Smi#/Sci Generation; Table 8-3: Causes Of Smi# And Sci - AMD SP5100 Data Book

44409 Rev. 1.70 October 10
Power State Functional Characteristics
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D3hot
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D3cold
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8.2

SMI#/SCI Generation

Certain system events are routable between SMI# and SCI. When an event is routed to SMI#, an SMI#
assertion message will be sent by the SP5100 to the processor and it will enter SMM space. The SMI
status remains active until the EOS bit is set. When the EOS is set, SMI# de-assertion message will be
sent to the processor for at least 4 PCICLK cycles. If the event is routed to SCI, then BIOS can route it to
any of the legacy interrupts (except IRQ8) or INT21 in the case of IOAPIC.

Table 8-3: Causes of SMI# and SCI

Cause
SMI Command port
SERR# port
GBLRLS written to
PM Timer1
PM x00, bit 4 is written 1
IRQ[15:8] activity
IRQ[7:0] activity
Legacy IO activity
IO activity
Temperature Warning
Temperature Warning
(this input can generate
SMI# through this set of
register)
GEVENT/GPM inputs
USB SMI#
SMBus SMI#
HDAudio wake
USB wake
RTC
ACPI timer
GBL_STS
PowerButton
EHCI shall preserve PCI
configuration
EHCI shall preserve USB
configuration
Hardware masks functional
interrupts
All ports are disabled or suspended
PME Context in PCI Configuration
space is preserved
Wake Context in EHCI Memory
Space is preserved
All ports are disabled or suspended
SCI SMI Additional Enable
Yes Yes PM x0E, bit 2
Yes Yes PCI config x64, bit 16
Yes Yes PM x0E, bit 0
Yes Yes PM x00, bit 1;
PM x08, x09, x0A
Yes Yes PM x00, bit 4
Yes Yes PM x02
Yes Yes PM x03
Yes Yes PM x04
Yes Yes PM x1C, PM xA8
Yes Yes XC50/C51, index x03, bit 1
Yes Yes AcpiGpe0Blk, index 00, bit 9
Yes Yes AcpiGpe0Blk, index 00, bits
[7:0] for GEVENT, bits [29, 28,
26, 25, 22:19] for GPM
Yes Yes AcpiGpe0Blk, index 00, bit 8
Yes Yes AcpiGpe0Blk, index 00, bit 8
Yes Yes AcpiGpe0Blk, index 00, bit 27
Yes Yes AcpiGpe0Blk, index 00, bit 11
Yes Yes RTC_STS
Yes Yes TMR_STS
Yes Yes GBL_STS
Yes Yes PWRBTN_STS
Functional Description
AMD SP5100 Databook
Wake-up Characteristics (Associated Enables
must be Set)
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Resume detected on suspended port
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Connect or Disconnect detected on port
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Over Current detected on port
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Resume detected on suspended port
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Connect or Disconnect detected on port
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Over Current detected on port
Where reported
PM x0F, bit 2
PCI config x04, bit 30;
PM x0F, bit 1
PM x0F ,bit 0
PM x01, bit 1
PM x01, bit 4
PM x05
PM x06
PM x07
PM x1D, PM xA9
XC50/C51, index x02, bit 1
AcpiGpe0Blk, index 04, bit 9
AcpiGpe0Blk, index 04, same
bits
AcpiGpe0Blk, index 04, bit 8;
PM x0F, bit 5
AcpiGpe0Blk, index 04, bit 8;
PM x0F, bit 4
–
AcpiGpe0Blk, index 04, bit 11
RTC_EN
TMR_EN
GBL_EN
PWRBTN_EN
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