Interrupt Information (INTR) – Offset 3C - 1.3 - ID:767626 | 12th Generation Intel® Core™ Processor Datasheet Volume 2 of 2

Introduction
Processor Configuration Register Definitions and Address Ranges
D0:F0 Host Bridge and DRAM Controller - DMIBAR Registers
D0:F0 Host Bridge and DRAM Controller - GFXVTBAR Registers
D0:F0 Host Bridge and DRAM Controller - GTTMMADR Registers (part 1)
D0:F0 Host Bridge and DRAM Controller - GTTMMADR Registers (part 2)
D0:F0 Host Bridge and DRAM Controller - Host Bridge/DRAM Registers (part 1)
- Revision ID (RID_0_0_0_PCI)
D0:F0 Host Bridge and DRAM Controller - Host Bridge/DRAM Registers (part 2)
D0:F0 Host Bridge and DRAM Controller - MCHBAR Host Controller Registers (part 1)
- GFX VT Range Base Address Register (GFXVTBAR_0_0_0_MCHBAR_NCU)
- VT DMI PEG VC0 Range Base Address Register (VTDPVC0BAR_0_0_0_MCHBAR_NCU)
D0:F0 Host Bridge and DRAM Controller - MCHBAR Host Controller Registers (part 2)
D0:F0 Host Bridge and DRAM Controller - MCHBAR Memory Controller Registers (part 2)
D0:F0 Host Bridge and DRAM Controller - MCHBAR Memory Controller Registers (part 3)
D0:F0 Host Bridge and DRAM Controller - MCHBAR Memory Controller Registers (part 4)
D0:F0 Host Bridge and DRAM Controller - MCHBAR Memory Controller Registers (part 5)
D0:F0 Host Bridge and DRAM Controller - MCHBAR Power Management Registers (part 1)
D0:F0 Host Bridge and DRAM Controller - MCHBAR Power Management Registers (part 2)
D0:F0 Host Bridge and DRAM Controller - PXPEPBAR PCI Express Egress Port Registers
D0:F0 Host Bridge and DRAM Controller - VTDPVC0BAR Registers
D1:F0-1 PCI Express* Controller Registers
D10:F0 Platform Monitoring Technology (PMT) Registers
D14:F0 Volume Management Device
D14:F0 Volume Management Device MEMBAR2 Registers
D2:F0 Processor Graphics
D4:F0 Dynamic Tuning Technology Registers
D6:F0 PCI Express* Controller Registers
D8:F0 Gauss Newton Algorithm Registers

Interrupt Information (INTR) – Offset 3C

Interrupt Information

Bit Range	Default	Access	Field Name and Description
15:8	0x1	RO/V	Interrupt Pin (IPIN) Indicates the interrupt pin driven by the root port. At reset, this register takes on the following values, which reflect the reset state of the STRPFUSECFG.PxIP field: Port Bits[15:12] Bits[11:08] 1 0h STRPFUSECFG.P1IP 2 0h STRPFUSECFG.P2IP 3 0h STRPFUSECFG.P3IP : : X 0h STRPFUSECFG.PxIP The value that is programmed into STRPFUSECFG.PxIP is always reflected in this register. For PCI Bus Emulation Mode compatibility, if the PCIBEM register is set, this register returns a value of 00h when read, else this register returns the value from the table above. Note: Depending on the platform, the number of Root Ports supported may vary. In this case, the encodings defined in this register will be scaled accordingly.
7:0	0x0	RW	Interrupt Line (ILINE) Software written value to indicate which interrupt line (vector) the interrupt is connected to. No hardware action is taken on this register.

Bit Range

Default

Access

Field Name and Description

15:8

0x1

RO/V

Interrupt Pin (IPIN)

Indicates the interrupt pin driven by the root port. At reset, this register takes on the following values, which reflect the reset state of the STRPFUSECFG.PxIP field:
Port Bits[15:12] Bits[11:08]
1 0h STRPFUSECFG.P1IP
2 0h STRPFUSECFG.P2IP
3 0h STRPFUSECFG.P3IP
:
:
X 0h STRPFUSECFG.PxIP
The value that is programmed into STRPFUSECFG.PxIP is always reflected in this register.
For PCI Bus Emulation Mode compatibility, if the PCIBEM register is set, this register returns a value of 00h when read, else this register returns the value from the table above.
Note: Depending on the platform, the number of Root Ports supported may vary. In this case, the encodings defined in this register will be scaled accordingly.

7:0

0x0

Interrupt Line (ILINE)

Software written value to indicate which interrupt line (vector) the interrupt is connected to. No hardware action is taken on this register.

Bridge Control (BCTRL)

Capabilities List Pointer (CAPP) Bridge Control (BCTRL)