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/*-
* Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com>
* All rights reserved.
*
* This software was developed by SRI International and the University of
* Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
* ("CTSRD"), as part of the DARPA CRASH research programme.
*
* 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 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 AUTHOR 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.
*/
/*
* BERI memory interface.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/malloc.h>
#include <sys/rman.h>
#include <sys/timeet.h>
#include <sys/timetc.h>
#include <sys/conf.h>
#include <sys/uio.h>
#include <dev/fdt/fdt_common.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <machine/bus.h>
#include <machine/fdt.h>
#include <machine/cpu.h>
#include <machine/intr.h>
struct beri_mem_softc {
struct resource *res[1];
struct cdev *mem_cdev;
device_t dev;
int mem_size;
int mem_start;
};
static struct resource_spec beri_mem_spec[] = {
{ SYS_RES_MEMORY, 0, RF_ACTIVE },
{ -1, 0 }
};
static int
mem_open(struct cdev *dev, int flags __unused,
int fmt __unused, struct thread *td __unused)
{
struct beri_mem_softc *sc;
sc = dev->si_drv1;
return (0);
}
static int
mem_close(struct cdev *dev, int flags __unused,
int fmt __unused, struct thread *td __unused)
{
struct beri_mem_softc *sc;
sc = dev->si_drv1;
return (0);
}
static int
mem_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flags,
struct thread *td)
{
return (0);
}
static int
mem_mmap(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr, int nprot,
vm_memattr_t *memattr)
{
struct beri_mem_softc *sc;
sc = dev->si_drv1;
if (offset < sc->mem_size) {
*paddr = sc->mem_start + offset;
return (0);
}
return (EINVAL);
}
static struct cdevsw mem_cdevsw = {
.d_version = D_VERSION,
.d_open = mem_open,
.d_close = mem_close,
.d_ioctl = mem_ioctl,
.d_mmap = mem_mmap,
.d_name = "BERI memory",
};
static int
beri_mem_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (!ofw_bus_is_compatible(dev, "sri-cambridge,beri-mem"))
return (ENXIO);
device_set_desc(dev, "BERI memory");
return (BUS_PROBE_DEFAULT);
}
static int
beri_mem_attach(device_t dev)
{
struct beri_mem_softc *sc;
sc = device_get_softc(dev);
sc->dev = dev;
if (bus_alloc_resources(dev, beri_mem_spec, sc->res)) {
device_printf(dev, "could not allocate resources\n");
return (ENXIO);
}
/* Memory info */
sc->mem_size = rman_get_size(sc->res[0]);
sc->mem_start = rman_get_start(sc->res[0]);
sc->mem_cdev = make_dev(&mem_cdevsw, 0, UID_ROOT, GID_WHEEL,
0600, "beri_mem");
if (sc->mem_cdev == NULL) {
device_printf(dev, "Failed to create character device.\n");
return (ENXIO);
}
sc->mem_cdev->si_drv1 = sc;
return (0);
}
static device_method_t beri_mem_methods[] = {
DEVMETHOD(device_probe, beri_mem_probe),
DEVMETHOD(device_attach, beri_mem_attach),
{ 0, 0 }
};
static driver_t beri_mem_driver = {
"beri_mem",
beri_mem_methods,
sizeof(struct beri_mem_softc),
};
static devclass_t beri_mem_devclass;
DRIVER_MODULE(beri_mem, simplebus, beri_mem_driver, beri_mem_devclass, 0, 0);
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