/* $OpenBSD: sram.c,v 1.4 1996/06/11 10:15:24 deraadt 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed under OpenBSD by * Theo de Raadt for Willowglen Singapore. * 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 #include #include #include #include #include #include #include #include #include #include #include "mc.h" #if NMC > 0 #include #endif #include struct sramsoftc { struct device sc_dev; void * sc_paddr; void * sc_vaddr; int sc_len; }; void sramattach __P((struct device *, struct device *, void *)); int srammatch __P((struct device *, void *, void *)); struct cfattach sram_ca = { sizeof(struct sramsoftc), srammatch, sramattach }; struct cfdriver sram_cd = { NULL, "sram", DV_DULL, 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 == (void *)-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((void *)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) >= sram_cd.cd_ndevs || sram_cd.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 *) 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 sramread(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)); } /*ARGSUSED*/ int sramwrite(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)); } int srammmap(dev, off, prot) dev_t dev; int off, 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 > sc->sc_len) return (-1); return (m68k_btop(sc->sc_paddr + off)); }