Abstract:
This invention combines a multicore shared memory controller and an asynchronous protocol converting bridge to create a very efficient heterogeneous multi-processor system. After traversing the protocol converting bridge the commands travel through the regular processor port. This allows the interconnect to remain unchanged while having any combination of different processors connected. This invention tightly integrates all of the processors into the same memory controller/interconnect.
Abstract:
This invention speeds operation for coherence writes to shared memory. This invention immediately commits to the memory endpoint coherence write data. Thus this data will be available earlier than if the memory controller stalled this write pending snoop responses. This invention computes write enable strobes for the coherence write data based upon the cache dirty tags. This invention initiates a snoop cycle based upon the address of the coherence write. The stored write enable strobes enable determination of which data to write to the endpoint memory upon a cached and dirty snoop response.
Abstract:
An asynchronous dual domain bridge is implemented between the cache coherent master and the coherent system interconnect. The bridge has 2 halves, one in each clock/powerdown domain—master and interconnect. The asynchronous bridge is aware of the endian view used by each individual processor within the attached subsystem, and can perform the appropriate endian conversion on each processor's transactions to adapt the transaction to/from the endian view used by the interconnect.