Config_Data: Configuration Data Register; Error Handling Registers; Sac - Intel 460GX Software Developer’s Manual

15:11
1 0:8
7:2
1:0
2.3.2

CONFIG_DATA: Configuration Data Register

I/O Address:
Default Value:
Sticky:
CONFIG_DATA is a 32 bit read/write window into configuration space. The portion of
configuration space that is referenced by CONFIG_DATA is determined by the contents of
CONFIG_ADDRESS.
Bits
31:0
2.4

Error Handling Registers

2.4.1

SAC

2.4.1.1 SECTID: SEC ITID
Bus CBN, Device Number: 00h
Address Offset:
Default Value:
Sticky:
This register is used to capture the ITID for a single bit memory ECC error. The ITID can then be
used to determine the address of the failure. To force the ITID to be cleared and re-used, write a 1
to bit 6. This register is set anytime that the SEC bit is sent from the SDC to the SAC on a 'Retire
ITID' command.
Intel® 460GX Chipset Software Developer's Manual
subordinate bus number is in that range. For a type 1 cycle, the Bus Number is mapped
to AD[23:16] during the address phase.
Device Number.
This field selects one agent on the PCI bus selected by the Bus Number. Device 16 (10h)
on Bus #0 is always reserved for programming the CBN. On the bus that the chipset is
mapped into (determined by the CBN register), Device Numbers 0-31 are reserved for
the 460GX chipset components as shown in
forwarded to the selected bus.
Function Number.
This field is mapped to AD[10:8] during PCI configuration cycles. This allows the
configuration registers of a particular function in a multi-function device to be accessed.
Register Number.
This field selects one register within a particular Bus, Device, and Function as specified
by the other fields in the Configuration Address Register. This field is mapped to AD[7:2]
during PCI configuration cycles.
reserved (0)
CFCh
00000000h
No
Description
Configuration Data Window (CDW).
If bit 31 of CONFIG_ADDRESS is 1 any I/O reference that falls in the CONFIG_DATA
I/O space will be mapped to configuration space using the contents of
CONFIG_ADDRESS.
80h
00h
Yes
Register Descriptions
Table 2-1. All other devices numbers are
Size: 32 bits
Attribute: Read/Write
Locked: No
Function: 0
Size: 8 bits
Attribute: Read Only/Write
Clear, Read/Write
Locked: No
2-5