Specifications

9 March 1999 – Subject To Change System Address Space A–21
PCI Sparse Memory Space
The high-order ad<31:26> are obtained from either the hardware extension register
(HAE_MEM) or the 21164 address depending on sparse-space regions, as shown in
Table A–7. See the 21174 Core Logic Chip Technical Reference Manual for more
information about the 21174 HAE_MEM CSR.
Figure A–9 shows the mapping for region 1.
Figure A–9 PCI Memory Sparse-Space Address Generation – Region 1
Figure A–10 shows the mapping for region 2.
Table A–7 PCI Address Mapping
21164
Address Region ad
<31> <30> <29> <28> <27> <26>
80.0000.0000 to
83.FFFF.FFFF
1 H A E _ M E M
<31>
H A E _ M E M
<30>
H A E _ M E M
<29>
CPU<33> CPU<32> CPU<31>
84.0000.0000 to
84.FFFF.FFFF
2 H A E _ M E M
<15>
H A E _ M E M
<14>
H A E _ M E M
<13>
H A E _ M E M
<12>
H A E _ M E M
<11>
CPU<31>
85.0000.0000 to
85.FFFF.FFFF
3 H A E _ M E M
<7>
H A E _ M E M
<6>
H A E _ M E M
<5>
H A E _ M E M
<4>
H A E _ M E M
<3>
H A E _ M E M
<2>
SBZ
PCI Address
4 3
Length in Bytes
Byte Offset
HAE_MEM CSR
PCI QW Address
LJ04265A.AI4
1
0
21164 Address
0 0
21164
int4_valid
31 02 01 00
34 33 05 04 03 02 00
39 38
35
060708
31 29 28 00
03
29 28