include/watchdog.h

   1 /*
   2  * (C) Copyright 2001
   3  * Erik Theisen,  Wave 7 Optics, etheisen@mindspring.com.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 /*
   9  * Watchdog functions and macros.
  10  */
  11 #ifndef _WATCHDOG_H_
  12 #define _WATCHDOG_H_
  13
  14 #if !defined(__ASSEMBLY__)
  15 /*
  16  * Reset the watchdog timer, always returns 0
  17  *
  18  * This function is here since it is shared between board_f() and board_r(),
  19  * and the legacy arch/<arch>/board.c code.
  20  */
  21 int init_func_watchdog_reset(void);
  22 #endif
  23
  24 #if defined(CONFIG_WATCHDOG) || defined(CONFIG_HW_WATCHDOG)
  25 #define INIT_FUNC_WATCHDOG_INIT init_func_watchdog_init,
  26 #define INIT_FUNC_WATCHDOG_RESET        init_func_watchdog_reset,
  27 #else
  28 #define INIT_FUNC_WATCHDOG_INIT
  29 #define INIT_FUNC_WATCHDOG_RESET
  30 #endif
  31
  32 #if defined(CONFIG_HW_WATCHDOG) && defined(CONFIG_WATCHDOG)
  33 #  error "Configuration error: CONFIG_HW_WATCHDOG and CONFIG_WATCHDOG can't be used together."
  34 #endif
  35
  36 /*
  37  * Hardware watchdog
  38  */
  39 #ifdef CONFIG_HW_WATCHDOG
  40         #if defined(__ASSEMBLY__)
  41                 #define WATCHDOG_RESET bl hw_watchdog_reset
  42         #else
  43                 extern void hw_watchdog_reset(void);
  44
  45                 #define WATCHDOG_RESET hw_watchdog_reset
  46         #endif /* __ASSEMBLY__ */
  47 #else
  48         /*
  49          * Maybe a software watchdog?
  50          */
  51         #if defined(CONFIG_WATCHDOG)
  52                 #if defined(__ASSEMBLY__)
  53                         #define WATCHDOG_RESET bl watchdog_reset
  54                 #else
  55                         extern void watchdog_reset(void);
  56
  57                         #define WATCHDOG_RESET watchdog_reset
  58                 #endif
  59         #else
  60                 /*
  61                  * No hardware or software watchdog.
  62                  */
  63                 #if defined(__ASSEMBLY__)
  64                         #define WATCHDOG_RESET /*XXX DO_NOT_DEL_THIS_COMMENT*/
  65                 #else
  66                         #define WATCHDOG_RESET() {}
  67                 #endif /* __ASSEMBLY__ */
  68         #endif /* CONFIG_WATCHDOG && !__ASSEMBLY__ */
  69 #endif /* CONFIG_HW_WATCHDOG */
  70
  71 /*
  72  * Prototypes from $(CPU)/cpu.c.
  73  */
  74
  75 #if defined(CONFIG_HW_WATCHDOG) && !defined(__ASSEMBLY__)
  76         void hw_watchdog_init(void);
  77 #endif
  78
  79 #if defined(CONFIG_MPC85xx) && !defined(__ASSEMBLY__)
  80         void init_85xx_watchdog(void);
  81 #endif
  82 #endif /* _WATCHDOG_H_ */