310 lines
7.3 KiB
C
310 lines
7.3 KiB
C
/* $NetBSD: if_ie_vme.c,v 1.9 1997/10/17 03:44:49 gwr Exp $ */
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/*-
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* Copyright (c) 1996 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Gordon W. Ross.
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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 the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Machine-dependent glue for the Intel Ethernet (ie) driver.
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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/device.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <net/if_ether.h>
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#ifdef INET
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/in_var.h>
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#include <netinet/ip.h>
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#include <netinet/if_inarp.h>
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#endif
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#include <machine/autoconf.h>
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#include <machine/cpu.h>
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#include <machine/dvma.h>
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#include <machine/idprom.h>
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#include <machine/vmparam.h>
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#include "i82586.h"
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#include "if_iereg.h"
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#include "if_ievar.h"
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static void ie_vmereset __P((struct ie_softc *));
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static void ie_vmeattend __P((struct ie_softc *));
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static void ie_vmerun __P((struct ie_softc *));
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/*
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* zero/copy functions: OBIO can use the normal functions, but VME
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* must do only byte or half-word (16 bit) accesses...
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*/
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static void wcopy __P((const void *vb1, void *vb2, u_int l));
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static void wzero __P((void *vb, u_int l));
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/*
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* New-style autoconfig attachment
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*/
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static int ie_vmes_match __P((struct device *, struct cfdata *, void *));
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static void ie_vmes_attach __P((struct device *, struct device *, void *));
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struct cfattach ie_vmes_ca = {
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sizeof(struct ie_softc), ie_vmes_match, ie_vmes_attach
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};
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static int
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ie_vmes_match(parent, cf, args)
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struct device *parent;
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struct cfdata *cf;
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void *args;
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{
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struct confargs *ca = args;
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/* No default VME address. */
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if (ca->ca_paddr == -1)
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return(0);
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/* Make sure something is there... */
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if (bus_peek(ca->ca_bustype, ca->ca_paddr, 2) == -1)
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return (0);
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/* Default interrupt priority. */
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if (ca->ca_intpri == -1)
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ca->ca_intpri = 3;
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return (1);
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}
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/*
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* *note*: we don't detect the difference between a VME3E and
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* a multibus/vme card. if you want to use a 3E you'll have
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* to fix this.
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*/
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void
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ie_vmes_attach(parent, self, args)
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struct device *parent;
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struct device *self;
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void *args;
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{
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struct ie_softc *sc = (void *) self;
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struct confargs *ca = args;
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volatile struct ievme *iev;
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u_long rampaddr;
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int lcv, off;
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sc->hard_type = IE_VME;
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sc->reset_586 = ie_vmereset;
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sc->chan_attn = ie_vmeattend;
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sc->run_586 = ie_vmerun;
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sc->sc_bcopy = wcopy;
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sc->sc_bzero = wzero;
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/*
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* There is 64K of memory on the VME board.
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* (determined by hardware - NOT configurable!)
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*/
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sc->sc_msize = 0x10000; /* MEMSIZE 64K */
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/* Map in the board control regs. */
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sc->sc_reg = bus_mapin(ca->ca_bustype, ca->ca_paddr,
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sizeof(struct ievme));
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iev = (volatile struct ievme *) sc->sc_reg;
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/*
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* Find and map in the board memory.
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*/
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/* top 12 bits */
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rampaddr = ca->ca_paddr & 0xfff00000;
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/* 4 more */
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rampaddr |= ((iev->status & IEVME_HADDR) << 16);
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sc->sc_maddr = bus_mapin(ca->ca_bustype, rampaddr, sc->sc_msize);
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/*
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* On this hardware, the i82586 address is just
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* masked to 16 bits, so sc_iobase == sc_maddr
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*/
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sc->sc_iobase = sc->sc_maddr;
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/*
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* Set up on-board mapping registers for linear map.
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*/
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iev->pectrl |= IEVME_PARACK; /* clear to start */
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for (lcv = 0; lcv < IEVME_MAPSZ; lcv++)
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iev->pgmap[lcv] = IEVME_SBORDR | IEVME_OBMEM | lcv;
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(sc->sc_bzero)(sc->sc_maddr, sc->sc_msize);
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/*
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* Set the System Configuration Pointer (SCP).
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* Its location is system-dependent because the
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* i82586 reads it from a fixed physical address.
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* On this hardware, the i82586 address is just
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* masked down to 16 bits, so the SCP is found
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* at the end of the RAM on the VME board.
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*/
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off = IE_SCP_ADDR & 0xFFFF;
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sc->scp = (volatile void *) (sc->sc_maddr + off);
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/*
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* The rest of ram is used for buffers, etc.
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*/
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sc->buf_area = sc->sc_maddr;
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sc->buf_area_sz = off;
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/* Set the ethernet address. */
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idprom_etheraddr(sc->sc_addr);
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/* Do machine-independent parts of attach. */
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ie_attach(sc);
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/* Install interrupt handler. */
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isr_add_vectored(ie_intr, (void *)sc,
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ca->ca_intpri, ca->ca_intvec);
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}
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/*
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* MULTIBUS/VME support
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*/
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void
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ie_vmereset(sc)
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struct ie_softc *sc;
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{
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volatile struct ievme *iev = (struct ievme *) sc->sc_reg;
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iev->status = IEVME_RESET;
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delay(100); /* XXX could be shorter? */
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iev->status = 0;
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}
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void
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ie_vmeattend(sc)
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struct ie_softc *sc;
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{
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volatile struct ievme *iev = (struct ievme *) sc->sc_reg;
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iev->status |= IEVME_ATTEN; /* flag! */
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iev->status &= ~IEVME_ATTEN; /* down. */
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}
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void
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ie_vmerun(sc)
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struct ie_softc *sc;
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{
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volatile struct ievme *iev = (struct ievme *) sc->sc_reg;
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iev->status |= (IEVME_ONAIR | IEVME_IENAB | IEVME_PEINT);
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}
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/*
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* wcopy/wzero - like bcopy/bzero but largest access is 16-bits,
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* and also does byte swaps...
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* XXX - Would be nice to have asm versions in some library...
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*/
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static void
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wzero(vb, l)
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void *vb;
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u_int l;
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{
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u_char *b = vb;
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u_char *be = b + l;
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u_short *sp;
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if (l == 0)
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return;
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/* front, */
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if ((u_long)b & 1)
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*b++ = 0;
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/* back, */
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if (b != be && ((u_long)be & 1) != 0) {
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be--;
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*be = 0;
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}
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/* and middle. */
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sp = (u_short *)b;
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while (sp != (u_short *)be)
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*sp++ = 0;
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}
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static void
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wcopy(vb1, vb2, l)
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const void *vb1;
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void *vb2;
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u_int l;
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{
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const u_char *b1e, *b1 = vb1;
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u_char *b2 = vb2;
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u_short *sp;
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int bstore = 0;
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if (l == 0)
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return;
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/* front, */
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if ((u_long)b1 & 1) {
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*b2++ = *b1++;
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l--;
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}
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/* middle, */
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sp = (u_short *)b1;
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b1e = b1 + l;
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if (l & 1)
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b1e--;
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bstore = (u_long)b2 & 1;
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while (sp < (u_short *)b1e) {
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if (bstore) {
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b2[1] = *sp & 0xff;
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b2[0] = *sp >> 8;
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} else
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*((short *)b2) = *sp;
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sp++;
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b2 += 2;
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}
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/* and back. */
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if (l & 1)
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*b2 = *b1e;
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}
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