sc3200 Advanced Micro Devices, sc3200 Datasheet - Page 259
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sc3200
Manufacturer Part Number
sc3200
Description
Geode-tm Sc3200 Processor
Manufacturer
Advanced Micro Devices
Datasheet
1.SC3200.pdf
(447 pages)
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Core Logic Module - SMI Status and ACPI Registers - Function 1
AMD Geode™ SC3200 Processor Data Book
Offset 22h-23h
The bits in this register contain second level of SMI status reporting. Top level is reported in F1BAR0+I/O Offset 00h/02h[2].
Reading this register clears the status at both the second and top levels.
A read-only “Mirror” version of this register exists at F1BAR0+I/O Offset 20h. If the value of the register must be read without clearing the
SMI source (and consequently de-asserting SMI), F1BAR0+I/O Offset 20h can be read instead.
Offset 24h-27h
Note:
31:24
15:6
Bit
23
22
5
4
3
2
1
0
EXT_SMI[7:0] are external SMIs, meaning external to the Core Logic module.
Bits [23:8] of this register contain second level of SMI status reporting. Top level status is reported in F1BAR0+I/O Offset 00h/
02h[10]. Reading bits [23:16] clears the second and top levels. If the value of the status bits must be read without clearing the
SMI source (and consequently de-asserting SMI), bits [15:8] can be read instead.
Description
Reserved. Always reads 0.
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.
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).
Reserved.
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).
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).
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.
Reserved. Must be set to 0.
EXT_SMI7 SMI Status. (Read to Clear) Indicates whether or not an SMI was caused by assertion of EXT_SMI7.
0: No.
1: Yes.
To enable SMI generation, set bit 7 to 1.
EXT_SMI6 SMI Status. (Read to Clear) Indicates whether or not an SMI was caused by an assertion of EXT_SMI6
0: No.
1: Yes.
To enable SMI generation, set bit 6 to 1.
Table 6-33. F1BAR0+I/O Offset: SMI Status Registers (Continued)
Second Level ACPI PME/SMI Status Register (RC)
External SMI Register (R/W)
Revision 5.1
Reset Value: 00000000h
Reset Value: 0000h
259
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