Datasheet 583
SATA Controller Registers (D31:F2)
14.3 Serial ATA Index/Data Pair Superset Registers
All of these I/O registers are in the core well. They are exposed only when SCC is 01h
(that is, IDE programming interface).
These are Index/Data Pair registers that are used to access the SerialATA superset
registers (SerialATA Status (PxSSTS), SerialATA Control (PxSCTL) and SerialATA Error
(PxSERR)). The I/O space for these registers is allocated through SIDPBA. Locations
with offset from 08h to 0Fh are reserved for future expansion. Software-write
operations to the reserved locations will have no effect while software-read operations
to the reserved locations will return 0.
14.3.1 SINDX—Serial ATA Index (D31:F2)
Address Offset: SIDPBA + 00h Attribute: R/W
Default Value: 00000000h Size: 32 bits
Offset Mnemonic Register
00h–03h SINDEX Serial ATA Index
04h–07h SDATA Serial ATA Data
08h–0Ch — Reserved
0Ch–0Fh — Reserved
Bit Description
31:16 Reserved
15.8
Port Index (PIDX)—R/W. This Index field is used to specify the port of the SATA
controller at which the port-specific SSTS, SCTL, and SERR registers are located.
00h = Primary Master (Port 0)
01h = Primary Slave (Port 2)
02h = Secondary Master (Port 1)
03h = Secondary Slave (Port 3)
All other values are Reserved.
7:0
Register Index (RIDX)—R/W. This index field is used to specify one out of three
registers currently being indexed into. These three registers are the Serial ATA superset
SStatus, SControl and SError memory registers and are port specific, hence for this
SATA controller, there are four sets of these registers. Refer to Section 14.4.2.10,
Section 14.4.2.11, and Section 14.4.2.12 for definitions of the SStatus, SControl and
SError registers.
00h = SSTS
01h = SCTL
02h = SERR
All other values are Reserved.
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