How to find CPU-core information on Sun Solaris

Here is 4 CPU, 16 cores...

$ prtdiag -v
System Configuration:  Sun Microsystems  sun4u SPARC Enterprise M9000 Server
System clock frequency: 960 MHz
Memory size: 20480 Megabytes
==================================== CPUs ====================================
      CPU                 CPU                         Run    L2$    CPU   CPU
LSB   Chip                 ID                         MHz     MB    Impl. Mask
---   ----  ----------------------------------------  ----   ---    ----- ----
 00     2     16,  17,  18,  19                       2280   5.0        6  146
 02     1     72,  73,  74,  75                       2280   5.0        6  146
 03     2    112, 113, 114, 115                       2280   5.0        6  146
 04     3    152, 153, 154, 155                       2280   5.0        6  146