cs5535 National Semiconductor Corporation, cs5535 Datasheet - Page 70

• Manufacturer Part Number: cs5535
• Description: Geode Cs5535 Companion Multi-function South Bridge
• Manufacturer: National Semiconductor Corporation

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Global Concepts and Features
SSMIs are primarily used for hardware emulation and
extension. From the perspective of the code on which the
trap occurred, everything is normal and done in hardware.
However, VSA code generally performs a number of opera-
tions to achieve the desired result. This can include return-
ing an appropriate read value to the trapped software. The
GLIU is often used to implement SSMI traps. Any I/O
Note 1.
Port 0, GLIU (Note 1)
Port 1, GLPCI_SB
Port 4, DD (DIVIL)
Port #, Device
Port 2, USBC2
Port 6, USBC1
Port 7, GLCP
Port 3, ATAC
Port 5, ACC
(Note 1)
For this device, the listed events are enabled when the EN bit is low. For all other devices, events are enabled when the associ-
ated EN bit is high.
FLAG Bit
34
33
32
22
21
20
19
18
17
16
33
32
33
46
45
44
43
41
40
39
38
37
36
35
34
33
32
32
33
32
17
16
35
47
1
Table 3-9. GLD_MSR_SMIs Summary
EN Bit
15
14
13
12
11
3
2
1
0
6
5
4
3
2
1
0
1
0
1
0
9
8
7
6
5
4
3
2
1
0
0
1
0
1
0
(Continued)
SMI Type
ASMI
ASMI
ASMI
SSMI
ASMI
ASMI
ASMI
ASMI
ASMI
ASMI
ASMI
ASMI
ASMI
ASMI
SSMI
SSMI
SSMI
ASMI
SSMI
SSMI
SSMI
SSMI
ASMI
ASMI
ASMI
ASMI
ASMI
ASMI
ASMI
ASMI
SSMI
ASMI
ASMI
ASMI
ASMI
70
descriptor can be used for this purpose by setting the Des-
tination ID to 0. On a descriptor hit, the GLIU traps the
access and sets the SSMI bit in the response packet.
3.8.3.3
Table 3-9 provides a register summary for the Standard
GLD_SMI_MSRs.
Description
Statistics Counter 2 Event
Statistics Counter 1 Event
Statistics Counter 0 Event
Descriptor Trap and Illegal Accesses
Target Abort Signaled
Parity Error
System Error
EXECP Received
SSMI Received
Target Abort Received
Master Abort Received
INT by the USB (see PIC for actual source)
ASMI for the USB (see USB for actual source)
IRQ for IDE (see PIC for actual source)
IDE PIO
PMC PM1_CNT
PMC PM2_CNT
KEL A20 Keyboard
8237 DMA Controller access during legacy DMA
LPC access during legacy DMA
UART 2 access during legacy DMA
UART 1 access during legacy DMA
KEL INIT Port A
KEL A20 Port A
KEL INIT Keyboard
PMC Event (see PMC for actual source)
Extended PIC Mapper (see PIC for actual source)
KEL Emulation Event
Shutdown Special Cycle
Halt Special Cycle
IRQ from ACC
INT by the USB (see PIC for actual source)
ASMI for the USB (see USB for actual source)
Debug event
Convert CS5535 Global GLIU_Error to ASMI
ASMI/SSMI Summary
Revision 0.8