Intel C2338 FH8065501516761 Ficha De Dados
Códigos do produto
FH8065501516761
Intel
®
Atom™ Processor C2000 Product Family for Microserver
September 2014
Datasheet, Vol. 2 of 3
Order Number: 330061-002US
563
Volume 2—I/O Advanced APIC (I/O APIC)—C2000 Product Family
Architectural Overview
30.3.1
APIC ID and Version Registers
The I/O APIC has a 32-bit APIC Identification register and a 32-bit Version register.
30.3.2
Interrupt Redirection Registers
The SoC I/O APIC accommodates up to 24 I/O interrupts. It provides a 64-bit I/O-
Interrupt Redirection register for each. The Redirection register contains:
• An 8-bit Destination ID (DID) of the local APIC for the interrupt.
• An 8-bit Extended Destination ID (DID) of the local APIC for the interrupt.
• 4 bits to indicate the mask, trigger mode, remote IRR (for trigger mode), and
• An 8-bit Extended Destination ID (DID) of the local APIC for the interrupt.
• 4 bits to indicate the mask, trigger mode, remote IRR (for trigger mode), and
polarity for the interrupt.
• 5 bits for the interrupt delivery mode and delivery status.
• 8 bits containing the interrupt Vector (VCT) with values of 10h through FEh.
• 8 bits containing the interrupt Vector (VCT) with values of 10h through FEh.
The MSIs generated by the I/O APIC are sent as 32-bit memory writes to the local
APIC. The Destination ID (DID) and Extended Destination ID (EDID) are used to target
a specific processor core local APIC.
30.3.3
Accessing the I/O APIC Internal Registers
The I/O APIC internal registers are accessed indirectly. They are accessed using three
registers in the memory space. The three registers have fixed memory addresses as
shown in
• The 32-bit APIC Identification register is accessed through this mechanism.
• The 32-bit Version register is accessed through this mechanism.
• The twenty-four, 64-bit Redirection Table Entries (RTE0 through RTE23) are only
• The 32-bit Version register is accessed through this mechanism.
• The twenty-four, 64-bit Redirection Table Entries (RTE0 through RTE23) are only
• Some of the 256 registers are reserved. See
The registers that appear in the WDW register are described in the following sections
and tables.
Table 30-2. I/O APIC Register Access and EOI Register
Fixed Address
in the Memory
Space
Default
Name
Description
0xFEC00000
00h
IOAPIC_IDX
0xFEC00010
0000_0000h
IOAPIC_WDW
0xFEC00040
0000_0000h
IOAPIC_EOI