HelenOS sources

XHCI_CAP_LENGTH    67 uspace/drv/bus/usb/xhci/debug.c 	DUMP_REG(cap, XHCI_CAP_LENGTH);
XHCI_CAP_LENGTH   211 uspace/drv/bus/usb/xhci/hc.c 	hc->op_regs  = (xhci_op_regs_t *)  (base + XHCI_REG_RD(hc->cap_regs, XHCI_CAP_LENGTH));
XHCI_CAP_LENGTH   396 uspace/drv/bus/usb/xhci/hc.c 	    XHCI_REG_RD(hc->cap_regs, XHCI_CAP_LENGTH) +
HelenOS homepage, sources at GitHub