307013-003 Datasheet, PDF (527/848 Pages) Intel Corporation – Intel I/O Controller Hub 7

SATA Controller Registers (D31:F2) (Desktop and Mobile Only)
12.3.1.3
IS—Interrupt Status Register (D31:F2)
Address Offset: ABAR + 08h–0Bh
Default Value: 00000000h
Attribute:
Size:
R/WC, RO
32 bits
This register indicates which of the ports within the controller have an interrupt pending
and require service.
Bit
Description
31:4 Reserved. Returns 0.
3
(Mobile
Only)
Reserved. Returns 0.
3
(Intel^®
ICH7R and
ICH7DH
Only)
Interrupt Pending Status Port[3] (IPS[3]) — R/WC.
0 = No interrupt pending.
1 = Port 3 has an interrupt pending. Software can use this information to determine
which ports require service after an interrupt.
Interrupt Pending Status Port[2] (IPS[2]) — R/WC
2
0 = No interrupt pending.
1 = Port 2 has an interrupt pending. Software can use this information to determine
which ports require service after an interrupt.
1
(Mobile
Only)
Reserved. Returns 0.
1
(ICH7R
and
ICH7DH
Only)
Interrupt Pending Status Port[1] (IPS[1]) — R/WC.
0 = No interrupt pending.
1 = Port 1has an interrupt pending. Software can use this information to determine
which ports require service after an interrupt.
Interrupt Pending Status Port[0] (IPS[0]) — R/WC.
0
0 = No interrupt pending.
1 = Port 0 has an interrupt pending. Software can use this information to determine
which ports require service after an interrupt.
Intel ^® ICH7 Family Datasheet
527