1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
6 #include <asm/asmmacro.h>
7 #include <asm/asm-offsets.h>
8 #include <asm/loongarch.h>
9 #include <asm/regdef.h>
10 #include <asm/stackframe.h>
11 #include <asm/thread_info.h>
14 * task_struct *__switch_to(task_struct *prev, task_struct *next,
15 * struct thread_info *next_ti)
18 SYM_FUNC_START(__switch_to)
19 csrrd t1, LOONGARCH_CSR_PRMD
20 stptr.d t1, a0, THREAD_CSRPRMD
22 cpu_save_nonscratch a0
23 stptr.d ra, a0, THREAD_REG01
24 stptr.d a3, a0, THREAD_SCHED_RA
25 stptr.d a4, a0, THREAD_SCHED_CFA
27 cpu_restore_nonscratch a1
29 li.w t0, _THREAD_SIZE - 32
31 set_saved_sp t0, t1, t2
33 ldptr.d t1, a1, THREAD_CSRPRMD
34 csrwr t1, LOONGARCH_CSR_PRMD
37 SYM_FUNC_END(__switch_to)