2 * ePAPR para-virtualization support.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License, version 2, as
6 * published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
17 * Copyright (C) 2012 Freescale Semiconductor, Inc.
21 #include <asm/epapr_hcalls.h>
22 #include <asm/cacheflush.h>
23 #include <asm/code-patching.h>
24 #include <asm/machdep.h>
26 #if !defined(CONFIG_64BIT) || defined(CONFIG_PPC_BOOK3E_64)
27 extern void epapr_ev_idle(void);
28 extern u32 epapr_ev_idle_start
[];
31 bool epapr_paravirt_enabled
;
33 static int __init
early_init_dt_scan_epapr(unsigned long node
,
35 int depth
, void *data
)
41 insts
= of_get_flat_dt_prop(node
, "hcall-instructions", &len
);
45 if (len
% 4 || len
> (4 * 4))
48 for (i
= 0; i
< (len
/ 4); i
++) {
49 patch_instruction(epapr_hypercall_start
+ i
, insts
[i
]);
50 #if !defined(CONFIG_64BIT) || defined(CONFIG_PPC_BOOK3E_64)
51 patch_instruction(epapr_ev_idle_start
+ i
, insts
[i
]);
55 #if !defined(CONFIG_64BIT) || defined(CONFIG_PPC_BOOK3E_64)
56 if (of_get_flat_dt_prop(node
, "has-idle", NULL
))
57 ppc_md
.power_save
= epapr_ev_idle
;
60 epapr_paravirt_enabled
= true;
65 int __init
epapr_paravirt_early_init(void)
67 of_scan_flat_dt(early_init_dt_scan_epapr
, NULL
);