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(__ASSEMBLY__)
  31 /*
  32  * Reset the watchdog timer, always returns 0
  33  *
  34  * This function is here since it is shared between board_f() and board_r(),
  35  * and the legacy arch/<arch>/board.c code.
  36  */
  37 int init_func_watchdog_reset(void);
  38 #endif
  39
  40 #ifdef CONFIG_WATCHDOG
  41 #define INIT_FUNC_WATCHDOG_INIT init_func_watchdog_init,
  42 #define INIT_FUNC_WATCHDOG_RESET        init_func_watchdog_reset,
  43 #else
  44 #define INIT_FUNC_WATCHDOG_INIT
  45 #define INIT_FUNC_WATCHDOG_RESET
  46 #endif
  47
  48 #if defined(CONFIG_HW_WATCHDOG) && defined(CONFIG_WATCHDOG)
  49 #  error "Configuration error: CONFIG_HW_WATCHDOG and CONFIG_WATCHDOG can't be used together."
  50 #endif
  51
  52 /*
  53  * Hardware watchdog
  54  */
  55 #ifdef CONFIG_HW_WATCHDOG
  56         #if defined(__ASSEMBLY__)
  57                 #define WATCHDOG_RESET bl hw_watchdog_reset
  58         #else
  59                 extern void hw_watchdog_reset(void);
  60
  61                 #define WATCHDOG_RESET hw_watchdog_reset
  62         #endif /* __ASSEMBLY__ */
  63 #else
  64         /*
  65          * Maybe a software watchdog?
  66          */
  67         #if defined(CONFIG_WATCHDOG)
  68                 #if defined(__ASSEMBLY__)
  69                         #define WATCHDOG_RESET bl watchdog_reset
  70                 #else
  71                         extern void watchdog_reset(void);
  72
  73                         #define WATCHDOG_RESET watchdog_reset
  74                 #endif
  75         #else
  76                 /*
  77                  * No hardware or software watchdog.
  78                  */
  79                 #if defined(__ASSEMBLY__)
  80                         #define WATCHDOG_RESET /*XXX DO_NOT_DEL_THIS_COMMENT*/
  81                 #else
  82                         #define WATCHDOG_RESET() {}
  83                 #endif /* __ASSEMBLY__ */
  84         #endif /* CONFIG_WATCHDOG && !__ASSEMBLY__ */
  85 #endif /* CONFIG_HW_WATCHDOG */
  86
  87 /*
  88  * Prototypes from $(CPU)/cpu.c.
  89  */
  90
  91 /* MPC 8xx */
  92 #if (defined(CONFIG_8xx) || defined(CONFIG_MPC860)) && !defined(__ASSEMBLY__)
  93         void reset_8xx_watchdog(volatile immap_t *immr);
  94 #endif
  95
  96 /* MPC 5xx */
  97 #if defined(CONFIG_5xx) && !defined(__ASSEMBLY__)
  98         void reset_5xx_watchdog(volatile immap_t *immr);
  99 #endif
 100
 101 /* MPC 5xxx */
 102 #if defined(CONFIG_MPC5xxx) && !defined(__ASSEMBLY__)
 103         void reset_5xxx_watchdog(void);
 104 #endif
 105
 106 /* AMCC 4xx */
 107 #if defined(CONFIG_4xx) && !defined(__ASSEMBLY__)
 108         void reset_4xx_watchdog(void);
 109 #endif
 110
 111 #if defined(CONFIG_HW_WATCHDOG) && !defined(__ASSEMBLY__)
 112         void hw_watchdog_init(void);
 113 #endif
 114 #endif /* _WATCHDOG_H_ */