include/watchdog.h

   1 /*
   2  * (C) Copyright 2001
   3  * Erik Theisen,  Wave 7 Optics, etheisen@mindspring.com.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 /*
  25  * Watchdog functions and macros.
  26  */
  27 #ifndef _WATCHDOG_H_
  28 #define _WATCHDOG_H_
  29
  30 #if defined(CONFIG_HW_WATCHDOG) && defined(CONFIG_WATCHDOG)
  31 #  error "Configuration error: CONFIG_HW_WATCHDOG and CONFIG_WATCHDOG can't be used together."
  32 #endif
  33
  34 #if defined(__ASSEMBLY__) && defined(__NIOS__)
  35 #  error "Configuration error: WATCHDOG_RESET inside assembler not supported for Nios platforms."
  36 #endif
  37
  38 /*
  39  * Hardware watchdog
  40  */
  41 #ifdef CONFIG_HW_WATCHDOG
  42         #if defined(__ASSEMBLY__)
  43                 #define WATCHDOG_RESET bl hw_watchdog_reset
  44         #else
  45                 extern void hw_watchdog_reset(void);
  46
  47                 #define WATCHDOG_RESET hw_watchdog_reset
  48         #endif /* __ASSEMBLY__ */
  49 #else
  50         /*
  51          * Maybe a software watchdog?
  52          */
  53         #if defined(CONFIG_WATCHDOG)
  54                 #if defined(__ASSEMBLY__)
  55                         #define WATCHDOG_RESET bl watchdog_reset
  56                 #else
  57                         extern void watchdog_reset(void);
  58
  59                         #define WATCHDOG_RESET watchdog_reset
  60                 #endif
  61         #else
  62                 /*
  63                  * No hardware or software watchdog.
  64                  */
  65                 #if defined(__ASSEMBLY__)
  66                         #define WATCHDOG_RESET /*XXX DO_NOT_DEL_THIS_COMMENT*/
  67                 #else
  68                         #define WATCHDOG_RESET() {}
  69                 #endif /* __ASSEMBLY__ */
  70         #endif /* CONFIG_WATCHDOG && !__ASSEMBLY__ */
  71 #endif /* CONFIG_HW_WATCHDOG */
  72
  73 /*
  74  * Prototypes from $(CPU)/cpu.c.
  75  */
  76
  77 /* MPC 8xx */
  78 #if (defined(CONFIG_8xx) || defined(CONFIG_MPC860)) && !defined(__ASSEMBLY__)
  79         void reset_8xx_watchdog(volatile immap_t *immr);
  80 #endif
  81
  82 /* MPC 5xx */
  83 #if defined(CONFIG_5xx) && !defined(__ASSEMBLY__)
  84         void reset_5xx_watchdog(volatile immap_t *immr);
  85 #endif
  86
  87 /* AMCC 4xx */
  88 #if defined(CONFIG_4xx) && !defined(__ASSEMBLY__)
  89         void reset_4xx_watchdog(void);
  90 #endif
  91
  92 #endif /* _WATCHDOG_H_ */