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reduce two instructions in risc-v irq handler

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This commit is contained in:
acevest
2019-10-09 19:05:20 +08:00
parent 7f001b4230
commit c17df06ff7
2 changed files with 39 additions and 7 deletions
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17
arch/risc-v/bumblebee/gcc/riscv_port_s.S
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@@ -1,3 +1,20 @@
/*----------------------------------------------------------------------------
* Tencent is pleased to support the open source community by making TencentOS
* available.
*
* Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
* If you have downloaded a copy of the TencentOS binary from Tencent, please
* note that the TencentOS binary is licensed under the BSD 3-Clause License.
*
* If you have downloaded a copy of the TencentOS source code from Tencent,
* please note that TencentOS source code is licensed under the BSD 3-Clause
* License, except for the third-party components listed below which are
* subject to different license terms. Your integration of TencentOS into your
* own projects may require compliance with the BSD 3-Clause License, as well
* as the other licenses applicable to the third-party components included
* within TencentOS.
*---------------------------------------------------------------------------*/
.global irq_entry
.global trap_entry

29
arch/risc-v/rv32i/gcc/port_s.S
View File

@@ -1,3 +1,20 @@
/*----------------------------------------------------------------------------
* Tencent is pleased to support the open source community by making TencentOS
* available.
*
* Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
* If you have downloaded a copy of the TencentOS binary from Tencent, please
* note that the TencentOS binary is licensed under the BSD 3-Clause License.
*
* If you have downloaded a copy of the TencentOS source code from Tencent,
* please note that TencentOS source code is licensed under the BSD 3-Clause
* License, except for the third-party components listed below which are
* subject to different license terms. Your integration of TencentOS into your
* own projects may require compliance with the BSD 3-Clause License, as well
* as the other licenses applicable to the third-party components included
* within TencentOS.
*---------------------------------------------------------------------------*/
#include "riscv_port.h"
.global port_int_disable
@@ -142,8 +159,7 @@ port_sched_start:
csrs mie, t0
// load sp from k_curr_task->sp
la t0, k_curr_task // t0 = &k_curr_task
lw t0, (t0) // t0 = &(k_curr_task->sp)
lw t0, k_curr_task
lw sp, (t0) // sp = k_curr_task->sp
j restore_context
@@ -280,10 +296,10 @@ rv32_exception_entry:
csrr t0, mstatus
sw t0, __reg_mstatus__OFFSET(sp)
// switch to irq stack
mv t0, sp
la t1, k_irq_stk_top
lw sp, (t1)
// switch to irq stack
lw sp, k_irq_stk_top
// save task stack pointer
sw t0, (sp)
// get irq num and call irq handler
@@ -293,8 +309,7 @@ rv32_exception_entry:
call cpu_irq_entry
// switch back to task stack
lw t0, (sp)
mv sp, t0
lw sp, (sp)
la t0, k_curr_task
la t1, k_next_task