include/initcall.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * Copyright (c) 2011 The Chromium OS Authors.
   4  */
   5
   6 #ifndef __INITCALL_H
   7 #define __INITCALL_H
   8
   9 #include <asm/types.h>
  10 #include <event.h>
  11
  12 _Static_assert(EVT_COUNT < 256, "Can only support 256 event types with 8 bits");
  13
  14 /**
  15  * init_fnc_t - Init function
  16  *
  17  * Return: 0 if OK -ve on error
  18  */
  19 typedef int (*init_fnc_t)(void);
  20
  21 /* Top bit indicates that the initcall is an event */
  22 #define INITCALL_IS_EVENT       GENMASK(BITS_PER_LONG - 1, 8)
  23 #define INITCALL_EVENT_TYPE     GENMASK(7, 0)
  24
  25 #define INITCALL_EVENT(_type)   (void *)((_type) | INITCALL_IS_EVENT)
  26
  27 /**
  28  * initcall_run_list() - Run through a list of function calls
  29  *
  30  * This calls functions one after the other, stopping at the first error, or
  31  * when NULL is obtained.
  32  *
  33  * @init_sequence: NULL-terminated init sequence to run
  34  * Return: 0 if OK, or -ve error code from the first failure
  35  */
  36 int initcall_run_list(const init_fnc_t init_sequence[]);
  37
  38 #endif