Case 1: Less Than 4 Gb Of Physical Memory (No Remap) - Intel 2ND GENERATION CORE PROCESSOR FAMILY DESKTOP - DATASHEET VOLUME 2 01-2011 Datasheet

Processor Configuration Registers

Case 1: Less than 4 GB of Physical Memory (no remap)

Figure 2-5. Case 1: Less than 4 GB of Physical Memory (no remap)
TOUUD BASE
1 MB aligned
TOLUD BASE
1 MB aligned
• Populated Physical Memory = 2 GB
• Address Space allocated to memory mapped IO = 1 GB
• Remapped Physical Memory = 0 GB
• TOM – 00_7FF0_0000h (2 GB)
• ME base – 00_7FF0_0000h (1 MB)
• ME Mask – 00_7FF0_0000h
• TOUUD – 00_0000_0000h (Disable - Avoid access above 4 GB)
• TOLUD – 00_7FE0_0000h (2 GB minus 1 MB)
• REMAPBASE – 7F_FFFF_0000h (default)
• REMAPLIMIT – 00_0000_0000h (0 GB boundary, default)
Datasheet, Volume 2
HOST/SYSTEM VIEW
PCI MMIO
TSEG
"LOW
DRAM"
0
PHYSICAL MEMORY
(DRAM CONTROLLER VIEW)
4 GB
TOM
ME-UMA
ME BASE
Wasted
(Only if 4 GB
minus PCI
MMIO space is
greater than
4 GB minus ME
stolen base)
GFX Stolen
GFX Stolen BASE
GFX GTT
STOLEN
GFX GTT Stolen BASE
TSEG BASE
OS VISIBLE
0
1 MB aligned
1 MB aligned
1 MB aligned
1 MB aligned
1 MB aligned
TSEG
1 MB aligned
< 4 GB
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