Specifications

A–18 System Address Mapping
Subject to Change – 17 January 1997
21164 Address Space
Figure A–10 PCI Sparse I/O Space Address Translation (Region A)
The high-order PCI address bits for region B are handled as follows:
•
This region has addr<34:30> equal to 10111
2
, and addresses 32MB of PCI
sparse I/O space that can be relocated.
•
This 32MB segment is relocated by assigning ad<31:25> equal to
HAE_IO<31:25>, as shown in Figure A–11.
SBZ
PCI Address
4 3
Length in Bytes
Byte Offset
LJ-04268.AI
1
1
21164 Address
0 0
21164
int4_valid
31 02 01 00
34 33 05 04 03 02 00
39 38
35
060708
03
32 31
25 24
30 29
0110
0000000
<29:8>