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©2008 Advanced Micro Devices, Inc.
SMBus Module and ACPI Block (Device 20, Function 0)
AMD SB600 Register Reference Manual Proprietary Page 136
Pci_Intr_Data - RW – 8 bits - [IO_Reg: C01h]
Field Name Bits Default Description
Pci_Intr_Data 7:0 00h PCI redirection register; map PCI interrupt addressed by
Pci_Intr_Index to a PIC IRQ
[7:4] – Not used
Straight encoding of [3:0] to : IRQ0 thru IRQ15
Note: Do not map to IRQ 0, 2, 8, 13 – they are reserved
Pci_Intr_Data register
Note: If IOXAPIC is enabled, software must make sure interrupts are not re-routed; i.e., they should all be set to 0.
When IOXAPIC is enabled, IRQ[15:0] are routed directly to INT[15:0]. INTH#, INTG#, INTF#, INTE#, INTD#, INTC#,
INTB#, and INTA# are routed to INTIN[23:16], SMBus interrupt is routed to INTIN[20], SCI# is routed to INTIN[9],
and the High Precision Event Timer (also called the Multimedia Timer) can be routed to either INTIN[22] or
INTIN[23].
Pci_Error - RW – 8 bits - [IO_Reg: C14h]
Field Name Bits Default Description
Serr_Nmi_Status 0 - Set to 1 when NMI generation is enabled and SERR# has
been asserted due to a PCI error. Cleared by writing a one to
port 61h, bit 2. [Read-only]
Perr_Nmi_Status 1 - Set to 1 when NMI generation is enabled and PERR# has
been asserted due to a PCI data parity error. Cleared by
writing a one to port 61h, bit 2. [Read-only]
Serr_Nmi 2 1b Enable NMI generation from SERR#
0 – Enable
1 – Disable
Perr_Nmi 3 1b Enable NMI generation from PERR#
0 – Enable
1 – Disable
Reserved 7:4 0h
Pci_Error register
CMIndex - RW – 8 bits - [IO_Reg: C50h]
Field Name Bits Default Description
CMIndex 7:0 00h Index register to client management register block
00h – IdRegister
02h – TempStatus
03h – TempInterrupt
12h – SmBus control (control to Gpoc[3:0] pins
thru Bit Bang)
13h - Misccontrol
others – super IO – not used
CMIndex register
CMData - RW – 8 bits - [IO_Reg: C51h]
Field Name Bits Default Description
CMData 7:0 00h Data register to client management register block
CMData register
GpmPort - RW – 8 bits - [IO_Reg: C52h]
Field Name Bits Default Description
Gpm 7:0 -- If CMIndex.13h[7:6] == 00, then this is the read port for
GPM[7:0].
If CMIndex.13h[7:6]= 01, then this is the output enable for
GPM[7:0], 0=enable, 1=tristate
If CMIndex.13h[7:6]=10, then this is the output state control
(providing enable is turned on)