os_cpu.h
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上传日期:2022-06-22
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文件大小:4k
- /*
- *********************************************************************************************************
- * uC/OS-II
- * The Real-Time Kernel
- *
- * (c) Copyright 2006, Micrium, Inc, Weston, FL
- * All Rights Reserved
- *
- * Coldfile Specific code
- *
- * File : OS_CPU.H
- * By : Jean J. Labrosse
- *********************************************************************************************************
- */
- #ifndef OS_CPU_H
- #define OS_CPU_H
- /*
- *********************************************************************************************************
- * DATA TYPES
- *********************************************************************************************************
- */
- typedef unsigned char BOOLEAN;
- typedef unsigned char INT8U;
- typedef signed char INT8S;
- typedef unsigned short INT16U;
- typedef signed short INT16S;
- typedef unsigned int INT32U;
- typedef signed int INT32S;
- typedef float FP32;
- typedef double FP64;
- typedef unsigned int OS_STK; //ColdFireCPU中的堆栈入口数据长度32位
- typedef unsigned short OS_CPU_SR; //定义了ColdFire CPU中的SR寄存器16位
- /*
- *********************************************************************************************************
- * Motorola ColdFire Inline Assembly
- *
- * Method #1: Disable/Enable interrupts using simple instructions. After critical section, interrupts
- * will be enabled even if they were disabled before entering the critical section.
- *
- * Method #2: Disable/Enable interrupts by preserving the state of interrupts. In other words, if
- * interrupts were disabled before entering the critical section, they will be disabled when
- * leaving the critical section.
- *
- * Method #3: Disable/Enable interrupts by preserving the state of interrupts. Generally speaking you
- * would store the state of the interrupt disable flag in the local variable 'cpu_sr' and then
- * disable interrupts. 'cpu_sr' is allocated in all of uC/OS-II's functions that need to
- * disable interrupts. You would restore the interrupt disable state by copying back 'cpu_sr'
- * into the CPU's status register.
- *********************************************************************************************************
- */
- //定义进入临界区代码的方法
- #define OS_CRITICAL_METHOD 1
-
- #if OS_CRITICAL_METHOD == 1
- #define OS_ENTER_CRITICAL() asm(move.w #0x2700,sr) //禁止中断
- #define OS_EXIT_CRITICAL() asm(move.w #0x2000,sr) //使能中断
- #endif
-
- //定义任务切换的指令
- #define OS_TASK_SW() asm(TRAP #14;) //使用Trap #14执行任务级切换
-
- #define OS_STK_GROWTH 1 /* Define stack growth: 1 = Down, 0 = Up */
- /*
- *********************************************************************************************************
- * ColdFire Specifics
- *********************************************************************************************************
- */
- #define OS_INITIAL_SR 0x2000 /* Supervisor mode, interrupts enabled */
- #define OS_TRAP_NBR 14 /* OSCtxSw() invoked through TRAP #14 */
- #define SYSTEM_CLOCK 60000 /* system bus frequency */
- /*
- *********************************************************************************************************
- * PROTOTYPES
- *********************************************************************************************************
- */
- #if OS_CRITICAL_METHOD == 3
- OS_CPU_SR OS_CPU_SR_Save(void);
- void OS_CPU_SR_Restore(OS_CPU_SR cpu_sr);
- #endif
- void OSStartHighRdy(void);
- void OSIntCtxSw(void);
- void OSCtxSw(void);
- void OSInitVBR(void);
- void OSVectSet(INT8U vect, void (*addr)(void));
- INT32U OSVectGet(INT8U vect);
- #endif