CPU Families

This document tries to summarise some of the different cpu families that exist and are supported by arch/powerpc.

Book3S (aka sPAPR)

• Hash MMU (except 603 and e300)

• Software loaded TLB (603 and e300)

• Selectable Software loaded TLB in addition to hash MMU (755, 7450, e600)

• Mix of 32 & 64 bit:

  +--------------+                 +----------------+
  |  Old POWER   | --------------> | RS64 (threads) |
  +--------------+                 +----------------+
         |
         |
         v
  +--------------+                 +----------------+      +------+
  |     601      | --------------> |      603       | ---> | e300 |
  +--------------+                 +----------------+      +------+
         |                                 |
         |                                 |
         v                                 v
  +--------------+    +-----+      +----------------+      +-------+
  |     604      |    | 755 | <--- |    750 (G3)    | ---> | 750CX |
  +--------------+    +-----+      +----------------+      +-------+
         |                                 |                   |
         |                                 |                   |
         v                                 v                   v
  +--------------+                 +----------------+      +-------+
  | 620 (64 bit) |                 |      7400      |      | 750CL |
  +--------------+                 +----------------+      +-------+
         |                                 |                   |
         |                                 |                   |
         v                                 v                   v
  +--------------+                 +----------------+      +-------+
  |  POWER3/630  |                 |      7410      |      | 750FX |
  +--------------+                 +----------------+      +-------+
         |                                 |
         |                                 |
         v                                 v
  +--------------+                 +----------------+
  |   POWER3+    |                 |      7450      |
  +--------------+                 +----------------+
         |                                 |
         |                                 |
         v                                 v
  +--------------+                 +----------------+
  |    POWER4    |                 |      7455      |
  +--------------+                 +----------------+
         |                                 |
         |                                 |
         v                                 v
  +--------------+     +-------+   +----------------+
  |   POWER4+    | --> |  970  |   |      7447      |
  +--------------+     +-------+   +----------------+
         |                 |               |
         |                 |               |
         v                 v               v
  +--------------+     +-------+   +----------------+
  |    POWER5    |     | 970FX |   |      7448      |
  +--------------+     +-------+   +----------------+
         |                 |               |
         |                 |               |
         v                 v               v
  +--------------+     +-------+   +----------------+
  |   POWER5+    |     | 970MP |   |      e600      |
  +--------------+     +-------+   +----------------+
         |
         |
         v
  +--------------+
  |   POWER5++   |
  +--------------+
         |
         |
         v
  +--------------+       +-------+
  |    POWER6    | <-?-> | Cell  |
  +--------------+       +-------+
         |
         |
         v
  +--------------+
  |    POWER7    |
  +--------------+
         |
         |
         v
  +--------------+
  |   POWER7+    |
  +--------------+
         |
         |
         v
  +--------------+
  |    POWER8    |
  +--------------+
  
  
  +---------------+
  | PA6T (64 bit) |
  +---------------+
  

IBM BookE

• Software loaded TLB.

• All 32 bit:

  +--------------+
  |     401      |
  +--------------+
         |
         |
         v
  +--------------+
  |     403      |
  +--------------+
         |
         |
         v
  +--------------+
  |     405      |
  +--------------+
         |
         |
         v
  +--------------+
  |     440      |
  +--------------+
         |
         |
         v
  +--------------+     +----------------+
  |     450      | --> |      BG/P      |
  +--------------+     +----------------+
         |
         |
         v
  +--------------+
  |     460      |
  +--------------+
         |
         |
         v
  +--------------+
  |     476      |
  +--------------+
  

Motorola/Freescale 8xx

• Software loaded with hardware assist.

• All 32 bit:

  +-------------+
  | MPC8xx Core |
  +-------------+
  

Freescale BookE

• Software loaded TLB.

• e6500 adds HW loaded indirect TLB entries.

• Mix of 32 & 64 bit:

  +--------------+
  |     e200     |
  +--------------+
  
  
  +--------------------------------+
  |              e500              |
  +--------------------------------+
                  |
                  |
                  v
  +--------------------------------+
  |             e500v2             |
  +--------------------------------+
                  |
                  |
                  v
  +--------------------------------+
  |        e500mc (Book3e)         |
  +--------------------------------+
                  |
                  |
                  v
  +--------------------------------+
  |          e5500 (64 bit)        |
  +--------------------------------+
                  |
                  |
                  v
  +--------------------------------+
  | e6500 (HW TLB) (Multithreaded) |
  +--------------------------------+
  

IBM A2 core

• Book3E, software loaded TLB + HW loaded indirect TLB entries.

• 64 bit:

  +--------------+     +----------------+
  |   A2 core    | --> |      WSP       |
  +--------------+     +----------------+
          |
          |
          v
  +--------------+
  |     BG/Q     |
  +--------------+