songyanguang
70 lines
1.6 KiB
ArmAsm
70 lines
1.6 KiB
ArmAsm
/*
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* Copyright (c) 2020 AIIT XUOS Lab
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* XiUOS is licensed under Mulan PSL v2.
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* You can use this software according to the terms and conditions of the Mulan PSL v2.
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* You may obtain a copy of Mulan PSL v2 at:
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* http://license.coscl.org.cn/MulanPSL2
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PSL v2 for more details.
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*/
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/**
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* @file context_switch.S
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* @brief task context switch functions
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* @version 1.0
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* @author AIIT XUOS Lab
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* @date 2024.4.10
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*/
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/*************************************************
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File name: context_switch.S
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Description: task context switch functions
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Others:
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History:
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*************************************************/
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/*
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* Integer register context switch
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* The callee-saved registers must be saved and restored.
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*
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* a0: previous thread_struct (must be preserved across the switch)
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* a1: next thread_struct
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*
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*/
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.global context_switch
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context_switch:
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sd ra, 0(a0)
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sd sp, 8(a0)
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sd s0, 16(a0)
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sd s1, 24(a0)
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sd s2, 32(a0)
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sd s3, 40(a0)
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sd s4, 48(a0)
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sd s5, 56(a0)
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sd s6, 64(a0)
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sd s7, 72(a0)
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sd s8, 80(a0)
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sd s9, 88(a0)
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sd s10, 96(a0)
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sd s11, 104(a0)
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ld ra, 0(a1)
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ld sp, 8(a1)
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ld s0, 16(a1)
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ld s1, 24(a1)
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ld s2, 32(a1)
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ld s3, 40(a1)
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ld s4, 48(a1)
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ld s5, 56(a1)
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ld s6, 64(a1)
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ld s7, 72(a1)
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ld s8, 80(a1)
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ld s9, 88(a1)
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ld s10, 96(a1)
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ld s11, 104(a1)
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mv tp, a1
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ret
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