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/*
* Copyright (c) 2006-2024, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-05-18 Jesven the first version
* 2023-06-24 Shell Support backtrace for user thread
* 2024-01-06 Shell Fix barrier on irq_disable/enable
* 2024-03-28 Shell Move vector handling codes from context_gcc.S
*/
#ifndef __ASSEMBLY__
#define __ASSEMBLY__
#endif
#include "context_gcc.h"
#include "../include/vector_gcc.h"
#include <rtconfig.h>
#include <asm-generic.h>
#include <asm-fpu.h>
#include <armv8.h>
.section .text
.globl rt_hw_context_switch_to
/*
* void rt_hw_context_switch_to(rt_uint3 to, struct rt_thread *to_thread);
* X0 --> to (thread stack)
* X1 --> to_thread
*/
rt_hw_context_switch_to:
ldr x0, [x0]
mov sp, x0
mov x0, x1
bl rt_cpus_lock_status_restore
#ifdef RT_USING_SMART
bl rt_thread_self
bl lwp_user_setting_restore
#endif
b rt_hw_context_switch_exit
.globl rt_hw_context_switch
/*
* void rt_hw_context_switch(rt_uint32 from, rt_uint32
to, struct rt_thread *to_thread);
* X0 --> from (from_thread stack)
* X1 --> to (to_thread stack)
* X2 --> to_thread
*/
rt_hw_context_switch:
SAVE_CONTEXT_SWITCH
mov x3, sp
str x3, [x0] // store sp in preempted tasks TCB
ldr x0, [x1] // get new task stack pointer
mov sp, x0
/* backup thread self */
mov x19, x2
mov x0, x19
bl rt_cpus_lock_status_restore
#ifdef RT_USING_SMART
mov x0, x19
bl lwp_user_setting_restore
#endif
b rt_hw_context_switch_exit
.globl rt_hw_context_switch_interrupt
/*
* void rt_hw_context_switch_interrupt(context, from sp, to sp, tp tcb)
* X0 :interrupt context
* X1 :addr of from_thread's sp
* X2 :addr of to_thread's sp
* X3 :to_thread's tcb
*/
rt_hw_context_switch_interrupt:
stp x0, x1, [sp, #-0x10]!
stp x2, x3, [sp, #-0x10]!
stp x29, x30, [sp, #-0x10]!
#ifdef RT_USING_SMART
bl rt_thread_self
bl lwp_user_setting_save
#endif
ldp x29, x30, [sp], #0x10
ldp x2, x3, [sp], #0x10
ldp x0, x1, [sp], #0x10
str x0, [x1]
ldr x0, [x2]
mov sp, x0
mov x0, x3
mov x19, x0
bl rt_cpus_lock_status_restore
mov x0, x19
#ifdef RT_USING_SMART
bl lwp_user_setting_restore
#endif
b rt_hw_context_switch_exit
.global rt_hw_context_switch_exit
rt_hw_context_switch_exit:
clrex
mov x0, sp
RESTORE_CONTEXT_SWITCH
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