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©2008 Advanced Micro Devices, Inc.
SATA Registers (Device 18, Function 0)
AMD SB600 Register Reference Manual Proprietary Page 25
Bus-master IDE Status - RW- 8 bits - [IO_Reg: BAR4 + 02/0Ah]
Field Name Bits Default Description
Bus Master Active 0 0b Bus Master IDE active. This bit is set to 1 when bit 0 in the Bus
Master IDE command address register is set to 1. The IDE host
controller sets this bit to 0 when the last transfer for a region is
performed. This bit is also set to 0 when bit 0 of the Bus Master
IDE command register is set to 0.
Bus Master DMA Error 1 0b IDE DMA error. This bit is set when the IDE host controller
encounters a target abort, master abort, or Parity error while
transferring data on the PCI bus. Write ‘1’ clears this bit
IDE Interrupt 2 0b IDE Interrupt. Indicates when an IDE device has asserted its
interrupt line. IRQ14 is used for the Primary channel and IRQ15 is
used for the secondary channel. If the interrupt status bit is set to
0, by writing a 1 to this bit while the interrupt line is still at the
active level, this bit remains 0 until another assertion edge is
detected on the interrupt line.
Reserved 4:3 Reserved.
Master Device DMA
Capable
5 0b Device 0 (Master) DMA capable.
Slave Device DMA
Capable
6 0b Device 1 (Slave) DMA capable.
Simplex Only 7 0b Read Only
Simplex only. This bit is hard-wired as 0.
Descriptor Table Pointer - RW- 32 bits - [IO_Reg: BAR4 + 04/0Ch]
Field Name Bits Default Description
Reserved 1:0 0h Reserved. Always read as 0’s.
Descriptor Table Base
Address
31:2 0000_0000h Base Address of Descriptor Table. These bits correspond to
Address [31-02].
2.1.4 BAR5 Registers
These are the AHCI memory map registers. The base address is defined through the ABAR (BAR5) register.
Register Name Offset Address
Generic Host Control 00h-23h
Reserved
24h-9Fh
Vendor Specific registers A0h-FFh
Port 0 port control registers 100h-17Fh
Port 1 port control registers 180h-1FFh
Port 2 port control registers 200h-27Fh
Port 3 port control registers 280h-2FFh
2.1.4.1 Generic Host Control
The following registers apply to the entire HBA.
Register Name Offset Address
Host Capabilities(CAP) 00h-03h
Global Host Control(GHC) 04h-07h
Interrupt Status(IS) 08h-0Bh
Ports Implemented(PI) 0Ch-0Fh
Version(VS) 10h-13h
Command Completion Coalescing Control(CCC_CTL) 14h-17h
Command Completion Coalescing Ports(CCC_PORTS) 18h-1Bh
Enclosure Management Location(EM_LOC) 1Ch-1Fh
Enclosure Management Control(EM_CTL) 20h-23h