os_cpu_c.c

LPC1768工程模板

/****************************************Copyright (c)****************************************************
**                            Guangzhou ZHIYUAN electronics Co.,LTD.
**                                      
**                                 http://www.embedtools.com
**
**--------------File Info---------------------------------------------------------------------------------
** File name:               os_cpu_c.c
** Latest modified Date:    2009-07-24
** Latest Version:          1.0
** Descriptions:            μCOS-II在Cortex-M3上的移植代码C语言部分，用realview编译
**
**--------------------------------------------------------------------------------------------------------
** Created by:              Chenmingji
** Created date:            2009-07-24
** Version:                 1.0
** Descriptions:            The original version
**
**--------------------------------------------------------------------------------------------------------
** Modified by:             
** Modified date:           
** Version:                 
** Descriptions:            
**
*********************************************************************************************************/
#define  OS_CPU_GLOBALS
#include "..\..\..\config.h"                                            /*  系统头文件                  */

/*********************************************************************************************************
  全局变量
*********************************************************************************************************/
unsigned int __GuiOsEnterSum;

/*********************************************************************************************************
** Function name:           svcallHandle
** Descriptions:            svcall处理程序
** input parameters:        uiHandle:选择子功能
** output parameters:       none
** Returned value:          none
*********************************************************************************************************/
__asm void svcallHandle (unsigned int uiHandle)
{
    CMP     R0, #5
    IT      HS
    BXHS    LR
    LSL     R0, #2
    ADD     R0, PC
    LDR     PC, [R0, #+2]
table
    DCD     __s_OSCtxSw
    DCD     __s_OSStartHighRdy
    DCD     __s_OS_ENTER_CRITICAL
    DCD     __s_OS_EXIT_CRITICAL
    DCD     __s_changeToSYSMode
}
/*********************************************************************************************************
** Function name:           __OSStartHighRdy
** Descriptions:            uC/OS-II启动使用OSStartHighRdy运行第一个任务,OSStartHighRdy直接调用
**                          __OSStartHighRdy
** input parameters:        none
** output parameters:       none
** Returned value:          none
** Created by:              chenmingji
** Created Date:            2009-07-24
**--------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**--------------------------------------------------------------------------------------------------------
*********************************************************************************************************/
__asm void __OSStartHighRdy (void)
{
    MOV     R0, #1
    MSR     CONTROL, R0
    SWI     0
}

/*********************************************************************************************************
** Function name:           __s_OSStartHighRdy
** Descriptions:            uC/OS-II启动使用OSStartHighRdy运行第一个任务,OSStartHighRdy会调用
**                          __s_OSStartHighRdy
** input parameters:        none
** output parameters:       none
** Returned value:          none
** Created by:              chenmingji
** Created Date:            2009-07-24
**--------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**--------------------------------------------------------------------------------------------------------
*********************************************************************************************************/
__asm void __s_OSStartHighRdy (void)
{
    IMPORT  __GuiOsEnterSum
    IMPORT  OSRunning
    IMPORT  OSTCBCur
    IMPORT  OSTCBHighRdy
    IMPORT  OSTaskSwHook

         preserve8

    LDR     R4, =OSRunning
    MOV     R5, #1
    STRB    R5, [R4]

    MOV     R7, LR
    BL      OSTaskSwHook
    MOV     LR, R7

    LDR     R6, =OSTCBHighRdy
    LDR     R6, [R6]
    LDR     R4, =OSTCBCur
    STR     R6, [R4]

    LDR     SP, [R6]
    POP     {R0}
    LDR     R1, =__GuiOsEnterSum
    STR     R0, [R1]
    POP     {R4-R11}
    BX      LR
	NOP
}

/*********************************************************************************************************
** Function name:           __s_OSStartHighRdy
** Descriptions:            uC/OS-II任务调度函数
** input parameters:        none
** output parameters:       none
** Returned value:          none
** Created by:              chenmingji
** Created Date:            2009-07-24
**--------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**--------------------------------------------------------------------------------------------------------
*********************************************************************************************************/
__asm void __s_OSCtxSw (void)
{
    IMPORT  __GuiOsEnterSum
    IMPORT  OSTCBCur
    IMPORT  OSTCBHighRdy
    IMPORT  OSPrioCur
    IMPORT  OSPrioHighRdy
    IMPORT  OSTaskSwHook

         preserve8

    MOV     R2, #OS_ISR_PRIO_ONE
    MSR     BASEPRI, R2

    PUSH    {LR}
    BL      OSTaskSwHook
    POP     {LR}

    PUSH    {R4-R11}
    LDR     R1, =__GuiOsEnterSum
    LDR     R0, [R1]
    PUSH    {R0}

    LDR     R2, =OSTCBCur
    LDR     R2, [R2]
    STR     SP, [R2]
    
    LDR     R4, =OSPrioCur
    LDR     R5, =OSPrioHighRdy
    LDRB    R6, [R5]
    STRB    R6, [R4]

    LDR     R6, =OSTCBHighRdy
    LDR     R6, [R6]
    LDR     R4, =OSTCBCur
    STR     R6, [R4]

    LDR     SP, [R6]
    POP     {R0}
    STR     R0, [R1]

    CMP     R0, #0
    ITE     EQ
    MOVEQ   R2, #0
    MOVNE   R2, #OS_ISR_PRIO_ONE
    MSR     BASEPRI, R2    

    POP     {R4-R11}
    BX      LR
	NOP
}

/*********************************************************************************************************
** Function name:           __s_OS_ENTER_CRITICAL
** Descriptions:            禁止中断
**
** input parameters:        none
** output parameters:       none
** Returned value:          none
** Created by:              chenmingji
** Created Date:            2009-07-24
**--------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**--------------------------------------------------------------------------------------------------------
*********************************************************************************************************/
__asm void __s_OS_ENTER_CRITICAL (void)
{
    IMPORT  __GuiOsEnterSum

    LDR     R1, =__GuiOsEnterSum
    LDR     R0, [R1]
    ADD     R0, #1

    MOV     R2, #OS_ISR_PRIO_ONE
    MSR     BASEPRI, R2
    
    CMP     R0, #0