mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 08:39:59 +07:00
d2912cb15b
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
53 lines
1.3 KiB
ArmAsm
53 lines
1.3 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.
|
|
*/
|
|
ENTRY(__cpu_soft_restart)
|
|
/* Clear sctlr_el1 flags. */
|
|
mrs x12, sctlr_el1
|
|
ldr x13, =SCTLR_ELx_FLAGS
|
|
bic x12, x12, x13
|
|
pre_disable_mmu_workaround
|
|
msr sctlr_el1, x12
|
|
isb
|
|
|
|
cbz x0, 1f // el2_switch?
|
|
mov x0, #HVC_SOFT_RESTART
|
|
hvc #0 // no return
|
|
|
|
1: mov x18, x1 // entry
|
|
mov x0, x2 // arg0
|
|
mov x1, x3 // arg1
|
|
mov x2, x4 // arg2
|
|
br x18
|
|
ENDPROC(__cpu_soft_restart)
|
|
|
|
.popsection
|