687 lines
15 KiB
C
687 lines
15 KiB
C
/* $NetBSD: a12dc.c,v 1.5 2001/05/30 15:24:26 lukem Exp $ */
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/* [Notice revision 2.2]
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* Copyright (c) 1997, 1998 Avalon Computer Systems, Inc.
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* All rights reserved.
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*
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* Author: Ross Harvey
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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 and
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* author 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. Neither the name of Avalon Computer Systems, Inc. nor the names of
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* its 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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* 4. This copyright will be assigned to The NetBSD Foundation on
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* 1/1/2000 unless these terms (including possibly the assignment
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* date) are updated in writing by Avalon prior to the latest specified
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* assignment date.
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*
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* THIS SOFTWARE IS PROVIDED BY AVALON COMPUTER SYSTEMS, 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 AVALON OR THE 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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* The A12 uses what DEC calls a "detached console", i.e., some of the console
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* implementation is on a dedicated processor with its own RAM.
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*
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* The A12 Detached Console interface uses two 16 bit registers (per CPU), one
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* going from the CPU to the a12ctrl processor and one going back the other
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* way. The first is polled, the second produces a GInt.
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*
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* In the very early days we loaded program images through this interface.
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*
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* Consequently, it developed an overly complicated (but sort of fast)
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* inverting sync/ack that isn't needed at all for its present application as
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* a text console device.
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*
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* One possible solution: most of the channels are undefined, so a console
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* channel using a stateless ack could be defined, with corresponding changes
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* to the backplane 68360 code.
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*
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* This file is complicated somewhat by its use in three different kernels:
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* NetBSD, the A12 CPU-resident console, and the a12ctrl backplane processor.
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* (The protocol is symmetrical.)
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*/
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#include "opt_avalon_a12.h" /* Config options headers */
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#include "opt_kgdb.h"
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#ifndef BSIDE
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#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
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__KERNEL_RCSID(0, "$NetBSD: a12dc.c,v 1.5 2001/05/30 15:24:26 lukem Exp $");
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/tty.h>
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#include <sys/proc.h>
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#include <sys/user.h>
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#include <sys/uio.h>
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#include <sys/device.h>
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#include <dev/cons.h>
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#include <machine/conf.h>
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#include <machine/autoconf.h>
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#include <machine/rpb.h>
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#include <alpha/pci/a12creg.h>
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#include <alpha/pci/a12cvar.h>
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#include <alpha/pci/pci_a12.h>
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#include "a12dcreg.h"
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#define A12DC() /* Generate ctags(1) key */
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#define MAX_MODULES 1
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int a12dcmatch __P((struct device *, struct cfdata *, void *));
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void a12dcattach __P((struct device *, struct device *, void *));
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struct a12dc_softc {
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struct device sc_dev;
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} a12dc_softc;
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struct cfattach a12dc_ca = {
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sizeof(struct a12dc_softc), a12dcmatch, a12dcattach,
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};
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extern struct cfdriver a12dc_cd;
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int a12dcfound; /* There Can Be Only One. */
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struct a12dc_config { int im_not_used; } a12dc_configuration;
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static struct tty *a12dc_tty[1];
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void a12dcstart __P((struct tty *));
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void a12dctimeout __P((void *));
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int a12dcparam __P((struct tty *, struct termios *));
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void a12dc_init(struct a12dc_config *, int);
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static void a12cdrputc __P((int));
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int a12dccngetc(dev_t);
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void a12dccnputc(dev_t, int);
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void a12dccnpollc(dev_t, int);
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/* static int get_bc_char(int mn, int chan); */
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/* static int get_bc_any(int,int *,int *); */
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int a12dcintr __P((void *));
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static void a12_worry(int worry_number);
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static void A12InitBackDriver(int);
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int
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a12dcmatch(parent, match, aux)
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struct device *parent;
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struct cfdata *match;
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void *aux;
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{
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struct pcibus_attach_args *pba = aux;
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return cputype == ST_AVALON_A12
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&& strcmp(pba->pba_busname, a12dc_cd.cd_name) == 0
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&& !a12dcfound;
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}
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void
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a12dcattach(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 tty *tp;
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struct a12dc_config *ccp;
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/* note that we've attached the chipset; can't have 2 A12Cs. */
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a12dcfound = 1;
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printf(": driver %s\n", "$Revision: 1.5 $");
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tp = a12dc_tty[0] = ttymalloc();
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tp->t_oproc = a12dcstart;
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tp->t_param = a12dcparam;
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tty_attach(tp);
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ccp = &a12dc_configuration;
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a12dc_init(ccp, 1);
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}
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void
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a12dc_init(ccp, mallocsafe)
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struct a12dc_config *ccp;
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int mallocsafe;
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{
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}
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/*
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* XXX definitions specific to only one of the kernels will be moved into
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* kernel-local include files. (One of these days.)
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*/
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#define spla12dc() spltty()
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#define a12yield()
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#define CDRADDR(m) ((mmreg_t *)(REGADDR(A12_CDR))) /* ignore m */
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#define modenormal()
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#define mb() alpha_mb()
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#define wmb() alpha_wmb()
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#else
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#include "product.def"
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#include "ghs.h"
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#include "a12ctrl.h"
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#define wmb()
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#define mb()
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#define swpipl(a) (a)
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#define splx(a) (a)
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#define spla12dc()
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#define hrhpanic(s,v) panic((s))
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#define CDRADDR(m) ((mmreg_t *)(A12_BACKPLANE+(m)))
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#endif
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static int msgetput __P((register mstate_type *, int, int));
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static void checkinit __P((void));
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static void
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A12InitBackDriver(int m)
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{
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/*
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* XXX memset() would be good here, but there is a (temporary) reason
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* for all this right now
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*/
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a12_mstate[m].xcdr = CDRADDR(m);
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a12_mstate[m].txrdy_out = A12C_TXRDY;
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a12_mstate[m].txrdy_in = A12C_TXRDY;
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a12_mstate[m].txack_out = A12C_TXACK;
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a12_mstate[m].txack_in = A12C_TXACK;
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a12_mstate[m].txsv = tx_idle;
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a12_mstate[m].rxsv = rx_idle;
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a12_mstate[m].reset_scanner= 1;
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a12_mstate[m].reset_loader = 1;
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a12_mstate[m].up = 1;
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a12_mstate[m].lastr = 0; /* last char. received */
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a12_mstate[m].lastrc = 0; /* last received channel */
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a12_mstate[m].rx_busy_wait = 0; /* last received busy ticks */
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a12_mstate[m].rx_busy_cnt = 0; /* last received start clock */
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a12_mstate[m].lastt = 0; /* last char. trasmitted */
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a12_mstate[m].lasttc = 0; /* last transmit channel */
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a12_mstate[m].tx_busy_wait = 0; /* last transmitted busy ticks */
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a12_mstate[m].tx_busy_cnt = 0; /* last transmitted start clock */
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a12_mstate[m].tbytes = 0;
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a12_mstate[m].tblkbytes = 0;
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a12_mstate[m].tblks = 0;
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a12_mstate[m].blwobe = 0;
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a12_mstate[m].blwbe = 0;
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a12_mstate[m].max_blkretry = 0;
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a12_mstate[m].max_blktime = 0;
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a12_mstate[m].max_blktimesz = 0;
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a12_mstate[m].avg_blksz = 0;
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a12_mstate[m].avg_blktime = 0;
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a12_mstate[m].retry_time = 0;
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}
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static void
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checkinit()
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{
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static int did_init;
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if (!did_init) {
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A12InitBackDriver(0);
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did_init = 1;
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}
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}
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int
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a12dcopen(dev, flag, mode, p)
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dev_t dev;
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int flag, mode;
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struct proc *p;
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{
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int unit = minor(dev);
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struct tty *tp;
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int s;
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if (unit >= 1)
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return ENXIO;
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#ifdef KGDB
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if (flags & COM_HW_KGDB)
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return EBUSY;
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#endif
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if (!a12dc_tty[unit]) {
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tp = a12dc_tty[unit] = ttymalloc();
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tty_attach(tp);
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} else
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tp = a12dc_tty[unit];
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if ((tp->t_state & TS_ISOPEN) &&
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(tp->t_state & TS_XCLUDE) &&
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p->p_ucred->cr_uid != 0)
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return EBUSY;
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s = spltty();
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tp->t_oproc = a12dcstart;
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tp->t_param = a12dcparam;
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tp->t_dev = dev;
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if ((tp->t_state & TS_ISOPEN) == 0) {
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tp->t_state |= TS_CARR_ON;
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ttychars(tp);
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tp->t_iflag = TTYDEF_IFLAG;
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tp->t_oflag = TTYDEF_OFLAG;
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tp->t_cflag = TTYDEF_CFLAG|CLOCAL;
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tp->t_lflag = TTYDEF_LFLAG;
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tp->t_ispeed = tp->t_ospeed = 9600;
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ttsetwater(tp);
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/* XXX XXX XXX
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a12_intr_register_icw(a12dcintr);
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*/
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} else if (tp->t_state&TS_XCLUDE && p->p_ucred->cr_uid != 0) {
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splx(s);
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return EBUSY;
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}
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splx(s);
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return (*tp->t_linesw->l_open)(dev, tp);
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}
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int
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a12dcclose(dev, flag, mode, p)
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dev_t dev;
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int flag, mode;
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struct proc *p;
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{
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int unit = minor(dev);
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struct tty *tp = a12dc_tty[unit];
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(*tp->t_linesw->l_close)(tp, flag);
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ttyclose(tp);
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return 0;
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}
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int
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a12dcread(dev, uio, flag)
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dev_t dev;
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struct uio *uio;
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int flag;
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{
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struct tty *tp = a12dc_tty[minor(dev)];
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return ((*tp->t_linesw->l_read)(tp, uio, flag));
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}
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int
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a12dcwrite(dev, uio, flag)
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dev_t dev;
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struct uio *uio;
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int flag;
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{
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struct tty *tp = a12dc_tty[minor(dev)];
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return ((*tp->t_linesw->l_write)(tp, uio, flag));
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}
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int
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a12dcpoll(dev, events, p)
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dev_t dev;
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int events;
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struct proc *p;
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{
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struct tty *tp = a12dc_tty[minor(dev)];
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return ((*tp->t_linesw->l_poll)(tp, events, p));
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}
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int
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a12dcioctl(dev, cmd, data, flag, p)
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dev_t dev;
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u_long cmd;
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caddr_t data;
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int flag;
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struct proc *p;
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{
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int unit = minor(dev);
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struct tty *tp = a12dc_tty[unit];
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int error;
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error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p);
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if (error >= 0)
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return error;
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error = ttioctl(tp, cmd, data, flag, p);
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if (error >= 0)
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return error;
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return ENOTTY;
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}
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int
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a12dcparam(tp, t)
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struct tty *tp;
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struct termios *t;
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{
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return 0;
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}
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void
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a12dcstart(tp)
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struct tty *tp;
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{
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int s;
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s = spltty();
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if (tp->t_state & (TS_TTSTOP | TS_BUSY))
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goto out;
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if (tp->t_outq.c_cc <= tp->t_lowat) {
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if (tp->t_state & TS_ASLEEP) {
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tp->t_state &= ~TS_ASLEEP;
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wakeup((caddr_t)&tp->t_outq);
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}
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selwakeup(&tp->t_wsel);
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}
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tp->t_state |= TS_BUSY;
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while (tp->t_outq.c_cc != 0)
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a12dccnputc(tp->t_dev, getc(&tp->t_outq));
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tp->t_state &= ~TS_BUSY;
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out:
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splx(s);
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}
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/*
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* Stop output on a line.
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*/
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void
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a12dcstop(tp, flag)
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struct tty *tp;
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{
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int s;
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s = spltty();
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if (tp->t_state & TS_BUSY)
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if ((tp->t_state & TS_TTSTOP) == 0)
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tp->t_state |= TS_FLUSH;
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splx(s);
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}
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int
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a12dcintr(v)
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void *v;
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{
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#if 1
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DIE();
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#else
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struct tty *tp = v;
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u_char c;
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while (a12dccnlookc(tp->t_dev, &c)) {
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if (tp->t_state & TS_ISOPEN)
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(*tp->t_linesw->l_rint)(c, tp);
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}
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#endif
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}
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struct tty *
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a12dctty(dev)
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dev_t dev;
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{
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if (minor(dev) != 0)
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panic("a12dctty: bogus");
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return a12dc_tty[0];
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}
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int
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a12dccnattach()
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{
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int i;
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static struct consdev a12dccons = {
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NULL, NULL, a12dccngetc, a12dccnputc, a12dccnpollc, NULL,
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NODEV, CN_NORMAL
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};
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for(i = 0; i < nchrdev; ++i)
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if (cdevsw[i].d_open == a12dcopen)
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a12dccons.cn_dev = makedev(i, 0);
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cn_tab = &a12dccons;
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return 0;
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}
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int
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a12dccngetc(dev)
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dev_t dev;
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{
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for(;;)
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continue;
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}
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void
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a12dccnputc(dev, c)
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dev_t dev;
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int c;
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{
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a12cdrputc(c);
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}
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void
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a12dccnpollc(dev, on)
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dev_t dev;
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int on;
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{
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}
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static void
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a12cdrputc(int c)
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{
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int s = spla12dc();
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checkinit();
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while(msgetput(MSP(0),CHANNEL_MONITOR,c)) {
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/*if(check_cdr_ok)
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check_cdr();*/
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DELAY(100);
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}
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splx(s);
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}
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#if 0
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static void
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check_cdr()
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{
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int bpchar,cnumber;
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static int srom_word_address,
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kmsg;
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int push_check_ok;
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int ipl;
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if(!get_bc_any(0,&bpchar,&cnumber))
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return;
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switch(cnumber) {
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default:
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printf("Unknown cdr channel %d",cnumber);
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break;
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case CHANNEL_KDATA:
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if(!kmsg)
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printf("Ignoring new kernel\n");;
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kmsg = 1;
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break;
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case CHANNEL_KMARK:
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kmsg = 0;
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break;
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#ifndef _KERNEL /* NetBSD kernel, that is. "if defined: rtmon kernel" */
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case CHANNEL_SROM_A:
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srom_word_address = bpchar;
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break;
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case CHANNEL_SROM_D:
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push_check_ok = check_cdr_ok;
|
|
check_cdr_ok = 0;
|
|
ipl = swpipl(7);
|
|
write_ethernet_srom(srom_word_address,bpchar);
|
|
++srom_word_address;
|
|
(void)swpipl(ipl);
|
|
check_cdr_ok = push_check_ok;
|
|
break;
|
|
|
|
case CHANNEL_MULTI:
|
|
logmchar(bpchar,"<");
|
|
SerialByteReceived(bpchar);
|
|
break;
|
|
case CHANNEL_MONITOR:
|
|
if (bpchar == CPX_PANIC)
|
|
/* TJF - Could kill all processes and then panic? */
|
|
hrhpanic("Panic in cooperating CPU.",0);
|
|
else cpxchar(bpchar);
|
|
break;
|
|
#endif
|
|
case CHANNEL_CONSOLE:
|
|
#ifdef A12CON /* XXX this can be done much better */
|
|
virtual_keyboard_byte(bpchar);
|
|
#else
|
|
ipl7putc(bpchar);
|
|
#endif
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#if 0
|
|
static int
|
|
get_bc_any(int mn, int *c, int *chan) {
|
|
mstate_type *ms = &a12_mstate[mn];
|
|
|
|
(void)mcgetput(mn, 0, -1);
|
|
if(ms->rxsv==rx_busy) {
|
|
*c = ms->c2b_char & 0xff;
|
|
*chan = ms->c2b_channel;
|
|
ms->rxsv = rx_idle;
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
get_bc_char(int mn, int chan) {
|
|
int newc,newchan;
|
|
|
|
if(get_bc_any(mn,&newc,&newchan)) {
|
|
if(newchan!=chan)
|
|
printf("receiver busy on dumb channel %d", newchan);
|
|
return newc;
|
|
}
|
|
return -1;
|
|
}
|
|
#endif
|
|
|
|
static int
|
|
msgetput(register mstate_type *ms, int channel, int c)
|
|
{
|
|
int i,t;
|
|
int ipl;
|
|
|
|
if(c==-2 || ms->up==0) {
|
|
if(c!=-2)
|
|
a12_worry(10);
|
|
ms->txsv = tx_idle;
|
|
ms->rxsv = rx_idle;
|
|
ms->cdr = 0;
|
|
return 0;
|
|
}
|
|
if(!(0<=channel && channel<64)) {
|
|
a12_worry(7);
|
|
return 0;
|
|
}
|
|
ipl = spla12dc();
|
|
for(i=0; i<20; ++i) {
|
|
switch(ms->txsv) {
|
|
case tx_idle:
|
|
if(c!=-1) {
|
|
ms->lastt = c;
|
|
ms->lasttc = channel;
|
|
ms->cdr = (ms->cdr & (A12C_TXACK | A12C_TXRDY))
|
|
| channel<<8
|
|
| c;
|
|
*ms->xcdr = ms->cdr;
|
|
wmb();
|
|
ms->cdr = ((ms->cdr & A12C_TXACK) &~ A12C_TXRDY)
|
|
| ms->txrdy_out
|
|
| channel<<8
|
|
| c;
|
|
*ms->xcdr = ms->cdr;
|
|
wmb();
|
|
ms->txsv = tx_braaw;
|
|
c = -1;
|
|
continue;
|
|
}
|
|
break;
|
|
case tx_braaw:
|
|
mb();
|
|
if((*ms->xcdr & A12C_TXACK)==ms->txack_in) {
|
|
ms->txrdy_out ^= A12C_TXRDY;
|
|
ms->txack_in ^= A12C_TXACK;
|
|
ms->txsv = tx_idle;
|
|
ms->tbytes++;
|
|
continue;
|
|
}
|
|
break;
|
|
default:
|
|
(void)splx(ipl);
|
|
a12_worry(5);
|
|
return 0;
|
|
}
|
|
switch(ms->rxsv) {
|
|
case rx_idle:
|
|
mb();
|
|
t = *ms->xcdr;
|
|
if((t & A12C_TXRDY)==ms->txrdy_in) {
|
|
ms->cdr = (ms->cdr & ~A12C_TXACK)
|
|
| ms->txack_out;
|
|
*ms->xcdr = ms->cdr;
|
|
wmb();
|
|
ms->c2b_char = t & 0xff;
|
|
ms->lastr = ms->c2b_char;
|
|
ms->c2b_channel = (t & CHMASK) >> 8;
|
|
ms->lastrc = ms->c2b_channel;
|
|
ms->txrdy_in ^= A12C_TXRDY;
|
|
ms->txack_out^= A12C_TXACK;
|
|
ms->rxsv = rx_busy;
|
|
continue;
|
|
}
|
|
break;
|
|
case rx_busy:
|
|
break;
|
|
default:
|
|
(void)splx(ipl);
|
|
a12_worry(6);
|
|
return 0;
|
|
}
|
|
if(c==-1)
|
|
break;
|
|
}
|
|
(void)splx(ipl);
|
|
return c!=-1;
|
|
}
|
|
|
|
static void
|
|
a12_worry(int worry_number)
|
|
{
|
|
a12console_last_unexpected_error = worry_number;
|
|
}
|