1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * CPU reset routines
4 *
5 * Copyright (C) 2001 Deep Blue Solutions Ltd.
6 * Copyright (C) 2012 ARM Ltd.
7 * Copyright (C) 2015 Huawei Futurewei Technol
8 */
9
10 #include <linux/linkage.h>
11 #include <linux/cfi_types.h>
12 #include <asm/assembler.h>
13 #include <asm/sysreg.h>
14 #include <asm/virt.h>
15
16 .text
17 .pushsection .idmap.text, "a"
18
19 /*
20 * cpu_soft_restart(el2_switch, entry, arg0, a
21 *
22 * @el2_switch: Flag to indicate a switch to E
23 * @entry: Location to jump to for soft reset.
24 * arg0: First argument passed to @entry. (rel
25 * arg1: Second argument passed to @entry.(phy
26 * arg2: Third argument passed to @entry. (phy
27 *
28 * Put the CPU into the same state as it would
29 * branch to what would be the reset vector. I
30 * flat identity mapping.
31 */
32 SYM_TYPED_FUNC_START(cpu_soft_restart)
33 mov_q x12, INIT_SCTLR_EL1_MMU_OFF
34 pre_disable_mmu_workaround
35 /*
36 * either disable EL1&0 translation re
37 * regime if HCR_EL2.E2H == 1
38 */
39 msr sctlr_el1, x12
40 isb
41
42 cbz x0, 1f
43 mov x0, #HVC_SOFT_RESTART
44 hvc #0
45
46 1: mov x8, x1
47 mov x0, x2
48 mov x1, x3
49 mov x2, x4
50 br x8
51 SYM_FUNC_END(cpu_soft_restart)
52
53 .popsection
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