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@@ -3,36 +3,57 @@
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#include <gpxe/tables.h>
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/*
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* In order to avoid having objects dragged in just because main()
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* calls their initialisation function, we allow each object to
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* specify that it has a function that must be called to initialise
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* that object. The function call_init_fns() will call all the
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* included objects' initialisation functions.
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/**
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* An initialisation function
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*
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* Objects that require initialisation should include init.h and
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* register the initialisation function using INIT_FN().
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*
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* Objects may register up to three functions: init, reset and exit.
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* init gets called only once, at the point that Etherboot is
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* initialised (before the call to main()). reset gets called between
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* each boot attempt. exit gets called only once, just before the
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* loaded OS starts up (or just before Etherboot exits, if it exits,
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* or when the PXE NBP calls UNDI_SHUTDOWN, if it's a PXE NBP).
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*
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* The syntax is:
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* INIT_FN ( init_order, init_function, reset_function, exit_function );
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* where init_order is an ordering taken from the list below. Any
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* function may be left as NULL.
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* Initialisation functions are called exactly once, as part of the
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* call to initialise().
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*/
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struct init_fn {
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void ( * initialise ) ( void );
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};
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/** Declare an initialisation functon */
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#define __init_fn( init_order ) \
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__table ( struct init_fn, init_fns, init_order )
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/** @defgroup initfn_order Initialisation function ordering
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* @{
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*/
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/* An entry in the initialisation function table */
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#define INIT_EARLY 01 /**< Early initialisation */
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#define INIT_NORMAL 02 /**< Normal initialisation */
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struct init_fn {
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void ( *init ) ( void );
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void ( *exit ) ( void );
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/** @} */
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/**
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* A startup/shutdown function
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*
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* Startup and shutdown functions may be called multiple times, as
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* part of the calls to startup() and shutdown().
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*/
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struct startup_fn {
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void ( * startup ) ( void );
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void ( * shutdown ) ( void );
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};
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/** Declare a startup/shutdown function */
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#define __startup_fn( startup_order ) \
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__table ( struct startup_fn, startup_fns, startup_order )
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/** @defgroup startfn_order Startup/shutdown function ordering
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*
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* Shutdown functions are called in the reverse order to startup
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* functions.
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*
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* @{
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*/
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#define STARTUP_EARLY 01 /**< Early startup */
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#define STARTUP_NORMAL 02 /**< Normal startup */
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/** @} */
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/* Use double digits to avoid problems with "10" < "9" on alphabetic sort */
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#define INIT_CONSOLE 02
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#define INIT_GDBSYM 03
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@@ -40,19 +61,9 @@ struct init_fn {
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#define INIT_TIMERS 05
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#define INIT_LOADBUF 08
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#define INIT_PCMCIA 09
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#define INIT_RPC 11
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/* Macro for creating an initialisation function table entry */
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#define INIT_FN( init_order, init_func, exit_func ) \
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struct init_fn PREFIX_OBJECT(init_fn__) \
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__table ( struct init_fn, init_fn, init_order ) = { \
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.init = init_func, \
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.exit = exit_func, \
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};
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/* Function prototypes */
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void call_init_fns ( void );
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void call_exit_fns ( void );
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extern void initialise ( void );
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extern void startup ( void );
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extern void shutdown ( void );
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#endif /* _GPXE_INIT_H */
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