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- /* 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
- stptr.d a3, a0, THREAD_SCHED_RA
- stptr.d a4, a0, THREAD_SCHED_CFA
- #if defined(CONFIG_STACKPROTECTOR) && !defined(CONFIG_SMP)
- la t7, __stack_chk_guard
- LONG_L t8, a1, TASK_STACK_CANARY
- LONG_S t8, t7, 0
- #endif
- move tp, a2
- cpu_restore_nonscratch a1
- li.w t0, _THREAD_SIZE
- 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)
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