sys/arch/evbppc/virtex/consinit.c

   1 /*      $NetBSD: consinit.c,v 1.1.20.1 2007/05/28 20:01:42 freza Exp $ */
   2
   3 /*
   4  * Copyright (c) 2006 Jachym Holecek
   5  * All rights reserved.
   6  *
   7  * Written for DFC Design, s.r.o.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  *
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  23  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  25  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  29  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include "opt_cons.h"
  33 #include "xlcom.h"
  34
  35 #include <sys/cdefs.h>
  36 __KERNEL_RCSID(0, "$NetBSD: consinit.c,v 1.1.20.1 2007/05/28 20:01:42 freza Exp $");
  37
  38 #include <sys/param.h>
  39 #include <sys/systm.h>
  40 #include <sys/device.h>
  41
  42 #include <machine/bus.h>
  43
  44 #include <evbppc/virtex/virtex.h>
  45
  46 #include <dev/cons.h>
  47
  48
  49 #if NXLCOM > 0
  50 extern struct consdev   consdev_xlcom;
  51 void                    xlcom_cninit(struct consdev *, bus_addr_t);
  52 #if defined(KGDB)
  53 void                    xlcom_kgdbinit(void);
  54 #endif
  55 #endif
  56
  57 struct consdev          *cn_tab = NULL;
  58 bus_space_tag_t         consdev_iot;
  59 bus_space_handle_t      consdev_ioh;
  60
  61 #if defined(KGDB)
  62 bus_space_tag_t         kgdb_iot;
  63 bus_space_handle_t      kgdb_ioh;
  64 #endif
  65
  66
  67 /*
  68  * Initialize the system console (hmm, as if anyone can see those panics).
  69  */
  70 void
  71 consinit(void)
  72 {
  73         static int      initted = 0;
  74
  75         if (initted)
  76                 return;
  77
  78         /* Pick MD knowledge about console. */
  79         if (virtex_bus_space_tag(CONS_NAME, &consdev_iot))
  80                 panic("No bus space for %s console", CONS_NAME);
  81
  82 #if defined(KGDB)
  83         if (virtex_bus_space_tag(KGDB_NAME, &kgdb_iot))
  84                 panic("No bus space for %s kgdb", KGDB_NAME);
  85 #endif
  86
  87 #if NXLCOM > 0
  88 #if defined(KGDB)
  89         if (strncmp("xlcom", KGDB_NAME, 5)) {
  90                 xlcom_kgdbinit();
  91
  92                 /* Overtake console device, we're higher priority. */
  93                 if (strcmp(KGDB_NAME, CONS_NAME) == 0 &&
  94                     KGDB_ADDR == CONS_ADDR)
  95                         goto done;
  96         }
  97 #endif
  98         if (strncmp("xlcom", CONS_NAME, 5) == 0) {
  99                 cn_tab = &consdev_xlcom;
 100                 xlcom_cninit(cn_tab, CONS_ADDR);
 101
 102                 goto done;
 103         }
 104 #endif
 105
 106         panic("No console");    /* XXX really panic? */
 107  done:
 108         /* If kgdb overtook console, cn_tab is NULL and dev/cons.c deals. */
 109         initted = 1;
 110 }