NetBSD-5.0.2/sys/arch/sun2/sun2/mbmem.c
/* $NetBSD: mbmem.c,v 1.19 2008/07/06 13:29:50 tsutsui Exp $ */
/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Adam Glass, Gordon W. Ross, and Matthew Fredette.
*
* 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: mbmem.c,v 1.19 2008/07/06 13:29:50 tsutsui Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <uvm/uvm_extern.h>
#define _SUN68K_BUS_DMA_PRIVATE
#include <machine/autoconf.h>
#include <machine/pmap.h>
#include <machine/dvma.h>
#include <sun2/sun2/control.h>
#include <sun2/sun2/machdep.h>
#include <sun2/sun2/mbmem.h>
/* Does this machine have a Multibus? */
extern int cpu_has_multibus;
static int mbmem_match(device_t, cfdata_t, void *);
static void mbmem_attach(device_t, device_t, void *);
struct mbmem_softc {
device_t sc_dev; /* base device */
bus_space_tag_t sc_bustag; /* parent bus tag */
bus_dma_tag_t sc_dmatag; /* parent bus dma tag */
};
CFATTACH_DECL_NEW(mbmem, sizeof(struct mbmem_softc),
mbmem_match, mbmem_attach, NULL, NULL);
static int mbmem_attached;
static paddr_t mbmem_bus_mmap(bus_space_tag_t, bus_type_t, bus_addr_t, off_t,
int, int);
static int _mbmem_bus_map(bus_space_tag_t, bus_type_t, bus_addr_t, bus_size_t,
int, vaddr_t, bus_space_handle_t *);
static int mbmem_dmamap_load(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t,
struct proc *, int);
static int mbmem_dmamap_load_raw(bus_dma_tag_t, bus_dmamap_t,
bus_dma_segment_t *, int, bus_size_t, int);
static struct sun68k_bus_space_tag mbmem_space_tag = {
NULL, /* cookie */
NULL, /* parent bus tag */
_mbmem_bus_map, /* bus_space_map */
NULL, /* bus_space_unmap */
NULL, /* bus_space_subregion */
NULL, /* bus_space_barrier */
mbmem_bus_mmap, /* bus_space_mmap */
NULL, /* bus_intr_establish */
NULL, /* bus_space_peek_N */
NULL /* bus_space_poke_N */
};
static struct sun68k_bus_dma_tag mbmem_dma_tag;
static int
mbmem_match(device_t parent, cfdata_t cf, void *aux)
{
struct mainbus_attach_args *ma = aux;
if (mbmem_attached)
return 0;
return cpu_has_multibus &&
(ma->ma_name == NULL || strcmp(cf->cf_name, ma->ma_name) == 0);
}
static void
mbmem_attach(device_t parent, device_t self, void *aux)
{
struct mainbus_attach_args *ma = aux;
struct mbmem_softc *sc = device_private(self);
struct mbmem_attach_args mbma;
const char *const *cpp;
static const char *const special[] = {
/* find these first */
NULL
};
mbmem_attached = 1;
sc->sc_dev = self;
aprint_normal("\n");
sc->sc_bustag = ma->ma_bustag;
sc->sc_dmatag = ma->ma_dmatag;
mbmem_space_tag.cookie = sc;
mbmem_space_tag.parent = sc->sc_bustag;
mbmem_dma_tag = *sc->sc_dmatag;
mbmem_dma_tag._cookie = sc;
mbmem_dma_tag._dmamap_load = mbmem_dmamap_load;
mbmem_dma_tag._dmamap_load_raw = mbmem_dmamap_load_raw;
/*
* Prepare the skeleton attach arguments for our devices.
* The values we give in the locators are indications to
* sun68k_bus_search about which locators must and must not
* be defined.
*/
mbma = *ma;
mbma.mbma_bustag = &mbmem_space_tag;
mbma.mbma_dmatag = &mbmem_dma_tag;
mbma.mbma_paddr = LOCATOR_REQUIRED;
mbma.mbma_pri = LOCATOR_OPTIONAL;
/* Find all `early' mbmem devices */
for (cpp = special; *cpp != NULL; cpp++) {
mbma.mbma_name = *cpp;
config_search_ia(sun68k_bus_search, self, "mbmem", &mbma);
}
/* Find all other mbmem devices */
mbma.mbma_name = NULL;
config_search_ia(sun68k_bus_search, self, "mbmem", &mbma);
}
int
_mbmem_bus_map(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 mbmem_softc *sc = t->cookie;
if ((paddr + size) > MBMEM_SIZE)
panic("%s: out of range", __func__);
return bus_space_map2(sc->sc_bustag, PMAP_MBMEM, paddr,
size, flags, vaddr, hp);
}
paddr_t
mbmem_bus_mmap(bus_space_tag_t t, bus_type_t btype, bus_addr_t paddr, off_t off,
int prot, int flags)
{
struct mbmem_softc *sc = t->cookie;
return bus_space_mmap2(sc->sc_bustag, PMAP_MBMEM, paddr, off,
prot, flags);
}
static int
mbmem_dmamap_load(bus_dma_tag_t t, bus_dmamap_t map, void *buf,
bus_size_t buflen, struct proc *p, int flags)
{
int error;
error = _bus_dmamap_load(t, map, buf, buflen, p, flags);
if (error == 0)
map->dm_segs[0].ds_addr &= DVMA_MBMEM_SLAVE_MASK;
return error;
}
static int
mbmem_dmamap_load_raw(bus_dma_tag_t t, bus_dmamap_t map,
bus_dma_segment_t *segs, int nsegs, bus_size_t size, int flags)
{
int error;
error = _bus_dmamap_load_raw(t, map, segs, nsegs, size, flags);
if (error == 0)
map->dm_segs[0].ds_addr &= DVMA_MBMEM_SLAVE_MASK;
return error;
}