Datasheet

Processor Configuration Registers
166 Datasheet, Volume 2
2.10.28 SS—Subsystem ID and Subsystem Vendor ID Register
System BIOS can be used as the mechanism for loading the SSID/SVID values. These
values must be preserved through power management transitions and a hardware
reset.
2.10.29 MSI_CAPID—Message Signaled Interrupts Capability ID
Register
When a device supports MSI it can generate an interrupt request to the processor by
writing a predefined data item (a message) to a predefined memory address.
The reporting of the existence of this capability can be disabled by setting MSICH
(CAPL[0] @ 7Fh). In that case walking this linked list will skip this capability and
instead go directly from the PCI PM capability to the PCI Express capability.
B/D/F/Type: 0/6/0/PCI
Address Offset: 8C–8Fh
Reset Value: 0000_8086h
Access: RW-O
Size: 32 bits
Bit Attr
Reset
Value
RST/
PWR
Description
31:16 RW-O 0000h Uncore
Subsystem ID (SSID)
Identifies the particular subsystem and is assigned by the vendor.
15:0 RW-O 8086h Uncore
Subsystem Vendor ID (SSVID)
Identifies the manufacturer of the subsystem and is the same as
the vendor ID which is assigned by the PCI Special Interest Group.
B/D/F/Type: 0/6/0/PCI
Address Offset: 90–91h
Reset Value: A005h
Access: RO
Size: 16 bits
Bit Attr
Reset
Value
RST/
PWR
Description
15:8 RO A0h Uncore
Pointer to Next Capability (PNC)
This field contains a pointer to the next item in the capabilities list
that is the PCI Express capability.
7:0 RO 05h Uncore
Capability ID (CID)
The value of 05h identifies this linked list item (capability
structure) as being for MSI registers.