82NM10 Datasheet, PDF (123/671 Pages) Intel Corporation – Intel® NM10 Family Express Chipset

Functional Description
source from Chipset power management logic cause the I/O APIC to send an SMI
message (there is no way to do this). chipset’s I/O APIC can only send interrupts due to
interrupts which do not include SMI, NMI or INIT. This means that in IA32/IA64 based
platforms, Front Side Bus interrupt message format delivery modes 010
(SMI/PMI), 100 (NMI), and 101 (INIT) as indicated in this section, must not be used
and is not supported. Only the hardware pin connection is supported by Chipset.
:
Table 5-45.Interrupt Message Address Format
Bit
Description
31:20
19:12
11:4
3
2
1:0
Will always be FEEh
Destination ID: This is the same as bits 63:56 of the I/O Redirection Table entry for
the interrupt associated with this message.
Extended Destination ID: This is the same as bits 55:48 of the I/O Redirection
Table entry for the interrupt associated with this message.
Redirection Hint: This bit is used by the processor host bridge to allow the interrupt
message to be redirected.
0 = The message will be delivered to the agent (processor) listed in bits 19:12.
1 = The message will be delivered to an agent with a lower interrupt priority This can
be derived from bits 10:8 in the Data Field (see below).
The Redirection Hint bit will be a 1 if bits 10:8 in the delivery mode field associated
with corresponding interrupt are encoded as 001 (Lowest Priority). Otherwise, the
Redirection Hint bit will be 0
Destination Mode: This bit is used only the Redirection Hint bit is set to 1. If the
Redirection Hint bit and the Destination Mode bit are both set to 1, then the logical
destination mode is used, and the redirection is limited only to those processors that
are part of the logical group as based on the logical ID.
Will always be 00.
Table 5-46.Interrupt Message Data Format
Bit
Description
31:16
15
14
13:12
11
10:8
7:0
Will always be 0000h.
Trigger Mode: 1 = Level, 0 = Edge. Same as the corresponding bit in the I/O
Redirection Table for that interrupt.
Delivery Status: 1 = Assert, 0 = Deassert. Only Assert messages are sent. This bit
is always 1.
Will always be 00
Destination Mode: 1 = Logical. 0 = Physical. Same as the corresponding bit in the
I/O Redirection Table for that interrupt.
Delivery Mode: This is the same as the corresponding bits in the I/O Redirection
Table for that interrupt.
000 = Fixed 100 = NMI
001 = Lowest Priority 101 = INIT
010 = SMI/PMI 110 = Reserved
011 = Reserved 111 = ExtINT
Vector: This is the same as the corresponding bits in the I/O Redirection Table for
that interrupt.
Datasheet
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