arch/x86/kernel/promif/prom_exit.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #pragma ident   "%Z%%M% %I%     %E% SMI"
  27
  28 #include <sys/promif.h>
  29 #include <sys/consdev.h>
  30 #include <sys/promimpl.h>
  31 #include <sys/archsystm.h>
  32 #include <sys/reboot.h>
  33 #include <sys/kdi.h>
  34
  35 /*
  36  * The Intel cpu does not have an underlying monitor.
  37  * So, we do the best we can.....
  38  */
  39
  40 extern void prom_poll_enter(void);
  41
  42 extern cons_polledio_t *cons_polledio;
  43
  44 void
  45 prom_exit_to_mon(void)
  46 {
  47
  48 #if !defined(_KMDB)
  49         prom_poll_enter();
  50 #endif
  51 #ifdef I386BOOT
  52         prom_printf("[spinning forever]\n");
  53         for (;;)
  54                 continue;
  55 #else
  56 #if !defined(_KMDB)
  57         if (boothowto & RB_DEBUG)
  58                 kmdb_enter();
  59 #endif  /* !_KMDB */
  60         prom_reboot_prompt();
  61         prom_reboot(NULL);
  62 #endif  /* !I386BOOT */
  63 }
  64
  65 #if !defined(_KMDB)
  66 void
  67 prom_poll_enter(void)
  68 {
  69         if (cons_polledio != NULL) {
  70                 if (cons_polledio->cons_polledio_enter != NULL) {
  71                         cons_polledio->cons_polledio_enter(
  72                             cons_polledio->cons_polledio_argument);
  73                 }
  74         }
  75 }
  76 #endif