Ahb I/O Base Address Register; Pci Memory Base Address Register - Intel IXP45X Developer's Manual

®
PCI Controller—Intel IXP45X and Intel
Register
Bits Name
31:2 Upper 8 AHB address bits for PCI accesses that target pci_bar0. By default
AHBbase0
4 this register maps to an upper region of the AHB memory map.
23:1
AHBbase1 Upper 8 AHB address bits for PCI accesses that target pci_bar1.
6
15:8 AHBbase2 Upper 8 AHB address bits for PCI accesses that target pci_bar2.
7:0 AHBbase3 Upper 8 AHB address bits for PCI accesses that target pci_bar3.
10.5.3.13

AHB I/O Base Address Register

Register Name:
Block
0xC00000
Base Address:
Provides upper 24 AHB address bits for PCI accesses of AHB I/O
Register Description:
space. Lower 8 bits of AHB address provided directly from PCI bus.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
(Reserved)
Register
Bits Name
31:2
reserved Reserved – read as 0
4
23:0 IObase Upper 24 AHB address bits for PCI accesses that target pci_bar5.
10.5.3.14

PCI Memory Base Address Register

Register Name:
Block
0xC00000
Base Address:
Provides upper 8 PCI address bits for AHB accesses of PCI memory
space. Lower 24 bits of PCI address provided directly from the AHB
Register Description:
bus. Four Membase fields correspond to accesses from the AHB
bus that target specific AHB address ranges.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
Membase0
August 2006
Order Number: 306262-004US
®
IXP46X Product Line of Network Processors
pci_ahbmembase
Description
pci_ahbiobase
Offset Address
pci_ahbiobase
Description
pci_pcimembase
Offset Address
Membase1
®
Intel IXP45X and Intel
Reset
Value
0xc0
0x00
0x00
0x00
0x30
Reset Value
8 7 6
IObase
Reset
Value
0x00
0x0000
00
0x34
Reset Value
8 7 6
Membase2
®
IXP46X Product Line of Network Processors
PCI AHB
Access Access
RO RW
RO RW
RO RW
RO RW
0x00000000
Access: (See below.)
5 4 3 2 1 0
PCI AHB
Access Access
RO RO
RO RW
0x00000000
Access: (See below.)
5 4 3 2 1 0
Membase3
Develepor's Manual
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