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/* $OpenBSD: sram.c,v 1.20 2010/12/26 15:40:59 miod 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 <mvme68k/dev/memdevs.h>
#include "mc.h"
#if NMC > 0
#include <mvme68k/dev/mcreg.h>
#endif
#include <uvm/uvm_extern.h>
struct sramsoftc {
struct device sc_dev;
paddr_t sc_paddr;
vaddr_t sc_vaddr;
int sc_len;
};
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;
{
struct confargs *ca = args;
if (cputyp == CPU_147)
return (0);
return (!badpaddr(ca->ca_paddr, 1));
}
void
sramattach(parent, self, args)
struct device *parent, *self;
void *args;
{
struct confargs *ca = args;
struct sramsoftc *sc = (struct sramsoftc *)self;
#if defined(MVME162) || defined(MVME172)
struct mcreg *mc;
#endif
switch (cputyp) {
#if defined(MVME162) || defined(MVME172)
case CPU_162:
case CPU_172:
/* XXX this code will almost never be used. just in case. */
mc = sys_mc;
if (!mc)
mc = (struct mcreg *)(IIOV(0xfff00000) + MC_MCCHIP_OFF);
switch (mc->mc_memoptions & MC_MEMOPTIONS_SRAMMASK) {
case MC_MEMOPTIONS_SRAM128K:
sc->sc_len = 128*1024;
break;
case MC_MEMOPTIONS_SRAM512K:
sc->sc_len = 512*1024;
break;
case MC_MEMOPTIONS_SRAM1M:
sc->sc_len = 1024*1024;
break;
case MC_MEMOPTIONS_SRAM2M:
sc->sc_len = 2048*1024;
break;
}
break;
#endif
#ifdef MVME167
case CPU_166:
case CPU_167:
sc->sc_len = 128*1024; /* always 128K */
break;
#endif
#ifdef MVME177
case CPU_176:
case CPU_177:
sc->sc_len = 128*1024; /* always 128K */
break;
#endif
default:
sc->sc_len = 0;
break;
}
printf(": len %d", sc->sc_len);
sc->sc_paddr = ca->ca_paddr;
sc->sc_vaddr = mapiodev(sc->sc_paddr, sc->sc_len);
if (sc->sc_vaddr == 0) {
sc->sc_len = 0;
printf(" -- failed to map");
}
printf("\n");
}
/*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(sc->sc_vaddr, 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 (sc->sc_paddr + off);
}
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