prefetched into an address field 302 of the allocated response buffer 202 the prefetched cache line data will be retired either to the l1p cache 122 or l2pf cache 126 the l1p cache 122 issues a l1p loadrequest 208 to the l2 cache 124 to load a cache line from the l2 cache 124 the l1p loadrequest 208 signal is also provided to the l2pf 126 the l2pf 126 sets a l1dloadcollide field 306 of a response buffer 202 if a loadrequest 208 generated by the l1p cache 122 collides with a valid value in the address 302 field the bus interface unit 128 generates snoop requests 214 in response to transactions initiated by external agents on the bus 134 or in response to certain transactions generated internally by the caches of the microprocessor 100 the snoop requests 214 are provided to the l1p cache 122 l2 cache 124 and l2pf 126 the l2pf 126 sets a snoophit field 308 of a response buffer 202 if a snoop request 214 collides with a valid value in the address 302 field the bus interface unit 128 provides a noretry signal 216 associated with each of the response buffers 202 to the l2pf 126 the bus interface unit 128 decodes encoded bits during the response phase on the bus 134 that.