347 lines
8.9 KiB
C
347 lines
8.9 KiB
C
/* $NetBSD: obio.c,v 1.49 2000/07/25 21:50:03 pk Exp $ */
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/*-
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* Copyright (c) 1997,1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Paul Kranenburg.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/malloc.h>
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#ifdef DEBUG
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#include <sys/proc.h>
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#include <sys/syslog.h>
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#endif
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#include <uvm/uvm_extern.h>
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#include <machine/bus.h>
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#include <sparc/dev/sbusvar.h>
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#include <machine/autoconf.h>
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#include <machine/oldmon.h>
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#include <machine/cpu.h>
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#include <machine/ctlreg.h>
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#include <sparc/sparc/asm.h>
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#include <sparc/sparc/vaddrs.h>
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#include <sparc/sparc/cpuvar.h>
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struct obio4_softc {
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struct device sc_dev; /* base device */
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bus_space_tag_t sc_bustag; /* parent bus tag */
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bus_dma_tag_t sc_dmatag; /* parent bus dma tag */
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};
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union obio_softc {
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struct device sc_dev; /* base device */
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struct obio4_softc sc_obio; /* sun4 obio */
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struct sbus_softc sc_sbus; /* sun4m obio is another sbus slot */
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};
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/* autoconfiguration driver */
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static int obiomatch __P((struct device *, struct cfdata *, void *));
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static void obioattach __P((struct device *, struct device *, void *));
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struct cfattach obio_ca = {
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sizeof(union obio_softc), obiomatch, obioattach
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};
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/*
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* This `obio4_busattachargs' data structure only exists to pass down
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* to obiosearch() the name of a device that must be configured early.
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*/
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struct obio4_busattachargs {
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struct mainbus_attach_args *ma;
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const char *name;
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};
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#if defined(SUN4)
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static int obioprint __P((void *, const char *));
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static int obiosearch __P((struct device *, struct cfdata *, void *));
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static int obio_bus_mmap __P((bus_space_tag_t, bus_type_t, bus_addr_t,
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int, bus_space_handle_t *));
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static int _obio_bus_map __P((bus_space_tag_t, bus_type_t, bus_addr_t,
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bus_size_t, int,
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vaddr_t, bus_space_handle_t *));
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static struct sparc_bus_space_tag obio_space_tag = {
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NULL, /* cookie */
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NULL, /* parent bus tag */
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_obio_bus_map, /* bus_space_map */
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NULL, /* bus_space_unmap */
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NULL, /* bus_space_subregion */
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NULL, /* bus_space_barrier */
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obio_bus_mmap, /* bus_space_mmap */
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NULL /* bus_intr_establish */
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};
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#endif
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/*
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* Translate obio `interrupts' property value to processor IPL (see sbus.c)
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* Apparently, the `interrupts' property on obio devices is just
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* the processor IPL.
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*/
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static int intr_obio2ipl[] = {
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
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};
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int
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obiomatch(parent, cf, aux)
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struct device *parent;
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struct cfdata *cf;
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void *aux;
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{
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struct mainbus_attach_args *ma = aux;
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return (strcmp(cf->cf_driver->cd_name, ma->ma_name) == 0);
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}
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void
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obioattach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct mainbus_attach_args *ma = aux;
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/*
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* There is only one obio bus
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*/
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if (self->dv_unit > 0) {
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printf(" unsupported\n");
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return;
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}
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printf("\n");
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if (CPU_ISSUN4) {
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#if defined(SUN4)
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struct obio4_softc *sc = &((union obio_softc *)self)->sc_obio;
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struct obio4_busattachargs oa;
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const char *const *cpp;
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static const char *const special4[] = {
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/* find these first */
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"timer",
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"dma", /* need this before `esp', if any */
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NULL
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};
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sc->sc_bustag = ma->ma_bustag;
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sc->sc_dmatag = ma->ma_dmatag;
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obio_space_tag.cookie = sc;
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obio_space_tag.parent = sc->sc_bustag;
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oa.ma = ma;
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/* Find all `early' obio devices */
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for (cpp = special4; *cpp != NULL; cpp++) {
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oa.name = *cpp;
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(void)config_search(obiosearch, self, &oa);
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}
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/* Find all other obio devices */
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oa.name = NULL;
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(void)config_search(obiosearch, self, &oa);
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#endif
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return;
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} else if (CPU_ISSUN4M) {
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/*
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* Attach the on-board I/O bus at on a sun4m.
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* In this case we treat the obio bus as another sbus slot.
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*/
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struct sbus_softc *sc = &((union obio_softc *)self)->sc_sbus;
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static const char *const special4m[] = {
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/* find these first */
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"eeprom",
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"counter",
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#if 0 /* Not all sun4m's have an `auxio' */
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"auxio",
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#endif
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"",
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/* place device to ignore here */
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"interrupt",
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NULL
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};
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sc->sc_bustag = ma->ma_bustag;
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sc->sc_dmatag = ma->ma_dmatag;
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sc->sc_intr2ipl = intr_obio2ipl;
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sbus_attach_common(sc, "obio", ma->ma_node, special4m);
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} else {
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printf("obio on this machine?\n");
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}
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}
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#if defined(SUN4)
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int
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obioprint(args, busname)
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void *args;
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const char *busname;
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{
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union obio_attach_args *uoba = args;
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struct obio4_attach_args *oba = &uoba->uoba_oba4;
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printf(" addr 0x%lx", (long)oba->oba_paddr);
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if (oba->oba_pri != -1)
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printf(" level %d", oba->oba_pri);
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return (UNCONF);
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}
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int
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_obio_bus_map(t, btype, paddr, size, flags, vaddr, hp)
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bus_space_tag_t t;
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bus_type_t btype;
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bus_addr_t paddr;
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bus_size_t size;
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int flags;
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vaddr_t vaddr;
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bus_space_handle_t *hp;
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{
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struct obio4_softc *sc = t->cookie;
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if ((flags & OBIO_BUS_MAP_USE_ROM) != 0 &&
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obio_find_rom_map(paddr, PMAP_OBIO, size, hp) == 0)
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return (0);
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return (bus_space_map2(sc->sc_bustag, PMAP_OBIO, paddr,
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size, flags, vaddr, hp));
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}
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int
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obio_bus_mmap(t, btype, paddr, flags, hp)
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bus_space_tag_t t;
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bus_type_t btype;
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bus_addr_t paddr;
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int flags;
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bus_space_handle_t *hp;
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{
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struct obio4_softc *sc = t->cookie;
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return (bus_space_mmap(sc->sc_bustag, PMAP_OBIO, paddr, flags, hp));
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}
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int
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obiosearch(parent, cf, aux)
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struct device *parent;
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struct cfdata *cf;
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void *aux;
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{
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struct obio4_busattachargs *oap = aux;
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union obio_attach_args uoba;
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struct obio4_attach_args *oba = &uoba.uoba_oba4;
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/* Check whether we're looking for a specifically named device */
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if (oap->name != NULL && strcmp(oap->name, cf->cf_driver->cd_name) != 0)
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return (0);
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/*
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* Avoid sun4m entries which don't have valid PAs.
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* no point in even probing them.
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*/
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if (cf->cf_loc[0] == -1)
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return (0);
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/*
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* On the 4/100 obio addresses must be mapped at
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* 0x0YYYYYYY, but alias higher up (we avoid the
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* alias condition because it causes pmap difficulties)
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* XXX: We also assume that 4/[23]00 obio addresses
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* must be 0xZYYYYYYY, where (Z != 0)
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*/
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if (cpuinfo.cpu_type == CPUTYP_4_100 && (cf->cf_loc[0] & 0xf0000000))
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return (0);
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if (cpuinfo.cpu_type != CPUTYP_4_100 && !(cf->cf_loc[0] & 0xf0000000))
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return (0);
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uoba.uoba_isobio4 = 1;
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oba->oba_bustag = &obio_space_tag;
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oba->oba_dmatag = oap->ma->ma_dmatag;
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oba->oba_paddr = cf->cf_loc[0];
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oba->oba_pri = cf->cf_loc[1];
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if ((*cf->cf_attach->ca_match)(parent, cf, &uoba) == 0)
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return (0);
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config_attach(parent, cf, &uoba, obioprint);
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return (1);
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}
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/*
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* If we can find a mapping that was established by the rom, use it.
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* Else, create a new mapping.
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*/
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int
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obio_find_rom_map(pa, iospace, len, hp)
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bus_addr_t pa;
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bus_type_t iospace;
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int len;
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bus_space_handle_t *hp;
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{
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#define getpte(va) lda(va, ASI_PTE)
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u_long pf;
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int pgtype;
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u_long va, pte;
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if (len > NBPG)
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return (EINVAL);
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pf = pa >> PGSHIFT;
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pgtype = PMAP_T2PTE_4(iospace);
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for (va = OLDMON_STARTVADDR; va < OLDMON_ENDVADDR; va += NBPG) {
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pte = getpte(va);
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if ((pte & PG_V) == 0 || (pte & PG_TYPE) != pgtype ||
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(pte & PG_PFNUM) != pf)
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continue;
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/*
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* Found entry in PROM's pagetable
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* note: preserve page offset
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*/
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*hp = (bus_space_handle_t)(va | ((u_long)pa & PGOFSET));
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return (0);
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}
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return (ENOENT);
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}
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#endif /* SUN4 */
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