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/* $OpenBSD: sram.c,v 1.20 2009/03/29 21:53:52 sthen Exp $ */
/*
* Copyright (c) 1995 Theo de Raadt
* All rights reserved.
*
* 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/ioctl.h>
#include <sys/buf.h>
#include <sys/systm.h>
#include <sys/uio.h>
#include <sys/malloc.h>
#include <sys/device.h>
#include <machine/autoconf.h>
#include <machine/conf.h>
#include <machine/cpu.h>
#include <machine/mioctl.h>
#include <mvme88k/dev/memdevs.h>
#include <uvm/uvm_extern.h>
struct sramsoftc {
struct device sc_dev;
paddr_t sc_base;
size_t sc_len;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
};
void sramattach(struct device *, struct device *, void *);
int srammatch(struct device *, void *, void *);
struct cfattach sram_ca = {
sizeof(struct sramsoftc), srammatch, sramattach
};
struct cfdriver sram_cd = {
NULL, "sram", DV_DULL
};
int
srammatch(parent, vcf, args)
struct device *parent;
void *vcf, *args;
{
if (brdtyp != BRD_187 && brdtyp != BRD_8120) /* The only ones... */
return (0);
return (1);
}
void
sramattach(parent, self, args)
struct device *parent, *self;
void *args;
{
struct confargs *ca = args;
struct sramsoftc *sc = (struct sramsoftc *)self;
bus_space_handle_t ioh;
sc->sc_iot = ca->ca_iot;
sc->sc_base = ca->ca_paddr;
sc->sc_len = 128 * 1024; /* always 128K */
if (bus_space_map(sc->sc_iot, sc->sc_base, sc->sc_len,
BUS_SPACE_MAP_LINEAR, &ioh) != 0) {
printf(": can't map mem space\n");
return;
}
sc->sc_ioh = ioh;
printf(": %dKB\n", sc->sc_len / 1024);
}
/*ARGSUSED*/
int
sramopen(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
if (minor(dev) >= sram_cd.cd_ndevs ||
sram_cd.cd_devs[minor(dev)] == NULL)
return (ENODEV);
return (0);
}
/*ARGSUSED*/
int
sramclose(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
return (0);
}
/*ARGSUSED*/
int
sramioctl(dev, cmd, data, flag, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
int unit = minor(dev);
struct sramsoftc *sc = (struct sramsoftc *) sram_cd.cd_devs[unit];
int error = 0;
switch (cmd) {
case MIOCGSIZ:
*(int *)data = sc->sc_len;
break;
default:
error = ENOTTY;
break;
}
return (error);
}
/*ARGSUSED*/
int
sramrw(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
int unit = minor(dev);
struct sramsoftc *sc = (struct sramsoftc *) sram_cd.cd_devs[unit];
return memdevrw(bus_space_vaddr(sc->sc_iot, sc->sc_ioh),
sc->sc_len, uio, flags);
}
paddr_t
srammmap(dev, off, prot)
dev_t dev;
off_t off;
int prot;
{
int unit = minor(dev);
struct sramsoftc *sc = (struct sramsoftc *) sram_cd.cd_devs[unit];
if (minor(dev) != 0)
return (-1);
/* allow access only in RAM */
if (off < 0 || off >= round_page(sc->sc_len))
return (-1);
return (atop(sc->sc_base + off));
}
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