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/* $OpenBSD: mainbus.c,v 1.12 2004/05/07 18:10:28 miod Exp $ */
/*
* Copyright (c) 1998 Steve Murphree, Jr.
* Copyright (c) 2004, Miodrag Vallat.
*
* 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 AUTHOR ``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 AUTHOR 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/reboot.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/disklabel.h>
#include <machine/bus.h>
#include <machine/autoconf.h>
#include <machine/board.h>
#include <machine/cmmu.h>
#include <machine/cpu.h>
void mainbus_attach(struct device *, struct device *, void *);
int mainbus_match(struct device *, void *, void *);
int mainbus_print(void *, const char *);
int mainbus_scan(struct device *, void *, void *);
/*
* bus_space routines for 1:1 obio mappings
*/
int mainbus_map(bus_addr_t, bus_size_t, int, bus_space_handle_t *);
void mainbus_unmap(bus_space_handle_t, bus_size_t);
int mainbus_subregion(bus_space_handle_t, bus_size_t, bus_size_t,
bus_space_handle_t *);
void *mainbus_vaddr(bus_space_handle_t);
const struct mvme88k_bus_space_tag mainbus_bustag = {
mainbus_map,
mainbus_unmap,
mainbus_subregion,
mainbus_vaddr
};
/*
* Obio (internal IO) space is mapped 1:1 (see pmap_bootstrap() for details).
*
* However, sram attaches as a child of mainbus, but does not reside in
* internal IO space. As a result, we have to allow both 1:1 and iomap
* translations, depending upon the address to map.
*/
int
mainbus_map(bus_addr_t addr, bus_size_t size, int flags,
bus_space_handle_t *ret)
{
vaddr_t map;
static bus_addr_t threshold = 0;
if (threshold == 0) {
switch (brdtyp) {
#ifdef MVME188
case BRD_188:
threshold = MVME188_UTILITY;
break;
#endif
#ifdef MVME187
case BRD_187:
case BRD_8120:
#endif
#ifdef MVME197
case BRD_197:
#endif
threshold = OBIO_START;
break;
}
}
if (addr >= threshold)
map = (vaddr_t)addr;
else {
#if 0
map = iomap_mapin(addr, size, 0);
#else
map = (vaddr_t)mapiodev((void *)addr, size);
#endif
}
if (map == NULL)
return ENOMEM;
*ret = (bus_space_handle_t)map;
return 0;
}
void
mainbus_unmap(bus_space_handle_t handle, bus_size_t size)
{
/* XXX what to do for non-obio mappings? */
}
int
mainbus_subregion(bus_space_handle_t handle, bus_addr_t offset,
bus_size_t size, bus_space_handle_t *ret)
{
*ret = handle + offset;
return (0);
}
void *
mainbus_vaddr(bus_space_handle_t handle)
{
return (void *)handle;
}
/*
* Configuration glue
*/
struct cfattach mainbus_ca = {
sizeof(struct device), mainbus_match, mainbus_attach
};
struct cfdriver mainbus_cd = {
NULL, "mainbus", DV_DULL
};
int
mainbus_match(parent, cf, args)
struct device *parent;
void *cf;
void *args;
{
return (1);
}
int
mainbus_print(args, bus)
void *args;
const char *bus;
{
struct confargs *ca = args;
if (ca->ca_paddr != -1)
printf(" addr 0x%x", ca->ca_paddr);
return (UNCONF);
}
int
mainbus_scan(parent, child, args)
struct device *parent;
void *child, *args;
{
struct cfdata *cf = child;
struct confargs oca;
bzero(&oca, sizeof oca);
oca.ca_iot = &mainbus_bustag;
oca.ca_dmat = 0; /* XXX no need for a meaningful value yet */
oca.ca_bustype = BUS_MAIN;
oca.ca_paddr = cf->cf_loc[0];
oca.ca_ipl = -1;
oca.ca_name = cf->cf_driver->cd_name;
if ((*cf->cf_attach->ca_match)(parent, cf, &oca) == 0)
return (0);
config_attach(parent, cf, &oca, mainbus_print);
return (1);
}
void
mainbus_attach(parent, self, args)
struct device *parent, *self;
void *args;
{
extern char cpu_model[];
printf(": %s\n", cpu_model);
/*
* Display cpu/mmu details. Only for the master CPU so far.
*/
cpu_configuration_print(1);
/* XXX
* should have a please-attach-first list for mainbus,
* to ensure that the pcc/vme2/mcc chips are attached
* first.
*/
(void)config_search(mainbus_scan, self, args);
}
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