EP80579 Datasheet, PDF (418/1916 Pages) Intel Corporation – Intel® EP80579 Integrated Processor Product Line

Intel^® EP80579 Integrated Processor
16.1.1.35 Offset CEh: HECBASE - PCI Express Port A (PEA) Enhanced
Configuration Base Address Register
Configuration software reads this register to determine where the 256 Mbyte range of
addresses resides for this particular host bridge. This register contains the base
address of enhanced configuration memory.
Table 16-37. Offset CEh: HECBASE - PCI Express Port A (PEA) Enhanced Configuration Base
Address Register
Description:
View: PCI
BAR: Configuration
Bus:Device:Function: 0:0:0
Offset Start: CEh
Offset End: CFh
Size: 16 bit
Default: E000h
Power Well: Core
Bit Range
15 : 12
11 : 00
Bit Acronym
Bit Description
Sticky
HECBASE
Reserved
PEA Enhanced Configuration Base: This register
contains the address that corresponds to bits 31 to 28 of
the base address for PEA enhanced configuration space
below 4 Gbyte. Configuration software reads this register
to determine where the 256 Mbyte range of addresses
resides for this particular host bridge. BIOS needs to write
this register at boot time. Settings 0 and F are not valid.
When any byte or combination of bytes of this register is
written, the register value locks down and cannot be
further updated.
Reserved.
Bit Reset
Value
1110b
000h
Bit Access
RWO
16.1.1.36 Offset D8h: CACHECTL0 - Write Cache Control 0 Register
Table 16-38. Offset D8h: CACHECTL0 - Write Cache Control 0 Register
Description:
View: PCI
BAR: Configuration
Bus:Device:Function: 0:0:0
Offset Start: D8h
Offset End: D8h
Size: 8 bit
Default: 00h
Power Well: Core
Bit Range
07 : 01
00
Bit Acronym
Bit Description
Sticky
Reserved
WCFLUSH
Reserved for other customer visible features.
Write Cache Flush:
0 = Cleared by hardware when flush is complete.
1 = All entries in the write cache are flushed to DRAM with
high priority. The arbiter no longer accepts requests
until the write cache has been flushed. Software can
poll this bit to determine when the flush is complete.
Bit Reset
Value
00h
0b
Bit Access
RO
RWS
Intel^® EP80579 Integrated Processor Product Line Datasheet
418
August 2009
Order Number: 320066-003US