primary caches. Each instruction and data cache range in size from 8 Kbytes to 32 Kbytes; therefore, the number of virtual address bits used to index the cache depends on the cache size. For example, VA(12:4) accesses a 8-Kbyte page tag in a cache with a 4-word line (VA(12) addresses 8 Kbytes and VA(4) provides quadword resolution); similarly, VA(14:5) accesses an 8-word tag: VA(5) provides octalword access in a 32-Kbyte cache (VA(14) addresses 32 Kbytes).
Figure 11-5 Primary Cache Data and Tag Organization
