User guide

Figure 5–6 Scatter-Gather Map Translation of PCI Bus Address to System Bus
Address
LJ03957A.AI
31
n 13 12 0005 04
OffsetPeripheral Page NumberPCI Address
33 07-10 -11
0000T_Base
Compare
sysBus Base
Address
(Translated
Base Register)
33 03-10 -11
nn
nn
Scatter-Gather
Map Address
Driven on sysBus
33 13 1232 05
OffsetsysBus Page Number
Physical Memory
Location Driven
on sysBus
20 01
Scatter-Gather Entry
Scatter-Gather
Map in Main
Memory
6. Bit <0> is the valid bit for the page table entry.
System Address Mapping 5–21