L-FW323-06-DB AGERE [Agere Systems], L-FW323-06-DB Datasheet - Page 29

• Manufacturer Part Number: L-FW323-06-DB
• Description: PCI PHY/Link Open Host Controller Interface
• Manufacturer: AGERE [Agere Systems]

Data Sheet, Rev. 1
December 2005
Internal Registers
OHCI Base Address Register
The OHCI Base Address register is programmed with a base address referencing the memory-mapped OHCI con-
trol. When BIOS writes all 1s to this register, the value read back is FFFF F000h, indicating that 4 Kbytes of mem-
ory address space are required for the OHCI registers.
Offset:
Default:
Type:
Reference:
Table 9. OHCI Base Address Register Description
Agere Systems Inc.
31:12
11:4
Bit
2:1
3
0
OHCI_MEMTYPE
OHCIREG_PTR
10h
0000 0000h
Read/write
PCI Local Bus Specification, Rev. 2.2, Sections 6.2.5 and 1394 Open Host Controller Interface
Specification, Rev. 1.1, Section A.3.5
Field Name
OHCI_MEM
OHCI_SZ
OHCI_PF
(continued)
Type
RW
R
R
R
R
OHCI Register Pointer. Specifies the upper 20 bits of the 32-bit OHCI
base address.
OHCI Register Size. This field returns 0s when read, indicating that
the OHCI registers require a 4 Kbyte region of memory.
OHCI Register Prefetch. This bit returns 0 when read, indicating that
the OHCI registers are not prefetchable.
OHCI Memory Type. This field returns 0s when read, indicating that
the OHCI Base Address register is 32 bits wide and mapping can be
done anywhere in the 32-bit memory space.
OHCI Memory Indicator. This bit returns 0 when read, indicating that
the OHCI registers are mapped into system memory space.
PCI PHY/Link Open Host Controller Interface
Description
FW323 06 1394a
29