/*      $NetBSD: neptune.c,v 1.23 2021/08/07 16:19:07 thorpej Exp $     */

/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Minoura Makoto.
*
* 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.
*/

/*
* Neptune-X -- X68k-ISA Bus Bridge
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: neptune.c,v 1.23 2021/08/07 16:19:07 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/malloc.h>

#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/frame.h>

#include <arch/x68k/dev/intiovar.h>
#include <arch/x68k/dev/neptunevar.h>

/* bus_space stuff */
static int neptune_bus_space_map(bus_space_tag_t, bus_addr_t, bus_size_t,
       int, bus_space_handle_t *);
static void neptune_bus_space_unmap(bus_space_tag_t, bus_space_handle_t,
       bus_size_t);
static int neptune_bus_space_subregion(bus_space_tag_t, bus_space_handle_t,
       bus_size_t, bus_size_t, bus_space_handle_t *);

static struct x68k_bus_space neptune_bus = {
#if 0
       X68K_NEPUTUNE_BUS,
#endif
       neptune_bus_space_map, neptune_bus_space_unmap,
       neptune_bus_space_subregion,
       x68k_bus_space_alloc, x68k_bus_space_free,
};


static int neptune_match(device_t, cfdata_t, void *);
static void neptune_attach(device_t, device_t, void *);
static int neptune_search(device_t, cfdata_t, const int *, void *);
static int neptune_print(void *, const char *);

CFATTACH_DECL_NEW(neptune, sizeof(struct neptune_softc),
   neptune_match, neptune_attach, NULL, NULL);

static int
neptune_match(device_t parent, cfdata_t cf, void *aux)
{
       struct intio_attach_args *ia = aux;

       if (strcmp(ia->ia_name, "neptune") != 0)
               return 0;

       ia->ia_size = 0x400;
       if (intio_map_allocate_region(parent, ia, INTIO_MAP_TESTONLY))
               return 0;

       /* Neptune is a virtual device.  Always there. */

       return (1);
}


static void
neptune_attach(device_t parent, device_t self, void *aux)
{
       struct neptune_softc *sc = device_private(self);
       struct intio_attach_args *ia = aux;
       struct neptune_attach_args na;
       int r __diagused;
       cfdata_t cf;

       ia->ia_size = 0x400;
       r = intio_map_allocate_region(parent, ia, INTIO_MAP_ALLOCATE);
#ifdef DIAGNOSTIC
       if (r)
               panic("IO map for Neptune corruption??");
#endif

       sc->sc_bst = malloc(sizeof(struct x68k_bus_space), M_DEVBUF, M_WAITOK);
       *sc->sc_bst = neptune_bus;
       sc->sc_bst->x68k_bus_device = self;

       sc->sc_addr = (vaddr_t)IIOV(ia->ia_addr);

       na.na_bst = sc->sc_bst;
       na.na_intr = ia->ia_intr;

       cf = config_search(self, &na,
           CFARGS(.submatch = neptune_search));
       if (cf) {
               aprint_normal(": Neptune-X ISA bridge\n");
               config_attach(self, cf, &na, neptune_print, CFARGS_NONE);
       } else {
               aprint_normal(": no device found.\n");
               intio_map_free_region(parent, ia);
       }
}

static int
neptune_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
{
       struct neptune_attach_args *na = aux;

       na->na_addr = cf->neptune_cf_addr;

       return config_match(parent, cf, na);
}

static int
neptune_print(void *aux, const char *name)
{
       struct neptune_attach_args *na = aux;

/*      if (na->na_addr > 0)    */
               aprint_normal(" addr 0x%06x", na->na_addr);

       return (QUIET);
}


/*
* neptune bus space stuff.
*/
static int
neptune_bus_space_map(bus_space_tag_t t, bus_addr_t bpa, bus_size_t size,
   int flags, bus_space_handle_t *bshp)
{
       struct neptune_softc *sc = device_private(t->x68k_bus_device);
       vaddr_t start = sc->sc_addr;

       /*
        * Neptune bus is mapped permanently.
        */
       *bshp = (bus_space_handle_t) ((u_int)start + ((u_int)bpa - 0x200) * 2);

       if (badaddr((void *)*bshp)) {
               return 1;
       }

       *bshp |= 0x80000000;    /* higher byte (= even address) only */

       return (0);
}

static void
neptune_bus_space_unmap(bus_space_tag_t t, bus_space_handle_t bsh,
   bus_size_t size)
{
       return;
}

static int
neptune_bus_space_subregion(bus_space_tag_t t, bus_space_handle_t bsh,
   bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp)
{

       *nbshp = bsh + offset*2;
       return (0);
}

You are viewing proxied material from ftp.icm.edu.pl. The copyright of proxied material belongs to its original authors. Any comments or complaints in relation to proxied material should be directed to the original authors of the content concerned. Please see the disclaimer for more details.