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os_cpu.h
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上传日期：2022-07-18
资源大小：183k
文件大小：6k
源码类别：
微处理器开发
开发平台：
C/C++
- /*
- *********************************************************************************************************
- * uC/OS-II
- * The Real-Time Kernel
- *
- *
- * (c) Copyright 1992-2004, Micrium, Weston, FL
- * All Rights Reserved
- *
- * Generic ARM Port
- *
- * File : OS_CPU.H
- * Version : V1.60
- * By : Jean J. Labrosse
- *
- * For : ARM7 or ARM9
- * Mode : ARM or Thumb
- * Toolchain : ARM Developer Suite Version 1.2 and higher
- *********************************************************************************************************
- */
- #ifndef OS_CPU_H
- #define OS_CPU_H
- #ifdef OS_CPU_GLOBALS
- #define OS_CPU_EXT
- #else
- #define OS_CPU_EXT extern
- #endif
- /*
- *********************************************************************************************************
- * INTERRUPT DISABLE TIME MEASUREMENT
- *********************************************************************************************************
- */
- #define OS_CPU_INT_DIS_MEAS_EN 0
- /*
- *********************************************************************************************************
- * DATA TYPES
- * (Compiler Specific)
- *********************************************************************************************************
- */
- typedef unsigned char BOOLEAN;
- typedef unsigned char INT8U; /* Unsigned 8 bit quantity */
- typedef signed char INT8S; /* Signed 8 bit quantity */
- typedef unsigned short INT16U; /* Unsigned 16 bit quantity */
- typedef signed short INT16S; /* Signed 16 bit quantity */
- typedef unsigned long INT32U; /* Unsigned 32 bit quantity */
- typedef signed long INT32S; /* Signed 32 bit quantity */
- typedef float FP32; /* Single precision floating point */
- typedef double FP64; /* Double precision floating point */
- typedef unsigned int OS_STK; /* Each stack entry is 32-bit wide */
- typedef unsigned int OS_CPU_SR; /* Define size of CPU status register (PSR = 32 bits) */
- /*
- *********************************************************************************************************
- * ARM
- *
- * 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.
- * NOT IMPLEMENTED
- *
- * 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.
- * NOT IMPLEMENTED
- *
- * 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.
- *********************************************************************************************************
- */
- #define OS_CRITICAL_METHOD 3
- #if OS_CRITICAL_METHOD == 3
- #if OS_CPU_INT_DIS_MEAS_EN > 0
- #define OS_ENTER_CRITICAL() {cpu_sr = OS_CPU_SR_Save();
- OS_CPU_IntDisMeasStart();}
- #define OS_EXIT_CRITICAL() {OS_CPU_IntDisMeasStop();
- OS_CPU_SR_Restore(cpu_sr);}
- #else
- #define OS_ENTER_CRITICAL() {cpu_sr = OS_CPU_SR_Save();}
- #define OS_EXIT_CRITICAL() {OS_CPU_SR_Restore(cpu_sr);}
- #endif
- #endif
- /*
- *********************************************************************************************************
- * ARM Miscellaneous
- *********************************************************************************************************
- */
- #define OS_STK_GROWTH 1 /* Stack grows from HIGH to LOW memory on ARM */
- #define OS_TASK_SW() OSCtxSw()
- /*
- *********************************************************************************************************
- * GLOBAL VARIABLES
- *********************************************************************************************************
- */
- /* Variables used to measure interrupt disable time */
- #if OS_CPU_INT_DIS_MEAS_EN > 0
- OS_CPU_EXT INT16U OS_CPU_IntDisMeasNestingCtr;
- OS_CPU_EXT INT16U OS_CPU_IntDisMeasCntsEnter;
- OS_CPU_EXT INT16U OS_CPU_IntDisMeasCntsExit;
- OS_CPU_EXT INT16U OS_CPU_IntDisMeasCntsMax;
- OS_CPU_EXT INT16U OS_CPU_IntDisMeasCntsDelta;
- OS_CPU_EXT INT16U OS_CPU_IntDisMeasCntsOvrhd;
- #endif
- /*
- *********************************************************************************************************
- * PROTOTYPES
- *********************************************************************************************************
- */
- #if OS_CRITICAL_METHOD == 3
- OS_CPU_SR OS_CPU_SR_Save(void); /* See OS_CPU_A.S */
- void OS_CPU_SR_Restore(OS_CPU_SR cpu_sr);
- #endif
- void OSTimeTickISR(void);
- void OSCtxSw(void);
- void OSIntCtxSw(void);
- void OSStartHighRdy(void);
- void OSTimeTickISRHandler(void); /* See BSP.C */
- #if OS_CPU_INT_DIS_MEAS_EN > 0
- void OS_CPU_IntDisMeasInit(void);
- void OS_CPU_IntDisMeasStart(void);
- void OS_CPU_IntDisMeasStop(void);
- INT16U OS_CPU_IntDisMeasTmrRd(void);
- #endif
- #endif
