Intel, Bit default description – Intel CONTROLLERS 413808 User Manual
Page 214
Intel
®
413808 and 413812—Address Translation Unit (PCI-X)
Intel
®
413808 and 413812 I/O Controllers in TPER Mode
Developer’s Manual
October 2007
214
Order Number: 317805-001US
2.14.75 Outbound Upper Memory Window Base Address Register 2 -
OUMBAR2
The OUMBAR2 register locates Outbound Memory Window 2 in a 4 Gbyte Memory
section in the 4138xx 64 Gbyte internal address space. When A[35:32] of the internal
bus address matches the value in OUMBAR2[3:0], the ATU claims the transaction and
forward it over to the PCI interface.
Note:
In translating the internal bus address A[35:0], A[31:0] is forwarded over to the PCI
bus unmodified. The ATU constructs a 64 bit PCI address in conjunction with the
“Outbound Upper 32-bit Memory Window Translate Value Register 2 - OUMWTVR2” on
Table 102. Outbound Upper Memory Window Base Address Register 2- OUMBAR2
Bit
Default
Description
31
0
2
Outbound Window 2 Enable - When set, the ATU Outbound Memory Window 2 claims internal bus
transactions when A[35:32] matches OUMBAR2[3:0].
30:28
000
2
Outbound Window 2 Function Number Mapping - Errors with Outbound Memory Window 2 transactions
(PCI or Internal Bus) is associated with the function number contained in this field.
27
0
Big Endian Byte Swap enable - When set the ATU performs a byte swap on all read/write transactions
through this BAR. When clear, no swap is performed. Refer to
Section 2.3, “Big Endian Byte Swapping”
for more details.
26:04
000 0000H Reserved
3:0
3H
Outbound Upper Memory Window Base Address 2 - This value represents bits 35 to 32 of the internal
bus address used to claim an outbound memory request.
Note:
The ATUE has the same default value. When both ATUs exist and the outbound windows of the
both ATUs are enabled, the bit field must be reprogrammed to avoid a conflict.
PCI
IOP
Attributes
Attributes
28
24
20
16
12
8
4
0
31
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rv
rw
rw
rw
rw
rw
rw
rw
rw
Attribute Legend:
RV = Reserved
PR = Preserved
RS = Read/Set
RW = Read/Write
RC = Read Clear
RO = Read Only
NA = Not Accessible
Internal Bus Address
+318H