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21164 Byte/Word PCI Space
Figure 1–6 21174 CSR Space
PCI Configuration Space
39
38
35
34 33 32
1
0
X
0
0
1
1 1
CPU Address
31
30
29
28
Size (GB)
0
0
0
0.5
0
0
1
0.5
0
1
0
0
0.25
0
1
0
1
0.25
0
1
1
0
0.25
0
1
1
1
0.25
1
2.00
1.4 21164 Byte/Word PCI Space
The 21164 supports byte/word instructions that allow software to perform byte gran-
ularity transactions to and from I/O space without using sparse address space. This
space is divided into four regions: memory, I/O, configuration – type 0, and configu-
ration – type 1, as shown in Figure 1–7.
System Address Space
A–12
31
28 27
CSR
Space
Contents
PCI Configuration Space
PCI IACK/Special Cycle
21174 Main CSRs
Main Memory Control CSRs
21174 Address Translation
Reserved
Miscellaneous
Address
7
6
3
2 1 0
Size
0
0
0
FM-06062.AI4
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