Intel E3815 FH8065301567411 Data Sheet
Product codes
FH8065301567411
Intel
®
Atom™ Processor E3800 Product Family
Datasheet
1943
17.5.34
Port Mapping Register (MAP)—Offset 90h
Access Method
Default: 0420h
15
12
8
4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
DA
TA
Bit
Range
Default &
Access
Description
15:0
0h
RW
Data (DATA):
This 16-bit field is programmed by system software if MSI is enabled. Its
content is driven onto the lower word of the data bus of the MSI memory write
transaction.
Type:
PCI Configuration Register
(Size: 16 bits)
15
12
8
4
0
0
0
0
0
0
1
0
0
0
0
1
0
0
0
0
0
R
SVD0
SP
D0
SP
D
SMS
SC
R
SVD1
MV
Bit
Range
Default &
Access
Description
15:12
0b
RO
RSVD0:
Reserved
11:10
1h
RO
SATA Port Disable (SPD0):
A 1 in a bit position corresponding to the SATA port
prevents the SATA port from being enabled via config PCS.PxE. Write of 1 to PCS.PxE
has no effect when the corresponding SPD[x] bit is 1. In preventing a port(s) from being
enabled, BIOS shall first configure MAP.SPD. And only then BIOS configures the
PCS.PxE.
9:8
0h
RO
SATA Port Disable (SPD):
A 1 in a bit position corresponding to the SATA port
prevents the SATA port from being enabled via config PCS.PxE. Write of 1 to PCS.PxE
has no effect when the corresponding SPD[x] bit is 1. In preventing a port(s) from being
enabled, BIOS shall first configure MAP.SPD. And only then BIOS configures the
PCS.PxE.
7:6
0h
RW
SATA Mode Select (SMS):
Software (SW) programs these bits to control the mode in
which the SATA HBA should operate: 00b = IDE mode which requires LBC01.LBGE=1
(refer to LBC01, LBC23 and LBC45 register in SIR register space); 01b = AHCI mode;
10b = RAID mode; 11b = Reserved. Notes : SW shall not manipulate MAP.SMS during
runtime operation; i.e. the OS will not do this. The BIOS may choose to switch from one
mode to another during POST. IDE mode can be selected when AHCI and/or RAID are
enabled. After switching from AHCI/RAID back to IDE mode, the number of usable ports
on SATA Controller 1 shall be reduced to 4, dependent on SKUs. AHCI mode may only be
selected when MV = 00b. AHCI mode may be selected when RAID feature is enabled by
fuse. VLV does not support RAID mode. Programming these bits with values that are
illegal will result in in-deterministic behavior by the HW.