mirror of
https://github.com/FreeRTOS/FreeRTOS-Kernel.git
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128 lines
3.5 KiB
ArmAsm
128 lines
3.5 KiB
ArmAsm
/*
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* Copyright (C) 2017 C-SKY Microsystems Co., Ltd. All rights reserved.
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*
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* SPDX-License-Identifier: MIT
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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//#include <csi_config.h>
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/********************************************************************
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* Functions: vPortStartTask
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*
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********************************************************************/
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.global vPortStartTask
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.type vPortStartTask, %function
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vPortStartTask:
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psrclr ie
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lrw r4, pxCurrentTCB
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ld.w r4, (r4) // the current task stack pointer is the first member
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ld.w sp, (r4)
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ldw r0, (sp, 64)
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mtcr r0, epc
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ldw r0, (sp, 60)
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mtcr r0, epsr
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ldw r15, (sp, 56)
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ldm r0-r13, (sp)
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addi sp, 68
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rte
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/********************************************************************
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* Functions: vPortYield
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*
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********************************************************************/
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.global vPortYield
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.type vPortYield, %function
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vPortYield:
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psrclr ee
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subi sp, 68
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stm r0-r13, (sp)
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stw r15, (sp, 56)
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mfcr r0, psr
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bseti r0, 8
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stw r0, (sp, 60)
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stw r15, (sp, 64)
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lrw r2, pxCurrentTCB
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ld.w r3, (r2)
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st.w sp, (r3)
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jbsr vTaskSwitchContext
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lrw r4, pxCurrentTCB
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ld.w r4, (r4)
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ld.w sp, (r4)
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ldw r0, (sp, 64)
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mtcr r0, epc
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ldw r0, (sp, 60)
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mtcr r0, epsr
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ldw r15, (sp, 56)
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ldm r0-r13, (sp)
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addi sp, 68
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rte
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/********************************************************************
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* Functions: NOVIC_IRQ_Default_Handler
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*
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********************************************************************/
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.global NOVIC_IRQ_Default_Handler
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.type NOVIC_IRQ_Default_Handler, %function
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NOVIC_IRQ_Default_Handler:
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psrset ee
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subi sp, 68
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stm r0-r13, (sp)
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stw r15, (sp, 56)
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mfcr r0, epsr
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stw r0, (sp, 60)
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mfcr r0, epc
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stw r0, (sp, 64)
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lrw r7, pxCurrentTCB
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ldw r7, (r7)
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stw sp, (r7)
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lrw sp, g_top_irqstack
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lrw r1, g_irqvector
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mfcr r0, psr
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lsri r0, 16
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sextb r0
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subi r0, 32
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lsli r0, 2
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add r1, r0
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ldw r1, (r1)
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lsri r0, 2
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jsr r1
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lrw r7, pxCurrentTCB
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ldw r7, (r7)
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ldw sp, (r7)
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ldw r0, (sp, 64)
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mtcr r0, epc
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ldw r0, (sp, 60)
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mtcr r0, epsr
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ldm r0-r13, (sp)
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ldw r15, (sp, 56)
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addi sp, 68
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rte
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