os_cpu_c.rar_OS_CPU_C_lpc2104_os

/* ********************************************************************************************************* * uC/OS-II * The Real-Time Kernel * * * (c) Copyright 1992-2004, Micrium, Weston, FL * All Rights Reserved * * Generic ARM Port * * File : OS_CPU_C.C * Version : V1.60 * By : Jean J. Labrosse * * For : ARM7 or ARM9 * Mode : ARM or Thumb * Toolchain : IAR's EWARM V4.11a and higher ********************************************************************************************************* */ #define OS_CPU_GLOBALS #include <ucos_ii.h> #if OS_VIEW_MODULE > 0 #include <OS_VIEWc.H> #include <OS_VIEW.H> #endif #define ARM_MODE_ARM 0x00000000 #define ARM_MODE_THUMB 0x00000020 /* __CPU_MODE__ is an IAR built-in constant indicating whether ... */ /* ... code of this file was compiled using ARM or Thumb mode */ #if __CPU_MODE__ == 1 #define ARM_SVC_MODE (0x00000013L + ARM_MODE_THUMB) #else #define ARM_SVC_MODE (0x00000013L + ARM_MODE_ARM) #endif /* ********************************************************************************************************* * 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) { #if OS_CPU_INT_DIS_MEAS_EN > 0 OS_CPU_IntDisMeasInit(); #endif } #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) { #if OS_VIEW_MODULE > 0 OSView_TaskCreateHook(ptcb); #else ptcb = ptcb; /* Prevent compiler warning */ #endif } #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 * * p_arg 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_xxx). * * 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) : 1) Interrupts are enabled when your task starts executing. * 2) All tasks run in SYS mode. ********************************************************************************************************* */ OS_STK *OSTaskStkInit (void (*task)(void *p_arg), void *p_arg, 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; /* Entry Point */ *(--stk) = (INT32U)0x14141414L; /* R14 (LR) */ *(--stk) = (INT32U)0x12121212L; /* R12 */ *(--stk) = (INT32U)0x11111111L; /* R11 */ *(--stk) = (INT32U)0x10101010L; /* R10 */ *(--stk) = (INT32U)0x09090909L; /* R9 */ *(--stk) = (INT32U)0x08080808L; /* R8