mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-03 23:58:05 +00:00
803b0fc5c3
Add process management support for LoongArch, including: thread info definition, context switch and process tracing. Reviewed-by: WANG Xuerui <git@xen0n.name> Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
35 lines
775 B
ArmAsm
35 lines
775 B
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
|
|
*/
|
|
#include <asm/asm.h>
|
|
#include <asm/asmmacro.h>
|
|
#include <asm/asm-offsets.h>
|
|
#include <asm/loongarch.h>
|
|
#include <asm/regdef.h>
|
|
#include <asm/stackframe.h>
|
|
#include <asm/thread_info.h>
|
|
|
|
/*
|
|
* task_struct *__switch_to(task_struct *prev, task_struct *next,
|
|
* struct thread_info *next_ti)
|
|
*/
|
|
.align 5
|
|
SYM_FUNC_START(__switch_to)
|
|
csrrd t1, LOONGARCH_CSR_PRMD
|
|
stptr.d t1, a0, THREAD_CSRPRMD
|
|
|
|
cpu_save_nonscratch a0
|
|
stptr.d ra, a0, THREAD_REG01
|
|
move tp, a2
|
|
cpu_restore_nonscratch a1
|
|
|
|
li.w t0, _THREAD_SIZE - 32
|
|
PTR_ADD t0, t0, tp
|
|
set_saved_sp t0, t1, t2
|
|
|
|
ldptr.d t1, a1, THREAD_CSRPRMD
|
|
csrwr t1, LOONGARCH_CSR_PRMD
|
|
|
|
jr ra
|
|
SYM_FUNC_END(__switch_to)
|