10 cardbus cis base address register, 11 cardbus cis pointer register – Texas Instruments Dual/Single Socket CardBus and UntraMedia Controller PCI7621 User Manual
Page 168
7−8
7.10 CardBus CIS Base Address Register
The internal CARDBUS input to the 1394 OHCI core is tied high such that this register returns 0s when read. See
Table 7−9 for a complete description of the register contents.
Bit
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
Name
CardBus CIS base address
Type
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
Default
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Name
CardBus CIS base address
Type
RW
RW
RW
RW
RW
R
R
R
R
R
R
R
R
R
R
R
Default
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Register:
CardBus CIS base address
Offset:
18h
Type:
Read/Write, Read-only
Default:
0000 0000h
Table 7−9. CardBus CIS Base Address Register Description
BIT
FIELD NAME
TYPE
DESCRIPTION
31−11
CIS_BASE
RW
CIS base address. This field specifies the upper 21 bits of the 32-bit CIS base address. If CARDBUS
is sampled high on a GRST, then this field is read-only, returning 0s when read.
10−4
CIS_SZ
R
CIS address space size. This field returns 0s when read, indicating that the CIS space requires a
2K-byte region of memory.
3
CIS_PF
R
CIS prefetch. Bit 3 returns 0 when read, indicating that the CIS is nonprefetchable. Furthermore, the
CIS is a byte-accessible address space, and either a doubleword or 16-bit word access yields
indeterminate results.
2−1
CIS_MEMTYPE
R
CIS memory type. This field returns 0s when read, indicating that the CardBus CIS base address
register is 32 bits wide and mapping can be done anywhere in the 32-bit memory space.
0
CIS_MEM
R
CIS memory indicator. Bit 0 returns 0 when read, indicating that the CIS is mapped into system
memory space.
7.11 CardBus CIS Pointer Register
The internal CARDBUS input to the 1394 OHCI core is tied high such that this register returns 0s when read.
Bit
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
Name
CardBus CIS pointer
Type
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
Default
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Name
CardBus CIS pointer
Type
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
Default
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Register:
CardBus CIS pointer
Offset:
28h
Type:
Read-only
Default:
0000 0000h