gsblk.h

用于TM1300/PNX1300系列DSP（主要用于视频处理）的操作系统pSOS。包括全部源码

/***********************************************************************/
/*                                                                     */
/*   MODULE:  gsblk.h   1.3                                                */
/*   DATE:    11:19:28 - 98/10/21                                                */
/*   PURPOSE: Definitions for General Serial Message Blocks            */
/*                                                                     */
/*---------------------------------------------------------------------*/
/*                                                                     */
/*           Copyright 1994, Integrated Systems, Inc.                  */
/*                      ALL RIGHTS RESERVED                            */
/*                                                                     */
/*   Permission is hereby granted to licensees of Integrated Systems,  */
/*   Inc. products to use or abstract this computer program for the    */
/*   sole purpose of implementing a product based on Integrated        */
/*   Systems, Inc. products.   No other rights to reproduce, use,      */
/*   or disseminate this computer program, whether in part or in       */
/*   whole, are granted.                                               */
/*                                                                     */
/*   Integrated Systems, Inc. makes no representation or warranties    */
/*   with respect to the performance of this computer program, and     */
/*   specifically disclaims any responsibility for any damages,        */
/*   special or consequential, connected with the use of this program. */
/*                                                                     */
/*---------------------------------------------------------------------*/
/*                                                                     */
/*                                                                     */
/*                                                                     */
/***********************************************************************/

#ifndef _GSBLK_H
#define _GSBLK_H

/*---------------------------------------------------------------------*/
/* Must include pna.h before this file                                 */
/*---------------------------------------------------------------------*/
#ifndef _PNA_H
    #include "pna.h"
#endif

#define MAXBUFFERS 256
#define BPRI_LO  0
#define BPRI_MED 1
#define BPRI_HI  2

/*----------------------------------------------------------------------*/
/* Data block structure for esballoc call. It need to store all the     */
/* data blocks allocated thru' esballoc in a linked to be freed at      */
/* pSOS restart time. Esballoc can be used by the driver attach a data  */
/* buffer. This can be done before pSOS is initialized                  */
/*----------------------------------------------------------------------*/
struct esbdatab
  {
  dblk_t esb_dblk;              /* Data block */
  struct esbdatab *next;        /* Next link */
  struct esbdatab *prev;        /* Previous link */
  };
typedef struct esbdatab esbdblk_t;  

/*----------------------------------------------------------------------*/
/* Structure for holding the esballoc allocated buffers                 */
/*----------------------------------------------------------------------*/
struct dblkq
  {
  esbdblk_t *next;
  esbdblk_t *prev;
  };

/*----------------------------------------------------------------------*/
/* Definition of the buffer configuration table                         */
/*----------------------------------------------------------------------*/
struct gsblk_bufcfg
    {
    unsigned long nbuffers;   /* Number of buffers */
    unsigned long bsize;      /* Buffer size */
    unsigned long reserved[2];/* Reserved entries */
    };

typedef struct gsblk_bufcfg gsblk_bufcfg_t;  

/*---------------------------------------------------------------------*/
/* Prototypes for global functions.                                    */
/*---------------------------------------------------------------------*/
mblk_t *gs_allocb(int size, int pri);
mblk_t *gs_esballoc(unsigned char *base, int size, int pri, frtn_t *frtn);
void gs_freemsg(register mblk_t *mp);

#endif