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1 #ifndef _GPXE_INIT_H
2 #define _GPXE_INIT_H
3 
4 FILE_LICENCE ( GPL2_OR_LATER );
5 
6 #include <gpxe/tables.h>
7 
8 /**
9  * An initialisation function
10  *
11  * Initialisation functions are called exactly once, as part of the
12  * call to initialise().
13  */
14 struct init_fn {
15 	void ( * initialise ) ( void );
16 };
17 
18 /** Initialisation function table */
19 #define INIT_FNS __table ( struct init_fn, "init_fns" )
20 
21 /** Declare an initialisation functon */
22 #define __init_fn( init_order ) __table_entry ( INIT_FNS, init_order )
23 
24 /** @defgroup initfn_order Initialisation function ordering
25  * @{
26  */
27 
28 #define INIT_EARLY	01	/**< Early initialisation */
29 #define INIT_SERIAL	02	/**< Serial driver initialisation */
30 #define	INIT_CONSOLE	03	/**< Console initialisation */
31 #define INIT_NORMAL	04	/**< Normal initialisation */
32 
33 /** @} */
34 
35 /** Shutdown flags */
36 enum shutdown_flags {
37 	/** Shutdown is in order to exit (return to gPXE's caller) */
38 	SHUTDOWN_EXIT = 0x0001,
39 	/** Shutdown is in order to boot an OS */
40 	SHUTDOWN_BOOT = 0x0002,
41 	/** Do not remove devices */
42 	SHUTDOWN_KEEP_DEVICES = 0x0004,
43 };
44 
45 /**
46  * A startup/shutdown function
47  *
48  * Startup and shutdown functions may be called multiple times, as
49  * part of the calls to startup() and shutdown().
50  */
51 struct startup_fn {
52 	void ( * startup ) ( void );
53 	void ( * shutdown ) ( int flags );
54 };
55 
56 /** Startup/shutdown function table */
57 #define STARTUP_FNS __table ( struct startup_fn, "startup_fns" )
58 
59 /** Declare a startup/shutdown function */
60 #define __startup_fn( startup_order ) \
61 	__table_entry ( STARTUP_FNS, startup_order )
62 
63 /** @defgroup startfn_order Startup/shutdown function ordering
64  *
65  * Shutdown functions are called in the reverse order to startup
66  * functions.
67  *
68  * @{
69  */
70 
71 #define STARTUP_EARLY	01	/**< Early startup */
72 #define STARTUP_NORMAL	02	/**< Normal startup */
73 #define STARTUP_LATE	03	/**< Late startup */
74 
75 /** @} */
76 
77 extern void initialise ( void );
78 extern void startup ( void );
79 extern void shutdown ( int flags );
80 
81 #endif /* _GPXE_INIT_H */
82