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Local Interrupt Assignment Entries; Local Interrupt Entry - Intel MultiProcessor Specification

Intel multiprocessor specification
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Table 4-11. Interrupt Type Values
Interrupt Type*
0
1
2
3
* All other values are reserved.

4.3.5 Local Interrupt Assignment Entries

These configuration table entries tell what interrupt source is connected to each local interrupt
input of each local APIC. Figure 4-8 shows the format of each entry, and Table 4-12 explains each
field.
31
31
Version 1.4
Description
Comments
INT
Signal is a vectored interrupt; vector is supplied by APIC
redirection table.
NMI
Signal is a nonmaskable interrupt.
SMI
Signal is a system management interrupt.
ExtINT
Signal is a vectored interrupt; vector is supplied by external PIC.
For example, if an 8259 is used as the external PIC, the source is
the 8259 INTR output line, and the vector is supplied by the 8259.
24
23
16
DESTINATION
DESTINATION
LOCAL APIC
LOCAL APIC ID
LINTIN#
LOCAL INTERRUPT FLAG
E
P
RESERVED
L
O
24
23
16
Figure 4-8. Local Interrupt Entry
15
8
7
SOURCE BUS
SOURCE
IRQ
BUS ID
INTERRUPT
ENTRY TYPE
TYPE
4
15
8
7
MP Configuration Table
0
04H
00H
0
4-15

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