#include <File.hpp>
#include <Mem.hpp>
#include <backend/RomHelpers.hpp>
#include <cassert>
#include <Core.hpp>
#include <Options.hpp>
#include <Registers.hpp>

namespace n64 {
#ifdef KAIZEN_JIT_ENABLED
Mem::Mem(JIT &jit) : flash(saveData), jit(jit) {
#else
Mem::Mem() : flash(saveData) {
#endif
    rom.cart.resize(CART_SIZE);
    std::ranges::fill(rom.cart, 0);
    isviewer_sink = std::ofstream("isviewer.log");
}

void Mem::Reset() {
    std::ranges::fill(isviewer, 0);
    flash.Reset();
    if (saveData.is_mapped()) {
        std::error_code error;
        saveData.sync(error);
        if (error) {
            Util::Error::GetInstance().Throw({Util::Error::Severity::NON_FATAL},
                                             {Util::Error::Type::COULD_NOT_SYNC_SAVE_DATA}, {}, {},
                                             "[Mem]: Could not sync save data!");
            return;
        }
        saveData.unmap();
    }
    mmio.Reset();
}

void Mem::LoadSRAM(SaveType save_type, fs::path path) {
    if (save_type == SAVE_SRAM_256k) {
        std::error_code error;
        std::string savePath = Options::GetInstance().GetValue<std::string>("general", "savePath");
        if (!savePath.empty()) {
            path = savePath / path.filename();
        }
        sramPath = path.replace_extension(".sram").string();
        if (saveData.is_mapped()) {
            saveData.sync(error);
            if (error) {
                Util::Error::GetInstance().Throw({Util::Error::Severity::NON_FATAL},
                                                 {Util::Error::Type::COULD_NOT_SYNC_SAVE_DATA}, {}, {},
                                                 R"([Mem]: Could not sync save data stored @ "{}")", sramPath);
                return;
            }
            saveData.unmap();
        }

        auto sramVec = ircolib::ReadFileBinary(sramPath);
        if (sramVec.empty()) {
            ircolib::WriteFileBinary(std::array<u8, SRAM_SIZE>{}, sramPath);
            sramVec = ircolib::ReadFileBinary(sramPath);
        }

        if (sramVec.size() != SRAM_SIZE) {
            Util::Error::GetInstance().Throw(
                {Util::Error::Severity::NON_FATAL}, {Util::Error::Type::SAVE_DATA_IS_CORRUPT_OR_INVALID_SIZE}, {}, {},
                "[Mem]: Save data is corrupt or has unexpected size! (it's {} KiB)", sramVec.size() / 1024);
            return;
        }

        saveData = mio::make_mmap_sink(sramPath, error);
        if (error) {
            Util::Error::GetInstance().Throw({Util::Error::Severity::NON_FATAL},
                                             {Util::Error::Type::MMAP_MAKE_SINK_ERROR}, {}, {},
                                             R"([Mem]: Could not create file sink for save data @ "{}")", sramPath);
        }
    }
}

FORCE_INLINE void SetROMCIC(u32 checksum, ROM &rom) {
    switch (checksum) {
    case 0xEC8B1325:
        rom.cicType = CIC_NUS_7102;
        break; // 7102
    case 0x1DEB51A9:
        rom.cicType = CIC_NUS_6101;
        break; // 6101
    case 0xC08E5BD6:
        rom.cicType = CIC_NUS_6102_7101;
        break;
    case 0x03B8376A:
        rom.cicType = CIC_NUS_6103_7103;
        break;
    case 0xCF7F41DC:
        rom.cicType = CIC_NUS_6105_7105;
        break;
    case 0xD1059C6A:
        rom.cicType = CIC_NUS_6106_7106;
        break;
    default:
        warn("Could not determine CIC TYPE! Checksum: 0x{:08X} is unknown!", checksum);
        rom.cicType = UNKNOWN_CIC_TYPE;
        break;
    }
}

void Mem::LoadROM(const bool isArchive, const std::string &filename) {
    u32 endianness;
    {
        size_t sizeAdjusted;
        std::vector<u8> buf{};
        if (isArchive) {
            buf = Util::OpenArchive(filename, sizeAdjusted);
        } else {
            buf = Util::OpenROM(filename, sizeAdjusted);
        }

        endianness = std::byteswap(ircolib::ReadAccess<u32>(buf, 0));
        Util::SwapN64Rom<true>(buf, endianness);

        std::ranges::copy(buf, rom.cart.begin());
        rom.mask = sizeAdjusted - 1;
        memcpy(&rom.header, buf.data(), sizeof(ROMHeader));
    }
    memcpy(rom.gameNameCart, rom.header.imageName, sizeof(rom.header.imageName));

    rom.header.clockRate = std::byteswap(rom.header.clockRate);
    rom.header.programCounter = std::byteswap(rom.header.programCounter);
    rom.header.release = std::byteswap(rom.header.release);
    rom.header.crc1 = std::byteswap(rom.header.crc1);
    rom.header.crc2 = std::byteswap(rom.header.crc2);
    rom.header.unknown = std::byteswap(rom.header.unknown);
    rom.header.unknown2 = std::byteswap(rom.header.unknown2);
    rom.header.manufacturerId = std::byteswap(rom.header.manufacturerId);
    rom.header.cartridgeId = std::byteswap(rom.header.cartridgeId);

    rom.code[0] = rom.header.manufacturerId & 0xFF;
    rom.code[1] = (rom.header.cartridgeId >> 8) & 0xFF;
    rom.code[2] = rom.header.cartridgeId & 0xFF;
    rom.code[3] = '\0';

    for (int i = sizeof(rom.header.imageName) - 1; rom.gameNameCart[i] == ' '; i--) {
        rom.gameNameCart[i] = '\0';
    }

    const u32 checksum = SDL_crc32(0, &rom.cart[0x40], 0x9C0);
    SetROMCIC(checksum, rom);
    endianness = std::byteswap(ircolib::ReadAccess<u32>(rom.cart, 0));
    Util::SwapN64Rom(rom.cart, endianness);
    rom.pal = IsROMPAL();
}

template <>
u8 Mem::Read(const u32 paddr) {
    n64::Registers &regs = n64::Core::GetRegs();
    const SI &si = mmio.si;

    if (ircolib::IsInsideRange(paddr, RDRAM_REGION_START, RDRAM_REGION_END))
        return mmio.rdp.ReadRDRAM<u8>(paddr);
    if (ircolib::IsInsideRange(paddr, DMEM_REGION_START, RSP_MEM_REGION_END)) {
        const auto &src = paddr & 0x1000 ? mmio.rsp.imem : mmio.rsp.dmem;
        return src[BYTE_ADDRESS(paddr & 0xfff)];
    }

    if (ircolib::IsInsideRange(paddr, CART_REGION_START_2_1, CART_REGION_END_1_2))
        return mmio.pi.BusRead<u8, false>(paddr);
    if (ircolib::IsInsideRange(paddr, AI_REGION_START, AI_REGION_END)) {
        const u32 w = mmio.ai.Read(paddr & ~3);
        const int offs = 3 - (paddr & 3);
        return w >> offs * 8 & 0xff;
    }

    if (ircolib::IsInsideRange(paddr, MMIO_REGION_START_1, MMIO_REGION_END_1) ||
        ircolib::IsInsideRange(paddr, MMIO_REGION_START_2, MMIO_REGION_END_2)) {
        Util::Error::GetInstance().Throw(
            {Util::Error::Severity::NON_FATAL}, {Util::Error::Type::MEM_INVALID_ACCESS}, regs.pc,
            Util::Error::MemoryAccess{false, Util::Error::MemoryAccess::BYTE, paddr, 0}, "8-bit read access from MMIO");
        return 0;
    }

    if (ircolib::IsInsideRange(paddr, PIF_ROM_REGION_START, PIF_ROM_REGION_END))
        return si.pif.bootrom[BYTE_ADDRESS(paddr) - PIF_ROM_REGION_START];
    if (ircolib::IsInsideRange(paddr, PIF_RAM_REGION_START, PIF_RAM_REGION_END))
        return si.pif.ram[paddr - PIF_RAM_REGION_START];
    if (ircolib::IsInsideRange(paddr, UNUSED_START_1, UNUSED_END_1) || // unused
        ircolib::IsInsideRange(paddr, UNUSED_START_2, UNUSED_END_2) ||
        ircolib::IsInsideRange(paddr, UNUSED_START_3, UNUSED_END_3) ||
        ircolib::IsInsideRange(paddr, UNUSED_START_4, UNUSED_END_4))
        return 0;

    Util::Error::GetInstance().Throw({Util::Error::Severity::NON_FATAL}, {Util::Error::Type::MEM_UNHANDLED_ACCESS},
                                     regs.pc,
                                     Util::Error::MemoryAccess{false, Util::Error::MemoryAccess::BYTE, paddr, 0},
                                     "8-bit read access in unhandled region");
    return 0;
}

template <>
u16 Mem::Read(const u32 paddr) {
    n64::Registers &regs = n64::Core::GetRegs();
    const SI &si = mmio.si;

    if (ircolib::IsInsideRange(paddr, RDRAM_REGION_START, RDRAM_REGION_END))
        return mmio.rdp.ReadRDRAM<u16>(paddr);
    if (ircolib::IsInsideRange(paddr, DMEM_REGION_START, RSP_MEM_REGION_END)) {
        const auto &src = paddr & 0x1000 ? mmio.rsp.imem : mmio.rsp.dmem;
        return ircolib::ReadAccess<u16>(src, HALF_ADDRESS(paddr & 0xfff));
    }

    if (ircolib::IsInsideRange(paddr, CART_REGION_START_2_1, CART_REGION_END_1_2))
        return mmio.pi.BusRead<u16, false>(paddr);
    if (ircolib::IsInsideRange(paddr, MMIO_REGION_START_1, MMIO_REGION_END_1) ||
        ircolib::IsInsideRange(paddr, MMIO_REGION_START_2, MMIO_REGION_END_2))
        return mmio.Read(paddr);
    if (ircolib::IsInsideRange(paddr, PIF_ROM_REGION_START, PIF_ROM_REGION_END))
        return ircolib::ReadAccess<u16>(si.pif.bootrom, HALF_ADDRESS(paddr) - PIF_ROM_REGION_START);
    if (ircolib::IsInsideRange(paddr, PIF_RAM_REGION_START, PIF_RAM_REGION_END))
        return std::byteswap(ircolib::ReadAccess<u16>(si.pif.ram, paddr - PIF_RAM_REGION_START));
    if (ircolib::IsInsideRange(paddr, UNUSED_START_1, UNUSED_END_1) || // unused
        ircolib::IsInsideRange(paddr, UNUSED_START_2, UNUSED_END_2) ||
        ircolib::IsInsideRange(paddr, UNUSED_START_3, UNUSED_END_3) ||
        ircolib::IsInsideRange(paddr, UNUSED_START_4, UNUSED_END_4))
        return 0;

    Util::Error::GetInstance().Throw({Util::Error::Severity::NON_FATAL}, {Util::Error::Type::MEM_UNHANDLED_ACCESS},
                                     regs.pc,
                                     Util::Error::MemoryAccess{false, Util::Error::MemoryAccess::SHORT, paddr, 0},
                                     "16-bit read access in unhandled region");
    return 0;
}

template <>
u32 Mem::Read(const u32 paddr) {
    n64::Registers &regs = n64::Core::GetRegs();
    const SI &si = mmio.si;

    if (ircolib::IsInsideRange(paddr, RDRAM_REGION_START, RDRAM_REGION_END))
        return mmio.rdp.ReadRDRAM<u32>(paddr);
    if (ircolib::IsInsideRange(paddr, DMEM_REGION_START, RSP_MEM_REGION_END)) {
        const auto &src = paddr & 0x1000 ? mmio.rsp.imem : mmio.rsp.dmem;
        return ircolib::ReadAccess<u32>(src, paddr & 0xfff);
    }

    if (ircolib::IsInsideRange(paddr, CART_REGION_START_2_1, CART_REGION_END_1_2))
        return mmio.pi.BusRead<u32, false>(paddr);
    if (ircolib::IsInsideRange(paddr, MMIO_REGION_START_1, MMIO_REGION_END_1) ||
        ircolib::IsInsideRange(paddr, MMIO_REGION_START_2, MMIO_REGION_END_2))
        return mmio.Read(paddr);

    if (ircolib::IsInsideRange(paddr, PIF_ROM_REGION_START, PIF_ROM_REGION_END))
        return ircolib::ReadAccess<u32>(si.pif.bootrom, paddr - PIF_ROM_REGION_START);
    if (ircolib::IsInsideRange(paddr, PIF_RAM_REGION_START, PIF_RAM_REGION_END))
        return std::byteswap(ircolib::ReadAccess<u32>(si.pif.ram, paddr - PIF_RAM_REGION_START));
    if (ircolib::IsInsideRange(paddr, UNUSED_START_1, UNUSED_END_1) || // unused
        ircolib::IsInsideRange(paddr, UNUSED_START_2, UNUSED_END_2) ||
        ircolib::IsInsideRange(paddr, UNUSED_START_3, UNUSED_END_3) ||
        ircolib::IsInsideRange(paddr, UNUSED_START_4, UNUSED_END_4))
        return 0;

    Util::Error::GetInstance().Throw({Util::Error::Severity::NON_FATAL}, {Util::Error::Type::MEM_UNHANDLED_ACCESS},
                                     regs.pc,
                                     Util::Error::MemoryAccess{false, Util::Error::MemoryAccess::WORD, paddr, 0},
                                     "32-bit read access in unhandled region");
    return 0;
}

template <>
u64 Mem::Read(const u32 paddr) {
    n64::Registers &regs = n64::Core::GetRegs();
    const SI &si = mmio.si;

    if (ircolib::IsInsideRange(paddr, RDRAM_REGION_START, RDRAM_REGION_END))
        return mmio.rdp.ReadRDRAM<u64>(paddr);
    if (ircolib::IsInsideRange(paddr, DMEM_REGION_START, RSP_MEM_REGION_END)) {
        const auto &src = paddr & 0x1000 ? mmio.rsp.imem : mmio.rsp.dmem;
        return ircolib::ReadAccess<u64>(src, paddr & 0xfff);
    }

    if (ircolib::IsInsideRange(paddr, CART_REGION_START_2_1, CART_REGION_END_1_2))
        return mmio.pi.BusRead<u64, false>(paddr);
    if (ircolib::IsInsideRange(paddr, MMIO_REGION_START_1, MMIO_REGION_END_1) ||
        ircolib::IsInsideRange(paddr, MMIO_REGION_START_2, MMIO_REGION_END_2))
        return mmio.Read(paddr);

    if (ircolib::IsInsideRange(paddr, PIF_ROM_REGION_START, PIF_ROM_REGION_END))
        return ircolib::ReadAccess<u64>(si.pif.bootrom, paddr - PIF_ROM_REGION_START);
    if (ircolib::IsInsideRange(paddr, PIF_RAM_REGION_START, PIF_RAM_REGION_END))
        return std::byteswap(ircolib::ReadAccess<u64>(si.pif.ram, paddr - PIF_RAM_REGION_START));
    if (ircolib::IsInsideRange(paddr, UNUSED_START_1, UNUSED_END_1) || // unused
        ircolib::IsInsideRange(paddr, UNUSED_START_2, UNUSED_END_2) ||
        ircolib::IsInsideRange(paddr, UNUSED_START_3, UNUSED_END_3) ||
        ircolib::IsInsideRange(paddr, UNUSED_START_4, UNUSED_END_4))
        return 0;

    Util::Error::GetInstance().Throw({Util::Error::Severity::NON_FATAL}, {Util::Error::Type::MEM_UNHANDLED_ACCESS},
                                     regs.pc,
                                     Util::Error::MemoryAccess{false, Util::Error::MemoryAccess::DWORD, paddr, 0},
                                     "64-bit read access in unhandled region");
    return 0;
}

template <>
void Mem::Write<u8>(u32 paddr, u32 val) {
    n64::Registers &regs = n64::Core::GetRegs();
    SI &si = mmio.si;

#ifdef KAIZEN_JIT_ENABLED
    jit.InvalidateBlock(paddr);
#endif

    if (ircolib::IsInsideRange(paddr, RDRAM_REGION_START, RDRAM_REGION_END)) {
        mmio.rdp.WriteRDRAM<u8>(paddr, val);
        return;
    }
    if (ircolib::IsInsideRange(paddr, DMEM_REGION_START, RSP_MEM_REGION_END)) {
        val = val << (8 * (3 - (paddr & 3)));
        auto &dest = paddr & 0x1000 ? mmio.rsp.imem : mmio.rsp.dmem;
        paddr = (paddr & 0xFFF) & ~3;
        ircolib::WriteAccess<u32>(dest, paddr, val);
        return;
    }

    if (ircolib::IsInsideRange(paddr, CART_REGION_START_2_1, CART_REGION_END_1_2)) {
        trace("BusWrite<u8> @ {:08X} = {:02X}", paddr, val);
        mmio.pi.BusWrite<u8, false>(paddr, val);
        return;
    }

    if (ircolib::IsInsideRange(paddr, MMIO_REGION_START_1, MMIO_REGION_END_1) ||
        ircolib::IsInsideRange(paddr, MMIO_REGION_START_2, MMIO_REGION_END_2))
        panic("MMIO Write<u8>!");

    if (ircolib::IsInsideRange(paddr, PIF_RAM_REGION_START, PIF_RAM_REGION_END)) {
        val = val << (8 * (3 - (paddr & 3)));
        paddr = (paddr - PIF_RAM_REGION_START) & ~3;
        ircolib::WriteAccess<u32>(si.pif.ram, paddr, std::byteswap(val));
        si.pif.ProcessCommands();
        return;
    }

    if (ircolib::IsInsideRange(paddr, UNUSED_START_1, UNUSED_END_1) || // unused
        ircolib::IsInsideRange(paddr, UNUSED_START_2, UNUSED_END_2) ||
        ircolib::IsInsideRange(paddr, UNUSED_START_3, UNUSED_END_3) ||
        ircolib::IsInsideRange(paddr, PIF_ROM_REGION_START, PIF_ROM_REGION_END) ||
        ircolib::IsInsideRange(paddr, UNUSED_START_4, UNUSED_END_4))
        return;

    panic("Unimplemented 8-bit write at address {:08X} with value {:02X} (PC = {:016X})", paddr, val, (u64)regs.pc);
}

template <>
void Mem::Write<u16>(u32 paddr, u32 val) {
    n64::Registers &regs = n64::Core::GetRegs();
    SI &si = mmio.si;

#ifdef KAIZEN_JIT_ENABLED
    jit.InvalidateBlock(paddr);
#endif

    if (ircolib::IsInsideRange(paddr, RDRAM_REGION_START, RDRAM_REGION_END)) {
        mmio.rdp.WriteRDRAM<u16>(paddr, val);
        return;
    }
    if (ircolib::IsInsideRange(paddr, DMEM_REGION_START, RSP_MEM_REGION_END)) {
        val = val << (16 * !(paddr & 2));
        auto &dest = paddr & 0x1000 ? mmio.rsp.imem : mmio.rsp.dmem;
        paddr = (paddr & 0xFFF) & ~3;
        ircolib::WriteAccess<u32>(dest, paddr, val);
        return;
    }

    if (ircolib::IsInsideRange(paddr, CART_REGION_START_2_1, CART_REGION_END_1_2)) {
        trace("BusWrite<u8> @ {:08X} = {:04X}", paddr, val);
        mmio.pi.BusWrite<u16, false>(paddr, val);
        return;
    }

    if (ircolib::IsInsideRange(paddr, MMIO_REGION_START_1, MMIO_REGION_END_1) ||
        ircolib::IsInsideRange(paddr, MMIO_REGION_START_2, MMIO_REGION_END_2))
        panic("MMIO Write<u16>!");

    if (ircolib::IsInsideRange(paddr, PIF_RAM_REGION_START, PIF_RAM_REGION_END)) {
        val = val << (16 * !(paddr & 2));
        paddr &= ~3;
        ircolib::WriteAccess<u32>(si.pif.ram, paddr - PIF_RAM_REGION_START, std::byteswap(val));
        si.pif.ProcessCommands();
        return;
    }

    if (ircolib::IsInsideRange(paddr, UNUSED_START_1, UNUSED_END_1) || // unused
        ircolib::IsInsideRange(paddr, UNUSED_START_2, UNUSED_END_2) ||
        ircolib::IsInsideRange(paddr, UNUSED_START_3, UNUSED_END_3) ||
        ircolib::IsInsideRange(paddr, PIF_ROM_REGION_START, PIF_ROM_REGION_END) ||
        ircolib::IsInsideRange(paddr, UNUSED_START_4, UNUSED_END_4))
        return;

    panic("Unimplemented 16-bit write at address {:08X} with value {:04X} (PC = {:016X})", paddr, val, (u64)regs.pc);
}

template <>
void Mem::Write<u32>(const u32 paddr, const u32 val) {
    n64::Registers &regs = n64::Core::GetRegs();
    SI &si = mmio.si;

#ifdef KAIZEN_JIT_ENABLED
    jit.InvalidateBlock(paddr);
#endif

    if (ircolib::IsInsideRange(paddr, RDRAM_REGION_START, RDRAM_REGION_END)) {
        mmio.rdp.WriteRDRAM<u32>(paddr, val);
        return;
    }
    if (ircolib::IsInsideRange(paddr, DMEM_REGION_START, RSP_MEM_REGION_END)) {
        auto &dest = paddr & 0x1000 ? mmio.rsp.imem : mmio.rsp.dmem;
        ircolib::WriteAccess<u32>(dest, paddr & 0xfff, val);
        return;
    }

    if (ircolib::IsInsideRange(paddr, CART_REGION_START_2_1, CART_REGION_END_1_2)) {
        trace("BusWrite<u8> @ {:08X} = {:08X}", paddr, val);
        mmio.pi.BusWrite<u32, false>(paddr, val);
        return;
    }

    if (ircolib::IsInsideRange(paddr, MMIO_REGION_START_1, MMIO_REGION_END_1) ||
        ircolib::IsInsideRange(paddr, MMIO_REGION_START_2, MMIO_REGION_END_2)) {
        mmio.Write(paddr, val);
        return;
    }

    if (ircolib::IsInsideRange(paddr, PIF_RAM_REGION_START, PIF_RAM_REGION_END)) {
        ircolib::WriteAccess<u32>(si.pif.ram, paddr - PIF_RAM_REGION_START, std::byteswap(val));
        si.pif.ProcessCommands();
        return;
    }

    if (ircolib::IsInsideRange(paddr, UNUSED_START_1, UNUSED_END_1) || // unused
        ircolib::IsInsideRange(paddr, UNUSED_START_2, UNUSED_END_2) ||
        ircolib::IsInsideRange(paddr, UNUSED_START_3, UNUSED_END_3) ||
        ircolib::IsInsideRange(paddr, PIF_ROM_REGION_START, PIF_ROM_REGION_END) ||
        ircolib::IsInsideRange(paddr, UNUSED_START_4, UNUSED_END_4))
        return;

    panic("Unimplemented 32-bit write at address {:08X} with value {:08X} (PC = {:016X})", paddr, val, (u64)regs.pc);
}

void Mem::Write(const u32 paddr, u64 val) {
    n64::Registers &regs = n64::Core::GetRegs();
    SI &si = mmio.si;

#ifdef KAIZEN_JIT_ENABLED
    jit.InvalidateBlock(paddr);
#endif

    if (ircolib::IsInsideRange(paddr, RDRAM_REGION_START, RDRAM_REGION_END)) {
        mmio.rdp.WriteRDRAM<u64>(paddr, val);
        return;
    }
    if (ircolib::IsInsideRange(paddr, DMEM_REGION_START, RSP_MEM_REGION_END)) {
        auto &dest = paddr & 0x1000 ? mmio.rsp.imem : mmio.rsp.dmem;
        val >>= 32;
        ircolib::WriteAccess<u32>(dest, paddr & 0xfff, val);
        return;
    }

    if (ircolib::IsInsideRange(paddr, CART_REGION_START_2_1, CART_REGION_END_1_2)) {
        trace("BusWrite<u64> @ {:08X} = {:016X}", paddr, val);
        mmio.pi.BusWrite<false>(paddr, val);
        return;
    }

    if (ircolib::IsInsideRange(paddr, MMIO_REGION_START_1, MMIO_REGION_END_1) ||
        ircolib::IsInsideRange(paddr, MMIO_REGION_START_2, MMIO_REGION_END_2))
        panic("MMIO Write<u64>!");

    if (ircolib::IsInsideRange(paddr, PIF_RAM_REGION_START, PIF_RAM_REGION_END)) {
        ircolib::WriteAccess<u64>(si.pif.ram, paddr - PIF_RAM_REGION_START, std::byteswap(val));
        si.pif.ProcessCommands();
        return;
    }

    if (ircolib::IsInsideRange(paddr, UNUSED_START_1, UNUSED_END_1) || // unused
        ircolib::IsInsideRange(paddr, UNUSED_START_2, UNUSED_END_2) ||
        ircolib::IsInsideRange(paddr, UNUSED_START_3, UNUSED_END_3) ||
        ircolib::IsInsideRange(paddr, PIF_ROM_REGION_START, PIF_ROM_REGION_END) ||
        ircolib::IsInsideRange(paddr, UNUSED_START_4, UNUSED_END_4))
        return;

    panic("Unimplemented 64-bit write at address {:08X} with value {:016X} (PC = {:016X})", paddr, val, (u64)regs.pc);
}

template <>
u32 Mem::BackupRead<u32>(const u32 addr) {
    switch (saveType) {
    case SAVE_NONE:
        return 0;
    case SAVE_EEPROM_4k:
    case SAVE_EEPROM_16k:
        warn("Accessing cartridge backup type SAVE_EEPROM, returning 0 for word read");
        return 0;
    case SAVE_FLASH_1m:
        return flash.Read<u32>(addr);
    case SAVE_SRAM_256k:
        return 0xFFFFFFFF;
    default:
        panic("Backup read word with unknown save type");
    }
}

template <>
u8 Mem::BackupRead<u8>(const u32 addr) {
    switch (saveType) {
    case SAVE_NONE:
        return 0;
    case SAVE_EEPROM_4k:
    case SAVE_EEPROM_16k:
        warn("Accessing cartridge backup type SAVE_EEPROM, returning 0 for word read");
        return 0;
    case SAVE_FLASH_1m:
        return flash.Read<u8>(addr);
    case SAVE_SRAM_256k:
        if (saveData.is_mapped()) {
            assert(addr < saveData.size());
            return saveData[addr];
        } else {
            panic("Invalid backup Read<u8> if save data is not initialized");
        }
    default:
        panic("Backup read word with unknown save type");
    }
}

template <>
void Mem::BackupWrite<u32>(const u32 addr, const u32 val) {
    switch (saveType) {
    case SAVE_NONE:
        warn("Accessing cartridge with save type SAVE_NONE in write word");
        break;
    case SAVE_EEPROM_4k:
    case SAVE_EEPROM_16k:
        panic("Accessing cartridge with save type SAVE_EEPROM in write word");
    case SAVE_FLASH_1m:
        flash.Write<u32>(addr, val);
        break;
    case SAVE_SRAM_256k:
        break;
    default:
        panic("Backup read word with unknown save type");
    }
}

template <>
void Mem::BackupWrite<u8>(const u32 addr, const u8 val) {
    switch (saveType) {
    case SAVE_NONE:
        warn("Accessing cartridge with save type SAVE_NONE in write word");
        break;
    case SAVE_EEPROM_4k:
    case SAVE_EEPROM_16k:
        panic("Accessing cartridge with save type SAVE_EEPROM in write word");
    case SAVE_FLASH_1m:
        flash.Write<u8>(addr, val);
        break;
    case SAVE_SRAM_256k:
        if (saveData.is_mapped()) {
            assert(addr < saveData.size());
            saveData[addr] = val;
        } else {
            panic("Invalid backup Write<u8> if save data is not initialized");
        }
        break;
    default:
        panic("Backup read word with unknown save type");
    }
}
} // namespace n64