early-access version 1255

src/core/hle/service/am/am.h

@@ -0,0 +1,332 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <chrono>
+#include <memory>
+#include <queue>
+#include "core/hle/kernel/writable_event.h"
+#include "core/hle/service/service.h"
+
+namespace Kernel {
+class KernelCore;
+class TransferMemory;
+} // namespace Kernel
+
+namespace Service::NVFlinger {
+class NVFlinger;
+}
+
+namespace Service::AM {
+
+enum SystemLanguage {
+    Japanese = 0,
+    English = 1, // en-US
+    French = 2,
+    German = 3,
+    Italian = 4,
+    Spanish = 5,
+    Chinese = 6,
+    Korean = 7,
+    Dutch = 8,
+    Portuguese = 9,
+    Russian = 10,
+    Taiwanese = 11,
+    BritishEnglish = 12, // en-GB
+    CanadianFrench = 13,
+    LatinAmericanSpanish = 14, // es-419
+    // 4.0.0+
+    SimplifiedChinese = 15,
+    TraditionalChinese = 16,
+};
+
+class AppletMessageQueue {
+public:
+    enum class AppletMessage : u32 {
+        NoMessage = 0,
+        ExitRequested = 4,
+        FocusStateChanged = 15,
+        OperationModeChanged = 30,
+        PerformanceModeChanged = 31,
+    };
+
+    explicit AppletMessageQueue(Kernel::KernelCore& kernel);
+    ~AppletMessageQueue();
+
+    const std::shared_ptr<Kernel::ReadableEvent>& GetMesssageRecieveEvent() const;
+    const std::shared_ptr<Kernel::ReadableEvent>& GetOperationModeChangedEvent() const;
+    void PushMessage(AppletMessage msg);
+    AppletMessage PopMessage();
+    std::size_t GetMessageCount() const;
+    void OperationModeChanged();
+    void RequestExit();
+
+private:
+    std::queue<AppletMessage> messages;
+    Kernel::EventPair on_new_message;
+    Kernel::EventPair on_operation_mode_changed;
+};
+
+class IWindowController final : public ServiceFramework<IWindowController> {
+public:
+    explicit IWindowController(Core::System& system_);
+    ~IWindowController() override;
+
+private:
+    void GetAppletResourceUserId(Kernel::HLERequestContext& ctx);
+    void AcquireForegroundRights(Kernel::HLERequestContext& ctx);
+};
+
+class IAudioController final : public ServiceFramework<IAudioController> {
+public:
+    explicit IAudioController(Core::System& system_);
+    ~IAudioController() override;
+
+private:
+    void SetExpectedMasterVolume(Kernel::HLERequestContext& ctx);
+    void GetMainAppletExpectedMasterVolume(Kernel::HLERequestContext& ctx);
+    void GetLibraryAppletExpectedMasterVolume(Kernel::HLERequestContext& ctx);
+    void ChangeMainAppletMasterVolume(Kernel::HLERequestContext& ctx);
+    void SetTransparentAudioRate(Kernel::HLERequestContext& ctx);
+
+    static constexpr float min_allowed_volume = 0.0f;
+    static constexpr float max_allowed_volume = 1.0f;
+
+    float main_applet_volume{0.25f};
+    float library_applet_volume{max_allowed_volume};
+    float transparent_volume_rate{min_allowed_volume};
+
+    // Volume transition fade time in nanoseconds.
+    // e.g. If the main applet volume was 0% and was changed to 50%
+    //      with a fade of 50ns, then over the course of 50ns,
+    //      the volume will gradually fade up to 50%
+    std::chrono::nanoseconds fade_time_ns{0};
+};
+
+class IDisplayController final : public ServiceFramework<IDisplayController> {
+public:
+    explicit IDisplayController(Core::System& system_);
+    ~IDisplayController() override;
+};
+
+class IDebugFunctions final : public ServiceFramework<IDebugFunctions> {
+public:
+    explicit IDebugFunctions(Core::System& system_);
+    ~IDebugFunctions() override;
+};
+
+class ISelfController final : public ServiceFramework<ISelfController> {
+public:
+    explicit ISelfController(Core::System& system_, NVFlinger::NVFlinger& nvflinger_);
+    ~ISelfController() override;
+
+private:
+    void Exit(Kernel::HLERequestContext& ctx);
+    void LockExit(Kernel::HLERequestContext& ctx);
+    void UnlockExit(Kernel::HLERequestContext& ctx);
+    void EnterFatalSection(Kernel::HLERequestContext& ctx);
+    void LeaveFatalSection(Kernel::HLERequestContext& ctx);
+    void GetLibraryAppletLaunchableEvent(Kernel::HLERequestContext& ctx);
+    void SetScreenShotPermission(Kernel::HLERequestContext& ctx);
+    void SetOperationModeChangedNotification(Kernel::HLERequestContext& ctx);
+    void SetPerformanceModeChangedNotification(Kernel::HLERequestContext& ctx);
+    void SetFocusHandlingMode(Kernel::HLERequestContext& ctx);
+    void SetRestartMessageEnabled(Kernel::HLERequestContext& ctx);
+    void SetOutOfFocusSuspendingEnabled(Kernel::HLERequestContext& ctx);
+    void SetAlbumImageOrientation(Kernel::HLERequestContext& ctx);
+    void CreateManagedDisplayLayer(Kernel::HLERequestContext& ctx);
+    void CreateManagedDisplaySeparableLayer(Kernel::HLERequestContext& ctx);
+    void SetHandlesRequestToDisplay(Kernel::HLERequestContext& ctx);
+    void SetIdleTimeDetectionExtension(Kernel::HLERequestContext& ctx);
+    void GetIdleTimeDetectionExtension(Kernel::HLERequestContext& ctx);
+    void SetAutoSleepDisabled(Kernel::HLERequestContext& ctx);
+    void IsAutoSleepDisabled(Kernel::HLERequestContext& ctx);
+    void GetAccumulatedSuspendedTickValue(Kernel::HLERequestContext& ctx);
+    void GetAccumulatedSuspendedTickChangedEvent(Kernel::HLERequestContext& ctx);
+
+    enum class ScreenshotPermission : u32 {
+        Inherit = 0,
+        Enable = 1,
+        Disable = 2,
+    };
+
+    NVFlinger::NVFlinger& nvflinger;
+    Kernel::EventPair launchable_event;
+    Kernel::EventPair accumulated_suspended_tick_changed_event;
+
+    u32 idle_time_detection_extension = 0;
+    u64 num_fatal_sections_entered = 0;
+    bool is_auto_sleep_disabled = false;
+    ScreenshotPermission screenshot_permission = ScreenshotPermission::Inherit;
+};
+
+class ICommonStateGetter final : public ServiceFramework<ICommonStateGetter> {
+public:
+    explicit ICommonStateGetter(Core::System& system_,
+                                std::shared_ptr<AppletMessageQueue> msg_queue_);
+    ~ICommonStateGetter() override;
+
+private:
+    enum class FocusState : u8 {
+        InFocus = 1,
+        NotInFocus = 2,
+    };
+
+    enum class OperationMode : u8 {
+        Handheld = 0,
+        Docked = 1,
+    };
+
+    void GetEventHandle(Kernel::HLERequestContext& ctx);
+    void ReceiveMessage(Kernel::HLERequestContext& ctx);
+    void GetCurrentFocusState(Kernel::HLERequestContext& ctx);
+    void GetDefaultDisplayResolutionChangeEvent(Kernel::HLERequestContext& ctx);
+    void GetOperationMode(Kernel::HLERequestContext& ctx);
+    void GetPerformanceMode(Kernel::HLERequestContext& ctx);
+    void GetBootMode(Kernel::HLERequestContext& ctx);
+    void IsVrModeEnabled(Kernel::HLERequestContext& ctx);
+    void SetVrModeEnabled(Kernel::HLERequestContext& ctx);
+    void SetLcdBacklighOffEnabled(Kernel::HLERequestContext& ctx);
+    void EndVrModeEx(Kernel::HLERequestContext& ctx);
+    void GetDefaultDisplayResolution(Kernel::HLERequestContext& ctx);
+    void SetCpuBoostMode(Kernel::HLERequestContext& ctx);
+
+    std::shared_ptr<AppletMessageQueue> msg_queue;
+    bool vr_mode_state{};
+};
+
+class IStorageImpl {
+public:
+    virtual ~IStorageImpl();
+    virtual std::vector<u8>& GetData() = 0;
+    virtual const std::vector<u8>& GetData() const = 0;
+    virtual std::size_t GetSize() const = 0;
+};
+
+class IStorage final : public ServiceFramework<IStorage> {
+public:
+    explicit IStorage(Core::System& system_, std::vector<u8>&& buffer);
+    ~IStorage() override;
+
+    std::vector<u8>& GetData() {
+        return impl->GetData();
+    }
+
+    const std::vector<u8>& GetData() const {
+        return impl->GetData();
+    }
+
+    std::size_t GetSize() const {
+        return impl->GetSize();
+    }
+
+private:
+    void Register();
+    void Open(Kernel::HLERequestContext& ctx);
+
+    std::shared_ptr<IStorageImpl> impl;
+};
+
+class IStorageAccessor final : public ServiceFramework<IStorageAccessor> {
+public:
+    explicit IStorageAccessor(Core::System& system_, IStorage& backing_);
+    ~IStorageAccessor() override;
+
+private:
+    void GetSize(Kernel::HLERequestContext& ctx);
+    void Write(Kernel::HLERequestContext& ctx);
+    void Read(Kernel::HLERequestContext& ctx);
+
+    IStorage& backing;
+};
+
+class ILibraryAppletCreator final : public ServiceFramework<ILibraryAppletCreator> {
+public:
+    explicit ILibraryAppletCreator(Core::System& system_);
+    ~ILibraryAppletCreator() override;
+
+private:
+    void CreateLibraryApplet(Kernel::HLERequestContext& ctx);
+    void CreateStorage(Kernel::HLERequestContext& ctx);
+    void CreateTransferMemoryStorage(Kernel::HLERequestContext& ctx);
+};
+
+class IApplicationFunctions final : public ServiceFramework<IApplicationFunctions> {
+public:
+    explicit IApplicationFunctions(Core::System& system_);
+    ~IApplicationFunctions() override;
+
+private:
+    void PopLaunchParameter(Kernel::HLERequestContext& ctx);
+    void CreateApplicationAndRequestToStartForQuest(Kernel::HLERequestContext& ctx);
+    void EnsureSaveData(Kernel::HLERequestContext& ctx);
+    void SetTerminateResult(Kernel::HLERequestContext& ctx);
+    void GetDisplayVersion(Kernel::HLERequestContext& ctx);
+    void GetDesiredLanguage(Kernel::HLERequestContext& ctx);
+    void InitializeGamePlayRecording(Kernel::HLERequestContext& ctx);
+    void SetGamePlayRecordingState(Kernel::HLERequestContext& ctx);
+    void NotifyRunning(Kernel::HLERequestContext& ctx);
+    void GetPseudoDeviceId(Kernel::HLERequestContext& ctx);
+    void ExtendSaveData(Kernel::HLERequestContext& ctx);
+    void GetSaveDataSize(Kernel::HLERequestContext& ctx);
+    void BeginBlockingHomeButtonShortAndLongPressed(Kernel::HLERequestContext& ctx);
+    void EndBlockingHomeButtonShortAndLongPressed(Kernel::HLERequestContext& ctx);
+    void BeginBlockingHomeButton(Kernel::HLERequestContext& ctx);
+    void EndBlockingHomeButton(Kernel::HLERequestContext& ctx);
+    void EnableApplicationCrashReport(Kernel::HLERequestContext& ctx);
+    void InitializeApplicationCopyrightFrameBuffer(Kernel::HLERequestContext& ctx);
+    void SetApplicationCopyrightImage(Kernel::HLERequestContext& ctx);
+    void SetApplicationCopyrightVisibility(Kernel::HLERequestContext& ctx);
+    void QueryApplicationPlayStatistics(Kernel::HLERequestContext& ctx);
+    void QueryApplicationPlayStatisticsByUid(Kernel::HLERequestContext& ctx);
+    void ExecuteProgram(Kernel::HLERequestContext& ctx);
+    void ClearUserChannel(Kernel::HLERequestContext& ctx);
+    void UnpopToUserChannel(Kernel::HLERequestContext& ctx);
+    void GetPreviousProgramIndex(Kernel::HLERequestContext& ctx);
+    void GetGpuErrorDetectedSystemEvent(Kernel::HLERequestContext& ctx);
+    void GetFriendInvitationStorageChannelEvent(Kernel::HLERequestContext& ctx);
+
+    bool launch_popped_application_specific = false;
+    bool launch_popped_account_preselect = false;
+    s32 previous_program_index{-1};
+    Kernel::EventPair gpu_error_detected_event;
+    Kernel::EventPair friend_invitation_storage_channel_event;
+};
+
+class IHomeMenuFunctions final : public ServiceFramework<IHomeMenuFunctions> {
+public:
+    explicit IHomeMenuFunctions(Core::System& system_);
+    ~IHomeMenuFunctions() override;
+
+private:
+    void RequestToGetForeground(Kernel::HLERequestContext& ctx);
+    void GetPopFromGeneralChannelEvent(Kernel::HLERequestContext& ctx);
+
+    Kernel::EventPair pop_from_general_channel_event;
+};
+
+class IGlobalStateController final : public ServiceFramework<IGlobalStateController> {
+public:
+    explicit IGlobalStateController(Core::System& system_);
+    ~IGlobalStateController() override;
+};
+
+class IApplicationCreator final : public ServiceFramework<IApplicationCreator> {
+public:
+    explicit IApplicationCreator(Core::System& system_);
+    ~IApplicationCreator() override;
+};
+
+class IProcessWindingController final : public ServiceFramework<IProcessWindingController> {
+public:
+    explicit IProcessWindingController(Core::System& system_);
+    ~IProcessWindingController() override;
+};
+
+/// Registers all AM services with the specified service manager.
+void InstallInterfaces(SM::ServiceManager& service_manager, NVFlinger::NVFlinger& nvflinger,
+                       Core::System& system);
+
+} // namespace Service::AM

src/core/hle/service/am/applet_ae.cpp

@@ -0,0 +1,278 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/logging/log.h"
+#include "core/core.h"
+#include "core/hle/ipc_helpers.h"
+#include "core/hle/service/am/am.h"
+#include "core/hle/service/am/applet_ae.h"
+#include "core/hle/service/nvflinger/nvflinger.h"
+
+namespace Service::AM {
+
+class ILibraryAppletProxy final : public ServiceFramework<ILibraryAppletProxy> {
+public:
+    explicit ILibraryAppletProxy(NVFlinger::NVFlinger& nvflinger_,
+                                 std::shared_ptr<AppletMessageQueue> msg_queue_,
+                                 Core::System& system_)
+        : ServiceFramework{system_, "ILibraryAppletProxy"}, nvflinger{nvflinger_},
+          msg_queue{std::move(msg_queue_)} {
+        // clang-format off
+        static const FunctionInfo functions[] = {
+            {0, &ILibraryAppletProxy::GetCommonStateGetter, "GetCommonStateGetter"},
+            {1, &ILibraryAppletProxy::GetSelfController, "GetSelfController"},
+            {2, &ILibraryAppletProxy::GetWindowController, "GetWindowController"},
+            {3, &ILibraryAppletProxy::GetAudioController, "GetAudioController"},
+            {4, &ILibraryAppletProxy::GetDisplayController, "GetDisplayController"},
+            {10, &ILibraryAppletProxy::GetProcessWindingController, "GetProcessWindingController"},
+            {11, &ILibraryAppletProxy::GetLibraryAppletCreator, "GetLibraryAppletCreator"},
+            {20, &ILibraryAppletProxy::GetApplicationFunctions, "GetApplicationFunctions"},
+            {21, nullptr, "GetAppletCommonFunctions"},
+            {1000, &ILibraryAppletProxy::GetDebugFunctions, "GetDebugFunctions"},
+        };
+        // clang-format on
+
+        RegisterHandlers(functions);
+    }
+
+private:
+    void GetCommonStateGetter(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_AM, "called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushIpcInterface<ICommonStateGetter>(system, msg_queue);
+    }
+
+    void GetSelfController(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_AM, "called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushIpcInterface<ISelfController>(system, nvflinger);
+    }
+
+    void GetWindowController(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_AM, "called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushIpcInterface<IWindowController>(system);
+    }
+
+    void GetAudioController(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_AM, "called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushIpcInterface<IAudioController>(system);
+    }
+
+    void GetDisplayController(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_AM, "called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushIpcInterface<IDisplayController>(system);
+    }
+
+    void GetProcessWindingController(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_AM, "called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushIpcInterface<IProcessWindingController>(system);
+    }
+
+    void GetDebugFunctions(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_AM, "called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushIpcInterface<IDebugFunctions>(system);
+    }
+
+    void GetLibraryAppletCreator(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_AM, "called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushIpcInterface<ILibraryAppletCreator>(system);
+    }
+
+    void GetApplicationFunctions(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_AM, "called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushIpcInterface<IApplicationFunctions>(system);
+    }
+
+    NVFlinger::NVFlinger& nvflinger;
+    std::shared_ptr<AppletMessageQueue> msg_queue;
+};
+
+class ISystemAppletProxy final : public ServiceFramework<ISystemAppletProxy> {
+public:
+    explicit ISystemAppletProxy(NVFlinger::NVFlinger& nvflinger_,
+                                std::shared_ptr<AppletMessageQueue> msg_queue_,
+                                Core::System& system_)
+        : ServiceFramework{system_, "ISystemAppletProxy"}, nvflinger{nvflinger_},
+          msg_queue{std::move(msg_queue_)} {
+        // clang-format off
+        static const FunctionInfo functions[] = {
+            {0, &ISystemAppletProxy::GetCommonStateGetter, "GetCommonStateGetter"},
+            {1, &ISystemAppletProxy::GetSelfController, "GetSelfController"},
+            {2, &ISystemAppletProxy::GetWindowController, "GetWindowController"},
+            {3, &ISystemAppletProxy::GetAudioController, "GetAudioController"},
+            {4, &ISystemAppletProxy::GetDisplayController, "GetDisplayController"},
+            {10, nullptr, "GetProcessWindingController"},
+            {11, &ISystemAppletProxy::GetLibraryAppletCreator, "GetLibraryAppletCreator"},
+            {20, &ISystemAppletProxy::GetHomeMenuFunctions, "GetHomeMenuFunctions"},
+            {21, &ISystemAppletProxy::GetGlobalStateController, "GetGlobalStateController"},
+            {22, &ISystemAppletProxy::GetApplicationCreator, "GetApplicationCreator"},
+            {23, nullptr, "GetAppletCommonFunctions"},
+            {1000, &ISystemAppletProxy::GetDebugFunctions, "GetDebugFunctions"},
+        };
+        // clang-format on
+
+        RegisterHandlers(functions);
+    }
+
+private:
+    void GetCommonStateGetter(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_AM, "called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushIpcInterface<ICommonStateGetter>(system, msg_queue);
+    }
+
+    void GetSelfController(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_AM, "called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushIpcInterface<ISelfController>(system, nvflinger);
+    }
+
+    void GetWindowController(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_AM, "called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushIpcInterface<IWindowController>(system);
+    }
+
+    void GetAudioController(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_AM, "called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushIpcInterface<IAudioController>(system);
+    }
+
+    void GetDisplayController(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_AM, "called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushIpcInterface<IDisplayController>(system);
+    }
+
+    void GetDebugFunctions(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_AM, "called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushIpcInterface<IDebugFunctions>(system);
+    }
+
+    void GetLibraryAppletCreator(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_AM, "called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushIpcInterface<ILibraryAppletCreator>(system);
+    }
+
+    void GetHomeMenuFunctions(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_AM, "called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushIpcInterface<IHomeMenuFunctions>(system);
+    }
+
+    void GetGlobalStateController(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_AM, "called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushIpcInterface<IGlobalStateController>(system);
+    }
+
+    void GetApplicationCreator(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_AM, "called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushIpcInterface<IApplicationCreator>(system);
+    }
+
+    NVFlinger::NVFlinger& nvflinger;
+    std::shared_ptr<AppletMessageQueue> msg_queue;
+};
+
+void AppletAE::OpenSystemAppletProxy(Kernel::HLERequestContext& ctx) {
+    LOG_DEBUG(Service_AM, "called");
+
+    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+    rb.Push(RESULT_SUCCESS);
+    rb.PushIpcInterface<ISystemAppletProxy>(nvflinger, msg_queue, system);
+}
+
+void AppletAE::OpenLibraryAppletProxy(Kernel::HLERequestContext& ctx) {
+    LOG_DEBUG(Service_AM, "called");
+
+    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+    rb.Push(RESULT_SUCCESS);
+    rb.PushIpcInterface<ILibraryAppletProxy>(nvflinger, msg_queue, system);
+}
+
+void AppletAE::OpenLibraryAppletProxyOld(Kernel::HLERequestContext& ctx) {
+    LOG_DEBUG(Service_AM, "called");
+
+    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+    rb.Push(RESULT_SUCCESS);
+    rb.PushIpcInterface<ILibraryAppletProxy>(nvflinger, msg_queue, system);
+}
+
+AppletAE::AppletAE(NVFlinger::NVFlinger& nvflinger_, std::shared_ptr<AppletMessageQueue> msg_queue_,
+                   Core::System& system_)
+    : ServiceFramework{system_, "appletAE"}, nvflinger{nvflinger_}, msg_queue{
+                                                                        std::move(msg_queue_)} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {100, &AppletAE::OpenSystemAppletProxy, "OpenSystemAppletProxy"},
+        {200, &AppletAE::OpenLibraryAppletProxyOld, "OpenLibraryAppletProxyOld"},
+        {201, &AppletAE::OpenLibraryAppletProxy, "OpenLibraryAppletProxy"},
+        {300, nullptr, "OpenOverlayAppletProxy"},
+        {350, nullptr, "OpenSystemApplicationProxy"},
+        {400, nullptr, "CreateSelfLibraryAppletCreatorForDevelop"},
+        {410, nullptr, "GetSystemAppletControllerForDebug"},
+        {1000, nullptr, "GetDebugFunctions"},
+    };
+    // clang-format on
+
+    RegisterHandlers(functions);
+}
+
+AppletAE::~AppletAE() = default;
+
+const std::shared_ptr<AppletMessageQueue>& AppletAE::GetMessageQueue() const {
+    return msg_queue;
+}
+
+} // namespace Service::AM

src/core/hle/service/am/applet_ae.h

@@ -0,0 +1,42 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include "core/hle/kernel/hle_ipc.h"
+#include "core/hle/service/service.h"
+
+namespace Service {
+namespace FileSystem {
+class FileSystemController;
+}
+
+namespace NVFlinger {
+class NVFlinger;
+}
+
+namespace AM {
+
+class AppletMessageQueue;
+
+class AppletAE final : public ServiceFramework<AppletAE> {
+public:
+    explicit AppletAE(NVFlinger::NVFlinger& nvflinger_,
+                      std::shared_ptr<AppletMessageQueue> msg_queue_, Core::System& system_);
+    ~AppletAE() override;
+
+    const std::shared_ptr<AppletMessageQueue>& GetMessageQueue() const;
+
+private:
+    void OpenSystemAppletProxy(Kernel::HLERequestContext& ctx);
+    void OpenLibraryAppletProxy(Kernel::HLERequestContext& ctx);
+    void OpenLibraryAppletProxyOld(Kernel::HLERequestContext& ctx);
+
+    NVFlinger::NVFlinger& nvflinger;
+    std::shared_ptr<AppletMessageQueue> msg_queue;
+};
+
+} // namespace AM
+} // namespace Service

src/core/hle/service/am/applet_oe.cpp

@@ -0,0 +1,130 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/logging/log.h"
+#include "core/hle/ipc_helpers.h"
+#include "core/hle/service/am/am.h"
+#include "core/hle/service/am/applet_oe.h"
+#include "core/hle/service/nvflinger/nvflinger.h"
+
+namespace Service::AM {
+
+class IApplicationProxy final : public ServiceFramework<IApplicationProxy> {
+public:
+    explicit IApplicationProxy(NVFlinger::NVFlinger& nvflinger_,
+                               std::shared_ptr<AppletMessageQueue> msg_queue_,
+                               Core::System& system_)
+        : ServiceFramework{system_, "IApplicationProxy"}, nvflinger{nvflinger_},
+          msg_queue{std::move(msg_queue_)} {
+        // clang-format off
+        static const FunctionInfo functions[] = {
+            {0, &IApplicationProxy::GetCommonStateGetter, "GetCommonStateGetter"},
+            {1, &IApplicationProxy::GetSelfController, "GetSelfController"},
+            {2, &IApplicationProxy::GetWindowController, "GetWindowController"},
+            {3, &IApplicationProxy::GetAudioController, "GetAudioController"},
+            {4, &IApplicationProxy::GetDisplayController, "GetDisplayController"},
+            {10, nullptr, "GetProcessWindingController"},
+            {11, &IApplicationProxy::GetLibraryAppletCreator, "GetLibraryAppletCreator"},
+            {20, &IApplicationProxy::GetApplicationFunctions, "GetApplicationFunctions"},
+            {1000, &IApplicationProxy::GetDebugFunctions, "GetDebugFunctions"},
+        };
+        // clang-format on
+
+        RegisterHandlers(functions);
+    }
+
+private:
+    void GetAudioController(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_AM, "called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushIpcInterface<IAudioController>(system);
+    }
+
+    void GetDisplayController(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_AM, "called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushIpcInterface<IDisplayController>(system);
+    }
+
+    void GetDebugFunctions(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_AM, "called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushIpcInterface<IDebugFunctions>(system);
+    }
+
+    void GetWindowController(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_AM, "called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushIpcInterface<IWindowController>(system);
+    }
+
+    void GetSelfController(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_AM, "called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushIpcInterface<ISelfController>(system, nvflinger);
+    }
+
+    void GetCommonStateGetter(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_AM, "called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushIpcInterface<ICommonStateGetter>(system, msg_queue);
+    }
+
+    void GetLibraryAppletCreator(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_AM, "called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushIpcInterface<ILibraryAppletCreator>(system);
+    }
+
+    void GetApplicationFunctions(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_AM, "called");
+
+        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+        rb.Push(RESULT_SUCCESS);
+        rb.PushIpcInterface<IApplicationFunctions>(system);
+    }
+
+    NVFlinger::NVFlinger& nvflinger;
+    std::shared_ptr<AppletMessageQueue> msg_queue;
+};
+
+void AppletOE::OpenApplicationProxy(Kernel::HLERequestContext& ctx) {
+    LOG_DEBUG(Service_AM, "called");
+
+    IPC::ResponseBuilder rb{ctx, 2, 0, 1};
+    rb.Push(RESULT_SUCCESS);
+    rb.PushIpcInterface<IApplicationProxy>(nvflinger, msg_queue, system);
+}
+
+AppletOE::AppletOE(NVFlinger::NVFlinger& nvflinger_, std::shared_ptr<AppletMessageQueue> msg_queue_,
+                   Core::System& system_)
+    : ServiceFramework{system_, "appletOE"}, nvflinger{nvflinger_}, msg_queue{
+                                                                        std::move(msg_queue_)} {
+    static const FunctionInfo functions[] = {
+        {0, &AppletOE::OpenApplicationProxy, "OpenApplicationProxy"},
+    };
+    RegisterHandlers(functions);
+}
+
+AppletOE::~AppletOE() = default;
+
+const std::shared_ptr<AppletMessageQueue>& AppletOE::GetMessageQueue() const {
+    return msg_queue;
+}
+
+} // namespace Service::AM

src/core/hle/service/am/applet_oe.h

@@ -0,0 +1,40 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include "core/hle/kernel/hle_ipc.h"
+#include "core/hle/service/service.h"
+
+namespace Service {
+namespace FileSystem {
+class FileSystemController;
+}
+
+namespace NVFlinger {
+class NVFlinger;
+}
+
+namespace AM {
+
+class AppletMessageQueue;
+
+class AppletOE final : public ServiceFramework<AppletOE> {
+public:
+    explicit AppletOE(NVFlinger::NVFlinger& nvflinger_,
+                      std::shared_ptr<AppletMessageQueue> msg_queue_, Core::System& system_);
+    ~AppletOE() override;
+
+    const std::shared_ptr<AppletMessageQueue>& GetMessageQueue() const;
+
+private:
+    void OpenApplicationProxy(Kernel::HLERequestContext& ctx);
+
+    NVFlinger::NVFlinger& nvflinger;
+    std::shared_ptr<AppletMessageQueue> msg_queue;
+};
+
+} // namespace AM
+} // namespace Service

src/core/hle/service/am/applets/applets.cpp

@@ -0,0 +1,268 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <cstring>
+#include "common/assert.h"
+#include "core/core.h"
+#include "core/frontend/applets/controller.h"
+#include "core/frontend/applets/error.h"
+#include "core/frontend/applets/general_frontend.h"
+#include "core/frontend/applets/profile_select.h"
+#include "core/frontend/applets/software_keyboard.h"
+#include "core/frontend/applets/web_browser.h"
+#include "core/hle/kernel/readable_event.h"
+#include "core/hle/kernel/server_session.h"
+#include "core/hle/kernel/writable_event.h"
+#include "core/hle/service/am/am.h"
+#include "core/hle/service/am/applets/applets.h"
+#include "core/hle/service/am/applets/controller.h"
+#include "core/hle/service/am/applets/error.h"
+#include "core/hle/service/am/applets/general_backend.h"
+#include "core/hle/service/am/applets/profile_select.h"
+#include "core/hle/service/am/applets/software_keyboard.h"
+#include "core/hle/service/am/applets/web_browser.h"
+
+namespace Service::AM::Applets {
+
+AppletDataBroker::AppletDataBroker(Kernel::KernelCore& kernel) {
+    state_changed_event =
+        Kernel::WritableEvent::CreateEventPair(kernel, "ILibraryAppletAccessor:StateChangedEvent");
+    pop_out_data_event =
+        Kernel::WritableEvent::CreateEventPair(kernel, "ILibraryAppletAccessor:PopDataOutEvent");
+    pop_interactive_out_data_event = Kernel::WritableEvent::CreateEventPair(
+        kernel, "ILibraryAppletAccessor:PopInteractiveDataOutEvent");
+}
+
+AppletDataBroker::~AppletDataBroker() = default;
+
+AppletDataBroker::RawChannelData AppletDataBroker::PeekDataToAppletForDebug() const {
+    std::vector<std::vector<u8>> out_normal;
+
+    for (const auto& storage : in_channel) {
+        out_normal.push_back(storage->GetData());
+    }
+
+    std::vector<std::vector<u8>> out_interactive;
+
+    for (const auto& storage : in_interactive_channel) {
+        out_interactive.push_back(storage->GetData());
+    }
+
+    return {std::move(out_normal), std::move(out_interactive)};
+}
+
+std::shared_ptr<IStorage> AppletDataBroker::PopNormalDataToGame() {
+    if (out_channel.empty())
+        return nullptr;
+
+    auto out = std::move(out_channel.front());
+    out_channel.pop_front();
+    pop_out_data_event.writable->Clear();
+    return out;
+}
+
+std::shared_ptr<IStorage> AppletDataBroker::PopNormalDataToApplet() {
+    if (in_channel.empty())
+        return nullptr;
+
+    auto out = std::move(in_channel.front());
+    in_channel.pop_front();
+    return out;
+}
+
+std::shared_ptr<IStorage> AppletDataBroker::PopInteractiveDataToGame() {
+    if (out_interactive_channel.empty())
+        return nullptr;
+
+    auto out = std::move(out_interactive_channel.front());
+    out_interactive_channel.pop_front();
+    pop_interactive_out_data_event.writable->Clear();
+    return out;
+}
+
+std::shared_ptr<IStorage> AppletDataBroker::PopInteractiveDataToApplet() {
+    if (in_interactive_channel.empty())
+        return nullptr;
+
+    auto out = std::move(in_interactive_channel.front());
+    in_interactive_channel.pop_front();
+    return out;
+}
+
+void AppletDataBroker::PushNormalDataFromGame(std::shared_ptr<IStorage>&& storage) {
+    in_channel.emplace_back(std::move(storage));
+}
+
+void AppletDataBroker::PushNormalDataFromApplet(std::shared_ptr<IStorage>&& storage) {
+    out_channel.emplace_back(std::move(storage));
+    pop_out_data_event.writable->Signal();
+}
+
+void AppletDataBroker::PushInteractiveDataFromGame(std::shared_ptr<IStorage>&& storage) {
+    in_interactive_channel.emplace_back(std::move(storage));
+}
+
+void AppletDataBroker::PushInteractiveDataFromApplet(std::shared_ptr<IStorage>&& storage) {
+    out_interactive_channel.emplace_back(std::move(storage));
+    pop_interactive_out_data_event.writable->Signal();
+}
+
+void AppletDataBroker::SignalStateChanged() const {
+    state_changed_event.writable->Signal();
+}
+
+std::shared_ptr<Kernel::ReadableEvent> AppletDataBroker::GetNormalDataEvent() const {
+    return pop_out_data_event.readable;
+}
+
+std::shared_ptr<Kernel::ReadableEvent> AppletDataBroker::GetInteractiveDataEvent() const {
+    return pop_interactive_out_data_event.readable;
+}
+
+std::shared_ptr<Kernel::ReadableEvent> AppletDataBroker::GetStateChangedEvent() const {
+    return state_changed_event.readable;
+}
+
+Applet::Applet(Kernel::KernelCore& kernel_) : broker{kernel_} {}
+
+Applet::~Applet() = default;
+
+void Applet::Initialize() {
+    const auto common = broker.PopNormalDataToApplet();
+    ASSERT(common != nullptr);
+
+    const auto common_data = common->GetData();
+
+    ASSERT(common_data.size() >= sizeof(CommonArguments));
+    std::memcpy(&common_args, common_data.data(), sizeof(CommonArguments));
+
+    initialized = true;
+}
+
+AppletFrontendSet::AppletFrontendSet() = default;
+
+AppletFrontendSet::AppletFrontendSet(ControllerApplet controller_applet, ErrorApplet error_applet,
+                                     ParentalControlsApplet parental_controls_applet,
+                                     PhotoViewer photo_viewer_, ProfileSelect profile_select_,
+                                     SoftwareKeyboard software_keyboard_, WebBrowser web_browser_)
+    : controller{std::move(controller_applet)}, error{std::move(error_applet)},
+      parental_controls{std::move(parental_controls_applet)},
+      photo_viewer{std::move(photo_viewer_)}, profile_select{std::move(profile_select_)},
+      software_keyboard{std::move(software_keyboard_)}, web_browser{std::move(web_browser_)} {}
+
+AppletFrontendSet::~AppletFrontendSet() = default;
+
+AppletFrontendSet::AppletFrontendSet(AppletFrontendSet&&) noexcept = default;
+
+AppletFrontendSet& AppletFrontendSet::operator=(AppletFrontendSet&&) noexcept = default;
+
+AppletManager::AppletManager(Core::System& system_) : system{system_} {}
+
+AppletManager::~AppletManager() = default;
+
+const AppletFrontendSet& AppletManager::GetAppletFrontendSet() const {
+    return frontend;
+}
+
+void AppletManager::SetAppletFrontendSet(AppletFrontendSet set) {
+    if (set.controller != nullptr) {
+        frontend.controller = std::move(set.controller);
+    }
+
+    if (set.error != nullptr) {
+        frontend.error = std::move(set.error);
+    }
+
+    if (set.parental_controls != nullptr) {
+        frontend.parental_controls = std::move(set.parental_controls);
+    }
+
+    if (set.photo_viewer != nullptr) {
+        frontend.photo_viewer = std::move(set.photo_viewer);
+    }
+
+    if (set.profile_select != nullptr) {
+        frontend.profile_select = std::move(set.profile_select);
+    }
+
+    if (set.software_keyboard != nullptr) {
+        frontend.software_keyboard = std::move(set.software_keyboard);
+    }
+
+    if (set.web_browser != nullptr) {
+        frontend.web_browser = std::move(set.web_browser);
+    }
+}
+
+void AppletManager::SetDefaultAppletFrontendSet() {
+    ClearAll();
+    SetDefaultAppletsIfMissing();
+}
+
+void AppletManager::SetDefaultAppletsIfMissing() {
+    if (frontend.controller == nullptr) {
+        frontend.controller =
+            std::make_unique<Core::Frontend::DefaultControllerApplet>(system.ServiceManager());
+    }
+
+    if (frontend.error == nullptr) {
+        frontend.error = std::make_unique<Core::Frontend::DefaultErrorApplet>();
+    }
+
+    if (frontend.parental_controls == nullptr) {
+        frontend.parental_controls =
+            std::make_unique<Core::Frontend::DefaultParentalControlsApplet>();
+    }
+
+    if (frontend.photo_viewer == nullptr) {
+        frontend.photo_viewer = std::make_unique<Core::Frontend::DefaultPhotoViewerApplet>();
+    }
+
+    if (frontend.profile_select == nullptr) {
+        frontend.profile_select = std::make_unique<Core::Frontend::DefaultProfileSelectApplet>();
+    }
+
+    if (frontend.software_keyboard == nullptr) {
+        frontend.software_keyboard =
+            std::make_unique<Core::Frontend::DefaultSoftwareKeyboardApplet>();
+    }
+
+    if (frontend.web_browser == nullptr) {
+        frontend.web_browser = std::make_unique<Core::Frontend::DefaultWebBrowserApplet>();
+    }
+}
+
+void AppletManager::ClearAll() {
+    frontend = {};
+}
+
+std::shared_ptr<Applet> AppletManager::GetApplet(AppletId id) const {
+    switch (id) {
+    case AppletId::Auth:
+        return std::make_shared<Auth>(system, *frontend.parental_controls);
+    case AppletId::Controller:
+        return std::make_shared<Controller>(system, *frontend.controller);
+    case AppletId::Error:
+        return std::make_shared<Error>(system, *frontend.error);
+    case AppletId::ProfileSelect:
+        return std::make_shared<ProfileSelect>(system, *frontend.profile_select);
+    case AppletId::SoftwareKeyboard:
+        return std::make_shared<SoftwareKeyboard>(system, *frontend.software_keyboard);
+    case AppletId::Web:
+    case AppletId::Shop:
+    case AppletId::OfflineWeb:
+    case AppletId::LoginShare:
+    case AppletId::WebAuth:
+        return std::make_shared<WebBrowser>(system, *frontend.web_browser);
+    case AppletId::PhotoViewer:
+        return std::make_shared<PhotoViewer>(system, *frontend.photo_viewer);
+    default:
+        UNIMPLEMENTED_MSG(
+            "No backend implementation exists for applet_id={:02X}! Falling back to stub applet.",
+            static_cast<u8>(id));
+        return std::make_shared<StubApplet>(system, id);
+    }
+}
+
+} // namespace Service::AM::Applets

src/core/hle/service/am/applets/applets.h

@@ -0,0 +1,209 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include <queue>
+#include "common/swap.h"
+#include "core/hle/kernel/object.h"
+#include "core/hle/kernel/writable_event.h"
+
+union ResultCode;
+
+namespace Core {
+class System;
+}
+
+namespace Core::Frontend {
+class ControllerApplet;
+class ECommerceApplet;
+class ErrorApplet;
+class ParentalControlsApplet;
+class PhotoViewerApplet;
+class ProfileSelectApplet;
+class SoftwareKeyboardApplet;
+class WebBrowserApplet;
+} // namespace Core::Frontend
+
+namespace Kernel {
+class KernelCore;
+}
+
+namespace Service::AM {
+
+class IStorage;
+
+namespace Applets {
+
+enum class AppletId : u32 {
+    OverlayDisplay = 0x02,
+    QLaunch = 0x03,
+    Starter = 0x04,
+    Auth = 0x0A,
+    Cabinet = 0x0B,
+    Controller = 0x0C,
+    DataErase = 0x0D,
+    Error = 0x0E,
+    NetConnect = 0x0F,
+    ProfileSelect = 0x10,
+    SoftwareKeyboard = 0x11,
+    MiiEdit = 0x12,
+    Web = 0x13,
+    Shop = 0x14,
+    PhotoViewer = 0x15,
+    Settings = 0x16,
+    OfflineWeb = 0x17,
+    LoginShare = 0x18,
+    WebAuth = 0x19,
+    MyPage = 0x1A,
+};
+
+class AppletDataBroker final {
+public:
+    explicit AppletDataBroker(Kernel::KernelCore& kernel_);
+    ~AppletDataBroker();
+
+    struct RawChannelData {
+        std::vector<std::vector<u8>> normal;
+        std::vector<std::vector<u8>> interactive;
+    };
+
+    // Retrieves but does not pop the data sent to applet.
+    RawChannelData PeekDataToAppletForDebug() const;
+
+    std::shared_ptr<IStorage> PopNormalDataToGame();
+    std::shared_ptr<IStorage> PopNormalDataToApplet();
+
+    std::shared_ptr<IStorage> PopInteractiveDataToGame();
+    std::shared_ptr<IStorage> PopInteractiveDataToApplet();
+
+    void PushNormalDataFromGame(std::shared_ptr<IStorage>&& storage);
+    void PushNormalDataFromApplet(std::shared_ptr<IStorage>&& storage);
+
+    void PushInteractiveDataFromGame(std::shared_ptr<IStorage>&& storage);
+    void PushInteractiveDataFromApplet(std::shared_ptr<IStorage>&& storage);
+
+    void SignalStateChanged() const;
+
+    std::shared_ptr<Kernel::ReadableEvent> GetNormalDataEvent() const;
+    std::shared_ptr<Kernel::ReadableEvent> GetInteractiveDataEvent() const;
+    std::shared_ptr<Kernel::ReadableEvent> GetStateChangedEvent() const;
+
+private:
+    // Queues are named from applet's perspective
+
+    // PopNormalDataToApplet and PushNormalDataFromGame
+    std::deque<std::shared_ptr<IStorage>> in_channel;
+
+    // PopNormalDataToGame and PushNormalDataFromApplet
+    std::deque<std::shared_ptr<IStorage>> out_channel;
+
+    // PopInteractiveDataToApplet and PushInteractiveDataFromGame
+    std::deque<std::shared_ptr<IStorage>> in_interactive_channel;
+
+    // PopInteractiveDataToGame and PushInteractiveDataFromApplet
+    std::deque<std::shared_ptr<IStorage>> out_interactive_channel;
+
+    Kernel::EventPair state_changed_event;
+
+    // Signaled on PushNormalDataFromApplet
+    Kernel::EventPair pop_out_data_event;
+
+    // Signaled on PushInteractiveDataFromApplet
+    Kernel::EventPair pop_interactive_out_data_event;
+};
+
+class Applet {
+public:
+    explicit Applet(Kernel::KernelCore& kernel_);
+    virtual ~Applet();
+
+    virtual void Initialize();
+
+    virtual bool TransactionComplete() const = 0;
+    virtual ResultCode GetStatus() const = 0;
+    virtual void ExecuteInteractive() = 0;
+    virtual void Execute() = 0;
+
+    bool IsInitialized() const {
+        return initialized;
+    }
+
+    AppletDataBroker& GetBroker() {
+        return broker;
+    }
+
+    const AppletDataBroker& GetBroker() const {
+        return broker;
+    }
+
+protected:
+    struct CommonArguments {
+        u32_le arguments_version;
+        u32_le size;
+        u32_le library_version;
+        u32_le theme_color;
+        u8 play_startup_sound;
+        u64_le system_tick;
+    };
+    static_assert(sizeof(CommonArguments) == 0x20, "CommonArguments has incorrect size.");
+
+    CommonArguments common_args{};
+    AppletDataBroker broker;
+    bool initialized = false;
+};
+
+struct AppletFrontendSet {
+    using ControllerApplet = std::unique_ptr<Core::Frontend::ControllerApplet>;
+    using ErrorApplet = std::unique_ptr<Core::Frontend::ErrorApplet>;
+    using ParentalControlsApplet = std::unique_ptr<Core::Frontend::ParentalControlsApplet>;
+    using PhotoViewer = std::unique_ptr<Core::Frontend::PhotoViewerApplet>;
+    using ProfileSelect = std::unique_ptr<Core::Frontend::ProfileSelectApplet>;
+    using SoftwareKeyboard = std::unique_ptr<Core::Frontend::SoftwareKeyboardApplet>;
+    using WebBrowser = std::unique_ptr<Core::Frontend::WebBrowserApplet>;
+
+    AppletFrontendSet();
+    AppletFrontendSet(ControllerApplet controller_applet, ErrorApplet error_applet,
+                      ParentalControlsApplet parental_controls_applet, PhotoViewer photo_viewer_,
+                      ProfileSelect profile_select_, SoftwareKeyboard software_keyboard_,
+                      WebBrowser web_browser_);
+    ~AppletFrontendSet();
+
+    AppletFrontendSet(const AppletFrontendSet&) = delete;
+    AppletFrontendSet& operator=(const AppletFrontendSet&) = delete;
+
+    AppletFrontendSet(AppletFrontendSet&&) noexcept;
+    AppletFrontendSet& operator=(AppletFrontendSet&&) noexcept;
+
+    ControllerApplet controller;
+    ErrorApplet error;
+    ParentalControlsApplet parental_controls;
+    PhotoViewer photo_viewer;
+    ProfileSelect profile_select;
+    SoftwareKeyboard software_keyboard;
+    WebBrowser web_browser;
+};
+
+class AppletManager {
+public:
+    explicit AppletManager(Core::System& system_);
+    ~AppletManager();
+
+    const AppletFrontendSet& GetAppletFrontendSet() const;
+
+    void SetAppletFrontendSet(AppletFrontendSet set);
+    void SetDefaultAppletFrontendSet();
+    void SetDefaultAppletsIfMissing();
+    void ClearAll();
+
+    std::shared_ptr<Applet> GetApplet(AppletId id) const;
+
+private:
+    AppletFrontendSet frontend;
+    Core::System& system;
+};
+
+} // namespace Applets
+} // namespace Service::AM

src/core/hle/service/am/applets/controller.cpp

@@ -0,0 +1,251 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <algorithm>
+#include <cstring>
+
+#include "common/assert.h"
+#include "common/logging/log.h"
+#include "common/string_util.h"
+#include "core/core.h"
+#include "core/frontend/applets/controller.h"
+#include "core/hle/result.h"
+#include "core/hle/service/am/am.h"
+#include "core/hle/service/am/applets/controller.h"
+#include "core/hle/service/hid/controllers/npad.h"
+
+namespace Service::AM::Applets {
+
+// This error code (0x183ACA) is thrown when the applet fails to initialize.
+[[maybe_unused]] constexpr ResultCode ERR_CONTROLLER_APPLET_3101{ErrorModule::HID, 3101};
+// This error code (0x183CCA) is thrown when the u32 result in ControllerSupportResultInfo is 2.
+[[maybe_unused]] constexpr ResultCode ERR_CONTROLLER_APPLET_3102{ErrorModule::HID, 3102};
+
+static Core::Frontend::ControllerParameters ConvertToFrontendParameters(
+    ControllerSupportArgPrivate private_arg, ControllerSupportArgHeader header, bool enable_text,
+    std::vector<IdentificationColor> identification_colors, std::vector<ExplainText> text) {
+    HID::Controller_NPad::NpadStyleSet npad_style_set;
+    npad_style_set.raw = private_arg.style_set;
+
+    return {
+        .min_players = std::max(s8{1}, header.player_count_min),
+        .max_players = header.player_count_max,
+        .keep_controllers_connected = header.enable_take_over_connection,
+        .enable_single_mode = header.enable_single_mode,
+        .enable_border_color = header.enable_identification_color,
+        .border_colors = std::move(identification_colors),
+        .enable_explain_text = enable_text,
+        .explain_text = std::move(text),
+        .allow_pro_controller = npad_style_set.pro_controller == 1,
+        .allow_handheld = npad_style_set.handheld == 1,
+        .allow_dual_joycons = npad_style_set.joycon_dual == 1,
+        .allow_left_joycon = npad_style_set.joycon_left == 1,
+        .allow_right_joycon = npad_style_set.joycon_right == 1,
+    };
+}
+
+Controller::Controller(Core::System& system_, const Core::Frontend::ControllerApplet& frontend_)
+    : Applet{system_.Kernel()}, frontend{frontend_}, system{system_} {}
+
+Controller::~Controller() = default;
+
+void Controller::Initialize() {
+    Applet::Initialize();
+
+    LOG_INFO(Service_HID, "Initializing Controller Applet.");
+
+    LOG_DEBUG(Service_HID,
+              "Initializing Applet with common_args: arg_version={}, lib_version={}, "
+              "play_startup_sound={}, size={}, system_tick={}, theme_color={}",
+              common_args.arguments_version, common_args.library_version,
+              common_args.play_startup_sound, common_args.size, common_args.system_tick,
+              common_args.theme_color);
+
+    controller_applet_version = ControllerAppletVersion{common_args.library_version};
+
+    const auto private_arg_storage = broker.PopNormalDataToApplet();
+    ASSERT(private_arg_storage != nullptr);
+
+    const auto& private_arg = private_arg_storage->GetData();
+    ASSERT(private_arg.size() == sizeof(ControllerSupportArgPrivate));
+
+    std::memcpy(&controller_private_arg, private_arg.data(), private_arg.size());
+    ASSERT_MSG(controller_private_arg.arg_private_size == sizeof(ControllerSupportArgPrivate),
+               "Unknown ControllerSupportArgPrivate revision={} with size={}",
+               controller_applet_version, controller_private_arg.arg_private_size);
+
+    // Some games such as Cave Story+ set invalid values for the ControllerSupportMode.
+    // Defer to arg_size to set the ControllerSupportMode.
+    if (controller_private_arg.mode >= ControllerSupportMode::MaxControllerSupportMode) {
+        switch (controller_private_arg.arg_size) {
+        case sizeof(ControllerSupportArgOld):
+        case sizeof(ControllerSupportArgNew):
+            controller_private_arg.mode = ControllerSupportMode::ShowControllerSupport;
+            break;
+        case sizeof(ControllerUpdateFirmwareArg):
+            controller_private_arg.mode = ControllerSupportMode::ShowControllerFirmwareUpdate;
+            break;
+        default:
+            UNIMPLEMENTED_MSG("Unknown ControllerPrivateArg mode={} with arg_size={}",
+                              controller_private_arg.mode, controller_private_arg.arg_size);
+            controller_private_arg.mode = ControllerSupportMode::ShowControllerSupport;
+            break;
+        }
+    }
+
+    // Some games such as Cave Story+ set invalid values for the ControllerSupportCaller.
+    // This is always 0 (Application) except with ShowControllerFirmwareUpdateForSystem.
+    if (controller_private_arg.caller >= ControllerSupportCaller::MaxControllerSupportCaller) {
+        if (controller_private_arg.flag_1 &&
+            controller_private_arg.mode == ControllerSupportMode::ShowControllerFirmwareUpdate) {
+            controller_private_arg.caller = ControllerSupportCaller::System;
+        } else {
+            controller_private_arg.caller = ControllerSupportCaller::Application;
+        }
+    }
+
+    switch (controller_private_arg.mode) {
+    case ControllerSupportMode::ShowControllerSupport:
+    case ControllerSupportMode::ShowControllerStrapGuide: {
+        const auto user_arg_storage = broker.PopNormalDataToApplet();
+        ASSERT(user_arg_storage != nullptr);
+
+        const auto& user_arg = user_arg_storage->GetData();
+        switch (controller_applet_version) {
+        case ControllerAppletVersion::Version3:
+        case ControllerAppletVersion::Version4:
+        case ControllerAppletVersion::Version5:
+            ASSERT(user_arg.size() == sizeof(ControllerSupportArgOld));
+            std::memcpy(&controller_user_arg_old, user_arg.data(), user_arg.size());
+            break;
+        case ControllerAppletVersion::Version7:
+            ASSERT(user_arg.size() == sizeof(ControllerSupportArgNew));
+            std::memcpy(&controller_user_arg_new, user_arg.data(), user_arg.size());
+            break;
+        default:
+            UNIMPLEMENTED_MSG("Unknown ControllerSupportArg revision={} with size={}",
+                              controller_applet_version, controller_private_arg.arg_size);
+            ASSERT(user_arg.size() >= sizeof(ControllerSupportArgNew));
+            std::memcpy(&controller_user_arg_new, user_arg.data(), sizeof(ControllerSupportArgNew));
+            break;
+        }
+        break;
+    }
+    case ControllerSupportMode::ShowControllerFirmwareUpdate: {
+        const auto update_arg_storage = broker.PopNormalDataToApplet();
+        ASSERT(update_arg_storage != nullptr);
+
+        const auto& update_arg = update_arg_storage->GetData();
+        ASSERT(update_arg.size() == sizeof(ControllerUpdateFirmwareArg));
+
+        std::memcpy(&controller_update_arg, update_arg.data(), update_arg.size());
+        break;
+    }
+    default: {
+        UNIMPLEMENTED_MSG("Unimplemented ControllerSupportMode={}", controller_private_arg.mode);
+        break;
+    }
+    }
+}
+
+bool Controller::TransactionComplete() const {
+    return complete;
+}
+
+ResultCode Controller::GetStatus() const {
+    return status;
+}
+
+void Controller::ExecuteInteractive() {
+    UNREACHABLE_MSG("Attempted to call interactive execution on non-interactive applet.");
+}
+
+void Controller::Execute() {
+    switch (controller_private_arg.mode) {
+    case ControllerSupportMode::ShowControllerSupport: {
+        const auto parameters = [this] {
+            switch (controller_applet_version) {
+            case ControllerAppletVersion::Version3:
+            case ControllerAppletVersion::Version4:
+            case ControllerAppletVersion::Version5:
+                return ConvertToFrontendParameters(
+                    controller_private_arg, controller_user_arg_old.header,
+                    controller_user_arg_old.enable_explain_text,
+                    std::vector<IdentificationColor>(
+                        controller_user_arg_old.identification_colors.begin(),
+                        controller_user_arg_old.identification_colors.end()),
+                    std::vector<ExplainText>(controller_user_arg_old.explain_text.begin(),
+                                             controller_user_arg_old.explain_text.end()));
+            case ControllerAppletVersion::Version7:
+            default:
+                return ConvertToFrontendParameters(
+                    controller_private_arg, controller_user_arg_new.header,
+                    controller_user_arg_new.enable_explain_text,
+                    std::vector<IdentificationColor>(
+                        controller_user_arg_new.identification_colors.begin(),
+                        controller_user_arg_new.identification_colors.end()),
+                    std::vector<ExplainText>(controller_user_arg_new.explain_text.begin(),
+                                             controller_user_arg_new.explain_text.end()));
+            }
+        }();
+
+        is_single_mode = parameters.enable_single_mode;
+
+        LOG_DEBUG(Service_HID,
+                  "Controller Parameters: min_players={}, max_players={}, "
+                  "keep_controllers_connected={}, enable_single_mode={}, enable_border_color={}, "
+                  "enable_explain_text={}, allow_pro_controller={}, allow_handheld={}, "
+                  "allow_dual_joycons={}, allow_left_joycon={}, allow_right_joycon={}",
+                  parameters.min_players, parameters.max_players,
+                  parameters.keep_controllers_connected, parameters.enable_single_mode,
+                  parameters.enable_border_color, parameters.enable_explain_text,
+                  parameters.allow_pro_controller, parameters.allow_handheld,
+                  parameters.allow_dual_joycons, parameters.allow_left_joycon,
+                  parameters.allow_right_joycon);
+
+        frontend.ReconfigureControllers([this] { ConfigurationComplete(); }, parameters);
+        break;
+    }
+    case ControllerSupportMode::ShowControllerStrapGuide:
+    case ControllerSupportMode::ShowControllerFirmwareUpdate:
+        UNIMPLEMENTED_MSG("ControllerSupportMode={} is not implemented",
+                          controller_private_arg.mode);
+        [[fallthrough]];
+    default: {
+        ConfigurationComplete();
+        break;
+    }
+    }
+}
+
+void Controller::ConfigurationComplete() {
+    ControllerSupportResultInfo result_info{};
+
+    const auto& players = Settings::values.players.GetValue();
+
+    // If enable_single_mode is enabled, player_count is 1 regardless of any other parameters.
+    // Otherwise, only count connected players from P1-P8.
+    result_info.player_count =
+        is_single_mode
+            ? 1
+            : static_cast<s8>(std::count_if(players.begin(), players.end() - 2,
+                                            [](const auto& player) { return player.connected; }));
+
+    result_info.selected_id = HID::Controller_NPad::IndexToNPad(std::distance(
+        players.begin(), std::find_if(players.begin(), players.end(),
+                                      [](const auto& player) { return player.connected; })));
+
+    result_info.result = 0;
+
+    LOG_DEBUG(Service_HID, "Result Info: player_count={}, selected_id={}, result={}",
+              result_info.player_count, result_info.selected_id, result_info.result);
+
+    complete = true;
+    out_data = std::vector<u8>(sizeof(ControllerSupportResultInfo));
+    std::memcpy(out_data.data(), &result_info, out_data.size());
+    broker.PushNormalDataFromApplet(std::make_shared<IStorage>(system, std::move(out_data)));
+    broker.SignalStateChanged();
+}
+
+} // namespace Service::AM::Applets

src/core/hle/service/am/applets/controller.h

@@ -0,0 +1,136 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+#include <vector>
+
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+#include "core/hle/result.h"
+#include "core/hle/service/am/applets/applets.h"
+
+namespace Core {
+class System;
+}
+
+namespace Service::AM::Applets {
+
+using IdentificationColor = std::array<u8, 4>;
+using ExplainText = std::array<char, 0x81>;
+
+enum class ControllerAppletVersion : u32_le {
+    Version3 = 0x3, // 1.0.0 - 2.3.0
+    Version4 = 0x4, // 3.0.0 - 5.1.0
+    Version5 = 0x5, // 6.0.0 - 7.0.1
+    Version7 = 0x7, // 8.0.0+
+};
+
+enum class ControllerSupportMode : u8 {
+    ShowControllerSupport,
+    ShowControllerStrapGuide,
+    ShowControllerFirmwareUpdate,
+
+    MaxControllerSupportMode,
+};
+
+enum class ControllerSupportCaller : u8 {
+    Application,
+    System,
+
+    MaxControllerSupportCaller,
+};
+
+struct ControllerSupportArgPrivate {
+    u32 arg_private_size{};
+    u32 arg_size{};
+    bool flag_0{};
+    bool flag_1{};
+    ControllerSupportMode mode{};
+    ControllerSupportCaller caller{};
+    u32 style_set{};
+    u32 joy_hold_type{};
+};
+static_assert(sizeof(ControllerSupportArgPrivate) == 0x14,
+              "ControllerSupportArgPrivate has incorrect size.");
+
+struct ControllerSupportArgHeader {
+    s8 player_count_min{};
+    s8 player_count_max{};
+    bool enable_take_over_connection{};
+    bool enable_left_justify{};
+    bool enable_permit_joy_dual{};
+    bool enable_single_mode{};
+    bool enable_identification_color{};
+};
+static_assert(sizeof(ControllerSupportArgHeader) == 0x7,
+              "ControllerSupportArgHeader has incorrect size.");
+
+// LibraryAppletVersion 0x3, 0x4, 0x5
+struct ControllerSupportArgOld {
+    ControllerSupportArgHeader header{};
+    std::array<IdentificationColor, 4> identification_colors{};
+    bool enable_explain_text{};
+    std::array<ExplainText, 4> explain_text{};
+};
+static_assert(sizeof(ControllerSupportArgOld) == 0x21C,
+              "ControllerSupportArgOld has incorrect size.");
+
+// LibraryAppletVersion 0x7
+struct ControllerSupportArgNew {
+    ControllerSupportArgHeader header{};
+    std::array<IdentificationColor, 8> identification_colors{};
+    bool enable_explain_text{};
+    std::array<ExplainText, 8> explain_text{};
+};
+static_assert(sizeof(ControllerSupportArgNew) == 0x430,
+              "ControllerSupportArgNew has incorrect size.");
+
+struct ControllerUpdateFirmwareArg {
+    bool enable_force_update{};
+    INSERT_PADDING_BYTES(3);
+};
+static_assert(sizeof(ControllerUpdateFirmwareArg) == 0x4,
+              "ControllerUpdateFirmwareArg has incorrect size.");
+
+struct ControllerSupportResultInfo {
+    s8 player_count{};
+    INSERT_PADDING_BYTES(3);
+    u32 selected_id{};
+    u32 result{};
+};
+static_assert(sizeof(ControllerSupportResultInfo) == 0xC,
+              "ControllerSupportResultInfo has incorrect size.");
+
+class Controller final : public Applet {
+public:
+    explicit Controller(Core::System& system_, const Core::Frontend::ControllerApplet& frontend_);
+    ~Controller() override;
+
+    void Initialize() override;
+
+    bool TransactionComplete() const override;
+    ResultCode GetStatus() const override;
+    void ExecuteInteractive() override;
+    void Execute() override;
+
+    void ConfigurationComplete();
+
+private:
+    const Core::Frontend::ControllerApplet& frontend;
+    Core::System& system;
+
+    ControllerAppletVersion controller_applet_version;
+    ControllerSupportArgPrivate controller_private_arg;
+    ControllerSupportArgOld controller_user_arg_old;
+    ControllerSupportArgNew controller_user_arg_new;
+    ControllerUpdateFirmwareArg controller_update_arg;
+    bool complete{false};
+    ResultCode status{RESULT_SUCCESS};
+    bool is_single_mode{false};
+    std::vector<u8> out_data;
+};
+
+} // namespace Service::AM::Applets

src/core/hle/service/am/applets/error.cpp

@@ -0,0 +1,193 @@
+// Copyright 2019 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <array>
+#include <cstring>
+#include "common/assert.h"
+#include "common/logging/log.h"
+#include "common/string_util.h"
+#include "core/core.h"
+#include "core/frontend/applets/error.h"
+#include "core/hle/kernel/process.h"
+#include "core/hle/service/am/am.h"
+#include "core/hle/service/am/applets/error.h"
+#include "core/reporter.h"
+
+namespace Service::AM::Applets {
+
+#pragma pack(push, 4)
+struct ShowError {
+    u8 mode;
+    bool jump;
+    INSERT_UNION_PADDING_BYTES(4);
+    bool use_64bit_error_code;
+    INSERT_UNION_PADDING_BYTES(1);
+    u64 error_code_64;
+    u32 error_code_32;
+};
+static_assert(sizeof(ShowError) == 0x14, "ShowError has incorrect size.");
+#pragma pack(pop)
+
+struct ShowErrorRecord {
+    u8 mode;
+    bool jump;
+    INSERT_UNION_PADDING_BYTES(6);
+    u64 error_code_64;
+    u64 posix_time;
+};
+static_assert(sizeof(ShowErrorRecord) == 0x18, "ShowErrorRecord has incorrect size.");
+
+struct SystemErrorArg {
+    u8 mode;
+    bool jump;
+    INSERT_UNION_PADDING_BYTES(6);
+    u64 error_code_64;
+    std::array<char, 8> language_code;
+    std::array<char, 0x800> main_text;
+    std::array<char, 0x800> detail_text;
+};
+static_assert(sizeof(SystemErrorArg) == 0x1018, "SystemErrorArg has incorrect size.");
+
+struct ApplicationErrorArg {
+    u8 mode;
+    bool jump;
+    INSERT_UNION_PADDING_BYTES(6);
+    u32 error_code;
+    std::array<char, 8> language_code;
+    std::array<char, 0x800> main_text;
+    std::array<char, 0x800> detail_text;
+};
+static_assert(sizeof(ApplicationErrorArg) == 0x1014, "ApplicationErrorArg has incorrect size.");
+
+union Error::ErrorArguments {
+    ShowError error;
+    ShowErrorRecord error_record;
+    SystemErrorArg system_error;
+    ApplicationErrorArg application_error;
+    std::array<u8, 0x1018> raw{};
+};
+
+namespace {
+template <typename T>
+void CopyArgumentData(const std::vector<u8>& data, T& variable) {
+    ASSERT(data.size() >= sizeof(T));
+    std::memcpy(&variable, data.data(), sizeof(T));
+}
+
+ResultCode Decode64BitError(u64 error) {
+    const auto description = (error >> 32) & 0x1FFF;
+    auto module = error & 0x3FF;
+    if (module >= 2000)
+        module -= 2000;
+    module &= 0x1FF;
+    return {static_cast<ErrorModule>(module), static_cast<u32>(description)};
+}
+
+} // Anonymous namespace
+
+Error::Error(Core::System& system_, const Core::Frontend::ErrorApplet& frontend_)
+    : Applet{system_.Kernel()}, frontend{frontend_}, system{system_} {}
+
+Error::~Error() = default;
+
+void Error::Initialize() {
+    Applet::Initialize();
+    args = std::make_unique<ErrorArguments>();
+    complete = false;
+
+    const auto storage = broker.PopNormalDataToApplet();
+    ASSERT(storage != nullptr);
+    const auto data = storage->GetData();
+
+    ASSERT(!data.empty());
+    std::memcpy(&mode, data.data(), sizeof(ErrorAppletMode));
+
+    switch (mode) {
+    case ErrorAppletMode::ShowError:
+        CopyArgumentData(data, args->error);
+        if (args->error.use_64bit_error_code) {
+            error_code = Decode64BitError(args->error.error_code_64);
+        } else {
+            error_code = ResultCode(args->error.error_code_32);
+        }
+        break;
+    case ErrorAppletMode::ShowSystemError:
+        CopyArgumentData(data, args->system_error);
+        error_code = ResultCode(Decode64BitError(args->system_error.error_code_64));
+        break;
+    case ErrorAppletMode::ShowApplicationError:
+        CopyArgumentData(data, args->application_error);
+        error_code = ResultCode(args->application_error.error_code);
+        break;
+    case ErrorAppletMode::ShowErrorRecord:
+        CopyArgumentData(data, args->error_record);
+        error_code = Decode64BitError(args->error_record.error_code_64);
+        break;
+    default:
+        UNIMPLEMENTED_MSG("Unimplemented LibAppletError mode={:02X}!", mode);
+    }
+}
+
+bool Error::TransactionComplete() const {
+    return complete;
+}
+
+ResultCode Error::GetStatus() const {
+    return RESULT_SUCCESS;
+}
+
+void Error::ExecuteInteractive() {
+    UNREACHABLE_MSG("Unexpected interactive applet data!");
+}
+
+void Error::Execute() {
+    if (complete) {
+        return;
+    }
+
+    const auto callback = [this] { DisplayCompleted(); };
+    const auto title_id = system.CurrentProcess()->GetTitleID();
+    const auto& reporter{system.GetReporter()};
+
+    switch (mode) {
+    case ErrorAppletMode::ShowError:
+        reporter.SaveErrorReport(title_id, error_code);
+        frontend.ShowError(error_code, callback);
+        break;
+    case ErrorAppletMode::ShowSystemError:
+    case ErrorAppletMode::ShowApplicationError: {
+        const auto system = mode == ErrorAppletMode::ShowSystemError;
+        const auto& main_text =
+            system ? args->system_error.main_text : args->application_error.main_text;
+        const auto& detail_text =
+            system ? args->system_error.detail_text : args->application_error.detail_text;
+
+        const auto main_text_string =
+            Common::StringFromFixedZeroTerminatedBuffer(main_text.data(), main_text.size());
+        const auto detail_text_string =
+            Common::StringFromFixedZeroTerminatedBuffer(detail_text.data(), detail_text.size());
+
+        reporter.SaveErrorReport(title_id, error_code, main_text_string, detail_text_string);
+        frontend.ShowCustomErrorText(error_code, main_text_string, detail_text_string, callback);
+        break;
+    }
+    case ErrorAppletMode::ShowErrorRecord:
+        reporter.SaveErrorReport(title_id, error_code,
+                                 fmt::format("{:016X}", args->error_record.posix_time));
+        frontend.ShowErrorWithTimestamp(
+            error_code, std::chrono::seconds{args->error_record.posix_time}, callback);
+        break;
+    default:
+        UNIMPLEMENTED_MSG("Unimplemented LibAppletError mode={:02X}!", mode);
+        DisplayCompleted();
+    }
+}
+
+void Error::DisplayCompleted() {
+    complete = true;
+    broker.PushNormalDataFromApplet(std::make_shared<IStorage>(system, std::vector<u8>{}));
+    broker.SignalStateChanged();
+}
+
+} // namespace Service::AM::Applets

src/core/hle/service/am/applets/error.h

@@ -0,0 +1,52 @@
+// Copyright 2019 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/result.h"
+#include "core/hle/service/am/applets/applets.h"
+
+namespace Core {
+class System;
+}
+
+namespace Service::AM::Applets {
+
+enum class ErrorAppletMode : u8 {
+    ShowError = 0,
+    ShowSystemError = 1,
+    ShowApplicationError = 2,
+    ShowEula = 3,
+    ShowErrorPctl = 4,
+    ShowErrorRecord = 5,
+    ShowUpdateEula = 8,
+};
+
+class Error final : public Applet {
+public:
+    explicit Error(Core::System& system_, const Core::Frontend::ErrorApplet& frontend_);
+    ~Error() override;
+
+    void Initialize() override;
+
+    bool TransactionComplete() const override;
+    ResultCode GetStatus() const override;
+    void ExecuteInteractive() override;
+    void Execute() override;
+
+    void DisplayCompleted();
+
+private:
+    union ErrorArguments;
+
+    const Core::Frontend::ErrorApplet& frontend;
+    ResultCode error_code = RESULT_SUCCESS;
+    ErrorAppletMode mode = ErrorAppletMode::ShowError;
+    std::unique_ptr<ErrorArguments> args;
+
+    bool complete = false;
+    Core::System& system;
+};
+
+} // namespace Service::AM::Applets

src/core/hle/service/am/applets/general_backend.cpp

@@ -0,0 +1,253 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <string_view>
+
+#include "common/assert.h"
+#include "common/hex_util.h"
+#include "common/logging/log.h"
+#include "core/core.h"
+#include "core/frontend/applets/general_frontend.h"
+#include "core/hle/kernel/process.h"
+#include "core/hle/result.h"
+#include "core/hle/service/am/am.h"
+#include "core/hle/service/am/applets/general_backend.h"
+#include "core/reporter.h"
+
+namespace Service::AM::Applets {
+
+constexpr ResultCode ERROR_INVALID_PIN{ErrorModule::PCTL, 221};
+
+static void LogCurrentStorage(AppletDataBroker& broker, std::string_view prefix) {
+    std::shared_ptr<IStorage> storage = broker.PopNormalDataToApplet();
+    for (; storage != nullptr; storage = broker.PopNormalDataToApplet()) {
+        const auto data = storage->GetData();
+        LOG_INFO(Service_AM,
+                 "called (STUBBED), during {} received normal data with size={:08X}, data={}",
+                 prefix, data.size(), Common::HexToString(data));
+    }
+
+    storage = broker.PopInteractiveDataToApplet();
+    for (; storage != nullptr; storage = broker.PopInteractiveDataToApplet()) {
+        const auto data = storage->GetData();
+        LOG_INFO(Service_AM,
+                 "called (STUBBED), during {} received interactive data with size={:08X}, data={}",
+                 prefix, data.size(), Common::HexToString(data));
+    }
+}
+
+Auth::Auth(Core::System& system_, Core::Frontend::ParentalControlsApplet& frontend_)
+    : Applet{system_.Kernel()}, frontend{frontend_}, system{system_} {}
+
+Auth::~Auth() = default;
+
+void Auth::Initialize() {
+    Applet::Initialize();
+    complete = false;
+
+    const auto storage = broker.PopNormalDataToApplet();
+    ASSERT(storage != nullptr);
+    const auto data = storage->GetData();
+    ASSERT(data.size() >= 0xC);
+
+    struct Arg {
+        INSERT_PADDING_BYTES(4);
+        AuthAppletType type;
+        u8 arg0;
+        u8 arg1;
+        u8 arg2;
+        INSERT_PADDING_BYTES(1);
+    };
+    static_assert(sizeof(Arg) == 0xC, "Arg (AuthApplet) has incorrect size.");
+
+    Arg arg{};
+    std::memcpy(&arg, data.data(), sizeof(Arg));
+
+    type = arg.type;
+    arg0 = arg.arg0;
+    arg1 = arg.arg1;
+    arg2 = arg.arg2;
+}
+
+bool Auth::TransactionComplete() const {
+    return complete;
+}
+
+ResultCode Auth::GetStatus() const {
+    return successful ? RESULT_SUCCESS : ERROR_INVALID_PIN;
+}
+
+void Auth::ExecuteInteractive() {
+    UNREACHABLE_MSG("Unexpected interactive applet data.");
+}
+
+void Auth::Execute() {
+    if (complete) {
+        return;
+    }
+
+    const auto unimplemented_log = [this] {
+        UNIMPLEMENTED_MSG("Unimplemented Auth applet type for type={:08X}, arg0={:02X}, "
+                          "arg1={:02X}, arg2={:02X}",
+                          type, arg0, arg1, arg2);
+    };
+
+    switch (type) {
+    case AuthAppletType::ShowParentalAuthentication: {
+        const auto callback = [this](bool successful) { AuthFinished(successful); };
+
+        if (arg0 == 1 && arg1 == 0 && arg2 == 1) {
+            // ShowAuthenticatorForConfiguration
+            frontend.VerifyPINForSettings(callback);
+        } else if (arg1 == 0 && arg2 == 0) {
+            // ShowParentalAuthentication(bool)
+            frontend.VerifyPIN(callback, static_cast<bool>(arg0));
+        } else {
+            unimplemented_log();
+        }
+        break;
+    }
+    case AuthAppletType::RegisterParentalPasscode: {
+        const auto callback = [this] { AuthFinished(true); };
+
+        if (arg0 == 0 && arg1 == 0 && arg2 == 0) {
+            // RegisterParentalPasscode
+            frontend.RegisterPIN(callback);
+        } else {
+            unimplemented_log();
+        }
+        break;
+    }
+    case AuthAppletType::ChangeParentalPasscode: {
+        const auto callback = [this] { AuthFinished(true); };
+
+        if (arg0 == 0 && arg1 == 0 && arg2 == 0) {
+            // ChangeParentalPasscode
+            frontend.ChangePIN(callback);
+        } else {
+            unimplemented_log();
+        }
+        break;
+    }
+    default:
+        unimplemented_log();
+    }
+}
+
+void Auth::AuthFinished(bool is_successful) {
+    successful = is_successful;
+
+    struct Return {
+        ResultCode result_code;
+    };
+    static_assert(sizeof(Return) == 0x4, "Return (AuthApplet) has incorrect size.");
+
+    Return return_{GetStatus()};
+
+    std::vector<u8> out(sizeof(Return));
+    std::memcpy(out.data(), &return_, sizeof(Return));
+
+    broker.PushNormalDataFromApplet(std::make_shared<IStorage>(system, std::move(out)));
+    broker.SignalStateChanged();
+}
+
+PhotoViewer::PhotoViewer(Core::System& system_, const Core::Frontend::PhotoViewerApplet& frontend_)
+    : Applet{system_.Kernel()}, frontend{frontend_}, system{system_} {}
+
+PhotoViewer::~PhotoViewer() = default;
+
+void PhotoViewer::Initialize() {
+    Applet::Initialize();
+    complete = false;
+
+    const auto storage = broker.PopNormalDataToApplet();
+    ASSERT(storage != nullptr);
+    const auto data = storage->GetData();
+    ASSERT(!data.empty());
+    mode = static_cast<PhotoViewerAppletMode>(data[0]);
+}
+
+bool PhotoViewer::TransactionComplete() const {
+    return complete;
+}
+
+ResultCode PhotoViewer::GetStatus() const {
+    return RESULT_SUCCESS;
+}
+
+void PhotoViewer::ExecuteInteractive() {
+    UNREACHABLE_MSG("Unexpected interactive applet data.");
+}
+
+void PhotoViewer::Execute() {
+    if (complete)
+        return;
+
+    const auto callback = [this] { ViewFinished(); };
+    switch (mode) {
+    case PhotoViewerAppletMode::CurrentApp:
+        frontend.ShowPhotosForApplication(system.CurrentProcess()->GetTitleID(), callback);
+        break;
+    case PhotoViewerAppletMode::AllApps:
+        frontend.ShowAllPhotos(callback);
+        break;
+    default:
+        UNIMPLEMENTED_MSG("Unimplemented PhotoViewer applet mode={:02X}!", mode);
+    }
+}
+
+void PhotoViewer::ViewFinished() {
+    broker.PushNormalDataFromApplet(std::make_shared<IStorage>(system, std::vector<u8>{}));
+    broker.SignalStateChanged();
+}
+
+StubApplet::StubApplet(Core::System& system_, AppletId id_)
+    : Applet{system_.Kernel()}, id{id_}, system{system_} {}
+
+StubApplet::~StubApplet() = default;
+
+void StubApplet::Initialize() {
+    LOG_WARNING(Service_AM, "called (STUBBED)");
+    Applet::Initialize();
+
+    const auto data = broker.PeekDataToAppletForDebug();
+    system.GetReporter().SaveUnimplementedAppletReport(
+        static_cast<u32>(id), common_args.arguments_version, common_args.library_version,
+        common_args.theme_color, common_args.play_startup_sound, common_args.system_tick,
+        data.normal, data.interactive);
+
+    LogCurrentStorage(broker, "Initialize");
+}
+
+bool StubApplet::TransactionComplete() const {
+    LOG_WARNING(Service_AM, "called (STUBBED)");
+    return true;
+}
+
+ResultCode StubApplet::GetStatus() const {
+    LOG_WARNING(Service_AM, "called (STUBBED)");
+    return RESULT_SUCCESS;
+}
+
+void StubApplet::ExecuteInteractive() {
+    LOG_WARNING(Service_AM, "called (STUBBED)");
+    LogCurrentStorage(broker, "ExecuteInteractive");
+
+    broker.PushNormalDataFromApplet(std::make_shared<IStorage>(system, std::vector<u8>(0x1000)));
+    broker.PushInteractiveDataFromApplet(
+        std::make_shared<IStorage>(system, std::vector<u8>(0x1000)));
+    broker.SignalStateChanged();
+}
+
+void StubApplet::Execute() {
+    LOG_WARNING(Service_AM, "called (STUBBED)");
+    LogCurrentStorage(broker, "Execute");
+
+    broker.PushNormalDataFromApplet(std::make_shared<IStorage>(system, std::vector<u8>(0x1000)));
+    broker.PushInteractiveDataFromApplet(
+        std::make_shared<IStorage>(system, std::vector<u8>(0x1000)));
+    broker.SignalStateChanged();
+}
+
+} // namespace Service::AM::Applets

src/core/hle/service/am/applets/general_backend.h

@@ -0,0 +1,88 @@
+// Copyright 2019 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/am/applets/applets.h"
+
+namespace Core {
+class System;
+}
+
+namespace Service::AM::Applets {
+
+enum class AuthAppletType : u32 {
+    ShowParentalAuthentication,
+    RegisterParentalPasscode,
+    ChangeParentalPasscode,
+};
+
+class Auth final : public Applet {
+public:
+    explicit Auth(Core::System& system_, Core::Frontend::ParentalControlsApplet& frontend_);
+    ~Auth() override;
+
+    void Initialize() override;
+    bool TransactionComplete() const override;
+    ResultCode GetStatus() const override;
+    void ExecuteInteractive() override;
+    void Execute() override;
+
+    void AuthFinished(bool is_successful = true);
+
+private:
+    Core::Frontend::ParentalControlsApplet& frontend;
+    Core::System& system;
+    bool complete = false;
+    bool successful = false;
+
+    AuthAppletType type = AuthAppletType::ShowParentalAuthentication;
+    u8 arg0 = 0;
+    u8 arg1 = 0;
+    u8 arg2 = 0;
+};
+
+enum class PhotoViewerAppletMode : u8 {
+    CurrentApp = 0,
+    AllApps = 1,
+};
+
+class PhotoViewer final : public Applet {
+public:
+    explicit PhotoViewer(Core::System& system_, const Core::Frontend::PhotoViewerApplet& frontend_);
+    ~PhotoViewer() override;
+
+    void Initialize() override;
+    bool TransactionComplete() const override;
+    ResultCode GetStatus() const override;
+    void ExecuteInteractive() override;
+    void Execute() override;
+
+    void ViewFinished();
+
+private:
+    const Core::Frontend::PhotoViewerApplet& frontend;
+    bool complete = false;
+    PhotoViewerAppletMode mode = PhotoViewerAppletMode::CurrentApp;
+    Core::System& system;
+};
+
+class StubApplet final : public Applet {
+public:
+    explicit StubApplet(Core::System& system_, AppletId id_);
+    ~StubApplet() override;
+
+    void Initialize() override;
+
+    bool TransactionComplete() const override;
+    ResultCode GetStatus() const override;
+    void ExecuteInteractive() override;
+    void Execute() override;
+
+private:
+    AppletId id;
+    Core::System& system;
+};
+
+} // namespace Service::AM::Applets

src/core/hle/service/am/applets/profile_select.cpp

@@ -0,0 +1,78 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <cstring>
+
+#include "common/assert.h"
+#include "common/string_util.h"
+#include "core/core.h"
+#include "core/frontend/applets/profile_select.h"
+#include "core/hle/service/am/am.h"
+#include "core/hle/service/am/applets/profile_select.h"
+
+namespace Service::AM::Applets {
+
+constexpr ResultCode ERR_USER_CANCELLED_SELECTION{ErrorModule::Account, 1};
+
+ProfileSelect::ProfileSelect(Core::System& system_,
+                             const Core::Frontend::ProfileSelectApplet& frontend_)
+    : Applet{system_.Kernel()}, frontend{frontend_}, system{system_} {}
+
+ProfileSelect::~ProfileSelect() = default;
+
+void ProfileSelect::Initialize() {
+    complete = false;
+    status = RESULT_SUCCESS;
+    final_data.clear();
+
+    Applet::Initialize();
+
+    const auto user_config_storage = broker.PopNormalDataToApplet();
+    ASSERT(user_config_storage != nullptr);
+    const auto& user_config = user_config_storage->GetData();
+
+    ASSERT(user_config.size() >= sizeof(UserSelectionConfig));
+    std::memcpy(&config, user_config.data(), sizeof(UserSelectionConfig));
+}
+
+bool ProfileSelect::TransactionComplete() const {
+    return complete;
+}
+
+ResultCode ProfileSelect::GetStatus() const {
+    return status;
+}
+
+void ProfileSelect::ExecuteInteractive() {
+    UNREACHABLE_MSG("Attempted to call interactive execution on non-interactive applet.");
+}
+
+void ProfileSelect::Execute() {
+    if (complete) {
+        broker.PushNormalDataFromApplet(std::make_shared<IStorage>(system, std::move(final_data)));
+        return;
+    }
+
+    frontend.SelectProfile([this](std::optional<Common::UUID> uuid) { SelectionComplete(uuid); });
+}
+
+void ProfileSelect::SelectionComplete(std::optional<Common::UUID> uuid) {
+    UserSelectionOutput output{};
+
+    if (uuid.has_value() && uuid->uuid != Common::INVALID_UUID) {
+        output.result = 0;
+        output.uuid_selected = uuid->uuid;
+    } else {
+        status = ERR_USER_CANCELLED_SELECTION;
+        output.result = ERR_USER_CANCELLED_SELECTION.raw;
+        output.uuid_selected = Common::INVALID_UUID;
+    }
+
+    final_data = std::vector<u8>(sizeof(UserSelectionOutput));
+    std::memcpy(final_data.data(), &output, final_data.size());
+    broker.PushNormalDataFromApplet(std::make_shared<IStorage>(system, std::move(final_data)));
+    broker.SignalStateChanged();
+}
+
+} // namespace Service::AM::Applets

src/core/hle/service/am/applets/profile_select.h

@@ -0,0 +1,59 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <vector>
+
+#include "common/common_funcs.h"
+#include "common/uuid.h"
+#include "core/hle/result.h"
+#include "core/hle/service/am/applets/applets.h"
+
+namespace Core {
+class System;
+}
+
+namespace Service::AM::Applets {
+
+struct UserSelectionConfig {
+    // TODO(DarkLordZach): RE this structure
+    // It seems to be flags and the like that determine the UI of the applet on the switch... from
+    // my research this is safe to ignore for now.
+    INSERT_PADDING_BYTES(0xA0);
+};
+static_assert(sizeof(UserSelectionConfig) == 0xA0, "UserSelectionConfig has incorrect size.");
+
+struct UserSelectionOutput {
+    u64 result;
+    u128 uuid_selected;
+};
+static_assert(sizeof(UserSelectionOutput) == 0x18, "UserSelectionOutput has incorrect size.");
+
+class ProfileSelect final : public Applet {
+public:
+    explicit ProfileSelect(Core::System& system_,
+                           const Core::Frontend::ProfileSelectApplet& frontend_);
+    ~ProfileSelect() override;
+
+    void Initialize() override;
+
+    bool TransactionComplete() const override;
+    ResultCode GetStatus() const override;
+    void ExecuteInteractive() override;
+    void Execute() override;
+
+    void SelectionComplete(std::optional<Common::UUID> uuid);
+
+private:
+    const Core::Frontend::ProfileSelectApplet& frontend;
+
+    UserSelectionConfig config;
+    bool complete = false;
+    ResultCode status = RESULT_SUCCESS;
+    std::vector<u8> final_data;
+    Core::System& system;
+};
+
+} // namespace Service::AM::Applets

src/core/hle/service/am/applets/software_keyboard.cpp

@@ -0,0 +1,196 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <cstring>
+#include "common/assert.h"
+#include "common/string_util.h"
+#include "core/core.h"
+#include "core/frontend/applets/software_keyboard.h"
+#include "core/hle/result.h"
+#include "core/hle/service/am/am.h"
+#include "core/hle/service/am/applets/software_keyboard.h"
+
+namespace Service::AM::Applets {
+
+namespace {
+enum class Request : u32 {
+    Finalize = 0x4,
+    SetUserWordInfo = 0x6,
+    SetCustomizeDic = 0x7,
+    Calc = 0xa,
+    SetCustomizedDictionaries = 0xb,
+    UnsetCustomizedDictionaries = 0xc,
+    UnknownD = 0xd,
+    UnknownE = 0xe,
+};
+constexpr std::size_t SWKBD_INLINE_INIT_SIZE = 0x8;
+constexpr std::size_t SWKBD_OUTPUT_BUFFER_SIZE = 0x7D8;
+constexpr std::size_t SWKBD_OUTPUT_INTERACTIVE_BUFFER_SIZE = 0x7D4;
+constexpr std::size_t DEFAULT_MAX_LENGTH = 500;
+constexpr bool INTERACTIVE_STATUS_OK = false;
+} // Anonymous namespace
+static Core::Frontend::SoftwareKeyboardParameters ConvertToFrontendParameters(
+    KeyboardConfig config, std::u16string initial_text) {
+    Core::Frontend::SoftwareKeyboardParameters params{};
+
+    params.submit_text = Common::UTF16StringFromFixedZeroTerminatedBuffer(
+        config.submit_text.data(), config.submit_text.size());
+    params.header_text = Common::UTF16StringFromFixedZeroTerminatedBuffer(
+        config.header_text.data(), config.header_text.size());
+    params.sub_text = Common::UTF16StringFromFixedZeroTerminatedBuffer(config.sub_text.data(),
+                                                                       config.sub_text.size());
+    params.guide_text = Common::UTF16StringFromFixedZeroTerminatedBuffer(config.guide_text.data(),
+                                                                         config.guide_text.size());
+    params.initial_text = std::move(initial_text);
+    params.max_length = config.length_limit == 0 ? DEFAULT_MAX_LENGTH : config.length_limit;
+    params.password = static_cast<bool>(config.is_password);
+    params.cursor_at_beginning = static_cast<bool>(config.initial_cursor_position);
+    params.value = static_cast<u8>(config.keyset_disable_bitmask);
+
+    return params;
+}
+
+SoftwareKeyboard::SoftwareKeyboard(Core::System& system_,
+                                   const Core::Frontend::SoftwareKeyboardApplet& frontend_)
+    : Applet{system_.Kernel()}, frontend{frontend_}, system{system_} {}
+
+SoftwareKeyboard::~SoftwareKeyboard() = default;
+
+void SoftwareKeyboard::Initialize() {
+    complete = false;
+    is_inline = false;
+    initial_text.clear();
+    final_data.clear();
+
+    Applet::Initialize();
+
+    const auto keyboard_config_storage = broker.PopNormalDataToApplet();
+    ASSERT(keyboard_config_storage != nullptr);
+    const auto& keyboard_config = keyboard_config_storage->GetData();
+
+    if (keyboard_config.size() == SWKBD_INLINE_INIT_SIZE) {
+        is_inline = true;
+        return;
+    }
+
+    ASSERT(keyboard_config.size() >= sizeof(KeyboardConfig));
+    std::memcpy(&config, keyboard_config.data(), sizeof(KeyboardConfig));
+
+    const auto work_buffer_storage = broker.PopNormalDataToApplet();
+    ASSERT_OR_EXECUTE(work_buffer_storage != nullptr, { return; });
+    const auto& work_buffer = work_buffer_storage->GetData();
+
+    if (config.initial_string_size == 0)
+        return;
+
+    std::vector<char16_t> string(config.initial_string_size);
+    std::memcpy(string.data(), work_buffer.data() + config.initial_string_offset,
+                string.size() * 2);
+    initial_text = Common::UTF16StringFromFixedZeroTerminatedBuffer(string.data(), string.size());
+}
+
+bool SoftwareKeyboard::TransactionComplete() const {
+    return complete;
+}
+
+ResultCode SoftwareKeyboard::GetStatus() const {
+    return RESULT_SUCCESS;
+}
+
+void SoftwareKeyboard::ExecuteInteractive() {
+    if (complete)
+        return;
+
+    const auto storage = broker.PopInteractiveDataToApplet();
+    ASSERT(storage != nullptr);
+    const auto data = storage->GetData();
+    if (!is_inline) {
+        const auto status = static_cast<bool>(data[0]);
+        if (status == INTERACTIVE_STATUS_OK) {
+            complete = true;
+        } else {
+            std::array<char16_t, SWKBD_OUTPUT_INTERACTIVE_BUFFER_SIZE / 2 - 2> string;
+            std::memcpy(string.data(), data.data() + 4, string.size() * 2);
+            frontend.SendTextCheckDialog(
+                Common::UTF16StringFromFixedZeroTerminatedBuffer(string.data(), string.size()),
+                [this] { broker.SignalStateChanged(); });
+        }
+    } else {
+        Request request{};
+        std::memcpy(&request, data.data(), sizeof(Request));
+
+        switch (request) {
+        case Request::Calc: {
+            broker.PushNormalDataFromApplet(std::make_shared<IStorage>(system, std::vector<u8>{1}));
+            broker.SignalStateChanged();
+            break;
+        }
+        default:
+            UNIMPLEMENTED_MSG("Request {:X} is not implemented", request);
+            break;
+        }
+    }
+}
+
+void SoftwareKeyboard::Execute() {
+    if (complete) {
+        broker.PushNormalDataFromApplet(std::make_shared<IStorage>(system, std::move(final_data)));
+        broker.SignalStateChanged();
+        return;
+    }
+
+    const auto parameters = ConvertToFrontendParameters(config, initial_text);
+    if (!is_inline) {
+        frontend.RequestText(
+            [this](std::optional<std::u16string> text) { WriteText(std::move(text)); }, parameters);
+    }
+}
+
+void SoftwareKeyboard::WriteText(std::optional<std::u16string> text) {
+    std::vector<u8> output_main(SWKBD_OUTPUT_BUFFER_SIZE);
+
+    if (text.has_value()) {
+        std::vector<u8> output_sub(SWKBD_OUTPUT_BUFFER_SIZE);
+
+        if (config.utf_8) {
+            const u64 size = text->size() + sizeof(u64);
+            const auto new_text = Common::UTF16ToUTF8(*text);
+
+            std::memcpy(output_sub.data(), &size, sizeof(u64));
+            std::memcpy(output_sub.data() + 8, new_text.data(),
+                        std::min(new_text.size(), SWKBD_OUTPUT_BUFFER_SIZE - 8));
+
+            output_main[0] = INTERACTIVE_STATUS_OK;
+            std::memcpy(output_main.data() + 4, new_text.data(),
+                        std::min(new_text.size(), SWKBD_OUTPUT_BUFFER_SIZE - 4));
+        } else {
+            const u64 size = text->size() * 2 + sizeof(u64);
+            std::memcpy(output_sub.data(), &size, sizeof(u64));
+            std::memcpy(output_sub.data() + 8, text->data(),
+                        std::min(text->size() * 2, SWKBD_OUTPUT_BUFFER_SIZE - 8));
+
+            output_main[0] = INTERACTIVE_STATUS_OK;
+            std::memcpy(output_main.data() + 4, text->data(),
+                        std::min(text->size() * 2, SWKBD_OUTPUT_BUFFER_SIZE - 4));
+        }
+
+        complete = !config.text_check;
+        final_data = output_main;
+
+        if (complete) {
+            broker.PushNormalDataFromApplet(
+                std::make_shared<IStorage>(system, std::move(output_main)));
+            broker.SignalStateChanged();
+        } else {
+            broker.PushInteractiveDataFromApplet(
+                std::make_shared<IStorage>(system, std::move(output_sub)));
+        }
+    } else {
+        output_main[0] = 1;
+        complete = true;
+        broker.PushNormalDataFromApplet(std::make_shared<IStorage>(system, std::move(output_main)));
+        broker.SignalStateChanged();
+    }
+}
+} // namespace Service::AM::Applets

src/core/hle/service/am/applets/software_keyboard.h

@@ -0,0 +1,86 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+#include <string>
+#include <vector>
+
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+#include "common/swap.h"
+#include "core/hle/service/am/am.h"
+#include "core/hle/service/am/applets/applets.h"
+
+union ResultCode;
+
+namespace Core {
+class System;
+}
+
+namespace Service::AM::Applets {
+
+enum class KeysetDisable : u32 {
+    Space = 0x02,
+    Address = 0x04,
+    Percent = 0x08,
+    Slashes = 0x10,
+    Numbers = 0x40,
+    DownloadCode = 0x80,
+};
+
+struct KeyboardConfig {
+    INSERT_PADDING_BYTES(4);
+    std::array<char16_t, 9> submit_text;
+    u16_le left_symbol_key;
+    u16_le right_symbol_key;
+    INSERT_PADDING_BYTES(1);
+    KeysetDisable keyset_disable_bitmask;
+    u32_le initial_cursor_position;
+    std::array<char16_t, 65> header_text;
+    std::array<char16_t, 129> sub_text;
+    std::array<char16_t, 257> guide_text;
+    u32_le length_limit;
+    INSERT_PADDING_BYTES(4);
+    u32_le is_password;
+    INSERT_PADDING_BYTES(5);
+    bool utf_8;
+    bool draw_background;
+    u32_le initial_string_offset;
+    u32_le initial_string_size;
+    u32_le user_dictionary_offset;
+    u32_le user_dictionary_size;
+    bool text_check;
+    u64_le text_check_callback;
+};
+static_assert(sizeof(KeyboardConfig) == 0x3E0, "KeyboardConfig has incorrect size.");
+
+class SoftwareKeyboard final : public Applet {
+public:
+    explicit SoftwareKeyboard(Core::System& system_,
+                              const Core::Frontend::SoftwareKeyboardApplet& frontend_);
+    ~SoftwareKeyboard() override;
+
+    void Initialize() override;
+
+    bool TransactionComplete() const override;
+    ResultCode GetStatus() const override;
+    void ExecuteInteractive() override;
+    void Execute() override;
+
+    void WriteText(std::optional<std::u16string> text);
+
+private:
+    const Core::Frontend::SoftwareKeyboardApplet& frontend;
+
+    KeyboardConfig config;
+    std::u16string initial_text;
+    bool complete = false;
+    bool is_inline = false;
+    std::vector<u8> final_data;
+    Core::System& system;
+};
+
+} // namespace Service::AM::Applets

src/core/hle/service/am/applets/web_browser.cpp

@@ -0,0 +1,478 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/common_paths.h"
+#include "common/file_util.h"
+#include "common/logging/log.h"
+#include "common/string_util.h"
+#include "core/core.h"
+#include "core/file_sys/content_archive.h"
+#include "core/file_sys/mode.h"
+#include "core/file_sys/nca_metadata.h"
+#include "core/file_sys/patch_manager.h"
+#include "core/file_sys/registered_cache.h"
+#include "core/file_sys/romfs.h"
+#include "core/file_sys/system_archive/system_archive.h"
+#include "core/file_sys/vfs_vector.h"
+#include "core/frontend/applets/web_browser.h"
+#include "core/hle/kernel/process.h"
+#include "core/hle/result.h"
+#include "core/hle/service/am/am.h"
+#include "core/hle/service/am/applets/web_browser.h"
+#include "core/hle/service/filesystem/filesystem.h"
+#include "core/hle/service/ns/pl_u.h"
+
+namespace Service::AM::Applets {
+
+namespace {
+
+template <typename T>
+void ParseRawValue(T& value, const std::vector<u8>& data) {
+    static_assert(std::is_trivially_copyable_v<T>,
+                  "It's undefined behavior to use memcpy with non-trivially copyable objects");
+    std::memcpy(&value, data.data(), data.size());
+}
+
+template <typename T>
+T ParseRawValue(const std::vector<u8>& data) {
+    T value;
+    ParseRawValue(value, data);
+    return value;
+}
+
+std::string ParseStringValue(const std::vector<u8>& data) {
+    return Common::StringFromFixedZeroTerminatedBuffer(reinterpret_cast<const char*>(data.data()),
+                                                       data.size());
+}
+
+std::string GetMainURL(const std::string& url) {
+    const auto index = url.find('?');
+
+    if (index == std::string::npos) {
+        return url;
+    }
+
+    return url.substr(0, index);
+}
+
+WebArgInputTLVMap ReadWebArgs(const std::vector<u8>& web_arg, WebArgHeader& web_arg_header) {
+    std::memcpy(&web_arg_header, web_arg.data(), sizeof(WebArgHeader));
+
+    if (web_arg.size() == sizeof(WebArgHeader)) {
+        return {};
+    }
+
+    WebArgInputTLVMap input_tlv_map;
+
+    u64 current_offset = sizeof(WebArgHeader);
+
+    for (std::size_t i = 0; i < web_arg_header.total_tlv_entries; ++i) {
+        if (web_arg.size() < current_offset + sizeof(WebArgInputTLV)) {
+            return input_tlv_map;
+        }
+
+        WebArgInputTLV input_tlv;
+        std::memcpy(&input_tlv, web_arg.data() + current_offset, sizeof(WebArgInputTLV));
+
+        current_offset += sizeof(WebArgInputTLV);
+
+        if (web_arg.size() < current_offset + input_tlv.arg_data_size) {
+            return input_tlv_map;
+        }
+
+        std::vector<u8> data(input_tlv.arg_data_size);
+        std::memcpy(data.data(), web_arg.data() + current_offset, input_tlv.arg_data_size);
+
+        current_offset += input_tlv.arg_data_size;
+
+        input_tlv_map.insert_or_assign(input_tlv.input_tlv_type, std::move(data));
+    }
+
+    return input_tlv_map;
+}
+
+FileSys::VirtualFile GetOfflineRomFS(Core::System& system, u64 title_id,
+                                     FileSys::ContentRecordType nca_type) {
+    if (nca_type == FileSys::ContentRecordType::Data) {
+        const auto nca =
+            system.GetFileSystemController().GetSystemNANDContents()->GetEntry(title_id, nca_type);
+
+        if (nca == nullptr) {
+            LOG_ERROR(Service_AM,
+                      "NCA of type={} with title_id={:016X} is not found in the System NAND!",
+                      nca_type, title_id);
+            return FileSys::SystemArchive::SynthesizeSystemArchive(title_id);
+        }
+
+        return nca->GetRomFS();
+    } else {
+        const auto nca = system.GetContentProvider().GetEntry(title_id, nca_type);
+
+        if (nca == nullptr) {
+            LOG_ERROR(Service_AM,
+                      "NCA of type={} with title_id={:016X} is not found in the ContentProvider!",
+                      nca_type, title_id);
+            return nullptr;
+        }
+
+        const FileSys::PatchManager pm{title_id, system.GetFileSystemController(),
+                                       system.GetContentProvider()};
+
+        return pm.PatchRomFS(nca->GetRomFS(), nca->GetBaseIVFCOffset(), nca_type);
+    }
+}
+
+void ExtractSharedFonts(Core::System& system) {
+    static constexpr std::array<const char*, 7> DECRYPTED_SHARED_FONTS{
+        "FontStandard.ttf",
+        "FontChineseSimplified.ttf",
+        "FontExtendedChineseSimplified.ttf",
+        "FontChineseTraditional.ttf",
+        "FontKorean.ttf",
+        "FontNintendoExtended.ttf",
+        "FontNintendoExtended2.ttf",
+    };
+
+    for (std::size_t i = 0; i < NS::SHARED_FONTS.size(); ++i) {
+        const auto fonts_dir = Common::FS::SanitizePath(
+            fmt::format("{}/fonts", Common::FS::GetUserPath(Common::FS::UserPath::CacheDir)),
+            Common::FS::DirectorySeparator::PlatformDefault);
+
+        const auto font_file_path =
+            Common::FS::SanitizePath(fmt::format("{}/{}", fonts_dir, DECRYPTED_SHARED_FONTS[i]),
+                                     Common::FS::DirectorySeparator::PlatformDefault);
+
+        if (Common::FS::Exists(font_file_path)) {
+            continue;
+        }
+
+        const auto font = NS::SHARED_FONTS[i];
+        const auto font_title_id = static_cast<u64>(font.first);
+
+        const auto nca = system.GetFileSystemController().GetSystemNANDContents()->GetEntry(
+            font_title_id, FileSys::ContentRecordType::Data);
+
+        FileSys::VirtualFile romfs;
+
+        if (!nca) {
+            romfs = FileSys::SystemArchive::SynthesizeSystemArchive(font_title_id);
+        } else {
+            romfs = nca->GetRomFS();
+        }
+
+        if (!romfs) {
+            LOG_ERROR(Service_AM, "SharedFont RomFS with title_id={:016X} cannot be extracted!",
+                      font_title_id);
+            continue;
+        }
+
+        const auto extracted_romfs = FileSys::ExtractRomFS(romfs);
+
+        if (!extracted_romfs) {
+            LOG_ERROR(Service_AM, "SharedFont RomFS with title_id={:016X} failed to extract!",
+                      font_title_id);
+            continue;
+        }
+
+        const auto font_file = extracted_romfs->GetFile(font.second);
+
+        if (!font_file) {
+            LOG_ERROR(Service_AM, "SharedFont RomFS with title_id={:016X} has no font file \"{}\"!",
+                      font_title_id, font.second);
+            continue;
+        }
+
+        std::vector<u32> font_data_u32(font_file->GetSize() / sizeof(u32));
+        font_file->ReadBytes<u32>(font_data_u32.data(), font_file->GetSize());
+
+        std::transform(font_data_u32.begin(), font_data_u32.end(), font_data_u32.begin(),
+                       Common::swap32);
+
+        std::vector<u8> decrypted_data(font_file->GetSize() - 8);
+
+        NS::DecryptSharedFontToTTF(font_data_u32, decrypted_data);
+
+        FileSys::VirtualFile decrypted_font = std::make_shared<FileSys::VectorVfsFile>(
+            std::move(decrypted_data), DECRYPTED_SHARED_FONTS[i]);
+
+        const auto temp_dir =
+            system.GetFilesystem()->CreateDirectory(fonts_dir, FileSys::Mode::ReadWrite);
+
+        const auto out_file = temp_dir->CreateFile(DECRYPTED_SHARED_FONTS[i]);
+
+        FileSys::VfsRawCopy(decrypted_font, out_file);
+    }
+}
+
+} // namespace
+
+WebBrowser::WebBrowser(Core::System& system_, const Core::Frontend::WebBrowserApplet& frontend_)
+    : Applet{system_.Kernel()}, frontend(frontend_), system{system_} {}
+
+WebBrowser::~WebBrowser() = default;
+
+void WebBrowser::Initialize() {
+    Applet::Initialize();
+
+    LOG_INFO(Service_AM, "Initializing Web Browser Applet.");
+
+    LOG_DEBUG(Service_AM,
+              "Initializing Applet with common_args: arg_version={}, lib_version={}, "
+              "play_startup_sound={}, size={}, system_tick={}, theme_color={}",
+              common_args.arguments_version, common_args.library_version,
+              common_args.play_startup_sound, common_args.size, common_args.system_tick,
+              common_args.theme_color);
+
+    web_applet_version = WebAppletVersion{common_args.library_version};
+
+    const auto web_arg_storage = broker.PopNormalDataToApplet();
+    ASSERT(web_arg_storage != nullptr);
+
+    const auto& web_arg = web_arg_storage->GetData();
+    ASSERT_OR_EXECUTE(web_arg.size() >= sizeof(WebArgHeader), { return; });
+
+    web_arg_input_tlv_map = ReadWebArgs(web_arg, web_arg_header);
+
+    LOG_DEBUG(Service_AM, "WebArgHeader: total_tlv_entries={}, shim_kind={}",
+              web_arg_header.total_tlv_entries, web_arg_header.shim_kind);
+
+    ExtractSharedFonts(system);
+
+    switch (web_arg_header.shim_kind) {
+    case ShimKind::Shop:
+        InitializeShop();
+        break;
+    case ShimKind::Login:
+        InitializeLogin();
+        break;
+    case ShimKind::Offline:
+        InitializeOffline();
+        break;
+    case ShimKind::Share:
+        InitializeShare();
+        break;
+    case ShimKind::Web:
+        InitializeWeb();
+        break;
+    case ShimKind::Wifi:
+        InitializeWifi();
+        break;
+    case ShimKind::Lobby:
+        InitializeLobby();
+        break;
+    default:
+        UNREACHABLE_MSG("Invalid ShimKind={}", web_arg_header.shim_kind);
+        break;
+    }
+}
+
+bool WebBrowser::TransactionComplete() const {
+    return complete;
+}
+
+ResultCode WebBrowser::GetStatus() const {
+    return status;
+}
+
+void WebBrowser::ExecuteInteractive() {
+    UNIMPLEMENTED_MSG("WebSession is not implemented");
+}
+
+void WebBrowser::Execute() {
+    switch (web_arg_header.shim_kind) {
+    case ShimKind::Shop:
+        ExecuteShop();
+        break;
+    case ShimKind::Login:
+        ExecuteLogin();
+        break;
+    case ShimKind::Offline:
+        ExecuteOffline();
+        break;
+    case ShimKind::Share:
+        ExecuteShare();
+        break;
+    case ShimKind::Web:
+        ExecuteWeb();
+        break;
+    case ShimKind::Wifi:
+        ExecuteWifi();
+        break;
+    case ShimKind::Lobby:
+        ExecuteLobby();
+        break;
+    default:
+        UNREACHABLE_MSG("Invalid ShimKind={}", web_arg_header.shim_kind);
+        WebBrowserExit(WebExitReason::EndButtonPressed);
+        break;
+    }
+}
+
+void WebBrowser::ExtractOfflineRomFS() {
+    LOG_DEBUG(Service_AM, "Extracting RomFS to {}", offline_cache_dir);
+
+    const auto extracted_romfs_dir =
+        FileSys::ExtractRomFS(offline_romfs, FileSys::RomFSExtractionType::SingleDiscard);
+
+    const auto temp_dir =
+        system.GetFilesystem()->CreateDirectory(offline_cache_dir, FileSys::Mode::ReadWrite);
+
+    FileSys::VfsRawCopyD(extracted_romfs_dir, temp_dir);
+}
+
+void WebBrowser::WebBrowserExit(WebExitReason exit_reason, std::string last_url) {
+    if ((web_arg_header.shim_kind == ShimKind::Share &&
+         web_applet_version >= WebAppletVersion::Version196608) ||
+        (web_arg_header.shim_kind == ShimKind::Web &&
+         web_applet_version >= WebAppletVersion::Version524288)) {
+        // TODO: Push Output TLVs instead of a WebCommonReturnValue
+    }
+
+    WebCommonReturnValue web_common_return_value;
+
+    web_common_return_value.exit_reason = exit_reason;
+    std::memcpy(&web_common_return_value.last_url, last_url.data(), last_url.size());
+    web_common_return_value.last_url_size = last_url.size();
+
+    LOG_DEBUG(Service_AM, "WebCommonReturnValue: exit_reason={}, last_url={}, last_url_size={}",
+              exit_reason, last_url, last_url.size());
+
+    complete = true;
+    std::vector<u8> out_data(sizeof(WebCommonReturnValue));
+    std::memcpy(out_data.data(), &web_common_return_value, out_data.size());
+    broker.PushNormalDataFromApplet(std::make_shared<IStorage>(system, std::move(out_data)));
+    broker.SignalStateChanged();
+}
+
+bool WebBrowser::InputTLVExistsInMap(WebArgInputTLVType input_tlv_type) const {
+    return web_arg_input_tlv_map.find(input_tlv_type) != web_arg_input_tlv_map.end();
+}
+
+std::optional<std::vector<u8>> WebBrowser::GetInputTLVData(WebArgInputTLVType input_tlv_type) {
+    const auto map_it = web_arg_input_tlv_map.find(input_tlv_type);
+
+    if (map_it == web_arg_input_tlv_map.end()) {
+        return std::nullopt;
+    }
+
+    return map_it->second;
+}
+
+void WebBrowser::InitializeShop() {}
+
+void WebBrowser::InitializeLogin() {}
+
+void WebBrowser::InitializeOffline() {
+    const auto document_path =
+        ParseStringValue(GetInputTLVData(WebArgInputTLVType::DocumentPath).value());
+
+    const auto document_kind =
+        ParseRawValue<DocumentKind>(GetInputTLVData(WebArgInputTLVType::DocumentKind).value());
+
+    std::string additional_paths;
+
+    switch (document_kind) {
+    case DocumentKind::OfflineHtmlPage:
+    default:
+        title_id = system.CurrentProcess()->GetTitleID();
+        nca_type = FileSys::ContentRecordType::HtmlDocument;
+        additional_paths = "html-document";
+        break;
+    case DocumentKind::ApplicationLegalInformation:
+        title_id = ParseRawValue<u64>(GetInputTLVData(WebArgInputTLVType::ApplicationID).value());
+        nca_type = FileSys::ContentRecordType::LegalInformation;
+        break;
+    case DocumentKind::SystemDataPage:
+        title_id = ParseRawValue<u64>(GetInputTLVData(WebArgInputTLVType::SystemDataID).value());
+        nca_type = FileSys::ContentRecordType::Data;
+        break;
+    }
+
+    static constexpr std::array<const char*, 3> RESOURCE_TYPES{
+        "manual",
+        "legal_information",
+        "system_data",
+    };
+
+    offline_cache_dir = Common::FS::SanitizePath(
+        fmt::format("{}/offline_web_applet_{}/{:016X}",
+                    Common::FS::GetUserPath(Common::FS::UserPath::CacheDir),
+                    RESOURCE_TYPES[static_cast<u32>(document_kind) - 1], title_id),
+        Common::FS::DirectorySeparator::PlatformDefault);
+
+    offline_document = Common::FS::SanitizePath(
+        fmt::format("{}/{}/{}", offline_cache_dir, additional_paths, document_path),
+        Common::FS::DirectorySeparator::PlatformDefault);
+}
+
+void WebBrowser::InitializeShare() {}
+
+void WebBrowser::InitializeWeb() {
+    external_url = ParseStringValue(GetInputTLVData(WebArgInputTLVType::InitialURL).value());
+}
+
+void WebBrowser::InitializeWifi() {}
+
+void WebBrowser::InitializeLobby() {}
+
+void WebBrowser::ExecuteShop() {
+    LOG_WARNING(Service_AM, "(STUBBED) called, Shop Applet is not implemented");
+    WebBrowserExit(WebExitReason::EndButtonPressed);
+}
+
+void WebBrowser::ExecuteLogin() {
+    LOG_WARNING(Service_AM, "(STUBBED) called, Login Applet is not implemented");
+    WebBrowserExit(WebExitReason::EndButtonPressed);
+}
+
+void WebBrowser::ExecuteOffline() {
+    const auto main_url = Common::FS::SanitizePath(GetMainURL(offline_document),
+                                                   Common::FS::DirectorySeparator::PlatformDefault);
+
+    if (!Common::FS::Exists(main_url)) {
+        offline_romfs = GetOfflineRomFS(system, title_id, nca_type);
+
+        if (offline_romfs == nullptr) {
+            LOG_ERROR(Service_AM,
+                      "RomFS with title_id={:016X} and nca_type={} cannot be extracted!", title_id,
+                      nca_type);
+            WebBrowserExit(WebExitReason::WindowClosed);
+            return;
+        }
+    }
+
+    LOG_INFO(Service_AM, "Opening offline document at {}", offline_document);
+
+    frontend.OpenLocalWebPage(
+        offline_document, [this] { ExtractOfflineRomFS(); },
+        [this](WebExitReason exit_reason, std::string last_url) {
+            WebBrowserExit(exit_reason, last_url);
+        });
+}
+
+void WebBrowser::ExecuteShare() {
+    LOG_WARNING(Service_AM, "(STUBBED) called, Share Applet is not implemented");
+    WebBrowserExit(WebExitReason::EndButtonPressed);
+}
+
+void WebBrowser::ExecuteWeb() {
+    LOG_INFO(Service_AM, "Opening external URL at {}", external_url);
+
+    frontend.OpenExternalWebPage(external_url,
+                                 [this](WebExitReason exit_reason, std::string last_url) {
+                                     WebBrowserExit(exit_reason, last_url);
+                                 });
+}
+
+void WebBrowser::ExecuteWifi() {
+    LOG_WARNING(Service_AM, "(STUBBED) called, Wifi Applet is not implemented");
+    WebBrowserExit(WebExitReason::EndButtonPressed);
+}
+
+void WebBrowser::ExecuteLobby() {
+    LOG_WARNING(Service_AM, "(STUBBED) called, Lobby Applet is not implemented");
+    WebBrowserExit(WebExitReason::EndButtonPressed);
+}
+} // namespace Service::AM::Applets

src/core/hle/service/am/applets/web_browser.h

@@ -0,0 +1,87 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <optional>
+
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+#include "core/file_sys/vfs_types.h"
+#include "core/hle/result.h"
+#include "core/hle/service/am/applets/applets.h"
+#include "core/hle/service/am/applets/web_types.h"
+
+namespace Core {
+class System;
+}
+
+namespace FileSys {
+enum class ContentRecordType : u8;
+}
+
+namespace Service::AM::Applets {
+
+class WebBrowser final : public Applet {
+public:
+    WebBrowser(Core::System& system_, const Core::Frontend::WebBrowserApplet& frontend_);
+
+    ~WebBrowser() override;
+
+    void Initialize() override;
+
+    bool TransactionComplete() const override;
+    ResultCode GetStatus() const override;
+    void ExecuteInteractive() override;
+    void Execute() override;
+
+    void ExtractOfflineRomFS();
+
+    void WebBrowserExit(WebExitReason exit_reason, std::string last_url = "");
+
+private:
+    bool InputTLVExistsInMap(WebArgInputTLVType input_tlv_type) const;
+
+    std::optional<std::vector<u8>> GetInputTLVData(WebArgInputTLVType input_tlv_type);
+
+    // Initializers for the various types of browser applets
+    void InitializeShop();
+    void InitializeLogin();
+    void InitializeOffline();
+    void InitializeShare();
+    void InitializeWeb();
+    void InitializeWifi();
+    void InitializeLobby();
+
+    // Executors for the various types of browser applets
+    void ExecuteShop();
+    void ExecuteLogin();
+    void ExecuteOffline();
+    void ExecuteShare();
+    void ExecuteWeb();
+    void ExecuteWifi();
+    void ExecuteLobby();
+
+    const Core::Frontend::WebBrowserApplet& frontend;
+
+    bool complete{false};
+    ResultCode status{RESULT_SUCCESS};
+
+    WebAppletVersion web_applet_version;
+    WebExitReason web_exit_reason;
+    WebArgHeader web_arg_header;
+    WebArgInputTLVMap web_arg_input_tlv_map;
+
+    u64 title_id;
+    FileSys::ContentRecordType nca_type;
+    std::string offline_cache_dir;
+    std::string offline_document;
+    FileSys::VirtualFile offline_romfs;
+
+    std::string external_url;
+
+    Core::System& system;
+};
+
+} // namespace Service::AM::Applets

src/core/hle/service/am/applets/web_types.h

@@ -0,0 +1,178 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+#include <unordered_map>
+#include <vector>
+
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+#include "common/swap.h"
+
+namespace Service::AM::Applets {
+
+enum class WebAppletVersion : u32_le {
+    Version0 = 0x0,          // Only used by WifiWebAuthApplet
+    Version131072 = 0x20000, // 1.0.0 - 2.3.0
+    Version196608 = 0x30000, // 3.0.0 - 4.1.0
+    Version327680 = 0x50000, // 5.0.0 - 5.1.0
+    Version393216 = 0x60000, // 6.0.0 - 7.0.1
+    Version524288 = 0x80000, // 8.0.0+
+};
+
+enum class ShimKind : u32 {
+    Shop = 1,
+    Login = 2,
+    Offline = 3,
+    Share = 4,
+    Web = 5,
+    Wifi = 6,
+    Lobby = 7,
+};
+
+enum class WebExitReason : u32 {
+    EndButtonPressed = 0,
+    BackButtonPressed = 1,
+    ExitRequested = 2,
+    CallbackURL = 3,
+    WindowClosed = 4,
+    ErrorDialog = 7,
+};
+
+enum class WebArgInputTLVType : u16 {
+    InitialURL = 0x1,
+    CallbackURL = 0x3,
+    CallbackableURL = 0x4,
+    ApplicationID = 0x5,
+    DocumentPath = 0x6,
+    DocumentKind = 0x7,
+    SystemDataID = 0x8,
+    ShareStartPage = 0x9,
+    Whitelist = 0xA,
+    News = 0xB,
+    UserID = 0xE,
+    AlbumEntry0 = 0xF,
+    ScreenShotEnabled = 0x10,
+    EcClientCertEnabled = 0x11,
+    PlayReportEnabled = 0x13,
+    BootDisplayKind = 0x17,
+    BackgroundKind = 0x18,
+    FooterEnabled = 0x19,
+    PointerEnabled = 0x1A,
+    LeftStickMode = 0x1B,
+    KeyRepeatFrame1 = 0x1C,
+    KeyRepeatFrame2 = 0x1D,
+    BootAsMediaPlayerInverted = 0x1E,
+    DisplayURLKind = 0x1F,
+    BootAsMediaPlayer = 0x21,
+    ShopJumpEnabled = 0x22,
+    MediaAutoPlayEnabled = 0x23,
+    LobbyParameter = 0x24,
+    ApplicationAlbumEntry = 0x26,
+    JsExtensionEnabled = 0x27,
+    AdditionalCommentText = 0x28,
+    TouchEnabledOnContents = 0x29,
+    UserAgentAdditionalString = 0x2A,
+    AdditionalMediaData0 = 0x2B,
+    MediaPlayerAutoCloseEnabled = 0x2C,
+    PageCacheEnabled = 0x2D,
+    WebAudioEnabled = 0x2E,
+    YouTubeVideoWhitelist = 0x31,
+    FooterFixedKind = 0x32,
+    PageFadeEnabled = 0x33,
+    MediaCreatorApplicationRatingAge = 0x34,
+    BootLoadingIconEnabled = 0x35,
+    PageScrollIndicatorEnabled = 0x36,
+    MediaPlayerSpeedControlEnabled = 0x37,
+    AlbumEntry1 = 0x38,
+    AlbumEntry2 = 0x39,
+    AlbumEntry3 = 0x3A,
+    AdditionalMediaData1 = 0x3B,
+    AdditionalMediaData2 = 0x3C,
+    AdditionalMediaData3 = 0x3D,
+    BootFooterButton = 0x3E,
+    OverrideWebAudioVolume = 0x3F,
+    OverrideMediaAudioVolume = 0x40,
+    BootMode = 0x41,
+    WebSessionEnabled = 0x42,
+    MediaPlayerOfflineEnabled = 0x43,
+};
+
+enum class WebArgOutputTLVType : u16 {
+    ShareExitReason = 0x1,
+    LastURL = 0x2,
+    LastURLSize = 0x3,
+    SharePostResult = 0x4,
+    PostServiceName = 0x5,
+    PostServiceNameSize = 0x6,
+    PostID = 0x7,
+    PostIDSize = 0x8,
+    MediaPlayerAutoClosedByCompletion = 0x9,
+};
+
+enum class DocumentKind : u32 {
+    OfflineHtmlPage = 1,
+    ApplicationLegalInformation = 2,
+    SystemDataPage = 3,
+};
+
+enum class ShareStartPage : u32 {
+    Default,
+    Settings,
+};
+
+enum class BootDisplayKind : u32 {
+    Default,
+    White,
+    Black,
+};
+
+enum class BackgroundKind : u32 {
+    Default,
+};
+
+enum class LeftStickMode : u32 {
+    Pointer,
+    Cursor,
+};
+
+enum class WebSessionBootMode : u32 {
+    AllForeground,
+    AllForegroundInitiallyHidden,
+};
+
+struct WebArgHeader {
+    u16 total_tlv_entries{};
+    INSERT_PADDING_BYTES(2);
+    ShimKind shim_kind{};
+};
+static_assert(sizeof(WebArgHeader) == 0x8, "WebArgHeader has incorrect size.");
+
+struct WebArgInputTLV {
+    WebArgInputTLVType input_tlv_type{};
+    u16 arg_data_size{};
+    INSERT_PADDING_WORDS(1);
+};
+static_assert(sizeof(WebArgInputTLV) == 0x8, "WebArgInputTLV has incorrect size.");
+
+struct WebArgOutputTLV {
+    WebArgOutputTLVType output_tlv_type{};
+    u16 arg_data_size{};
+    INSERT_PADDING_WORDS(1);
+};
+static_assert(sizeof(WebArgOutputTLV) == 0x8, "WebArgOutputTLV has incorrect size.");
+
+struct WebCommonReturnValue {
+    WebExitReason exit_reason{};
+    INSERT_PADDING_WORDS(1);
+    std::array<char, 0x1000> last_url{};
+    u64 last_url_size{};
+};
+static_assert(sizeof(WebCommonReturnValue) == 0x1010, "WebCommonReturnValue has incorrect size.");
+
+using WebArgInputTLVMap = std::unordered_map<WebArgInputTLVType, std::vector<u8>>;
+
+} // namespace Service::AM::Applets

src/core/hle/service/am/idle.cpp

@@ -0,0 +1,26 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hle/service/am/idle.h"
+
+namespace Service::AM {
+
+IdleSys::IdleSys(Core::System& system_) : ServiceFramework{system_, "idle:sys"} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, nullptr, "GetAutoPowerDownEvent"},
+        {1, nullptr, "IsAutoPowerDownRequested"},
+        {2, nullptr, "Unknown2"},
+        {3, nullptr, "SetHandlingContext"},
+        {4, nullptr, "LoadAndApplySettings"},
+        {5, nullptr, "ReportUserIsActive"},
+    };
+    // clang-format on
+
+    RegisterHandlers(functions);
+}
+
+IdleSys::~IdleSys() = default;
+
+} // namespace Service::AM

src/core/hle/service/am/idle.h

@@ -0,0 +1,21 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/service.h"
+
+namespace Core {
+class System;
+}
+
+namespace Service::AM {
+
+class IdleSys final : public ServiceFramework<IdleSys> {
+public:
+    explicit IdleSys(Core::System& system_);
+    ~IdleSys() override;
+};
+
+} // namespace Service::AM

src/core/hle/service/am/omm.cpp

@@ -0,0 +1,48 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hle/service/am/omm.h"
+
+namespace Service::AM {
+
+OMM::OMM(Core::System& system_) : ServiceFramework{system_, "omm"} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, nullptr, "GetOperationMode"},
+        {1, nullptr, "GetOperationModeChangeEvent"},
+        {2, nullptr, "EnableAudioVisual"},
+        {3, nullptr, "DisableAudioVisual"},
+        {4, nullptr, "EnterSleepAndWait"},
+        {5, nullptr, "GetCradleStatus"},
+        {6, nullptr, "FadeInDisplay"},
+        {7, nullptr, "FadeOutDisplay"},
+        {8, nullptr, "GetCradleFwVersion"},
+        {9, nullptr, "NotifyCecSettingsChanged"},
+        {10, nullptr, "SetOperationModePolicy"},
+        {11, nullptr, "GetDefaultDisplayResolution"},
+        {12, nullptr, "GetDefaultDisplayResolutionChangeEvent"},
+        {13, nullptr, "UpdateDefaultDisplayResolution"},
+        {14, nullptr, "ShouldSleepOnBoot"},
+        {15, nullptr, "NotifyHdcpApplicationExecutionStarted"},
+        {16, nullptr, "NotifyHdcpApplicationExecutionFinished"},
+        {17, nullptr, "NotifyHdcpApplicationDrawingStarted"},
+        {18, nullptr, "NotifyHdcpApplicationDrawingFinished"},
+        {19, nullptr, "GetHdcpAuthenticationFailedEvent"},
+        {20, nullptr, "GetHdcpAuthenticationFailedEmulationEnabled"},
+        {21, nullptr, "SetHdcpAuthenticationFailedEmulation"},
+        {22, nullptr, "GetHdcpStateChangeEvent"},
+        {23, nullptr, "GetHdcpState"},
+        {24, nullptr, "ShowCardUpdateProcessing"},
+        {25, nullptr, "SetApplicationCecSettingsAndNotifyChanged"},
+        {26, nullptr, "GetOperationModeSystemInfo"},
+        {27, nullptr, "GetAppletFullAwakingSystemEvent"},
+    };
+    // clang-format on
+
+    RegisterHandlers(functions);
+}
+
+OMM::~OMM() = default;
+
+} // namespace Service::AM

src/core/hle/service/am/omm.h

@@ -0,0 +1,21 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/service.h"
+
+namespace Core {
+class System;
+}
+
+namespace Service::AM {
+
+class OMM final : public ServiceFramework<OMM> {
+public:
+    explicit OMM(Core::System& system_);
+    ~OMM() override;
+};
+
+} // namespace Service::AM

src/core/hle/service/am/spsm.cpp

@@ -0,0 +1,32 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hle/service/am/spsm.h"
+
+namespace Service::AM {
+
+SPSM::SPSM(Core::System& system_) : ServiceFramework{system_, "spsm"} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, nullptr, "GetState"},
+        {1, nullptr, "EnterSleep"},
+        {2, nullptr, "GetLastWakeReason"},
+        {3, nullptr, "Shutdown"},
+        {4, nullptr, "GetNotificationMessageEventHandle"},
+        {5, nullptr, "ReceiveNotificationMessage"},
+        {6, nullptr, "AnalyzeLogForLastSleepWakeSequence"},
+        {7, nullptr, "ResetEventLog"},
+        {8, nullptr, "AnalyzePerformanceLogForLastSleepWakeSequence"},
+        {9, nullptr, "ChangeHomeButtonLongPressingTime"},
+        {10, nullptr, "PutErrorState"},
+        {11, nullptr, "InvalidateCurrentHomeButtonPressing"},
+    };
+    // clang-format on
+
+    RegisterHandlers(functions);
+}
+
+SPSM::~SPSM() = default;
+
+} // namespace Service::AM

src/core/hle/service/am/spsm.h

@@ -0,0 +1,21 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/service.h"
+
+namespace Core {
+class System;
+}
+
+namespace Service::AM {
+
+class SPSM final : public ServiceFramework<SPSM> {
+public:
+    explicit SPSM(Core::System& system_);
+    ~SPSM() override;
+};
+
+} // namespace Service::AM

src/core/hle/service/am/tcap.cpp

@@ -0,0 +1,23 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hle/service/am/tcap.h"
+
+namespace Service::AM {
+
+TCAP::TCAP(Core::System& system_) : ServiceFramework{system_, "tcap"} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, nullptr, "GetContinuousHighSkinTemperatureEvent"},
+        {1, nullptr, "SetOperationMode"},
+        {2, nullptr, "LoadAndApplySettings"},
+    };
+    // clang-format on
+
+    RegisterHandlers(functions);
+}
+
+TCAP::~TCAP() = default;
+
+} // namespace Service::AM

src/core/hle/service/am/tcap.h

@@ -0,0 +1,21 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/hle/service/service.h"
+
+namespace Core {
+class System;
+}
+
+namespace Service::AM {
+
+class TCAP final : public ServiceFramework<TCAP> {
+public:
+    explicit TCAP(Core::System& system_);
+    ~TCAP() override;
+};
+
+} // namespace Service::AM