2 * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
20 FILE_LICENCE ( GPL2_OR_LATER );
22 #include <ipxe/device.h>
23 #include <ipxe/console.h>
24 #include <ipxe/init.h>
28 * Initialisation, startup and shutdown routines
32 /** "startup() has been called" flag */
33 static int started = 0;
38 * This function performs the one-time-only and irreversible
39 * initialisation steps, such as initialising the heap. It must be
40 * called before (almost) any other function.
42 * There is, by definition, no counterpart to this function on the
45 void initialise ( void ) {
46 struct init_fn *init_fn;
48 /* Call registered initialisation functions */
49 for_each_table_entry ( init_fn, INIT_FNS )
50 init_fn->initialise ();
56 * This function performs the repeatable initialisation steps, such as
57 * probing devices. You may call startup() and shutdown() multiple
58 * times (as is done via the PXE API when PXENV_START_UNDI is used).
60 void startup ( void ) {
61 struct startup_fn *startup_fn;
66 /* Call registered startup functions */
67 for_each_table_entry ( startup_fn, STARTUP_FNS ) {
68 if ( startup_fn->startup )
69 startup_fn->startup();
78 * @v flags Shutdown behaviour flags
80 * This function reverses the actions of startup(), and leaves iPXE in
81 * a state ready to be removed from memory. You may call startup()
82 * again after calling shutdown().
84 * Call this function only once, before either exiting main() or
85 * starting up a non-returnable image.
87 void shutdown ( int flags ) {
88 struct startup_fn *startup_fn;
93 /* Call registered shutdown functions (in reverse order) */
94 for_each_table_entry_reverse ( startup_fn, STARTUP_FNS ) {
95 if ( startup_fn->shutdown )
96 startup_fn->shutdown ( flags );