307013-003 Datasheet, PDF (718/848 Pages) Intel Corporation – Intel I/O Controller Hub 7

Intel® High Definition Audio Controller Registers (D27:F0)
19.1.26 MID—MSI Capability ID Register
(Intel^® High Definition Audio Controller—D27:F0)
Address Offset: 60h–61h
Default Value: 7005h
Attribute:
Size:
RO
16 bits
Bit
Description
15:8
7:0
Next Capability (Next) — RO. Hardwired to 70h. Points to the PCI Express* capability
structure.
Cap ID (CAP) — RO. Hardwired to 05h. Indicates that this pointer is a MSI capability
19.1.27 MMC—MSI Message Control Register
(Intel^® High Definition Audio Controller—D27:F0)
Address Offset: 62h–63h
Default Value: 0080h
Attribute:
Size:
RO, R/W
16 bits
Bit
Description
15:8 Reserved
7
64b Address Capability (64ADD) — RO. Hardwired to 1 indicating the ability to generate
a 64-bit message address
6:4
Multiple Message Enable (MME) — RO. Normally this is a R/W register. However, since
only 1 message is supported, these bits are hardwired to 000 = 1 message.
3:1
Multiple Message Capable (MMC) — RO. Hardwired to 0 indicating request for 1
message.
MSI Enable (ME) — R/W.
0 0 = an MSI may not be generated
1 = an MSI will be generated instead of an INTx signal.
19.1.28 MMLA—MSI Message Lower Address Register
(Intel^® High Definition Audio Controller—D27:F0)
Address Offset: 64h–67h
Default Value: 00000000h
Attribute:
Size:
RO, R/W
32 bits
Bit
Description
31:2 Message Lower Address (MLA) — R/W. Lower address used for MSI message.
1:0 Reserved.
19.1.29 MMUA—MSI Message Upper Address Register
(Intel^® High Definition Audio Controller—D27:F0)
Address Offset: 68h–6Bh
Default Value: 00000000h
Attribute:
Size:
R/W
32 bits
Bit
Description
31:0
Message Upper Address (MUA) — R/W. Upper 32-bits of address used for MSI
message.
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Intel ^® ICH7 Family Datasheet