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/*
* Copyright (C) 2001-2002 Hewlett-Packard Co.
* Contributed by Stephane Eranian <eranian@hpl.hp.com>
*
* This file is part of the ELILO, the EFI Linux boot loader.
*
* ELILO 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, or (at your option)
* any later version.
*
* ELILO 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 ELILO; see the file COPYING. If not, write to the Free
* Software Foundation, 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*
* Please check out the elilo.txt for complete documentation on how
* to use this program.
*/
#include <efi.h>
#include <efilib.h>
#include "elilo.h"
typedef struct {
UINT32 revision;
UINT32 reserved;
VOID *fpswa;
} fpswa_interface_t;
INTN
query_fpswa(VOID **fpswa)
{
EFI_HANDLE fpswa_image;
UINTN size;
EFI_STATUS status;
EFI_GUID FpswaProtocol = FPSWA_PROTOCOL;
DBG_PRT((L"Querying FpswaProtocol"));
size = sizeof(EFI_HANDLE);
status = BS->LocateHandle(ByProtocol, &FpswaProtocol, NULL, &size, &fpswa_image);
if (EFI_ERROR(status)) {
ERR_PRT((L"boot_params could not locate FPSWA driver", status));
return -1;
}
status = BS->HandleProtocol(fpswa_image, &FpswaProtocol, fpswa);
if (EFI_ERROR(status)) {
ERR_PRT((L"boot_params FpswaProtocol not able find the interface"));
return -1;
}
VERB_PRT(3, Print(L"FpswaProtocol = 0x%lx revision=%x\n", *fpswa,
((fpswa_interface_t *)*fpswa)->revision));
return 0;
}
static INTN
do_check_fpswa(EFI_HANDLE image, EFI_HANDLE dev, CHAR16 *fpswa_file)
{
EFI_STATUS status;
EFI_HANDLE handle;
EFI_DEVICE_PATH *dp;
VERB_PRT(3, Print(L"Trying FPSWA driver %s..", fpswa_file));
dp = FileDevicePath(dev, fpswa_file);
if (dp == NULL) {
ERR_PRT((L"Cannot create FilePath for %s", fpswa_file));
return -1;
}
status = BS->LoadImage(0, image, dp, NULL, 0, &handle);
if (EFI_ERROR(status)) {
VERB_PRT(3, Print(L"..not found\n"));
FreePool(dp);
return -1;
}
VERB_PRT(3, Print(L"..starting.."));
status = BS->StartImage(handle, 0, 0);
if (EFI_ERROR(status)) {
VERB_PRT(3, Print(L"failed (%r)\n", status));
/*
* StartImage() automatically unloads if error
* FPSWA init code will automatically abort if newer revision
* is already installed
*/
} else {
VERB_PRT(3, Print(L"..ok\n"));
}
FreePool(dp);
return 0;
}
/*
* If the caller specifies a fpswa filename, then it used instead of the
* defaults.
* Return:
* 0 : indicates that one fpswa driver was loaded, i.e. an update could be done
* -1: no update was found that would have a more recent version of the driver. This is
* not a fatal return value.
*/
INTN
check_fpswa(EFI_HANDLE image, EFI_HANDLE dev, CHAR16 *fpswa_file)
{
/*
* Names are specified using the forward slash as this is also
* supported by the local filesystem protocol. Upper vs. lower
* case is the same
* XXX: fix this to depend of the fileops: maybe in set_defaults
*/
static CHAR16 *filenames[] ={
L"/efi/intel firmware/fpswa.efi",
L"/fpswa.efi",
L"/fw/fpswa.efi",
L"/efi/fpswa.efi",
L"/efi/tools/fpswa.efi",
L"fpswa.efi",
};
UINTN i, count = sizeof(filenames)/sizeof(CHAR16 *);
if (fpswa_file != NULL) return do_check_fpswa(image, dev, fpswa_file);
for (i = 0; i < count; i++) {
if (do_check_fpswa(image, dev, filenames[i]) == 0) return 0;
}
return -1;
}
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