LSI Logic Confidential
7-4
Memory Mapping
Copyright © 2001, 2002 by LSI Logic Corporation. All rights reserved.
Figure 7.3
SPARC Processor Memory Map without External Host
Processor
7.3
Control Bus Address Mapping
The 16 Mbyte Control Bus (CBus) address space can be accessed
through different masters, as shown in Figures
through
. The
address range where CBus elements are located varies with the master
that is trying to access them.
CBus address space is divided into 256 regions of 16 K words each. The
resources in the Control Bus address space are the control registers,
status registers, Audio Memory (AMem), and RISC memory (Rmem). A
24-bit address offset is used to index into the CBus space shown in
Figures
through
shows the assignments of these
blocks to the various modules within the DMN-8600 device.
16 Mbyte CBus Space
256 Mbyte External Space
FFFF_FFFF
FF00_0000
FEFF_FFFF
8000_0000
9FFF_FFFF
9000_0000
8FFF_FFFF
256 Mbyte SDRAM Space
256 Mbyte External Space
0000_0000
1FFF_FFFF
1000_0000
0FFF_FFFF
256 Mbyte SDRAM Space
Cached
Accesses
Uncached
Accesses
Содержание DMN-8600
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