236 lines
6.2 KiB
C
236 lines
6.2 KiB
C
/* $NetBSD: vsbus.c,v 1.16 1999/03/13 15:16:48 ragge Exp $ */
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/*
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* Copyright (c) 1996 Ludd, University of Lule}, Sweden.
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* All rights reserved.
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*
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* This code is derived from software contributed to Ludd by Bertram Barth.
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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 at Ludd, University of
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* Lule}, Sweden and its contributors.
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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 USE,
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* 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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#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/file.h>
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#include <sys/ioctl.h>
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#include <sys/proc.h>
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#include <sys/user.h>
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#include <sys/map.h>
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#include <sys/device.h>
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#include <sys/dkstat.h>
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#include <sys/disklabel.h>
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#include <sys/syslog.h>
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#include <sys/stat.h>
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#include <machine/pte.h>
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#include <machine/sid.h>
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#include <machine/scb.h>
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#include <machine/cpu.h>
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#include <machine/trap.h>
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#include <machine/nexus.h>
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#include <machine/uvax.h>
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#include <machine/ka410.h>
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#include <machine/ka420.h>
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#include <machine/ka43.h>
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#include <machine/vsbus.h>
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#include "ioconf.h"
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int vsbus_match __P((struct device *, struct cfdata *, void *));
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void vsbus_attach __P((struct device *, struct device *, void *));
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int vsbus_print __P((void *, const char *));
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int vsbus_search __P((struct device *, struct cfdata *, void *));
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void ka410_attach __P((struct device *, struct device *, void *));
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void ka43_attach __P((struct device *, struct device *, void *));
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struct vsbus_softc {
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struct device sc_dev;
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volatile struct vs_cpu *sc_cpu;
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u_char sc_mask; /* Interrupts to enable after autoconf */
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};
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struct cfattach vsbus_ca = {
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sizeof(struct vsbus_softc), vsbus_match, vsbus_attach
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};
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int
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vsbus_print(aux, name)
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void *aux;
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const char *name;
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{
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struct vsbus_attach_args *va = aux;
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printf(" csr 0x%lx vec %o ipl %x maskbit %x", va->va_paddr,
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va->va_cvec & 511, va->va_br, va->va_maskno - 1);
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return(UNCONF);
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}
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int
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vsbus_match(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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struct bp_conf *bp = aux;
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if (strcmp(bp->type, "vsbus"))
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return 0;
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/*
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* on machines which can have it, the vsbus is always there
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*/
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if ((vax_bustype & VAX_VSBUS) == 0)
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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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vsbus_attach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct vsbus_softc *sc = (void *)self;
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printf("\n");
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sc->sc_cpu = (void *)vax_map_physmem(VS_REGS, 1);
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/*
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* First: find which interrupts we won't care about.
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* There are interrupts that interrupt on a periodic basic
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* that we don't want to interfere with the rest of the
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* interrupt probing.
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*/
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sc->sc_cpu->vc_intmsk = 0;
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sc->sc_cpu->vc_intclr = 0xff;
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DELAY(1000000); /* Wait a second */
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sc->sc_mask = sc->sc_cpu->vc_intreq;
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printf("%s: interrupt mask %x\n", self->dv_xname, sc->sc_mask);
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/*
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* now check for all possible devices on this "bus"
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*/
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config_search(vsbus_search, self, NULL);
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/* Autoconfig finished, enable interrupts */
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sc->sc_cpu->vc_intmsk = ~sc->sc_mask;
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}
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int
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vsbus_search(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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struct vsbus_softc *sc = (void *)parent;
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struct vsbus_attach_args va;
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int i, vec, br;
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u_char c;
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va.va_paddr = cf->cf_loc[0];
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va.va_addr = vax_map_physmem(va.va_paddr, 1);
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sc->sc_cpu->vc_intmsk = 0;
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sc->sc_cpu->vc_intclr = 0xff;
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scb_vecref(0, 0); /* Clear vector ref */
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i = (*cf->cf_attach->ca_match) (parent, cf, &va);
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vax_unmap_physmem(va.va_addr, 1);
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c = sc->sc_cpu->vc_intreq & ~sc->sc_mask;
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if (i > 10)
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c = sc->sc_mask; /* Fooling interrupt */
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if (c == 0 || i == 0)
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goto forgetit;
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sc->sc_cpu->vc_intmsk = c;
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DELAY(100);
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sc->sc_cpu->vc_intmsk = 0;
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va.va_maskno = ffs((u_int)c);
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i = scb_vecref(&vec, &br);
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if (i == 0)
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goto fail;
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if (vec == 0)
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goto fail;
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scb_vecalloc(vec, va.va_ivec, cf->cf_unit, SCB_ISTACK);
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va.va_br = br;
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va.va_cvec = vec;
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config_attach(parent, cf, &va, vsbus_print);
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return 0;
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fail:
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printf("%s%d at %s csr %x %s\n",
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cf->cf_driver->cd_name, cf->cf_unit, parent->dv_xname,
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cf->cf_loc[0], (i ? "zero vector" : "didn't interrupt"));
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forgetit:
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return 0;
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}
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/*
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* Sets a new interrupt mask. Returns the old one.
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* Works like spl functions.
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*/
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unsigned char
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vsbus_setmask(mask)
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unsigned char mask;
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{
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struct vsbus_softc *sc = vsbus_cd.cd_devs[0];
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unsigned char ch;
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ch = sc->sc_cpu->vc_intmsk;
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sc->sc_cpu->vc_intmsk = mask;
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return ch;
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}
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/*
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* Clears the interrupts in mask.
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*/
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void
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vsbus_clrintr(mask)
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unsigned char mask;
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{
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struct vsbus_softc *sc = vsbus_cd.cd_devs[0];
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sc->sc_cpu->vc_intclr = mask;
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}
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#ifdef notyet
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/*
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* Allocate/free DMA pages and other bus resources.
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* VS2000: All DMA and register access must be exclusive.
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* VS3100: DMA area may be accessed by anyone anytime.
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* MFM/SCSI: Don't touch reg's while DMA is active.
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* SCSI/SCSI: Legal to touch any register anytime.
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*/
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#endif
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