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Format of OpenHCI Host Controller memory-mapped registers

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Offset Size Description

00h

DWORD

"HcRevision" OpenHCI revision (see #00903)

04h

DWORD

"HcControl" HC operating modes (see #00904)

08h

DWORD

"HcCommandStatus" command/status (see #00905)

0Ch

DWORD

"HcInterruptStatus" interrupt status (see #00906)

10h

DWORD

"HcInterruptEnable" enable interrupts (see #00907)

14h

DWORD

"HcInterruptDisable" disable interrupts (see #00907)

18h

DWORD

"HcHCCA" HC Communications Area (see #00908)

1Ch

DWORD

"HcPeriodCurrentED" Endpoint Descriptor addr (see #00909)

20h

DWORD

"HcControlHeadED" Control Endpoint Descriptor (see #00910)

24h

DWORD

"HcControlCurrentED" Control Endpoint Descriptor (see #00910)

28h

DWORD

"HcBulkHeadED" Bulk Endpoint Descriptor (see #00911)

2Ch

DWORD

"HcBulkCurrentED" Bulk Endpoint Descriptor (see #00911)

30h

DWORD

"HcDoneHead" last completed Xfer Descr. (see #00912)

34h

DWORD

"HcFmInterval" Frame bit-time interval (see #00913)

38h

DWORD

"HcFmRemaining" bit time remaining in Frame (see #00914)

3Ch

DWORD

"HcFmNumber" Frame Number (bits 15-0)

40h

DWORD

"HcPeriodicStart" earliest time to start periodic list (bits 13-0)

44h

DWORD

"HcLSThreshold" threshold for Low Speed transaction (bits 11-0)

48h

DWORD

"HcRhDescriptorA" Root Hub Descriptor A (see #00915)

4Ch

DWORD

"HcRhDescriptorB" Root Hub Descriptor B (see #00916)

50h

DWORD

"HcRhStatus" Root Hub status (see #00917)

54h

N DWORDs

"HCRhPortStatus[1-N]" Root Hub port status N (see #00918)

Note:

OpenHCI reserves a full 4K page of the systems address space for its memory-mapped registers.

See Also:

#00878,#00882,#F0085,#00966