Native Versus Stream Loading Mechanism Generally Native device drivers are loaded in the GWES process space by registry keys Bus drivers loaded by Device.exe using registry Installable, Stream, and Hybrid drivers in Device.exe by either bus driver or Registry Enumerator ĭevice Manager User-level process that runs continously Separate application that interacts with the kernel, the registry and stream interface driver DLLs Provides ActivateDevice and DeactivateDevice APIs ĭevice Manager Contains the IO Resource Manager Loads the registry enumerator (RegEnum.dll) which in turn loads the drivers based on the registry Provides power notification callbacks Tracks all loaded devices and issues device interface notifications for insertion and removal ĭevice Manager Device Driver Loading Process DEVICE.EXE Kernel I/O Resource Manager (part of Device.exe) REGENUM.DLL PCIBUS.DLL loads loads loads DEVICE.EXE I/O Resource Manager (part of Device.exe) REGENUM.DLL PCIBUS.DLL What Is A Driver In Windows CE Simply a DLL with a well defined set of entry points Hosted by a Device Manager process space (sometimes GWES) Interface to apps via CreateFile (Streams – optional) Typically handle interrupts via dedicated thread (IST) Synchronization between apps and ISTs via criticalsections and mutexes Driver can have multiple simultaneous threads active Windows CE Architecture OEM Hardware Embedded Shell Applications WIN32 APIs COREDLL, WINSOCK, OLE, COMMCTRL, COMMDLG, WININET, TAPI Windows CE Shell Services Remote Connectivity Kernel Library IrDA GWES Device Manager File Manager TCP/IP OAL Bootloader Drivers Device drivers File drivers Microsoft OEM ISV Network drivers NET’s Installable ISRs (IISR) Bus Drivers Windows CE Driver Architecture Jay Loney Program Manager Windows CE Drivers JayLoney Īgenda Driver Architecture Device, Regenum, Loading Model, Power management Windows CE versus WDM Memory and CEDDK Basic Interrupt Architecture Windows CE.
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