Format of OpenHCI Host Controller memory-mapped registers |
| 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: |