Horizon: Implement arp:r and arp:w services (#5802)

* Horizon: Implement arp:r and arp:w services

* Fix formatting

* Remove HLE arp services

* Revert "Remove HLE arp services"

This reverts commit c576fcccadb963db56b96bacabd1c1ac7abfb1ab.

* Keep LibHac impl since it's used in bcat

* Addresses gdkchan's feedback

* ArpApi in PrepoIpcServer and remove LmApi

* Fix 2

* Fixes ArpApi init

* Fix encoding

* Update PrepoService.cs

* Fix prepo

19 files changed, 881 insertions, 1 deletions

diff --git a/src/Ryujinx.Horizon/Sdk/Arp/ApplicationCertificate.cs b/src/Ryujinx.Horizon/Sdk/Arp/ApplicationCertificate.cs
new file mode 100644
index 00000000..d60d337d
--- /dev/null
+++ b/src/Ryujinx.Horizon/Sdk/Arp/ApplicationCertificate.cs
@@ -0,0 +1,9 @@
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.Horizon.Sdk.Arp
+{
+    [StructLayout(LayoutKind.Sequential, Size = 0x528)]
+    public struct ApplicationCertificate
+    {
+    }
+}
diff --git a/src/Ryujinx.Horizon/Sdk/Arp/ApplicationKind.cs b/src/Ryujinx.Horizon/Sdk/Arp/ApplicationKind.cs
new file mode 100644
index 00000000..586e6a98
--- /dev/null
+++ b/src/Ryujinx.Horizon/Sdk/Arp/ApplicationKind.cs
@@ -0,0 +1,8 @@
+namespace Ryujinx.Horizon.Sdk.Arp
+{
+    public enum ApplicationKind : byte
+    {
+        Application,
+        MicroApplication,
+    }
+}
diff --git a/src/Ryujinx.Horizon/Sdk/Arp/ApplicationLaunchProperty.cs b/src/Ryujinx.Horizon/Sdk/Arp/ApplicationLaunchProperty.cs
new file mode 100644
index 00000000..00b81832
--- /dev/null
+++ b/src/Ryujinx.Horizon/Sdk/Arp/ApplicationLaunchProperty.cs
@@ -0,0 +1,14 @@
+using Ryujinx.Horizon.Sdk.Ncm;
+
+namespace Ryujinx.Horizon.Sdk.Arp
+{
+    public struct ApplicationLaunchProperty
+    {
+        public ApplicationId ApplicationId;
+        public uint Version;
+        public StorageId Storage;
+        public StorageId PatchStorage;
+        public ApplicationKind ApplicationKind;
+        public byte Padding;
+    }
+}
diff --git a/src/Ryujinx.Horizon/Sdk/Arp/ApplicationProcessProperty.cs b/src/Ryujinx.Horizon/Sdk/Arp/ApplicationProcessProperty.cs
new file mode 100644
index 00000000..13d222a1
--- /dev/null
+++ b/src/Ryujinx.Horizon/Sdk/Arp/ApplicationProcessProperty.cs
@@ -0,0 +1,10 @@
+using Ryujinx.Common.Memory;
+
+namespace Ryujinx.Horizon.Sdk.Arp
+{
+    public struct ApplicationProcessProperty
+    {
+        public byte ProgramIndex;
+        public Array15<byte> Unknown;
+    }
+}
diff --git a/src/Ryujinx.Horizon/Sdk/Arp/ArpApi.cs b/src/Ryujinx.Horizon/Sdk/Arp/ArpApi.cs
new file mode 100644
index 00000000..b0acc006
--- /dev/null
+++ b/src/Ryujinx.Horizon/Sdk/Arp/ArpApi.cs
@@ -0,0 +1,130 @@
+using Ryujinx.Common.Memory;
+using Ryujinx.Horizon.Common;
+using Ryujinx.Horizon.Sdk.Ns;
+using Ryujinx.Horizon.Sdk.Sf.Cmif;
+using Ryujinx.Horizon.Sdk.Sf.Hipc;
+using Ryujinx.Horizon.Sdk.Sm;
+using System;
+using System.Runtime.CompilerServices;
+
+namespace Ryujinx.Horizon.Sdk.Arp
+{
+    class ArpApi : IDisposable
+    {
+        private const string ArpRName = "arp:r";
+
+        private readonly HeapAllocator _allocator;
+        private int _sessionHandle;
+
+        public ArpApi(HeapAllocator allocator)
+        {
+            _allocator = allocator;
+        }
+
+        private void InitializeArpRService()
+        {
+            if (_sessionHandle == 0)
+            {
+                using var smApi = new SmApi();
+
+                smApi.Initialize();
+                smApi.GetServiceHandle(out _sessionHandle, ServiceName.Encode(ArpRName)).AbortOnFailure();
+            }
+        }
+
+        public Result GetApplicationInstanceId(out ulong applicationInstanceId, ulong applicationPid)
+        {
+            Span<byte> data = stackalloc byte[8];
+            SpanWriter writer = new(data);
+
+            writer.Write(applicationPid);
+
+            InitializeArpRService();
+
+            Result result = ServiceUtil.SendRequest(out CmifResponse response, _sessionHandle, 3, sendPid: false, data);
+            if (result.IsFailure)
+            {
+                applicationInstanceId = 0;
+
+                return result;
+            }
+
+            SpanReader reader = new(response.Data);
+
+            applicationInstanceId = reader.Read<ulong>();
+
+            return Result.Success;
+        }
+
+        public Result GetApplicationLaunchProperty(out ApplicationLaunchProperty applicationLaunchProperty, ulong applicationInstanceId)
+        {
+            applicationLaunchProperty = default;
+
+            Span<byte> data = stackalloc byte[8];
+            SpanWriter writer = new(data);
+
+            writer.Write(applicationInstanceId);
+
+            InitializeArpRService();
+
+            Result result = ServiceUtil.SendRequest(out CmifResponse response, _sessionHandle, 0, sendPid: false, data);
+            if (result.IsFailure)
+            {
+                return result;
+            }
+
+            SpanReader reader = new(response.Data);
+
+            applicationLaunchProperty = reader.Read<ApplicationLaunchProperty>();
+
+            return Result.Success;
+        }
+
+        public Result GetApplicationControlProperty(out ApplicationControlProperty applicationControlProperty, ulong applicationInstanceId)
+        {
+            applicationControlProperty = default;
+
+            Span<byte> data = stackalloc byte[8];
+            SpanWriter writer = new(data);
+
+            writer.Write(applicationInstanceId);
+
+            ulong bufferSize = (ulong)Unsafe.SizeOf<ApplicationControlProperty>();
+            ulong bufferAddress = _allocator.Allocate(bufferSize);
+
+            InitializeArpRService();
+
+            Result result = ServiceUtil.SendRequest(
+                out CmifResponse response,
+                _sessionHandle,
+                1,
+                sendPid: false,
+                data,
+                stackalloc[] { HipcBufferFlags.Out | HipcBufferFlags.MapAlias | HipcBufferFlags.FixedSize },
+                stackalloc[] { new PointerAndSize(bufferAddress, bufferSize) });
+
+            if (result.IsFailure)
+            {
+                return result;
+            }
+
+            applicationControlProperty = HorizonStatic.AddressSpace.Read<ApplicationControlProperty>(bufferAddress);
+
+            _allocator.Free(bufferAddress, bufferSize);
+
+            return Result.Success;
+        }
+
+        public void Dispose()
+        {
+            if (_sessionHandle != 0)
+            {
+                HorizonStatic.Syscall.CloseHandle(_sessionHandle);
+
+                _sessionHandle = 0;
+            }
+
+            GC.SuppressFinalize(this);
+        }
+    }
+}
diff --git a/src/Ryujinx.Horizon/Sdk/Arp/ArpResult.cs b/src/Ryujinx.Horizon/Sdk/Arp/ArpResult.cs
new file mode 100644
index 00000000..5de07871
--- /dev/null
+++ b/src/Ryujinx.Horizon/Sdk/Arp/ArpResult.cs
@@ -0,0 +1,17 @@
+using Ryujinx.Horizon.Common;
+
+namespace Ryujinx.Horizon.Sdk.Arp
+{
+    static class ArpResult
+    {
+        private const int ModuleId = 157;
+
+        public static Result InvalidArgument => new(ModuleId, 30);
+        public static Result InvalidPid => new(ModuleId, 31);
+        public static Result InvalidPointer => new(ModuleId, 32);
+        public static Result DataAlreadyBound => new(ModuleId, 42);
+        public static Result AllocationFailed => new(ModuleId, 63);
+        public static Result NoFreeInstance => new(ModuleId, 101);
+        public static Result InvalidInstanceId => new(ModuleId, 102);
+    }
+}
diff --git a/src/Ryujinx.Horizon/Sdk/Arp/Detail/ApplicationInstance.cs b/src/Ryujinx.Horizon/Sdk/Arp/Detail/ApplicationInstance.cs
new file mode 100644
index 00000000..5eb0ab18
--- /dev/null
+++ b/src/Ryujinx.Horizon/Sdk/Arp/Detail/ApplicationInstance.cs
@@ -0,0 +1,13 @@
+using Ryujinx.Horizon.Sdk.Ns;
+
+namespace Ryujinx.Horizon.Sdk.Arp.Detail
+{
+    class ApplicationInstance
+    {
+        public ulong Pid { get; set; }
+        public ApplicationLaunchProperty? LaunchProperty { get; set; }
+        public ApplicationProcessProperty? ProcessProperty { get; set; }
+        public ApplicationControlProperty? ControlProperty { get; set; }
+        public ApplicationCertificate? Certificate { get; set; }
+    }
+}
diff --git a/src/Ryujinx.Horizon/Sdk/Arp/Detail/ApplicationInstanceManager.cs b/src/Ryujinx.Horizon/Sdk/Arp/Detail/ApplicationInstanceManager.cs
new file mode 100644
index 00000000..18c993ce
--- /dev/null
+++ b/src/Ryujinx.Horizon/Sdk/Arp/Detail/ApplicationInstanceManager.cs
@@ -0,0 +1,31 @@
+using Ryujinx.Horizon.Sdk.OsTypes;
+using System;
+using System.Threading;
+
+namespace Ryujinx.Horizon.Sdk.Arp.Detail
+{
+    class ApplicationInstanceManager : IDisposable
+    {
+        private int _disposalState;
+
+        public SystemEventType SystemEvent;
+        public int EventHandle;
+
+        public readonly ApplicationInstance[] Entries = new ApplicationInstance[2];
+
+        public ApplicationInstanceManager()
+        {
+            Os.CreateSystemEvent(out SystemEvent, EventClearMode.ManualClear, true).AbortOnFailure();
+
+            EventHandle = Os.GetReadableHandleOfSystemEvent(ref SystemEvent);
+        }
+
+        public void Dispose()
+        {
+            if (EventHandle != 0 && Interlocked.Exchange(ref _disposalState, 1) == 0)
+            {
+                Os.DestroySystemEvent(ref SystemEvent);
+            }
+        }
+    }
+}
diff --git a/src/Ryujinx.Horizon/Sdk/Arp/IReader.cs b/src/Ryujinx.Horizon/Sdk/Arp/IReader.cs
new file mode 100644
index 00000000..ef78f7fd
--- /dev/null
+++ b/src/Ryujinx.Horizon/Sdk/Arp/IReader.cs
@@ -0,0 +1,18 @@
+using Ryujinx.Horizon.Common;
+using Ryujinx.Horizon.Sdk.Ns;
+using System;
+
+namespace Ryujinx.Horizon.Sdk.Arp
+{
+    public interface IReader
+    {
+        public Result GetApplicationLaunchProperty(out ApplicationLaunchProperty applicationLaunchProperty, ulong applicationInstanceId);
+        public Result GetApplicationControlProperty(out ApplicationControlProperty applicationControlProperty, ulong applicationInstanceId);
+        public Result GetApplicationProcessProperty(out ApplicationProcessProperty applicationControlProperty, ulong applicationInstanceId);
+        public Result GetApplicationInstanceId(out ulong applicationInstanceId, ulong pid);
+        public Result GetApplicationInstanceUnregistrationNotifier(out IUnregistrationNotifier unregistrationNotifier);
+        public Result ListApplicationInstanceId(out int count, Span<ulong> applicationInstanceIdList);
+        public Result GetMicroApplicationInstanceId(out ulong MicroApplicationInstanceId, ulong pid);
+        public Result GetApplicationCertificate(out ApplicationCertificate applicationCertificate, ulong applicationInstanceId);
+    }
+}
diff --git a/src/Ryujinx.Horizon/Sdk/Arp/IRegistrar.cs b/src/Ryujinx.Horizon/Sdk/Arp/IRegistrar.cs
new file mode 100644
index 00000000..467f3dbd
--- /dev/null
+++ b/src/Ryujinx.Horizon/Sdk/Arp/IRegistrar.cs
@@ -0,0 +1,12 @@
+using Ryujinx.Horizon.Common;
+using Ryujinx.Horizon.Sdk.Ns;
+
+namespace Ryujinx.Horizon.Sdk.Arp
+{
+    public interface IRegistrar
+    {
+        public Result Issue(out ulong applicationInstanceId);
+        public Result SetApplicationLaunchProperty(ApplicationLaunchProperty applicationLaunchProperty);
+        public Result SetApplicationControlProperty(in ApplicationControlProperty applicationControlProperty);
+    }
+}
diff --git a/src/Ryujinx.Horizon/Sdk/Arp/IUnregistrationNotifier.cs b/src/Ryujinx.Horizon/Sdk/Arp/IUnregistrationNotifier.cs
new file mode 100644
index 00000000..24b9807d
--- /dev/null
+++ b/src/Ryujinx.Horizon/Sdk/Arp/IUnregistrationNotifier.cs
@@ -0,0 +1,9 @@
+using Ryujinx.Horizon.Common;
+
+namespace Ryujinx.Horizon.Sdk.Arp
+{
+    public interface IUnregistrationNotifier
+    {
+        public Result GetReadableHandle(out int readableHandle);
+    }
+}
diff --git a/src/Ryujinx.Horizon/Sdk/Arp/IUpdater.cs b/src/Ryujinx.Horizon/Sdk/Arp/IUpdater.cs
new file mode 100644
index 00000000..f9beeb69
--- /dev/null
+++ b/src/Ryujinx.Horizon/Sdk/Arp/IUpdater.cs
@@ -0,0 +1,12 @@
+using Ryujinx.Horizon.Common;
+
+namespace Ryujinx.Horizon.Sdk.Arp
+{
+    public interface IUpdater
+    {
+        public Result Issue();
+        public Result SetApplicationProcessProperty(ulong pid, ApplicationProcessProperty applicationProcessProperty);
+        public Result DeleteApplicationProcessProperty();
+        public Result SetApplicationCertificate(ApplicationCertificate applicationCertificate);
+    }
+}
diff --git a/src/Ryujinx.Horizon/Sdk/Arp/IWriter.cs b/src/Ryujinx.Horizon/Sdk/Arp/IWriter.cs
new file mode 100644
index 00000000..b3e000e1
--- /dev/null
+++ b/src/Ryujinx.Horizon/Sdk/Arp/IWriter.cs
@@ -0,0 +1,12 @@
+using Ryujinx.Horizon.Common;
+
+namespace Ryujinx.Horizon.Sdk.Arp
+{
+    public interface IWriter
+    {
+        public Result AcquireRegistrar(out IRegistrar registrar);
+        public Result UnregisterApplicationInstance(ulong applicationInstanceId);
+        public Result AcquireApplicationProcessPropertyUpdater(out IUpdater updater, ulong applicationInstanceId);
+        public Result AcquireApplicationCertificateUpdater(out IUpdater updater, ulong applicationInstanceId);
+    }
+}
diff --git a/src/Ryujinx.Horizon/Sdk/Ncm/ApplicationId.cs b/src/Ryujinx.Horizon/Sdk/Ncm/ApplicationId.cs
index 4c5e76e6..24b7d9ca 100644
--- a/src/Ryujinx.Horizon/Sdk/Ncm/ApplicationId.cs
+++ b/src/Ryujinx.Horizon/Sdk/Ncm/ApplicationId.cs
@@ -1,6 +1,6 @@
 namespace Ryujinx.Horizon.Sdk.Ncm
 {
-    readonly struct ApplicationId
+    public readonly struct ApplicationId
     {
         public readonly ulong Id;
 
diff --git a/src/Ryujinx.Horizon/Sdk/Ncm/StorageId.cs b/src/Ryujinx.Horizon/Sdk/Ncm/StorageId.cs
new file mode 100644
index 00000000..e2fb3250
--- /dev/null
+++ b/src/Ryujinx.Horizon/Sdk/Ncm/StorageId.cs
@@ -0,0 +1,13 @@
+namespace Ryujinx.Horizon.Sdk.Ncm
+{
+    public enum StorageId : byte
+    {
+        None,
+        Host,
+        GameCard,
+        BuiltInSystem,
+        BuiltInUser,
+        SdCard,
+        Any,
+    }
+}
diff --git a/src/Ryujinx.Horizon/Sdk/Ns/ApplicationControlProperty.cs b/src/Ryujinx.Horizon/Sdk/Ns/ApplicationControlProperty.cs
new file mode 100644
index 00000000..12c19168
--- /dev/null
+++ b/src/Ryujinx.Horizon/Sdk/Ns/ApplicationControlProperty.cs
@@ -0,0 +1,309 @@
+using Ryujinx.Common.Memory;
+using Ryujinx.Horizon.Sdk.Arp.Detail;
+using System;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using System.Text;
+
+namespace Ryujinx.Horizon.Sdk.Ns
+{
+    public struct ApplicationControlProperty
+    {
+        public Array16<ApplicationTitle> Title;
+        public Array37<byte> Isbn;
+        public StartupUserAccountValue StartupUserAccount;
+        public UserAccountSwitchLockValue UserAccountSwitchLock;
+        public AddOnContentRegistrationTypeValue AddOnContentRegistrationType;
+        public AttributeFlagValue AttributeFlag;
+        public uint SupportedLanguageFlag;
+        public ParentalControlFlagValue ParentalControlFlag;
+        public ScreenshotValue Screenshot;
+        public VideoCaptureValue VideoCapture;
+        public DataLossConfirmationValue DataLossConfirmation;
+        public PlayLogPolicyValue PlayLogPolicy;
+        public ulong PresenceGroupId;
+        public Array32<sbyte> RatingAge;
+        public Array16<byte> DisplayVersion;
+        public ulong AddOnContentBaseId;
+        public ulong SaveDataOwnerId;
+        public long UserAccountSaveDataSize;
+        public long UserAccountSaveDataJournalSize;
+        public long DeviceSaveDataSize;
+        public long DeviceSaveDataJournalSize;
+        public long BcatDeliveryCacheStorageSize;
+        public Array8<byte> ApplicationErrorCodeCategory;
+        public Array8<ulong> LocalCommunicationId;
+        public LogoTypeValue LogoType;
+        public LogoHandlingValue LogoHandling;
+        public RuntimeAddOnContentInstallValue RuntimeAddOnContentInstall;
+        public RuntimeParameterDeliveryValue RuntimeParameterDelivery;
+        public Array2<byte> Reserved30F4;
+        public CrashReportValue CrashReport;
+        public HdcpValue Hdcp;
+        public ulong SeedForPseudoDeviceId;
+        public Array65<byte> BcatPassphrase;
+        public StartupUserAccountOptionFlagValue StartupUserAccountOption;
+        public Array6<byte> ReservedForUserAccountSaveDataOperation;
+        public long UserAccountSaveDataSizeMax;
+        public long UserAccountSaveDataJournalSizeMax;
+        public long DeviceSaveDataSizeMax;
+        public long DeviceSaveDataJournalSizeMax;
+        public long TemporaryStorageSize;
+        public long CacheStorageSize;
+        public long CacheStorageJournalSize;
+        public long CacheStorageDataAndJournalSizeMax;
+        public ushort CacheStorageIndexMax;
+        public byte Reserved318A;
+        public byte RuntimeUpgrade;
+        public uint SupportingLimitedLicenses;
+        public Array16<ulong> PlayLogQueryableApplicationId;
+        public PlayLogQueryCapabilityValue PlayLogQueryCapability;
+        public RepairFlagValue RepairFlag;
+        public byte ProgramIndex;
+        public RequiredNetworkServiceLicenseOnLaunchValue RequiredNetworkServiceLicenseOnLaunchFlag;
+        public Array4<byte> Reserved3214;
+        public ApplicationNeighborDetectionClientConfiguration NeighborDetectionClientConfiguration;
+        public ApplicationJitConfiguration JitConfiguration;
+        public RequiredAddOnContentsSetBinaryDescriptor RequiredAddOnContentsSetBinaryDescriptors;
+        public PlayReportPermissionValue PlayReportPermission;
+        public CrashScreenshotForProdValue CrashScreenshotForProd;
+        public CrashScreenshotForDevValue CrashScreenshotForDev;
+        public byte ContentsAvailabilityTransitionPolicy;
+        public Array4<byte> Reserved3404;
+        public AccessibleLaunchRequiredVersionValue AccessibleLaunchRequiredVersion;
+        public ByteArray3000 Reserved3448;
+
+        public readonly string IsbnString => Encoding.UTF8.GetString(Isbn.AsSpan()).TrimEnd('\0');
+        public readonly string DisplayVersionString => Encoding.UTF8.GetString(DisplayVersion.AsSpan()).TrimEnd('\0');
+        public readonly string ApplicationErrorCodeCategoryString => Encoding.UTF8.GetString(ApplicationErrorCodeCategory.AsSpan()).TrimEnd('\0');
+        public readonly string BcatPassphraseString => Encoding.UTF8.GetString(BcatPassphrase.AsSpan()).TrimEnd('\0');
+
+        public struct ApplicationTitle
+        {
+            public ByteArray512 Name;
+            public Array256<byte> Publisher;
+
+            public readonly string NameString => Encoding.UTF8.GetString(Name.AsSpan()).TrimEnd('\0');
+            public readonly string PublisherString => Encoding.UTF8.GetString(Publisher.AsSpan()).TrimEnd('\0');
+        }
+
+        public struct ApplicationNeighborDetectionClientConfiguration
+        {
+            public ApplicationNeighborDetectionGroupConfiguration SendGroupConfiguration;
+            public Array16<ApplicationNeighborDetectionGroupConfiguration> ReceivableGroupConfigurations;
+        }
+
+        public struct ApplicationNeighborDetectionGroupConfiguration
+        {
+            public ulong GroupId;
+            public Array16<byte> Key;
+        }
+
+        public struct ApplicationJitConfiguration
+        {
+            public JitConfigurationFlag Flags;
+            public long MemorySize;
+        }
+
+        public struct RequiredAddOnContentsSetBinaryDescriptor
+        {
+            public Array32<ushort> Descriptors;
+        }
+
+        public struct AccessibleLaunchRequiredVersionValue
+        {
+            public Array8<ulong> ApplicationId;
+        }
+
+        public enum Language
+        {
+            AmericanEnglish = 0,
+            BritishEnglish = 1,
+            Japanese = 2,
+            French = 3,
+            German = 4,
+            LatinAmericanSpanish = 5,
+            Spanish = 6,
+            Italian = 7,
+            Dutch = 8,
+            CanadianFrench = 9,
+            Portuguese = 10,
+            Russian = 11,
+            Korean = 12,
+            TraditionalChinese = 13,
+            SimplifiedChinese = 14,
+            BrazilianPortuguese = 15,
+        }
+
+        public enum Organization
+        {
+            CERO = 0,
+            GRACGCRB = 1,
+            GSRMR = 2,
+            ESRB = 3,
+            ClassInd = 4,
+            USK = 5,
+            PEGI = 6,
+            PEGIPortugal = 7,
+            PEGIBBFC = 8,
+            Russian = 9,
+            ACB = 10,
+            OFLC = 11,
+            IARCGeneric = 12,
+        }
+
+        public enum StartupUserAccountValue : byte
+        {
+            None = 0,
+            Required = 1,
+            RequiredWithNetworkServiceAccountAvailable = 2,
+        }
+
+        public enum UserAccountSwitchLockValue : byte
+        {
+            Disable = 0,
+            Enable = 1,
+        }
+
+        public enum AddOnContentRegistrationTypeValue : byte
+        {
+            AllOnLaunch = 0,
+            OnDemand = 1,
+        }
+
+        [Flags]
+        public enum AttributeFlagValue
+        {
+            None = 0,
+            Demo = 1 << 0,
+            RetailInteractiveDisplay = 1 << 1,
+        }
+
+        public enum ParentalControlFlagValue
+        {
+            None = 0,
+            FreeCommunication = 1,
+        }
+
+        public enum ScreenshotValue : byte
+        {
+            Allow = 0,
+            Deny = 1,
+        }
+
+        public enum VideoCaptureValue : byte
+        {
+            Disable = 0,
+            Manual = 1,
+            Enable = 2,
+        }
+
+        public enum DataLossConfirmationValue : byte
+        {
+            None = 0,
+            Required = 1,
+        }
+
+        public enum PlayLogPolicyValue : byte
+        {
+            Open = 0,
+            LogOnly = 1,
+            None = 2,
+            Closed = 3,
+            All = Open,
+        }
+
+        public enum LogoTypeValue : byte
+        {
+            LicensedByNintendo = 0,
+            DistributedByNintendo = 1,
+            Nintendo = 2,
+        }
+
+        public enum LogoHandlingValue : byte
+        {
+            Auto = 0,
+            Manual = 1,
+        }
+
+        public enum RuntimeAddOnContentInstallValue : byte
+        {
+            Deny = 0,
+            AllowAppend = 1,
+            AllowAppendButDontDownloadWhenUsingNetwork = 2,
+        }
+
+        public enum RuntimeParameterDeliveryValue : byte
+        {
+            Always = 0,
+            AlwaysIfUserStateMatched = 1,
+            OnRestart = 2,
+        }
+
+        public enum CrashReportValue : byte
+        {
+            Deny = 0,
+            Allow = 1,
+        }
+
+        public enum HdcpValue : byte
+        {
+            None = 0,
+            Required = 1,
+        }
+
+        [Flags]
+        public enum StartupUserAccountOptionFlagValue : byte
+        {
+            None = 0,
+            IsOptional = 1 << 0,
+        }
+
+        public enum PlayLogQueryCapabilityValue : byte
+        {
+            None = 0,
+            WhiteList = 1,
+            All = 2,
+        }
+
+        [Flags]
+        public enum RepairFlagValue : byte
+        {
+            None = 0,
+            SuppressGameCardAccess = 1 << 0,
+        }
+
+        [Flags]
+        public enum RequiredNetworkServiceLicenseOnLaunchValue : byte
+        {
+            None = 0,
+            Common = 1 << 0,
+        }
+
+        [Flags]
+        public enum JitConfigurationFlag : ulong
+        {
+            None = 0,
+            Enabled = 1 << 0,
+        }
+
+        [Flags]
+        public enum PlayReportPermissionValue : byte
+        {
+            None = 0,
+            TargetMarketing = 1 << 0,
+        }
+
+        public enum CrashScreenshotForProdValue : byte
+        {
+            Deny = 0,
+            Allow = 1,
+        }
+
+        public enum CrashScreenshotForDevValue : byte
+        {
+            Deny = 0,
+            Allow = 1,
+        }
+    }
+}
diff --git a/src/Ryujinx.Horizon/Sdk/ServiceUtil.cs b/src/Ryujinx.Horizon/Sdk/ServiceUtil.cs
index ccd6c93a..5527c1e3 100644
--- a/src/Ryujinx.Horizon/Sdk/ServiceUtil.cs
+++ b/src/Ryujinx.Horizon/Sdk/ServiceUtil.cs
@@ -35,5 +35,254 @@ namespace Ryujinx.Horizon.Sdk
 
             return CmifMessage.ParseResponse(out response, HorizonStatic.AddressSpace.GetWritableRegion(tlsAddress, tlsSize).Memory.Span, false, 0);
         }
+
+        public static Result SendRequest(
+            out CmifResponse response,
+            int sessionHandle,
+            uint requestId,
+            bool sendPid,
+            scoped ReadOnlySpan<byte> data,
+            ReadOnlySpan<HipcBufferFlags> bufferFlags,
+            ReadOnlySpan<PointerAndSize> buffers)
+        {
+            ulong tlsAddress = HorizonStatic.ThreadContext.TlsAddress;
+            int tlsSize = Api.TlsMessageBufferSize;
+
+            using (var tlsRegion = HorizonStatic.AddressSpace.GetWritableRegion(tlsAddress, tlsSize))
+            {
+                CmifRequestFormat format = new()
+                {
+                    DataSize = data.Length,
+                    RequestId = requestId,
+                    SendPid = sendPid,
+                };
+
+                for (int index = 0; index < bufferFlags.Length; index++)
+                {
+                    FormatProcessBuffer(ref format, bufferFlags[index]);
+                }
+
+                CmifRequest request = CmifMessage.CreateRequest(tlsRegion.Memory.Span, format);
+
+                for (int index = 0; index < buffers.Length; index++)
+                {
+                    RequestProcessBuffer(ref request, buffers[index], bufferFlags[index]);
+                }
+
+                data.CopyTo(request.Data);
+            }
+
+            Result result = HorizonStatic.Syscall.SendSyncRequest(sessionHandle);
+
+            if (result.IsFailure)
+            {
+                response = default;
+
+                return result;
+            }
+
+            return CmifMessage.ParseResponse(out response, HorizonStatic.AddressSpace.GetWritableRegion(tlsAddress, tlsSize).Memory.Span, false, 0);
+        }
+
+        private static void FormatProcessBuffer(ref CmifRequestFormat format, HipcBufferFlags flags)
+        {
+            if (flags == 0)
+            {
+                return;
+            }
+
+            bool isIn = flags.HasFlag(HipcBufferFlags.In);
+            bool isOut = flags.HasFlag(HipcBufferFlags.Out);
+
+            if (flags.HasFlag(HipcBufferFlags.AutoSelect))
+            {
+                if (isIn)
+                {
+                    format.InAutoBuffersCount++;
+                }
+
+                if (isOut)
+                {
+                    format.OutAutoBuffersCount++;
+                }
+            }
+            else if (flags.HasFlag(HipcBufferFlags.Pointer))
+            {
+                if (isIn)
+                {
+                    format.InPointersCount++;
+                }
+
+                if (isOut)
+                {
+                    if (flags.HasFlag(HipcBufferFlags.FixedSize))
+                    {
+                        format.OutFixedPointersCount++;
+                    }
+                    else
+                    {
+                        format.OutPointersCount++;
+                    }
+                }
+            }
+            else if (flags.HasFlag(HipcBufferFlags.MapAlias))
+            {
+                if (isIn && isOut)
+                {
+                    format.InOutBuffersCount++;
+                }
+                else if (isIn)
+                {
+                    format.InBuffersCount++;
+                }
+                else
+                {
+                    format.OutBuffersCount++;
+                }
+            }
+        }
+
+        private static void RequestProcessBuffer(ref CmifRequest request, PointerAndSize buffer, HipcBufferFlags flags)
+        {
+            if (flags == 0)
+            {
+                return;
+            }
+
+            bool isIn = flags.HasFlag(HipcBufferFlags.In);
+            bool isOut = flags.HasFlag(HipcBufferFlags.Out);
+
+            if (flags.HasFlag(HipcBufferFlags.AutoSelect))
+            {
+                HipcBufferMode mode = HipcBufferMode.Normal;
+
+                if (flags.HasFlag(HipcBufferFlags.MapTransferAllowsNonSecure))
+                {
+                    mode = HipcBufferMode.NonSecure;
+                }
+
+                if (flags.HasFlag(HipcBufferFlags.MapTransferAllowsNonDevice))
+                {
+                    mode = HipcBufferMode.NonDevice;
+                }
+
+                if (isIn)
+                {
+                    RequestInAutoBuffer(ref request, buffer.Address, buffer.Size, mode);
+                }
+
+                if (isOut)
+                {
+                    RequestOutAutoBuffer(ref request, buffer.Address, buffer.Size, mode);
+                }
+            }
+            else if (flags.HasFlag(HipcBufferFlags.Pointer))
+            {
+                if (isIn)
+                {
+                    RequestInPointer(ref request, buffer.Address, buffer.Size);
+                }
+
+                if (isOut)
+                {
+                    if (flags.HasFlag(HipcBufferFlags.FixedSize))
+                    {
+                        RequestOutFixedPointer(ref request, buffer.Address, buffer.Size);
+                    }
+                    else
+                    {
+                        RequestOutPointer(ref request, buffer.Address, buffer.Size);
+                    }
+                }
+            }
+            else if (flags.HasFlag(HipcBufferFlags.MapAlias))
+            {
+                HipcBufferMode mode = HipcBufferMode.Normal;
+
+                if (flags.HasFlag(HipcBufferFlags.MapTransferAllowsNonSecure))
+                {
+                    mode = HipcBufferMode.NonSecure;
+                }
+
+                if (flags.HasFlag(HipcBufferFlags.MapTransferAllowsNonDevice))
+                {
+                    mode = HipcBufferMode.NonDevice;
+                }
+
+                if (isIn && isOut)
+                {
+                    RequestInOutBuffer(ref request, buffer.Address, buffer.Size, mode);
+                }
+                else if (isIn)
+                {
+                    RequestInBuffer(ref request, buffer.Address, buffer.Size, mode);
+                }
+                else
+                {
+                    RequestOutBuffer(ref request, buffer.Address, buffer.Size, mode);
+                }
+            }
+        }
+
+        private static void RequestInAutoBuffer(ref CmifRequest request, ulong bufferAddress, ulong bufferSize, HipcBufferMode mode)
+        {
+            if (request.ServerPointerSize != 0 && bufferSize <= (ulong)request.ServerPointerSize)
+            {
+                RequestInPointer(ref request, bufferAddress, bufferSize);
+                RequestInBuffer(ref request, 0UL, 0UL, mode);
+            }
+            else
+            {
+                RequestInPointer(ref request, 0UL, 0UL);
+                RequestInBuffer(ref request, bufferAddress, bufferSize, mode);
+            }
+        }
+
+        private static void RequestOutAutoBuffer(ref CmifRequest request, ulong bufferAddress, ulong bufferSize, HipcBufferMode mode)
+        {
+            if (request.ServerPointerSize != 0 && bufferSize <= (ulong)request.ServerPointerSize)
+            {
+                RequestOutPointer(ref request, bufferAddress, bufferSize);
+                RequestOutBuffer(ref request, 0UL, 0UL, mode);
+            }
+            else
+            {
+                RequestOutPointer(ref request, 0UL, 0UL);
+                RequestOutBuffer(ref request, bufferAddress, bufferSize, mode);
+            }
+        }
+
+        private static void RequestInBuffer(ref CmifRequest request, ulong bufferAddress, ulong bufferSize, HipcBufferMode mode)
+        {
+            request.Hipc.SendBuffers[request.SendBufferIndex++] = new HipcBufferDescriptor(bufferAddress, bufferSize, mode);
+        }
+
+        private static void RequestOutBuffer(ref CmifRequest request, ulong bufferAddress, ulong bufferSize, HipcBufferMode mode)
+        {
+            request.Hipc.ReceiveBuffers[request.RecvBufferIndex++] = new HipcBufferDescriptor(bufferAddress, bufferSize, mode);
+        }
+
+        private static void RequestInOutBuffer(ref CmifRequest request, ulong bufferAddress, ulong bufferSize, HipcBufferMode mode)
+        {
+            request.Hipc.ExchangeBuffers[request.ExchBufferIndex++] = new HipcBufferDescriptor(bufferAddress, bufferSize, mode);
+        }
+
+        private static void RequestInPointer(ref CmifRequest request, ulong bufferAddress, ulong bufferSize)
+        {
+            request.Hipc.SendStatics[request.SendStaticIndex++] = new HipcStaticDescriptor(bufferAddress, (ushort)bufferSize, request.CurrentInPointerId++);
+            request.ServerPointerSize -= (int)bufferSize;
+        }
+
+        private static void RequestOutFixedPointer(ref CmifRequest request, ulong bufferAddress, ulong bufferSize)
+        {
+            request.Hipc.ReceiveList[request.RecvListIndex++] = new HipcReceiveListEntry(bufferAddress, (ushort)bufferSize);
+            request.ServerPointerSize -= (int)bufferSize;
+        }
+
+        private static void RequestOutPointer(ref CmifRequest request, ulong bufferAddress, ulong bufferSize)
+        {
+            RequestOutFixedPointer(ref request, bufferAddress, bufferSize);
+            request.OutPointerSizes[request.OutPointerSizeIndex++] = (ushort)bufferSize;
+        }
     }
 }
diff --git a/src/Ryujinx.Horizon/Sdk/Sf/Cmif/CmifRequest.cs b/src/Ryujinx.Horizon/Sdk/Sf/Cmif/CmifRequest.cs
index d409be5b..62c15baa 100644
--- a/src/Ryujinx.Horizon/Sdk/Sf/Cmif/CmifRequest.cs
+++ b/src/Ryujinx.Horizon/Sdk/Sf/Cmif/CmifRequest.cs
@@ -10,5 +10,12 @@ namespace Ryujinx.Horizon.Sdk.Sf.Cmif
         public Span<ushort> OutPointerSizes;
         public Span<uint> Objects;
         public int ServerPointerSize;
+        public int CurrentInPointerId;
+        public int SendBufferIndex;
+        public int RecvBufferIndex;
+        public int ExchBufferIndex;
+        public int SendStaticIndex;
+        public int RecvListIndex;
+        public int OutPointerSizeIndex;
     }
 }
diff --git a/src/Ryujinx.Horizon/Sdk/Sf/Hipc/HipcBufferDescriptor.cs b/src/Ryujinx.Horizon/Sdk/Sf/Hipc/HipcBufferDescriptor.cs
index 03ef6d3f..4e962894 100644
--- a/src/Ryujinx.Horizon/Sdk/Sf/Hipc/HipcBufferDescriptor.cs
+++ b/src/Ryujinx.Horizon/Sdk/Sf/Hipc/HipcBufferDescriptor.cs
@@ -11,5 +11,12 @@ namespace Ryujinx.Horizon.Sdk.Sf.Hipc
         public ulong Address => _addressLow | (((ulong)_word2 << 4) & 0xf00000000UL) | (((ulong)_word2 << 34) & 0x7000000000UL);
         public ulong Size => _sizeLow | ((ulong)_word2 << 8) & 0xf00000000UL;
         public HipcBufferMode Mode => (HipcBufferMode)(_word2 & 3);
+
+        public HipcBufferDescriptor(ulong address, ulong size, HipcBufferMode mode)
+        {
+            _sizeLow = (uint)size;
+            _addressLow = (uint)address;
+            _word2 = (uint)mode | ((uint)(address >> 34) & 0x1c) | ((uint)(size >> 32) << 24) | ((uint)(address >> 4) & 0xf0000000);
+        }
     }
 }