EP80579 Datasheet, PDF (116/1916 Pages) Intel Corporation – Intel® EP80579 Integrated Processor Product Line

Intel^® EP80579 Integrated Processor
Table 3-2.
Basic CMI Platform Address Space Requirements for IMCH and IICH Devices
0
2
31
LPC/SPI
SATA
N/A
I/O
I/O
I/O
I/O
I/O
Mem
N/A
8B
4B
8B
4B
16B
1KB
PCMDBA (see Section 23.1.1.8, “Offset
10h: PCMDBA – Primary Command Block
Base Address Register”)
PCTLBA (see Section 23.1.1.9, “Offset
14h: PCTLBA – Primary Control Block Base
Address Register”)
SCMDBA (see Section 23.1.1.10, “Offset
18h: SCMDBA – Secondary Command
Block Base Address Register”)
SCTLBA
LBAR (see Section 23.1.1.12, “Offset 20h:
LBAR – Legacy Bus Master Base Address
Register”)
ABAR (see Section 23.1.1.13, “Offset 24h:
ABAR – AHCI Base Address Register”)
3
SMBUS
N/A
N/A
The IMCH and IICH devices in the EP80579 on PCI bus 0 allocate 18KB of memory
space above and beyond the PCI L allocations in Figure 3-2 and 72B of I/O space
through PCI BARs (this memory could be allocated in the “open” regions in Figure 3-2).
This table does not include any memory regions that external devices (i.e., those
attached to a IMCH PCI Express* port) or AIOC devices might allocate.
In addition to the IMCH and IICH devices, the EP80579 includes an IA-32 core that
provides MSRs and other configuration structures.
3.3
High-Level Views
This section presents an overview of some of the general characteristics of the agents
that the various EP80579 memory maps expose.
3.3.1
Characteristics of External System Memory (DRAM)
The address spaces in the EP80579 expose up to 4GB of physical system memory, in
the form of DRAM, to be accessed by both on- and off-die agents.
Table 3-3.
Memory Regions
Region
Managed By
Accesses to System Memory by AIOC
Agents Coherent with IA Caches?
Contents
IA O/S
IA O/S
Y
IA O/S and application code
and data structures
IA/ASU Shared
(Coherent)
EP80579 Driver^a
Y
IA and AIOC shared data
structures
IA/ASU Shared
(AIOC-Direct)
EP80579 Driver^a
N
AIOC data structures; IA-32
core may access a portion
via the EP80579 driver
a. The EP80579 Driver includes the EP80579-specific software stacks that run on the IA, ASU, etc.
Intel^® EP80579 Integrated Processor Product Line Datasheet
116
August 2009
Order Number: 320066-003US