421 lines
10 KiB
C
421 lines
10 KiB
C
/* $NetBSD: vsbus.c,v 1.52 2007/03/04 19:21:56 christos Exp $ */
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/*
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* Copyright (c) 1996, 1999 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/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: vsbus.c,v 1.52 2007/03/04 19:21:56 christos 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/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/device.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 <uvm/uvm_extern.h>
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#define _VAX_BUS_DMA_PRIVATE
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#include <machine/bus.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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#include "locators.h"
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#include "opt_cputype.h"
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int vsbus_match(struct device *, struct cfdata *, void *);
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void vsbus_attach(struct device *, struct device *, void *);
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int vsbus_print(void *, const char *);
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int vsbus_search(struct device *, struct cfdata *,
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const int *, void *);
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static struct vax_bus_dma_tag vsbus_bus_dma_tag = {
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0,
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0,
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0,
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0,
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0,
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0,
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_bus_dmamap_create,
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_bus_dmamap_destroy,
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_bus_dmamap_load,
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_bus_dmamap_load_mbuf,
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_bus_dmamap_load_uio,
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_bus_dmamap_load_raw,
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_bus_dmamap_unload,
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_bus_dmamap_sync,
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_bus_dmamem_alloc,
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_bus_dmamem_free,
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_bus_dmamem_map,
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_bus_dmamem_unmap,
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_bus_dmamem_mmap,
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};
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extern struct vax_bus_space vax_mem_bus_space;
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static SIMPLEQ_HEAD(, vsbus_dma) vsbus_dma;
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CFATTACH_DECL(vsbus, sizeof(struct vsbus_softc),
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vsbus_match, vsbus_attach, NULL, NULL);
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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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aprint_normal(" csr 0x%lx vec %o ipl %x maskbit %d", 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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#if VAX53 || VAXANY
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/* Kludge: VAX53 is... special */
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if (vax_boardtype == VAX_BTYP_53 && (int)aux == 1)
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return 1; /* Hack */
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#endif
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if (vax_bustype == VAX_VSBUS)
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return 1;
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return 0;
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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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int dbase, dsize;
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printf("\n");
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sc->sc_dmatag = vsbus_bus_dma_tag;
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switch (vax_boardtype) {
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#if VAX49 || VAX53
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case VAX_BTYP_53:
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case VAX_BTYP_49:
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sc->sc_vsregs = vax_map_physmem(0x25c00000, 1);
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sc->sc_intreq = (char *)sc->sc_vsregs + 12;
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sc->sc_intclr = (char *)sc->sc_vsregs + 12;
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sc->sc_intmsk = (char *)sc->sc_vsregs + 8;
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vsbus_dma_init(sc, 8192);
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break;
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#endif
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#if VAX46 || VAX48
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case VAX_BTYP_48:
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case VAX_BTYP_46:
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sc->sc_vsregs = vax_map_physmem(VS_REGS, 1);
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sc->sc_intreq = (char *)sc->sc_vsregs + 15;
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sc->sc_intclr = (char *)sc->sc_vsregs + 15;
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sc->sc_intmsk = (char *)sc->sc_vsregs + 12;
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vsbus_dma_init(sc, 32768);
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#endif
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default:
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sc->sc_vsregs = vax_map_physmem(VS_REGS, 1);
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sc->sc_intreq = (char *)sc->sc_vsregs + 15;
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sc->sc_intclr = (char *)sc->sc_vsregs + 15;
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sc->sc_intmsk = (char *)sc->sc_vsregs + 12;
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if (vax_boardtype == VAX_BTYP_410) {
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dbase = KA410_DMA_BASE;
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dsize = KA410_DMA_SIZE;
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} else {
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dbase = KA420_DMA_BASE;
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dsize = KA420_DMA_SIZE;
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*(char *)(sc->sc_vsregs + 0xe0) = 1; /* Big DMA */
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}
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sc->sc_dmasize = dsize;
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sc->sc_dmaaddr = uvm_km_alloc(kernel_map, dsize, 0,
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UVM_KMF_VAONLY);
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ioaccess(sc->sc_dmaaddr, dbase, dsize/VAX_NBPG);
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break;
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}
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SIMPLEQ_INIT(&vsbus_dma);
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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_intmsk = 0;
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*sc->sc_intclr = 0xff;
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DELAY(1000000); /* Wait a second */
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sc->sc_mask = *sc->sc_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_ia(vsbus_search, self, "vsbus", NULL);
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/* Autoconfig finished, enable interrupts */
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*sc->sc_intmsk = ~sc->sc_mask;
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}
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int
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vsbus_search(parent, cf, ldesc, aux)
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struct device *parent;
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struct cfdata *cf;
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const int *ldesc;
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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[VSBUSCF_CSR];
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va.va_addr = vax_map_physmem(va.va_paddr, 1);
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va.va_dmat = &sc->sc_dmatag;
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va.va_iot = &vax_mem_bus_space;
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*sc->sc_intmsk = 0;
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*sc->sc_intclr = 0xff;
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scb_vecref(0, 0); /* Clear vector ref */
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i = config_match(parent, cf, &va);
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vax_unmap_physmem(va.va_addr, 1);
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c = *sc->sc_intreq & ~sc->sc_mask;
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if (i == 0)
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goto forgetit;
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if (i > 10)
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c = sc->sc_mask; /* Fooling interrupt */
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else if (c == 0)
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goto forgetit;
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*sc->sc_intmsk = c;
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DELAY(100);
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*sc->sc_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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va.va_br = br;
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va.va_cvec = vec;
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va.va_dmaaddr = sc->sc_dmaaddr;
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va.va_dmasize = sc->sc_dmasize;
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*sc->sc_intmsk = c; /* Allow interrupts during attach */
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config_attach(parent, cf, &va, vsbus_print);
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*sc->sc_intmsk = 0;
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return 0;
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fail:
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printf("%s%d at %s csr 0x%x %s\n",
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cf->cf_name, cf->cf_unit, parent->dv_xname,
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cf->cf_loc[VSBUSCF_CSR], (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;
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unsigned char ch;
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if (vsbus_cd.cd_ndevs == 0)
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return 0;
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sc = vsbus_cd.cd_devs[0];
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ch = *sc->sc_intmsk;
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*sc->sc_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;
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if (vsbus_cd.cd_ndevs == 0)
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return;
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sc = vsbus_cd.cd_devs[0];
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*sc->sc_intclr = mask;
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}
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/*
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* Copy data from/to a user process' space from the DMA area.
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* Use the physical memory directly.
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*/
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void
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vsbus_copytoproc(struct proc *p, void *fromv, void *tov, int len)
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{
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char *from = fromv, *to = tov;
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struct pte *pte;
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paddr_t pa;
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if ((vaddr_t)to & KERNBASE) { /* In kernel space */
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bcopy(from, to, len);
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return;
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}
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#ifdef DIAGNOSTIC
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if (p == NULL)
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panic("vsbus_copytoproc: no proc");
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#endif
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if ((vaddr_t)to & 0x40000000)
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pte = &p->p_vmspace->vm_map.pmap->pm_p1br[vax_btop((vaddr_t)to & ~0x40000000)];
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else
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pte = &p->p_vmspace->vm_map.pmap->pm_p0br[vax_btop((vaddr_t)to)];
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if ((vaddr_t)to & PGOFSET) {
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int cz = round_page((vaddr_t)to) - (vaddr_t)to;
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pa = (pte->pg_pfn << VAX_PGSHIFT) | (PAGE_SIZE - cz) | KERNBASE;
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bcopy(from, (void *)pa, min(cz, len));
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from += cz;
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to += cz;
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len -= cz;
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pte += 8; /* XXX */
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}
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while (len > 0) {
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pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE;
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bcopy(from, (void *)pa, min(PAGE_SIZE, len));
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from += PAGE_SIZE;
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to += PAGE_SIZE;
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len -= PAGE_SIZE;
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pte += 8; /* XXX */
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}
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}
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void
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vsbus_copyfromproc(struct proc *p, void *fromv, void *tov, int len)
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{
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char *from = fromv, *to = tov;
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struct pte *pte;
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paddr_t pa;
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if ((vaddr_t)from & KERNBASE) { /* In kernel space */
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bcopy(from, to, len);
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return;
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}
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#ifdef DIAGNOSTIC
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if (p == NULL)
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panic("vsbus_copyfromproc: no proc");
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#endif
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if ((vaddr_t)from & 0x40000000)
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pte = &p->p_vmspace->vm_map.pmap->pm_p1br[vax_btop((vaddr_t)from & ~0x40000000)];
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else
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pte = &p->p_vmspace->vm_map.pmap->pm_p0br[vax_btop((vaddr_t)from)];
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if ((vaddr_t)from & PGOFSET) {
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int cz = round_page((vaddr_t)from) - (vaddr_t)from;
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pa = (pte->pg_pfn << VAX_PGSHIFT) | (PAGE_SIZE - cz) | KERNBASE;
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bcopy((void *)pa, to, min(cz, len));
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from += cz;
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to += cz;
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len -= cz;
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pte += 8; /* XXX */
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}
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while (len > 0) {
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pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE;
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bcopy((void *)pa, to, min(PAGE_SIZE, len));
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from += PAGE_SIZE;
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to += PAGE_SIZE;
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len -= PAGE_SIZE;
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pte += 8; /* XXX */
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}
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}
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/*
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* There can only be one user of the DMA area on VS2k/VS3100 at one
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* time, so keep track of it here.
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*/
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static int vsbus_active = 0;
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void
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vsbus_dma_start(struct vsbus_dma *vd)
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{
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SIMPLEQ_INSERT_TAIL(&vsbus_dma, vd, vd_q);
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if (vsbus_active == 0)
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vsbus_dma_intr();
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}
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void
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vsbus_dma_intr(void)
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{
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struct vsbus_dma *vd;
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vd = SIMPLEQ_FIRST(&vsbus_dma);
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if (vd == NULL) {
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vsbus_active = 0;
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return;
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}
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vsbus_active = 1;
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SIMPLEQ_REMOVE_HEAD(&vsbus_dma, vd_q);
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(*vd->vd_go)(vd->vd_arg);
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}
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