
PCI-X to Serial ATA Controller
Data Sheet
one. This bit is set to one by the Global reset, which is set by a PCI reset, and remains set until cleared by the
host (by writing a one to bit 0 of the Port Control Clear register).
The register bits that are not initialized by the Port Reset are:
OOB Bypass (bit 25) in Port Control (this register)
Port PHY Configuration register (all bits)
7.3.4 Port Status
Address Offset: 1000
H
Access Type: Read
Reset Value: 0x001F_0001
Silicon Image, Inc.
2006 Silicon Image, Inc.
SiI-DS-0160-C
70
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
P
Reserved
O
Reserved
Active Slot
L
A
P
I
I
3
S
C
T
R
P
L
I
P
D
P
This register is used to determine the status of various port functions.
Bit [31]
: Port Ready (R). This bit reports the Port Ready status. The transition from 0 to 1 of this bit generates
the Port Ready Interrupt Status (bit 18/2 of the Port Interrupt Status register).
Bit [30:26,24:21]
: Reserved (R). These bits are reserved.
Bit [20:16]
: Active Slot (R). This bit field contains the slot number of the command currently being executed.
When a command error occurs, this bit field indicates the slot containing the command in error.
Bit [25,15:0]
: These bits reflect the current state of the corresponding bits in the Port Control register. Refer to
the Port Control Set register for a complete description.
7.3.5 Port Control Clear
Address Offset: 1004
H
Access Type: Write One To Clear
Reset Value: N/A
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Reserved
O
Reserved
L
A
P
R
3
S
C
T
R
P
L
I
R
P
This register is used to direct various port operations. A one written to a bit position clears that bit in the control register.
Bit [31:26,24:16,12:11,6,2:1]
: Reserved (R). These bits are reserved.
Bit [25,15:13,10:7,5:3,0]
: (W1C) Writing a one to these bits clears the associated bit position of the Port Control
register. Refer to the Port Control Set register for bit descriptions.
7.3.6 Port Interrupt Status
Address Offset: 1008
H
Access Type: Read/Write 1 Clear
Reset Value: 0x0000_0000
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00