os_cpu_c.c

ucosii 移植到s1c33平台的3个关键文件 其中os_cpu_a.s 是 os_cpu_a.c 汇编优化 用一个就可以了

/*
*********************************************************************************************************
*                                               uC/OS-II
*                                        The Real-Time Kernel
*
*                         (c) Copyright 1992-2002, Jean J. Labrosse, Weston, FL
*                                          All Rights Reserved
*
* File : OS_CPU_C.C
* By   : Jean J. Labrosse
*********************************************************************************************************
*/

/*
*********************************************************************************************************
*                                               S1C33 Port
*
*                 Target           : S1C33L05
*                 Ported by        : zyl
*                 URL              : http://www.eebbk.com/    Email : [e-mail]
*
*********************************************************************************************************
*/

#define  OS_CPU_GLOBALS
#include "includes.h"

/*
*********************************************************************************************************
*                                       OS INITIALIZATION HOOK
*                                            (BEGINNING)
*
* Description: This function is called by OSInit() at the beginning of OSInit().
*
* Arguments  : none
*
* Note(s)    : 1) Interrupts should be disabled during this call.
*********************************************************************************************************
*/
#if OS_CPU_HOOKS_EN > 0 && OS_VERSION > 203
void  OSInitHookBegin (void)
{
}
#endif

/*
*********************************************************************************************************
*                                       OS INITIALIZATION HOOK
*                                               (END)
*
* Description: This function is called by OSInit() at the end of OSInit().
*
* Arguments  : none
*
* Note(s)    : 1) Interrupts should be disabled during this call.
*********************************************************************************************************
*/
#if OS_CPU_HOOKS_EN > 0 && OS_VERSION > 203
void  OSInitHookEnd (void)
{
}
#endif

/*
*********************************************************************************************************
*                                          TASK CREATION HOOK
*
* Description: This function is called when a task is created.
*
* Arguments  : ptcb   is a pointer to the task control block of the task being created.
*
* Note(s)    : 1) Interrupts are disabled during this call.
*********************************************************************************************************
*/
#if OS_CPU_HOOKS_EN > 0 
void  OSTaskCreateHook (OS_TCB *ptcb)
{
    ptcb = ptcb;                       /* Prevent compiler warning                                     */
}
#endif


/*
*********************************************************************************************************
*                                           TASK DELETION HOOK
*
* Description: This function is called when a task is deleted.
*
* Arguments  : ptcb   is a pointer to the task control block of the task being deleted.
*
* Note(s)    : 1) Interrupts are disabled during this call.
*********************************************************************************************************
*/
#if OS_CPU_HOOKS_EN > 0 
void  OSTaskDelHook (OS_TCB *ptcb)
{
    ptcb = ptcb;                       /* Prevent compiler warning                                     */
}
#endif

/*
*********************************************************************************************************
*                                             IDLE TASK HOOK
*
* Description: This function is called by the idle task.  This hook has been added to allow you to do  
*              such things as STOP the CPU to conserve power.
*
* Arguments  : none
*
* Note(s)    : 1) Interrupts are enabled during this call.
*********************************************************************************************************
*/
#if OS_CPU_HOOKS_EN > 0 && OS_VERSION >= 251
void  OSTaskIdleHook (void)
{
}
#endif

/*
*********************************************************************************************************
*                                           STATISTIC TASK HOOK
*
* Description: This function is called every second by uC/OS-II's statistics task.  This allows your 
*              application to add functionality to the statistics task.
*
* Arguments  : none
*********************************************************************************************************
*/

#if OS_CPU_HOOKS_EN > 0 
void  OSTaskStatHook (void)
{
}
#endif

/*
*********************************************************************************************************
*                                        INITIALIZE A TASK'S STACK
*
* Description: This function is called by either OSTaskCreate() or OSTaskCreateExt() to initialize the
*              stack frame of the task being created.  This function is highly processor specific.
*
* Arguments  : task          is a pointer to the task code
*
*              pdata         is a pointer to a user supplied data area that will be passed to the task
*                            when the task first executes.
*
*              ptos          is a pointer to the top of stack.  It is assumed that 'ptos' points to
*                            a 'free' entry on the task stack.  If OS_STK_GROWTH is set to 1 then 
*                            'ptos' will contain the HIGHEST valid address of the stack.  Similarly, if
*                            OS_STK_GROWTH is set to 0, the 'ptos' will contains the LOWEST valid address
*                            of the stack.
*
*              opt           specifies options that can be used to alter the behavior of OSTaskStkInit().
*                            (see uCOS_II.H for OS_TASK_OPT_???).
*
* Returns    : Always returns the location of the new top-of-stack' once the processor registers have
*              been placed on the stack in the proper order.
*
* Note(s)    : Interrupts are enabled when your task starts executing. Also that the tasks run in SVC
*              mode.
*********************************************************************************************************
*/

OS_STK *OSTaskStkInit (void (*task)(void *pd), void *pdata, OS_STK *ptos, INT16U opt)
{
    OS_STK *stk;

    opt    = opt;                           /* 'opt' is not used, prevent warning                      */
    stk    = ptos;                          /* Load stack pointer                                      */
    *(stk) = (OS_STK)task;                  /* pc: Entry Point                                         */
    *(--stk) = (INT32U)0x00000010;          /* PSR  */
#if 1  //测试                                                      
//    *(--stk) = (INT32U)0x15;                   /* R15 */
    *(--stk) = (INT32U)0x14;                   /* R14 */
    *(--stk) = (INT32U)0x13;                   /* R13 */
    *(--stk) = (INT32U)(pdata);                /* R12  */
    *(--stk) = (INT32U)0x11;                   /* R11 */
    *(--stk) = (INT32U)0x10;                   /* R10 */
    *(--stk) = (INT32U)0x09;                   /* R9  */
    *(--stk) = (INT32U)0x08;                   /* R8  */
    *(--stk) = (INT32U)0x07;                   /* R7  */
    *(--stk) = (INT32U)0x06;                   /* R6  */
    *(--stk) = (INT32U)0x05;                   /* R5  */
    *(--stk) = (INT32U)0x04;                   /* R4  */
    *(--stk) = (INT32U)0x03;                   /* R3  */
    *(--stk) = (INT32U)0x02;                   /* R2  */
    *(--stk) = (INT32U)0x01;                   /* R1  */
    *(--stk) = (INT32U)0x00;                   /* R0  */
    *(--stk) = (INT32U)0xa010;                 /* AHR */
    *(--stk) = (INT32U)0xa001;                 /* ALR*/
#else
    *(--stk) = (INT32U)0;                   /* R15 */
    *(--stk) = (INT32U)0;                   /* R14 */
    *(--stk) = (INT32U)0;                   /* R13 */
    *(--stk) = (INT32U)(pdata);                /* R12  */
    *(--stk) = (INT32U)0;                   /* R11 */
    *(--stk) = (INT32U)0;                   /* R10 */
    *(--stk) = (INT32U)0;                   /* R9  */
    *(--stk) = (INT32U)0;                   /* R8  */
    *(--stk) = (INT32U)0;                   /* R7  */
    *(--stk) = (INT32U)0;                   /* R6  */
    *(--stk) = (INT32U)0;                   /* R5  */
    *(--stk) = (INT32U)0;                   /* R4  */
    *(--stk) = (INT32U)0;                   /* R3  */
    *(--stk) = (INT32U)0;                   /* R2  */
    *(--stk) = (INT32U)0;                   /* R1  */
    *(--stk) = (INT32U)0;                   /* R0  */
    *(--stk) = (INT32U)0;                 /* ALR */
    *(--stk) = (INT32U)0;                 /* AHR*/   
//    *(--stk) = (INT32U)0;                   /* SP*/
#endif

    return (stk);
}

/*
*********************************************************************************************************
*                                           TASK SWITCH HOOK
*
* Description: This function is called when a task switch is performed.  This allows you to perform other
*              operations during a context switch.
*
* Arguments  : none
*
* Note(s)    : 1) Interrupts are disabled during this call.
*              2) It is assumed that the global pointer 'OSTCBHighRdy' points to the TCB of the task that
*                 will be 'switched in' (i.e. the highest priority task) and, 'OSTCBCur' points to the 
*                 task being switched out (i.e. the preempted task).
*********************************************************************************************************
*/
#if OS_CPU_HOOKS_EN > 0 
void  OSTaskSwHook (void)
{
}
#endif

/*
*********************************************************************************************************
*                                           OSTCBInit() HOOK
*
* Description: This function is called by OS_TCBInit() after setting up most of the TCB.
*
* Arguments  : ptcb    is a pointer to the TCB of the task being created.
*
* Note(s)    : 1) Interrupts may or may not be ENABLED during this call.
*********************************************************************************************************
*/
#if OS_CPU_HOOKS_EN > 0 && OS_VERSION > 203
void  OSTCBInitHook (OS_TCB *ptcb)
{
    ptcb = ptcb;                                           /* Prevent Compiler warning                 */
}
#endif


/*
*********************************************************************************************************
*                                               TICK HOOK
*
* Description: This function is called every tick.
*
* Arguments  : none
*
* Note(s)    : 1) Interrupts may or may not be ENABLED during this call.
*********************************************************************************************************
*/
#if OS_CPU_HOOKS_EN > 0 
void  OSTimeTickHook (void)
{
}
#endif

INT32U        OSIntCtxSwFlag = 0;           /* Used to flag a context switch                           */