EP80579 Datasheet, PDF (1078/1916 Pages) Intel Corporation – Intel® EP80579 Integrated Processor Product Line

Intel^® EP80579 Integrated Processor
Table 27-26. Causes of SMI# (Sheet 2 of 2)
Cause
Additional Enables
Where Reported
Synch
Access to Microcontroller Range
(62h/66h)
MCSMI_EN
MCSMI_STS
X
SLP_EN bit written to 1
SMI_ON_SLP_EN = 1
SMI_ON_SLP_EN_STS
X
Notes: Causes of SMI#:
1.
GBL_SMI_EN must be 1 to enable SMI
2.
EOS must be written to 1 to reenable SMI for the next one
3.
Some SMI#s are considered “synchronous”, in that the processor must recognize the SMI# prior to
completing the instruction (I/O read, I/O write, Memory read, or Memory write) that must cause the
SMI#. This is accomplished by having the SMI# signal go active to the processor prior to the
processor observing the RDY# signal that terminates the cycle. SMI#s marked with X in the Synch
column are treated as Synchronous.
4.
NMI2SMI_STS isn’t gated by TCO_EN.
5.
An SMI# must be fully enabled when CMI is also enabled to trap cycles. If SMI# is not enabled in
conjunction with the trap enabling, then hardware behavior is undefined. [Note: added as per SUN#
47], part 3.
Table 27-27. Causes of TCO SMI#
Cause
Additional Enables
Year 2000 Rollover
None
TCO TIMEROUT
None
OS writes to TCO_DAT_IN register
None
NMI occurred (and NMIs mapped to SMI) NMI2SMI_EN = 1
Note: NMI2SMI_STS isn’t gated by TCO_EN.
INTRUDER# signal goes active
INTRD_SEL = 10
Changes of the BIOSWP bit from 0 to 1 BLD = 1
Message from IMCH
Write attempted to BIOS
BIOSWP = 1
Where Reported
NEWCENTURY_STS
TIMEOUT
OS_TCO_SMI
NMI2SMI_STS
INTRD_DET
BIOSWR_STS
IMCHSMI_STS
BIOSWR_STS
See Chapter 32.0, “High Precision Event Timers” for details on the TCO SMI# causes.
27.4.0.1
PCI Express* SCI
PCI Express* ports and the IMCH (via NSI) have the ability to cause PME using
messages. When a PME message is received, the PCI_EXP_STS bit is set. If
the PCI_EXP_EN bit is also set, CMI can cause an SCI via the GPE1_STS
register.
Intel^® EP80579 Integrated Processor Product Line Datasheet
1078
August 2009
Order Number: 320066-003US