include/watchdog.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * (C) Copyright 2001
   4  * Erik Theisen,  Wave 7 Optics, etheisen@mindspring.com.
   5  */
   6
   7 /*
   8  * Watchdog functions and macros.
   9  */
  10 #ifndef _WATCHDOG_H_
  11 #define _WATCHDOG_H_
  12
  13 #if !defined(__ASSEMBLY__)
  14 /*
  15  * Reset the watchdog timer, always returns 0
  16  *
  17  * This function is here since it is shared between board_f() and board_r(),
  18  * and the legacy arch/<arch>/board.c code.
  19  */
  20 int init_func_watchdog_reset(void);
  21 #endif
  22
  23 #if defined(CONFIG_WATCHDOG) || defined(CONFIG_HW_WATCHDOG)
  24 #define INIT_FUNC_WATCHDOG_INIT init_func_watchdog_init,
  25 #define INIT_FUNC_WATCHDOG_RESET        init_func_watchdog_reset,
  26 #else
  27 #define INIT_FUNC_WATCHDOG_INIT
  28 #define INIT_FUNC_WATCHDOG_RESET
  29 #endif
  30
  31 #if defined(CONFIG_HW_WATCHDOG) && defined(CONFIG_WATCHDOG)
  32 #  error "Configuration error: CONFIG_HW_WATCHDOG and CONFIG_WATCHDOG can't be used together."
  33 #endif
  34
  35 /*
  36  * Hardware watchdog
  37  */
  38 #ifdef CONFIG_HW_WATCHDOG
  39         #if defined(__ASSEMBLY__)
  40                 #define WATCHDOG_RESET bl hw_watchdog_reset
  41         #else
  42                 extern void hw_watchdog_reset(void);
  43
  44                 #define WATCHDOG_RESET hw_watchdog_reset
  45         #endif /* __ASSEMBLY__ */
  46 #else
  47         /*
  48          * Maybe a software watchdog?
  49          */
  50         #if defined(CONFIG_WATCHDOG)
  51                 #if defined(__ASSEMBLY__)
  52                         #define WATCHDOG_RESET bl watchdog_reset
  53                 #else
  54                         /* Don't require the watchdog to be enabled in SPL */
  55                         #if defined(CONFIG_SPL_BUILD) &&                \
  56                                 !defined(CONFIG_SPL_WATCHDOG_SUPPORT)
  57                                 #define WATCHDOG_RESET() {}
  58                         #else
  59                                 extern void watchdog_reset(void);
  60
  61                                 #define WATCHDOG_RESET watchdog_reset
  62                         #endif
  63                 #endif
  64         #else
  65                 /*
  66                  * No hardware or software watchdog.
  67                  */
  68                 #if defined(__ASSEMBLY__)
  69                         #define WATCHDOG_RESET /*XXX DO_NOT_DEL_THIS_COMMENT*/
  70                 #else
  71                         #define WATCHDOG_RESET() {}
  72                 #endif /* __ASSEMBLY__ */
  73         #endif /* CONFIG_WATCHDOG && !__ASSEMBLY__ */
  74 #endif /* CONFIG_HW_WATCHDOG */
  75
  76 /*
  77  * Prototypes from $(CPU)/cpu.c.
  78  */
  79
  80 #if defined(CONFIG_HW_WATCHDOG) && !defined(__ASSEMBLY__)
  81         void hw_watchdog_init(void);
  82 #endif
  83
  84 #if defined(CONFIG_MPC85xx) && !defined(__ASSEMBLY__)
  85         void init_85xx_watchdog(void);
  86 #endif
  87 #endif /* _WATCHDOG_H_ */