Bdsm-Base Data Of Stolen Memory Register; Bgsm-Base Of Gtt Stolen Memory Register - Intel 2ND GENERATION CORE PROCESSOR FAMILY DESKTOP - DATASHEET VOLUME 2 01-2011 Datasheet

Processor Configuration Registers
2.5.28 BDSM—Base Data of Stolen Memory Register
This register contains the base address of graphics data stolen DRAM memory. BIOS
determines the base of graphics data stolen memory by subtracting the graphics data
stolen memory size (PCI Device 0 offset 52 bits 7:4) from TOLUD (PCI Device 0, offset
BCh, bits 31:20).
B/D/F/Type:
Address Offset:
Reset Value:
Access:
Size:
BIOS Optimal Default
Bit
31:20
19:1
0
2.5.29 BGSM—Base of GTT stolen Memory Register
This register contains the base address of stolen DRAM memory for the GTT. BIOS
determines the base of GTT stolen memory by subtracting the GTT graphics stolen
memory size (PCI Device 0, offset 52h, bits 9:8) from the Graphics Base of Data Stolen
Memory (PCI Device 0, offset B0h, bits 31:20).
B/D/F/Type:
Address Offset:
Reset Value:
Access:
Size:
BIOS Optimal Default
Bit
31:20
19:1
0
Datasheet, Volume 2
0/0/0/PCI
B0–B3h
00000000h
RW-KL, RW-L
32 bits
00000h
Reset RST/
Attr
Value PWR
RW-L 000h Uncore
RO 0h
RW-KL 0b Uncore
0/0/0/PCI
B4–B7h
00100000h
RW-KL, RW-L
32 bits
00000h
Reset RST/
Attr
Value PWR
RW-L 001h Uncore
RO 0h
RW-KL 0b Uncore
Description
Graphics Base of Stolen Memory (BDSM)
This register contains bits 31:20 of the base address of stolen
DRAM memory. BIOS determines the base of graphics stolen
memory by subtracting the graphics stolen memory size (PCI
Device 0, offset 52h, bits 6:4) from TOLUD (PCI Device 0, offset
BCh, bits 31:20).
Reserved
Lock (LOCK)
This bit will lock all writeable settings in this register, including
itself.
Description
Graphics Base of GTT Stolen Memory (BGSM)
This register contains the base address of stolen DRAM memory for
the GTT. BIOS determines the base of GTT stolen memory by
subtracting the GTT graphics stolen memory size (PCI Device 0,
offset 52h, bits 11:8) from the Graphics Base of Data Stolen
Memory (PCI Device 0, offset B0h, bits 31:20).
Reserved
Lock (LOCK)
This bit will lock all writeable settings in this register, including
itself.
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