XFESystem

using System.Runtime.InteropServices;

namespace XFESystem.NativeKernel;

// This ABI contains integers only. It reports discovery, never an initialized
// graphics/compute device. Unknown BAR sizes are zero, not guessed from a model.
[StructLayout(LayoutKind.Sequential, Pack = 8)]
public struct NativeGpuBarDiscovery
{
    public ulong Address, Size;
    public uint Index, Flags, SizeSource, Reserved;
}

[StructLayout(LayoutKind.Sequential, Pack = 8)]
public struct NativeGpuDeviceDiscovery
{
    public uint AbiVersion, RecordBytes, Segment, Bus, Device, Function;
    public uint VendorId, DeviceId, ClassCode, Revision, HeaderType, Command, Status;
    public uint PcieCapabilityOffset, CapabilityStatus, ExtendedStatus, RebarStatus, Flags;
    public ulong EcamPhysical;
    public NativeGpuBarDiscovery Bar0, Bar1, Bar2, Bar3, Bar4, Bar5;
}

/// <summary>Bounded, read-only PCI discovery on the independent BSP kernel.</summary>
public static unsafe class GpuHardwareBridge
{
    public const uint AbiVersion = 1, RecordLimit = 8;
    public const uint Memory = 1, Io = 2, Width64 = 4, Prefetch = 8, UpperHalf = 16;
    public const uint Unassigned = 32, Invalid = 64, SizeKnown = 128;
    public const uint SourceUnknown = 0, SourceRebar = 1, SourceFirmware = 2;
    public const uint Sm120Candidate = 1;
    // CapabilityStatus: 0 absent, 1 PCIe found, 2 malformed.
    // ExtendedStatus: 0 unavailable, 1 valid, 2 malformed, 3 mapping/identity failed.
    // RebarStatus: 0 unavailable, 1 absent, 2 validated current size, 3 malformed.
    // McfgStatus: 0 absent, 1 validated table, 2 rejected ACPI/MCFG.
    const ulong PhysicalLimit = 1UL << 52;
    static NativeGpuDeviceDiscovery* _records;
    static uint _state, _count, _matched, _mcfgStatus, _mcfgEntries, _unmapFailures;
    static ulong _configurationReads, _ecamMaps;
    static byte* _mcfg;

    // Reuse the network bridge's IRQ-serialized configuration mechanism. Its
    // CF8 address-port write is not a PCI configuration-data write. This probe
    // neither imports the PCI-write ABI nor enables bus mastering/memory decode.
    [DllImport("xfe_native", EntryPoint = "xfe_network_pci_read")]
    static extern uint ReadPci(uint bus, uint device, uint function, uint offset);

    static uint Read(uint bus, uint device, uint function, uint offset)
    {
        _configurationReads++;
        return ReadPci(bus, device, function, offset);
    }

    public static void Initialize(NativeBootInfo* boot)
    {
        if (_state != 0) return;
        _state = 1;
        NativeGpuFirmware.Initialize(boot);
        Serial.Line("XFE_GPU_DISCOVERY_BEGIN|Version|1|ReadOnly|1|BarAccess|0|GpuAcceleration|0|Cuda|0");
        ulong physical = PhysicalMemory.Allocate();
        if (physical == 0 || sizeof(NativeGpuDeviceDiscovery) * RecordLimit > 4096)
        {
            _state = 3;
            Serial.Line("XFE_GPU_DISCOVERY_UNAVAILABLE|Reason|RecordStorage");
            PrintSummary();
            return;
        }
        _records = (NativeGpuDeviceDiscovery*)PhysicalMemory.ToVirtual(physical);
        byte* mcfg = null; uint mcfgEntries = 0;
        _mcfgStatus = LocateMcfg(boot, &mcfg, &mcfgEntries);
        _mcfg = mcfg; _mcfgEntries = mcfgEntries;
        Serial.Write("XFE_GPU_DISCOVERY_PLATFORM|McfgStatus|"); Serial.Number(_mcfgStatus);
        Serial.Write("|McfgEntries|"); Serial.Number(_mcfgEntries);
        Serial.Line("|Segment|0|RecordLimit|8");
        uint* configuration = stackalloc uint[1024];
        for (uint bus = 0; bus < 256; bus++)
            for (uint device = 0; device < 32; device++)
            {
                uint identity = Read(bus, device, 0, 0);
                if ((identity & 65535) == 65535 || (identity & 65535) == 0) continue;
                uint header = Read(bus, device, 0, 12);
                uint functions = (header & 0x800000) != 0 ? 8u : 1u;
                for (uint function = 0; function < functions; function++)
                {
                    uint id = function == 0 ? identity : Read(bus, device, function, 0);
                    if ((id & 65535) != 0x10de) continue;
                    uint classCode = Read(bus, device, function, 8);
                    if ((classCode >> 24) != 3) continue;
                    _matched++;
                    if (_count == RecordLimit) continue;
                    for (uint word = 0; word < 64; word++) configuration[word] = Read(bus, device, function, word * 4);
                    NativeGpuDeviceDiscovery* record = _records + _count;
                    if (!DecodeConfiguration(configuration, 64, record)) continue;
                    record->Bus = bus; record->Device = device; record->Function = function;
                    if (record->CapabilityStatus == 1 && _mcfgStatus == 1 &&
                        TryEcamAddress(boot, _mcfg, _mcfgEntries, bus, device, function, &physical))
                    {
                        ulong flags = Native.IrqSave();
                        ulong mapping = VirtualMemory.MapDeviceReadOnly(physical, 4096);
                        Native.IrqRestore(flags);
                        if (mapping != 0)
                        {
                            _ecamMaps++;
                            uint ecamIdentity = Native.MmioRead32(mapping), ecamClass = Native.MmioRead32(mapping + 8);
                            uint ecamHeader = Native.MmioRead32(mapping + 12), ecamCommand = Native.MmioRead32(mapping + 4);
                            _configurationReads += 4;
                            bool identityMatches = ecamIdentity == configuration[0] && ecamClass == configuration[2] &&
                                ((ecamHeader ^ configuration[3]) & 0xff0000) == 0 && ((ecamCommand ^ configuration[1]) & 7) == 0;
                            // Two identical GPUs may have the same vendor/class.
                            // Cross-check their assigned BAR configuration too;
                            // these are PCI config reads, not BAR-aperture reads.
                            for (uint bar = 0; bar < 6; bar++)
                            {
                                uint assigned = Native.MmioRead32(mapping + 16 + bar * 4);
                                _configurationReads++;
                                if (assigned != configuration[4 + bar]) identityMatches = false;
                            }
                            if (identityMatches)
                            {
                                for (uint word = 64; word < 1024; word++)
                                    configuration[word] = Native.MmioRead32(mapping + word * 4);
                                _configurationReads += 960;
                                DecodeConfiguration(configuration, 1024, record);
                                record->Bus = bus; record->Device = device; record->Function = function;
                                record->EcamPhysical = physical;
                            }
                            else record->ExtendedStatus = 3;
                            flags = Native.IrqSave();
                            bool unmapped = VirtualMemory.UnmapDevice(mapping, 4096);
                            Native.IrqRestore(flags);
                            if (!unmapped) _unmapFailures++;
                        }
                        else record->ExtendedStatus = 3;
                    }
                    NativeGpuFirmware.Apply(boot, record);
                    PrintRecord(_count, record);
                    _count++;
                }
            }
        _state = 2;
        PrintSummary();
    }

    // A fixed integer ABI: 0 version, 1 record bytes, 2 saved count, 3 matched
    // count, 4 state (0 not run/1 running/2 complete/3 unavailable), 5 MCFG
    // status, 6 configuration reads, 7 GPU acceleration=0, 8 CUDA=0,
    // 9 capacity, 10 omitted, 11 ECAM page maps, 12 unmap failures, 13 BAR bytes,
    // 14..19 additive firmware diagnostic version/stage/count/address/match/BAR0.
    [UnmanagedCallersOnly(EntryPoint = "xfe_gpu_discovery_info")]
    public static ulong Info(uint field)
    {
        if (field == 0) return AbiVersion;
        if (field == 1) return (ulong)sizeof(NativeGpuDeviceDiscovery);
        if (field == 2) return _count;
        if (field == 3) return _matched;
        if (field == 4) return _state;
        if (field == 5) return _mcfgStatus;
        if (field == 6) return _configurationReads;
        if (field == 9) return RecordLimit;
        if (field == 10) return _matched - _count;
        if (field == 11) return _ecamMaps;
        if (field == 12) return _unmapFailures;
        if (field == 13) return (ulong)sizeof(NativeGpuBarDiscovery);
        if (field >= 14 && field <= 19) return NativeGpuFirmware.Diagnostic(field - 14);
        return 0;
    }

    [UnmanagedCallersOnly(EntryPoint = "xfe_gpu_discovery_record")]
    public static int CopyRecord(uint index, NativeGpuDeviceDiscovery* destination, uint bytes)
    {
        if (_state != 2 || destination == null || index >= _count || bytes < sizeof(NativeGpuDeviceDiscovery)) return 0;
        *destination = _records[index];
        return 1;
    }

    // Pure snapshot parsing, shared verbatim with the host safety checks.
    // Constants follow PCI/PCIe definitions, including the read-only ReBAR
    // capability/control layout in edk2 MdePkg/IndustryStandard/PciExpress21.h.
    public static bool DecodeConfiguration(uint* config, uint words, NativeGpuDeviceDiscovery* result)
    {
        if (result == null) return false;
        *result = default;
        if (config == null || (words != 64 && words != 1024) ||
            (config[0] & 65535) != 0x10de || (config[2] >> 24) != 3) return false;
        result->AbiVersion = AbiVersion; result->RecordBytes = (uint)sizeof(NativeGpuDeviceDiscovery);
        result->VendorId = config[0] & 65535; result->DeviceId = config[0] >> 16;
        result->ClassCode = config[2] >> 8; result->Revision = config[2] & 255;
        result->HeaderType = (config[3] >> 16) & 255;
        result->Command = config[1] & 65535; result->Status = config[1] >> 16;
        if ((result->HeaderType & 127) != 0) { result->CapabilityStatus = 2; return true; }
        NativeGpuBarDiscovery* bars = &result->Bar0;
        for (uint i = 0; i < 6; i++)
        {
            bars[i].Index = i;
            uint low = config[4 + i];
            if (low == 0) continue;
            if (low == 0xffffffff) { bars[i].Flags = Invalid; continue; }
            if ((low & 1) != 0) { bars[i].Address = low & ~3u; bars[i].Flags = Io; continue; }
            uint type = low & 6;
            bars[i].Flags = Memory | ((low & 8) != 0 ? Prefetch : 0);
            bars[i].Address = low & ~15u;
            if (type == 4 && i < 5)
            {
                bars[i].Address |= (ulong)config[5 + i] << 32;
                bars[i].Flags |= Width64;
                bars[i + 1].Index = i + 1; bars[i + 1].Flags = UpperHalf;
            }
            else if (type != 0) bars[i].Flags |= Invalid;
            if (bars[i].Address == 0) bars[i].Flags |= Unassigned;
            if (bars[i].Address >= PhysicalLimit) bars[i].Flags |= Invalid;
            if (type == 4 && i < 5) i++;
        }
        if ((result->Status & 16) != 0)
        {
            uint offset = config[13] & 255;
            ulong visited = 0;
            while (offset != 0)
            {
                if (offset < 64 || offset > 252 || (offset & 3) != 0 || (visited & (1UL << (int)(offset / 4))) != 0)
                { result->CapabilityStatus = 2; break; }
                visited |= 1UL << (int)(offset / 4);
                uint capability = config[offset / 4];
                if ((capability & 255) == 0x10)
                {
                    if (result->PcieCapabilityOffset != 0 || ((capability >> 16) & 15) == 0)
                    { result->CapabilityStatus = 2; break; }
                    result->PcieCapabilityOffset = offset;
                    result->CapabilityStatus = 1;
                }
                offset = (capability >> 8) & 255;
            }
        }
        if (result->CapabilityStatus == 1 && result->DeviceId == 0x2b85) result->Flags = Sm120Candidate;
        if (words == 1024 && result->CapabilityStatus == 1) DecodeExtended(config, result);
        return true;
    }

    static void DecodeExtended(uint* config, NativeGpuDeviceDiscovery* result)
    {
        result->ExtendedStatus = 1; result->RebarStatus = 1;
        uint* visited = stackalloc uint[32];
        for (uint i = 0; i < 32; i++) visited[i] = 0;
        uint offset = 256, rebarOffset = 0;
        while (offset != 0)
        {
            if (offset < 256 || offset > 4092 || (offset & 3) != 0) { RejectExtended(result); return; }
            uint word = offset / 4, bit = 1u << (int)(word & 31);
            if ((visited[word / 32] & bit) != 0) { RejectExtended(result); return; }
            visited[word / 32] |= bit;
            uint header = config[word];
            if (offset == 256 && (header == 0 || header == 0xffffffff)) return;
            if ((header & 65535) == 0 || (header & 65535) == 65535 || ((header >> 16) & 15) == 0)
            { RejectExtended(result); return; }
            uint next = header >> 20;
            if ((header & 65535) == 0x15)
            {
                if (rebarOffset != 0 || ((header >> 16) & 15) != 1 || offset > 4084)
                { RejectExtended(result); return; }
                rebarOffset = offset;
                uint entries = (config[(offset + 8) / 4] >> 5) & 7;
                if (entries == 0 || entries > 6 || 4 + entries * 8 > 4096 - offset ||
                    (next > offset && next < offset + 4 + entries * 8)) { RejectExtended(result); return; }
                uint seenBars = 0;
                NativeGpuBarDiscovery* bars = &result->Bar0;
                for (uint i = 0; i < entries; i++)
                {
                    uint capability = config[(offset + 4 + i * 8) / 4], control = config[(offset + 8 + i * 8) / 4];
                    uint index = control & 7, sizeCode = (control >> 8) & 63;
                    // PCIe's newer definition extends supported-size bits into
                    // Control[31:16]. Never accept a size absent from that mask.
                    ulong supported = (capability >> 4) | ((ulong)(control >> 16) << 28);
                    if (index >= 6 || (seenBars & (1u << (int)index)) != 0 || (capability & 15) != 0 ||
                        (control & 0xc018) != 0 || sizeCode > 43 || (supported & (1UL << (int)sizeCode)) == 0 ||
                        !ApplyResourceSize(bars + index, bars[index].Address, 1UL << (int)(20 + sizeCode), SourceRebar))
                    { RejectExtended(result); return; }
                    seenBars |= 1u << (int)index;
                }
                result->RebarStatus = 2;
            }
            offset = next;
        }
    }

    static void RejectExtended(NativeGpuDeviceDiscovery* result)
    {
        result->ExtendedStatus = 2; result->RebarStatus = 3;
        NativeGpuBarDiscovery* bars = &result->Bar0;
        for (uint i = 0; i < 6; i++) { bars[i].Flags &= ~SizeKnown; bars[i].Size = 0; bars[i].SizeSource = SourceUnknown; }
    }

    // Firmware/resource providers may add a size only for the exact assigned
    // memory BAR. A conflicting independent size invalidates both claims.
    public static bool ApplyResourceSize(NativeGpuBarDiscovery* bar, ulong address, ulong bytes, uint source)
    {
        if (bar == null || source == SourceUnknown || source > SourceFirmware || bar->Address != address ||
            address == 0 || bytes < 16 || (bytes & (bytes - 1)) != 0 || (address & (bytes - 1)) != 0 ||
            address >= PhysicalLimit || bytes > PhysicalLimit - address ||
            (bar->Flags & (Memory | Io | UpperHalf | Unassigned | Invalid)) != Memory ||
            ((bar->Flags & Width64) == 0 && (address >= 0x100000000UL || bytes > 0x100000000UL - address))) return false;
        if ((bar->Flags & SizeKnown) != 0 && bar->Size != bytes)
        { bar->Flags = (bar->Flags & ~SizeKnown) | Invalid; bar->Size = 0; bar->SizeSource = SourceUnknown; return false; }
        bar->Size = bytes; bar->SizeSource = source; bar->Flags |= SizeKnown;
        return true;
    }

    static uint U32(byte* p) => (uint)p[0] | ((uint)p[1] << 8) | ((uint)p[2] << 16) | ((uint)p[3] << 24);
    static ulong U64(byte* p) => U32(p) | ((ulong)U32(p + 4) << 32);
    static bool Checksum(byte* p, uint bytes)
    {
        uint sum = 0;
        for (uint i = 0; i < bytes; i++) sum += p[i];
        return (sum & 255) == 0;
    }
    internal static bool Covered(NativeBootInfo* boot, ulong address, ulong bytes, bool acpi)
    {
        if (boot == null || boot->MemoryEntries == null || boot->MemoryEntryCount > 4096 ||
            address == 0 || bytes == 0 || address >= PhysicalLimit || bytes > PhysicalLimit - address) return false;
        bool covered = false;
        for (ulong i = 0; i < boot->MemoryEntryCount; i++)
        {
            MemoryMapEntry* entry = boot->MemoryEntries[i];
            if (entry == null || entry->Base > ~0UL - entry->Length) return false;
            bool kind = acpi ? (entry->Kind == 2 || entry->Kind == 3 || entry->Kind == 8) : entry->Kind == 1;
            if (entry->Length != 0 && address < entry->Base + entry->Length && entry->Base < address + bytes && !kind) return false;
            if (kind && address >= entry->Base && address - entry->Base <= entry->Length && bytes <= entry->Length - (address - entry->Base)) covered = true;
        }
        return covered;
    }
    static byte* AcpiPointer(NativeBootInfo* boot, ulong physical, uint bytes)
    {
        if (!Covered(boot, physical, bytes, true) || boot->Hhdm == 0 || boot->Hhdm > ~0UL - physical ||
            bytes - 1 > ~0UL - (boot->Hhdm + physical)) return null;
        return (byte*)(boot->Hhdm + physical);
    }
    static byte* AcpiTable(NativeBootInfo* boot, ulong physical, uint signature)
    {
        byte* header = AcpiPointer(boot, physical, 36);
        if (header == null || U32(header) != signature) return null;
        uint length = U32(header + 4);
        if (length < 36 || length > 65536) return null;
        byte* table = AcpiPointer(boot, physical, length);
        return table != null && Checksum(table, length) ? table : null;
    }
    internal static uint LocateMcfg(NativeBootInfo* boot, byte** result, uint* entries)
    {
        *result = null; *entries = 0;
        if (boot == null || boot->Rsdp == 0) return 0;
        // This kernel requests Limine base revision 6: RSDP is an HHDM pointer,
        // ACPI table links are physical. Do not assume a first-4GiB direct map.
        if (boot->Hhdm == 0 || boot->Rsdp < boot->Hhdm) return 2;
        ulong rsdpPhysical = boot->Rsdp - boot->Hhdm;
        byte* rsdp = AcpiPointer(boot, rsdpPhysical, 20);
        if (rsdp == null || U64(rsdp) != 0x2052545020445352UL || !Checksum(rsdp, 20)) return 2;
        ulong rootPhysical = U32(rsdp + 16); uint stride = 4, signature = 0x54445352;
        if (rsdp[15] >= 2)
        {
            rsdp = AcpiPointer(boot, rsdpPhysical, 36);
            if (rsdp == null) return 2;
            uint length = U32(rsdp + 20);
            if (length < 36 || length > 4096 || AcpiPointer(boot, rsdpPhysical, length) == null || !Checksum(rsdp, length)) return 2;
            if (U64(rsdp + 24) != 0) { rootPhysical = U64(rsdp + 24); stride = 8; signature = 0x54445358; }
        }
        byte* root = AcpiTable(boot, rootPhysical, signature);
        if (root == null) return 2;
        uint payload = U32(root + 4) - 36;
        if ((payload % stride) != 0 || payload / stride > 1024) return 2;
        byte* found = null;
        for (uint offset = 36; offset < payload + 36; offset += stride)
        {
            ulong address = stride == 8 ? U64(root + offset) : U32(root + offset);
            byte* header = AcpiPointer(boot, address, 36);
            if (header == null || U32(header) != 0x4746434d) continue;
            byte* table = AcpiTable(boot, address, 0x4746434d);
            if (found != null || table == null || !ValidateMcfg(table)) return 2;
            found = table;
        }
        if (found == null) return 0;
        *result = found; *entries = (U32(found + 4) - 44) / 16;
        return 1;
    }
    internal static bool ValidateMcfg(byte* table)
    {
        if (table == null) return false;
        uint length = U32(table + 4);
        if (length < 60 || length > 44 + 32 * 16 || (length - 44) % 16 != 0 || U64(table + 36) != 0) return false;
        for (uint offset = 44; offset < length; offset += 16)
        {
            byte* entry = table + offset;
            ulong baseAddress = U64(entry);
            uint start = entry[10], end = entry[11];
            ulong ending = ((ulong)end + 1) << 20;
            if (baseAddress == 0 || (baseAddress & 0xfffff) != 0 || baseAddress >= PhysicalLimit || ending > PhysicalLimit - baseAddress ||
                start > end || U32(entry + 12) != 0) return false;
            uint segment = (uint)entry[8] | ((uint)entry[9] << 8);
            for (uint prior = 44; prior < offset; prior += 16)
            {
                byte* old = table + prior;
                uint oldSegment = (uint)old[8] | ((uint)old[9] << 8);
                if (segment == oldSegment && start <= old[11] && old[10] <= end) return false;
                ulong thisStart = baseAddress + ((ulong)start << 20), oldStart = U64(old) + ((ulong)old[10] << 20);
                ulong thisEnd = baseAddress + ending, oldEnd = U64(old) + (((ulong)old[11] + 1) << 20);
                if (thisStart < oldEnd && oldStart < thisEnd) return false;
            }
        }
        return true;
    }
    internal static bool TryEcamAddress(NativeBootInfo* boot, byte* table, uint entries, uint bus, uint device, uint function, ulong* physical)
    {
        *physical = 0;
        if (table == null || !ValidateMcfg(table) || entries == 0 || entries != (U32(table + 4) - 44) / 16 ||
            bus > 255 || device > 31 || function > 7) return false;
        for (uint i = 0; i < entries; i++)
        {
            byte* entry = table + 44 + i * 16;
            if (entry[8] != 0 || entry[9] != 0 || bus < entry[10] || bus > entry[11]) continue;
            ulong start = U64(entry) + ((ulong)entry[10] << 20), bytes = ((ulong)entry[11] + 1 - entry[10]) << 20;
            // A checksum-valid MCFG alone is not permission to read arbitrary
            // physical memory. Require the complete allocation to be explicitly
            // reserved (not RAM, ACPI data or the GOP framebuffer) by firmware.
            if (!Covered(boot, start, bytes, false)) return false;
            *physical = U64(entry) + ((ulong)bus << 20) + ((ulong)device << 15) + ((ulong)function << 12);
            return true;
        }
        return false;
    }

    static void PrintRecord(uint index, NativeGpuDeviceDiscovery* record)
    {
        Serial.Write("XFE_GPU_DEVICE|Index|"); Serial.Number(index);
        Serial.Write("|Bus|"); Serial.Number(record->Bus); Serial.Write("|Device|"); Serial.Number(record->Device);
        Serial.Write("|Function|"); Serial.Number(record->Function); Serial.Write("|Vendor|"); Serial.Hex(record->VendorId);
        Serial.Write("|DeviceId|"); Serial.Hex(record->DeviceId); Serial.Write("|Class|"); Serial.Hex(record->ClassCode);
        Serial.Write("|Sm120Candidate|"); Serial.Number(record->Flags & Sm120Candidate);
        Serial.Write("|PcieStatus|"); Serial.Number(record->CapabilityStatus); Serial.Write("|ExtendedStatus|"); Serial.Number(record->ExtendedStatus);
        Serial.Write("|RebarStatus|"); Serial.Number(record->RebarStatus); Serial.Write("|Ecam|"); Serial.Hex(record->EcamPhysical); Serial.Line("");
        NativeGpuBarDiscovery* bars = &record->Bar0;
        for (uint i = 0; i < 6; i++)
        {
            Serial.Write("XFE_GPU_BAR|DeviceIndex|"); Serial.Number(index); Serial.Write("|Index|"); Serial.Number(i);
            Serial.Write("|Address|"); Serial.Hex(bars[i].Address); Serial.Write("|Bytes|"); Serial.Number(bars[i].Size);
            Serial.Write("|Flags|"); Serial.Number(bars[i].Flags); Serial.Write("|SizeSource|"); Serial.Number(bars[i].SizeSource);
            Serial.Write("|SizeKnown|"); Serial.Number((bars[i].Flags & SizeKnown) != 0 ? 1UL : 0UL);
            Serial.Line("|MappingDenied|1|Reason|DiscoveryOnly");
        }
    }
    static void PrintSummary()
    {
        Serial.Write("XFE_GPU_DISCOVERY_END|State|"); Serial.Number(_state); Serial.Write("|Devices|"); Serial.Number(_count);
        Serial.Write("|MatchedDevices|"); Serial.Number(_matched); Serial.Write("|Omitted|"); Serial.Number(_matched - _count);
        Serial.Write("|ConfigReads|"); Serial.Number(_configurationReads); Serial.Write("|EcamPageMaps|"); Serial.Number(_ecamMaps);
        Serial.Write("|UnmapFailures|"); Serial.Number(_unmapFailures);
        Serial.Line("|BarMaps|0|BarReads|0|ConfigWrites|0|GpuAcceleration|0|Cuda|0");
    }
}