os_cpu.h

uCOS-II lwIP ports for TI C6000 DSP

/*
*********************************************************************************************************
*                                               uC/OS-II
*                                        The Real-Time Kernel
*
*                         (c) Copyright 1992-2002, Jean J. Labrosse, Weston, FL
*                                          All Rights Reserved
*
*                                     TI C6711 DSP Specific code
*                                          Little Endian Mode
*
*                                      Code Composer Studio V2.2
*
* File         : OS_CPU.H
* By	       : Ming Zeng ([e-mail]) 2003.11
; History      : Kenneth Blake 	(the author of V2.00 port for C6211)
*********************************************************************************************************
*/

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

/*
*********************************************************************************************************
*                                              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 int   INT32U;                   /* Unsigned 32 bit quantity                           */
typedef signed   int   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 in C6711DSP        */

#define BYTE           INT8S                     /* Define data types for backward compatibility ...   */
#define UBYTE          INT8U                     /* ... to uC/OS V1.xx.  Not actually needed for ...   */
#define WORD           INT16S                    /* ... uC/OS-II.                                      */
#define UWORD          INT16U
#define LONG           INT32S
#define ULONG          INT32U

/* 
*********************************************************************************************************
*												Interrupter~!
*
*										With TI CCS Library of C6x DSP
*********************************************************************************************************
*/

extern cregister volatile unsigned int CSR ;
void Disable_int(void);	//function for disable interrupt
void Enable_int(void);	//function for enable interrupt

#define  OS_ENTER_CRITICAL()  Disable_int()	//CSR &= 0xfffe;asm("	nop 4");	/* Disable interrupts*/
#define  OS_EXIT_CRITICAL()   Enable_int()	//CSR |= 0x0001;asm("	nop 4");	/* Enable  interrupts*/

/*
*********************************************************************************************************
*                           		TI C6711 DSP Miscellaneous
*********************************************************************************************************
*/

#define  OS_STK_GROWTH        1                       /* Stack grows from HIGH to LOW memory */

#define  OS_TASK_SW()         OSCtxSw()



/*$PAGE*/
/*
*********************************************************************************************************
*                      		Some Definitions for operation of stack
*********************************************************************************************************
*/

typedef int REGISTERS;					/* Define the REGISTERS type - 32bit */


/*------------------------------------------------------------------------
/	THE SP MUST BE ALIGNED ON AN 8-BYTE BOUNDARY.  (Ref. Datasheet of C6711 DSP )                        
/	WHICH means that the framesize has to be a multiple of 8-BYTE.
/------------------------------------------------------------------------*/

typedef struct 
{
//The start address of the Task (point of the task function)	-------- 4-BYTE
   void    (*Start_Address)(void *Task_Data_Pointer);	

//All the General-Purpose Registers of the DSP (32 Registers)	-------- 32 X 4-BYTE
   REGISTERS	A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15;
   REGISTERS	B0, B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12, B13, B14, B15;

//Save all Control Registers of the DSP	-------- 4 X 4-BYTE
   int
          AMR,		//Adressing_Mode_Register
          CSR,		//Control_Status_Register
          IER,		//Interrupt_Enable_Register
          IRP;		//Interrupt_Return_Pointer
          
//A 4-BYTE dummy, just keep the SP is aligned on an 8-BYTE boundary
   int	  Dummy;
   } INIT_STACK_FRAME;