NetBSD/sys/arch/x68k/dev/sram.c

166 lines
4.0 KiB
C

/* $NetBSD: sram.c,v 1.4 1996/10/13 03:35:08 christos Exp $ */
/*
* Copyright (c) 1994 Kazuhisa Shimizu.
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Kazuhisa Shimizu.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* 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/proc.h>
#include <sys/ioctl.h>
#include <sys/file.h>
#include <sys/malloc.h>
#include <sys/systm.h>
#include <machine/sram.h>
#include <x68k/dev/sramvar.h>
#include <x68k/x68k/iodevice.h>
#include "sram.h"
struct sram_softc sram_softc;
#ifdef DEBUG
#define SRAM_DEBUG_OPEN 0x01
#define SRAM_DEBUG_CLOSE 0x02
#define SRAM_DEBUG_IOCTL 0x03
int sramdebug = SRAM_DEBUG_IOCTL;
#endif
/*
* functions for probeing.
*/
/* ARGSUSED */
void
sramattach(num)
int num;
{
sram_softc.flags = 0;
printf("sram0: 16k bytes accessible\n");
}
/*
* functions made available by conf.c
*/
/*ARGSUSED*/
int
sramopen(dev, flags)
dev_t dev;
int flags;
{
struct sram_softc *su = &sram_softc;
#ifdef DEBUG
if (sramdebug & SRAM_DEBUG_OPEN)
printf ("Sram open\n");
#endif
if (minor(dev) >= 1)
return EXDEV;
if (su->flags & SRF_OPEN) {
return (EBUSY);
}
su->flags |= SRF_OPEN;
return (0);
}
/*ARGSUSED*/
void
sramclose (dev, flags)
dev_t dev;
int flags;
{
struct sram_softc *su = &sram_softc;
#ifdef DEBUG
if (sramdebug & SRAM_DEBUG_CLOSE)
printf ("Sram close\n");
#endif
if (su->flags & SRF_OPEN) {
su->flags = 0;
}
}
/*ARGSUSED*/
int
sramioctl (dev, cmd, data, flag, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
int error = 0;
struct sram_io *sram_io;
register char *sramtop = IODEVbase->io_sram;
#ifdef DEBUG
if (sramdebug & SRAM_DEBUG_IOCTL)
printf("Sram ioctl cmd=%lx\n", cmd);
#endif
sram_io = (struct sram_io *)data;
switch (cmd) {
case SIOGSRAM:
#ifdef DEBUG
if (sramdebug & SRAM_DEBUG_IOCTL) {
printf("Sram ioctl SIOGSRAM address=%p\n", data);
printf("Sram ioctl SIOGSRAM offset=%x\n", sram_io->offset);
}
#endif
if (sram_io == NULL ||
sram_io->offset + SRAM_IO_SIZE > SRAM_SIZE)
return(EFAULT);
bcopy(sramtop + sram_io->offset, &(sram_io->sram), SRAM_IO_SIZE);
break;
case SIOPSRAM:
#ifdef DEBUG
if (sramdebug & SRAM_DEBUG_IOCTL) {
printf("Sram ioctl SIOSSRAM address=%p\n", data);
printf("Sram ioctl SIOSSRAM offset=%x\n", sram_io->offset);
}
#endif
if (sram_io == NULL ||
sram_io->offset + SRAM_IO_SIZE > SRAM_SIZE)
return(EFAULT);
sysport.sramwp = 0x31;
bcopy(&(sram_io->sram), sramtop + sram_io->offset,SRAM_IO_SIZE);
sysport.sramwp = 0x00;
break;
default:
error = EINVAL;
break;
}
return (error);
}