beautypg.com

7 header type and bist register, 8 ohci base address register – Texas Instruments Dual/Single Socket CardBus and UntraMedia Controller PCI7621 User Manual

Page 166

background image

7−6

7.7

Header Type and BIST Register

The header type and built-in self-test (BIST) register indicates the PCI7x21/PCI7x11 PCI header type and no built-in
self-test. See Table 7−6 for a complete description of the register contents.

Bit

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

Name

Header type and BIST

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

1

0

0

0

0

0

0

0

Register:

Header type and BIST

Offset:

0Eh

Type:

Read-only

Default:

0080h

Table 7−6. Header Type and BIST Register Description

BIT

FIELD NAME

TYPE

DESCRIPTION

15−8

BIST

R

Built-in self-test. The PCI7x21/PCI7x11 controller does not include a BIST; therefore, this field returns
00h when read.

7−0

HEADER_TYPE

R

PCI header type. The PCI7x21/PCI7x11 controller includes the standard PCI header, which is
communicated by returning 80h when this field is read.

7.8

OHCI Base Address Register

The OHCI base address register is programmed with a base address referencing the memory-mapped OHCI control.
When BIOS writes all 1s to this register, the value read back is FFFF F800h, indicating that at least 2K bytes of
memory address space are required for the OHCI registers. See Table 7−7 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

OHCI 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

OHCI 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:

OHCI base address

Offset:

10h

Type:

Read/Write, Read-only

Default:

0000 0000h

Table 7−7. OHCI Base Address Register Description

BIT

FIELD NAME

TYPE

DESCRIPTION

31−11

OHCIREG_PTR

RW

OHCI register pointer. This field specifies the upper 21 bits of the 32-bit OHCI base address register.
The default value for this field is all 0s.

10−4

OHCI_SZ

R

OHCI register size. This field returns 0s when read, indicating that the OHCI registers require a
2K-byte region of memory.

3

OHCI_PF

R

OHCI register prefetch. Bit 3 returns 0 when read, indicating that the OHCI registers are
nonprefetchable.

2−1

OHCI_MEMTYPE

R

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.

0

OHCI_MEM

R

OHCI memory indicator. Bit 0 returns 0 when read, indicating that the OHCI registers are mapped
into system memory space.