Renesas SH7781 - Manual (Page 604)

13. PCI Controller (PCIC)
Rev.1.00 Jan. 10, 2008 Page 574 of 1658
REJ09B0261-0100
(13) PCI I/O Base Address Register (PCIIBAR)
This register is the I/O space base address register of the PCI configuration register space header
that is defined in PCI local bus specification. This register specifies the base address in the I/O
space of the PCIC.
See section 13.4.4 (2), Accessing PCIC I/O Space.
0 1 2 3 4 5 6 7 8 9 10 11 12 13 15 14
ASI
⎯ IOB2 (lower) IOB1 (upper)
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
R R R R R R R R R/W R/W R/W R/W R/W R/W R/W R/W
Bit:
Initial value:
SH R/W:
R R R R R R R R R/W R/W R/W R/W R/W R/W R/W R/W PCI R/W:
16 17 18 19 20 21 22 23 24 25 26 27 28 29 31 30
IOB1 (upper)
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
Bit:
Initial value:
SH R/W:
R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W PCI R/W:
Bit Bit Name
Initial
Value R/W
Description
31 to 8 IOB1
(upper) H'000000 SH: R/W
PCI: R/W
I/O Space Base Address (upper 24 bits)
These bits specify the upper 24 bits of the base
address for the I/O space of the PCIC (PCIC control
register space).
7 to 2 IOB2
(lower) 000000 SH: R
PCI: R
I/O Space Base Address (lower 6 bits)
These bits are fixed to B'000000 by hardware.
1
⎯ 0 SH:
R
PCI: R
Reserved
This bit is always read as 0. The write value should
always be 0.
0 ASI 1 SH: R
PCI: R
Address Space Indicator
Indicates whether the base address indicated by this
register is in the I/O space or memory space.
0: Memory space
1: I/O space