Intel CONTROLLERS 413808 - Manual (Page 375)

Intel ® 413808 and 413812 I/O Controllers in TPER Mode
October 2007 Developer’s Manual
Order Number: 317805-001US 375
Address Translation Unit (PCI Express)—Intel
®
413808 and 413812
3.17.96 Outbound Upper Memory Window Base Address Register 1 -
OUMBAR1
The OUMBAR1 register locates Outbound Memory Window 1 in a 4 Gbyte Memory
section in the 4138xx’s 64 Gbyte internal address space. When internal bus address
A[35:32] matches the value in OUMBAR1, 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
Express Link unmodified. The ATU constructs a 64 bit PCI address in conjunction with
the “Outbound Upper 32-bit Memory Window Translate Value Register 1 - OUMWTVR1”
on page 376 .
Table 236. Outbound Upper Memory Window Base Address Register 1 - OUMBAR1
Bit Default Description
31 1
2
Outbound Window 1 Enable - When set, the ATU Outbound Memory Window 1 claims internal bus
transactions when A[35:32] matches OUMBAR1[3:0].
30:28 000
2
Outbound Window 1 Function Number Mapping - Errors with Outbound Memory Window 1 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 3.4, “Big Endian Byte Swapping”
on page 255 for more details.
26:04 000 0000H Reserved
3:0 2H
Outbound Upper Memory Window Base Address 1 - This value represents bits 35 to 32 of the internal
bus address used to claim an outbound memory request.
Note: The ATUX 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 Offset
+310H