AMD SB600 - Manual (Page 43)

©2008 Advanced Micro Devices, Inc. SATA Registers (Device 18, Function 0)
AMD SB600 Register Reference Manual Proprietary Page 43
Port-N Serial ATA Active – RW – 32 bits [Mem_reg: ABAR + port offset + 34h]
Field Name Bits Default Description
Device Status (DS) 31:0 00000000h
This field is bit significant. Each bit corresponds to the TAG
and command slot of a native queued command, where bit 0
corresponds to TAG 0 and command slot 0. This field is set
by software prior to issuing a native queued command for a
particular command slot. Prior to writing PxCI[TAG] to ‘1’,
software will set DS[TAG] to ‘1’ to indicate that a command
with that TAG is outstanding. The device clears bits in this
field by sending a Set Device Bits FIS to the host. The HBA
clears bits in this field that are set to ‘1’ in the SActive field of
the Set Device Bits FIS. The HBA only clears bits that
correspond to native queued commands that have completed
successfully.
Software should only write this field when PxCMD.ST is set to
‘1’. This field is cleared when PxCMD.ST is written from a ‘1’
to a ‘0’ by software. This field is not cleared by a
COMRESET or a software reset.
Port-N Command Issue – RW – 32 bits [Mem_reg: ABAR + port offset + 38h]
Field Name Bits Default Description
Commands Issued (CI) 31:0 00000000h
This field is bit significant. Each bit corresponds to a
command slot, where bit 0 corresponds to command slot 0.
This field is set by software to indicate to the HBA that a
command has been built in system memory for a command
slot and may be sent to the device. When the HBA receives
a FIS which clears the BSY, DRQ, and ERR bits for the
command, it clears the corresponding bit in this register for
that command slot. Bits in this field shall only be set to ‘1’ by
software when PxCMD.ST is set to ‘1’.
This field is also cleared when PxCMD.ST is written from a ‘1’
to a ‘0’ by software.
Port- N SNotification – RWC – 32 bits [Mem_reg: ABAR + port offset + 3Ch]
Field Name Bits Default Description
PM Notify ( PMN) 15:0 0000h This field indicates whether a particular device with the
corresponding PM Port number issued a Set Device Bits FIS
to the host with the Notification bit set.
PM Port 0h sets bit 0
…
PM Port Fh sets bit 15
Individual bits are cleared by software writing 1’s to the
corresponding bit positions.
This field is reset to default on a HBA Reset, but it is not reset
by COMRESET or software reset.
Reserved 31:16 Reserved