166 lines
4.0 KiB
C
166 lines
4.0 KiB
C
/* $NetBSD: sram.c,v 1.2 1996/05/12 20:49:57 oki 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);
|
|
}
|