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Commit 91a6151b authored by Michael Ellerman's avatar Michael Ellerman Committed by Benjamin Herrenschmidt
Browse files

powerpc: Add cpu family documentation 



This patch adds some documentation on the different cpu families
supported by arch/powerpc.

Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 736256e4

Documentation/powerpc/cpu_families.txt

0 → 100644
+221 −0
Original line number Diff line number Diff line 
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

 - Mix of 32 & 64 bit



   +--------------+                 +----------------+

   |  Old POWER   | --------------> | RS64 (threads) |

   +--------------+                 +----------------+

          |

          |

          v

   +--------------+                 +----------------+      +------+

   |     601      | --------------> |      603       | ---> | e300 |

   +--------------+                 +----------------+      +------+

          |                                 |

          |                                 |

          v                                 v

   +--------------+                 +----------------+      +-------+

   |     604      |                 |    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     |

   +--------------+