Programming the MVME230x
4-2
4
Processor Bus Memory Map
The processor memory map configuration is under the control of
the Raven bridge controller ASIC and the Falcon memory controller
chip set. The Raven and Falcon devices adjust system mapping to
suit a given application via programmable map decoder registers.
At system power-up or reset, a default processor memory map
takes over.
Default Processor Memory Map
The default processor memory map that is valid at power-up or
reset remains in effect until reprogrammed for specific
applications. Table 4-1 defines the entire default map ($00000000 to
$FFFFFFFF).
Notes
The first 1MB of Flash bank A (soldered 2MB or 4MB
Flash) appears in this range after a reset if the
rom_b_rv
control bit in the FalconÕs ROM B Base/Size register is
cleared. If the
rom_b_rv
control bit is set, this address
range maps to Flash bank B (socketed 1MB Flash).
Table 4-1. Processor Default View of the Memory Map
Processor Address
Size
DeÞnition
Start
End
00000000
7FFFFFFF
2GB
Not Mapped
80000000
8001FFFF
128KB
PCI/ISA I/O Space
80020000
FEF7FFFF
2GB-16MB-640KB
Not Mapped
FEF80000
FEF8FFFF
64KB
Falcon Registers
FEF90000
FEFEFFFF
384KB
Not Mapped
FEFF0000
FEFFFFFF
64KB
Raven Registers
FF000000
FFEFFFFF
15MB
Not Mapped
FFF00000
FFFFFFFF
1MB
Flash Bank A or Bank B
(See Not
e)
Содержание MVME2301
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