os_cpu.h

uC/OS II 在H8/2134平台上的移植代码

/*
*********************************************************************************************************
*                                               uC/OS-II
*                                        The Real-Time Kernel
*
*                           (c) Copyright 2002, Jean J. Labrosse, Weston, FL
*                                          All Rights Reserved
*
*                                           H8S Specific code
*                                            (ADVANCED mode)
*
* File         : OS_CPU.H
* By           : Jean J. Labrosse
* Port Version : V1.00
* Compiler     : IAR Embedded Workbench for the H8S V1.53E
*********************************************************************************************************
*/

#ifndef _Os_cpu_h_
#define _Os_cpu_h_

#ifdef  OS_CPU_GLOBALS
#define OS_CPU_EXT
#else
#define OS_CPU_EXT  extern
#endif

/*
*********************************************************************************************************
*                                              DATA TYPES
*********************************************************************************************************
*/

typedef  signed    char    BYTE;                     /*  8 bit unsigned integer                        */
typedef  unsigned  char    UBYTE;                    /*  8 bit unsigned integer                        */
typedef  signed    short   WORD;                     /* 16 bit   signed integer                        */
typedef  unsigned  short   UWORD;                    /* 16 bit unsigned integer                        */
typedef  signed    long    LONG;                     /* 32 bit   signed integer                        */
typedef  unsigned  long    ULONG;                    /* 32 bit unsigned integer                        */
typedef            float   FP;                       /* 32 bit floating point                          */
typedef            double  DOUBLE;                   /* 64 bit floating point                          */

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  short   OS_STK;                   /* Each stack entry is 16-bit wide                */
typedef  unsigned  char    OS_CPU_SR;                /* CPU Status Register                            */

/* 
*********************************************************************************************************
*                                           Hitachi H8/300H
*
* 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.  You MUST
*             change the constant in OS_CPU_A.ASM, function OSIntCtxSw() from 10 to 8.
*
* 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.  You MUST change the constant in OS_CPU_A.ASM, function 
*             OSIntCtxSw() from 8 to 10.
*
* 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 == 1
#define OS_ENTER_CRITICAL()   \
        set_imask_ccr(1);
        

#define OS_EXIT_CRITICAL()    \
        set_imask_ccr(0);
#endif


#if OS_CRITICAL_METHOD == 2
#define OS_ENTER_CRITICAL()   \
        cpu_sr = get_ccr();   \
        or_ccr(0x80);
        

#define OS_EXIT_CRITICAL()    \
        set_ccr(cpu_sr);
#endif


#if OS_CRITICAL_METHOD == 3
#define OS_ENTER_CRITICAL()   \
        cpu_sr = get_ccr();   \
        or_ccr(0x80);
        

#define OS_EXIT_CRITICAL()    \
        set_ccr(cpu_sr);
#endif


#define  OS_TASK_SW()         trapa(0)

#define  OS_STK_GROWTH        1                  /* Define stack growth: 1 = Down, 0 = Up              */

#endif
//============================= end ================================