Datasheet

Processor Configuration Registers
32 Datasheet, Volume 2
2.3.4.5.2 Case 2 – Greater than 4 GB of Physical Memory
In this case the amount of memory remapped is the range between TOLUD and 4 GB.
This physical memory will be mapped to the logical address range defined between the
REMAPBASE and the REMAPLIMIT registers.
Figure 2-6. Case 2 – Greater than 4 GB of Physical Memory
Main
Memory
Add Range
OS
VISIBLE
< 4GB
PCI
Memory
Add. Range
(subtractively
decoded to
DMI)
Host/System View
Physical Memory
(DRAM Controller View)
TSEG
0
0
TSEG BASE
GFX Stolen
(0-256 MB)
ME-UMA
TOM
GFX GTT Stolen BASE
MESEG BASE
1 MB aligned
1 MB aligned
OS invisible
Reclaim
1 MB aligned
for reclaim
1 MB aligned
4 GB
FEC0_0000
1 MB aligned
TOUUD BASE
1 MB aligned
GFX GTT
STOLEN
(0-2 MB)
GFX Stolen BASE
1 MB aligned
TSEG
(0-8 MB)
Legacy
Add. Range
1 MB
Main
memory
Address
Range
OS visible
> 4 GB
Main
Memory
Reclaim
Add Range
Reclaim BASE
Reclaim Limit =
Reclaim Base + x
1 MB aligned
High PCI
Memory
Add. Range
(subtractively
decoded to
DMI)
1 MB aligned
512 GB
X
Flash, APIC
Intel
®
TXT
(20 MB)
TOLUD BASE