67 lines
1.6 KiB
C
67 lines
1.6 KiB
C
/*
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* Copyright (c) 2006-2024, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2024-03-25 Shell Trimming unecessary ops and
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* improve the performance of ctx switch
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*/
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#ifndef __ARM64_CONTEXT_H__
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#define __ARM64_CONTEXT_H__
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#include "../include/context_gcc.h"
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#include <rtconfig.h>
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#include <asm-generic.h>
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#include <asm-fpu.h>
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#include <armv8.h>
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.macro RESTORE_CONTEXT_SWITCH
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/* Set the SP to point to the stack of the task being restored. */
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mov sp, x0
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_RESTORE_CONTEXT_SWITCH
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.endm
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.macro RESTORE_IRQ_CONTEXT
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/* Set the SP to point to the stack of the task being restored. */
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mov sp, x0
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ldp x2, x3, [sp], #0x10 /* SPSR and ELR. */
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tst x3, #0x1f
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msr spsr_el1, x3
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msr elr_el1, x2
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ldp x29, x30, [sp], #0x10
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msr sp_el0, x29
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ldp x28, x29, [sp], #0x10
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msr fpcr, x28
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msr fpsr, x29
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ldp x28, x29, [sp], #0x10
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ldp x26, x27, [sp], #0x10
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ldp x24, x25, [sp], #0x10
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ldp x22, x23, [sp], #0x10
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ldp x20, x21, [sp], #0x10
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ldp x18, x19, [sp], #0x10
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ldp x16, x17, [sp], #0x10
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ldp x14, x15, [sp], #0x10
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ldp x12, x13, [sp], #0x10
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ldp x10, x11, [sp], #0x10
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ldp x8, x9, [sp], #0x10
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ldp x6, x7, [sp], #0x10
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ldp x4, x5, [sp], #0x10
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ldp x2, x3, [sp], #0x10
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ldp x0, x1, [sp], #0x10
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RESTORE_FPU sp
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#ifdef RT_USING_SMART
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beq arch_ret_to_user
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#endif
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eret
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.endm
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#endif /* __ARM64_CONTEXT_H__ */
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