/* $NetBSD: obio.c,v 1.46 1999/06/28 22:40:15 pk Exp $ */ /*- * Copyright (c) 1997,1998 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Paul Kranenburg. * * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * 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 #include #include #include #ifdef DEBUG #include #include #endif #include #include #include #include #include #include #include #include #include #include #include struct obio4_softc { struct device sc_dev; /* base device */ bus_space_tag_t sc_bustag; /* parent bus tag */ bus_dma_tag_t sc_dmatag; /* parent bus dma tag */ }; union obio_softc { struct device sc_dev; /* base device */ struct obio4_softc sc_obio; /* sun4 obio */ struct sbus_softc sc_sbus; /* sun4m obio is another sbus slot */ }; /* autoconfiguration driver */ static int obiomatch __P((struct device *, struct cfdata *, void *)); static void obioattach __P((struct device *, struct device *, void *)); struct cfattach obio_ca = { sizeof(union obio_softc), obiomatch, obioattach }; /* * This `obio4_busattachargs' data structure only exists to pass down * to obiosearch() the name of a device that must be configured early. */ struct obio4_busattachargs { struct mainbus_attach_args *ma; const char *name; }; #if defined(SUN4) static int obioprint __P((void *, const char *)); static int obiosearch __P((struct device *, struct cfdata *, void *)); static int obio_bus_mmap __P((bus_space_tag_t, bus_type_t, bus_addr_t, int, bus_space_handle_t *)); static int _obio_bus_map __P((bus_space_tag_t, bus_type_t, bus_addr_t, bus_size_t, int, vaddr_t, bus_space_handle_t *)); static struct sparc_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 */ }; #endif /* * Translate obio `interrupts' property value to processor IPL (see sbus.c) * Apparently, the `interrupts' property on obio devices is just * the processor IPL. */ static int intr_obio2ipl[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 }; int obiomatch(parent, cf, aux) struct device *parent; struct cfdata *cf; void *aux; { struct mainbus_attach_args *ma = aux; return (strcmp(cf->cf_driver->cd_name, ma->ma_name) == 0); } void obioattach(parent, self, aux) struct device *parent, *self; void *aux; { struct mainbus_attach_args *ma = aux; /* * There is only one obio bus */ if (self->dv_unit > 0) { printf(" unsupported\n"); return; } printf("\n"); if (CPU_ISSUN4) { #if defined(SUN4) struct obio4_softc *sc = &((union obio_softc *)self)->sc_obio; struct obio4_busattachargs oa; const char *const *cpp; static const char *const special4[] = { /* find these first */ "timer", NULL }; sc->sc_bustag = ma->ma_bustag; sc->sc_dmatag = ma->ma_dmatag; obio_space_tag.cookie = sc; obio_space_tag.parent = sc->sc_bustag; oa.ma = ma; /* Find all `early' obio devices */ for (cpp = special4; *cpp != NULL; cpp++) { oa.name = *cpp; (void)config_search(obiosearch, self, &oa); } /* Find all other obio devices */ oa.name = NULL; (void)config_search(obiosearch, self, &oa); #endif return; } else if (CPU_ISSUN4M) { /* * Attach the on-board I/O bus at on a sun4m. * In this case we treat the obio bus as another sbus slot. */ struct sbus_softc *sc = &((union obio_softc *)self)->sc_sbus; static const char *const special4m[] = { /* find these first */ "eeprom", "counter", #if 0 /* Not all sun4m's have an `auxio' */ "auxio", #endif "", /* place device to ignore here */ "interrupt", NULL }; sc->sc_bustag = ma->ma_bustag; sc->sc_dmatag = ma->ma_dmatag; sc->sc_intr2ipl = intr_obio2ipl; sbus_attach_common(sc, "obio", ma->ma_node, ma->ma_bp, special4m); } else { printf("obio on this machine?\n"); } } #if defined(SUN4) int obioprint(args, busname) void *args; const char *busname; { union obio_attach_args *uoba = args; struct obio4_attach_args *oba = &uoba->uoba_oba4; printf(" addr 0x%lx", (long)oba->oba_paddr); if (oba->oba_pri != -1) printf(" level %d", oba->oba_pri); return (UNCONF); } int _obio_bus_map(t, btype, paddr, size, flags, vaddr, hp) 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 obio4_softc *sc = t->cookie; if ((flags & OBIO_BUS_MAP_USE_ROM) != 0 && obio_find_rom_map(paddr, PMAP_OBIO, size, hp) == 0) return (0); return (bus_space_map2(sc->sc_bustag, PMAP_OBIO, paddr, size, flags, vaddr, hp)); } int obio_bus_mmap(t, btype, paddr, flags, hp) bus_space_tag_t t; bus_type_t btype; bus_addr_t paddr; int flags; bus_space_handle_t *hp; { struct obio4_softc *sc = t->cookie; return (bus_space_mmap(sc->sc_bustag, PMAP_OBIO, paddr, flags, hp)); } int obiosearch(parent, cf, aux) struct device *parent; struct cfdata *cf; void *aux; { struct obio4_busattachargs *oap = aux; union obio_attach_args uoba; struct obio4_attach_args *oba = &uoba.uoba_oba4; struct bootpath *bp; /* Check whether we're looking for a specifically named device */ if (oap->name != NULL && strcmp(oap->name, cf->cf_driver->cd_name) != 0) return (0); /* * Avoid sun4m entries which don't have valid PAs. * no point in even probing them. */ if (cf->cf_loc[0] == -1) return (0); /* * On the 4/100 obio addresses must be mapped at * 0x0YYYYYYY, but alias higher up (we avoid the * alias condition because it causes pmap difficulties) * XXX: We also assume that 4/[23]00 obio addresses * must be 0xZYYYYYYY, where (Z != 0) */ if (cpuinfo.cpu_type == CPUTYP_4_100 && (cf->cf_loc[0] & 0xf0000000)) return (0); if (cpuinfo.cpu_type != CPUTYP_4_100 && !(cf->cf_loc[0] & 0xf0000000)) return (0); uoba.uoba_isobio4 = 1; oba->oba_bustag = &obio_space_tag; oba->oba_dmatag = oap->ma->ma_dmatag; oba->oba_paddr = cf->cf_loc[0]; oba->oba_pri = cf->cf_loc[1]; bp = oap->ma->ma_bp; if (bp != NULL && strcmp(bp->name, "obio") == 0) oba->oba_bp = bp + 1; else oba->oba_bp = NULL; if ((*cf->cf_attach->ca_match)(parent, cf, &uoba) == 0) return (0); config_attach(parent, cf, &uoba, obioprint); return (1); } /* * If we can find a mapping that was established by the rom, use it. * Else, create a new mapping. */ int obio_find_rom_map(pa, iospace, len, hp) bus_addr_t pa; bus_type_t iospace; int len; bus_space_handle_t *hp; { #define getpte(va) lda(va, ASI_PTE) u_long pf; int pgtype; u_long va, pte; if (len > NBPG) return (EINVAL); pf = pa >> PGSHIFT; pgtype = PMAP_T2PTE_4(iospace); for (va = OLDMON_STARTVADDR; va < OLDMON_ENDVADDR; va += NBPG) { pte = getpte(va); if ((pte & PG_V) == 0 || (pte & PG_TYPE) != pgtype || (pte & PG_PFNUM) != pf) continue; /* * Found entry in PROM's pagetable * note: preserve page offset */ *hp = (bus_space_handle_t)(va | ((u_long)pa & PGOFSET)); return (0); } return (ENOENT); } #endif /* SUN4 */