45
Interrupts
2
PCI Device Interrupt Map
The PCI bus-based external devices include the PMC sites, Ethernet controller and the
PCI-to-PCI bridge. The default BIOS maps these external devices to the PCI Interrupt
Request (PIRQx) lines of the ICH2. This mapping is illustrated in Figure 2-1 on
page 46 and is defined in Table 2-4.
The device PCI interrupt lines (INTA through INTD) that are present on each device
cannot
be modified.
Table 2-4
PCI Device Interrupt Mapping by the BIOS
DEVICE
COMPONENT
VENDOR
ID
DEVICE
ID
CPU
ADDRESS
MAP ID
SELECT
PCI IRQ
Arbitration
Request
Line
PCI-to-PCI Bridge
Intel 21154
0x1011
0x0026
AD26
N/A
REQ0
Timer/SRAM FPGA VMIC Proprietary 0x114A
0x6504
AD20
INTD
N/A
PMC1
N/A
N/A
N/A
AD31
INTC
REQ3
PMC2
N/A
N/A
N/A
AD30
INTA
REQ2
Ethernet Controller
Intel 82559ER
0x8086
0x1209
AD22
INTE
REQ1
PCI Host Bridge
GMCH
0x8086
0x1130
N/A
N/A
N/A
VGA Controller
GMCH
0x8086
0x1132
N/A
N/A
N/A
PCI-LPC Bridge
ICH2
0x8086
0x2440
N/A
N/A
N/A
VGA Controller
ICH2
0x8086
0x2442
N/A
N/A
N/A
USB Controller #1
ICH2
0x8086
0x2443
N/A
N/A
N/A
SMBus Controller
ICH2
0x8086
0x2444
N/A
N/A
N/A
USB Controller #2
ICH2
0x8086
0x244B N/A
N/A
N/A
PCI-to-Hub Bridge
ICH2
0x8086
0x244B N/A
N/A
N/A
Содержание VMICPCI-7755
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