21555 Bar Summary - Intel 21555 User Manual

4.6

21555 Bar Summary

Table 12 shows a summary of the 21555 BARs.
Table 12. Bar Summary
Bar
Primary CSR and Downstream
Memory 0
Primary CSR I/O
Secondary CSR Memory
Secondary CSR I/O
Primary Expansion ROM
Downstream I/O or Memory 1
Downstream Memory 2
Downstream Memory 3
Upstream I/O or Memory 0
Upstream Memory 1
Upstream Memory 2
21555 Non-Transparent PCI-to-PCI Bridge User Manual
Size
4 KB to 2 GB
256 bytes
4 KB
256 bytes
4 KB to 16 MB
64 bytes to 256 bytes (I/O) or
4 KB to 2 GB (memory)
4 KB to 2 GB
63
4 KB to 2 bytes
64 bytes to 256 bytes (I/O) or
4 KB to 2 GB (memory)
4 KB to 2 GB
64 KB to 16 MB
Address Decoding
Address Translation
Low 4 KB: None
Above 4KB boundary: Direct Offset
—
—
—
—
Direct Offset
Direct Offset
Direct Offset ( < 4 GB)
None (Š4 GB)
Direct Offset
Direct Offset
Lookup Table
47