kernel/fiasco/src/kern/static_init.h

   1 /* -*- c++ -*- */
   2
   3 #include "initcalls.h"
   4
   5 /**
   6  * definitions for static, pre-main initialization stuff
   7  */
   8 #ifndef STATIC_INIT_H
   9 #define STATIC_INIT_H
  10
  11 /// Priorities for ordered static initialization
  12 //@{
  13
  14 #define DEPENDS_ON(SUBSYS)      ((SUBSYS) + 2)
  15
  16 #define LINKER_INTERNAL          100            // linker internal use
  17 #define UX_STARTUP1_INIT_PRIO    DEPENDS_ON(LINKER_INTERNAL)
  18 #define EARLY_INIT_PRIO          DEPENDS_ON(UX_STARTUP1_INIT_PRIO)
  19 #define STARTUP1_INIT_PRIO       DEPENDS_ON(EARLY_INIT_PRIO)
  20 // at this stage spinlocks must be working
  21 #define ROOT_FACTORY_INIT_PRIO   DEPENDS_ON(STARTUP1_INIT_PRIO)
  22 #define BOOT_CONSOLE_INIT_PRIO   DEPENDS_ON(ROOT_FACTORY_INIT_PRIO)
  23 #define GDB_INIT_PRIO            DEPENDS_ON(BOOT_CONSOLE_INIT_PRIO)
  24 #define UART_INIT_PRIO           DEPENDS_ON(BOOT_CONSOLE_INIT_PRIO)
  25 #define STARTUP_INIT_PRIO        DEPENDS_ON(GDB_INIT_PRIO)
  26 #define CPU_LOCAL_BASE_INIT_PRIO DEPENDS_ON(STARTUP_INIT_PRIO)
  27 #define CPU_LOCAL_INIT_PRIO      DEPENDS_ON(CPU_LOCAL_BASE_INIT_PRIO)
  28 #define POST_CPU_LOCAL_INIT_PRIO DEPENDS_ON(CPU_LOCAL_INIT_PRIO)
  29 #define PERF_CNT_INIT_PRIO       DEPENDS_ON(POST_CPU_LOCAL_INIT_PRIO)
  30 #define JDB_CATEGORY_INIT_PRIO   DEPENDS_ON(POST_CPU_LOCAL_INIT_PRIO)
  31 #define JDB_MODULE_INIT_PRIO     DEPENDS_ON(JDB_CATEGORY_INIT_PRIO)
  32
  33 #define WATCHDOG_INIT            DEPENDS_ON(PERF_CNT_INIT_PRIO)
  34 #define KDB_INIT_PRIO            DEPENDS_ON(JDB_MODULE_INIT_PRIO)
  35 #define JDB_INIT_PRIO            DEPENDS_ON(KDB_INIT_PRIO)
  36
  37 #define INIT_PRIORITY(a) __attribute__((init_priority(a)))
  38
  39 //@}
  40
  41
  42
  43 /* ATTENTION: WARNING: DON'T READ ANY FURTHER !!! */
  44 /*  The following definitions are likely to cause */
  45 /*  extreme and irreparable BRAIN DAMAGE.         */
  46 /*  (I already tested this on my unsuspecting    */
  47 /*   colleagues)                                  */
  48
  49 /**
  50  * \defgroup Magic static initializer macros
  51  */
  52 //@{
  53 #define __STATIC_INITIALIZER(_func, va) \
  54 class static_init_##va { \
  55 public: \
  56   static_init_##va() FIASCO_INIT; \
  57 };\
  58 static_init_##va::static_init_##va() { \
  59   _func(); \
  60 } \
  61 static static_init_##va __static_construction_of_##va##__
  62
  63 #define __STATIC_INITIALIZER_P(_func, va, prio) \
  64 class static_init_##va { \
  65 public: \
  66   static_init_##va() FIASCO_INIT; \
  67 };\
  68 static_init_##va::static_init_##va() { \
  69   _func(); \
  70 } \
  71 static static_init_##va __static_construction_of_##va##__ \
  72   __attribute__((init_priority(prio)))
  73 //@}
  74
  75
  76
  77 /**
  78  * \defgroup Macros to define static init functions
  79  */
  80 //@{
  81
  82 /// mark f as static initializer with priority p
  83 #define STATIC_INITIALIZER_P(f, p) \
  84   __STATIC_INITIALIZER_P(f,func_##f,p)
  85
  86 /// mark f as static initailizer
  87 #define STATIC_INITIALIZER(f) \
  88   __STATIC_INITIALIZER(f,func_##f)
  89 //@}
  90
  91
  92 /// static initialization of singleton (static) classes
  93 /**
  94  * The classes that should be initialized must provide
  95  * a init() member function that takes no arguments.
  96  */
  97 //@{
  98
  99 /** mark class c to be statically initialized via its init
 100  *  function and with priority p
 101  */
 102 #define STATIC_INITIALIZE_P(c,p) \
 103   __STATIC_INITIALIZER_P(c::init, class_##c,p)
 104
 105 /// mark class c to be statically initialized via its init function
 106 #define STATIC_INITIALIZE(c) \
 107   __STATIC_INITIALIZER(c::init, class_##c)
 108
 109 /** mark class c to be statically initialized via its init
 110  *  function and with priority p
 111  */
 112 #define STATIC_INITIALIZEX_P(c,func,p) \
 113   __STATIC_INITIALIZER_P(c::func, class_##c##_##func,p)
 114
 115 /// mark class c to be statically initialized via its init function
 116 #define STATIC_INITIALIZEX(c,func) \
 117   __STATIC_INITIALIZER(c::func, class_##c##_##func)
 118 //@}
 119
 120
 121
 122 #endif // __STATIC_INIT_H__