/* $NetBSD: obio.c,v 1.74 2013/03/24 17:50:26 jdc 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. * * 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 1.74 2013/03/24 17:50:26 jdc Exp $"); #include "locators.h" #ifdef _KERNEL_OPT #include "sbus.h" #endif #include #include #include #include #ifdef DEBUG #include #include #endif #include #include #if NSBUS > 0 #include #endif #include #include #include #include #include #include #include struct obio4_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 */ }; union obio_softc { struct obio4_softc sc_obio; /* sun4 obio */ #if NSBUS > 0 struct sbus_softc sc_sbus; /* sun4m obio is another sbus slot */ #endif }; /* autoconfiguration driver */ static int obiomatch(device_t, cfdata_t, void *); static void obioattach(device_t, device_t, void *); CFATTACH_DECL_NEW(obio, sizeof(union obio_softc), obiomatch, obioattach, NULL, NULL); static int obio_attached; /* * 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(void *, const char *); static int obiosearch(device_t, struct cfdata *, const int *, void *); static paddr_t obio_bus_mmap(bus_space_tag_t, bus_addr_t, off_t, int, int); static int _obio_bus_map(bus_space_tag_t, bus_addr_t, bus_size_t, int, vaddr_t, bus_space_handle_t *); /* There's at most one obio bus, so we can allocate the bus tag statically */ static struct sparc_bus_space_tag obio_space_tag; #endif #if NSBUS > 0 /* * 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 }; #endif static int obiomatch(device_t parent, struct cfdata *cf, void *aux) { struct mainbus_attach_args *ma = aux; if (obio_attached) return 0; return (strcmp(cf->cf_name, ma->ma_name) == 0); } static void obioattach(device_t parent, device_t self, void *aux) { struct mainbus_attach_args *ma = aux; obio_attached = 1; printf("\n"); if (CPU_ISSUN4) { #if defined(SUN4) union obio_softc *usc = device_private(self); struct obio4_softc *sc = &usc->sc_obio; struct obio4_busattachargs oa; const char *const *cpp; static const char *const special4[] = { /* find these first */ "timer", "dma", /* need this before `esp', if any */ NULL }; sc->sc_dev = self; sc->sc_bustag = ma->ma_bustag; sc->sc_dmatag = ma->ma_dmatag; memcpy(&obio_space_tag, sc->sc_bustag, sizeof(obio_space_tag)); obio_space_tag.cookie = sc; obio_space_tag.parent = sc->sc_bustag; obio_space_tag.sparc_bus_map = _obio_bus_map; obio_space_tag.sparc_bus_mmap = obio_bus_mmap; oa.ma = ma; /* Find all `early' obio devices */ for (cpp = special4; *cpp != NULL; cpp++) { oa.name = *cpp; config_search_ia(obiosearch, self, "obio", &oa); } /* Find all other obio devices */ oa.name = NULL; config_search_ia(obiosearch, self, "obio", &oa); #endif return; } else if (CPU_ISSUN4M) { #if NSBUS > 0 /* * Attach the on-board I/O bus at on a sun4m. * In this case we treat the obio bus as another sbus slot. */ union obio_softc *usc = device_private(self); struct sbus_softc *sc = &usc->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_dev = self; 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, special4m); #endif } else { printf("obio on this machine?\n"); } } #if defined(SUN4) static int obioprint(void *args, const char *busname) { union obio_attach_args *uoba = args; struct obio4_attach_args *oba = &uoba->uoba_oba4; aprint_normal(" addr 0x%lx", (u_long)BUS_ADDR_PADDR(oba->oba_paddr)); if (oba->oba_pri != -1) aprint_normal(" level %d", oba->oba_pri); return (UNCONF); } static int _obio_bus_map(bus_space_tag_t t, bus_addr_t ba, bus_size_t size, int flags, vaddr_t va, bus_space_handle_t *hp) { if ((flags & OBIO_BUS_MAP_USE_ROM) != 0 && obio_find_rom_map(ba, size, hp) == 0) return (0); return (bus_space_map2(t->parent, ba, size, flags, va, hp)); } static paddr_t obio_bus_mmap(bus_space_tag_t t, bus_addr_t ba, off_t off, int prot, int flags) { return (bus_space_mmap(t->parent, ba, off, prot, flags)); } static int obiosearch(device_t parent, struct cfdata *cf, const int *ldesc, void *aux) { struct obio4_busattachargs *oap = aux; union obio_attach_args uoba; struct obio4_attach_args *oba = &uoba.uoba_oba4; int addr; /* Check whether we're looking for a specifically named device */ if (oap->name != NULL && strcmp(oap->name, cf->cf_name) != 0) return (0); /* * Avoid sun4m entries which don't have valid PAs. * no point in even probing them. */ addr = cf->cf_loc[OBIOCF_ADDR]; if (addr == -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 && (addr & 0xf0000000)) return (0); if (cpuinfo.cpu_type != CPUTYP_4_100 && !(addr & 0xf0000000)) return (0); uoba.uoba_isobio4 = 1; oba->oba_bustag = &obio_space_tag; oba->oba_dmatag = oap->ma->ma_dmatag; oba->oba_paddr = BUS_ADDR(PMAP_OBIO, addr); oba->oba_pri = cf->cf_loc[OBIOCF_LEVEL]; if (config_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(bus_addr_t ba, int len, bus_space_handle_t *hp) { #define getpte(va) lda(va, ASI_PTE) u_long pa, pf; int pgtype; u_long va, pte; if (len > PAGE_SIZE) return (EINVAL); pa = BUS_ADDR_PADDR(ba); pf = pa >> PGSHIFT; pgtype = PMAP_T2PTE_4(PMAP_OBIO); for (va = OLDMON_STARTVADDR; va < OLDMON_ENDVADDR; va += PAGE_SIZE) { 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 | (pa & PGOFSET)); return (0); } return (ENOENT); } #endif /* SUN4 */