Abstract: Provided is a debugging system including: a processor; and a debugger arranged between the processor and an external bus to determine whether or not an address of a job request including an instruction request or a data access request transferred from the processor to the external bus is hit on a preset address, wherein if the address of the job request is hit on the preset address, the debugger does not transfer the job request to the external bus, so that the processor is allowed to be stopped.

Abstract: Provided is a method for running cache invalidation in a computer system including: checking whether or not the cache invalidation is in a range mode when the cache invalidation is started; resetting an internal count associated with the invalidation if the cache invalidation is in the range mode; accessing a cache entry; checking whether or not a tag is ‘hit’ as a result of the accessing to the cache entry; checking whether or not a state of the cache is dirty if the tag is ‘hit’; performing write operation on the memory and clearing the cache entry if the state of the cache is dirty; clearing the cache entry if the state of the cache is not dirty; incrementing the internal count by 1 if the tag is not ‘hit’ or if the cache entry is cleared; and ending the cache invalidation if the internal count exceeds a predetermined offset.