Windows Wdk Info

The error message was opaque: "Device failed to reinitialize after D3 hot reset. Return code 0x80070005."

NTSTATUS ReadRegister( PDEVICE_OBJECT DeviceObject, ULONG RegisterOffset, PULONG Value) { PGRAPHICS_DEVICE_EXTENSION devExt = DeviceObject->DeviceExtension; // Map the register space PUCHAR mappedAddr = MmMapIoSpace( devExt->PhysicalRegisterBase + RegisterOffset, sizeof(ULONG), MmNonCached ); windows wdk

DPC—Deferred Procedure Call. A mechanism for drivers to complete work at a lower IRQL after a high-priority interrupt. If a DPC took too long (more than one second, in practice), the kernel's watchdog timer would trigger a BSOD. The error message was opaque: "Device failed to