mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-06 10:34:09 +08:00
45879a5775
Instead of doing a RMW on SCTLR_EL1 to disable the MMU, use the existing define that loads the right set of bits. Acked-by: Will Deacon <will@kernel.org> Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org>
54 lines
1.4 KiB
ArmAsm
54 lines
1.4 KiB
ArmAsm
/* 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>
|
|
|
|
.text
|
|
.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.
|
|
*/
|
|
SYM_CODE_START(__cpu_soft_restart)
|
|
mov_q x12, INIT_SCTLR_EL1_MMU_OFF
|
|
pre_disable_mmu_workaround
|
|
/*
|
|
* either disable EL1&0 translation regime or disable EL2&0 translation
|
|
* regime if HCR_EL2.E2H == 1
|
|
*/
|
|
msr sctlr_el1, x12
|
|
isb
|
|
|
|
cbz x0, 1f // el2_switch?
|
|
mov x0, #HVC_SOFT_RESTART
|
|
hvc #0 // no return
|
|
|
|
1: mov x8, x1 // entry
|
|
mov x0, x2 // arg0
|
|
mov x1, x3 // arg1
|
|
mov x2, x4 // arg2
|
|
br x8
|
|
SYM_CODE_END(__cpu_soft_restart)
|
|
|
|
.popsection
|