AMD SB600 User Manual
Page 77
©2008 Advanced Micro Devices, Inc.
OCHI USB 1.1 and EHCI USB 2.0 Controllers
AMD SB600 Register Reference Manual
Proprietary
Page 77
PME Data / Status – RW - 32 bits - [PCI_Reg : C4h]
Field Name
Bits
Default
Description
B2_B3#
22
1b
Read only.
The state of this bit determines the action that is to occur as a
direct result of programming the function to D3
hot.
.
A “1”
indicates that when the bridge function is programmed to
D3
hot
, its secondary bus’s PCI clock will be stopped (B2).
BPCC_En
23
0b
Read only.
A “0” indicates that the bus power/clock control policies are
disabled. When the Bus Power/Clock Control mechanism is
disabled, the bridge’s PMCSR PowerState field cannot be
used by the system software to control the power or clock of
the bridge’s secondary bus.
Data
31:24
00h
Read only.
This register is used to report the state dependent data
requested by the Data_Select field. The value of this register
is scaled by the value reported by the Data_Scale field.
MSI Control – RW - 32 bits - [PCI_Reg : D0h]
Field Name
Bits
Default
Description
MSI USB
7:0
05h
MSI USB ID. Read only.
Next Item Pointer
15:8
E4h
Pointer to next capability structure
MSI Control Out
16
0b
Set to 1 to disable IRQ. Use MSI instead.
Reserved 19:17
0h
Reserved
MSI Control
22:20
0h
MSI control field
64-bit Address Capable
23
0b
If EHCI is in 64 bit address mode as specified by 64-bit
Addressing Capability bit in HCCPARAMS register [MEM
Reg: 08h] , this bit is set to 1 indicating that EHCI is capable
of generating a 64-bit message address. Otherwise it is set
to 0 indicating the EHCI is not capable of generating a 64-bit
address.
Read only
Reserved 31:24
00h
Reserved
MSI Address – RW - 32 bits - [PCI_Reg : D4h]
Field Name
Bits
Default
Description
MSI Address
31:0
0h
System-specified message address.
MSI Data – RW - 16 bits - [PCI_Reg : D8h]
Field Name
Bits
Default
Description
MSI Data
15:0
0h
System-specified message
DBUG_PRT Control – R - 32 bits - [PCI_Reg : E4h]
Field Name
Bits
Default
Description
CAP_ID
7:0
0Ah
The value of 0Ah in this field identifies that the function
supports a Debug Port.
Next Item Pointer
15:8
00h
Pointer to next capability structure
Offset
28:16
0E0h
This 12 bit field indicates the byte offset (up to 4K) within the
BAR indicated by BAR#. This offset is required to be
DWORD aligned and therefore bits 16 and 17 are always
zero.