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[efi] Identify autoboot device by MAC address when chainloading

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Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2014-07-08 00:35:49 +01:00
parent 00c745e5ff
commit bcfd3dea1d
3 changed files with 89 additions and 0 deletions
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71
src/interface/efi/efi_autoboot.c Normal file
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/*
* Copyright (C) 2014 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 <ipxe/efi/efi.h>
#include <ipxe/efi/efi_autoboot.h>
#include <ipxe/efi/Protocol/SimpleNetwork.h>
#include <usr/autoboot.h>
/** @file
*
* EFI autoboot device
*
*/
/** EFI simple network protocol GUID */
static EFI_GUID efi_simple_network_protocol_guid
= EFI_SIMPLE_NETWORK_PROTOCOL_GUID;
/**
* Identify autoboot device
*
*/
void efi_set_autoboot ( void ) {
EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
union {
EFI_SIMPLE_NETWORK_PROTOCOL *snp;
void *interface;
} snp;
EFI_SIMPLE_NETWORK_MODE *mode;
EFI_STATUS efirc;
/* Look for an SNP instance on the image's device handle */
if ( ( efirc = bs->OpenProtocol ( efi_loaded_image->DeviceHandle,
&efi_simple_network_protocol_guid,
&snp.interface, efi_image_handle,
NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL ))!=0){
DBGC ( efi_loaded_image, "EFI found no autoboot device\n" );
return;
}
/* Record autoboot device */
mode = snp.snp->Mode;
set_autoboot_ll_addr ( &mode->CurrentAddress, mode->HwAddressSize );
DBGC ( efi_loaded_image, "EFI found autoboot link-layer address:\n" );
DBGC_HDA ( efi_loaded_image, 0, &mode->CurrentAddress,
mode->HwAddressSize );
/* Close protocol */
bs->CloseProtocol ( efi_loaded_image->DeviceHandle,
&efi_simple_network_protocol_guid,
efi_image_handle, NULL );
}