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Specification Sheet

ManualsBrandsINTEL ManualsPC ComponentsWOF processor Core i7 i7-7700K 4 x 4.2 GHz Q
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Datasheet, Volume 2 of 2 93
Host Bridge/DRAM Registers
3.34 Base Data of Stolen Memory (BDSM)—Offset B0h
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
BC bits 31:20).
Access Method
Default: 0h
6
3
6
0
5
6
5
2
4
8
4
4
4
0
3
6
3
2
2
8
2
4
2
0
1
6
1
2
8
4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
RSVD
TOUUD
RSVD
LOCK
Bit
Range
Default &
Access
Field Name (ID): Description
63:39
0h
RO
Reserved (RSVD): Reserved.
38:20
0h
RW_L
TOUUD: This register contains bits 38 to 20 of an address one byte above the
maximum DRAM memory above 4G that is usable by the operating system.
Configuration software should set this value to TOM minus all ME stolen memory if
reclaim is disabled. If reclaim is enabled, this value should be set to reclaim limit 1MB
aligned since reclaim limit + 1byte is 1MB aligned. Address bits 19:0 are assumed to
be 000_0000h for the purposes of address comparison. The Host interface positively
decodes an address towards DRAM if the incoming address is less than the value
programmed in this register and greater than 4GB.
All the bits in this register are locked in Intel TXT mode.
19:1
0h
RO
Reserved (RSVD): Reserved.
0
0h
RW_KL
LOCK: This bit will lock all writeable settings in this register, including itself.
Type: CFG
(Size: 32 bits)
Offset: [B:0, D:0, F:0] + B0h
3
1
2
8
2
4
2
0
1
6
1
2
8
4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
BDSM
RSVD
LOCK