blob: 10d8f0bf6d156221f45e64c9b6fad63d8c06cce9 [file] [log] [blame]
/*
* Copyright (C) 2009 Michael Brown <mbrown@fensystems.co.uk>.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
FILE_LICENCE ( GPL2_OR_LATER );
#include <stdlib.h>
#include <errno.h>
#include <ipxe/device.h>
#include <ipxe/uri.h>
#include <ipxe/init.h>
#include <ipxe/efi/efi.h>
#include <ipxe/efi/efi_driver.h>
#include <ipxe/efi/efi_snp.h>
#include <ipxe/efi/efi_autoboot.h>
#include <ipxe/efi/efi_autoexec.h>
#include <ipxe/efi/efi_cachedhcp.h>
#include <ipxe/efi/efi_watchdog.h>
#include <ipxe/efi/efi_path.h>
#include <ipxe/efi/efi_veto.h>
/**
* EFI entry point
*
* @v image_handle Image handle
* @v systab System table
* @ret efirc EFI return status code
*/
EFI_STATUS EFIAPI _efi_start ( EFI_HANDLE image_handle,
EFI_SYSTEM_TABLE *systab ) {
EFI_STATUS efirc;
int rc;
/* Initialise stack cookie */
efi_init_stack_guard ( image_handle );
/* Initialise EFI environment */
if ( ( efirc = efi_init ( image_handle, systab ) ) != 0 )
goto err_init;
/* Claim SNP devices for use by iPXE */
efi_snp_claim();
/* Start watchdog holdoff timer */
efi_watchdog_start();
/* Call to main() */
if ( ( rc = main() ) != 0 ) {
efirc = EFIRC ( rc );
goto err_main;
}
err_main:
efi_watchdog_stop();
efi_snp_release();
efi_loaded_image->Unload ( image_handle );
efi_driver_reconnect_all();
err_init:
return efirc;
}
/**
* Initialise EFI application
*
*/
static void efi_init_application ( void ) {
EFI_HANDLE device = efi_loaded_image->DeviceHandle;
EFI_DEVICE_PATH_PROTOCOL *devpath = efi_loaded_image_path;
struct uri *uri;
/* Set current working URI from device path, if present */
uri = efi_path_uri ( devpath );
if ( uri )
churi ( uri );
uri_put ( uri );
/* Identify autoboot device, if any */
efi_set_autoboot_ll_addr ( device, devpath );
/* Store cached DHCP packet, if any */
efi_cachedhcp_record ( device, devpath );
}
/** EFI application initialisation function */
struct init_fn efi_init_application_fn __init_fn ( INIT_NORMAL ) = {
.initialise = efi_init_application,
};
/**
* Probe EFI root bus
*
* @v rootdev EFI root device
*/
static int efi_probe ( struct root_device *rootdev __unused ) {
/* Try loading autoexec script */
efi_autoexec_load();
/* Remove any vetoed drivers */
efi_veto();
/* Connect our drivers */
return efi_driver_connect_all();
}
/**
* Remove EFI root bus
*
* @v rootdev EFI root device
*/
static void efi_remove ( struct root_device *rootdev __unused ) {
/* Disconnect our drivers */
efi_driver_disconnect_all();
}
/** EFI root device driver */
static struct root_driver efi_root_driver = {
.probe = efi_probe,
.remove = efi_remove,
};
/** EFI root device */
struct root_device efi_root_device __root_device = {
.dev = { .name = "EFI" },
.driver = &efi_root_driver,
};