293 lines
6.9 KiB
C
293 lines
6.9 KiB
C
/* $NetBSD: if_ie_sebuf.c,v 1.16 2008/06/28 12:13:38 tsutsui 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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*
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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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* as found on the Sun3/E SCSI/Ethernet board.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: if_ie_sebuf.c,v 1.16 2008/06/28 12:13:38 tsutsui Exp $");
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#include "opt_inet.h"
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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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#include "sereg.h"
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#include "sevar.h"
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static void ie_sebuf_reset(struct ie_softc *);
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static void ie_sebuf_attend(struct ie_softc *);
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static void ie_sebuf_run(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 *wmemcpy(void *, const void *, size_t);
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static void *wmemset(void *, int, size_t);
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/*
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* New-style autoconfig attachment
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*/
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static int ie_sebuf_match(device_t, cfdata_t, void *);
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static void ie_sebuf_attach(device_t, device_t, void *);
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CFATTACH_DECL_NEW(ie_sebuf, sizeof(struct ie_softc),
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ie_sebuf_match, ie_sebuf_attach, NULL, NULL);
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static int
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ie_sebuf_match(device_t parent, cfdata_t cf, void *args)
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{
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struct sebuf_attach_args *aa = args;
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/* Match by name. */
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if (strcmp(aa->name, "ie"))
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return 0;
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/* Anyting else to check? */
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return 1;
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}
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static void
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ie_sebuf_attach(device_t parent, device_t self, void *args)
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{
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struct ie_softc *sc = device_private(self);
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struct sebuf_attach_args *aa = args;
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volatile struct ie_regs *regs;
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int off;
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sc->sc_dev = self;
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sc->hard_type = IE_VME3E;
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sc->reset_586 = ie_sebuf_reset;
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sc->chan_attn = ie_sebuf_attend;
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sc->run_586 = ie_sebuf_run;
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sc->sc_memcpy = wmemcpy;
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sc->sc_memset = wmemset;
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/* Control regs mapped by parent. */
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sc->sc_reg = aa->regs;
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regs = (struct ie_regs *)sc->sc_reg;
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/*
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* On this hardware, the i82586 address zero
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* maps to the start of the board, which we
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* happen to know is 128K below (XXX).
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*/
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sc->sc_iobase = aa->buf - 0x20000;
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/*
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* There is 128K of memory for the i82586 on
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* the Sun3/E SCSI/Ethernet board, and the
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* "sebuf" driver has mapped it in for us.
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* (Fixed in hardware; NOT configurable!)
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*/
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if (aa->blen < SE_IEBUFSIZE)
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panic("ie_sebuf: bad size");
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sc->sc_msize = SE_IEBUFSIZE;
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sc->sc_maddr = aa->buf;
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/* Clear the memory. */
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(sc->sc_memset)(sc->sc_maddr, 0, sc->sc_msize);
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/*
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* XXX: Unfortunately, the common driver code
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* is not ready to deal with more than 64K of
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* memory, so skip the first 64K. Too bad.
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* Note: device needs the SCP at the end.
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*/
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sc->sc_msize -= 0x10000;
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sc->sc_maddr = (char *)sc->sc_maddr + 0x10000;
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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 17 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 *)((char *)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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/* Install interrupt handler. */
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regs->ie_ivec = aa->ca.ca_intvec;
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isr_add_vectored(ie_intr, sc, aa->ca.ca_intpri, aa->ca.ca_intvec);
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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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}
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/* Whack the "channel attetion" line. */
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void
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ie_sebuf_attend(struct ie_softc *sc)
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{
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volatile struct ie_regs *regs = (struct ie_regs *)sc->sc_reg;
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regs->ie_csr |= IE_CSR_ATTEN; /* flag! */
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regs->ie_csr &= ~IE_CSR_ATTEN; /* down. */
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}
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/*
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* This is called during driver attach.
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* Reset and initialize.
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*/
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void
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ie_sebuf_reset(struct ie_softc *sc)
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{
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volatile struct ie_regs *regs = (struct ie_regs *)sc->sc_reg;
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regs->ie_csr = IE_CSR_RESET;
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delay(20);
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regs->ie_csr = (IE_CSR_NOLOOP | IE_CSR_IENAB);
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}
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/*
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* This is called at the end of ieinit().
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* optional.
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*/
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void
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ie_sebuf_run(struct ie_softc *sc)
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{
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/* do it all in reset */
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}
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/*
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* wmemcpy/wmemset - like memcpy/memset 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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wmemset(void *vb, int val, size_t l)
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{
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uint8_t *b = vb;
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uint8_t *be = b + l;
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uint16_t *sp;
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if (l == 0)
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return vb;
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/* front, */
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if ((uint32_t)b & 1)
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*b++ = val;
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/* back, */
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if (b != be && ((uint32_t)be & 1) != 0) {
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be--;
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*be = val;
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}
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/* and middle. */
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sp = (uint16_t *)b;
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while (sp != (uint16_t *)be)
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*sp++ = val;
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return vb;
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}
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static void *
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wmemcpy(void *dst, const void *src, size_t l)
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{
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const uint8_t *b1e, *b1 = src;
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uint8_t *b2 = dst;
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const uint16_t *sp;
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int bstore = 0;
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if (l == 0)
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return dst;
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/* front, */
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if ((uint32_t)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 = (const uint16_t *)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 = (uint32_t)b2 & 1;
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while (sp < (const uint16_t *)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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*((uint16_t *)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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return dst;
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}
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