Functional Description
120 Datasheet
5.2.2.4 SMI/SCI Generation
Interrupts for power management events are not supported on legacy operating
systems. To support power management on non-PCI Express aware operating systems,
PM events can be routed to generate SCI. To generate SCI, MPC.PMCE must be set.
When set, a power management event will cause SMSCS.PMCS (D28:F0/F1/F2/F3/F4/
F5/F6/F7:Offset DCh:Bit 31) to be set.
Additionally, BIOS workarounds for power management can be supported by setting
MPC.PMME (D28:F0/F1/F2/F3/F4/F5/F6/F7:Offset D8h:Bit 0). When this bit is set,
power management events will set SMSCS.PMMS (D28:F0/F1/F2/F3/F4/F5/F6/
F7:Offset DCh:Bit 0), and SMI # will be generated. This bit will be set regardless of
whether interrupts or SCI is enabled. The SMI# may occur concurrently with an
interrupt or SCI.
5.2.3 SERR# Generation
SERR# may be generated using two paths – through PCI mechanisms involving bits in
the PCI header, or through PCI Express
*
mechanisms involving bits in the PCI Express
capability structure.
5.2.4 Hot-Plug
Each root port implements a Hot-Plug controller that performs the following:
• Messages to turn on/off/blink LEDs
• Presence and attention button detection
• Interrupt generation
The root port only allows Hot-Plug with modules (such as, ExpressCard*). Edge-
connector based Hot-Plug is not supported.
Figure 5-1. Generation of SERR# to Platform
PSTS.SSE
SERR#
PCICMD.SEE
Secondary Parity Error
Primary Parity Error
Secondary SERR#
Correctable SERR#
Fatal SERR#
Non-Fatal SERR#
PCI
PCI Express
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