Patent ID: 7454578
Filing Date: 2008-11-18
Classification: G06F

Abstract:
1. A method of data processing in a cache coherent data processing system including at least first and second coherency domains and a memory, said method comprising: a master in the first coherency domain of the cache coherent data processing system selecting a scope of an initial broadcast of an operation specifying a request address allocated to the memory from among a first scope including only the first coherency domain and a second scope including both the first and second coherency domains, wherein said selecting includes selecting the scope based at least in part upon whether said memory to which the request address is allocated belongs to said first coherency domain; and the master performing an initial broadcast of the operation within the cache coherent data processing system utilizing the selected scope, wherein said performing an initial broadcast includes the master initiating broadcast of the operation within the first coherency domain and wherein said request address is a real address.