1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited 4 */ 5#include <asm/asm.h> 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> 12 13/* 14 * task_struct *__switch_to(task_struct *prev, task_struct *next, 15 * struct thread_info *next_ti) 16 */ 17 .align 5 18SYM_FUNC_START(__switch_to) 19 csrrd t1, LOONGARCH_CSR_PRMD 20 stptr.d t1, a0, THREAD_CSRPRMD 21 22 cpu_save_nonscratch a0 23 stptr.d ra, a0, THREAD_REG01 24 move tp, a2 25 cpu_restore_nonscratch a1 26 27 li.w t0, _THREAD_SIZE - 32 28 PTR_ADD t0, t0, tp 29 set_saved_sp t0, t1, t2 30 31 ldptr.d t1, a1, THREAD_CSRPRMD 32 csrwr t1, LOONGARCH_CSR_PRMD 33 34 jr ra 35SYM_FUNC_END(__switch_to) 36