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;   this gives page-aligned data.
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;   this gives page-aligned data.
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struct uhci_controller
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struct uhci_controller
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; ------------------------------ hardware fields ------------------------------
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; ------------------------------ hardware fields ------------------------------
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FrameList       rd      1024
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FrameList       rd      1024
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; Entry n corresponds to the head of the frame list to be executed in
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; Entry n corresponds to the head of the frame list to be executed in
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; the frames n,n+1024,n+2048,n+3096,...
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; the frames n,n+1024,n+2048,n+3072,...
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; The first bit of each entry is Terminate bit, 1 = the frame is empty.
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; The first bit of each entry is Terminate bit, 1 = the frame is empty.
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; The second bit of each entry is QH/TD select bit, 1 = the entry points to
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; The second bit of each entry is QH/TD select bit, 1 = the entry points to
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; QH, 0 = to TD.
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; QH, 0 = to TD.
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; With masked 2 lower bits, the entry is a physical address of the first QH/TD
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; With masked 2 lower bits, the entry is a physical address of the first QH/TD
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; to be executed.
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; to be executed.