84 lines
2.6 KiB
C
84 lines
2.6 KiB
C
|
/*
|
||
|
* Copyright (C) 2008 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., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||
|
*/
|
||
|
|
||
|
#include <stdlib.h>
|
||
|
#include <gpxe/efi/efi.h>
|
||
|
#include <gpxe/uuid.h>
|
||
|
|
||
|
/** Image handle passed to entry point */
|
||
|
EFI_HANDLE efi_image_handle;
|
||
|
|
||
|
/** System table passed to entry point */
|
||
|
EFI_SYSTEM_TABLE *efi_systab;
|
||
|
|
||
|
/** Declared used EFI protocols */
|
||
|
static struct efi_protocol efi_protocols[0] \
|
||
|
__table_start ( struct efi_protocol, efi_protocols );
|
||
|
static struct efi_protocol efi_protocols_end[0] \
|
||
|
__table_end ( struct efi_protocol, efi_protocols );
|
||
|
|
||
|
/**
|
||
|
* EFI entry point
|
||
|
*
|
||
|
* @v image_handle Image handle
|
||
|
* @v systab System table
|
||
|
* @ret efirc EFI return status code
|
||
|
*/
|
||
|
EFI_STATUS EFIAPI efi_entry ( EFI_HANDLE image_handle,
|
||
|
EFI_SYSTEM_TABLE *systab ) {
|
||
|
EFI_BOOT_SERVICES *bs;
|
||
|
struct efi_protocol *prot;
|
||
|
EFI_STATUS efirc;
|
||
|
|
||
|
/* Store image handle and system table pointer for future use */
|
||
|
efi_image_handle = image_handle;
|
||
|
efi_systab = systab;
|
||
|
|
||
|
/* Sanity checks */
|
||
|
if ( ! systab )
|
||
|
return EFI_NOT_AVAILABLE_YET;
|
||
|
if ( ! systab->ConOut )
|
||
|
return EFI_NOT_AVAILABLE_YET;
|
||
|
if ( ! systab->BootServices ) {
|
||
|
DBGC ( systab, "EFI provided no BootServices entry point\n" );
|
||
|
return EFI_NOT_AVAILABLE_YET;
|
||
|
}
|
||
|
if ( ! systab->RuntimeServices ) {
|
||
|
DBGC ( systab, "EFI provided no RuntimeServices entry "
|
||
|
"point\n" );
|
||
|
return EFI_NOT_AVAILABLE_YET;
|
||
|
}
|
||
|
DBGC ( systab, "EFI handle %p systab %p\n", image_handle, systab );
|
||
|
|
||
|
/* Look up required protocols */
|
||
|
bs = systab->BootServices;
|
||
|
for ( prot = efi_protocols ; prot < efi_protocols_end ; prot++ ) {
|
||
|
if ( ( efirc = bs->LocateProtocol ( &prot->u.guid, NULL,
|
||
|
prot->protocol ) ) != 0 ) {
|
||
|
DBGC ( systab, "EFI does not provide protocol %s\n",
|
||
|
uuid_ntoa ( &prot->u.uuid ) );
|
||
|
return efirc;
|
||
|
}
|
||
|
DBGC ( systab, "EFI protocol %s is at %p\n",
|
||
|
uuid_ntoa ( &prot->u.uuid ), *(prot->protocol) );
|
||
|
}
|
||
|
|
||
|
/* Call to main() */
|
||
|
return RC_TO_EFIRC ( main () );
|
||
|
}
|