os_cpu.h

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/*
*********************************************************************************************************
*                                               uC/OS-II
*                                        The Real-Time Kernel
*
*                           (c) Copyright 1999, Jean J. Labrosse, Weston, FL
*                                          All Rights Reserved
*
*                                         H8-300H Specific code
*                                            (ADVANCED mode)
*
* File         : OS_CPU.H
* By           : Bill Knight (GNU/ADVANCED port)
*                Jean J. Labrosse
*                Dr. Odd Arild Olsen (original uC/OS port)
* Port Version : V1.00
*********************************************************************************************************
*/

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

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                    */

#define BYTE           INT8S                     /* Define data types for backward compatibility ...   */
#define UBYTE          INT8U                     /* ... to uC/OS V1.xx                                 */
#define WORD           INT16S
#define UWORD          INT16U
#define LONG           INT32S
#define ULONG          INT32U

typedef unsigned short OS_STK;                   /* Each stack entry is 16-bits wide                   */

/*
*********************************************************************************************************
*                                              CONSTANTS
*********************************************************************************************************
*/

#ifndef  FALSE
#define  FALSE    0
#endif

#ifndef  TRUE
#define  TRUE     1
#endif

/* 
*********************************************************************************************************
*                                           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.  
*
* 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.
*********************************************************************************************************
*/
#define  OS_CRITICAL_METHOD    2


#if      OS_CRITICAL_METHOD == 1
#define  OS_ENTER_CRITICAL()  asm("orc.b #0xC0,ccr")
#define  OS_EXIT_CRITICAL()   asm("andc.b #0x3F,ccr")
#endif



#if      OS_CRITICAL_METHOD == 2
#define  OS_ENTER_CRITICAL()  {asm("stc ccr,@-er7"); \
                               asm("orc.b #0xC0,ccr");}
#define  OS_EXIT_CRITICAL()    asm("ldc  @er7+,ccr");
#endif


#define  OS_TASK_SW()         asm("trapa #3")

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