User's Manual

Intel
®
IXP42X product line and IXC1100 control plane processors—PCI Controller
Intel
®
IXP42X Product Line of Network Processors and IXC1100 Control Plane Processor
DM September 2006
262 Order Number: 252480-006US
6.14.2.7 PCI Controller Configuration Port Read Data Register
(PCI_CRP_RDATA)
6.14.2.8 PCI Controller Control and Status Register
(PCI_CSR)
Register Name: PCI_CRP_RDATA
Hex Offset Address: 0xC0000018 Reset Hex Value: 0x00000000
Register
Description:
PCI configuration port read data register. Provides read data for CSR-initiated read accesses of the PCI
Controller PCI configuration registers in the PCI Core.
Access: See below.
31 0
CRP_RDATA
Register
PCI_CRP_RDATA
Bits Name Description
Reset
Value
PCI Access AHB Access
31:0 CRP_RDATA Read data for the configuration port read access. 0x00000000 RO RO
Register Name: PCI_CSR
Hex Offset Address: 0xC000001C Reset Hex Value: 0x0000000x
Register
Description:
Control and status for the PCI Controller.
Access: See below.
31 17161514 9876543210
(Reserved)
PRST
IC (Reserved)
ASE
(Rsvd)
DBT
ABE
PBS
ABS
ARBEN
HOST
Register PCI_CSR (Sheet 1 of 2)
Bits Name Description
Reset
Value
PCI Access AHB Access
31:1
7
(Reserved) – Read as 0 0x0000 RO RO
16 PRST
PCI Reset, When set to a 1, initializes the PCI controller
flip flops clocked by the PCI clock.
0x0 RO RW
15 IC
Initialization Complete. When at a logic 0 state, forces the
PCI Controller Target Interface to retry PCI cycles. When
set to a 1, PCI cycles will be accepted.
0RORW
14:9 (Reserved) – Read as 0 0x00 RO RO
8ASE
Assert System Error. When set to a 1, the PCI SERR#
output (PCI_SERR_N) will be asserted for 1 PCI clock
cycle if the pci_srcr.SER bit is set.
0RORW
7:6 (Reserved) – Read as 0 00 RO RO
5DBT
Doorbell Test mode enable. When set to a 1, the doorbell
registers pci_ahbdoorbell, pci_pcidoorbell become normal
read/write registers from the AHB bus.
0RORW