/* $NetBSD: sxvar.h,v 1.4.30.1 2023/07/05 16:09:50 martin Exp $ */ /*- * Copyright (c) 2013 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Michael Lorenz. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #ifndef SXVAR_H #define SXVAR_H #include struct sx_softc { device_t sc_dev; bus_addr_t sc_uregs; bus_space_tag_t sc_tag; bus_space_handle_t sc_regh; int sc_cnt; }; static inline void sx_write(struct sx_softc *sc, int addr, uint32_t val) { bus_space_write_4(sc->sc_tag, sc->sc_regh, addr, val); } static inline uint32_t sx_read(struct sx_softc *sc, int addr) { return bus_space_read_4(sc->sc_tag, sc->sc_regh, addr); } /* * to be used before issuing SX instructions * this will periodically allow the instruction queue to drain in order * to avoid excessive MBus relinquish & retry cycles during long SX ops * which may cause us to lose interrupts */ static inline void sx_wait(struct sx_softc *sc) { uint32_t reg; if (sc->sc_cnt > 6) { do { reg = bus_space_read_4(sc->sc_tag, sc->sc_regh, SX_CONTROL_STATUS); } while ((reg & SX_MT) == 0); sc->sc_cnt = 0; } else sc->sc_cnt++; } void sx_dump(void); #endif