveBlock2 = {};
+EWRAM_DATA struct SaveBlock1 gSaveBlock1 = {};
+EWRAM_DATA struct PokemonStorage gPokemonStorage = {};
+
+// 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
+
+#define SAVEBLOCK_CHUNK(structure, chunkNum)                                \
+{                                                                           \
+    (u8 *)&structure + chunkNum * SECTOR_DATA_SIZE,                         \
+    min(sizeof(structure) - chunkNum * SECTOR_DATA_SIZE, SECTOR_DATA_SIZE)  \
+}                                                                           \
+
+static const struct SaveBlockChunk sSaveBlockChunks[] =
+{
+    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),
+};
+
+const u16 gInfoMessagesPal[] = INCBIN_U16("graphics/msg_box.gbapal");
+const u8 gInfoMessagesTilemap[] = INCBIN_U8("graphics/msg_box.tilemap.lz");
+const u8 gInfoMessagesGfx[] = INCBIN_U8("graphics/msg_box.4bpp.lz");
+
+bool32 flash_maincb_ident_is_valid(void)
+{
+    gFlashIdentIsValid = TRUE;
+    if (!IdentifyFlash())
+    {
+        SetFlashTimerIntr(0, &((IntrFunc *)gIntrFuncPointers)[9]);
+        return TRUE;
+    }
+    gFlashIdentIsValid = FALSE;
+    return FALSE;
+}
+
+void Call_ReadFlash(u16 sectorNum, ptrdiff_t offset, void * dest, size_t size)
+{
+    ReadFlash(sectorNum, offset, dest, size);
+}
+
+u8 Call_WriteSaveBlockChunks(u16 a0, const struct SaveBlockChunk * a1)
+{
+    return WriteSaveBlockChunks(a0, a1);
+}
+
+u8 Call_TryReadAllSaveSectorsCurrentSlot(u16 a0, const struct SaveBlockChunk * a1)
+{
+    return TryReadAllSaveSectorsCurrentSlot(a0, a1);
+}
+
+u32 * GetDamagedSaveSectorsPtr(void)
+{
+    return &gDamagedSaveSectors;
+}
+
+s32 flash_write_save_block_chunks(u8 a0)
+{
+    u8 i;
+
+    switch (a0)
+    {
+        case 0:
+        default:
+            Call_WriteSaveBlockChunks(0xFFFF, sSaveBlockChunks);
+            break;
+        case 1:
+            for (i = 0; i < 5; i++)
+            {
+                Call_WriteSaveBlockChunks(i, sSaveBlockChunks);
+            }
+            break;
+        case 2:
+            Call_WriteSaveBlockChunks(0, sSaveBlockChunks);
+            break;
+    }
+
+    return 0;
+}
+
+u8 flash_write_save_block_chunks_check_damage(u8 a0)
+{
+    flash_write_save_block_chunks(a0);
+    if (*GetDamagedSaveSectorsPtr() == 0)
+        return 1;
+    return 0xFF;
+}
+
+u8 flash_maincb_read_save(u32 unused)
+{
+    return Call_TryReadAllSaveSectorsCurrentSlot(0xFFFF, sSaveBlockChunks);
+}
+
+void msg_load_gfx(void)
+{
+    REG_DISPCNT = 0;
+    REG_BG0HOFS = 0;
+    REG_BG0VOFS = 0;
+    REG_BLDCNT = 0;
+    LZ77UnCompVram(gInfoMessagesGfx, (void *)BG_VRAM);
+    LZ77UnCompVram(gInfoMessagesTilemap, (void *)BG_SCREEN_ADDR(28));
+    CpuCopy16(gInfoMessagesPal, (void *)BG_PLTT, 0x200);
+    REG_BG0CNT = BGCNT_SCREENBASE(28) | BGCNT_TXT512x512;
+    REG_DISPCNT = DISPCNT_BG0_ON;
+}
+
+void msg_display(enum MsgBoxUpdateMessage a0)
+{
+    switch (a0)
+    {
+        case MSGBOX_WILL_NOW_UPDATE:
+            REG_BG0HOFS = 0;
+            REG_BG0VOFS = 0;
+            break;
+        case MSGBOX_HAS_BEEN_UPDATED:
+            REG_BG0HOFS = 0x100;
+            REG_BG0VOFS = 0;
+            break;
+        case MSGBOX_UNABLE_TO_UPDATE:
+            REG_BG0HOFS = 0x100;
+            REG_BG0VOFS = 0xB0;
+            break;
+        case MSGBOX_NO_NEED_TO_UPDATE:
+            REG_BG0HOFS = 0;
+            REG_BG0VOFS = 0xB0;
+            break;
+        case MSGBOX_UPDATING:
+            REG_BG0HOFS = 0;
+            REG_BG0VOFS = 0x160;
+            break;
+    }
+}
+
+void Save_EraseAllData(void)
+{
+    u16 i;
+    for (i = 0; i < 32; i++)
+        EraseFlashSector(i);
+}
+
+void Save_ResetSaveCounters(void)
+{
+    gSaveCounter = 0;
+    gFirstSaveSector = 0;
+    gDamagedSaveSectors = 0;
+}
+
+bool32 SetSectorDamagedStatus(u8 op, u8 sectorNum)
+{
+    bool32 retVal = FALSE;
+
+    switch (op)
+    {
+        case SECTOR_DAMAGED:
+            gDamagedSaveSectors |= (1 << sectorNum);
+            break;
+        case SECTOR_OK:
+            gDamagedSaveSectors &= ~(1 << sectorNum);
+            break;
+        case SECTOR_CHECK: // unused
+            if (gDamagedSaveSectors & (1 << sectorNum))
+                retVal = TRUE;
+            break;
+    }
+
+    return retVal;
+}
+
+u8 WriteSaveBlockChunks(u16 chunkId, const struct SaveBlockChunk *chunks)
+{
+    u32 retVal;
+    u16 i;
+
+    gFastSaveSection = eSaveSection;
+
+    if (chunkId != 0xFFFF)  // write single chunk
+    {
+        retVal = WriteSingleChunk(chunkId, chunks);
+    }
+    else  // write all chunks
+    {
+        gLastKnownGoodSector = gFirstSaveSector;
+        gPrevSaveCounter = gSaveCounter;
+        gFirstSaveSector++;
+        gFirstSaveSector %= NUM_SECTORS_PER_SAVE_SLOT;
+        gSaveCounter++;
+        retVal = SAVE_STATUS_OK;
+
+        for (i = 0; i < NUM_SECTORS_PER_SAVE_SLOT; i++)
+            WriteSingleChunk(i, chunks);
+
+        // Check for any bad sectors
+        if (gDamagedSaveSectors != 0) // skip the damaged sector.
+        {
+            retVal = SAVE_STATUS_ERROR;
+            gFirstSaveSector = gLastKnownGoodSector;
+            gSaveCounter = gPrevSaveCounter;
+        }
+    }
+
+    return retVal;
+}
+
+u8 WriteSingleChunk(u16 chunkId, const struct SaveBlockChunk * chunks)
+{
+    u16 i;
+    u16 sectorNum;
+    u8 *chunkData;
+    u16 chunkSize;
+
+    // select sector number
+    sectorNum = chunkId + gFirstSaveSector;
+    sectorNum %= NUM_SECTORS_PER_SAVE_SLOT;
+    // select save slot
+    sectorNum += NUM_SECTORS_PER_SAVE_SLOT * (gSaveCounter % 2);
+
+    chunkData = chunks[chunkId].data;
+    chunkSize = chunks[chunkId].size;
+
+    // clear save section.
+    for (i = 0; i < sizeof(struct SaveSector); i++)
+        ((u8 *)gFastSaveSection)[i] = 0;
+
+    gFastSaveSection->id = chunkId;
+    gFastSaveSection->signature = FILE_SIGNATURE;
+    gFastSaveSection->counter = gSaveCounter;
+    for (i = 0; i < chunkSize; i++)
+        gFastSaveSection->data[i] = chunkData[i];
+    gFastSaveSection->checksum = CalculateChecksum(chunkData, chunkSize);
+
+    return TryWriteSector(sectorNum, gFastSaveSection->data);
+}
+
+u8 HandleWriteSectorNBytes(u8 sectorNum, u8 *data, u16 size)
+{
+    u16 i;
+    struct SaveSector *section = eSaveSection;
+
+    for (i = 0; i < sizeof(struct SaveSector); i++)
+        ((char *)section)[i] = 0;
+
+    section->signature = FILE_SIGNATURE;
+    for (i = 0; i < size; i++)
+        section->data[i] = data[i];
+    section->id = CalculateChecksum(data, size); // though this appears to be incorrect, it might be some sector checksum instead of a whole save checksum and only appears to be relevent to HOF data, if used.
+
+    return TryWriteSector(sectorNum, section->data);
+}
+
+u8 TryWriteSector(u8 sectorNum, u8 *data)
+{
+    if (ProgramFlashSectorAndVerify(sectorNum, data) != 0) // is damaged?
+    {
+        SetSectorDamagedStatus(SECTOR_DAMAGED, sectorNum); // set damaged sector bits.
+        return SAVE_STATUS_ERROR;
+    }
+    else
+    {
+        SetSectorDamagedStatus(SECTOR_OK, sectorNum); // unset damaged sector bits. it's safe now.
+        return SAVE_STATUS_OK;
+    }
+}
+
+u32 RestoreSaveBackupVarsAndIncrement(const struct SaveBlockChunk *chunk) // chunk is unused
+{
+    gFastSaveSection = eSaveSection;
+    gLastKnownGoodSector = gFirstSaveSector;
+    gPrevSaveCounter = gSaveCounter;
+    gFirstSaveSector++;
+    gFirstSaveSector %= NUM_SECTORS_PER_SAVE_SLOT;
+    gSaveCounter++;
+    gCurSaveChunk = 0;
+    gDamagedSaveSectors = 0;
+    return 0;
+}
+
+u32 RestoreSaveBackupVars(const struct SaveBlockChunk *chunk)
+{
+    gFastSaveSection = eSaveSection;
+    gLastKnownGoodSector = gFirstSaveSector;
+    gPrevSaveCounter = gSaveCounter;
+    gCurSaveChunk = 0;
+    gDamagedSaveSectors = 0;
+    return 0;
+}
+
+u8 WriteSingleChunkAndIncrement(u16 a1, const struct SaveBlockChunk * chunk)
+{
+    u8 retVal;
+
+    if (gCurSaveChunk < a1 - 1)
+    {
+        retVal = SAVE_STATUS_OK;
+        WriteSingleChunk(gCurSaveChunk, chunk);
+        gCurSaveChunk++;
+        if (gDamagedSaveSectors)
+        {
+            retVal = SAVE_STATUS_ERROR;
+            gFirstSaveSector = gLastKnownGoodSector;
+            gSaveCounter = gPrevSaveCounter;
+        }
+    }
+    else
+    {
+        retVal = SAVE_STATUS_ERROR;
+    }
+
+    return retVal;
+}
+
+u8 ErasePreviousChunk(u16 a1, const struct SaveBlockChunk *chunk)
+{
+    u8 retVal = SAVE_STATUS_OK;
+
+    EraseCurrentChunk(a1 - 1, chunk);
+
+    if (gDamagedSaveSectors)
+    {
+        retVal = SAVE_STATUS_ERROR;
+        gFirstSaveSector = gLastKnownGoodSector;
+        gSaveCounter = gPrevSaveCounter;
+    }
+    return retVal;
+}
+
+u8 EraseCurrentChunk(u16 chunkId, const struct SaveBlockChunk *chunks)
+{
+    u16 i;
+    u16 sector;
+    u8 *data;
+    u16 size;
+    u8 status;
+
+    // select sector number
+    sector = chunkId + gFirstSaveSector;
+    sector %= NUM_SECTORS_PER_SAVE_SLOT;
+    // select save slot
+    sector += NUM_SECTORS_PER_SAVE_SLOT * (gSaveCounter % 2);
+
+    data = chunks[chunkId].data;
+    size = chunks[chunkId].size;
+
+    // clear temp save section.
+    for (i = 0; i < sizeof(struct SaveSector); i++)
+        ((char *)gFastSaveSection)[i] = 0;
+
+    gFastSaveSection->id = chunkId;
+    gFastSaveSection->signature = FILE_SIGNATURE;
+    gFastSaveSection->counter = gSaveCounter;
+
+    // set temp section's data.
+    for (i = 0; i < size; i++)
+        gFastSaveSection->data[i] = data[i];
+
+    // calculate checksum.
+    gFastSaveSection->checksum = CalculateChecksum(data, size);
+
+    EraseFlashSector(sector);
+
+    status = SAVE_STATUS_OK;
+
+    for (i = 0; i < sizeof(struct UnkSaveSection); i++)
+    {
+        if (ProgramFlashByte(sector, i, gFastSaveSection->data[i]))
+        {
+            status = SAVE_STATUS_ERROR;
+            break;
+        }
+    }
+
+    if (status == SAVE_STATUS_ERROR)
+    {
+        SetSectorDamagedStatus(SECTOR_DAMAGED, sector);
+        return SAVE_STATUS_ERROR;
+    }
+    else
+    {
+        status = SAVE_STATUS_OK;
+
+        for (i = 0; i < 7; i++)
+        {
+            if (ProgramFlashByte(sector, 0xFF9 + i, ((u8 *)gFastSaveSection)[0xFF9 + i]))
+            {
+                status = SAVE_STATUS_ERROR;
+                break;
+            }
+        }
+
+        if (status == SAVE_STATUS_ERROR)
+        {
+            SetSectorDamagedStatus(SECTOR_DAMAGED, sector);
+            return SAVE_STATUS_ERROR;
+        }
+        else
+        {
+            SetSectorDamagedStatus(SECTOR_OK, sector);
+            return SAVE_STATUS_OK;
+        }
+    }
+}
+
+u8 WriteSomeFlashByteToPrevSector(u16 a1, const struct SaveBlockChunk *chunk)
+{
+    u16 sector;
+
+    // select sector number
+    sector = a1 + gFirstSaveSector - 1;
+    sector %= NUM_SECTORS_PER_SAVE_SLOT;
+    // select save slot
+    sector += NUM_SECTORS_PER_SAVE_SLOT * (gSaveCounter % 2);
+
+    if (ProgramFlashByte(sector, sizeof(struct UnkSaveSection), ((u8 *)gFastSaveSection)[sizeof(struct UnkSaveSection)]))
+    {
+        // sector is damaged, so enable the bit in gDamagedSaveSectors and restore the last written sector and save counter.
+        SetSectorDamagedStatus(SECTOR_DAMAGED, sector);
+        gFirstSaveSector = gLastKnownGoodSector;
+        gSaveCounter = gPrevSaveCounter;
+        return SAVE_STATUS_ERROR;
+    }
+    else
+    {
+        SetSectorDamagedStatus(SECTOR_OK, sector);
+        return SAVE_STATUS_OK;
+    }
+}
+
+u8 WriteSomeFlashByte0x25ToPrevSector(u16 a1, const struct SaveBlockChunk *chunk)
+{
+    u16 sector;
+
+    sector = a1 + gFirstSaveSector - 1;
+    sector %= NUM_SECTORS_PER_SAVE_SLOT;
+    sector += NUM_SECTORS_PER_SAVE_SLOT * (gSaveCounter % 2);
+
+    if (ProgramFlashByte(sector, sizeof(struct UnkSaveSection), 0x25))
+    {
+        // sector is damaged, so enable the bit in gDamagedSaveSectors and restore the last written sector and save counter.
+        SetSectorDamagedStatus(SECTOR_DAMAGED, sector);
+        gFirstSaveSector = gLastKnownGoodSector;
+        gSaveCounter = gPrevSaveCounter;
+        return SAVE_STATUS_ERROR;
+    }
+    else
+    {
+        SetSectorDamagedStatus(SECTOR_OK, sector);
+        return SAVE_STATUS_OK;
+    }
+}
+
+u8 TryReadAllSaveSectorsCurrentSlot(u16 a1, const struct SaveBlockChunk *chunk)
+{
+    u8 retVal;
+    gFastSaveSection = eSaveSection;
+    if (a1 != 0xFFFF)
+    {
+        retVal = SAVE_STATUS_ERROR;
+    }
+    else
+    {
+        retVal = GetSaveValidStatus(chunk);
+        ReadAllSaveSectorsCurrentSlot(0xFFFF, chunk);
+    }
+
+    return retVal;
+}
+
+u8 ReadAllSaveSectorsCurrentSlot(u16 a1, const struct SaveBlockChunk *chunks)
+{
+    u16 i;
+    u16 checksum;
+    u16 sector = NUM_SECTORS_PER_SAVE_SLOT * (gSaveCounter % 2);
+    u16 id;
+
+    for (i = 0; i < NUM_SECTORS_PER_SAVE_SLOT; i++)
+    {
+        DoReadFlashWholeSection(i + sector, gFastSaveSection);
+        id = gFastSaveSection->id;
+        if (id == 0)
+            gFirstSaveSector = i;
+        checksum = CalculateChecksum(gFastSaveSection->data, chunks[id].size);
+        if (gFastSaveSection->signature == FILE_SIGNATURE
+            && gFastSaveSection->checksum == checksum)
+        {
+            u16 j;
+            for (j = 0; j < chunks[id].size; j++)
+                chunks[id].data[j] = gFastSaveSection->data[j];
+        }
+    }
+
+    return 1;
+}
+
+u8 GetSaveValidStatus(const struct SaveBlockChunk *chunks)
+{
+    u16 sector;
+    bool8 signatureValid;
+    u16 checksum;
+    u32 slot1saveCounter = 0;
+    u32 slot2saveCounter = 0;
+    u8 slot1Status;
+    u8 slot2Status;
+    u32 validSectors;
+    const u32 ALL_SECTORS = (1 << NUM_SECTORS_PER_SAVE_SLOT) - 1;  // bitmask of all saveblock sectors
+
+    // check save slot 1.
+    validSectors = 0;
+    signatureValid = FALSE;
+    for (sector = 0; sector < NUM_SECTORS_PER_SAVE_SLOT; sector++)
+    {
+        DoReadFlashWholeSection(sector, gFastSaveSection);
+        if (gFastSaveSection->signature == FILE_SIGNATURE)
+        {
+            signatureValid = TRUE;
+            checksum = CalculateChecksum(gFastSaveSection->data, chunks[gFastSaveSection->id].size);
+            if (gFastSaveSection->checksum == checksum)
+            {
+                slot1saveCounter = gFastSaveSection->counter;
+                validSectors |= 1 << gFastSaveSection->id;
+            }
+        }
+    }
+
+    if (signatureValid)
+    {
+        if (validSectors == ALL_SECTORS)
+            slot1Status = SAVE_STATUS_OK;
+        else
+            slot1Status = SAVE_STATUS_ERROR;
+    }
+    else
+    {
+        slot1Status = SAVE_STATUS_EMPTY;
+    }
+
+    // check save slot 2.
+    validSectors = 0;
+    signatureValid = FALSE;
+    for (sector = 0; sector < NUM_SECTORS_PER_SAVE_SLOT; sector++)
+    {
+        DoReadFlashWholeSection(NUM_SECTORS_PER_SAVE_SLOT + sector, gFastSaveSection);
+        if (gFastSaveSection->signature == FILE_SIGNATURE)
+        {
+            signatureValid = TRUE;
+            checksum = CalculateChecksum(gFastSaveSection->data, chunks[gFastSaveSection->id].size);
+            if (gFastSaveSection->checksum == checksum)
+            {
+                slot2saveCounter = gFastSaveSection->counter;
+                validSectors |= 1 << gFastSaveSection->id;
+            }
+        }
+    }
+
+    if (signatureValid)
+    {
+        if (validSectors == ALL_SECTORS)
+            slot2Status = SAVE_STATUS_OK;
+        else
+            slot2Status = SAVE_STATUS_ERROR;
+    }
+    else
+    {
+        slot2Status = SAVE_STATUS_EMPTY;
+    }
+
+    if (slot1Status == SAVE_STATUS_OK && slot2Status == SAVE_STATUS_OK)
+    {
+        // Choose counter of the most recent save file
+        if ((slot1saveCounter == -1 && slot2saveCounter == 0) || (slot1saveCounter == 0 && slot2saveCounter == -1))
+        {
+            if ((unsigned)(slot1saveCounter + 1) < (unsigned)(slot2saveCounter + 1))
+                gSaveCounter = slot2saveCounter;
+            else
+                gSaveCounter = slot1saveCounter;
+        }
+        else
+        {
+            if (slot1saveCounter < slot2saveCounter)
+                gSaveCounter = slot2saveCounter;
+            else
+                gSaveCounter = slot1saveCounter;
+        }
+        return SAVE_STATUS_OK;
+    }
+
+    if (slot1Status == SAVE_STATUS_OK)
+    {
+        gSaveCounter = slot1saveCounter;
+        if (slot2Status == SAVE_STATUS_ERROR)
+            return SAVE_STATUS_ERROR;
+        else
+            return SAVE_STATUS_OK;
+    }
+
+    if (slot2Status == SAVE_STATUS_OK)
+    {
+        gSaveCounter = slot2saveCounter;
+        if (slot1Status == SAVE_STATUS_ERROR)
+            return SAVE_STATUS_ERROR;
+        else
+            return SAVE_STATUS_OK;
+    }
+
+    if (slot1Status == SAVE_STATUS_EMPTY && slot2Status == SAVE_STATUS_EMPTY)
+    {
+        gSaveCounter = 0;
+        gFirstSaveSector = 0;
+        return SAVE_STATUS_EMPTY;
+    }
+
+    gSaveCounter = 0;
+    gFirstSaveSector = 0;
+    return 2;
+}
+
+u8 ReadSomeUnknownSectorAndVerify(u8 sector, u8 *data, u16 size)
+{
+    u16 i;
+    struct SaveSector *section = eSaveSection;
+
+    DoReadFlashWholeSection(sector, section);
+    if (section->signature == FILE_SIGNATURE)
+    {
+        u16 checksum = CalculateChecksum(section->data, size);
+        if (section->id == checksum)
+        {
+            for (i = 0; i < size; i++)
+                data[i] = section->data[i];
+            return SAVE_STATUS_OK;
+        }
+        else
+        {
+            return 2;
+        }
+    }
+    else
+    {
+        return SAVE_STATUS_EMPTY;
+    }
+}
+
+u32 DoReadFlashWholeSection(u8 sector, struct SaveSector *section)
+{
+    ReadFlash(sector, 0, section->data, sizeof(struct SaveSector));
+    return 1;
+}
+
+u16 CalculateChecksum(const void *data, u16 size)
+{
+    u16 i;
+    u32 checksum = 0;
+
+    for (i = 0; i < (size / 4); i++)
+    {
+        checksum += *((u32 *)data);
+        data += sizeof(u32);
+    }
+
+    return ((checksum >> 16) + checksum);
+}
+
+void nullsub_0201182C()
+{
+}
+
+void nullsub_02011830()
+{
+}
+
+void nullsub_02011834()
+{
+}
+
+u16 * get_var_addr(u16 a0)
+{
+    if (a0 < VARS_START)
+        return NULL;
+    if (a0 < VAR_SPECIAL_0)
+        return &gSaveBlock1.vars[a0 - VARS_START];
+    return NULL;
+}
+
+bool32 flash_maincb_check_need_reset_pacifidlog_tm(void)
+{
+    u8 sp0;
+    u16 * data = get_var_addr(VAR_PACIFIDLOG_TM_RECEIVED_DAY);
+    rtc_maincb_is_time_since_last_berry_update_positive(&sp0);
+    if (*data <= gRtcUTCTime.days)
+        return TRUE;
+    else
+        return FALSE;
+}
+
+bool32 flash_maincb_reset_pacifidlog_tm(void)
+{
+    u8 sp0;
+    if (flash_maincb_check_need_reset_pacifidlog_tm() == TRUE)
+        return TRUE;
+    rtc_maincb_is_time_since_last_berry_update_positive(&sp0);
+    if (gRtcUTCTime.days < 0)
+        return FALSE;
+    *get_var_addr(VAR_PACIFIDLOG_TM_RECEIVED_DAY) = 1;
+    if (flash_write_save_block_chunks_check_damage(0) != TRUE)
+        return FALSE;
+    return TRUE;
+}