Intel i7-2600 CM8062300834302S ユーザーズマニュアル
製品コード
CM8062300834302S
Processor Configuration Registers
56
Datasheet, Volume 2
2.5.11
MCHBAR—Host Memory Mapped Register Range Base
Register
This is the base address for the Host Memory Mapped Configuration space. There is no
physical memory within this 32 KB window that can be addressed. The 32 KB reserved
by this register does not alias to any PCI 2.3 compliant memory mapped space. On
reset, the Host MMIO Memory Mapped Configuration space is disabled and must be
enabled by writing a 1 to MCHBAREN [Device 0, offset 48h, bit 0].
physical memory within this 32 KB window that can be addressed. The 32 KB reserved
by this register does not alias to any PCI 2.3 compliant memory mapped space. On
reset, the Host MMIO Memory Mapped Configuration space is disabled and must be
enabled by writing a 1 to MCHBAREN [Device 0, offset 48h, bit 0].
All the bits in this register are locked in Intel TXT mode.
The register space contains memory control, initialization, timing, and buffer strength
registers; clocking registers; and power and thermal management registers.
registers; clocking registers; and power and thermal management registers.
B/D/F/Type:
0/0/0/PCI
Address Offset:
48–4Fh
Reset Value:
0000_0000_0000_0000h
Access:
RW
Size:
64 bits
BIOS Optimal Default
00_0000_0000h
Bit
Attr
Reset
Value
RST/
PWR
Description
63:39
RO
0h
Reserved
38:15
RW
000000h
Uncore
Host Memory Mapped Base Address (MCHBAR)
This field corresponds to bits 38:15 of the base address Host
This field corresponds to bits 38:15 of the base address Host
Memory Mapped configuration space. BIOS will program this
register resulting in a base address for a 32 KB block of contiguous
memory address space. This register ensures that a naturally
aligned 32 KB space is allocated within the first 512 GB of
addressable memory space. System Software uses this base
address to program the Host Memory Mapped register set. All the
bits in this register are locked in Intel TXT mode.
14:1
RO
0h
Reserved
0
RW
0b
Uncore
MCHBAR Enable (MCHBAREN)
0 = Disabled. MCHBAR is disabled and does not claim any memory
0 = Disabled. MCHBAR is disabled and does not claim any memory
1 = Enabled. MCHBAR memory mapped accesses are claimed and
decoded appropriately
This register is locked by Intel TXT.