AMD Geode SC1201 User Manual
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AMD Geode™ SC1200/SC1201 Processor Data Book
Core Logic Module - SMI Status and ACPI Registers - Function 1
32579B
Offset 08h-09h
SMI Speedup Disable Register (Read to Enable)
Reset Value: 0000h
15:0
SMI Speedup Disable. If bit 1 in the Suspend Configuration Register is set (F0 Index 96h[1] = 1), a read of this register
invokes the SMI handler to re-enable Suspend Modulation.
The data read from this register can be ignored. If the Suspend Modulation feature is disabled, reading this I/O location has
no effect.
Offset 0Ah-1Bh
Reserved
Reset Value: 00h
These addresses should not be written.
Offset 1Ch-1Fh
ACPI Timer Register (RO)
Reset Value: xxxxxxxxh
Note:
This register can also be read at F1BAR1+I/O Offset 1Ch.
31:24
Reserved.
23:0
TMR_VAL. This field returns the running count of the power management timer.
Offset 20h-21h
Second Level ACPI PME/SMI
Reset Value: 0000h
Status Mirror Register (RO)
The bits in this register contain second level SMI status reporting. Top level status is reported in F1BAR0+I/O Offset 00h/02h[2].
Reading this register does not clear the SMI. For more information, see F1BAR0+I/O Offset 22h.
15:6
Reserved. Always reads 0.
5
ACPI BIOS SMI Status. Indicates whether or not an SMI was caused by ACPI software raising an event to BIOS software.
0: No.
1: Yes.
To enable SMI generation, set F1BAR1+I/O Offset 0Ch[2] to 1, and F1BAR1+I/O Offset 0Fh[0] to 1.
4
PLVL3 SMI Status. Indicates whether or not an SMI was caused by a read of the ACPI PLVL3 register (F1BAR1+I/O Offset
05h).
0: No.
1: Yes.
To enable SMI generation, set F1BAR1+I/O Offset 18h[11] to 1 (default).
3
Reserved.
2
SLP_EN SMI Status. Indicates whether or not an SMI was caused by a write of 1 to the ACPI SLP_EN bit (F1BAR1+I/O
Offset 0Ch[13]).
0: No.
1: Yes.
To enable SMI generation, set F1BAR1+I/O Offset 18h[9] to 1 (default).
1
THT_EN SMI Status. Indicates whether or not an SMI was caused by a write of 1 to the ACPI THT_EN bit (F1BAR1+I/O
Offset 00h[4]).
0: No.
1: Yes.
To enable SMI generation, set F1BAR1+I/O Offset 18h[8] to 1 (default).
0
SMI_CMD SMI Status. Indicates whether or not an SMI was caused by a write to the ACPI SMI_CMD register (F1BAR1+I/
O Offset 06h).
0: No.
1: Yes.
A write to the ACPI SMI_CMD register always generates an SMI.
Table 6-33. F1BAR0+I/O Offset: SMI Status Registers (Continued)
Bit
Description