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cpu_families.rst

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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)

  • Radix MMU (POWER9 and later)

  • 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    |
+--------------+
       |
       |
       v
+--------------+
|    POWER9    |
+--------------+
       |
       |
       v
+--------------+
|   POWER10    |
+--------------+


+---------------+
| 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     |
+--------------+