CS5530A datasheet(83/259 Pages) AMD

83 / 259 page

AMD Geode™ CS5530A Companion Device Data Book

Power Management

Revision 1.1

Figure 4-7. General Purpose Timer and UDEF Trap SMI Tree Example

SMI# Asserted

SMM software reads SMI Header

If Bit X = 0

(Internal SMI)

If Bit X = 1

(External SMI)

Call internal SMI handler

to take appropriate action

AMD Geode™

F1BAR+Memory

Read to Clear

to determine

top-level source

of SMI

F1BAR+Memory

Offset 06h

Read to Clear

Bits [15:10]

Bits [8:0]

Bit 9

GTMR_TRP_SMI

Offset 02h

AMD Geode™

to determine

second-level

source of SMI

Bit 5

PCI_TRP_SMI

Bit 4

UDEF3_TRP_SMI

Bit 3

UDEF2_TRP_SMI

Bit 2

UDEF1_TRP_SMI

Bit 1

GPT2_SMI

Bit 0

GPT1_SMI

Take

Appropriate

Action

Other_SMI

If bit 9 = 1,

Source of SMI

is GP Timer or UDEF Trap

Bits 15:6

RSVD

Top Level

Second Level

SMI Deasserted after all SMI Sources are Cleared

(i.e., Top and Second Levels - note some sources may have a Third Level)

GX1

Processor

CS5530A

Companion

CS5530A Datasheet(PDF) 83 Page - Advanced Micro Devices

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