blob: 6ea337d464c414ed67cd139071022500220604d1 [file] [log] [blame]
/* SPDX-License-Identifier: GPL-2.0-only */
* CPU reset routines
* Copyright (C) 2001 Deep Blue Solutions Ltd.
* Copyright (C) 2012 ARM Ltd.
* Copyright (C) 2015 Huawei Futurewei Technologies.
#include <linux/linkage.h>
#include <asm/assembler.h>
#include <asm/sysreg.h>
#include <asm/virt.h>
.pushsection .idmap.text, "awx"
* __cpu_soft_restart(el2_switch, entry, arg0, arg1, arg2) - Helper for
* cpu_soft_restart.
* @el2_switch: Flag to indicate a switch to EL2 is needed.
* @entry: Location to jump to for soft reset.
* arg0: First argument passed to @entry. (relocation list)
* arg1: Second argument passed to @entry.(physical kernel entry)
* arg2: Third argument passed to @entry. (physical dtb address)
* Put the CPU into the same state as it would be if it had been reset, and
* branch to what would be the reset vector. It must be executed with the
* flat identity mapping.
/* Clear sctlr_el1 flags. */
mrs x12, sctlr_el1
ldr x13, =SCTLR_ELx_FLAGS
bic x12, x12, x13
msr sctlr_el1, x12
cbz x0, 1f // el2_switch?
hvc #0 // no return
1: mov x18, x1 // entry
mov x0, x2 // arg0
mov x1, x3 // arg1
mov x2, x4 // arg2
br x18