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 stptr.d a3, a0, THREAD_SCHED_RA 25 stptr.d a4, a0, THREAD_SCHED_CFA 26#if defined(CONFIG_STACKPROTECTOR) && !defined(CONFIG_SMP) 27 la t7, __stack_chk_guard 28 LONG_L t8, a1, TASK_STACK_CANARY 29 LONG_S t8, t7, 0 30#endif 31 move tp, a2 32 cpu_restore_nonscratch a1 33 34 li.w t0, _THREAD_SIZE 35 PTR_ADD t0, t0, tp 36 set_saved_sp t0, t1, t2 37 38 ldptr.d t1, a1, THREAD_CSRPRMD 39 csrwr t1, LOONGARCH_CSR_PRMD 40 41 jr ra 42SYM_FUNC_END(__switch_to) 43