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/*
* Copyright (C) 2013 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 );
/**
* @file
*
* EFI debugging utilities
*
*/
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <ipxe/uuid.h>
#include <ipxe/efi/efi.h>
#include <ipxe/efi/efi_driver.h>
#include <ipxe/efi/Protocol/DevicePath.h>
#include <ipxe/efi/Protocol/DevicePathToText.h>
/** Device path to text protocol */
static EFI_DEVICE_PATH_TO_TEXT_PROTOCOL *efidpt;
EFI_REQUEST_PROTOCOL ( EFI_DEVICE_PATH_TO_TEXT_PROTOCOL, &efidpt );
/**
* Convert GUID to a printable string
*
* @v guid GUID
* @ret string Printable string
*/
const char * efi_guid_ntoa ( EFI_GUID *guid ) {
union {
union uuid uuid;
EFI_GUID guid;
} u;
/* Convert GUID to standard endianness */
memcpy ( &u.guid, guid, sizeof ( u.guid ) );
uuid_mangle ( &u.uuid );
return uuid_ntoa ( &u.uuid );
}
/**
* Print list of protocol handlers attached to a handle
*
* @v handle EFI handle
*/
void dbg_efi_protocols ( EFI_HANDLE handle ) {
EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
EFI_GUID **protocols;
UINTN count;
unsigned int i;
EFI_STATUS efirc;
int rc;
/* Retrieve list of protocols */
if ( ( efirc = bs->ProtocolsPerHandle ( handle, &protocols,
&count ) ) != 0 ) {
rc = -EEFI ( efirc );
printf ( "EFI could not retrieve protocols for %p: %s\n",
handle, strerror ( rc ) );
return;
}
/* Dump list of protocols */
for ( i = 0 ; i < count ; i++ )
printf ( "%s\n", efi_guid_ntoa ( protocols[i] ) );
/* Free list */
bs->FreePool ( protocols );
}
/**
* Print device path
*
* @v path Device path
*/
void dbg_efi_devpath ( EFI_DEVICE_PATH_PROTOCOL *path ) {
EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
EFI_DEVICE_PATH_PROTOCOL *end;
CHAR16 *text;
size_t len;
/* Convert path to a textual representation */
if ( ! efidpt )
goto err_no_efidpt;
text = efidpt->ConvertDevicePathToText ( path, TRUE, FALSE );
if ( ! text )
goto err_convert;
/* Print path */
printf ( "%ls", text );
/* Free path */
bs->FreePool ( text );
return;
err_convert:
err_no_efidpt:
printf ( "<cannot convert>:\n" );
end = efi_devpath_end ( path );
len = ( ( ( void * ) end ) - ( ( void * ) path ) +
sizeof ( *end ) );
dbg_hex_dump_da ( 0, path, len );
}
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