Processor Configuration Registers
Intel
®
Core
TM
i7-660UE, i7-620LE/UE, i7-610E, i5-520E, i3-330E and Intel
®
Celeron
®
Processor P4505, U3405 Series
Datasheet Addendum
August 2010
100
Document Number: 323178-003
6.2.19
PMBASEU6 - Prefetchable Memory Base Address Upper
B/D/F/Type:
0/6/0/PCI
Address Offset:
28-2Bh
Default Value:
00000000h
Access:
RW
Size:
32 bits
The functionality associated with this register is present in the PEG design
implementation.
This register in conjunction with the corresponding Upper Base Address register
controls the CPU to PCI Express-G prefetchable memory access routing based on the
following formula:
PREFETCHABLE_MEMORY_BASE =< address =< PREFETCHABLE_MEMORY_LIMIT
The upper 12 bits of this register are read/write and correspond to address bits
A[31:20] of the 40-bit address. The lower 8 bits of the Upper Base Address register are
read/write and correspond to address bits A[39:32] of the 40-bit address. This register
must be initialized by the configuration software. For the purpose of address decode
address bits A[19:0] are assumed to be 0. Thus, the bottom of the defined memory
address range is aligned to a 1-MB boundary.
Table 42. PMBASEU6 - Prefetchable Memory Base Address Upper Register
Bit
Access
Default
Value
RST/
PWR
Description
31:0
RW
00000000h
Core
Prefetchable Memory Base Address (MBASEU)
Corresponds to A[63:32] of the lower limit of the prefetchable
memory range that is passed to PCI Express-G.