HelenOS sources

XHCI_OP_CRR       248 uspace/drv/bus/usb/xhci/commands.c 	while (XHCI_REG_RD(hc->op_regs, XHCI_OP_CRR))
XHCI_OP_CRR       673 uspace/drv/bus/usb/xhci/commands.c 	if (XHCI_REG_RD(hc->op_regs, XHCI_OP_CRR)) {
XHCI_OP_CRR       177 uspace/drv/bus/usb/xhci/debug.c 	DUMP_REG(hc->op_regs, XHCI_OP_CRR);
HelenOS homepage, sources at GitHub