summaryrefslogtreecommitdiff
path: root/arch/arm/cpu/armv8/transition.S
blob: bbccf2b3958d09a1c0c9c99b4548805421805355 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
/*
 * (C) Copyright 2013
 * David Feng <fenghua@phytium.com.cn>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <asm-offsets.h>
#include <config.h>
#include <linux/linkage.h>
#include <asm/macro.h>

ENTRY(armv8_switch_to_el2)
	switch_el x5, 1f, 0f, 0f
0:
	/*
	 * x3 is kernel entry point or switch_to_el1
	 * if CONFIG_ARMV8_SWITCH_TO_EL1 is defined.
         * When running in EL2 now, jump to the
	 * address saved in x3.
	 */
	br x3
1:	armv8_switch_to_el2_m x3, x4, x5
ENDPROC(armv8_switch_to_el2)

ENTRY(armv8_switch_to_el1)
	switch_el x5, 0f, 1f, 0f
0:
	/* x3 is kernel entry point. When running in EL1
	 * now, jump to the address saved in x3.
	 */
	br x3
1:	armv8_switch_to_el1_m x3, x4, x5
ENDPROC(armv8_switch_to_el1)