Datasheet

Intel
®
Xeon
®
Processor C5500/C3500 Series
February 2010 Datasheet, Volume 1
Order Number: 323103-001 343
Interrupts
3
Redirection Hint: This bit allows the interrupt message to be directed to
one among many targets, based on chipset redirection algorithm.
0 = The message will be delivered to the agent (CPU) listed in bits 19:4
1 = The message will be delivered to an agent based on the IIO redirection
algorithm and the scope the interrupt as specified in the interrupt address.
The Redirection Hint bit will be a 1 if bits 10:8 in the Delivery Mode field
associated with corresponding interrupt are encoded as 001 (Lowest
Priority). Otherwise, the Redirection Hint bit will be 0.
2
Destination Mode: This is the corresponding bit from the I/O Redirection
Table entry. 1=logical mode and 0=physical mode. This bit determines if
IntLogical or IntPhysical is used on QPI.
1:0 00
Table 109. MSI Address Format when Remapping Disabled (Sheet 2 of 2)
Bits Description
Table 110. MSI Data Format when Remapping Disabled
Bits Description
31:16 0000h
15
Trigger Mode: 1 = Level, 0 = Edge. Same as the corresponding bit in the
I/O Redirection Table for that interrupt.
14 Delivery Status: Always set to 1 i.e. asserted
13:12 00
11
Destination Mode: This is the corresponding bit from the I/O Redirection
Table entry. 1=logical mode and 0=physical mode.
Note that this bit is set to 0 before being forwarded to QPI.
10:8
Delivery Mode: This is the same as the corresponding bits in the I/O
Redirection Table for that interrupt.
7:0
Vector: This is the same as the corresponding bits in the I/O Redirection
Table for that interrupt.
Table 111. MSI Address Format when Remapping is Enabled
Bits Description
31:20 FEEh
19:4
Interrupt Handle: IIO looks up an interrupt remapping table in main
memory using this field as an offset into the table
3
Sub Handle Valid: When IIO looks up the interrupt remapping table in
main memory, and if this bit is set, IIO adds the bits 15:0 from interrupt
data field to interrupt handle value (bit 19:4 above) to obtain the final offset
into the remapping table. If this bit is clear, Interrupt Handle field directly
becomes the offset into the remapping table.
2 Reserved: IIO hardware ignores this bit
1:0 00