mirror of https://github.com/ipxe/ipxe.git
119 lines
3.1 KiB
C
119 lines
3.1 KiB
C
/*
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* Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*
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* You can also choose to distribute this program under the terms of
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* the Unmodified Binary Distribution Licence (as given in the file
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* COPYING.UBDL), provided that you have satisfied its requirements.
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*/
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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#include <ipxe/device.h>
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#include <ipxe/console.h>
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#include <ipxe/init.h>
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/** @file
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*
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* Initialisation, startup and shutdown routines
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*
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*/
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/** "startup() has been called" flag */
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static int started = 0;
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/** Colour for debug messages */
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#define colour table_start ( INIT_FNS )
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/**
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* Initialise iPXE
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*
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* This function performs the one-time-only and irreversible
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* initialisation steps, such as initialising the heap. It must be
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* called before (almost) any other function.
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*
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* There is, by definition, no counterpart to this function on the
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* shutdown path.
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*/
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void initialise ( void ) {
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struct init_fn *init_fn;
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/* Call registered initialisation functions */
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for_each_table_entry ( init_fn, INIT_FNS )
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init_fn->initialise ();
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}
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/**
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* Start up iPXE
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*
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* This function performs the repeatable initialisation steps, such as
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* probing devices. You may call startup() and shutdown() multiple
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* times (as is done via the PXE API when PXENV_START_UNDI is used).
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*/
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void startup ( void ) {
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struct startup_fn *startup_fn;
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if ( started )
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return;
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/* Call registered startup functions */
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for_each_table_entry ( startup_fn, STARTUP_FNS ) {
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if ( startup_fn->startup ) {
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DBGC ( colour, "INIT startup %s...\n",
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startup_fn->name );
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startup_fn->startup();
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}
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}
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started = 1;
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DBGC ( colour, "INIT startup complete\n" );
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}
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/**
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* Shut down iPXE
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*
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* @v flags Shutdown behaviour flags
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*
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* This function reverses the actions of startup(), and leaves iPXE in
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* a state ready to be removed from memory. You may call startup()
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* again after calling shutdown().
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*
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* Call this function only once, before either exiting main() or
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* starting up a non-returnable image.
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*/
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void shutdown ( int flags ) {
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struct startup_fn *startup_fn;
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if ( ! started )
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return;
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/* Call registered shutdown functions (in reverse order) */
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for_each_table_entry_reverse ( startup_fn, STARTUP_FNS ) {
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if ( startup_fn->shutdown ) {
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DBGC ( colour, "INIT shutdown %s...\n",
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startup_fn->name );
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startup_fn->shutdown ( flags );
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}
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}
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/* Reset console */
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console_reset();
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started = 0;
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DBGC ( colour, "INIT shutdown complete\n" );
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}
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