mirror of https://github.com/ipxe/ipxe.git
133 lines
3.1 KiB
C
133 lines
3.1 KiB
C
/*
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* Copyright (C) 2009 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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FILE_LICENCE ( GPL2_OR_LATER );
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#include <stdlib.h>
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#include <errno.h>
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#include <ipxe/device.h>
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#include <ipxe/init.h>
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#include <ipxe/efi/efi.h>
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#include <ipxe/efi/efi_driver.h>
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#include <ipxe/efi/efi_snp.h>
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#include <ipxe/efi/efi_autoboot.h>
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#include <ipxe/efi/efi_autoexec.h>
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#include <ipxe/efi/efi_cachedhcp.h>
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#include <ipxe/efi/efi_watchdog.h>
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#include <ipxe/efi/efi_veto.h>
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/**
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* EFI entry point
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*
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* @v image_handle Image handle
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* @v systab System table
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* @ret efirc EFI return status code
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*/
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EFI_STATUS EFIAPI _efi_start ( EFI_HANDLE image_handle,
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EFI_SYSTEM_TABLE *systab ) {
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EFI_STATUS efirc;
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int rc;
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/* Initialise stack cookie */
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efi_init_stack_guard ( image_handle );
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/* Initialise EFI environment */
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if ( ( efirc = efi_init ( image_handle, systab ) ) != 0 )
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goto err_init;
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/* Claim SNP devices for use by iPXE */
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efi_snp_claim();
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/* Start watchdog holdoff timer */
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efi_watchdog_start();
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/* Call to main() */
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if ( ( rc = main() ) != 0 ) {
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efirc = EFIRC ( rc );
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goto err_main;
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}
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err_main:
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efi_watchdog_stop();
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efi_snp_release();
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efi_loaded_image->Unload ( image_handle );
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efi_driver_reconnect_all();
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err_init:
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return efirc;
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}
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/**
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* Initialise EFI application
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*
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*/
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static void efi_init_application ( void ) {
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EFI_HANDLE device = efi_loaded_image->DeviceHandle;
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/* Identify autoboot device, if any */
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efi_set_autoboot_ll_addr ( device );
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/* Store cached DHCP packet, if any */
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efi_cachedhcp_record ( device );
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/* Load autoexec script, if any */
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efi_autoexec_load ( device );
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}
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/** EFI application initialisation function */
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struct init_fn efi_init_application_fn __init_fn ( INIT_NORMAL ) = {
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.initialise = efi_init_application,
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};
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/**
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* Probe EFI root bus
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*
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* @v rootdev EFI root device
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*/
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static int efi_probe ( struct root_device *rootdev __unused ) {
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/* Remove any vetoed drivers */
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efi_veto();
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/* Connect our drivers */
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return efi_driver_connect_all();
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}
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/**
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* Remove EFI root bus
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*
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* @v rootdev EFI root device
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*/
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static void efi_remove ( struct root_device *rootdev __unused ) {
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/* Disconnect our drivers */
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efi_driver_disconnect_all();
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}
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/** EFI root device driver */
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static struct root_driver efi_root_driver = {
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.probe = efi_probe,
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.remove = efi_remove,
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};
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/** EFI root device */
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struct root_device efi_root_device __root_device = {
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.dev = { .name = "EFI" },
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.driver = &efi_root_driver,
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};
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