diff options
Diffstat (limited to 'sys/arch/mvme68k/dev/sram.c')
| -rw-r--r-- | sys/arch/mvme68k/dev/sram.c | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/sys/arch/mvme68k/dev/sram.c b/sys/arch/mvme68k/dev/sram.c new file mode 100644 index 00000000000..77299175e89 --- /dev/null +++ b/sys/arch/mvme68k/dev/sram.c @@ -0,0 +1,231 @@ +/* $NetBSD$ */ + +/* + * 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Theo de Raadt + * 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/conf.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/cpu.h> +#include <machine/autoconf.h> +#include <machine/mioctl.h> + +#include "mc.h" + +#if NMC > 0 +#include <mvme68k/dev/mcreg.h> +#endif + +#include <vm/vm.h> + +struct sramsoftc { + struct device sc_dev; + caddr_t sc_paddr; + caddr_t sc_vaddr; + int sc_len; +}; + +void sramattach __P((struct device *, struct device *, void *)); +int srammatch __P((struct device *, void *, void *)); + +struct cfdriver sramcd = { + NULL, "sram", srammatch, sramattach, + DV_DULL, sizeof(struct sramsoftc), 0 +}; + +int +srammatch(parent, vcf, args) + struct device *parent; + void *vcf, *args; +{ + struct cfdata *cf = vcf; + struct confargs *ca = args; + + if (cputyp == CPU_147) + return (0); + if (ca->ca_vaddr == (caddr_t)-1) + return (!badpaddr(ca->ca_paddr, 1)); + return (!badvaddr(ca->ca_vaddr, 1)); +} + +void +sramattach(parent, self, args) + struct device *parent, *self; + void *args; +{ + struct confargs *ca = args; + struct sramsoftc *sc = (struct sramsoftc *)self; + struct mcreg *mc; + int i; + + switch (cputyp) { +#ifdef MVME162 + case CPU_162: + /* 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_167: + case CPU_166: + sc->sc_len = 128*1024; /* always 128K */ + break; +#endif +#ifdef MVME177 + case CPU_177: + XXX + break; +#endif + default: + sc->sc_len = 0; + break; + } + + printf(": len %d", sc->sc_len); + + sc->sc_paddr = ca->ca_paddr; + sc->sc_vaddr = mapiodev((caddr_t)sc->sc_paddr, sc->sc_len); + if (sc->sc_vaddr == NULL) { + sc->sc_len = 0; + printf(" -- failed to map"); + } + printf("\n"); +} + +/*ARGSUSED*/ +int +sramopen(dev, flag, mode) + dev_t dev; + int flag, mode; +{ + if (minor(dev) >= sramcd.cd_ndevs || + sramcd.cd_devs[minor(dev)] == NULL) + return (ENODEV); + return (0); +} + +/*ARGSUSED*/ +int +sramclose(dev, flag, mode) + dev_t dev; + int flag, mode; +{ + + return (0); +} + +/*ARGSUSED*/ +int +sramioctl(dev, cmd, data, flag, p) + dev_t dev; + caddr_t data; + int cmd, flag; + struct proc *p; +{ + int unit = minor(dev); + struct sramsoftc *sc = (struct sramsoftc *) sramcd.cd_devs[unit]; + int error = 0; + + switch (cmd) { + case MIOCGSIZ: + *(int *)data = sc->sc_len; + break; + default: + error = ENOTTY; + break; + } + return (error); +} + +/*ARGSUSED*/ +int +sramread(dev, uio, flags) + dev_t dev; + struct uio *uio; + int flags; +{ + int unit = minor(dev); + struct sramsoftc *sc = (struct sramsoftc *) sramcd.cd_devs[unit]; + + return (memdevrw(sc->sc_vaddr, sc->sc_len, uio, flags)); +} + +/*ARGSUSED*/ +int +sramwrite(dev, uio, flags) + dev_t dev; + struct uio *uio; + int flags; +{ + int unit = minor(dev); + struct sramsoftc *sc = (struct sramsoftc *) sramcd.cd_devs[unit]; + + return (memdevrw(sc->sc_vaddr, sc->sc_len, uio, flags)); +} + +int +srammmap(dev, off, prot) + dev_t dev; + int off, prot; +{ + int unit = minor(dev); + struct sramsoftc *sc = (struct sramsoftc *) sramcd.cd_devs[unit]; + + if (minor(dev) != 0) + return (-1); + + /* allow access only in RAM */ + if (off > sc->sc_len) + return (-1); + return (m68k_btop(sc->sc_paddr + off)); +} |