CHAPTER 2 VR4120A
116 Preliminary User’s Manual S15543EJ1V0UM
2.4.3 Physical address spaceSo VR4120A core uses a 32-bit address, that the processor physical address space encompasses 4 Gbytes. TheVR4120A uses this 4-Gbyte physical address space as shown in Figure 2-31.Figure 2-31.
µ
µµ
µ
PD98502 Physical Address Space
PCI Controller
(For PCI Window)
RFU
SDRAM
1000_0000H
System Controller
USB Controller
Ethernet Controller #1
RFU
RFU
Boot ROM/Flash
Mirror of
0000_0000H - 1FFF_FFFF
0FFF_FFFFH
1000_1000H
1000_0FFFH
1000_2000H
1000_1FFFH
1000_3000H
1000_2FFFH
2000_0000H
1FFF_FFFFH
FFFF_FFFFH
1F00_0000H
1EFF_FFFFH
1002_0000H
1000_FFFFH
ATM Cell P rocesso r
1001_0000H
1001_FFFFH
0000_0000H
4 KB
4 KB
4 KB
64 KB
16 MB
256 MB
1000_4000H
1000_3FFFH
4 KB
Actual size of PR OM/Flash is m ax. 8 MB.
Configuration:
1 MB: 1FCF_FFFFH-1FC0_0000H
2 MB: 1FDF_FFFFH-1FC0_0000H
Actual size of SDRAM is max. 32 MB.
Configuration:
04 MB: 003F_FFFFH-0000_0000H
08 MB: 007F_FFFFH-0000_0000H
16 MB: 00FF_FFFFH-0000_0000H
32 MB: 01FF_FFFFH-0000_0000H
4 MB: 1FFF_FFFFH-1FC0_0000H
8 MB: 1FFF_FFFFH-1F80_0000H
Ethernet Controller #2
4 KB
PCI Controller
(For Register)
1000_4FFFH
1000_5000H
100F_FFFFH
1010_0000H
102F_FFFFH
2 MB
1030_0000H
IBUS Target Address Range