375 lines
9.9 KiB
C
375 lines
9.9 KiB
C
/* $NetBSD: mem.c,v 1.7 2003/11/01 18:23:37 matt Exp $ */
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/* $OpenBSD: mem.c,v 1.5 2001/05/05 20:56:36 art Exp $ */
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/*
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* Copyright (c) 1998,1999 Michael Shalayeff
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Michael Shalayeff.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF MIND,
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1991,1992,1994, The University of Utah and
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* the Computer Systems Laboratory (CSL). All rights reserved.
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*
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* Subject to your agreements with CMU,
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* permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
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* IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
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* ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* CSL requests users of this software to return to csl-dist@cs.utah.edu any
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* improvements that they make and grant CSL redistribution rights.
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*
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* Utah $Hdr: mem.c 1.9 94/12/16$
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*/
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/*
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* Mach Operating System
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* Copyright (c) 1992 Carnegie Mellon University
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* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie Mellon
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* the rights to redistribute these changes.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: mem.c,v 1.7 2003/11/01 18:23:37 matt Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/buf.h>
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#include <sys/conf.h>
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#include <sys/malloc.h>
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#include <sys/proc.h>
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#include <sys/uio.h>
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#include <sys/types.h>
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#include <sys/device.h>
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#include <sys/errno.h>
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#include <sys/ioctl.h>
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#include <sys/file.h>
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#include <uvm/uvm.h>
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#include <machine/bus.h>
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#include <machine/iomod.h>
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#include <machine/autoconf.h>
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#include <machine/pmap.h>
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#include <hp700/hp700/machdep.h>
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#include <hp700/dev/cpudevs.h>
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#include <hp700/dev/viper.h>
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struct mem_softc {
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struct device sc_dev;
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volatile struct vi_trs *sc_vp;
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};
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int memmatch __P((struct device *, struct cfdata *, void *));
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void memattach __P((struct device *, struct device *, void *));
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CFATTACH_DECL(mem, sizeof(struct mem_softc),
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memmatch, memattach, NULL, NULL);
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extern struct cfdriver mem_cd;
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dev_type_read(mmrw);
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dev_type_ioctl(mmioctl);
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dev_type_mmap(mmmmap);
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const struct cdevsw mem_cdevsw = {
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nullopen, nullclose, mmrw, mmrw, mmioctl,
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nostop, notty, nopoll, mmmmap,
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};
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static caddr_t zeropage;
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/* A lock for the vmmap, 16-byte aligned as PA-RISC semaphores must be. */
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static __cpu_simple_lock_t vmmap_lock;
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int
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memmatch(parent, cf, aux)
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struct device *parent;
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struct cfdata *cf;
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void *aux;
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{
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register struct confargs *ca = aux;
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if (ca->ca_type.iodc_type != HPPA_TYPE_MEMORY ||
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ca->ca_type.iodc_sv_model != HPPA_MEMORY_PDEP)
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return 0;
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return 1;
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}
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void
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memattach(parent, self, aux)
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struct device *parent;
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struct device *self;
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void *aux;
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{
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struct pdc_iodc_minit pdc_minit PDC_ALIGNMENT;
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register struct confargs *ca = aux;
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register struct mem_softc *sc = (struct mem_softc *)self;
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int err;
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int pagezero_cookie;
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printf (":");
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pagezero_cookie = hp700_pagezero_map();
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/* XXX check if we are dealing w/ Viper */
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if (ca->ca_hpa == (hppa_hpa_t)VIPER_HPA) {
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int s;
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char bits[128];
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sc->sc_vp = (struct vi_trs *)
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&((struct iomod *)ca->ca_hpa)->priv_trs;
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bitmask_snprintf(VI_CTRL, VIPER_BITS, bits, sizeof(bits));
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printf (" viper rev %x, ctrl %s",
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sc->sc_vp->vi_status.hw_rev,
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bits);
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s = splhigh();
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VI_CTRL |= VI_CTRL_ANYDEN;
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((struct vi_ctrl *)&VI_CTRL)->core_den = 0;
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((struct vi_ctrl *)&VI_CTRL)->sgc0_den = 0;
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((struct vi_ctrl *)&VI_CTRL)->sgc1_den = 0;
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((struct vi_ctrl *)&VI_CTRL)->core_prf = 1;
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sc->sc_vp->vi_control = VI_CTRL;
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splx(s);
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#ifdef DEBUG
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bitmask_snprintf(VI_CTRL, VIPER_BITS, bits, sizeof(bits));
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printf (" >> %s", bits);
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#endif
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} else
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sc->sc_vp = NULL;
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if ((err = pdc_call((iodcio_t)pdc, 0, PDC_IODC, PDC_IODC_NINIT,
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&pdc_minit, ca->ca_hpa, PAGE0->imm_spa_size)) < 0)
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pdc_minit.max_spa = PAGE0->imm_max_mem;
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hp700_pagezero_unmap(pagezero_cookie);
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printf (" size %d", pdc_minit.max_spa / (1024*1024));
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if (pdc_minit.max_spa % (1024*1024))
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printf (".%d", pdc_minit.max_spa % (1024*1024));
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printf ("MB\n");
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}
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void
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viper_setintrwnd(mask)
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u_int32_t mask;
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{
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register struct mem_softc *sc;
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sc = mem_cd.cd_devs[0];
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if (sc->sc_vp)
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sc->sc_vp->vi_intrwd;
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}
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void
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viper_eisa_en()
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{
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register struct mem_softc *sc;
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int pagezero_cookie;
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sc = mem_cd.cd_devs[0];
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pagezero_cookie = hp700_pagezero_map();
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if (sc->sc_vp)
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((struct vi_ctrl *)&VI_CTRL)->eisa_den = 0;
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hp700_pagezero_unmap(pagezero_cookie);
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}
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int
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mmrw(dev, uio, flags)
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dev_t dev;
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struct uio *uio;
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int flags;
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{
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register u_int c;
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register struct iovec *iov;
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int error = 0;
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int32_t lockheld = 0;
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vaddr_t v, o;
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vm_prot_t prot;
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int rw;
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while (uio->uio_resid > 0 && error == 0) {
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iov = uio->uio_iov;
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if (iov->iov_len == 0) {
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uio->uio_iov++;
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uio->uio_iovcnt--;
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if (uio->uio_iovcnt < 0)
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panic("mmrw");
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continue;
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}
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switch (minor(dev)) {
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case DEV_MEM: /* /dev/mem */
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/* If the address isn't in RAM, bail. */
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v = uio->uio_offset;
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if (btoc(v) > totalphysmem) {
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error = EFAULT;
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/* this will break us out of the loop */
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continue;
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}
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/*
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* If the address is inside our large
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* directly-mapped kernel BTLB entries,
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* use kmem instead.
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*/
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if (v < virtual_start) {
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goto use_kmem;
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}
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/*
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* If we don't already hold the vmmap lock,
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* acquire it.
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*/
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while (!lockheld) {
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lockheld = __cpu_simple_lock_try(&vmmap_lock);
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if (lockheld)
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break;
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error = tsleep((caddr_t)&vmmap_lock,
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PZERO | PCATCH,
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"mmrw", 0);
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if (error)
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return (error);
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}
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/* Temporarily map the memory at vmmap. */
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prot = uio->uio_rw == UIO_READ ? VM_PROT_READ :
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VM_PROT_WRITE;
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pmap_enter(pmap_kernel(), (vaddr_t)vmmap,
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trunc_page(v), prot, prot|PMAP_WIRED);
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pmap_update(pmap_kernel());
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o = v & PGOFSET;
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c = min(uio->uio_resid, (int)(PAGE_SIZE - o));
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error = uiomove((caddr_t)vmmap + o, c, uio);
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pmap_remove(pmap_kernel(), (vaddr_t)vmmap,
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(vaddr_t)vmmap + PAGE_SIZE);
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pmap_update(pmap_kernel());
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break;
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case DEV_KMEM: /* /dev/kmem */
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v = uio->uio_offset;
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use_kmem:
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o = v & PGOFSET;
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c = min(uio->uio_resid, (int)(PAGE_SIZE - o));
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rw = (uio->uio_rw == UIO_READ) ? B_READ : B_WRITE;
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if (!uvm_kernacc((caddr_t)v, c, rw)) {
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error = EFAULT;
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/* this will break us out of the loop */
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continue;
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}
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error = uiomove((caddr_t)v, c, uio);
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break;
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case DEV_NULL: /* /dev/null */
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if (uio->uio_rw == UIO_WRITE)
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uio->uio_resid = 0;
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return (0);
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case DEV_ZERO: /* /dev/zero */
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/* Write to /dev/zero is ignored. */
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if (uio->uio_rw == UIO_WRITE) {
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uio->uio_resid = 0;
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return (0);
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}
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/*
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* On the first call, allocate and zero a page
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* of memory for use with /dev/zero.
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*/
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if (zeropage == NULL) {
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zeropage = (caddr_t)
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malloc(PAGE_SIZE, M_TEMP, M_WAITOK);
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memset(zeropage, 0, PAGE_SIZE);
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}
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c = min(iov->iov_len, PAGE_SIZE);
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error = uiomove(zeropage, c, uio);
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break;
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default:
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return (ENXIO);
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}
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}
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/* If we hold the vmmap lock, release it. */
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if (lockheld) {
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__cpu_simple_unlock(&vmmap_lock);
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wakeup((caddr_t)&vmmap_lock);
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}
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return (error);
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}
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paddr_t
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mmmmap(dev, off, prot)
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dev_t dev;
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off_t off;
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int prot;
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{
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if (minor(dev) != 0)
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return (-1);
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/*
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* Allow access only in RAM.
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*/
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#if 0
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if (off < ctob(firstusablepage) ||
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off >= ctob(lastusablepage + 1))
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return (-1);
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#endif
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return (btop(off));
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}
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