AMD SB600 User Manual
Page 230
©2008 Advanced Micro Devices, Inc.
HD Audio Controllers Registers
AMD SB600 Register Reference Manual
Proprietary
Page 230
Interrupt Line – RW – 8 bits – [PCI_Reg: 3Ch]
Field Name
Bits
Default
Description
Interrupt Line
7:0
00h
This register is used to communicate to software the
interrupt line that the interrupt pin is connected to. It is not
used by the HD Audio controller.
Interrupt Pin – R – 8 bits – [PCI_Reg: 3Dh]
Interrupt Pin
3:0
1h
This register reflects the value programs into Interrupt
Control Pin register at offset 44h, bits[3:0]
Reserved 7:4
0h
Reserved
Minimum Grant – R – 8 bits – [PCI_Reg: 3Eh]
Field Name
Bits
Default
Description
Minimum Grant
7:0
00h
Hardwired to “0”.
Maximum Latency – R – 8 bits – [PCI_Reg: 3Fh]
Field Name
Bits
Default
Description
Maximum Latency
7:0
00h
Hardwired to “0”.
Misc Control Register – RW – 8 bits – [PCI_Reg: 42h]
Field Name
Bits
Default
Description
Disable Non-noop
0
0b
1: Non-snoop attribute is disabled on Buffer Descriptor and
Data Buffer DMA.
0: Set the Non-snoop attribute on Buffer Descriptor and
Data Buffer DMA when the Traffic Priority bit is set in the
Stream Descriptor.
Disable Non-snoop
Override
1
0b
1: Bit[0] of this register controls the Non-snoop attribute
0: override the bit[0] setting meaning always generate No
Snoop attribute on Buffer Descriptor and Data Buffer DMA
Enable Non-snoop
Request
2
0b
1: Enable Non-snoop request to ACPI
0: Disable Non-snoop request to ACPI
When enabled and the DMA cycle is Non-snoop, ACPI will
not generate a wake to CPU in C2 state.
Reserved
7:3 00h
Reserved
Interrupt Pin Control Register – RW – 8 bits – [PCI_Reg: 44h]
Field Name
Bits
Default
Description
Interrupt Pin Control
3:0
1h
Controls the value reports in Interrupt Pin Register at offset
0x3D.
Reserved
7:4 0h
Reserved
Power Management Capability ID – R – 16 bits – [PCI_Reg: 50h]
Field Name
Bits
Default
Description
Capability ID
7:0
01h
Hardwired to 01h. Indicates PCI Power Management
Capability.
Next Capability Pointer
15:8
60h
Hardwired to 60h.
Next capability is at offset 60h