Deven-Device Enable Register - Intel 2ND GENERATION CORE PROCESSOR FAMILY DESKTOP - DATASHEET VOLUME 2 01-2011 Datasheet

Processor Configuration Registers
2.5.13 DEVEN—Device Enable Register
This register allows for enabling/disabling of PCI devices and functions that are within
the processor package. In the following table the bit definitions describe the behavior of
all combinations of transactions to devices controlled by this register.
All the bits in this register are Intel TXT Lockable.
B/D/F/Type:
Address Offset:
Reset Value:
Access:
Size:
BIOS Optimal Default
Bit
31:15
14
13
12:8
7
6:5
4
3
2
1
0
Datasheet, Volume 2
0/0/0/PCI
54–57h
0000209Fh
RW-L, RO, RW
32 bits
000000h
Reset RST/
Attr
Value PWR
RO 0h
RO 0h
RW-L 1b Uncore
RO 0h
RO 0h
RO 0h
RW-L 1b Uncore
RW-L 1b Uncore
RW-L 1b Uncore
RW-L 1b Uncore
RO 1b Uncore
Description
Reserved
Reserved
PEG60 Enable (D6F0EN)
0 = Disabled. Bus 0 Device 6 Function 0 is disabled and hidden.
1 = Enabled. Bus 0 Device 6 Function 0 is enabled and visible.
This bit will be set to 0b and remain 0b if PEG60 capability is
disabled.
Reserved
Reserved
Reserved
Internal Graphics Engine (D2EN)
0 = Disabled. Bus 0 Device 2 is disabled and hidden
1 = Enabled. Bus 0 Device 2 is enabled and visible
This bit will be set to 0b and remain 0b if Device 2 capability is
disabled.
PEG10 Enable (D1F0EN)
0 = Disabled. Bus 0 Device 1 Function 0 is disabled and hidden.
1 = Enabled. Bus 0 Device 1 Function 0 is enabled and visible.
This bit will be set to 0b and remain 0b if PEG10 capability is
disabled.
PEG11 Enable (D1F1EN)
0 = Disabled. Bus 0 Device 1 Function 1 is disabled and hidden.
1 = Enabled. Bus 0 Device 1 Function 1 is enabled and visible.
This bit will be set to 0b and remain 0b if:
• PEG11 is disabled by strap (PEG0CFGSEL)
PEG12 Enable (D1F2EN)
0 = Disabled. Bus 0 Device 1 Function 2 is disabled and hidden.
1 = Enabled. Bus 0 Device 1 Function 2 is enabled and visible.
This bit will be set to 0b and remain 0b if:
• PEG12 is disabled by strap (PEG0CFGSEL)
Host Bridge (D0EN)
Bus 0 Device 0 Function 0 may not be disabled and is therefore
hardwired to 1.
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