NetBSD/sys/arch/sparc/dev/obio.c

324 lines
8.3 KiB
C

/* $NetBSD: obio.c,v 1.45 1998/09/05 22:15:51 eeh 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 <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/malloc.h>
#ifdef DEBUG
#include <sys/proc.h>
#include <sys/syslog.h>
#endif
#include <vm/vm.h>
#include <machine/bus.h>
#include <sparc/dev/sbusvar.h>
#include <machine/autoconf.h>
#include <machine/pmap.h>
#include <machine/oldmon.h>
#include <machine/cpu.h>
#include <machine/ctlreg.h>
#include <sparc/sparc/asm.h>
#include <sparc/sparc/vaddrs.h>
#include <sparc/sparc/cpuvar.h>
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
};
#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;
sc->sc_bustag = ma->ma_bustag;
sc->sc_dmatag = ma->ma_dmatag;
obio_space_tag.cookie = sc;
obio_space_tag.parent = sc->sc_bustag;
(void)config_search(obiosearch, self, aux);
#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 mainbus_attach_args *ma = aux;
union obio_attach_args uoba;
struct obio4_attach_args *oba = &uoba.uoba_oba4;
struct bootpath *bp;
/*
* 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 = ma->ma_dmatag;
oba->oba_paddr = cf->cf_loc[0];
oba->oba_pri = cf->cf_loc[1];
bp = 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 */