Datasheet

System Address Map
4-16 Intel
®
E8870 Scalable Node Controller (SNC) Datasheet
4.2.2 Inbound Transactions to SIOH
Table 4-7. Intel
®
E8870 Chipset SAPIC Interrupt Message Routing and Delivery
Source Type Routing
SIOH Physical Directed Delivered to SNC with NodeId = A[8:4]#. Message is presented directly on processor
bus.
Physical Redirectable Delivered to SNC with NodeId = A[8:4]#. Redirection is performed by the SNC.
SNC, NodeId =
A[19:15]#
Physical Directed SNC completes transaction. The interrupt is not sent to the SP, because destination
node = source node of interrupt.
Physical Redirectable Redirection is performed by the SNC.The interrupt is not sent to the SP because
destination node = source node of interrupt.
SNC, NodeId
!= A[19:15]#
Physical Directed SNC delivers to SP, where the message is delivered to SNC with NodeId = A[8:4]#.
Message is presented directly on processor bus at the destination node.
Physical Redirectable SNC delivers to SP, where the message is delivered to SNC with NodeId = A[8:4]#.
Redirection is performed by the SNC on the destination node.
Table 4-8. Address Disposition for Inbound Transactions
Address Range
Inbound
Writes
Inbound
Reads
SIOH Behavior for Inbound SPS Behavior
0h to 09_FFFFh DRAM DRAM Issue Coherent Request to SP. Route to SNC according to MIR
registers. Apply Coherence
Protocol.
(0A_0000h to 0A_FFFFh or
0B_8000h to 0B_FFFFh)
AND (VGA_port = none)
DRAM DRAM Route to SPS,
Attr = DRAM.
Route to SNC according to MIR
registers. Apply Coherence
Protocol.
(0A_0000h to 0A_FFFFh or
0B_8000h to 0B_FFFFh)
AND (VGA_port = none)
Unclaimed Unclaimed Master Abort. N/A
(0A_0000h to 0A_FFFFh or
0B_8000h to 0B_FFFFh)
AND (VGA_port = local)
VGA Port Unclaimed Writes: Local peer-to-peer to VGA.
Reads: Master Abort.
N/A
(0A_0000h to 0A_FFFFh or
0B_8000h to 0B_FFFFh)
AND (VGA_port = remote)
VGA Port Unclaimed Writes: Remote peer-to-peer to
VGA port.
Reads: Master Abort.
Route to SIOH node specified by
VGA_PORT register.
0B_0000h to 0B_7FFFh
and (MDA_en = 1) and
(CB_local = 1)
CB Port Unclaimed Writes: Local peer-to-peer to CB.
Reads: Master Abort.
N/A
0B_0000h to 0B_7FFFh
and (MDA_en = 1) and
(CB_local = 0)
CB Port Unclaimed Writes: Remote peer-to-peer to CB
port.
Reads: Master Abort.
Route to SIOH node specified by
CB_PORT register.
0B_0000h to 0B_7FFFh
and (MDA_en = 0) and
(VGA_port = local)
VGA Port Unclaimed Writes: Local peer-to-peer to VGA
port.
Reads: Master Abort.
N/A
0B_0000h to 0B_7FFFh
and (MDA_en = 0) and
(VGA_port = remote)
VGA Port Unclaimed Writes: Remote peer-to-peer to
VGA port.
Reads: Master Abort.
Route to SIOH node specified by
VGA_PORT register.
0B_0000h to 0B_7FFFh
and (MDA_en = 0) and
(VGA_port = none)
Unclaimed Unclaimed Master Abort both reads and
writes.
N/A