Figure 6-14. Audio Smi Tree Example - AMD Geode SC3200 Data Book

32581C
In Fast Path Write, the Core Logic module responds to
writes to the following addresses: 388h, 38Ah, 38Bh, 2x0h,
2x2h, and 2x8h.
SMI# Asserted
GX1
Module
Core Logic Module
F1BAR0+Memory
Offset 02h
Read to Clear
to determine
top-level source
of SMI
Bits [15:2]
Other_SMI
If bit 1 = 1,
Source of
SMI is
Audio Event
Bit 1
AUDIO_SMI
Bit 0
Other_SMI
Top Level
170
SMM software reads SMI Header
If Bit X = 1
(External SMI)
SMI De-asserted after all SMI Sources are Cleared
(i.e., Top, Second, and Third Levels)
F3BAR0+Memory
Offset 10h
Read to Clear
to determine
second-level
source of SMI
Bits [15:8]
RSVD
Bit 7
ABM5_SMI
Bit 6
ABM4_SMI
Bit 5
ABM3_SMI
Bit 4
ABM2_SMI
Bit 3
ABM1_SMI
Bit 2
ABM0_SMI
Bit 1
SER_INTR_SMI
Bit 0
I/O_TRAP_SMI
Second Level

Figure 6-14. Audio SMI Tree Example

Table 6-38 on page 262 shows the bit formats of the sec-
ond level SMI status reporting registers and the Fast Path
Read/Write programming bits.
If Bit X = 0
(Internal SMI)
Call internal SMI handler
to take appropriate action
F3BAR0+Memory
Offset 14h
Read to Clear
to determine
third-level
source of SMI
Take
Bits [31:14]
Appropriate
Other_RO
Action
Bit 13
SMI_SC/FM_TRAP
Bit 12
SMI_DMA_TRAP
If bit 0 = 1,
Source of
Bit 11
SMI is
SMI_MPU_TRAP
I/O Trap
Bit 10
SMI_SC/FM_TRAP
Bits [9:0]
Other_RO
Third Level
AMD Geode™ SC3200 Processor Data Book
Core Logic Module
Take
Appropriate
Action