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1 /*
2  * Copyright (c) 2014 Oracle Co., Daniel Kiper
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License as published by
6  * the Free Software Foundation; either version 2 of the License, or
7  * (at your option) any later version.
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License along
15  * with this program.  If not, see <http://www.gnu.org/licenses/>.
16  */
17 
18 #include <linux/bitops.h>
19 #include <linux/efi.h>
20 #include <linux/init.h>
21 #include <linux/string.h>
22 
23 #include <xen/xen-ops.h>
24 
25 #include <asm/page.h>
26 #include <asm/setup.h>
27 
xen_efi_init(void)28 void __init xen_efi_init(void)
29 {
30 	efi_system_table_t *efi_systab_xen;
31 
32 	efi_systab_xen = xen_efi_probe();
33 
34 	if (efi_systab_xen == NULL)
35 		return;
36 
37 	strncpy((char *)&boot_params.efi_info.efi_loader_signature, "Xen",
38 			sizeof(boot_params.efi_info.efi_loader_signature));
39 	boot_params.efi_info.efi_systab = (__u32)__pa(efi_systab_xen);
40 	boot_params.efi_info.efi_systab_hi = (__u32)(__pa(efi_systab_xen) >> 32);
41 
42 	set_bit(EFI_BOOT, &efi.flags);
43 	set_bit(EFI_PARAVIRT, &efi.flags);
44 	set_bit(EFI_64BIT, &efi.flags);
45 }
46