NetBSD-5.0.2/sys/arch/sun68k/sun68k/vme_sun68k.c
/* $NetBSD: vme_sun68k.c,v 1.14 2008/07/01 15:15:34 tsutsui Exp $ */
/*-
* Copyright (c) 1997, 1998, 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Paul Kranenburg 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: vme_sun68k.c,v 1.14 2008/07/01 15:15:34 tsutsui Exp $");
#include <sys/param.h>
#include <sys/extent.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/errno.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/syslog.h>
#include <uvm/uvm_extern.h>
#define _SUN68K_BUS_DMA_PRIVATE
#include <machine/bus.h>
#include <machine/autoconf.h>
#include <machine/pmap.h>
#include <machine/dvma.h>
#include <dev/vme/vmereg.h>
#include <dev/vme/vmevar.h>
#include <sun68k/sun68k/vme_sun68k.h>
struct sun68kvme_softc {
device_t sc_dev; /* base device */
bus_space_tag_t sc_bustag;
bus_dma_tag_t sc_dmatag;
};
struct sun68kvme_softc *sun68kvme_sc;/*XXX*/
/* autoconfiguration driver */
static int sun68kvme_match(device_t, cfdata_t, void *);
static void sun68kvme_attach(device_t, device_t, void *);
static int sun68k_vme_probe(void *, vme_addr_t, vme_size_t, vme_am_t,
vme_datasize_t,
int (*)(void *, bus_space_tag_t, bus_space_handle_t), void *);
static int sun68k_vme_map(void *, vme_addr_t, vme_size_t, vme_am_t,
vme_datasize_t, vme_swap_t, bus_space_tag_t *, bus_space_handle_t *,
vme_mapresc_t *);
static void sun68k_vme_unmap(void *, vme_mapresc_t);
static int sun68k_vme_intr_map(void *, int, int, vme_intr_handle_t *);
static const struct evcnt *sun68k_vme_intr_evcnt(void *, vme_intr_handle_t);
static void * sun68k_vme_intr_establish(void *, vme_intr_handle_t, int,
int (*)(void *), void *);
static void sun68k_vme_intr_disestablish(void *, void *);
/*
* DMA functions.
*/
static void sun68k_vct_dmamap_destroy(void *, bus_dmamap_t);
static int sun68k_vct_dmamap_create(void *, vme_size_t, vme_am_t,
vme_datasize_t, vme_swap_t, int, vme_size_t, vme_addr_t,
int, bus_dmamap_t *);
static int sun68k_vme_dmamap_load(bus_dma_tag_t, bus_dmamap_t, void *,
bus_size_t, struct proc *, int);
static int sun68k_vme_dmamap_load_raw(bus_dma_tag_t, bus_dmamap_t,
bus_dma_segment_t *, int, bus_size_t, int);
paddr_t sun68k_vme_mmap_cookie(vme_addr_t, vme_am_t, bus_space_handle_t *);
CFATTACH_DECL_NEW(sun68kvme, sizeof(struct sun68kvme_softc),
sun68kvme_match, sun68kvme_attach, NULL, NULL);
static int sun68kvme_attached;
/*
* The VME bus logic on sun68k machines maps DMA requests in the first MB
* of VME space to the last MB of DVMA space. The base bus_dma code
* in machdep.c manages DVMA space; all we must do is adjust the DMA
* addresses returned by bus_dmamap_load*() by ANDing them with
* DVMA_VME_SLAVE_MASK.
*/
struct vme_chipset_tag sun68k_vme_chipset_tag = {
NULL,
sun68k_vme_map,
sun68k_vme_unmap,
sun68k_vme_probe,
sun68k_vme_intr_map,
sun68k_vme_intr_evcnt,
sun68k_vme_intr_establish,
sun68k_vme_intr_disestablish,
sun68k_vct_dmamap_create,
sun68k_vct_dmamap_destroy
};
struct sun68k_bus_dma_tag sun68k_vme_dma_tag;
/* Does this machine have a VME bus? */
extern int cpu_has_vme;
/*
* Probe the VME bus.
*/
int
sun68kvme_match(device_t parent, cfdata_t cf, void *aux)
{
struct mainbus_attach_args *ma = aux;
if (sun68kvme_attached)
return 0;
return cpu_has_vme &&
(ma->ma_name == NULL || strcmp(cf->cf_name, ma->ma_name) == 0);
}
/*
* Attach the VME bus.
*/
void
sun68kvme_attach(device_t parent, device_t self, void *aux)
{
struct mainbus_attach_args *ma = aux;
struct sun68kvme_softc *sc = device_private(self);
struct vmebus_attach_args vba;
sun68kvme_attached = 1;
sun68kvme_sc = sc;
sc->sc_dev = self;
sc->sc_bustag = ma->ma_bustag;
sc->sc_dmatag = ma->ma_dmatag;
sun68k_vme_chipset_tag.cookie = sc;
sun68k_vme_dma_tag = *ma->ma_dmatag;
sun68k_vme_dma_tag._cookie = sc;
sun68k_vme_dma_tag._dmamap_load = sun68k_vme_dmamap_load;
sun68k_vme_dma_tag._dmamap_load_raw = sun68k_vme_dmamap_load_raw;
vba.va_vct = &sun68k_vme_chipset_tag;
vba.va_bdt = &sun68k_vme_dma_tag;
vba.va_slaveconfig = 0;
aprint_normal("\n");
(void)config_found(self, &vba, 0);
}
/*
* Probes for a device on the VME bus.
* Returns zero on success.
*/
int
sun68k_vme_probe(void *cookie, vme_addr_t addr, vme_size_t len, vme_am_t mod,
vme_datasize_t datasize,
int (*callback)(void *, bus_space_tag_t, bus_space_handle_t), void *arg)
{
struct sun68kvme_softc *sc = cookie;
bus_type_t iospace;
bus_addr_t paddr;
bus_space_handle_t handle;
bus_size_t size;
bus_size_t off, max_off;
int error;
/* Map in the space. */
error = vmebus_translate(mod, addr, &iospace, &paddr);
if (error == 0)
error = bus_space_map2(sc->sc_bustag, iospace, paddr, len,
0, 0, &handle);
if (error)
return error;
/* Probe the space. */
size = (datasize == VME_D8 ? 1 : (datasize == VME_D16 ? 2 : 4));
max_off = (callback ? size : len);
for (off = 0; off < max_off; off += size) {
error = _bus_space_peek(sc->sc_bustag, handle, off, size, NULL);
if (error)
break;
}
if (error == 0 && callback)
error = (*callback)(arg, sc->sc_bustag, handle);
/* Unmap the space. */
bus_space_unmap(sc->sc_bustag, handle, len);
return error;
}
/*
* Maps in a device on the VME bus.
*/
int
sun68k_vme_map(void *cookie, vme_addr_t addr, vme_size_t size, vme_am_t mod,
vme_datasize_t datasize, vme_swap_t swap, bus_space_tag_t *tp,
bus_space_handle_t *hp, vme_mapresc_t *rp)
{
struct sun68kvme_softc *sc = cookie;
bus_type_t iospace;
bus_addr_t paddr;
int error;
error = vmebus_translate(mod, addr, &iospace, &paddr);
if (error != 0)
return error;
*tp = sc->sc_bustag;
return bus_space_map2(sc->sc_bustag, iospace, paddr, size, 0, 0, hp);
}
/*
* Assists in mmap'ing a device on the VME bus.
*/
paddr_t
sun68k_vme_mmap_cookie(vme_addr_t addr, vme_am_t mod, bus_space_handle_t *hp)
{
struct sun68kvme_softc *sc = sun68kvme_sc;
bus_type_t iospace;
bus_addr_t paddr;
int error;
error = vmebus_translate(mod, addr, &iospace, &paddr);
if (error != 0)
return error;
return bus_space_mmap2(sc->sc_bustag, iospace, paddr, 0, 0, 0);
}
struct sun68k_vme_intr_handle {
int vec; /* VME interrupt vector */
int pri; /* VME interrupt priority */
};
/*
* This maps a VME interrupt level and vector pair into
* a data structure that can subsequently be used to
* establish an interrupt handler.
*/
int
sun68k_vme_intr_map(void *cookie, int level, int vec, vme_intr_handle_t *ihp)
{
struct sun68k_vme_intr_handle *svih;
svih = malloc(sizeof(struct sun68k_vme_intr_handle),
M_DEVBUF, M_NOWAIT);
svih->pri = level;
svih->vec = vec;
*ihp = svih;
return 0;
}
const struct evcnt *
sun68k_vme_intr_evcnt(void *cookie, vme_intr_handle_t vih)
{
/* XXX for now, no evcnt parent reported */
return NULL;
}
/*
* Establish a VME bus interrupt.
*/
void *
sun68k_vme_intr_establish(void *cookie, vme_intr_handle_t vih, int pri,
int (*func)(void *), void *arg)
{
struct sun68k_vme_intr_handle *svih =
(struct sun68k_vme_intr_handle *)vih;
/* Install interrupt handler. */
isr_add_vectored(func, arg, svih->pri, svih->vec);
return NULL;
}
void
sun68k_vme_unmap(void *cookie, vme_mapresc_t resc)
{
/* Not implemented */
panic("%s: not implemented", __func__);
}
void
sun68k_vme_intr_disestablish(void *cookie, void *a)
{
/* Not implemented */
panic("%s: not implemented", __func__);
}
/*
* VME DMA functions.
*/
static void
sun68k_vct_dmamap_destroy(void *cookie, bus_dmamap_t map)
{
struct sun68kvme_softc *sc = cookie;
bus_dmamap_destroy(sc->sc_dmatag, map);
}
static int
sun68k_vct_dmamap_create(void *cookie, vme_size_t size, vme_am_t am,
vme_datasize_t datasize, vme_swap_t swap, int nsegments,
vme_size_t maxsegsz, vme_addr_t boundary, int flags, bus_dmamap_t *dmamp)
{
struct sun68kvme_softc *sc = cookie;
/* Allocate a base map through parent bus ops */
return bus_dmamap_create(sc->sc_dmatag, size, nsegments, maxsegsz,
boundary, flags, dmamp);
}
int
sun68k_vme_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_VME_SLAVE_MASK;
return error;
}
int
sun68k_vme_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_VME_SLAVE_MASK;
return error;
}