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/* $OpenBSD: mainbus.c,v 1.2 2009/03/01 21:39:59 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/extent.h>
#include <uvm/uvm_extern.h>
#include <machine/bus.h>
#include <machine/autoconf.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 mvme68k_bus_space_tag mainbus_bustag = {
mainbus_map,
mainbus_unmap,
mainbus_subregion,
mainbus_vaddr
};
extern struct extent *iomap_extent;
extern struct vm_map *iomap_map;
/*
* Internal IO space (iiomapsize).
*
* Internal IO space is mapped in the kernel from ``intiobase'' to
* ``intiolimit'' (defined in locore.s). Since it is always mapped,
* conversion between physical and kernel virtual addresses is easy.
*/
#if 0 /* in <machine/cpu.h> for now */
#define ISIIOVA(va) \
((va) >= intiobase && (va) < intiolimit)
#define IIOV(pa) ((pa) - iiomapbase + intiobase)
#define IIOP(va) ((va) - intiobase + iiomapbase)
#define IIOPOFF(pa) ((pa) - iiomapbase)
#endif
#define ISIIOPA(pa) ((uint)IIOPOFF(pa) < ptoa(iiomapsize))
int
mainbus_map(bus_addr_t addr, bus_size_t size, int flags,
bus_space_handle_t *ret)
{
if (ISIIOPA(addr)) {
*ret = (bus_space_handle_t)IIOV(addr);
return (0);
} else
return (ENOMEM);
}
void
mainbus_unmap(bus_space_handle_t handle, bus_size_t size)
{
}
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 != (paddr_t)-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_paddr = cf->cf_loc[0];
oca.ca_vaddr = (vaddr_t)-1; /* XXX until it dies */
oca.ca_ipl = -1;
oca.ca_bustype = BUS_MAIN;
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;
{
printf("\n");
/* 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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