Processor Core Address Map B In Host Mode - Motorola MPC8240 User Manual

Address Map B
Processor
Local
memory space
PCI memory space
4GB - 32MB
PCI I/O space
PCI I/O space
CONFIG_ADDR
CONFIG_DATA
PCI Int Ack
ROM or Flash
Figure 3-1. Processor Core Address Map B in Host Mode
3-4
MPC8240 Memory Controller
0
Memory controller
Local
memory
cycles memory access
1GB
Memory select error
2GB
Clears A[31] and
forwards to PCI
Clears A[31:24] and
4GB - 32MB + 64KB
forwards to PCI I/O
4GB - 24MB
which is reserved
4GB - 20MB
PCI Configuration
4GB - 18MB
4GB - 17MB
Int Ack Broadcast PCI
4GB - 16MB
4GB
MPC8240 Integrated Processor User's Manual
Not forwarded
to PCI bus.
performs local
Memory Space
space except
0xFE01_0000–
0xFE7F_FFFF
Access
ROM Access
Reserved
PCI Memory Space
0
Not addressable by
processor
2GB
PCI memory space in
range
2 to 4GB - 32MB
4GB - 32MB
Not addressable by
processor
4GB - 16MB
If local ROM,
not addressable as
PCI memory.
If remote ROM,
PCI memory space
4GB
PCI I/O Space
0
I/O addresses in
0 to 64KB range
64KB
8MB
I/O addresses in
8MB to 12MB range
12MB
Not addressable by
processor
4GB