Processor Users Manual

MOTOROLA Chapter 3. Memory Map 3-1

Chapter 3

Memory Map

The MPC8260's internal memory resources are mapped within a contiguous block of

memory. The size of the internal space in the MPC8260 is 128 Kbytes. The location of this

block within the global 4-Gbyte real memory space can be mapped on 128 Kbytes

resolution through an implementation speciÞc special register called the internal memory

map register (IMMR). For more information, see Section 4.3.2.7, ÒInternal Memory Map

Table 3-1 deÞnes the internal memory map of the MPC8260.

Table 3-1. Internal Memory Map

Internal

Address

Abbreviation Name Size Section/Page Number

CPM Dual-Port RAM

00000Ð03FFF DPRAM1 Dual-port RAM 16 Kbytes 13.5/13-15

04000Ð07FFF Reserved Ñ 16 Kbytes Ñ

08000Ð08FFF DPRAM2 Dual-port RAM 4 Kbytes 13.5/13-15

09000Ð0AFFF Reserved Ñ 8 Kbytes Ñ

0B000Ð0BFFF DPRAM3 Dual-port RAM 4 Kbytes 13.5/13-15

0C000Ð0FFFF Reserved Ñ 16 Kbytes Ñ

General SIU

10000 SIUMCR SIU module conÞguration register 32 bits 4.3.2.6/4-31

10004 SYPCR System protection control register 32 bits 4.3.2.8/4-35

10008 Reserved Ñ 6 bytes Ñ

1000E SWSR Software service register 16 bits 4.3.2.9/4-36

10010Ð10023 Reserved Ñ 20 bytes Ñ

10024 BCR Bus conÞguration register 32 bits 4.3.2.1/4-25

10028 PPC_ACR 60x bus arbiter conÞguration register 8 bits 4.3.2.2/4-28

1002C PPC ALRH 60x bus arbitration-level register high

(Þrst 8 clients)

32 bits 4.3.2.3/4-28