ExceptionServer

BeginModifyMemoryMappedHardware EndModifyMemoryMappedHardware InitExceptionServer RegisterHandler RegisterSWIntHandler RegisteredHandler UnregisterHandler UnregisterSWIntHandler

Attributes

Class ExceptionServer defines no new attributes.

Fields

instance ExceptionServer tag;
end instance;

#endif
Define Class ExceptionServer;
    inherits from Object;

    class operation InitExceptionServer();
        // call this instead of Init since it takes a class number as self
    class operation RegisterHandler(exceptionNumber: UnsignedShort; function: ExceptionFunction; params: Pointer);      
        // registers routine to be run (and passed params) when given exception occurs
    class operation UnregisterHandler(exceptionNumber: UnsignedShort; function: ExceptionFunction); 
        // unregister that routine
    class operation RegisteredHandler(exceptionNumber: UnsignedShort; var function: ExceptionFunction; var params: Pointer);    
        // returns the registered routine and its params for a given exception
        // note: this assumes that only one handler may register for a particular exception.
#ifdef MIPS_EMBEDDED
    class operation RegisterSWIntHandler(high: Boolean; function: ExceptionFunction; params: Pointer);      
        // registers routine to be run (and passed params) when software interrupt occurs
        // the argument, high, indicates which of the two mips software interrupts is being referenced
    class operation UnregisterSWIntHandler(high: Boolean; function: ExceptionFunction); 
        // unregister the routine associated with the mips software interrupt indicated by the argument, high
#endif

    intrinsic BeginModifyMemoryMappedHardware(): Unsigned;
        // Put the device into a state such that accesses to memory-mapped hardware will
        // not cause protection exceptions.
        // Must always be paired with a corresponding call to EndModifyMemoryMappedHardware
    intrinsic EndModifyMemoryMappedHardware(lastStatus: Unsigned);
        // MUST be called with the lastStatus value returned from the corresponding
        // call to BeginModifyHardwareRegisters

end class;