/* $NetBSD: obio.c,v 1.19 2016/07/07 06:55:39 msaitoh Exp $ */ /*- * Copyright (c) 1996 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Adam Glass, Gordon W. Ross, and Matthew Fredette. * * 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. */ #include __KERNEL_RCSID(0, "$NetBSD: obio.c,v 1.19 2016/07/07 06:55:39 msaitoh Exp $"); #include #include #include #include #include #include #include #include #include /* Does this machine have a Multibus? */ extern int cpu_has_multibus; static int obio_match(device_t, cfdata_t, void *); static void obio_attach(device_t, device_t, void *); struct obio_softc { device_t sc_dev; /* base device */ bus_space_tag_t sc_bustag; /* parent bus tag */ bus_dma_tag_t sc_dmatag; /* parent bus dma tag */ }; CFATTACH_DECL_NEW(obio, sizeof(struct obio_softc), obio_match, obio_attach, NULL, NULL); static int obio_attached; static paddr_t obio_bus_mmap(bus_space_tag_t, bus_type_t, bus_addr_t, off_t, int, int); static int _obio_bus_map(bus_space_tag_t, bus_type_t, bus_addr_t, bus_size_t, int, vaddr_t, bus_space_handle_t *); static int _obio_addr_bad(bus_space_tag_t, bus_space_handle_t, bus_size_t, size_t); static int _obio_bus_peek(bus_space_tag_t, bus_space_handle_t, bus_size_t, size_t, void *); static int _obio_bus_poke(bus_space_tag_t, bus_space_handle_t, bus_size_t, size_t, uint32_t); static struct sun68k_bus_space_tag obio_space_tag = { NULL, /* cookie */ NULL, /* parent bus tag */ _obio_bus_map, /* bus_space_map */ NULL, /* bus_space_unmap */ NULL, /* bus_space_subregion */ NULL, /* bus_space_barrier */ obio_bus_mmap, /* bus_space_mmap */ NULL, /* bus_intr_establish */ _obio_bus_peek, /* bus_space_peek_N */ _obio_bus_poke /* bus_space_poke_N */ }; static int obio_match(device_t parent, cfdata_t cf, void *aux) { struct mainbus_attach_args *ma = aux; if (obio_attached) return 0; return ma->ma_name == NULL || strcmp(cf->cf_name, ma->ma_name) == 0; } static void obio_attach(device_t parent, device_t self, void *aux) { struct mainbus_attach_args *ma = aux; struct obio_softc *sc = device_private(self); struct obio_attach_args oba; const char *const *cpp; static const char *const special[] = { /* find these first */ NULL }; obio_attached = 1; sc->sc_dev = self; aprint_normal("\n"); sc->sc_bustag = ma->ma_bustag; sc->sc_dmatag = ma->ma_dmatag; obio_space_tag.cookie = sc; obio_space_tag.parent = sc->sc_bustag; /* * Prepare the skeleton attach arguments for our devices. * The values we give in the locators are indications to * sun68k_bus_search about which locators must and must not * be defined. */ oba = *ma; oba.oba_bustag = &obio_space_tag; oba.oba_paddr = LOCATOR_REQUIRED; oba.oba_pri = LOCATOR_OPTIONAL; /* Find all `early' obio devices */ for (cpp = special; *cpp != NULL; cpp++) { oba.oba_name = *cpp; config_search_ia(sun68k_bus_search, self, "obio", &oba); } /* Find all other obio devices */ oba.oba_name = NULL; config_search_ia(sun68k_bus_search, self, "obio", &oba); } int _obio_bus_map(bus_space_tag_t t, bus_type_t btype, bus_addr_t paddr, bus_size_t size, int flags, vaddr_t vaddr, bus_space_handle_t *hp) { struct obio_softc *sc = t->cookie; return bus_space_map2(sc->sc_bustag, PMAP_OBIO, paddr, size, flags | _SUN68K_BUS_MAP_USE_PROM, vaddr, hp); } paddr_t obio_bus_mmap(bus_space_tag_t t, bus_type_t btype, bus_addr_t paddr, off_t off, int prot, int flags) { struct obio_softc *sc = t->cookie; return bus_space_mmap2(sc->sc_bustag, PMAP_OBIO, paddr, off, prot, flags); } /* * The sun2 obio bus doesn't give bus errors, so we check on * probed obio physical addresses to make sure they're ok. */ int _obio_addr_bad(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o, size_t s) { u_int pte; paddr_t pa; /* Get the physical address for this page. */ pte = get_pte((vaddr_t) (h + o)); if ((pte & PG_VALID) == 0) return -1; pa = PG_PA(pte); /* * Return nonzero if it's bad. All sun2 Multibus * machines have all obio devices between 0x2000 * and 0x4000, and all sun2 VME machines have all * obio devices outside of this range. */ return (!!cpu_has_multibus) != (pa >= 0x2000 && pa < 0x4000); } int _obio_bus_peek(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o, size_t s, void *vp) { struct obio_softc *sc = t->cookie; return _obio_addr_bad(t, h, o, s) || _bus_space_peek(sc->sc_bustag, h, o, s, vp); } int _obio_bus_poke(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o, size_t s, uint32_t v) { struct obio_softc *sc = t->cookie; return _obio_addr_bad(t, h, o, s) || _bus_space_poke(sc->sc_bustag, h, o, s, v); }